BD6586MUV_11 Datasheet, PDF (1/20 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)
BD6586MUV
No.11040ECT35
●Description
BD6586MUV is white LED driver IC with PWM step-up DC/DC converter that can boost max 24V and current driver that can
drive max 25mA. The wide and precision brightness can be controlled by external PWM pulse.
BD6586MUV 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)
2) High accuracy & good matching (±3.0%) current drivers 4ch (MAX.25mA/ch)
3) 28V power Nch MOSFET
4) Soft Start
5) Drive up to 6 in series, 4 strings in parallel
6) Rich safety functions
▪ Over-voltage protection
▪ Output Short protection
▪ External SBD open detect
▪ Over current limit
▪ Thermal shutdown
▪ UVLO
7) 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 VMAX2
Ratings
7
25
Unit
Condition
V
VBAT, EN1, EN2, TRSW,
PWM,TESTO, ISET, TEST
V LED1, LED2, LED3, LED4,
Maximum applied voltage 3 VMAX3
30.5
V SW
Maximum applied voltage 4
Power dissipation 1
VMAX4
Pd1
50.5
500 ^*1
V VDET
mW
Power dissipation 2
Power dissipation 3
Pd2
780 ^*2
mW
Pd3
1510 ^*3
mW
Operating temperature range Topr
-40 ~ +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/ ℃.
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2011.6 - Rev.C