bd6581gu ROHM Co. Ltd., bd6581gu Datasheet - Page 25

• Manufacturer Part Number: bd6581gu
• Description: White Backlight Led Driver
• Manufacturer: ROHM Co. Ltd.

BD6581GU
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
RTR020N05
51mΩ
Control LED current to charged D/A voltage.
Show application example and typ control.
Please decide final value after you evaluated application, characteristic.
10μF
ON/OFF
Power
Battery
1μF
4.7μH
Fig.61 Analog style optical application
2.2μF *
GND
SENSP
SENSN
PWMPOW
PWMDRV
SW
RSTB
VREG
VBAT
GND
GND
GND
TEST
FAILSEL
ISETH
470kΩ
ISETL
D/A
LED1
LED2
LED3
LED4
LED5
LED6
VDET
24kΩ
Each 20mA
8LED x 6 parallel
25/26
typ LED current =
LED current =
D/A
0.05V
0.2V
0.4V
0.5V
0.6V
0.7V
LED current
19.4mA
14.4mA
7.7mA
4.4mA
1.0mA
0mA
ISET voltage
470kΩ
470kΩ
0.6V
+
+
ISET voltage -D/A
0.6V-D/A
24kΩ
24kΩ
2010.03 - Rev.A
Technical Note
×800
×800