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Power Management Series

LP28400

General Description
The LP28400A is a complete constant-current/ constant voltage switching charger for multi cell lithium-ion batteries. Boost+Linear charger work with a USB 2.0 compliant power IC assuring 2 cell LiIon battery charging. When the battery voltage is low, the charger works in linear operation mode. Along with the charging the battery voltage is higher the charger will transfer to Boost operation mode smoothly.
When the battery voltage <6V, switch to wake-up current charging.
Other features include charge current monitor, under voltage lockout, automatic recharge and a status pin to indicate charge termination.
    Features
    ?Adapter Adaptive
    ?Input voltage range 3V~12V
    ?Integrated low side power mosfet
    ?Simple structure and perfect transition between Linear and Boost operation
    ?Programmable charge current and CV voltage
    ?Dynamic input current allocation for maximum charging rate
    ?Automatically switches to wake-up current when charging over-discharged batteries
    ?Over Current Protection
    ?Over Temperature Protection
    ?Consumption Available in ESOP8 & QFN16(3mm*3mm) Package
    ?RoHS Compliant and 100% Lead (Pb)-Free
    ?Programmable Charge Mode for 2cells,3cells or 4cells charging (QFN-16 package only)
    Please submit your basic information, we will contact you as soon as possible!

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