BATTERY
CHARGE CONTROLLER
Janaury 30, 1998
TYPICAL APPLICATIONS
Step-Down High-Side Current Sense Battery Charger
SC1766
NOTE:
RSENSE = 0.1 ohm, CHARGE CURRENT = 0.5A ±10%, VIN > VBAT +3.5V
RSENSE = 0.05 ohm, CHARGE CURRENT = 1.0A ±10%, VIN > VBAT +4.0V
RSENSE = 0.033 ohm, CHARGE CURRENT = 1.5A ±10%, VIN > VBAT +4.5V
EFFICIENCY > 90%, MEASURED AT CS- NODE
Step-Down Rechargeable Battery Charger
NOTE: +VIN should be higher than 10V. Z1 is required when +VIN exceeds 18V. Fast charge current is ap-
proximately 1A, adjustable through R7. Trickle charge current is adjustable through R12.
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320