AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Application Circuits
C1 = 1μF
C2 = 1μF
C1+ C1- C2+
VIN
C2-
VIN
VOUT
CIN=10μF
COUT=10μF
VOUT
EN1
EN2
D1
D2
D3
D4
Flash LED
GND
R2=10
Q1
TPULSE
100ms - 500ms
Figure 1: Flash Application.
C1 = 1μF
C1+ C1- C2+
VIN
C2 = 1μF
C2-
VIN
VOUT
CIN=10μF
COUT=10μF
VOUT
Light/Movie
Mode Enable
EN1
EN2
D1
D2
D3
D4
Flash LED
GND
R3=60 - 100
R2=10
LL4148
R1
2K
Q1
TPULSE
Flash Enable
C3
0.1μF
Figure 2: Movie Mode Light with Flash Function.
14
3112.2007.01.1.5