Sample Circuits (S1F77210Y Series) - Epson Power Supply IC S1F70000 Technical Manual

S1F77200Y Series

SAMPLE CIRCUITS (S1F77210Y Series)

CR timer circuit
When the S1F77210Y circuit configured as shown in Figure 5-14, 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 supply configured featur-
ing the S1F77210Y series.
V
DD
5–20
V
DD
R
V
DD
S1F77210Y
C
Figure 5-14 CR timer circuit
PNP transistor
V
DD
V
O
S1F77210Y
V
SS
Figure 5-15 Battery backup circuit
EPSON
V
O
OUT
V
SS
V
BAT
NPN transistor
V
CC
Enable signal
S1F70000 Series
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