Masz inverter TBD489NR na IC: MSC 1697=LX1697 Link_tutaj znajdziesz datasheet Dodałem w zał.(bo czasem strona nie działą) Obsługuje dwie lampy + matryca LTN184HT01-A02. Na pierwszym i drugim pin_ie POwinny być jakieś napięcia (DIM/BLIM i Enable chyba, piszę z pamięci) czyli w granicach pin.1 ok. 2,5V (1,5-3,5V regulacja) pin.2 +5V Reszta jest oK. Te modele (chyba były z 3-y, bowiem po 8920G-powinny być kolejne cyferki /literki ) z Aspire 8920 były na platformie : Inventec 6050A2184601-MB-A02 - EC IT8512E -Intel® PM965 + ICH-8M -video albo GF9500 / lub G84-725-A2 (GS 8600M GTS ) Czyli reasumująć: 1.szukaj gdzie zginęły Twoje nap. z pin.1-2 -o scalaku opcja Szukaj Opcja z kondkami 27-47pF/3kV jest dobra.. tylko w laptopach zależy od sposoby włączenai lamp CCFL (szeregowo czy równolegle) Czasem można lepiej właczyć je z R=10-30 ohm lub zamiast nich opornik 5W 100k (':!:') (':!:') Tylko na czas POMIARU Ja w monitorach stawiałem zawsze 750pF-1nF/1,6kV i się sprawdzało w 8/na 10 testów. http://obrazki.elektroda.pl/5971121600_1386273497_thumb.jpg
LX1697
®
TM
High Performance CCFL Controller
P RODUCTION D ATA S HEET
KEY FEATURES
DESCRIPTION
7 to 25 Volts Wide Input Voltage
Range
Resistor Programmable Lamp
Operating Frequency within ±3%
Tolerance
Resistor Programmable Burst
Operating Frequency
Support IntelTM DPST for System
PWM input
Compatible with Microsemi’s new
SMBus CCFL controllers
Fully Programmable Open Lamp
and Load Fault Time Outs
On Chip Full Wave Rectifiers for
Lamp Voltage and Current
Cost Effective and Low Parts Count
Inverter Modules
Uses Industry Standard High
Voltage Transformers
stage consists of direct coupled full
bridge high voltage drivers for the
external N-channel high side and Nchannel low side power FETs.
The LX1697 includes lamp current
and open lamp voltage regulation,
fully programmable lamp frequency and
burst dimming frequency oscillators,
and our patented fool-proof lamp strike
circuitry.
Additional features comprise an enable
input, under-voltage lockout, analog
programmable open lamp strike timeout, over voltage, and short circuit fault
detection.
The LX1697 can also be used with
Microsemi’s LX1801 SMBus controller
to provide a completely digital
interfaced backlight control system.
The LX1697 is available in the 24
pin 4x4 mm MLPQ surface mount
package and is specified from -20°C to
70°C.
WWW . Microsemi .C OM
The LX1697 is a high performance
CCFL controller optimized for wide
input voltage range notebook display
back lighting applications.
Its brightness control architecture
supports Intel’s DPST (Display Power
Saving Technology) that adjusts the
brightness as a function of video
content.
Digital Dimming duty cycle is
controlled by providing either a dc
voltage or a digital PWM signal to the
BRITE_D pin. Burst frequency can
be controlled either by the on chip
burst oscillator or directly by a low
frequency PWM logic signal at
BRITE_D.
The LX1697 includes a built in
5.1V regulator so it can be operated
directly from the battery without the
need of an external 5V supply from
the system. The controller’s power
APPLICATIONS
Note Book LCD displays
Transportable Computers
Web Tablet LCD displays
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected by U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; 7,112,929; Patents Pending
PRODUCT HIGHLIGHT
BATTERY VOLTAGE
( 7V – 25V)
VBAT
VDD
VBAT
ON
OFF
VBH
BOH
BOL
ENABLE
VBAT
VBS
BLIM
BRITE_D
PGND
LX1697
VAH
AOH
AOL
GND
MIN_BRITE
R_BST
R_LMP
DIM_MODE
C_VCO
VDD
VAS
ISNS
VSNS
LX1697
LX1697
PACKAGE ORDER INFO
TA (°C)
LQ
Plastic 24pin MLPQ 4x4mm
RoHS Compliant / Pb-free
-20 to 70
LX1697CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1697CLQ-TR)
Copyright © 2007
Rev 1.1, 5/5/2008
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
TM
®
Thank you for your interest in Microsemi® Analog Mixed Signal products.
The full data sheet for this device contains proprietary information.
To obtain a copy, please contact your local Microsemi sales representative. The
name of your local representative can be obtained at the following link
http://www.microsemi.com/contact/contactfind.asp
or
Contact us directly by sending an email to:
IPGdatasheets@microsemi.com
Be sure to specify the data sheet you are requesting and include your company
name and contact information and or vcard.
We look forward to hearing from you.
Copyright
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
WWW . Microsemi .C OM
INFORMATION