Posiadam driver led DRIVER LED 36W 300mA 51 - 130V - 36W(opis z aukcji), na układzie BP2833D. Czy mogę podnieść zasilanie na wyjściu by osiągnąć większą moc. Przesyłam notę katalogową oraz zdjęcia tego układu, wygląda że to typowa aplikacja z noty. Dodatkowo czy da się tym driverem sterować przez PWM. Chciałbym wykorzystać ten układ do Arduino ?
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Description
Features
The BP2833D is a high precision buck constant
current LED driver. The device operates in critical
conduction mode and is suitable for 85Vac~265Vac
universal input offline LED lighting.
The BP2833D integrates a 500V power MOSFET.
With patent pending MOSFET driving technique, the
operating current of the IC is very low. So it doesn’t
need the auxiliary winding for supplying the chip. It
can achieve excellent constant current performance
with very few external components, so the system
cost and size are minimized.
The BP2833D utilizes patent pending current control
method. It can achieve precise output current and
excellent line regulation. The driver operates in
critical conduction mode, the output current does not
change with the inductance and LED output voltage.
Critical Conduction Mode Operation
Internal 500V Power MOSFET
No Auxiliary Winding
Ultra Low Operating Current
± LED Output Current Accuracy
5%
LED Open Protection
LED Short Protection
Current Sensing Resistor Short Protection
VCC Under Voltage Protection
Thermal Regulation Function
Available in DIP-8 Package
Applications
LED Tube
LED Ceiling Light
LED Bulb
Other LED Lighting
The BP2833D offers rich protection functions to
improve the system reliability, including LED open
circuit protection, LED short circuit protection, VCC
under voltage protection, CS resistor short circuit
protection and thermal regulation function.
Typical Application
AC
BP2833D
4 VCC
DRAIN 5
2 ROVP
DRAIN 6
3 NC
CS 7
1 GND
CS 8
Figure 1. Typical application circuit for BP2833D
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential – Customer Use Only
1
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Ordering Information
Part Number
Package
Operating
Temperature
BP2833D
DIP8
-40 ℃ to 105 ℃
Package Method
Tube
50 Piece/Tube
Marking
BP2833D
XXXXXY
WWXYY
Pin Configuration and Marking Information
CS
GND
NC
VCC
BP2833D
XXXXXY
WWXYY
ROVP
CS
DRAIN
XXXXXY: Lot Code
WW: Sign
X: Year
YY: Week
DRAIN
Figure 2. Pin configuration
Pin Definition
Pin No.
Name
1
GND
Ground
2
ROVP
Over Voltage Protection Setting Pin. Connect a resistor to GND
3
NC
4
VCC
5,6
DRAIN
7,8
CS
BP2833D_EN _DS_Rev.1.0
Description
No connection. Should be connected to IC GND(Pin1)
Power Supply Pin
Internal HV Power MOSFET Drain
Current Sense Pin. Connect a sense resistor between this pin and GND
pin.
www.bpsemi.com
BPS Confidential – Customer Use Only
2
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Absolute Maximum Ratings (note1)
Symbol
Parameters
ICC_MAX
mA
-0.3~500
Internal HV MOSFET drain voltage
Units
5
VCC pin maximum sink current
DRAIN
Range
V
CS
Current sense pin input voltage
-0.3~6
V
ROVP
Over-voltage setting pin voltage
-0.3~6
V
PDMAX
Power dissipation (note 2)
0.9
W
θJA
Thermal resistance (Junction to Ambient)
80
℃/W
TJ
Operating junction temperature
-40 to 150
℃
Storage temperature range
-55 to 150
℃
2
KV
TSTG
ESD (note 3)
Note 1: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. Under “recommended operating
conditions” the device operation is assured, but some particular parameter may not be achieved. The electrical characteristics table defines the operation
range of the device, the electrical characteristics is assured on DC and AC voltage by test program. For the parameters without minimum and maximum
value in the EC table, the typical value defines the operation range, the accuracy is not guaranteed by spec.
Note 2: The maximum power dissipation decrease if temperature rise, it is decided by TJMAX, θJA, and environment temperature (TA). The maximum power
dissipation is the lower one between PDMAX = (TJMAX - TA)/ θJA and the number listed in the maximum table.
Note 3: Human Body mode, 100pF capacitor discharge on 1.5KΩ resistor
Recommended Operation Conditions
Symbol
Parameter
Range
Unit
ILED1
Output LED current @ Vout=72V
(Input voltage 176V～265V)
320
mA
ILED2
Output LED current @ Vout=36V
(Input voltage 176V～265V)
360
mA
VLED min
Minimum LED Loading Voltage
& gt; 15
V
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential – Customer Use Only
3
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Electrical Characteristics (Notes 4, 5) (Unless otherwise specified, VCC=15V and TA =25 ℃)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VCC_CLAMP
VCC Clamp Voltage
1mA
16.8
V
VCC_ON
VCC Turn On Threshold
VCC Rising
13.8
V
VCC_UVLO
VCC Turn off Threshold
VCC Falling
9
V
IST
VCC Startup Current
VCC= VCC-ON - 1V
120
180
uA
IOP
VCC Operating Current
FOP=70KHz
100
150
uA
400
412
mV
Supply Voltage Section
Current Sense Section
VCS_TH
Threshold Voltage for
Peak Current Limit
VCS_SHORT
Threshold Voltage for
Peak Current Limit When
Output Short
TLEB
TDELAY
388
Output Short
200
mV
Leading Edge Blanking
Time for Current Sense
350
ns
Switch Off Delay Time
200
ns
Internal Time Control Section
TOFF_MIN
Minimum OFF Time
3
us
TOFF_MAX
Maximum OFF Time
240
us
TON_MAX
Maximum On Time
40
us
VROVP
ROVP Pin Voltage
0.5
V
5
Ω
MOSFET Section
RDS_ON
Static Drain-source
On-resistance
VGS=15V/IDS=0.4A
BVDSS
Drain-Source Breakdown
Voltage
VGS=0V/IDS=250uA
IDSS
Power MOSFET Drain
Leakage Current
VGS=0V/VDS=500V
500
V
1
uA
Thermal Regulation Section
TREG
Thermal Regulation
Temperature
150
℃
Note 4: production testing of the chip is performed at 25°
C.
Note 5: the maximum and minimum parameters specified are guaranteed by test, the typical value are guaranteed by design, characterization and statistical
analysis
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential – Customer Use Only
4
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Internal Block Diagram
DRAIN
VCC
VCC
17V
HV
MOSFET
9.0V 14V
OTP
+
-
-
OCP
CC &
Logic Control
OVP
UVLO
RESET
LED
CS
+
Current
Sense
-
400mV
GND
ROVP
Figure 3. BP2833D Internal Block Diagram
Application Information
The BP2833D is a high performance non-isolated
Buck converter specially designed for LED lighting.
The device integrates a 500V power MOSFET. With
very few external components, the converter
achieves excellent constant current control. And it
does not need auxiliary winding for powering the IC
or voltage sensing, hence the system size and cost is
greatly reduced.
Start Up
After system powered up, the VCC pin capacitor is
charged up by the start up resistor. When the VCC
pin voltage reaches the turn on threshold, the internal
circuits start operating. The BP2833D integrates a
17V zener diode to clamp the VCC voltage. Due to
the ultra-low operating current, the auxiliary winding
is not needed to supply the IC.
BP2833D_EN _DS_Rev.1.0
Constant Current Control
Cycle by Cycle current sense is adopted in BP2833D,
the CS pin is connected to the current sense
comparator, and the voltage on CS pin is compared
with the internal 400mV reference voltage. The
MOSFET will be switched off when the voltage on
CS pin reaches the threshold. The CS comparator
includes a 350ns leading edge blanking time.
The peak inductor current is given by:
I PK
400
(mA)
R CS
Where, RCS is the current sense resistor value.
The current in LED can be calculated by the
equation:
www.bpsemi.com
BPS Confidential – Customer Use Only
5
BP2833D
晶丰明源半导体
I LED
Non-isolated Buck Offline LED Driver
I PK
2
Where, IPK is the peak current of the inductor.
Inductor Selection
The BP2833D works under inductor current critical
conduction mode. When the power MOFET is
switched on, the current in the inductor rises up from
zero, the on time of the MOSFET can be calculated
by the equation:
t on
L IPK
VIN VLED
Over Voltage Protection
The over voltage protection can be programmed by
the ROVP pin resistor. The ROVP pin voltage is
0.5V.
When the LED is open circuit, the output voltage
increases gradually, and the demagnetization time
gets shorter. The demagnetization time at OVP---Tovp can be calculated by the open circuit protection
voltage:
Where,
L is the inductance value
VIN is the DC bus voltage after the rectifier bridge
VLED is the voltage on the LED
After the power MOSFET is switched off, the
current in the inductor decreases. When the inductor
current reaches zero, the power MOSFET is turned
on again by IC internal logic. The off time of the
MOSFET is given by:
t off
small, the tOFF may be smaller than the minimum off
time, system will operate in discontinuous
conduction mode and the output current will be
smaller than the designed value. If the inductance is
too large, the tOFF may be larger than the maximum
off time, the system will operate in continuous
conduction mode and the output current will be
higher than the designed value. So it is important to
choose a proper inductance.
L IPK
VLED
Tovp
L Vcs
Rcs Vovp
Where，
Vcs is the CS pin turn off threshold (400mV)
Vovp is the open circuit protection voltage
And then the Rovp resistor value can be calculated
by the equation:
The inductance can be calculated by the equation:
Rovp 15 * Tovp*106
V (VIN VLED )
L LED
f IPK VIN
Protection Function
The f is the system switching frequency, which is
proportional to the input voltage. So the minimum
switching frequency is set at lowest input voltage,
and the maximum switching frequency is set at
highest input voltage.
The minimum and maximum off time of BP2833D is
set at 3us and 240us, respectively. Referring to the
equation of tOFF calculation, if the inductance is too
BP2833D_EN _DS_Rev.1.0
（kohm）
The BP2833D offers rich protection functions to
improve the system reliability, including LED
open/short protection, CS resistor short protection,
VCC under voltage protection, thermal regulation.
When the LED is open circuit, the system will
trigger the over voltage protection and stop
switching.
When the LED short circuit is detected, the system
works at low frequency (5kHz), and the CS pin turn
www.bpsemi.com
BPS Confidential – Customer Use Only
6
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
off threshold is reduced to 200mV. So the system
power consumption is very low. At some
catastrophic fault condition, such as CS resistor
shorted or inductor saturated, the internal fast fault
detection circuit will be triggered, the system stops
switching immediately.
After the system enters into fault condition, the VCC
voltage will decrease until it reaches the UVLO
threshold, then the system will re-start again. If the
fault condition is removed, the system will recover to
normal operation.
the bus capacitor loop.
NC pin
The NC pin should be connected to GND (pin1).
Drain Pin
To increase the copper area of DRAIN pin for better
thermal dissipation. However too large copper area
may compromise EMI performance.
Thermal Regulation
The BP2833D integrates thermal regulation function.
When the system is over temperature, the output
current is gradually reduced; the output power and
thermal dissipation are also reduced. The system
temperature is regulated and the system reliability is
improved. The thermal regulation temperature is set
to 150℃ internally.
PCB Layout
The following rules should be followed in BP2833D
PCB layout:
Bypass Capacitor
The bypass capacitor on VCC pin should be as close
as possible to the VCC Pin and GND pin.
ROVP Pin
The ROVP resistor should be as close as possible to
the ROVP Pin.
Ground Path
The power ground path for current sense should be
short, and the power ground path should be separated
from small signal ground path before connecting to
the negative node of the bulk capacitor.
The Area of Power Loop
The area of main current loop should be as small as
possible to reduce EMI radiation, such as the
inductor, the power MOSFET, the output diode and
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential – Customer Use Only
7
BP2833D
晶丰明源半导体
Non-isolated Buck Offline LED Driver
Physical Dimensions
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential – Customer Use Only
8