Sample circuits (s1f77210y series), Epson – Epson Power Supply S1F70000 User Manual
Page 220
S1F77200Y Series
5–20
EPSON
S1F70000 Series
Technical Manual
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.
Figure 5-14 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.
Figure 5-15 Battery backup circuit
V
DD
V
DD
V
O
V
SS
OUT
R
C
S1F77210Y
V
DD
V
CC
V
BAT
V
DD
V
O
V
SS
PNP transistor
NPN transistor
Enable signal
S1F77210Y