SGM3142 Datasheet, PDF (8/14 Pages) SG Micro Corp – Driver with Low Dropout Current Source

SGM3142
TYPICAL APPLICATION
6-Channel Charge Pump White LED Driver
with Low Dropout Current Source
VBattery
+
C1
C2
1µF
1µF
6
7
10
11
C1P C1N C2P C2N
14
VIN
16
LED1
1
CIN
1μF
9
LED2
VOUT
4
COUT
1μF
SGM3142
LED3
LED4
5
LED5 ²
EN/SET
15 _EN/SET
GND
LED6 ³
12
Figure 1. For 6-WLEDs Application Circuit
30µs < t_READY 0.5µs < t_HI
0.5µs < t_LO < 75µs
500µs < t_SHDN
EN
0
1
2
3
45
Shutdown
I_LEDx
1/16 ^{2/16 3/16 4/16 5/16}
14 15 0
1
15/16 ^100%
1/16 ^2/16
Shutdown
Figure 2. Brightness Control by Pulse Dimming
SG Micro Corp
8
www.sg-micro.com