Active-Semi's ACT2801C/02C Battery Backup Pack Managers are space-saving and high-performance low-profile single-chip solutions for backup battery pack and standalone battery charger. Each device integrates all the functions that a backup battery pack needs, including switching charger, boost converter and LED indication. They operate at 1.1MHz for switching charger and 0.55MHz for boost converter allowing tiny external inductor and capacitors. Each IC provides a direct power path from input to output with programmable current limit while providing power to switching charger. Output has higher priority than battery charger if the programmed input current limit is reached. They charge the battery with full cycle of preconditioning, fast charge with constant current and constant voltage until end of charge. The battery charger is thermally regulated at 110°C with charge current foldback.