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BD6583MUV-A

White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type)

ROHM Semiconductor 

BD6583MUV-A

●Application example

Battery

10μF

4.7μH

2.2μF *

RTR020N05

100mΩ

Power

ON/OFF

200Hz

PWM

1μF

SW

SENSP

SENSN

FAILSEL

VDET

RSTB

PWMPOW

LED1

PWMDRV

VBAT

LED2

LED3

LED4

VREG

LED5

GND GND GND GND TEST ISETH ISETL LED6

24kΩ

10LED x 6parallel

Each 20mA

Technical Note

Battery

10μF

4.7μH

2.2μF *

RTR020N05

150mΩ

Power

ON/OFF

200Hz

PWM

1μF

SW

SENSP

SENSN

FAILSEL

VDET

RSTB

PWMPOW

LED1

P W MDRV

VBAT

LED2

LED3

LED4

VREG

LED5

GND GND GND GND TEST ISETH ISETL LED6

24kΩ

10LED x 4aprallel

Each 20mA

Fig.25 10 series × 6parallel

H current 20mA setting

Current driver PWM application

Fig.26 10 series × 4parallel

H current 20mA setting

Current driver PWM application

* Please select the capacitor which the little bias fluctuation.

Battery

Battery

10μF

4.7μH

2.2μF *

RTR020N05

100mΩ

Power

ON/OFF

200Hz

PWM

1μF

SW

SENSP

SENSN

FAILSEL

VDET

RSTB

PWMPOW

LED1

PWMDRV

VBAT

LED2

LED3

LED4

VREG

LED5

GND GND GND GND TEST ISETH ISETL LED6

24kΩ

10LED x 6parallel

Each 20mA

10μF

4.7μH

2.2μF *

RTR020N05

100mΩ

Power

ON/OFF

200Hz

PWM

2.7V to 5.5V

1μF

SW

SENSP

SENSN

FAILSEL VDET

RSTB

PWMPOW

LED1

PWMDRV

VBAT

LED2

LED3

LED4

VREG

LED5

GND GND GND GND TEST ISETH ISETL LED6

24kΩ

10LED x 6parallel

Each 20mA

Fig.27 10 series × 6parallel LED

Fig.28 Non-used Inside REG or operating

current 20mA setting Power control PWM application

under 5V application

* Please select the capacitor which the little bias fluctuation.

●Terminal processing

TEST pin= Connect to GND

N.C. = Nothing specified in particular. Open is recommended.

VREG= When IC is driving from the outside of 2.7~5.5V, short VBAT and VREG, and put the voltage to VREG

FAILSEL, PWMDRV= Connect to GND in case of fixing at L level. Connect to VREG of IC or the power supply of more

than 1.4V in case of fixing at H level .

LED1-6= When each LED driver are not used, connect to GND of IC

GND = Each GND is connecting inside IC, but, connect to GND of all board

RSTB= RSTB is used as a power supply of internal circuit.

So, you mustn’t input RSTB voltage with pull up resistor of several kΩ.

And, please care about the relation between VBAT and RSTB enough. (ref. P9)

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

7/26

2011.06 - Rev.C

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