Witam LED Sony Bravia KDL-40NX720 z problemem włączenia, po podłączeniu do gniazdka zaczyna przez 2-3 sekundy migać czerwona dioda standby w normalny sposób (jak to bywa przy sprawnym tv) a po tym czasie uruchamia się tryb Protection mode i dioda stanby zaczyna migać 2 razy w krótkich odstępach i przerwa dłuższa. Zaopatrzyłem się w dwa SM, jeden pod model xxEXxx 816916 i drugi właściwy dla mojego modelu xxNXxx. 816919 Dowiedziałem się z SM EX że 2-krotne mignięcie wskazuje na problem z zasilaniem, w tym samym manualu wyczytałem: 2X Blink - Main Power Error A 2X protection mode blink pattern can be activated due one of the following defects. ●● Loss of REG12V (LVP)* ●● Loss of -125V (Single Line) - Wiadomo w naszych warunkach chodzi o 230V :) ●● Excessive -125V Level (OVP)* ●● Loss of Power-ON Signal ●● Excessive PFC Voltage (OVP) ●● Excessive PFC Temperature (OTP) *Low Voltage Protection (LVP) *Over Voltage Protection (OVP) A loss or excessive condition of the REG12VDC secondary voltage from the main power supply IC6351 will cause a 2X blink pattern on the standby LED. The 12Vdc can be checked at CN6704/pin 16. If the measurement is 0V or rises above 12Vdc (approaches 15V) before the TV shuts down the Power Supply Board is defective. If approximately 12Vdc is present and remains below 12Vdc before shutdown then further troubleshooting is necessary to determine the defective component. After confirming proper REG12V levels, check the Negative LED Backlight supply levels. A loss or excessive condition of the negative supply will cause a 2X blink failure. The voltage level can be checked at CN6701/pins 1 & 3 before the TV shuts off. There will be 2 to 4 wires (Red & Blue) depending on the panel size. All individual wires should be checked for proper voltage level. In normal operation the voltage level will initially rise to approximately -175V and then should regulate down to between 89V and 125V depending on the Backlight adjustment in the User Menu. If one of the negative supplies is 0V or rises above -175V before shut-off then the Power Supply Board is defective, replace it to fix the problem. A defective X-Reality processor on the Main Board or Switch circuit on the Power Supply Board will cause a loss of the Power-ON signal (2X). To determine which component is defective check the Power- ON voltage level at CN6704/pin 1. In normal operation 3V should be measured. If the 3V is present before shut-off then the Power Supply Board is defective. If 0V is measured before shut-off then the Main Board is defective. Finally, there are PFC protection circuits on the Power Supply Board that when activated will cause a 2X blink protection mode. The PFC circuit is monitored for both over-voltage and over-temperature. Therefore, if all the previously discussed circuits checkout okay, there could still be a problem on the Power Supply Board in the PFC circuit causing the 2X blink. Replacing the Power Supply Board will fix the TV Więc też według diagramu zamieszczonego sprawdzałem po kolei napięcia przy braku zasilania i 2x mignięciu czerwonej diody: napięcie STBY_3.3 jest, 3,29V napięcie w standby AC-OFF-DETect jest ale o wartości 2,8V (wg schematu ma być 3.3V) kolejny pomiar to REG12V Check REG12V *Before Shutdown i tego napięcia nie ma, z wyżej podanego opisu rozumie że wartość miała by się pojawić podczas wyciągnięcia wtyczki z gniazdka, jeśli się mylę to proszę dacie znać. Napięć do karty kontrolera LED też nie ma, pewnie ze względu na błąd. Co do 12V na płycie G4 Board czyli zasilającej to uzyskiwane jest (jak dla mnie) w nieco odmienny sposób niż spotykałem się do tej pory. Ze schematu domyślam się że układ CXA3810M-T6 (IC6501) kontrolera AC-DC dając napięcie na transformator TSU13A224 (T6101) i przepuszczając dalej tranzystorami MOSFET TK5A50D (Q6101; Q6104) ostatecznie daje nam REG12V. 816930 Na wejściu (pin18, pin19) IC6501 napięcie 17V, na wyjściu pin 21 i 23 - RM_OUTP / RM_OUTN brak napięcia.. przy czym nie wiem czy to wina miernika (zwykły Uni-T M890G) który nie jest w stanie zmierzyć generowanego przebiegu, czy faktycznie nie ma tam napięcia w stanie StandBy, może trzeba go wzbudzić sygnałem. Będę wdzięczny za pomoc co w tej chwili począć. Prośbę swą kieruję przede wszystkim do kolegów z bagażem doświadczeń w tym fachu i specjalizacji TV. Płyta B Board: Sony G4 2011 APS-293 (CH) /1-883-924-12 /40" G4BW BAT-L Y2009470A 006688 Rev101 Soft3121 Matryca LSY400HF01 Dziękuję z góry za wyrozumiałość i pomoc Znalazłem jeszcze jeden plik dla "chassis - sony_kdl-40nx720_kdl-46nx720_kdl-55nx720_kdl-60nx720_chassis_az2-f" 816948
AC-DC Controller
CXA3810M
Description
The CXA3810M has optimum configuration to realize various power supply circuits easily and compactly by
including Power-factor correction, resonant controller and various protection function in one package.
(Applications: Power supply circuit, etc.)
Features
Power-factor correction
Critical conduction mode PFC control
Supports W/W input
Start timer
Maximum frequency limit (During overcurrent detection)
Continuous overcurrent detection protection function
Resonant controller
Timer-latch over current protection
Soft start function
Adjustment minimum frequency limit
Pulse over current load detection
Common
Adjacent 2-pin short protection
Various protection functions including overvoltage and overcurrent
AC off detection
PFC-OK signal output
Structure
BiCMOS silicon monolithic IC
Package
24-pin SOP
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating
the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
-1-
E10629
Free Datasheet http://www.datasheet4u.com/
CXA3810M
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Remarks
24.0
V
VCC
Maximum supply voltage
VCC
Pin voltage which operates
with VCC as power supply
VCCIN
–0.3 to VCC + 0.3
V
AC_DETIN, AC_DETOUT,
AC_VRMS, B_OK, MODE1, MODE2
Driver output pin voltage
VOUT
–0.3 to VCC + 0.3
V
PFC_OUT, RM_OUTP, RM_OUTN
Power supply pin voltage
for internal circuit
VREF
–0.3 to +7.0
V
VREF
–0.3 to +7.0
V
PFC_OVP, PFC_CS, PFC_VAO,
PFC_TONMAX, PFC_VSENSE,
RM_OFFADJ, RM_RT, RM_SS,
RM_CS1, RM_CS2, RM_FMIN
Pin voltage which operates
with VREF as power supply
VREFIN
ZCD current
Izcd
7
mA
PFC_ZCD
Allowable power
dissipation
PD
*1
mW
(See the thermal derating curve.)
Operating ambient
temperature range
Topt
–30 to +125
C
Junction temperature
Tjmax
+150
C
Storage temperature
Tstg
–55 to +150
C
*1
Allowable power dissipation reduction characteristics
Allowable power dissipation [mW]
1000
800
600
400
200
88.5˚C
49.2˚C
–20
0
20
40
60
80
125˚C
100
120
140
160
Operating ambient temperature Ta [˚C]
Glass fabric base epoxy board 76mm × 114mm t = 1.6mm
Recommended Operating Conditions
Item
Symbol
Rating
Unit
Supply voltage (VCC system)
VCC
12.0 to 18.0
V
Operating ambient
temperature range
Topt
–25 to +85
C
Junction temperature
Tj
–25 to +125
Remarks
C
-2Free Datasheet http://www.datasheet4u.com/
CXA3810M
Block Diagram
VCC
19
AC_DETIN
AC_VRMS
VCC
3
4
AC Input
Detector
22 AC_DETOUT
VCC
1MΩ
TSD
EN
VBGR
UVLO/TSD
VCC VCC
50kΩ
AC_VRMS
50kΩ
MODE1 2
PFC
ON/OFF
PFC_EN
RM_EN
1.85V/1.65V
NG Latch
MODE
Detector
MODE2 24
17 VREF
4.0V
COMMON
Control
VCC
B_OK
20 B_OK
External
Latch
RM_OFFADJ 11
RM_Stop
RM_SS_OK
PFC_VSENSE
AC_VRMS
X
Y
X2.Y
PFC_TONMAX 10
PFC_OUT
PFC_CS 6
AC_VRMS
X
1/X
V_OCP
V_DPL
PFC_ZCD 5
Dynamic
Power Limit
Control
VCC
On-Time
Control
1
PFC_OUT
ZCD_Comp 1
VREF
PFC_OVP 9
PFC_OCP
1.5V/1.3V
0.1µA
Voltage_Amp
PFC_VSENSE 8
2.5V
PFC_VAO 7
RM_RT 16
RM_SS 13
VCC
23 RM_OUTP
SS CNT
RM_FMIN 12
RM_CS1 15
RM_CS DET
RM_CS2 14
RM
OSC
Fmin CNT
RM
Control
DB 300ns
VCC
21 RM_OUTN
18
GND
-3Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin Configuration
PFC_OUT
1
24
MODE2
MODE1
2
23
RM_OUTP
AC_DETIN
3
22
AC_DETOUT
AC_VRMS
4
21
RM_OUTN
PFC_ZCD
5
20
B_OK
PFC_CS
6
19
VCC
PFC_VAO
7
18
GND
PFC_VSENSE
8
17
VREF
PFC_OVP
9
16
RM_RT
PFC_TONMAX
10
15
RM_CS1
RM_OFFADJ
11
14
RM_CS2
RM_FMIN
12
13
RM_SS
Top View
-4Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin Table
Pin
No.
Symbol
Description
Connection
end of
protection
diode
1
PFC_OUT
PFC MOSFET gate driver output
-
2
MODE1
Mode determination pin1 (Active STBY when MODE1 = Low,
MODE2 = High)
VCC, GND
3
AC_DETIN
AC voltage sense input
VCC, GND
4
AC_VRMS
AC peak voltage sense and PFC enable
VCC, GND
5
PFC_ZCD
PFC zero current detect input
VCC, GND
6
PFC_CS
PFC current sense input
VREF, GND
7
PFC_VAO
PFC voltage control error amplifier output
VREF, GND
8
PFC_VSENSE
PFC output voltage sense input
VREF, GND
9
PFC_OVP
PFC output overvoltage sense input
VREF, GND
10
PFC_TONMAX
PFC maximum ON time control
VREF, GND
11
RM_OFFADJ
Resonant controller stop voltage adjustment and abnormal latch
input
VREF, GND
12
RM_FMIN
Resonant controller minimum frequency setting
VREF, GND
13
RM_SS
Resonant controller soft start and overcurrent timer-latch setting
VREF, GND
14
RM_CS2
Resonant controller overcurrent sense input (continuous
overcurrent)
VREF
15
RM_CS1
Resonant controller overcurrent sense input (pulse by pulse
overcurrent)
VREF
16
RM_RT
Resonant controller frequency control
VREF, GND
17
VREF
Internal supply voltage
VCC, GND
18
GND
GND
19
VCC
Power supply input
20
B_OK
PFC-OK signal output
—
21
RM_OUTN
Resonant controller Low-side MOSFET driver output
—
22
AC_DETOUT
AC off detect signal output
—
23
RM_OUTP
Resonant controller High-side MOSFET driver output
—
24
MODE2
Mode determination pin2 (SEQ mode when MODE1 = Low,
MODE2 = Low)
—
GND
VCC, GND
-5Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin Description
Pin
No.
Symbol
I/O
Standard pin
voltage
Equivalent circuit
Description
VCC
VREF
Pch
1
PFC_OUT
O
1
Pch
VCC to GND
Nch
Nch
PFC MOSFET gate driver
output
(Connect to the NMOS
gate for PFC)
GND
VCC
2
24
MODE1
MODE2
II
VCC to GND
Mode select input
(GND connection: Normal
sequence VCC
connection: Standby
mode)
Nch
2
24
GND
VCC
Pch
3
AC_DETIN
I
VCC to GND
Pch
VREF
3
Pch
Nch
AC voltage input
(Connect to AC input
detection resistor)
Nch
Pch
GND
VCC
Pch
4
AC_VRMS
I/O
(VCC – 2.0V)
to GND
4
Pch
AC peak voltage sense
and PFC enable
(Connect to peak voltage
hold capacitor)
Nch
GND
VCC
VREF
Nch
5
PFC_ZCD
I
4.4V to 0.6V
5
Pch
PFC zero current detect
input
(Connect to boost inductor
of auxiliary winding)
Pch
GND
-6Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin
No.
Symbol
I/O
Standard pin
voltage
Equivalent circuit
Description
VREF
6
PFC_CS
I
VREF to GND
6
PFC current sense input
(Connect to the detection
side of current sense
resistor)
Pch
GND
VREF
Pch
Pch
7
PFC_VAO
O
3.2V to GND
7
Pch
Nch
Nch
PFC voltage control error
amplifier output
(Connect a phase
compensation circuit:
between PFC_VAO and
GND)
GND
VREF
Pch
8
PFC_
VSENSE
I
VREF to GND
During
steadystate:
2.5V
8
Pch
PFC output voltage sense
input
(Connect to PFC output
detection resistor)
GND
VREF
Pch
9
PFC_OVP
I
VREF to GND
During
steadystate:
2.5V
Pch
Pch
9
PFC output overvoltage
sense input
(Connect to PFC output
detection resistor)
Nch
GND
VREF
Pch
10
PFC_
TONMAX
I/O
3.2V to GND
10
Pch
PFC maximum ON time
control
(Connect to ON time
control capacitor)
Nch
GND
-7Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin
No.
Symbol
I/O
Standard pin
voltage
Equivalent circuit
Description
VREF
11
RM_OFFADJ
I
VREF to GND
11
Resonant controller stop
voltage adjustment and
abnormal latch input
Pch
GND
VREF
Nch
12
RM_FMIN
I
1.2V
12
Pch
Resonant controller
minimum frequency
setting
(Connect to minimum
frequency control resistor)
GND
VREF
Nch
13
RM_SS
I/O
VREF to GND
During
steadystate:
2.5V
Pch
13
Pch
Resonant controller soft
start and overcurrent
timer-latch setting
(Connect to the capacitor
for soft start)
Nch
GND
VREF
14
RM_CS2
II
VREF to
–0.3V
14
Pch
Resonant controller
overcurrent sense input
(Connect to the resistor for
current detection)
GND
VREF
Pch
15
RM_CS1
I
VREF to
–0.3V
15
Pch
Resonant controller
overcurrent sense input
(Connect to the resistor for
current detection)
GND
-8Free Datasheet http://www.datasheet4u.com/
CXA3810M
Pin
No.
Symbol
I/O
Standard pin
voltage
Equivalent circuit
Description
VREF
Pch
Pch
16
RM_RT
I
Pch
Pch
Resonant controller
frequency control
(Connect to the photo
coupler for output
feedback)
(3.5V)
16
GND
VCC
Nch
17
VREF
O
5.0V
17
Pch
Nch
Internal supply voltage
output
(Connect to the capacitor
for stabilization)
Nch
GND
18
GND
—
—
—
GND
19
VCC
—
—
—
Power supply input
20
B_OK
O
VCC
PFC-OK signal output
VREF
Pch
VCC to GND
Pch
20
22
22
AC_DETOUT
Nch
Nch
O
AC off detect signal output
GND
Resonant controller Lowside MOSFET driver
output
(Connect to the drive
transformer)
VCC
21
RM_OUTN
O
Pch
VCC to GND
21
Nch
23
RM_OUTP
O
GND
23
Resonant controller Highside MOSFET driver
output
(Connect to the drive
transformer)
-9Free Datasheet http://www.datasheet4u.com/
CXA3810M
Electrical Characteristics
Shared Blocks
(Unless otherwise specified, the conditions are Ta = 27[C], VCC = 12[V], MODE1 = GND, MODE2 = GND)
1. Current Consumption (VCC and PVCC pins)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Current consumption
in standby mode
Istb
MODE = VCC
—
700
1000
A
Current consumption
in operation mode
Iact
AC_DETIN = 1.0V,
PFC_VSENSE = 1.0V
* Non Switching
—
3.0
3.5
mA
Min.
Typ.
Max.
Unit
2. Under Voltage Lock Out Circuit Block (VCC pin)
Item
Symbol
Measurement conditions
Turn-on voltage
Vact
10.2
11.0
11.8
V
Turn-off voltage
Voff
9.0
9.6
10.2
V
Hysteresis
Vact-Voff
1.1
1.4
1.7
V
Min.
Typ.
Max.
Unit
4.85
5.00
5.15
V
Vact – Voff
3. Reference Voltage Output Circuit Block (VREF pin)
Item
Symbol
Measurement conditions
Output voltage
Vvref
Input stability
Vline
VCC = 10.5V to 18V
—
10
30
mV
Load stability
Vload
Iload = 0.1mA to 5mA
—
20
50
mV
Pin voltage when NG
latch (When TSD)
Vvrefng
Iout = 10mA
(Design guarantee)
—
0.1
0.5
V
4. AC Input Detection Circuit Block (AC_DETIN pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
PFC operation start
and stop voltage
Vpfcon
AC_DETIN peak voltage (rise)
1.80
1.85
1.90
V
Vpfcoff
AC_DETIN peak voltage (fall)
1.60
1.65
1.70
V
Hysteresis
Vpfchys
Vpfcon – Vpfcoff
0.17
0.20
0.23
V
AC detection
reference voltage
High 1
Vthach1
AC_VRMS = 7.5V
4.675
4.875
5.075
V
AC detection
reference voltage
High 2
Vthach2
AC_VRMS = 2.0V
1.1
1.3
1.5
V
AC off detection delay
time
Tdlyacoff
AC_DETIN & lt; AC_VRMS 65%
(State B)
6.4
8
9.6
ms
AC recovery
detection delay time
Tdlyacon
AC_DETIN & gt; AC_VRMS 65%
(State C)
8
10
12
ms
- 10 F r e e
D a t a s h e e t
h t t p : / /
CXA3810M
5. AC Off Detect Signal Output Circuit Block (AC_DETOUT pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Output Low voltage
Vacoutl
VCC = 18V, Iout = 10mA
—
0.5
1.0
V
Output High voltage
Vacouth
VCC = 18V, Iout = –10mA
17.0
17.5
—
V
Min.
Typ.
Max.
Unit
6. MODE Pin Voltage Detection Circuit Block (MODE1, MODE2 pin)
Item
Symbol
Measurement conditions
MODE detection
voltage Low
Vmodel
5.2
—
5.6
V
MODE detection
voltage High
Vmodeh
7.6
—
8.4
V
Internal pull-up
resistor value
Rmode
35
50
65
k
Min.
Typ.
Max.
Unit
972
1024
1075
s
MODE = 0.1V
7. Clock Timer
Item
1ms clock
Symbol
Measurement conditions
Tclock
- 11 Free Datasheet http://www.datasheet4u.com/
CXA3810M
PFC Block
(Unless otherwise specified, the conditions are Ta = 27[C], VCC = 12[V], MODE1 = GND, MODE2 = GND)
8. PFC Output Circuit Block (PFC_OUT pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Output Low voltage
Vpoutl
VCC = 18V, Iout = 10mA
—
0.03
0.1
V
Output High voltage
Vpouth
VCC = 18V, Iout = –10mA
17.85
17.9
—
V
Rise time*1
Tpoutr
VCC = 18V, CLOAD = 1000pF
—
35
100
ns
Fall time*1
Tpoutf
VCC = 18V, CLOAD = 1000pF
—
25
100
ns
Min.
Typ.
Max.
Unit
*1
Rise time and fall time use VCC 0.1 to VCC 0.9 as the judgment voltages.
9. PFC-OK Signal Circuit Block (B_OK pin)
Item
Symbol
Measurement conditions
Output Low voltage
Vacoutl
VCC = 18V, Iout = 10mA
—
0.5
1.0
V
Output High voltage
Vacouth
VCC = 18V, Iout = –10mA
17.0
17.5
—
V
Min.
Typ.
Max.
Unit
10. AC Peak Voltage Sense Circuit Block (AC_VRMS pin)
Item
Symbol
Measurement conditions
Internal pull-down
resistor value
Rvrms
AC_VRMS = 1.0V
0.8
1.0
1.2
M
AC off discharge
resistor value
Rvrmsdchg
AC_VRMS = 7.0V
104
130
156
k
Sag recovery
operation switching
voltage
Vthsag
4.950
5.100
5.250
V
Min.
Typ.
Max.
Unit
11. PFC Overcurrent Detection Circuit Block (PFC_CS pin)
Item
Symbol
Measurement conditions
Overcurrent detection
voltage1
Vthcs1
AC_VRMS = 1.65V
0.365
0.400
0.435
V
Overcurrent detection
voltage2
Vthcs2
AC_VRMS = 2.55V
0.365
0.400
0.435
V
Power limit detection
voltage1
VthDPL1
AC_VRMS = 2.55V
0.439
0.488
0.537
V
Power limit detection
voltage2
VthDPL1
AC_VRMS = 6.0V
0.216
0.240
0.264
V
Blanking time
Tleb
PFC_CS = 1.0V
200
250
300
ns
Delay time
Tcsdly
CS to DRV
PFC_CS = 0V 1V
(Rectangular waveform input)
100
150
200
ns
- 12 Free Datasheet http://www.datasheet4u.com/
CXA3810M
12. PFC Zero Current Detection Circuit Block (PFC_ZCD pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
1.2
1.3
1.4
V
Input threshold voltage
Vthzcd
Hysteresis
Vzcdhys
180
200
220
mV
Clamp High voltage
Vclph
I = 3mA
4.0
4.4
5.0
V
Clamp Low voltage
Vclpl
I = –3mA
0.3
0.6
1.0
V
Restart timer delay
Tstart
180
200
220
s
Minimum off time
(During overcurrent
detection)
Toffmin
PFC_CS = 1.0V
3.32
4.00
4.73
s
Blanking time
Tteb
(Design guarantee)
(384)
(480)
(576)
ns
13. Error Amplifier Output Circuit Block for PFC Voltage Control (PFC_VAO pin)
Item
Trans-conductance
Output High clamp
voltage
Symbol
Vvaogm
Measurement conditions
(Design guarantee)
Min.
—
Typ.
(90)
Max.
—
Unit
A/V
Vvaoh
PFC_VSENSE = 2.0V
3.1
3.3
3.5
V
85
90
95
%
75
80
85
%
65
70
75
%
55
60
65
%
45
50
55
%
35
40
45
%
10
20
40
A
0
—
0.2
V
5
15
25
A
Power limit clamp
voltage ratio1
Vvao1
Power limit clamp
voltage ratio2
Vvao2
Power limit clamp
voltage ratio3
Vvao3
Power limit clamp
voltage ratio4
Vvao4
Power limit clamp
voltage ratio5
Vvao5
Power limit clamp
voltage ratio6
Vvao6
Source current
Ivaosc
Output Low voltage
Vvaol
Sink current
Ivaosk
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.0V
Voltage ratio to internal
reference voltage
(typ.3.0V) to determine
PFC max. ON time
PFC_VSENSE = 2.2V,
PFC_VAO = 0.5V
PFC_VSENSE = 2.55V
PFC_VSENSE = 2.65V,
PFC_VAO = 3.0V
- 13 Free Datasheet http://www.datasheet4u.com/
CXA3810M
14. PFC Maximum ON Time Control Circuit Block (PFC_TONMAX pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
—
—
150
ns
Discharge time
Tdischg
Ct = 470pF
PFC_TONMAX = 3.3V to 0.1V
PFC output ON time1
Ton1
PFC_VSENSE = 2.0V,
AC_VRMS = 2.5V
Ct = 470pF
25.74
27.68
29.62
s
PFC output ON time2
Ton2
PFC_VSENSE = 2.0V,
AC_VRMS = 5.0V
Ct = 470pF
6.38
7.09
7.80
s
Min.
Typ.
Max.
Unit
15. PFC Output Voltage Detection Circuit Block (PFC_VSENSE pin)
Item
Symbol
Measurement conditions
PFC stop voltage
Vovp2
2.659
2.7
2.742
V
PFC stop cancel
voltage
Vovp2hys
2.548
2.6
2.652
V
PFC control voltage
Vpfccnt
2.475
2.5
2.525
V
PFC non-operating
detection voltage and
B_OK High level
threshold
Vpfcnonact
2.280
2.4
2.520
V
B_OK Low level
threshold
Vpfcbokl
2.254
2.3
2.346
V
Resonant controller
operation start
voltage
Vrmstart
2.100
2.143
2.186
V
Resonant controller
operation stop
voltage
Vrmstop
1.789
1.883
1.977
V
PFC stop voltage
during active standby
Vasovp
1.654
1.688
1.722
V
PFC stop cancel
voltage during active
standby
Vasovphys
1.523
1.554
1.585
V
Resonant operation
voltage during active
standby
Vasrmen
1.390
1.419
1.448
V
Pin short-circuit
detection
Vshort
0.2
0.3
0.4
V
Pull-up current
Ivs
0.05
0.1
0.2
A
RM_OFFADJ = 1.883V
PFC_VSENSE = 0.1V
16. Resonant Controller Stop Voltage Adjustment Circuit Block (RM_OFFADJ pin)
Item
Latch voltage for
external error
detection
Symbol
Measurement conditions
Typ.
Max.
Unit
3.8
Voffadjng
Min.
4.0
4.2
V
- 14 Free Datasheet http://www.datasheet4u.com/
CXA3810M
17. PFC Overvoltage Detection Circuit Block (PFC_OVP pin)
Item
Symbol
PFC overvoltage
detection voltage
Iovp
PFC_VSENSE = 0.1V
Min.
Typ.
Max.
Unit
2.857
Vovp11
Pull-up current
Measurement conditions
2.922
2.981
V
0.05
0.1
0.2
A
- 15 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Resonant Controller Block
(Unless otherwise specified, the conditions are Ta = 27[C], VCC = 12[V], MODE1, 2 = GND, RM_RT = OPEN,
Rfmin = 120k)
18. Resonant Controller Output Circuit Block (RM_OUTP, RM_OUTN pins)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Output Low voltage
Vroutl
VCC = 18V, Iout = 10mA
—
0.05
0.1
V
Output High voltage
Vrouth
VCC = 18V, Iout = –10mA
17.9
17.95
—
V
Rise time*1
Vroutr
VCC = 18V, CLOAD = 1000pF
—
35
100
ns
Fall time*1
Vroutf
VCC = 18V, CLOAD = 1000pF
—
35
100
ns
*1
Rise time and fall time use VCC 0.1 to VCC 0.9 as the judgment voltages.
19. Resonant Controller Soft Start Circuit Block (RM_SS pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Soft start current1
Irmss1
RM_SS = 0V
7.5
10
12.5
A
Soft start current2
Irmss2
RM_SS = 0V,Active STBY
(MODE1 = GND,
MODE2 = VCC)
4.69
6.25
7.81
A
Clamp voltage
Vrmss
2.3
2.5
2.7
V
Overcurrent timer
latch detection
voltage
Vtimerlatch
3.8
4.0
4.2
V
Charging current
during overcurrent
detection
Iocc
3.2
5.0
6.8
A
Min.
Typ.
Max.
Unit
800
—
—
kHz
270
300
330
ns
3.5
4.0
4.5
times
RM_CS = 0.3V, SS = 3.0V
20. Resonant Controller Frequency Control Circuit Block (RM_RT pin)
Item
Symbol
Maximum oscillation
frequency
Frmmax
Deadband width
Measurement conditions
Tdb
Multiple number of
clamp frequency
when soft star
Fclamp
Irt = 2mA, Rfmin = 39k
f0/f4
(f0:RM_SS = 0V, f4:RM_SS =
open)
Rfmin = 390k
21. Resonant Controller Minimum Frequency Adjustment Circuit Block (RM_FMIN pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Setting frequency 1
Fmin1
Rfmin = 390k
–3%
46.1
+3%
kHz
Setting frequency 2
Fmin2
Rfmin = 120k
–4%
96.7
+4%
kHz
Setting frequency 3
Fmin3
Rfmin = 39k
–5%
144.1
+5%
kHz
Low current detection
threshold
Ifminlow
0.85
1.25
1.65
A
- 16 Free Datasheet http://www.datasheet4u.com/
CXA3810M
22. Resonant Controller Current Detection Circuit Block (RM_CS1 pin)
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Positive side
detection
Vcs1p
When RM_OUTP = High
0.209
0.220
0.231
V
Negative side
detection
Vcs1n
When RM_OUTN = High
–0.295
–0.260
–0.235
V
Detection delay time
Tcsdly
CS to DRV
RM_CS = –0.3V 0.3V
(Rectangular input)
100
150
200
ns
Detection mask time
Tcsmask
RM_CS = 0.3V
384
480
576
ns
Overcurrent detection
voltage ratio when +B
falls
Rrmocp
VSENSE & lt; 2.143V
10
15
20
%
RM_CS1 pin offset
current
Ics1ofs
RM_CS1 = 0.1V
6.6
9.5
12.5
A
Min.
Typ.
Max.
Unit
23. Resonant Controller Current Detection Circuit Block (RM_CS2 pin)
Item
Symbol
Measurement conditions
Continuous load
detection voltage
Vcs2
When RM_OUTP = High
0.158
0.175
0.193
V
Detection mask time
Tcsmask
(RM_CS = 0.3V)
(384)
(480)
(576)
ns
Continuous load
detection time
Tcs2
(When the time corresponds to
2.1s 5 times)
RM_CS2 pin offset
current
Ics2ofs
RM_CS2 = 0.1V
(10)
–1.0
0
s
1.0
A
Note) The shipping inspection is performed at room temperature. (The design is guaranteed with respect
to temperature fluctuation.)
- 17 Free Datasheet http://www.datasheet4u.com/
CXA3810M
24. List of Electrical Characteristics
Specification ratings
(Ta = 27C)
Item
Design guarantee ratings
(Ta = –25 to +85C) (*1)
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Current consumption in standby mode
—
700
1000
—
700
1000
A
Current consumption in operation mode
—
3.0
3.5
—
3.0
3.5
mA
Current consumption (VCC, PVCC pins)
Low voltage misoperation prevention circuit block (VCC pin)
Operation start voltage
10.2
11.0
11.8
10.2
11.0
11.8
V
Operation stop voltage
9.0
9.6
10.2
9.0
9.6
10.2
V
Hysteresis width
1.1
1.4
1.7
1.1
1.4
1.7
V
4.85
5.00
5.15
4.85
5.00
5.15
V
mV
Reference voltage output block (VREF pin)
Output voltage
Input stability
—
10
30
0
10
30.5(*2)
Load stability
—
20
50
—
20
50
mV
Pin voltage when NG latch (When TSD)
—
0.1
0.5
—
0.1
0.5
V
1.80
1.85
1.90
1.80
1.85
1.90
V
1.60
1.65
1.70
1.60
1.65
1.70
V
Hysteresis width
0.17
0.2
0.23
0.17
0.2
0.23
V
AC detection reference voltage High 1
4.675
4.875
5.075
4.675
4.875
5.075
V
AC detection reference voltage High 2
1.1
1.3
1.5
1.1
1.3
1.5
V
AC off detection delay time
6.4
8
9.6
6.4
8
9.6
ms
8
10
12
8
10
12
ms
AC input detection circuit block (AC_DETIN pin)
PFC operation start voltage
AC recovery detection delay time
AC input error detection output circuit block (AC_DETOUT pin)
Output Low voltage
—
0.5
1
—
0.5
1
V
Output High voltage
17
17.5
—
17
17.5
—
V
Mode pin determination circuit block (MODE1, MODE2 pin)
MODE detection voltage Low
5.2
—
5.6
5.2
—
5.6
V
MODE detection voltage High
7.6
—
8.4
7.6
—
8.4
V
Internal pull-up resistor value
35
50
65
35
50
65
k
972
1024
1075
972
1024
1075
s
Output Low voltage
—
0.03
0.1
—
0.03
0.1
V
Output High voltage
17.85
17.9
—
17.85
17.9
—
V
Rise time
—
35
100
—
35
100
ns
Fall time
—
25
100
—
25
100
ns
Output Low voltage
—
0.5
1
—
0.5
1
V
Output High voltage
17
17.5
—
17
17.5
—
V
Clock timer
1ms clock
PFC output circuit block (PFC_OUT pin)
PFC-OK signal circuit block (PFC_OK pin)
- 18 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Item
Specification ratings
(Ta = 27C)
Min.
Typ.
Design guarantee ratings
(Ta = –25 to +85C) (*1)
Max.
Min.
Typ.
Unit
Max.
AC peak voltage monitor circuit block (AC_VRMS pin)
Internal pull-down resistor value
0.8
1.0
1.2
0.8
1.0
1.2
M
AC off discharge resistor value
104
130
156
104
130
156
k
Sag recovery automatic switching voltage
4.95
5.10
5.25
4.95
5.10
5.25
V
ZCD protection disable voltage
7.14
7.29
7.44
7.14
7.29
7.44
V
PFC overcurrent detection circuit block (PFC_CS pin)
Overcurrent detection voltage1
0.365
0.4
0.435
0.365
0.4
0.435
V
Overcurrent detection voltage2
0.365
0.4
0.435
0.365
0.4
0.435
V
Power limit detection voltage1
0.439
0.488
0.537
0.439
0.488
0.537
V
Power limit detection voltage2
0.216
0.24
0.264
0.216
0.24
0.264
V
Blanking time
200
250
300
200
250
300
ns
Delay time
100
150
200
100
150
200
ns
PFC zero current detection circuit block (PFC_ZCD pin)
Input threshold voltage
1.2
1.3
1.4
1.2
1.3
1.4
V
Hysteresis width
180
200
220
180
200
220
mV
Clamp High voltage
4
4.4
5
4
4.4
5
V
Clamp Low voltage
0.3
0.6
1
0.3
0.6
1
V
Restart timer delay
180
200
220
180
200
220
s
Minimum off time
(When overcurrent is detected)
3.32
4.00
4.73
3.32
4.00
4.73
s
Blanking time
(384)
(480)
(576)
(384)
(480)
(576)
ns
Error amplifier output circuit block for PFC voltage control (PFC_VAO pin)
A/V
Trans-conductance
—
(90)
—
(90)
Output High clamp voltage
3.1
3.3
3.5
3.1
3.3
3.5
V
Power limit clamp voltage ratio1
85
90
95
85
90
95
%
Power limit clamp voltage ratio2
75
80
85
75
80
85
%
Power limit clamp voltage ratio3
65
70
75
65
70
75
%
Power limit clamp voltage ratio4
55
60
65
55
60
65
%
Power limit clamp voltage ratio5
45
50
55
45
50
55
%
Power limit clamp voltage ratio6
35
40
45
35
40
45
%
Source current
10
20
40
10
20
40
A
Output Low voltage
0
—
0.2
0
—
0.2
V
Sink current
5
15
25
5
15
25
A
PFC maximum ON time control circuit block (PFC_TONMAX pin)
Discharge time
—
—
150
—
—
150
ns
ON time1
25.74
27.68
29.62
25.74
27.68
29.62
s
ON time2
6.38
7.09
7.80
6.38
7.09
7.80
s
- 19 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Item
Specification ratings
(Ta = 27C)
Min.
Typ.
Max.
Design guarantee ratings
(Ta = –25 to +85C) (*1)
Min.
Typ.
Unit
Max.
PFC output voltage detection circuit block (PFC_VSENSE pin)
PFC stop voltage
2.659
2.7
2.742
2.657
2.7
2.744
V
PFC stop cancel voltage
2.548
2.6
2.652
2.548
2.6
2.652
V
PFC control voltage
2.475
2.5
2.525
2.475
2.5
2.525
V
PFC non-operating detection voltage
and B_OK High level threshold
2.28
2.4
2.52
2.28
2.4
2.52
V
B_OK Low level threshold
2.254
2.3
2.346
2.254
2.3
2.346
V
Resonant controller operation start
voltage
2.100
2.143
2.186
2.100
2.143
2.186
V
Resonant controller operation stop
voltage
1.789
1.883
1.977
1.789
1.883
1.977
V
PFC stop voltage during active standby
1.654
1.688
1.722
1.654
1.688
1.722
V
PFC stop cancel voltage during active
standby
1.523
1.554
1.585
1.523
1.554
1.585
V
Resonant operation voltage during
active standby
1.390
1.419
1.448
1.390
1.419
1.448
V
Pin short-circuit detection
0.2
0.3
0.4
0.2
0.3
0.4
V
Pull-up current
0.05
0.1
0.2
0.05
0.1
0.2
A
Resonant controller stop voltage adjustment circuit block (RM_OFFADJ pin)
Latch voltage for external error
detection
3.8
4
4.2
3.8
4
4.2
V
PFC overvoltage detection circuit block (PFC_OVP pin)
PFC overvoltage detection voltage
2.857
2.922
2.981
2.855
2.922
2.983
V
Pull-up current
0.05
0.1
0.2
0.05
0.1
0.2
A
Resonant controller output circuit block (RM_OUTP, RM_OUTN pins)
Output Low voltage
—
0.05
0.1
—
0.05
0.1
V
Output High voltage
17.9
17.95
—
17.9
17.95
—
V
Rise time
—
35
100
—
35
100
ns
Fall time
—
35
100
—
35
100
ns
Resonant controller soft start circuit block (RM_SS pin)
Soft start current1
7.5
10
12.5
7.5
10
12.5
A
Soft start current2
4.69
6.25
7.81
4.69
6.25
7.81
A
Clamp voltage
2.3
2.5
2.7
2.3
2.5
2.7
V
Overcurrent timer latch detection
voltage
3.8
4
4.2
3.8
4
4.2
V
Charging current during overcurrent
detection
3.2
5.0
6.8
3.2
5.0
6.8
A
- 20 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Item
Specification ratings
(Ta = 27C)
Min.
Typ.
Design guarantee ratings
(Ta = –25 to +85C) (*1)
Max.
Min.
Typ.
Unit
Max.
Resonant controller soft start circuit block (RM_RT pin)
Maximum oscillation frequency
800
—
—
800
—
—
kHz
Deadband width
270
300
330
270
300
330
ns
Multiple number of clamp frequency
when soft star
3.0
3.5
4.0
3.0
3.5
4.0
time
s
Resonant controller minimum frequency adjustment circuit block (RM_FMIN pin)
Setting frequency 1
–3.0%
46.1
+3%
–3.8%(*2)
46.1
+3.0%(*2)
kHz
Setting frequency 2
–4.0%
96.7
+4%
–4.7%(*2)
96.7
+4.0%(*2)
kHz
144.1
+5.0%(*2)
kHz
Setting frequency 3
Constant current detection threshold
–5.0%
144.1
+5.0%
–5.6%(*2)
0.85
1.25
1.65
0.85
1.25
1.65
A
Resonant controller current detection circuit block (RM_CS1 pin)
Positive side detection
0.209
0.22
0.231
0.209
0.22
0.231
V
Negative side detection
–0.295
–0.26
–0.235
–0.295
–0.26
–0.235
V
Detection delay time
100
150
200
100
150
200
ns
Detection mask time
384
480
576
384
480
576
ns
Overcurrent detection voltage ratio
when +B falls
10
15
20
10
15
20
%
RM_CS1 pin offset current
6.6
9.5
12.5
6.6
9.5
12.5
A
Resonant controller current detection circuit block (RM_CS2 pin)
Continuous load detection voltage
0.158
0.175
0.193
0.158
0.175
0.193
V
Detection mask time
(384)
(480)
(576)
(384)
(480)
(576)
ns
—
(10)
—
–1.0
0
1.0
Continuous load detection time
RM_CS2 pin offset current
*1
*2
(10)
–1.0
0
s
1.0
A
Ratings are design guarantee values within this temperature range.
Specification values at room temperature may not be satisfied because of temperature dependence.
- 21 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Detailed Description of Each Block
Common Circuit Block
1. Misdetection Prevention Circuit
Comp out
D
Q
CK Q
D
Q
CK Q
D
Q
S Q
CK Q
Q
R Q
CLK
CLK
Comp out
Q
Fig. 1. Equivalent Circuit of 1 ms 3 times-Sampling Chatter Filter
Fig. 1 above shows the equivalent circuit of 1 ms 3 times-sampling chatter filter.
When CLK has a 1 ms cycle, Comp out is monitored at the rising edge of every 1 ms, and the output Q is
defined when it reaches three times. The other chatter filters also operate using a similar circuit.
The clocks used for each setup time are generated by frequency dividing the 1 MHz clock. The setup time
variance of the 1 ms 3 times chatter filter in the example above is as follows. Variance of 2 ms & lt; setup time
& lt; 3 ms occurs due to the Comp out inversion timing. In addition, taking into account the basic clock 1 kHz
variance, the 1 ms (1024 s) clock has variance of 0.972 ms to 1.075 ms (5 %), so at the maximum variance
the setup time variance is 1.944 ms & lt; setup time & lt; 3.225 ms.
Setup time of misdetection prevention counter (when the basic clock of 1MHz has no variance) used for this
IC is shown below.
Corresponds to 1s 4 times......................................3s to 4s
Corresponds to 4s 3 times......................................8s to 12s
Corresponds to 16s 3 times....................................32s to 48s
Corresponds to 32s 3 times....................................64s to 86s
Corresponds to 128s 3 times..................................256s to 384s
Corresponds to 128s 5 times..................................512s to 640s
Corresponds to 1ms 3 times.....................................2ms to 3ms (Converted by 1ms for 1.024ms)
Corresponds to 1ms 5 times.....................................4ms to 5ms
Corresponds to 8ms 6 times.....................................40ms to 48ms (Converted by 8ms for 8.192ms)
Corresponds to 66ms 8 times...................................462ms to 528ms (Converted by 66ms for 65.5ms)
Corresponds to 2.1s 3 times......................................4.2s to 6.3s (Converted by 2.1s for 2.097s)
Corresponds to 2.1s 5 times......................................8.4s to 10.5s
- 22 Free Datasheet http://www.datasheet4u.com/
CXA3810M
2. AC Detection Circuit Block
Fig. 2-1 shows the AC detection block equivalent circuit.
R1
AC_DETIN
R2
C1
AC_VRMS
65%
AC_65
Vth1
Logic
AC_DETOUT
VRMS_OK
1.85V/1.65V
Fig. 2-1. AC Detection Block Equivalent Circuit
The AC detection circuit block detects the AC input voltage by directly monitoring the full-wave rectified AC
input waveform. The wave input to the AC_DETIN pin is peak-held at the AC_VRMS pin by a buffer circuit, and
reference voltages equivalent to 65% (Vth1) of the peak value are generated internally. The AC input is
constantly monitored to determine the voltage range by comparing these reference voltages and the
AC_DETIN pin voltage. The AC_VRMS pin voltage is compared with the internal reference voltages, and AC
input is detected when the AC_VRMS pin voltage is 1.85V or more, or AC OFF when 1.65V or less. When R1
= 1320k and R2 = 27k in Fig. 2-1, AC input is detected when VAC = 65.3Vrms or more. In addition, connect
a capacitor of at least 0.47F or more to the AC_VRMS pin.An internal resistor is provided to generate the 65%
voltages of the AC_VRMS pin voltage, and when this external capacitance value is too small, discharge may
make peak hold impossible.
- 23 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Fig. 2-2 shows the state transition diagram for the AC OFF detection circuit. The state transition conditions are
related to the POR, AC65 and VRMSOK input signals, and the timer values in each state. POR is the IC reset
signal, and AC65 and VRMSOK are the outputs of each comparator shown in Fig. 2-1. 4s 3 times filter
processing is applied to these signals.The state transition logic operating frequency is 7.8kHz. In addition,
regardless of the state transitions shown in Fig. 2-2, VRMSOK2 = High (AC_VRMS pin voltage & gt; 1.85V) must
be set up to obtain AC_DETOUT = High output at start-up. After VRMSOK2 = High is detected (1ms 3 times),
AC_DETOUT goes High.
ou
t
VRMSOK = L
e
tim
s
VRMSOK = H
VRNG
AC_DETOUT = H
1
VRMSOK = 0
AC_DETOUT = L
NG
AC_DETOUT = L
POR = L
AC_DETOUT = L
AC_DETOUT = H
=
VRMSOK = L
12ms time out
B
AC80 = H
80
VRMSOK = H
AC_DETOUT = H
AC80 = L
C
AC
INIT
AC65 = 1
after 12ms wait
8m
WAIT
RESET
POR = H
non sync
ANY
State
AC_DETOUT = L
Fig. 2-2. AC Detection State Transition Diagram
The AC_DETOUT pin is the output signal for this function, and outputs High when the AC input state is normal,
or Low when AC OFF or other abnormal state is detected. Changing “L” to “H” of AC_DETOUT pin requires
detecting " C " period one time or remaining in " C " period 10ms or more.
- 24 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Fig. 2-3 shows an image of the state transitions when normal AC input continues.
AC_DETIN
65%
8ms
8ms
AC65
Logic state
AC_DETOUT
B
C
B
C
B
H
Fig. 2-3. AC_DETIN Input Waveform and State Transitions
In Fig. 2-3, the internal logic signal transitions as follows.
When the AC input rises to 65% or more within 8ms after the state transitions to " B " , the state transitions
to " C " .
When the AC input falls to 65% or less after the state transitions to " C " , the state transitions to " B " .
When the above cycle repeats, AC_DETOUT continues to output High.
Other behaviors during start-up or AC voltage OFF are described on the following pages.
- 25 Free Datasheet http://www.datasheet4u.com/
CXA3810M
During normal start-up
AC_DETIN
65%
VDD
POR
AC_VRMS
1.85V
12ms
Logic state
AC_DETOUT
RESET
WAIT
INIT
L
C
B
C
B
H
t2
t1
When POR is canceled after power-on, the state transitions to " INIT " . AC_DETOUT is Low output in
the " RESET " and " INIT " states.
When the AC_VRMS pin voltage rises to 1.85V or more in the " INIT " state, the state transitions to
" WAIT " (t1).
When the AC_DETIN pin voltage exceeds 65% of the AC_VRMS pin voltage after 12ms have elapsed
in the " WAIT " state, the state transitions to " C " (t2) and the normal state judgment cycle starts.
- 26 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Start-up when the AC voltage is low
AC_DETIN
1.85V
(VAC = 65Vrms)
VDD
POR
AC_VRMS
1.85V
12ms
Logic state
RESET
INIT
WAIT
VRNG
B
B
H
AC_DETOUT
t1
t2
t3
When the AC_VRMS pin voltage does not reach 1.85V within 12ms in the " INIT " state after POR is
canceled, an AC input error is judged, the state transitions to " VRNG " , and AC_DETOUT continues to
output Low (t1).
When the IC detects that the AC_VRMS pin voltage has risen to 1.85V or more in the " VRNG " state,
the state transitions to " WAIT " (t2).
When the IC detects " C " period after 12ms has passed in the " WAIT " state, AC_DETOUT = “H” output
is setup (t3).
- 27 Free Datasheet http://www.datasheet4u.com/
CXA3810M
When AC OFF occurs in the " WAIT " state (1)
AC_DETIN
AC OFF
65%
VDD
POR
AC_VRMS
1.85V
Logic state
RESET
INIT
WAIT
VRNG
L
AC_DETOUT
t1
When the AC_VRMS pin voltage falls to 1.85V or less in the " WAIT " state, AC OFF is judged, the state
transitions to " VRNG " (t1). In this case, the AC_DETOUT pin does not output “H” because " C " period
is not detected.
When AC OFF occurs in the " WAIT " state (2)
AC_DETIN
AC OFF
65%
AC_VRMS
1.85V
25ms
Logic state
AC_DETOUT
WAIT
INIT
NG
L
When the AC_VRMS pin voltage is 1.85V or more but the AC_DETIN pin voltage has not reached
65% of the AC_VRMS pin voltage (the state has not transitioned to " C " ) within 25ms after the state
transitions to " WAIT " , AC OFF is judged, the state transitions to " NG " , and the AC_DETOUT outputs
Low.In this case, the AC_DETOUT pin does not output High because " C " period is not detected.
- 28 Free Datasheet http://www.datasheet4u.com/
CXA3810M
During normal AC input
AC_DETIN
65%
8ms
AC65
Logic state
AC_DETOUT
B
C
B
B
C
H
When the AC_DETIN pin voltage rises to 65% or more of the AC_VRMS pin voltage within 8ms after
the state transitions to " B " , the state transitions to " C " .
AC_DETOUT continues to output High even if AC_DETIN voltage does not decrease to 0V when the
state continues to repeat the cycle of “C” “B” “C”.
AC OFF in the " B " state
AC_DETIN
AC OFF
65%
8ms
AC65
C
Logic state
AC_DETOUT
H
B
NG
L
When the AC_DETIN pin voltage does not rise to 65% or more of the AC_VRMS pin voltage within
8ms after the state transitions to " B " , AC OFF is judged, the state transitions to " NG " , and
AC_DETOUT outputs Low.
AC OFF in the " C " state
When the AC_DETIN pin voltage does not fall to 65% or less of the AC_VRMS pin voltage after the
state transitions to " C " , AC OFF is not judged and the AC_DETOUT continues to output High. In other
words, AC OFF is not judged in the " C " state.
AC OFF in the " C " state is judged after the AC_DETIN pin voltage falls to 65% or less of the AC_VRMS
pin voltage and the state transitions to " B " or the AC_VRMS pin voltage falls to 1.85V or less.
- 29 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Return to the normal cycle from the " NG " state (1)
AC_DETIN
65%
AC_VRMS
1.85V
AC65
Logic state
NG
AC_DETOUT
C
L
C
B
B
H
t1
When the AC_DETIN pin voltage rises to 65% or more of the AC_VRMS pin voltage while the
AC_VRMS pin voltage is 1.85V or more in the " NG " state, the state transitions to " C " , the
AC_DETOUT outputs High (t1), and the normal state judgment cycle starts.
Return to the normal cycle from the " NG " state (2)
AC_DETIN
65%
AC_VRMS
1.85V
AC65
12ms
Logic state NG
AC_DETOUT
VRNG
WAIT
L
C
B
C
B
H
When the AC_VRMS pin voltage falls to 1.85V or less in the " NG " state, the state transitions to
" VRNG " .
When AC is input again and the AC_VRMS pin voltage rises to 1.85V or more, the state transitions to
" WAIT " , Then, when the AC input rises to 65% or more the state transitions to " C " . After that, the
AC_DETOUT = High output is setup and the normal state judgment cycle starts.
- 30 Free Datasheet http://www.datasheet4u.com/
CXA3810M
AC_VRMS pin discharge function in the " NG " state
8ms
C
Logic state
C
B
NG
B
L
H
t1
C
B
H
t2
This IC has a function of discharging the AC_VRMS pin in the " NG " state in order to return quickly to
the state of the AC_DETOUT = “H” when AC OFF is detected because AC input voltage is changed
rapidly.
When 8ms or more has passed after the state transitions to " B " , the state transitions to " NG " and starts
discharge of the AC_VRMS pin (t1).
Discharge of the AC_VRMS pin continues till the AC_DETIN pin voltage exceeds 65% of the
AC_VRMS pin voltage (t2) or the AC_VRMS pin voltage falls to 1.85V or less.
When the AC_DETIN pin voltage exceeds 65% of the AC_VRMS pin voltage, the state transitions to
" C " . and the AC_DETOUT outputs High (t2) and the normal state judgment cycle starts.
- 31 Free Datasheet http://www.datasheet4u.com/
CXA3810M
3. MODE1, MODE2 Pin Voltage Detection Circuit Block
Four normal mode of standby mode, sequence start-up mode, rapid start-up mode and active standby mode
can be set in accordance with the MODE pin input voltage.In addition, this IC has two test modes used to set
the minimum resonant controller and to check PFC overcurrent point. The table below shows MODE1, MODE2
pin voltage setting and mode transition setup time in each mode.
MODE1
pin
MODE2
pin
VCC or
OPEN
VCC or
OPEN
Standby mode
Standby mode
ACDET enable/PFC OFF/Resonant controller
OFF
32s 3
times
GND
GND
Sequence start-up
mode
Sequence start-up mode same as CXA3809
After +B & gt; 330V is detected, resonant controller
starts up by 8ms 6 times.
32s 3
times
VCC or
OPEN
GND
Rapid start-up
mode
Start-up mode aimed at shortening start-up time
After +B & gt; OFFADJ is detected, resonant
controller starts up by 8ms 4 times.
32s 3
times
16s 3
times
Operation mode
Mode setup
time
Description of operation mode
GND
VCC or
OPEN
Active standby
mode
Mode aimed at developing efficiency when
applying light load
PFC performs burst operation (single operation) at
260V to 240V, resonant controller starts up by 8ms
4 times after +B & gt; 220V is detected.
VCC or
OPEN
Interme
diate
voltage
PFC overcurrent
test mode
Test mode to disable power limit
Outputs overcurrent detection signal from B_OK
pin, start-up is same as SEQ start-up mode.
1ms 3
times
Interme
diate
voltage
VCC or
OPEN
Resonant test
mode
Test mode to check resonant frequency
Same as test mode when CXA3809 MODE pin
voltage = intermediate voltage
During this mode, AC_DETOUT/B_ OK pin is Hi-Z.
1ms 3
times
In addition, intermediate voltage in the table indicates 5.6V to 7.6V.
- 32 Free Datasheet http://www.datasheet4u.com/
CXA3810M
4. State Transition between operation modes
Fig. 4 shows the state transition diagram between operation modes.Transition between active standby mode
and rapid start-up mode requires simultaneous inversion of MODE1 and MODE2 logic. Always switch logic
through MODE1 = “L”, MODE2 = “L” because the state may transition to standby mode if the state of MODE1
= “H”, MODE2 = “H” is occurred even in a socond.
Transition condition to
test mode is described
separately.
TEST
STBY
MODE1 = L
MODE2 = H
MODE1 = H
MODE2 = H
MODE1 = H
MODE2 = H
MODE1 = H
MODE2 = L
MODE1 = L
MODE2 = L
Active
STBY
MODE1 = L
MODE2 = H
MODE1 = H
MODE2 = L
Rapid
Start-up
MODE1 = H
MODE2 = H
MODE1 = L
MODE2 = L
SEQ
start-up
MODE1 = L
MODE2 = H
MODE1 = H
MODE2 = H
Latch condition
satisfied
Latch condition
satisfied
Latch condition
satisfied
NG
Fig.4 State Transition Diagram
- 33 Free Datasheet http://www.datasheet4u.com/
CXA3810M
5. B_OK Signal Output Circuit Block
When the PFC output voltage (+B) rises to 370V or more is detected, the B_OK signal goes to High output.In
addition, when the PFC output voltage falls to 354V or less is detected, the B_OK signal goes to Low
output.Detection setup time is correspondence of 128s 3 times for both rise and fall. Fig. 5 shows the B_OK
signal output timing chart. In addition, the B_OK signal is also Low during the follwing operations.
During NG latch
When transition to standby mode
When the PFC circuit is stopped (after AC_VRMS & lt; 1.65V, 66ms 8 times is set up)
H
MODE1
32µs × 3 times
H
32µs × 3 times
MODE2
IC operation mode
STBY
Sequence start-up
2.400V
(370V)
PFC_VSENSE
(+B)
B_OK
STBY
2.400V
(370V)
2.300V
(354V)
L
128µs × 3 times
128µs × 3 times
128µs × 3 times
Fig.5. B_OK Signal Output Sequence
- 34 Free Datasheet http://www.datasheet4u.com/
CXA3810M
PFC Block
6. PFC Control Circuit Block
This IC has control circuit of power-factor correction converter in critical conduction mode. Fig. 6-1 describes
an overview of operation.
IL
Vout
Q1
PFC_OUT
Edge extraction
1.3V
PFC_ZCD
ZCD_Comp
S Q
VREF
Tonmax_Comp
CT1
SW1
PFC_DRV
R Q
PFC_OUT
Voltage amplifier
2.5V
PFC_VSENSE
PFC_VAO
Fig. 6-1. PFC Circuit Block Diagram
This IC performs PFC control in critical conduction mode that applies self-oscillation. Fig. 6-2 shows the output
waveform of each block in the steady state.
t1 : When MOSFET Q1 goes ON, SW1 goes OFF, and the inductor current (IL) rises from zero at the slope
Vin/L. At the same time charging starts to the internal capacitor CT1, and continues until the CT1 voltage
reaches the PFC_VAO pin voltage.The PFC_VAO pin voltage value corresponds to the PFC output voltage
(Vout).
t2 : When the CT1 voltage reaches the PFC_VAO pin voltage, Tonmax_Comp inverts and a High signal is
output, the RESET signal is input to the RS latch circuit, and Q1 goes OFF. When Q1 goes OFF, the
inductor voltage inverts, and current is supplied to the output side via the diode.In addition, during this
period the inductor current decreases at the slope (Vout – Vin)/L, and a positive voltage is generated in the
auxiliary winding (PFC_ZCD pin voltage). The charge stored on the CT1 is discharged instantly by setting
SW1 to ON.
t3 : When the inductor current reaches 0A, the inductor voltage drops rapidly, and at the same time the
PFC_ZCD pin voltage also drops. When the IC detects that the PFC_ZCD pin voltage has fallen to 1.3V or
less, the SET signal is input to the RS latch circuit, Q1 is turned back ON, and operation shifts to the next
switching cycle.
Critical conduction mode switching is continued by repeating the above operations.Note that PFC control
circuit in critical conduction mode, the switching frequently changes constantly according to the instantaneous
value of the AC input voltage.
- 35 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Inductor current
(IL)
PFC_OUT
ZCD_Comp output
Falling edge detection
(SET signal)
PFC_VAO pin voltage
Internal timing capacitor
CT1 voltage
Tonmax_Comp output
(RESET signal)
t1
t2
t3
Fig. 6-2. Switching Operation Block Waveforms
- 36 Free Datasheet http://www.datasheet4u.com/
CXA3810M
7. PFC Operation in Active Standby Mode
PFC performs burst operation in active standby mode. Fig. 7-1 shows the outline of PFC burst operation.When
+B voltage falls to 240V or less is detected PFC operation starts, and when +B voltage rises to 260V or more
is detected PFC operation stops.
260V
240V
+B
PFC_OUT
L
PFC starts in active standby mode.
Fig. 7-1 Outline of PFC Burst Operation
Fig. 7-2 shows the outline of PFC start-up in active standby mode.IC transitions from standby mode to active
standby mode by voltage setting of MODE1 and MODE2 (t1), and PFC starts up and starts burst operation
after correspondence of 1ms 3 times when AC_VRMS pin voltage is 1.85V or more (t2). The clamp voltage
of PFC_VAO is fixed to 1.2V in active standby mode.When IC transitions from active standby mode to
sequence start-up mode (t3), PFC switches from burst operation to normal operation with continuous
oscillation.
MODE1
MODE2
32µs × 3 times
IC operation mode
STBY
32µs × 3 times
Active STBY
1.85V
AC_VRMS
Sequence start-up
1ms × 3 times
VAO clamp voltage = 1.2V
PFC_VAO
PFC operation mode
OFF
Burst
t2
t1
Continuous
t3
Fig. 7-2 Outline of PFC Start-up in Active Standby Mode
- 37 Free Datasheet http://www.datasheet4u.com/
CXA3810M
8. PFC Zero Current Detection Circuit Block
The zero current detection circuit performs critical conduction mode operation, so this circuit detects that the
inductor current has become 0A. Fig. 8 shows the equivalent circuit diagram.When the voltage of the inductor
auxiliary winding connected to the PFC-ZCD pin is set at the polarity shown in Fig. 8, a positive voltage is
generated in the auxiliary winding when MOSFET_Q1 is OFF, and a negative voltage is generated in the
auxiliary winding l when MOSFET_Q1 is ON.This auxiliary winding voltage varies greatly according to the input
voltage and the circuit configuration, so internal upper limit and lower limit clamp circuits are provided. A
resistor (Rzcd) is required to limit the outflow and inflow current to the clamp circuit to ensure normal IC
operation. Set the Rzcd value so that this clamp circuit current is 3mA or less.
Threshold mode control that uses self-oscillation requires a trigger signal to realize stable operation during
start-up or under light load conditions.This IC has a restart timer, and when the PFC_OUT output is
continuously OFF for 200s (typ.) or more, the trigger signal is automatically generated and MOSFET_Q1 is
turned ON.
In addition, an internal maximum oscillation frequency limit function (Fpfcmax) is provided to prevent the PFC
oscillation frequency from rising excessively during abnormal operation when an output diode short-circuit or
other overcurrent state is detected. After an overcurrent is detected, the PFC output is forcibly turned OFF
using pulse-by-pulse control.In this case, a counter (T_offmin: 4s (typ.)) that temporarily fixes the PFC output
Low operates by overcurrent detection signal.The signal from PFC_ZCD is masked during that period, and a
High output pulse is generated after counter operation ends.
Q1
PFC_CS
PFC_OUT
Rzcd
VCC
Lower
Clamp
0.6V
1.5V
Edge extraction
several 100ns
1.3V
S Q
PFC_ZCD
Upper
Clamp
4.4V
PFC_CS
R Q
T_offmin
Restart
timer
200µs
Inversely propotional
to VRMS
Fig. 8. ZCD Control Block Equivalent Circuit
- 38 Free Datasheet http://www.datasheet4u.com/
CXA3810M
9. PFC Maximum ON Time Control Circuit Block
The PFC_OUT ON time (Tonmax) is determined by AC_VRMS pin voltage, the capacitor (Ct) connected to the
PFC_TONMAX pin and the charging current (Ichg) from the IC.Maximum ON time is obtained by the following
equation.
0.365 Ct [pF]
Tonmax [s = --------------------------------------- + 0.227
2
AC_VRMS [V]
When Ct = 470pF, AC_VRMS = 2.5V, maximum ON time is 26.5s (typ.).In addition, the PFC_OUT pin ON
time according to the PFC_VAO pin voltage (Vvao) is obtained by the following equation. The offset voltage
(Voffset) is 0.18V (typ.).
0.1294 Ct [pF] Vvao – Voffset [V]
Ton [s = -------------------------------------------------------------------------------------------------------- + 0.227
2
AC_VRMS [V]
The maximum ON time is limited by the reference voltage of 3.0V generated in the IC though the maximum
clamp voltage of the PFC_VAO pin is 3.3V (typ.).Fig. 9 shows the equivalent circuit diagram near the
PFC_TONMAX pin.
PFC_VSENSE
Vvao
2.5V
PFC_VAO
VREF
VCC
AC_VRMS
S
Q
R
X
X2
3.0V
PFC_TONMAX
Ct
PFC_OUT
Q
Multiplier
Voffset
PFC_OUT1
MAX_ON Control
Fig. 9. Maximum ON Time Control Block Equivalent Circuit
- 39 Free Datasheet http://www.datasheet4u.com/
CXA3810M
10. PFC_VAO Clamp Voltage Control Circuit Block
This IC has a function that limits the power utilizing current detection operation by PFC_CS pin as a
countermeasure against choke winding and film capacitor squealing due to overcurrent control during startup
and AC input voltage sag recovery.
The threshold (Vthcs1, Vthcs2) of overcurrent detection level (0.4V) is set for the PFC_CS pin, and the
PFC_OUT pin voltage is forcibly decreased to Low when the PFC_CS pin voltage reaches 0.4V. In addition,
the threshold (VthDPL1, VthDPL2) which is dynamic power limit level is set for PFC_CS pin, and this value is
the sum of the composition inversely proportional to the AC_VRMS pin and the correction composition
proportional to the AC_VRMS pin. The correction composition enables acquisition of more power in the higher
AC input voltage range when the conduction angle becomes narrower as the AC input voltage is higher.
0.60
0.50
0.488
FPC OCP/DPL detection voltage [V]
Overcurrent detection level
0.4
0.40
Power limit level
0.30
0.240
0.200
0.20
0.10
0.040
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
AC_VRMS [V]
Fig. 10-1. PFC_CS Overcurrent Detection and Power Limit Level
Fig.10-1 shows overcurrent detection and power limit level of the PFC_CS pin. The threshold voltage of power
limit can be obtained by the following equation.
1.20
–3
V thDPL [V] = ------------------------------------- + 6.67 10 AC_VRMS [V]
AC_VRMS [V]
- 40 Free Datasheet http://www.datasheet4u.com/
CXA3810M
When the PFC_CS pin voltage reaches the threshold above, the PFC_VAO pin voltage changes step by step
by dynamic power limit.Details of the operation are as follows.The clamp value of the PFC_VAO pin vlotage is
set to 3.3V in normal operation, and the PFC_VAO pin vlotage is clamped at the previous PFC_VAO pin
voltage or lower when the PFC_CS pin voltage reaches dynamic power limit level.
The PFC_VAO clamp voltage is selected from the six points from 1.2V to 2.7V increment of 0.3V.When the
PFC_CS pin voltage does not reach the threshold of dynamic power limit in master side switching cycle, the
clamp value is set to the voltage by 0.3V higher at the start of the next cycle, in other words when outputting
ON pulse of the PFC_OUT pin.
The clamp voltage control operation above is performed every ON pulse output of the PFC_OUT pin.
Adjustment of the PFC_VAO pin clamp voltage prevents squealing due to overcurrent detection
operation.Fig.10-2 shows the timing chart of clamp voltage control sequence of the PFC_VAO pin.
Vthcs1
Vthdy1
PFC_CS
PFC_OUT
3.3V
PFC_VAO
Clamp voltage
2.7V
2.4V
2.4V
2.1V
2.9V
2.1V
1.8V
2.7V
2.4V
PFC_VAO
2.1V
1.8V
Fig. 10-2. PFC_VAO Clamp Voltage Cancel Sequence
- 41 Free Datasheet http://www.datasheet4u.com/
CXA3810M
11. PFC Sequence Control Circuit Block when AC Input Sag Recavery
This IC incorporates PFC recovery sequence control circuit for preventing PFC overcurrent when recovering
from AC input voltage sag.If the boost operation of PFC starts while the current is flowing from AC input side
to the direction of PFC output when AC recoveried, the MOSFET may have breakdown because the excessive
drain current flows into the MOSFET of boost converter. The recovery sequnce control circuit perfoms the
following control to avoid such phenomenon. In addition, phenomenon which current flows from AC input side
to the direction of PFC output occurs only when the AC input voltage is higher than the PFC output voltage.
When the AC input voltage is lower than the PFC output voltage, the PFC operation should be started as soon
as possible after AC recover from output voltage hold time point of view. Therefore, the operation of this
function varies according to the AC input voltage. This IC takes sampling of the AC_VRMS pin voltage at the
moment when changing the AC_DETOUT pin voltage from “H” to “L” by detection of AC OFF. When the
AC_VRMS pin voltage is higher than 5.1V (1) control below is enabled, and when the AC_VRMS pin voltage
is lower than 5.1V (2) control below is enabled.
(1) When AC input voltage is high (AC_VRMS & gt; 5.1V)
PFC restart timer control
PFC restart timer is disabled so that the MOSFET switching operation does not occur when the
AC_DETOUT pin voltage changes to “L”.When the restart timer is enabled again is the timing when the
AC_DETOUT pin voltage changes to “H” by detection of the second " C " period after AC recover.
Zero Current Detection Circuit Control by PFC_ZCD pin
The zero current detection operation by the PFC_ZCD pin is disabled 10ms after the AC_DETOUT pin
voltage is “L” and the AC_DETIN pin voltage falls to 1.95V or less so that the PFC operation does not
restart by error detection in the zero current detection circuit of choke winding by the PFC_ZCD pin
when the current flows from the AC input side to the PFC output.When the zero current detection circuit
is enabled again is the timing when the AC_DETOUT pin voltage changes to “H” by detection of the
second " C " period after AC recover.
In addition, when the AC_DETIN pin voltage rises to 1.95V or more within 10ms after the AC_DETIN
pin voltage falls to 1.95V or less, it is regarded as not instantaneous outage of AC input but rapid
change of AC input as shown in the Fig. 11-2. This control is not performed because the continued PFC
operation is required for limitting decrease of the PFC output voltage as small as possible.
PFC_VAO pin voltage control
The PFC_VAO pin voltage rises and reaches High clamp voltage soon because the PFC output voltage
falls when AC input sag occurs. The PFC overcurrent protection may function when the AC input is
recovered from this state.In order to avoid this, the PFC_VAO pin voltage is held so that it does not rise
more 20ms after the AC_DETOUT pin voltage is “L”. When the hold of the PFC_VAO pin voltage is
cancelled is the timing when the AC_DETOUT pin voltage changes to _H“ by detection of the second
" C " period after AC recovery.
- 42 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Monitors AC_DETIN for 10ms after
AC_DETIN & gt; 1.95V
AC_DETIN
65%
1.95V
AC_DETIN vs 1.95V
comparator
AC_DETOUT
20ms
10ms
Enable
PFC restart
Disable
PFC_VAO
Enable
Normal
PFC_ZCD
HOLD
Normal
Mask
Normal
Normal
Fig. 11-1. Recovery from Instanteneous Voltage Outage of AC Input 200V
AC_DETIN
1.95V
AC_DETIN vs 1.95V
comparator
AC_DETOUT
20ms
10ms
PFC restart
Enable
Disable
Enable
PFC_VAO
Normal
Normal
PFC_ZCD
Normal
Normal
When AC_DETIN & gt; 1.95V, regarded as rapid change
and over Id prevention sequence immediately cancelled
Fig. 11-2. Rapid Voltage Change of AC Input 200V
- 43 Free Datasheet http://www.datasheet4u.com/
CXA3810M
(2) When AC input voltage is low (AC_VRMS & lt; 5.1V)
PFC restart timer control
PFC restart timer is disabled so that the MOSFET switching operation does not occur when the
AC_DETOUT pin voltage changes to “L”. When the restart timer is enabled again is the timing when
the first " C " period is detected after AC recovery.
Zero Current Detection Circuit Control by PFC_ZCD pin
When the AC input voltage is low, the zero current detection operation by the PFC_ZCD pin is always
enabled because the continued PFC operation is required for limitting decrease of the PFC output
voltage as small as possible.
PFC_VAO pin voltage control
The PFC_VAO pin voltage is held in order to avoid phenomenon which the PFC overcurrent protection
functions when returning from the AC input sag 20ms after the AC_DETOUT pin voltage is “L”. When
the hold of the PFC_VAO pin voltage is cancelled is the timing when the first " C " period is detected after
AC recovery.
65%
AC_DETIN
AC_DETOUT
20ms
PFC restart
PFC_VAO
Enable
Disable
Enable
Normal
HOLD
PFC_ZCD
Normal
Normal
Fig.11-3
- 44 Free Datasheet http://www.datasheet4u.com/
CXA3810M
12. PFC Output Voltage Detection Circuit Block
Fig. 12 shows the equivalent circuit the area around the _VSENSE and PFC_OVP pins.
Vout
(+B)
R1
R2
PFC_OVP
PFC_VSENSE
VREF
0.1µA
PFC output
overvoltage latch
(OVP1)
0.1µA
2.922V
(+B = 450V)
2.700V
(+B = 416V)
2.600V
(+B = 400V)
2.500V
(+B = 385V)
2.400V
(+B = 370V)
2.300V
(+B = 354V)
2.143V
(+B = 330V)
PFC output
stop
PFC output
stop cancel
Voltage amplifier
PFC_VAO
PFC not operating
detection
B_OK
High judgment
(inverse)
B_OK
Low dudgment
Resonant controller
operation start
1.688V
(+B = 260V)
1.554V
(+B = 240V)
1.419V
(+B = 220V)
PFC stop
when Active STBY
PFC stop cancel
when Active STBY
Resonant operation
when Active STBY
PFC_VSENSE pin
short-circuit
detection
0.3V
Resonant controller
stop
RM_OFFADJ
Fig. 12. PFC Output Voltage Detection Block Equivalent Circuit
- 45 Free Datasheet http://www.datasheet4u.com/
CXA3810M
The PFC_VSENSE pin detects the PFC output voltage, and is also the circuit that performs rise sequence
control during start-up, and protects against output voltage fluctuations due to rapid load changes.
PFC overvoltage output stop
PFC_OUT output is stopped when PFC_VSENSE & gt; 2.7V (+B & gt; 416V) is detected.
PFC_OUT output is canceled when PFC_VSENSE & lt; 2.6V (+B & lt; 400V) is detected.
PFC not operating detection and B_OK pin “H” output level threshold
IC latch operation results after PFCVSENSE & lt; 2.4V (+B & lt; 370V) is detected for 10s (corresponds to 2.1s
5 times) or more.
The B_OK pin output goes to “H” when PFC_VSENSE & gt; 2.4V (+B & gt; 370V) is detected.
B_OK pin “L” output level threshold
The B_OK pin output goes to “L” when PFC_VSENSE & lt; 2.3V (+B & lt; 354V) is detected.
Resonant controller operation start
Resonant controller operation is started when PFC_VSENSE & gt; 2.143V (+B & gt; 330V) is detected.
Resonant controller stop
Resonant controller operation is stopped when PFC_VSENSE & lt; RM_OFFADJ is detected.
PFC burst control in active standby mode
PFC_OUT output is stopped when PFC_VSENSE & gt; 1.688V (+B & gt; 260V) is detected.
PFC_OUT output is canceled when PFC_VSENSE & lt; 1.554V (+B & lt; 240V) is detected.
Resonant controller operation start voltage in active standby mode
Resonant controller operation is started when PFC_VSENSE & gt; 1.419V (+B & gt; 220V) is detected.
Resonant controller operation is stopped when PFC_VSENSE & gt; 1.419V (+B & gt; 220V) is detected.
PFC_VSENSE pin open/short-circuit detection
It stops PFC_OUT output when PFC_VSENSE & lt; 0.3V is detected by open of resistor R1, short-circuit of
resistor R2, etc. In addition, when the PFC_VSENSE pin is open, the pin voltage is forcibly pulled up by
the internally supplied 0.1µA constant current, and the IC is latched when PFC_VSENSE & gt; 2.922V is
detected.
The PFC_OVP pin is a protective pin for when a PFC_VSENSE pin abnormality occurs.PFC_VSENSE pin, the
PFC_OVP pin detects the PFC output voltage, and has only an overvoltage protection function. The detection
voltage of PFC_OVP pin is the same as the detection voltage of PFC_VSENSE, and the reference voltage is
set from the same resistor ladder.
PFC overvoltage latch (PFC_OVP pin)
IC latch operation results after FC_OVP & gt; 2.922V (+B & gt; 450V) is detected.
PFC_OVP pin open detection
When the PFC_OVP pin is open same as the PFC_VSENSE, the pin voltage is forcibly pulled up by the
internally supplied 0.1µA constant current, and the IC is latched when PFC_OVP & gt; 2.922V is detected.
- 46 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Resonant Controller Block
13. Oscillator Block
13-1. Oscillator Circuit Block
SS_Current
FMIN_Current
VREF
IRT
3.6V
S Q
IN
R Q
RM_RT
N
Pulse
distribution P
DeadBand
300ns
2.4V
backflow_ng
cs1_ng
RM_OUTP
driver
RM_OUTN
driver
RM_OUTP
RM_OUTN
Fig. 13-1. Oscillator Equivalent Circuit
Fig. 13-1 shows the equivalent circuit for oscillator circuit.
Outputs of some current mirror circuits are connected to internal timing capacitor, discharge switch , and
positive input of comparator. The resonant oscillation frequency is determined by the current led from the
RM_RT pin, the current from the minimum frequency setting circuit, and the current from the soft start
circuit. The deadband width is fixed internally to 300 ns.
The Fig. 13-2 graph shows the resonant oscillation frequency response at a minimum frequency setting of
46.1 kHz, relative to the current led from the RM_RT pin.
Resonant oscillation frequency
When Rfmin = 390k connected (46.1kHz setting)
400
Frequency (RM_OUT) [kHz]
350
300
250
200
150
100
50
0
0
50
100
150
200
RM_RT current [µA]
Fig. 13-2. Resonant Oscillation Frequency
- 47 Free Datasheet http://www.datasheet4u.com/
CXA3810M
13-2. Minimum Frequency Setting Circuit Block
IFMIN × 0.05
VREF
oc[3:0]
IFMIN
1.2V
OCP/ZCS
Control logic
cs1_ng
IFMIN_LC
RM_FMIN
OSC
LC_DET
Fig. 13-3. Minimum Frequency Control Block Equivalent Circuit
Fig. 13-3 shows the minimum frequency control block equivalent circuit.
The minimum frequency can be set by externally connecting a resistor to the RM_FMIN pin.The Fig. 13-4
graph shows the minimum frequency characteristics relative to the external resistor value.
FMIN frequency characteristic
200
Freqency (RM_OUT) [kHz]
180
160
140
120
100
80
60
40
20
0
0
100
200
300
400
R (RM_FMIN) [kΩ]
Fig. 13-4. Minimum Oscillation Frequency Setting
The minimum oscillation frequency decreases when the RM_FMIN pin is left open or the current led from
the pin decreases. IC latch operation forcibly results when the current led from the pin is detected as being
continuously 1.25A or less (LC_DET) for 6s (2.1s × 3 times). This pin voltage is equivalent to 925k if it
is converted into a resisor value connected to the pin. Connect a resisitor of 700k or less to the RM_FMIN
pin making allowance for unevenness of the IC characteristics.
- 48 Free Datasheet http://www.datasheet4u.com/
CXA3810M
13-3. Soft Start Circuit Block
VREF
6.0µA
oc_ng
2.5V
Rss
RM_SS
OSC
4.0V
Timer latch
1.0µA
Fig. 13-5. Soft Start Circuit Block Equivalent Circuit
Fig. 13-5 shows the soft start block equivalent circuit.
The soft start circuit feeds back the current, determined by the internal 2.5V output, the internal resistor
(Rss), and the external capacitor, to the oscillator of the resonant controller. The resistor value of Rss is
400k in active standby mode, and 250k in sequence start-up mode and rapid start-up mode. In addition,
the maximum frequency during soft start is limited to 4 times (max.) the minimum frequency determined by
the RM_FMIN pin external resistor. Note that the frequency other than during soft start is not limited to 4
times the minimum frequency. In these cases the frequency is controlled according to the current led from
the RM_RT pin. The Fig. 13-6 graph shows the resonant oscillation frequency characteristics during soft
start.
Oscillation Frequency when Soft Start
I (RM_RT) = 0A
600
Fmin = 46.1kHz
Fmin = 96.7kHz
Frequency (RM_OUT) [kHz]
500
Fmin = 144.1kHz
400
300
200
100
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V (RM_SS) [V]
Fig. 13-6. Resonant Oscillation Frequency during Soft Start
- 49 Free Datasheet http://www.datasheet4u.com/
CXA3810M
14. Overcurrent Detection Circuit Block
VREF
0.22V
CS1_DET (+0.22V)
0.175V
CS2_DET (+0.175V)
CS1_DET
CS1_DET (–0.26V)
RM_CS1
RM_CS2
GND
Fig. 14-1. Overcurrent Detection Circuit Block
Fig. 14 shows the resonant overcurrent detection block equivalent circuit. The voltage between the RM_CS1
and RM_CS1GND pins is monitored, and overcurrents in both the positive (+0.22V) and negative (-0.25V)
directions are detected according to RM_OUTP and RM_OUTN pin operation. When the PFC output voltage
falls (PFC_VSENSE & lt; 2.143V), the overcurrent threshold voltage switch to 1.15 times normal operation both
positive and negative directions. The positive threshold results +0.253V and the negative threshold results –
0.299V. Operation in overcurrent detection mode is as shown in Fig. 14-2. When an overcurrent is detected,
regardless of positive or negative direction, the output pulse is forcibly turned off by pulse-by-pulse control. In
addition, when an overcurrent is detected, the minimum oscillation frequency is controlled to 1.2 times the
setting value. Thereafter, the minimum oscillation frequency limit changes in the order of 1.2 times 1.15
times 1.1 times 1.05 times 1.0 times the setting value with each dead band pulse, and control is
performed to return to the original setting frequency with each pulse (4 steps). The minimum oscillation
frequency is controlled to 1.2 times the setting value in this manner each time an overcurrent is detected again
during the frequency limit period. In addition, in overcurrent detection mode, the capacitor connected to the
RM_SS pin is charged by approximately 5.0A, and when the RM_SS pin voltage reaches 4.0V (128s 5
times), the IC is NG latched and the output goes off (both the RM_OUTP and RM_OUTN pins output Low).
(Timer latch operation) Approx. 1.0A is constantly discharged from the RM_SS pin to the inside of the IC, so
when the overcurrent is canceled partway, the RM_SS pin is discharged until the clamp voltage is reached.
- 50 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Positive detection
+220mV
Resonant current
Negative detection
–250mV
CS1 DET
OUTP
Pulse-by-pulse control
OUTN
DBpulse
SS charging period
Minimum resonant oscillation frequency
Fmin × 1.2
Fmin
Fig.14-2. Operating Waveform in Overcurrent Detection Mode
Fig. 14-1 also shows the continuous pulse overcurrent detection (CS2_DET: +0.175V detection) circuit by
monitoring the voltage between the RM_CS2 –and RM_CS2GND.Continuous overcurrent detection mode
operation differs from the operation shown in Fig. 14-2, and instead normal operation continues.When CS2
overcurrent detection continues for approximately 10s (set up by 2.1s 5 times), NG latch results and the IC
forcibly stopped.When CS2 overcurrent is not detected for even one cycle during the approximately 10s count,
the counter is reset. Then, when an overcurrent is detected again, the 10s counter starts from zero.
- 51 Free Datasheet http://www.datasheet4u.com/
CXA3810M
15. Resonant Circuit Stop Voltage Detection Block
External latch signal
VREF
4V
Timer Latch signal
(123µs × 5 times)
RM_OFFADJ
Resonant circuit stop
(1ms × 3 times)
PFC_VSENSE
Fig. 15. RM_OFFADJ Pin Internal Equivalent Circuit
Fig. 15. shows the RM_OFFADJ pin internal equivalent circuitThe RM_OFFADJ pin is the threshold voltage
setting pin to stop the resonance circuit when the PFC output voltage falls. The resonance circuit stops when
the PFC_VSENSE pin voltage falls to the RM_OFFADJ pin voltage or less. The stop voltage can be set by the
VREF devided voltage circuit by an external resistor enclosed by the red dotted line in Fig. 15.
Note) When the PFC output voltage is set to 385V (PFC_VSENSE = 2.5V) and the RM_OFFADJ pin is input
1.883V, the resonant circuit is stopped when the PFC output voltage falls to 290V or less (1ms × 5
times).
The RM_OFFADJ pin has an error latch detection function that activates at 4.0V or more, so the IC can be
forcibly set to latch operation using the secondary side overvoltage detection or other signal by externally
adding the circuit enclosed by the blue dotted line in Fig. 15.
- 52 Free Datasheet http://www.datasheet4u.com/
CXA3810M
16. NG Latch Operation
PFC overvoltage latch
Latch operation results after PFC_OVP & gt; 2.922V (+B & gt; 450V) is detected and set up by 1ms 3 times.
Note) The overvoltage detection does not function when PFC_VSENSE & gt; 2.922V.
In addition, PFC_VSENSE & gt; 2.700V (+B & gt; 416V) overvoltage detection does not result in latch
operation, and PFC output stops.
PFC continuous overcurrent detection latch
IC latch operation results when a pin abnormality such as PFC_VAO pin open or PFC_TONMAX pin
shortcircuited to GND occurs, and the overcurrent detection state is continuously detected due to abnormal
PFC oscillation.When a PFC overvoltage is detected 4 times or more per commercial half cycle during AC
detection operation excepting " C " period, this is counted as one NG time. Latch operation results when the
2.1s counter detects this NG state 5 consecutive times.
PFC continuous dynamic power limit latch
Latch operation results when detecting consecutively the state of dynamic power limit enabled by the
detection method same as the PFC continuous overcurrent detection latch.
PFC not operating detection latch
When a pin abnormality such as PFC_OUT pin open occurs, the AC input voltage is high, and the load is
light, the PFC output voltage (+B voltage) maintains the high state, and the resonant circuit continues to
operate. To avoid this phenomenon, latch operation results when PFC_VSENSE & lt; 2.4V (+B & lt; 370V) is
continuously detected for 2.1s 5 times.
Resonant overcurrent timer latch
When RM_CS & gt; 0.22V or RM_CS & lt; -0.25V is detected, the RM_SS pin is charged by a charging current
of 5.0A. Latch operation results after RM_SS & gt; 4.0V is detected and set up by 128s 5 times.
Resonant continuous overcurrent latch
Latch operation results after RM_CS & gt; 0.175V is detected continuously and set up by 2.1s 5 times.
TSD (IC overheat) latch
Latch operation results after a chip temperature of approximately 140°C is detected and delay time of
approximately 30s due to analog circuit.
RM_OFFADJ latch
Latch operation results after RM_OFFADJ & gt; 4.0V is detected and set up by 128s 5 times.
Other latch
Latch operation results after any of the following operations are detected and set up by 2.1s 3 times.
VREF_OVLO detection 5.5V or more
PFC_VAO pin overcurrent detection 80A or more
PFC_ZCD clamp circuit overcurrent detection +6.0mA or more, –6.0mA or less
PFC_VSENSE short-circuit detection 0.3V or less
RM_FMIN pin low current 10A or less
Circuit operation stops after NG latch other than latch due to TSD, but the VREF pin continues to output High,
and the AC detection function remains enabled.In addition, the B_OK outputs Low.NG latch is canceled by
transitioning to standby mode.During TSD latch the VREF pin outputs Low, and the TSD latch state is canceled
only by turning the IC power off and on again, or by detecting VCC UVLO (VCC & lt; 9.6V).
- 53 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Timing Chart
1. PFC Resonant controller startup sequence
Sequence start-up mode
H
MODE1
32µs × 3 times
32µs × 3 times
H
MODE2
IC operation mode
Sequence start-up
STBY
STBY
PFC_VSENSE (+B)
2.5V (385V)
2.143V (330V)
OFFADJ
8ms × 6 times
8ms × 6 times
RM_SS
1ms × 5 times
Fig. 16. Start-up Waveform in Sequence start-up mode
(* The +B voltage shows an example of setting that PFC_VSENSE = 2.5V when +B = 385V.)
Rapid start-up mode
H
MODE1
32µs × 3 times
32µs × 3 times
H
MODE2
IC operation mode
STBY
Rapid start-up
STBY
PFC_VSENSE (+B)
2.5V (385V)
2.143V (330V)
OFFADJ
8ms × 4 times
8ms × 4 times
RM_SS
1ms × 5 times
Fig. 17. Start-up Waveform in Rapid Start-up Mode
(* The +B voltage shows an example of setting that PFC_VSENSE = 2.5V when +B = 385V.)
- 54 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Active standby mode
H
32µs × 3 times
32µs × 3times
MODE1
H
MODE2
IC operation mode
STBY
SEQ start-up
Active STBY
VSENSE (+B)
2.5V (385V)
2.143V (330V)
OFF_ADJ →
← PFC burst range
1.419V (220V)
8ms × 4 times
1ms × 5 times
REG12
OFFADJ disable
OFFADJ enable
Fig. 18. Start-up Waveform in Active Standby Mode
(* The +B voltage shows an example of setting that PFC_VSENSE = 2.5V when +B = 385V.)
- 55 Free Datasheet http://www.datasheet4u.com/
CXA3810M
11 RM_OFFADJ
RM_SS 13
RM_CS2 14
10 PFC_TONMAX
12 RM_FMIN
RM_CS1 15
PFC_OVP
9
VREF 17
RM_RT 16
PFC_VSENSE
8
VCC 19
PFC_VAO
7
GND 18
PFC_CS
6
B_OK 20
PFC_ZCD
5
RM_OUTN 21
AC_VRMS
4
AC_DETOUT 22
AC_DETIN
3
27kΩ
330kΩ
330kΩ
330kΩ
AC IN
85 - 264V
330kΩ
0.47µF
MODE2 24
MODE1
2
RM_OUTP 23
PFC_OUT
1
12V
Photo
coupler
Regulator
Application Circuit
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems
arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
- 56 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Example of Representative Characteristics
VCC_UVLO opetation start voltage
VREF output voltage VCC = 12V
Opetation start voltage [V]
5.20
5.15
VREF [V]
5.10
5.05
5.00
4.95
4.90
4.85
4.80
–30
–5
20
45
70
95
12.0
11.6
11.2
10.8
10.4
10.0
–30
120
–5
20
95
120
10.4
Opetation stop voltage [V]
1100
1000
900
800
700
600
500
–5
20
45
70
95
10.2
10.0
9.8
9.6
9.4
9.2
9.0
8.8
–30
120
–5
20
45
70
95
120
Temp [˚C]
Temp [˚C]
Current comsumption in operation mode
VCC = 12V No Switching
VCC_UVLO hysteresis voltage
1.8
4.0
3.5
3.0
2.5
2.0
1.5
–30
70
VCC_UVLO opetation stop voltage
Current comsumption in standby mode VCC = 12V
400
–30
45
Temp [˚C]
Hysteresis voltage [V]
Current comsumption in operation mode [mA]
Current comsumption in standby mode [µA]
Temp [˚C]
–5
20
45
70
95
120
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
–30
–5
20
45
70
95
120
Temp [˚C]
Temp [˚C]
- 57 Free Datasheet http://www.datasheet4u.com/
PFC operation start voltage [V]
PFC operation start voltage
1.92
1.90
1.88
1.86
1.84
1.82
1.80
1.78
–30
–5
20
45
70
95
120
AC_DETOUT output High voltage [V]
CXA3810M
AC_DETOUT output High voltage VCC = 18V
18.0
17.8
17.6
17.4
17.2
17.0
16.8
–30
–5
20
45
70
95
120
AC_DETOUT output Low voltage VCC = 18V
1.72
1.70
1.68
1.66
1.64
1.62
1.60
1.58
–30
–5
20
45
70
95
120
AC_DETOUT output Low voltage [V]
Temp [˚C]
PFC operation stop voltage
PFC operation stop voltage [V]
Temp [˚C]
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–30
–5
20
45
70
95
120
Temp [˚C]
PFC operation hysteresis voltage
B_OK output High voltage VCC = 18V
0.24
B_OK output High voltage [V]
PFC operation hysteresis voltage [V]
Temp [˚C]
0.23
0.22
0.21
0.20
0.19
0.18
0.17
0.16
–30
–5
20
45
70
95
120
Temp [˚C]
18.0
17.8
17.6
17.4
17.2
17.0
16.8
–30
–5
20
45
70
95
120
Temp [˚C]
- 58 Free Datasheet http://www.datasheet4u.com/
1.0
0.8
0.6
0.4
0.2
0.0
–30
–5
20
45
70
95
120
MODE1 detection High voltage [V]
Temp [˚C]
MODE1 detection High voltage
8.6
8.4
8.2
8.0
7.8
7.6
7.4
–30
–5
20
45
70
95
120
PFC_OUT output High voltage [V]
B_OK output Low voltage [V]
B_OK output Low voltage VCC = 18V
1.2
Discharge resistance when AC OFF [Ω]
CXA3810M
Discharge resistance when AC OFF
170
160
150
140
130
120
110
100
90
–30
–5
20
5.6
5.5
5.4
5.3
5.2
5.1
45
70
95
120
PFC_OUT output Low voltage [V]
MODE1 detection Low voltage [V]
5.7
20
95
120
18.00
17.96
17.92
17.88
17.84
17.80
–30
–5
20
45
70
95
120
Temp [˚C]
MODE1 detection Low voltage
–5
70
PFC_OUT output High voltage VCC = 18V
Temp [˚C]
5.0
–30
45
Temp [˚C]
PFC_OUT output Low voltage VCC = 18V
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–30
–5
20
45
70
95
120
Temp [˚C]
Temp [˚C]
- 59 Free Datasheet http://www.datasheet4u.com/
PFC_OUT rise time [ns]
120
100
80
60
40
20
0
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_OUT fall time VCC = 18V
PFC_OUT fall time [ns]
120
100
80
60
40
20
0
–30
–5
20
45
70
95
120
PFC_CS1 power limit detection voltage1
0.60
0.55
0.50
0.45
0.40
–30
–5
0.45
0.40
0.35
–5
20
45
70
95
45
70
95
120
PFC_CS1 power limit detection voltage2
0.30
0.25
0.20
–30
–5
20
45
70
95
120
95
120
Temp [˚C]
PFC_CS blanking time
0.50
0.30
–30
20
Temp [˚C]
PFC_CS1 overcurrent detection voltage
PFC_CS blanking time [ns]
PFC_CS1 overcurrent detection voltage [V]
Temp [˚C]
PFC_CS1 power limit detection voltage2 [V]
PFC_OUT rise time VCC = 18V
PFC_CS1 power limit detection voltage1 [V]
CXA3810M
120
320
300
280
260
240
220
200
180
–30
–5
20
45
70
Temp [˚C]
Temp [˚C]
- 60 Free Datasheet http://www.datasheet4u.com/
PFC_CS1 detection delay time
220
200
180
160
140
120
100
80
–30
–5
20
45
70
95
120
PFC_ZCD hysteresis voltage [mV]
PFC_CS1 detection delay time [ns]
CXA3810M
PFC_ZCD hysteresis voltage
230
220
210
200
190
180
170
–30
–5
20
1.45
1.40
1.35
1.30
1.25
1.20
1.15
20
45
70
95
120
PFC_ZCD clamp High voltage [V]
PFC_ZCD threshold voltage [V]
PFC_ZCD threshold voltage 1.3V
–5
1.60
1.55
1.50
1.45
1.40
20
45
70
95
120
PFC_ZCD clamp Low voltage [V]
PFC_ZCD threshold voltage [V]
1.65
–5
120
5.2
5.0
4.8
4.6
4.4
4.2
4.0
3.8
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_ZCD threshold voltage 1.5V
–30
95
PFC_ZCD clamp High voltage
Temp [˚C]
1.35
70
Temp [˚C]
Temp [˚C]
–30
45
PFC_ZCD clamp Low voltage
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–30
–5
20
45
70
95
120
Temp [˚C]
Temp [˚C]
- 61 Free Datasheet http://www.datasheet4u.com/
PFC restart timer [µs]
220
210
200
190
180
170
–30
–5
20
45
70
95
120
PFC resonant maximum oscillation frequency
310
290
270
250
230
210
190
170
–30
–5
20
45
70
95
120
PFC_VAO output source current
45
40
35
30
25
20
15
10
5
–30
–5
20
3.40
3.30
3.20
3.10
45
70
120
PFC_VAO output sink current
25
20
15
10
5
0
–30
–5
20
45
70
95
120
95
120
PFC_TONMAX on time
3.50
20
95
Temp [˚C]
3.60
–5
70
30
PFC_VAO output High clamp voltage
3.00
–30
45
Temp [˚C]
Temp [˚C]
PFC_TONMAX on time [µs]
PFC_VAO output High clamp voltage [V]
PFC resonant maximum oscillation frequency [kHz]
Temp [˚C]
PFC_VAO output sink current [µA]
PFC restart timer
230
PFC_VAO output source current [µA]
CXA3810M
95
120
30
29
28
27
26
25
24
–30
–5
20
45
70
Temp [˚C]
Temp [˚C]
- 62 Free Datasheet http://www.datasheet4u.com/
7.5
7.0
6.5
6.0
5.5
5.0
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_TONMAX on time [µs]
PFC_TONMAX on time
50
45
40
35
30
25
20
15
10
5
0
2
3
4
5
6
VRMS [V]
PFC control voltage
PFC control voltage [V]
2.53
2.52
2.51
2.50
2.49
2.48
2.47
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_VSENSE output stop voltage [V]
8.0
PFC_VSENSE stop cancel voltage [V]
PFC_TONMAX on time2 [µs]
PFC_TONMAX on time2
PFC_VSENSE overcurrent detection voltage [V]
CXA3810M
PFC_VSENSE overcurrent detection voltage
3.02
2.98
2.94
2.90
2.86
2.82
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_VSENSE output stop voltage
2.76
2.74
2.72
2.70
2.68
2.66
2.64
–30
–5
20
45
70
95
120
Temp [˚C]
PFC_VSENSE stop cancel voltage
2.66
2.64
2.62
2.60
2.58
2.56
2.54
–30
–5
20
45
70
95
120
Temp [˚C]
- 63 Free Datasheet http://www.datasheet4u.com/
2.30
2.25
2.20
2.15
2.10
2.05
2.00
–30
–5
20
45
70
95
120
RM_OUT output High voltage [V]
PFC_VSENSE resonant start voltage
RM_OUT output High voltage VCC = 18V
18.00
17.95
17.90
17.85
–30
–5
20
Temp [˚C]
3.02
2.98
2.94
2.90
2.86
–5
20
45
70
95
120
RM_OUT output Low voltage [V]
PFC_OVP overvoltage detection voltage
2.82
–30
70
95
120
RM_OUT output Low voltage VCC = 18V
0.15
0.10
0.05
0.00
–30
–5
20
Temp [˚C]
45
70
95
120
Temp [˚C]
RM_OFFADJ external error detection voltage
RM_OUT rise time VCC = 18V
120
4.3
4.2
4.1
4.0
3.9
3.8
3.7
–30
45
Temp [˚C]
RM_OUT rise time [ns]
RM_OFFADJ external error detection voltage [V]
PFC_OVP overvoltage detection voltage [V]
PFC_VSENSE resonant start voltage [V]
CXA3810M
–5
20
45
70
95
120
Temp [˚C]
100
80
60
40
20
0
–30
–5
20
45
70
95
120
Temp [˚C]
- 64 Free Datasheet http://www.datasheet4u.com/
RM_OUT fall time VCC = 18V
RM_OUT fall time [ns]
120
100
80
60
40
20
0
–30
–5
20
45
70
95
120
RM_SS soft start end voltage [V]
CXA3810M
RM_SS soft start end voltage
2.7
2.6
2.5
2.4
2.3
2.2
2.1
–30
–5
20
Temp [˚C]
10
5
20
45
70
95
120
Temp [˚C]
RM_SS clamp voltage [V]
RM_SS clamp voltage
2.8
2.7
2.6
2.5
2.4
2.3
2.2
–30
–5
20
45
70
95
120
Temp [˚C]
RM_SS overcurrent timer latch voltage [V]
15
RM_SS charge current when overcurrent [µA]
RM_SS charge current [µA]
20
–5
70
95
120
Temp [˚C]
RM_SS charge current
0
–30
45
RM_SS overcurrent timer latch voltage
4.3
4.2
4.1
4.0
3.9
3.8
3.7
–30
–5
20
45
70
95
120
Temp [˚C]
RM_SS charge current when overcurrent
8
7
6
5
4
3
2
–30
–5
20
45
70
95
120
Temp [˚C]
- 65 Free Datasheet http://www.datasheet4u.com/
RM_RT resonant maximum
oscillation frequency [kHz]
RM_RT resonant maximum oscillation frequency
1100
1000
900
800
700
–30
–5
20
45
70
95
120
RM_FMIN minimum oscillation frequency
setting 1 [kHz]
CXA3810M
RM_FMIN minimum oscillation frequency setting 1
50
48
46
44
42
40
–30
–5
20
Temp [˚C]
320
310
300
290
280
270
20
45
70
95
120
RM_RT clamp frequency magnification
during soft start
Temp [˚C]
RM_RT clamp frequency magnification
during soft start
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
–30
–5
20
45
70
95
120
Temp [˚C]
RM_FMIN minimum oscillation frequency
setting 2 [kHz]
330
RM_FMIN minimum oscillation frequency
setting 3 [kHz]
RM_RT deadband width [µs]
340
–5
70
95
120
Temp [˚C]
RM_RT deadband width
260
–30
45
RM_FMIN RM_FMIN minimum
oscillation frequency setting 2
104
102
100
98
96
94
92
90
–30
–5
20
45
70
95
120
Temp [˚C]
RM_FMIN minimum oscillation frequency setting 3
160
155
150
145
140
135
130
–30
–5
20
45
70
95
120
Temp [˚C]
- 66 Free Datasheet http://www.datasheet4u.com/
0.23
0.22
0.21
0.20
–30
–5
20
45
70
95
120
RM_CS1 RM_CS1 negative side overcurrent
detection voltage [V]
Temp [˚C]
RM_CS1 RM_CS1 negative side
overcurrent detection voltage
–0.22
–0.23
–0.24
–0.25
–0.26
–0.27
–0.28
–0.29
–0.30
–30
–5
20
45
70
95
120
RM_CS1 overcurrent detection delay time
(sine wave input: 90kHz)
Reference data (Design assurance)
400
350
300
250
200
150
100
–30
–5
20
200
180
160
140
120
100
–5
20
45
70
95
120
RM_CS1 overcurrent mask time
600
550
500
450
400
350
–30
–5
20
45
70
95
120
Temp [˚C]
220
80
–30
45
Temp [˚C]
Temp [˚C]
RM_CS1 overcurrent detection delay time
(square wave input)
RM_CS1 overcurrent detection
delay time [ns]
RM_CS1 overcurrent detection delay time [ns]
0.24
RM_CS1 overcurrent mask time [ns]
RM_CS1 positive side
overcurrent detection voltage
70
95
120
Temp [˚C]
RM_CS2 continuous overcurrent
detection voltage [V]
RM_CS1 positive side overcurrent
detection voltage [V]
CXA3810M
RM_CS2 continuous overcurrent detection voltage
0.20
0.19
0.18
0.17
0.16
0.15
–30
–5
20
45
70
95
120
Temp [˚C]
- 67 Free Datasheet http://www.datasheet4u.com/
CXA3810M
[µA]
RM_CS
13
12
11
10
RM_CS
9
8
7
6
–30
–5
20
45
70
95
120
70
95
120
Temp [˚C]
1100
1ms clock [µs]
1080
1060
1040
1020
1000
980
960
–30
–5
20
45
Temp [˚C]
- 68 Free Datasheet http://www.datasheet4u.com/
CXA3810M
Package Outline
(Unit : mm)
SDT: 875336310
24PIN SOP (PLASTIC)
+ 0.4
1.85 – 0.15
+ 0.4
15.0 – 0.1
24
13
+ 0.2
0.1 – 0.05
6.9
7.9 ± 0.4
+ 0.3
5.3 – 0.1
0.15
+ 0.1
0.2 – 0.05
1.27
0.45 ± 0.1
0.24
0.5 ± 0.2
12
1
M
PACKAGE STRUCTURE
MOLDING COMPOUND
EPOXY RESIN
SONY CODE
SOP-24P-L01
LEAD TREATMENT
SOLDER PLATING
EIAJ CODE
SOP024-P-0300
LEAD MATERIAL
42/COPPER ALLOY
PACKAGE MASS
0.3g
JEDEC CODE
- 69 Free Datasheet http://www.datasheet4u.com/
CXA3810M
AOI: 875337210
- 70 -
Sony Corporation
Free Datasheet http://www.datasheet4u.com/