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2.5 A companion charger IC for rapid charging applications


Adds 11W Charging Power

DA9155M offers a small solution that can be easily added on to existing main charger circuit designs and solves the heat dissipation problem created when the rapid charging feature is adopted in a system. It is compatible to all rapid charging technologies. DA9155M is added in parallel with the main battery charger to solve the thermal issue.

DA9155M features a Buck converter capable of 2.5 A constant output current with an accuracy of ±5%. Current sensing is performed with a fully integrated circuit. The peak efficiency of the Buck converter is 92%.


Input voltage 4.3 -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 to +85 °C temperature range


Heat dissipation problem solved

Compatible to any rapid charging technology

Compatible to all inductor based chargers

Dynamic current balancing between main and companion charger




Battery Packs


WLCSP-30 (0.4 mm pitch)

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Product Briefs and Summaries
Name Date Version
DA9155M Product Brief (598.8 KB)
Name Date Version
DA9155M Datasheet (762.73 KB)
Application notes
Name Date Version
DA9155M PCB Layout Guide (905.96 KB)
Software drivers
Name Date Version
DA9155M Linux kernel Driver (linux-stable/v3.18) (365.75 KB) (Registered users only) 07/01/2016 1v2
Software Resources
Name Date Version
DA9155 setup GUI AB.0.0.20 (59.85 MB) (Registered users only) 15/03/2016 AB
User guides and manuals
Name Date Version
DA9155M Evaluation Board Guide (2.32 MB)