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ICL7673_14 Datasheet, PDF (6/7 Pages) Intersil Corporation – Automatic Battery Back-Up Switch
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ICL7673
MAIN
SUPPLY
3V
BACKUP
SUPPLY
R2
PNP
PNP
R1
R4
VP
1
8
VO
NC
P-
ICL7673 6
VS
S-
R3
(NOTE 4)
EXTERNAL
EQUIPMENT
2 GND 3
+
-
NOTE 4. > 1MW
FIGURE 11. HIGH CURRENT BATTERY BACKUP SYSTEM
RF
RS
MAIN
SUPPLY
GND
+
BATTERY
BACKUP
-
VP
8
ICL7673
VS
S-
2
3
GND
VO
GND
FIGURE 12. LOW CURRENT BATTERY BACKUP SYSTEM WITH HYSTERESIS
R2
PNP
+V
MAIN
SUPPLY
MAIN
SUPPLY
GND
PNP
RF
R1
R4
RS
VP
8
1
NC
P-
ICL7673 6
VS
S-
2
3
4
+
BACKUP
- SUPPLY
R3
EXTERNAL
EQUIPMENT
FIGURE 13. HIGH CURRENT BACKUP SYSTEM WITH HYSTERESIS
6
FN3183.4
July 22, 2005
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