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BD6590MUV_11

Description
SWITCHING REGULATOR, QCC24
CategoryPower/power management   
File Size887KB,27 Pages
ManufacturerROHM Semiconductor
Websitehttps://www.rohm.com/
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BD6590MUV_11 Overview

SWITCHING REGULATOR, QCC24

LED Drivers for LCD Backlights
White Backlight LED Driver
for Medium to Large LCD Panels
(Switching Regulator Type)
BD6590MUV
No.11040EBT14
●Description
BD6590MUV is white LED driver IC with PWM step-up DC/DC converter that can boost max 40V and current driver that can
drive max 30mA. The wide and precision brightness can be controlled by external PWM pulse.
BD6590MUV 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=1.25MHz)
2) High accuracy & good matching current drivers (MAX30mA/ch)
3) Integrated 50V power Nch MOSFET
4) Soft start
5) Drive up to 10 in series 6strings in parallel
6) Input voltage range (4.5V ~ 5.5V)
7) Rich safety functions
・Over-voltage
protection
・Over
current limit
・LED
terminal open/short protect
・External
SBD open detect / Output short protection
・UVLO
・Thermal
shutdown
8) Small & thin package (VQFN024V4040) 4.0 × 4.0 × 1.0mm
●Applications
All middle size LCD equipments backlight of Notebook PC, NetPC,portable DVD player, DPF, etc.
●Absolute
Maximum Ratings (Ta=25℃)
Parameter
Maximum applied voltage 1
Maximum applied voltage 2
Maximum applied voltage 3
Power dissipation 1
Power dissipation 2
Power dissipation 3
Operating temperature range
Storage temperature range
Symbol
VMAX1
VMAX2
VMAX3
Pd1
Pd2
Pd3
Topr
Tstg
Ratings
7
25
41
500
780
1510
-40 ~ +85
-55 ~ +150
Unit
V
V
V
mW
mW
mW
Condition
VBAT, ISET, TEST, RSTB, PWMDRV
PWMPOW, VDET, FAILFLAG, OCPSET
LED1, LED2, LED3, LED4, LED5, LED6
SW
*1
*2
*3
-
-
*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
2
, 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 6.28mm
2
, Copper foil area 2~4layers 5655.04mm
2
,
When it’s used by more than Ta=25℃, it’s reduced by 12.1mW/℃.
●Recommended
Operating Range (Ta=-40℃ ~ +85℃)
Parameter
Power supply voltage
Symbol
VBAT
Limits
Min.
4.5
Typ.
5.0
Max.
5.5
Unit
V
Condition
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/26
2011.07 - Rev.B

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