ST7920
Voltage Doubler
VOUT
Voltage Doubler
Reference Voltage
Vss
VD2
CAP1M
CAP1P
CAP2M
CAP2P
CAP3M
VOUT
VOUT vs. VD2
10
9
Do not operate in this area.
8
7
6
5
4
3
2
1
0
5 4.8 4.6 4.4 4.2 4 3.8 3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 2 1.8
VD2 (V)
Voltage Doubler mode: VD2 & Vout output characteristic
Notes:
l Total resistance of the Follower deviding resistors should larger than 20K Ohm.
l Booster Capacitor uses 4.7uF
l Panel size: 80mm x 28mm (check display)
V4.0
9/49
2008/08/18