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BQ24610: What happens when Input Supply Current limit is less than Set Charging Current?

Venugopal S
Intellectual 640 points
Part Number: BQ24610

Suppose my set charging current is 2A and corresponding to this let us say the required input current is 1.5A. If I reduce the current limit of my input source to less than 1.5 A, how will the charger behave ?? Does it continue charging at reduced current or does it stop charging altogether ?

I used a DC power supply as input and while the charging was ON, reduced the current limit of the input supply. When it went less than 1.5A, the charging was turning off almost completely. I was expecting it to operate at the availabe reduced input current but it was not happening.

  • 0
    TI__Intellectual 1980 points
    Hello,

    Normally, the charge current will be your current limit.
    What's your test condition and supply equipment? what's the VIN voltage(when current is higher than your power supply equipment, the supply voltage will decrease, so what's the voltage before charger off)? could you capture the waveform, includes IIN, VIN, VBAT and switch waveform, this is helpful for analysis?

    Regards
  • 0 in reply to Kerry Song
    TI__Intellectual 1980 points
    Hello,

    Please use ACSET pin to set IINDPM, limit the input current. Otherwise, your power supply equipment must decrease the supply voltage, and when lower than UVLO, the charger will be disabled.

    Regards