Sample Circuits (S1F77200Y Series) - Epson Power Supply IC S1F70000 Technical Manual

SAMPLE CIRCUITS (S1F77200Y Series)

CR timer circuit
When the S1F77200Y circuit is configured as shown in Figure 5-16, it can be used as a CR timer circuit.
Battery backup circuit
The following is an example of the supply voltage switching circuit for the battery backup configured featuring the
S1F77200Y series.
V
DD
S1F70000 Series
Technical Manual
V
DD
R
V
DD
S1F77200Y
C
Figure 5-16 CR timer circuit
PNP transistor
V
DD
V
O
S1F77200Y
V
SS
Figure 5-17 Battery backup circuit
EPSON
V
DD
OUT
V
O
V
SS
V
CC
V
BAT
NPN transistor
Enable signal
S1F77200Y Series
5–21