ACE4559P

150mA Single Cell Li-ion Battery Charger, 0.1mA Termination, 45nA Battery leakage Current

VER 1.1

1

Description

The ACE4559P series of devices are highly integrated Li-Ion and Li-Pol linear chargers targeted at

small capacity battery for portable applications. It is a complete constant-current/ constant voltage linear

charger. No external sense resistor is needed, and no blocking diode is required due to the internal

MOSFET architecture. It can deliver up to 150mA of charge current (using a good thermal PCB layout)

with a final float voltage accuracy of ±1%. The charge voltage is fixed at 4.2V or 4.35V, and the charge

current can be programmed externally with a single resistor. The charger function has high accuracy

current and voltage regulation loops and charge termination.

The ACE4559P 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 ACE4559P will shut off, only 40nA

leakage current coming from battery at sleep mode when ambient temperature is 85℃, so it can save

energy and improve standby time.

The ACE4559P is available in a small package with TDFN1X1-6L. Standard product is Pb-Free and

Halogen-free.

Features

Charging



1% Charge Voltage Accuracy



5% Charge Current Accuracy



Support Application for Very Low Charge Currents – 1mA to 150mA



Support minimum 0.1mA Charge Termination Current



45nA Maximum Battery Output Leakage Current @ 0℃~85℃



High Voltage Chemistry Support: up to 4.35V

Others



Output Short-Circuit Protection



Soft-Start Limits Inrush Current



Charge Status Output Pin



Automatic Recharge

Application



Fitness Accessories



Smart Watches



Bluetooth Handsets



Wireless Low-Power Handheld Devices