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The Future of Analog IC Technology
MP2639A
2-Cell Li-Ion or Li-Polymer Switching Charger Compatible with 5V Input and Integrated,
Bidirectional Charge/Discharge with Cell Balance
DESCRIPTION
The MP2639A is a highly integrated, flexible, switch-mode, battery-charging management device for 2-cell series Li-ion and Li-polymer batteries used in a wide range of portable applications.
The MP2639A is able to charge a 2-cell battery from a 5V adapter or USB input. The MP2639A can work in three modes: charge mode, discharge mode, and sleep mode.
In 2-cell applications, the 5V input charges the 2-cell battery via the MP2639A operating in step-up mode. When the 5V input is absent, the 2-cell battery voltage is discharged to the 5V output via the MP2639A working in step-down mode.