General Description

DA9155M offers a small solution that can be easily added on to existing main charger circuits and solves the heat dissipation problem created when the rapid charging feature is adopted. DA9155M is compatible to all rapid charging technologies using high voltage input.

DA9155M features a Buck converter capable of 2.5 A constant output current and regulates the output current with ±5 accuracy for single cell Li-Ion batteries. Current sensing is performed with a fully integrated circuit.

The peak efficiency of the Buck converter is 92 .

Key Features

■ Input voltage 4.3 V to 13.5 V

■ Input voltage monitoring

■ Buck converter with output current regulation

□ Output current 2.5 A

□ ±5 current regulation accuracy

□ Selectable switching frequency

■ Fault detection (VIN and VBAT monitoring)

■ Safety timer

■ Junction temperature monitoring

■ -40 °C to +85 °C temperature range

■ WLCSP, 0.4 mm pitch

Applications

■ Companion charger in smartphone and tablet

platforms

■ Companion charger for all single cell Li-Ion

battery powered devices