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[FAQ] BQ25890: Why does ICHG reduce during input voltage DPM (Dynamic Power Management) or the input current DPM for the chargers BQ25890, BQ25890H, BQ25892, BQ25895, BQ25895M, BQ25896, BQ25898, BQ25898D, BQ24190, BQ24192, BQ24195, BQ24195L, BQ24196, BQ242

Part Number: BQ25890
  • When the input source is over-loaded, it is either from the current exceeding the IINDPM (Input Current Limit) or from the voltage dropping below VINDPM (Input Voltage Limit).
    • For the current to cause the input source to be overloaded: Either IINLIM (Input Current Limit set by the Register) or the external ILIM pin’s setting has to be reached.
    • For the voltage to cause the input source to be overloaded: the input voltage falls below the VINDPM threshold.
  • The device then reduces the charge current until the input current falls below the input current limit and the input voltage rises above the input voltage limit.
  • For more information about the operation of IINDPM or VINDPM operation, please refer to the short video: the Current and voltage dynamic power management of multi-cell charges