LOW VOLTAGE MULTI-MODE
DC-DC CONVERTER
January 30, 1998
TYPICAL APPLICATIONS (cont.)
Step-Up Rechargeable Battery Charger
SC1630
• Charging current =0.8A, Auto Cut-Off at 0.25% -Delta-V point and fault conditions (RIF sets the charging current).
• VDD must be lower than VBAT.
• Short circuit condition is protected with a 2A fuse.
Step-Up/Step-Down Rechargeable Battery Charger
• Fast charge current =0.8A when VDD<VBAT, = (VDD-VBAT-0.5)/0.82 when VDD>VBAT.
• Trickle charge current = 30mA (RIF sets fast charge current, RIT sets trickle charge current).
• Typical efficiency = 75%.
• With short circuit protection.
TYPICAL PERFORMANCE CHARACTERISTICS
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320