A8740
Ultra Small Mobile Phone Xenon Photoflash
Capacitor Charger with IGBT Driver
Recommended Layout
VBAT
Schematic
C2
10 μF
C4
0.1 μF
R10
2 kΩ
C5
1 nF
6
VBAT
7
VIN_DRV
1
DONE
8
CHARGE
A8740
GND
4
5
SW
3
GATE
2
TRIG
C6
1 nF
D1
T1
RG
12 Ω
VOUT
COUT
100 μF
Top side
Bottom side
Top components
Allegro MicroSystems, Inc.
15
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com