BD6583MUV-A 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD6583MUV-A

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

ROHM Semiconductor 

BD6583MUV-A

Technical Note

●Attention point of board layout

In board pattern design, the wiring of power supply line should be low Impedance, and put the bypass capacitor if necessary.

Especially the wiring impedance must be lower around the DC/DC converter.

●About heat loss

In heat design, operate the DC/DC converter in the following condition.

(The following temperature is a guarantee temperature, so consider the margin.)

1. Periphery temperature Ta must be less than 85 ℃.

2. The loss of IC must be less than dissipation Pd.

●Application example

 LED current setting controlled ISETH resistor.

24kΩ : 20mA

30kΩ : 16mA

19.6kΩ : 24.5mA

33kΩ : 14.5mA

 Brightness control

Please input PWM pulse from PWMPOW or PWMDRV terminal.

Please refer electrical characteristic p.3 and function (p.12).

15inch panel

Battery

10μF

4.7μH

2.2μF *

10LED x 6 parallel

RTR020N05

47mΩ

Power

ON/OFF

100Hz~10kHz

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

Each 20mA

Can be set up to each 10 ~25mA

Fig.46 10 series×6 parallel, LED current 20mA setting

Current driver PWM application

13~14inch panel

Battery

10μF

4.7μH

2.2μF *

8LED x 6 parallel

RTR020N05

51mΩ

Power

ON/OFF

100Hz~1kHz

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

Each 20mA

Can be set up to each 10~25mA

Fig.47 8 series× parallel, LED current 20mA setting

Power control PWM application

Battery

10μF

4.7μH

2.2μF *

8LED x 6 parallel

RTR020N05

51mΩ

Power

ON/OFF

100Hz~10kHz

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

Each 20mA

Can be set up to each 10~25mA

Fig.48 8 series×6 parallel, LED current 20mA setting

Current driver PWM application

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

19/26

2011.06 - Rev.C

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