BD6583MUV-A_11 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)
BD6583MUV-A
No.11040ECT32
●Description
BD6583MUV-A 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. BD6583MUV-A 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
VMAX2
Ratings
7
25
Unit
Condition
V
TEST,VREG,SENSP,SENSN,SW,RSTB,
PWMPOW,PWMDRV,FAILSEL,ISETH,ISETL
V LED1, LED2, LED3, LED4, LED5, LED6, VBAT
Maximum applied voltage 3
VMAX3
50.5
V
VDET
Power dissipation 1
Pd1
500
mW
*1
Power dissipation 2
Pd2
780
mW
*2
Power dissipation 3
Pd3
1510
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
Symbol
Ratings
Min. Typ. Max.
Unit
Power supply voltage
VBAT 2.7 12.0 22.0 V
Condition
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2011.06 - Rev.C