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2.5 A companion charger IC for rapid charging applications

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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


  • Smartphone
  • Tablet
  • Battery Packs
30 WLCSP, 0.4 mm pitch


Product Briefs and Summaries


Application notes

User guides and manuals

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