BD6581GU Datasheet, PDF (1/27 Pages) Rohm – White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type)

LED Drivers for LCD Backlights
White Backlight LED Driver
for Medium to Large LCD Panels
(Switching Regulator Type)
BD6581GU
No.10040EAT13
●Description
BD6581GU is white LED driver IC with PWM step-up DC/DC converter that can boost max 42.5V and current driver that can
drive max 25mA. The wide and precision brightness can be controlled by external PWM pulse.
BD6581GU has very accurate current drivers, and it has few current errors between each strings.
So, it will be helpful to reduce brightness spots on the LCD.
Small package type is suited for saving space.
●Features
1) High efficiency PWM step-up DC/DC converter (fsw=1MHz), max efficiency 93%
2) High accuracy & good matching (±1.5%) current drivers 6ch
3) Drive up to 12^＊ in series, 6 strings in parallel =72 white LEDs (^＊white LED Vf=3.5Vmax)
4) Wide input voltage range (2.7V ~ 22V)
5) Rich safety functions
・Over-voltage protection (OVP)
・Over current limit
・External SBD open detect
・Thermal shutdown
6) Small & thin package (VCSP85H2) 2.6×2.6×0.85mm
●Absolute Maximum Ratings
All middle size LCD equipments backlight of Notebook PC, portable DVD player, car navigation systems, etc.
Parameter
Symbol
Ratings
Unit
Condition
Maximum applied voltage 1 VMAX1
7
V
TEST, VREG, SENSP, SENSN, SW, RSTB,
PWMPOW, PWMDRV, FAILSEL, ISETH, ISETL
Maximum applied voltage 2 VMAX2
25
V LED1, LED2, LED3, LED4, LED5, LED6, VBAT
Maximum applied voltage 3 VMAX3
50.5
V VDET
Power dissipation 1
Pd1
1100
mW
Operating temperature range Topr
-30 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
(*1) This value is the measurement value that was mounted on the PCB by ROHM.
Temperature deleting: 8.8mW/ ℃ from Ta>25℃
●Recommended Operating Range (Ta=-30℃ ~ +85℃)
Parameter
Symbol
Min.
Limits
Typ.
Max.
Unit
Power supply voltage
VBAT
2.7
12.0 22.0 V
*1
-
-
Condition
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2010.03 - Rev.A