BD6592MUV_11 Datasheet, PDF (1/26 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)
BD6592MUV
No.11040ECT33
●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
Maximum applied voltage 1
VMAX1
Maximum applied voltage 2
Maximum applied voltage 3
Power dissipation 1
Power dissipation 2
Power dissipation 3
VMAX2
VMAX3
Pd1
Pd2
Pd3
Ratings
7
25
50.5
500
780
1510
Unit
Condition
TEST, VREG, SENSP, SENSN, SW,
V RSTB, PWMPOW, PWMDRV,
FAILSEL, ISETH, ISETL
V
LED1, LED2, LED3, LED4, LED5,
LED6, VBAT
V VDET
mW ^*1
mW ^*2
mW ^*3
Operating temperature range
Topr
-30 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
*1 Reduced 4.0mW/℃ With Ta>25℃ when not mounted on a heat radiation Board.
*2 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/℃.
*3 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℃)
Parameter
Ratings
Symbol
Unit
Min. Typ. Max.
Power supply voltage
VBAT
2.7 12.0 22.0
V
Condition
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2011.06 - Rev.C