SGM3133 Datasheet, PDF (8/13 Pages) SG Micro Corp – Driver with Low Dropout Current Source

SGM3133
TYPICAL APPLICATION
4-Channel Charge Pump White LED Driver
with Low Dropout Current Source
C1
C2
1µF
1µF
4
7
9
6
2.8V to 5.5V
+
C_IN
1µF
EN/SET
C1P C1N C2P C2N
5,13
VIN
LED4 ¹
LED3 ¹⁶
12
SGM3133
EN/SET
LED2
LED1
15
14
8 _VOUT
C_OUT
1µF
GND
3,10
Figure 1. For 4-WLEDs Application Circuit
30µs < t_READY 0.5µs < t_HI
0.5µs < t_LO < 500µs
2.5ms < t_SHDN
EN
0
1
2
3
4
5
Shutdown
I_LEDx
100% _{15/16 14/16 13/16 12/16}
14 15 0
1
100%
2/16 _1/16
15/16
Figure 2. Brightness Control by Pulse Dimming
Shutdown
SG Micro Corp
www.sg-micro.com
8