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www.rohm.com

2011.6 - 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)

BD6586MUV

●

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

Ratings

Unit

Condition

Maximum applied voltage 1

VMAX1

7

V

VBAT, EN1, EN2, TRSW,

PWM,TESTO, ISET, TEST

Maximum applied voltage 2

VMAX2

25

V

LED1, LED2, LED3, LED4,

Maximum applied voltage 3

VMAX3

30.5

V

SW

Maximum applied voltage 4

VMAX4

50.5

V

VDET

Power dissipation 1

Pd1

500

*1

mW

Power dissipation 2

Pd2

780

*2

mW

Power dissipation 3

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 0mm

*3

4 layer (JEDEC Compliant board) has been mounted.

Copper foil area 1layer 6.28mm

No.11040ECT35