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LT1239 - Backup Battery Management Circuit

Datasheet Summary

Description

The LT ® 1239 is a micropower backup battery management system for portable computers and instrumentation.

It contains two regulators for regulating the battery voltage and memory voltage and a comparator for switching between main power and backup power.

Features

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Datasheet Details

Part number LT1239
Manufacturer Linear Technology
File Size 246.23 KB
Description Backup Battery Management Circuit
Datasheet download datasheet LT1239 Datasheet
Additional preview pages of the LT1239 datasheet.

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Full PDF Text Transcription

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LT1239 Backup Battery Management Circuit FEATURES s s s s s s s s s s s s DESCRIPTION The LT ® 1239 is a micropower backup battery management system for portable computers and instrumentation. It contains two regulators for regulating the battery voltage and memory voltage and a comparator for switching between main power and backup power. The first regulator provides a constant voltage charge for the backup batteries and is adjustable from 3.75V up to 20V. An equalization amplifier combined with the first regulator provides precision charge equalization for a 2-cell lithium-ion system. A second regulator with 4.85V output provides a regulated backup battery voltage to the memory when main power is lost.
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