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BD1204GWL Fiches technique(PDF) 1 Page - Rohm

No de pièce BD1204GWL
Description  Backlight LED Driver for Small LCD Panels (Charge Pump Type)
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
Logo ROHM - Rohm

BD1204GWL Fiches technique(HTML) 1 Page - Rohm

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www.rohm.com
2010.02 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
LED Drivers for LCD Backlights
Backlight LED Driver
for Small LCD Panels (Charge Pump Type)
BD1204GWL
Description
BD1204GWL is 3ch or 4ch parallel LED driver for the portable instruments.
This IC is equipped with an automatic transition charge pump and 16-step LED drivers. Hence this IC realizes high efficiency
and high accuracy drive of LEDs. Additionally, this IC can synchronize LED drive with external PWM signal. This IC is best
suited to turn on white LEDs that require high-accuracy LED brightness control.
Features
1) 3ch or 4ch parallel LED driver is mounted
2) 16-step LED current adjust function
3) LED current matching is 5: 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, ×2)
6) High efficiency achieved (Maximum over 93%)
7) It transits for the most suitable power operating by the LED terminal processof the 4th light when 3 light driving
8) Various protection functions such as output voltage protection and thermal shutdown circuit are mounted.
9) The input external PWM is possible and the back light control interlocked with the motion picture is possible.
10) Package: UCSP50L1 (Thick 0.55mm MAX, Pin pitch 0.4mm) CSP14pin package
Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Ratings
Unit
Power supply voltage
VMAX
7
V
Input voltage ( EN , PWMIN )
Vdin
GND-0.3 ~ VBAT+0.3
V
Power dissipation
Pd
840
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 6.72mW/℃
if Ta is higher than or equal to 25℃.
Operating Conditions (Ta = -30 ~ 85 ℃)
Parameter
Symbol
Limits
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.
No.10040EAT07


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