Sample circuits (s1f77200y series), Epson – Epson Power Supply S1F70000 User Manual
Page 221
S1F70000 Series
EPSON
5–21
Technical Manual
S1F77200Y Series
S1F77200Y
Series
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.
Figure 5-16 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.
Figure 5-17 Battery backup circuit
V
DD
V
CC
V
BAT
V
DD
V
O
V
SS
PNP transistor
NPN transistor
Enable signal
S1F77200Y
V
DD
V
DD
V
DD
V
O
V
SS
OUT
R
C
S1F77200Y