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LED Drivers for LCD Backlights
Backlight LED Drivers
for Small LCD Panels (Charge Pump Type)
BD1604MUV, BD1604MVV
No.11040EBT23
● Description
This LSI is a 4 white LED driver for small LCD backlight. At the charge pump type, the number of external devices is
minimized.
● Features
1) 4 parallel LED driver is mounted.
2) The LED current can be controlled via an external resistance.
3) Maximum current is 120mA (30mA × 4).
4) LED1 to LED4 can be turned on or off via an external control pin.
5) The relative current accuracy among LEDs (LED1 to LED4) is 3%.
6) Automatically transition to each mode (×1.0, ×1.5, ×2.0).
7) High efficiency (90% or more at maximum) is achieved.
8) Various protection functions such as output voltage protection function, current overload limiter and thermal shutdown
circuit are mounted.
● Applications
This driver provides for:
- Backlight using white LED
- Auxiliary lights for mobile phone cameras and simplified flash
● Lineup
Parameter
Number of LED channels
Maximum current
Package
● Absolute Maximum Rating (Ta=25 ℃ )
BD1604MUV
4ch
120mA
VQFN016V3030
3.00mm×3.00mm
BD1604MVV
4ch
120mA
SQFN016V4040
4.00mm×4.00mm
700 *
Parameter
Power supply voltage
BD1604MUV
Allowable loss
BD1604MVV
Operating temperature range
Storage temperature range
Symbol
Vmax
Pd
Topr
Tstr
Ratings
7
1
780 * 2
－ 30~85
－ 55~150
Unit
V
mW
℃
℃
*1
*2
When a glass epoxy substrate (70mm×70mm×1.6mm) has been mounted, this loss will decrease 5.6mW/ ℃ if Ta is higher than or equal to 25 ℃ .
When a glass epoxy substrate (70mm×70mm×1.6mm) has been mounted, this loss will decrease 6.24mW/ ℃ if Ta is higher than or equal to 25 ℃ .
● Recommended Operation Range
Parameter
Operating supply voltage
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
Symbol
VBAT
Limits
2.7 ～ 5.5
1/10
Unit
V
Condition
VBAT voltage
2011.06 - Rev.B
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