LM2601MTCEVAL National Semiconductor Corporation, LM2601MTCEVAL Datasheet

LM2601MTCEVAL

Manufacturer Part Number

LM2601MTCEVAL

Description

LM2601 - Adapter Interface Circuit Not Recommended For Designs , Package: Tssop, Pin Nb=14

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM2601MTCEVAL.pdf (6 pages)

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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 com-

puter. It notifies the computer if a source is present and

indicates if the source is appropriate for charging battery

packs inside the computer. The AIC also senses an adapter

current and its direction. AIC isolates the adapter and signals

the computer when peak current threshold is exceeded.

LM2601 drives P-channel FETs. No high current rated

Schottky diode is required to implement an adapter switcho-

ver circuit. This significantly decreases additional heat dissi-

pation during simultaneous fast battery charging while run-

ning a computer, particularly in Maximum Performance

mode of operation

Features

n Detects an AC-DC adapter suitable for battery charging

n Allows the implementation of intelligent switchover

Block Diagram

or an airplane or car power line adapter that should not

be used for battery charging

circuits for portable systems

DS101309

n LM2601 shuts down automatically when adapter is

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

n Allows for battery capacity gas-gauge calibration under

n Adapter over current threshold programmable with

n Wide input range: 5V - 24V

n Available in TSSOP-14 package

Applications

n Portable Computers

n Portable IAs (Internet Appliances, Information

n Other Battery Powered Devices

removed

output capacitance

system software/firmware control

external resistors

Appliances)

10130901

www.national.com

April 2001

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