LED Drivers for LCD Backlights
White Backlight LED Driver
for Medium to Large LCD Panels
(Switching Regulator Type)
No.11040ECT33
BD6592MUV
●Description
BD6592MUV 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 40mA. The wide and precision brightness can be controlled by external PWM pulse. BD6592MUV 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 (±3%) 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 (VQFN024V4040) 4.0 × 4.0 × 1.0mm
●Applications
All middle size LCD equipments backlight of Notebook PC, portable DVD player, car navigation systems, etc.
●Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
VMAX1
VMAX2
Ratings
Unit
V
Condition
TEST, VREG, SENSP, SENSN, SW,
RSTB, PWMPOW, PWMDRV,
FAILSEL, ISETH, ISETL
LED1, LED2, LED3, LED4, LED5,
LED6, VBAT
Maximum applied voltage 1
Maximum applied voltage 2
7
25
V
Maximum applied voltage 3
Power dissipation 1
VMAX3
Pd1
50.5
500
V
VDET
*1
mW
mW
mW
℃
*2
*3
Power dissipation 2
Pd2
780
Power dissipation 3
Pd3
1510
Operating temperature range
Storage temperature range
Topr
Tstg
-30 ~ +85
-55 ~ +150
℃
*1
*2
*3
Reduced 4.0mW/℃ With Ta>25℃ when not mounted on a heat radiation Board.
1 layer (ROHM Standard board) has been mounted. Copper foil area 0mm2, When it’s used by more than Ta=25℃, it’s reduced by 6.2mW/℃.
4 layer (JEDEC Compliant board) has been mounted.
Copper foil area 1layer 6.28mm2, Copper foil area 2~4layers 5655.04mm2, When it’s used by more than Ta=25℃, it’s reduced by 12.1mW/℃.
●Recommended operating range (Ta=-30℃ ~ +85℃)
Ratings
Typ.
Parameter
Symbol
VBAT
Unit
V
Condition
Min.
2.7
Max.
22.0
Power supply voltage
12.0
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2011.06 - Rev.C
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