BD6581GU
Control LED current to charged D/A voltage.
Show application example and typ control.
Please decide final value after you evaluated application, characteristic.
Battery
Datasheet
10 μ F
4.7 μ H
2.2 μ F *
8LED x 6 parallel
RTR020N05
51m ?
Power
ON/OFF
SW
SENSP
SENSN
RSTB
PWMPOW
PWMDRV
VBAT
FAILSEL
VDET
LED1
LED2
LED3
LED4
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
LED5
1 μ F
VREG
GND GND GND GND TEST ISETH ISETL LED6
Each 20mA
LED current =
I SET   voltage
470k ?
+
ISET voltage -D/A
24k ?
×800
470k ?
24k ?
D/A
typ LED current =
0.6V
470k ?
+
0.6V-D/A
24k ?
×800
Figure 62. Analog style optical application
* Please select the capacitor which the little bias fluctuation.
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TSZ22111 ? 15 ? 001
29/32
TSZ02201-0G3G0C400170-1-2
03.Dec.2012 Rev.001
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