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A4054A

AiT Semiconductor
Part Number A4054A
Manufacturer AiT Semiconductor
Description 800mA STANDALONE LINEAR Li-ion BATTERY CHARGER
Published Jun 2, 2015
Detailed Description AiT Semiconductor Inc. www.ait-ic.com A4054A 800mA STANDALONE LINEAR Li-ion BATTERY CHARGER THERMAL REGULATION DESCRIP...
Datasheet PDF File A4054A PDF File

A4054A
A4054A

Overview
AiT Semiconductor Inc.
www.
ait-ic.
com A4054A 800mA STANDALONE LINEAR Li-ion BATTERY CHARGER THERMAL REGULATION DESCRIPTION The A4054A is a complete constant current / constant voltage linear charger for single cell Lithium-Ion batteries.
No external sense resistor is needed, and no blocking diode is required due to the internal 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.
2V, and the charge current can be programmed externally with a single resistor.
The A4054A automatically terminates the charge cycle when the charge current drops to 1/10 the programmed value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is removed, the A4054A automatically enters a low current state, dropping the battery drain current to less than 2μA.
The A4054A can be put into shutdown mode, reducing the supply current to 25μA.
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