LM2601 Datasheet | National Semiconductor

LM2601 Adapter Interface Circuit April 2001 LM2601 Adapter Interface Circuit General Description The Adapter Interface Circuit (AIC) is used to sense the presence of an external power source for a portable puter. It notifies the puter if a source is present and indicates if the source is appropriate for charging battery packs inside the puter. The AIC also senses an adapter current and its direction. AIC isolates the adapter and signals the puter when peak current threshold is exceeded. LM2601 drives P-channel FETs. No high current rated Schottky diode is required to implement an adapter switchover circuit. This significantly decreases additional heat dissipation during simultaneous fast battery charging while running a puter, particularly in Maximum Performance mode of operation n LM2601 shuts down automatically when adapter is removed n Low leakage current from battery when not powered n Drives P-channel FETs, no Schottky diodes are required n No reverse inrush current from battery into the adapter output capacitance n Allows for battery capacity gas-gauge calibration under system software/firmware control n Adapter over current threshold programmable with external resistors n Wide input range: 5V - 24V n Available in TSSOP-14 package Applications n Portable puters n Portable IAs (Internet Appliances, Information Appliances) n Other Battery Powered Devices Features n Detects an AC-DC adapter suitable for battery charging or an airplane or car power line adapter that should not be used for battery charging n Allows the implementation of intelligent switchover circuits for portable systems Block Diagram © 2001 National Semiconductor Corporation DS101309 .national. Pin Configuration TSSOP-14 Ordering Information Order Number LM2601MTC LM2601MTCX Package Number MTC14 MTC14 Package Type TSSOP-14 TSSOP-14 Supplied As- Rail (94 Units/Rail) Tape and Reel (2500 Units/Reel) - Partial Rails are available, there...