一、General Description
The XR4059 is a 2.5A Li-ion battery charger. It utilizes a 600KHz synchronous buck converter topology to reduce power dissipation during charging. Low power dissipation and internal MOSFET allow a physically small charger that can be embedded in a wide range of handheld applications. The XR4059 includes complete charge termination circuitry, automatic recharge and ±1% 4.2V float voltage.
Additional features include shorted cell detection; temperature qualified charging and overvoltage protection. The XR4059 is available in a low profile SOT23-6 package.
二、Features
Input voltage range 4.5V~5.5V
Dynamic input current allocation for maximum charging rate
2.5A Maximum Charge Current
No External MOSFETs and Blocking Diode Required
Efficiency up to 90%
Constant-Current/Constant-Voltage Charger
Over Current Protection
Consumption Available in SOT23-6
RoHS Compliant and 100% Lead (Pb)-Free
三、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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