1/26

www.rohm.com

2011.06 - Rev.C

© 2011 ROHM Co., Ltd. All rights reserved.

LED Drivers for LCD Backlights

White Backlight LED Driver

for Medium to Large LCD Panels

(Switching Regulator Type)

BD6583MUV-A

●

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

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

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

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 0mm

(*3)

4 layer (JEDEC Compliant board) has been mounted.

Copper foil area 1layer 6.28mm

●

Recommended operating range (Ta=-30 ℃ ~ +85 ℃)

Parameter

Symbol

Ratings

Unit

Condition

Min.

Typ.

Max.

Power supply voltage

VBAT

2.7

12.0

22.0

V

No.11040ECT32