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AF4057 - 1.1A Lithium Ion Battery Linear Charger

Datasheet Summary

Description

AF4057 is a complete CC/CV linear charger for single cell lithium-ion batteries.

It is specifically designed to work within USB power Specifications.

No external sense resistor is needed and no blocking diode is required due to the internal P-MOSFET architecture.

Features

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Datasheet preview – AF4057

Datasheet Details

Part number AF4057
Manufacturer AFSEMI
File Size 514.80 KB
Description 1.1A Lithium Ion Battery Linear Charger
Datasheet download datasheet AF4057 Datasheet
Additional preview pages of the AF4057 datasheet.

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Full PDF Text Transcription

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AF4057 1.1A Lithium Ion Battery Linear Charger GENERAL DESCRIPTION AF4057 is a complete CC/CV linear charger for single cell lithium-ion batteries. It is specifically designed to work within USB power Specifications. No external sense resistor is needed and no blocking diode is required due to the internal P-MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature .The charge voltage is fixed at 4.35V, and the charge current can be programmed externally with a single resistor. The AF4057 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
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