BD82103GWL_11 Datasheet, PDF (1/10 Pages) Rohm – Backlight LED Driver for Small LCD Panels (Charge Pump Type)

LED Drivers for LCD Backlights
Backlight LED Driver
for Small LCD Panels (Charge Pump Type)
BD82103GWL
No.11040EBT34
●Description
BD82103GWL is charge pump type 2 light or 3 light parallel LED driver for the portable instruments.
This IC not only ensures efficient boost by automatically changing the boost rate but also works as a constant current driver
in 16 steps, so that the driving current can be adjusted finely. This IC is best suited to turn on white LEDs that require
high-accuracy LED brightness control.
●Features
1) 2light or 3light parallel LED driver is mounted
2) 16-step LED current adjust function
3) Inter-LED relative current accuracy: 5% or less
4) Driving control via a single-line digital control interface
5) Automatic transition charge pump type DC/DC converter (×1,×1.5, x2)
6) High efficiency achieved (Maximum over 93%)
7) It transits for the most suitable power operating by the LED terminal process
of the 3rd light when 2 light driving
8) Various protection functions such as output voltage protection and thermal shutdown circuit are mounted.
9) Package : UCSP50L1 (Thick 0.55mm MAX, Pin pitch 0.4mm) CSP11pin package
●Absolute Maximum Ratings (Ta=25℃)
Parameter
Symbol
Ratings
Unit
Power supply voltage
VMAX
7
V
Input voltage ( EN )
Vdin
GND-0.3 ~ VBAT+0.3
V
Power dissipation
Pd
730
mW
Operating temperature range
Topr
-30 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
Note 1) The measurement value which was mounted on the PCB by ROHM.
When a glass epoxy substrate (70mm × 70mm × 1.6mm) has been mounted, this loss will decrease
5.84mW/℃ if Ta is higher than or equal to 25℃.
●Operating Conditions (Ta = -30 ~ 85 ℃)
Parameter
Symbol
Ratings
Unit
Operating power supply voltage VBAT
2.7 ~ 5.5
V
*This chip is not designed to protect itself against radioactive rays.
*This material may be changed on its way to designing.
*This material is not the official specification.
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2011.06 - Rev.B