The MP26124 is a monolithic, DC/DC, step-down, switching charger for 4-series cell Li-ion battery packs. The MP26124 has an integrated high-side power MOSFET that can output a charge current up to 2A and also has peak-current-mode control for fast loop response and easy compensation. The MP26124 uses a sense resistor to control a programmable charge current and regulates the charge current and charge voltage accurately using two control loops. The MP26124 has multiple fault condition protections including cycle-by-cycle current limiting and thermal shutdown. Other safety features include battery temperature monitoring and protection, charge status indication, and a programmable timer to stop the charging cycle when the timer expires. The MP26124 requires a minimal number of readily available external components and is available in a QFN-16 (4mmx4mm) package.
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