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SGM3122 Datasheet, PDF (5/17 Pages) SG Micro Corp – PWM Brightness Control
SGM3122
TYPICAL APPLICATION
White LED Charge Pump Current
Source with PWM Brightness Control
C2
0.47μF
C1
0.47μF
Li-ion +
Battery -
CIN
1μF
C2- C1-
VIN
C1+ C2+
VOUT
EN1 SGM3122
D4
D3
EN2
D2
D1
ISET GND PGND
RSET
COUT
1μF
FUNCTIONAL BLOCK DIAGRAM
1µF
C1+
0.47µF
C1-
C2+
0.47µF
C2-
VIN
VOUT
Charge
Pump
1µF
Reference
EN1
EN2
PGND
GND
Current
Sinks
Control
D4
D3
D2
D1
ISET
RSET
SG Micro Corp
5
www.sg-micro.com