3A Synchronous Buck 3 Cells Li-ion Charger

DESCRIPTION

T

he

is a 3A 3 Cells Li-Ion battery charger. It utilizes a 500 KHz synchronous

buck converter topology to reduce power dissipation during charging. Low power

dissipation, an internal MOSFET allow a physically small charger that can be

embedded in a wide range of handheld applications. The HM5083 includes complete

charge termination circuitry, automatic recharge and a ±1% 12.6V float voltage.

Battery charge current, charge timeout and end-of-charge indication parameters are set

with external components. Additional features include shorted cell detection;

temperature qualified charging and overvoltage protection. The HM5083 is available in a

ESOP8 and DFN10 package

FEATURES



Input voltage range 4V~22V



Dynamic input current allocation for maximum charging rate



3A Maximum Charge Current



No External MOSFETs and Blocking Diode Required



Efficiency up to 95%



Constant-Current/Constant-Voltage Operation with Thermal Regulation to

Maximize Charge Rate Without Risk of Overheating



Optional Battery Temperature Monitoring Before and During Charge Automatic

Sleep Mode for Low-Power



Over Current Protection



Consumption Available in ESOP8 and DFN10



RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONS

Portable Media Players

Cellular and Smart mobile phone

PDA/DSC

Handheld Battery-Powered Devices

Handheld Computers

Charging Docks and Cradles

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HM5083