Power Electronics / Power Management


Single-cell battery charger

6 August 2008 Power Electronics / Power Management

The MP26057 from MPS is a linear, high-performance single-cell Li-Ion or Li-Polymer battery charger with on-chip input polarity reverse protection down to -16 V. By integrating high-voltage input protection into the charger IC, the MP26057 can tolerate an input surge up to 28 V.

The device features constant current (CC) and constant voltage (CV) charging modes with programmable charge currents (200 mA to 1 A), current blocking and trickle charge. Other features include a programmable battery full threshold, termination and auto-recharge.

The MP26057 provides charger status indication to drive red and green LEDs (tri-colour indication). For guaranteed safe operation, the device limits the die temperature to a preset value when the device is heated up due to limited PCB space. Other safety features are battery temperature monitoring, and programmable timer to prevent prolonged charging of a dead battery.

An evaluation board is also available.



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