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BQ25720: BQ25720 stop charging

Star Xu
Genius 9645 points
Part Number: BQ25720

Hi

The customer design with BQ25720. The battery stop charge during charging.

Charging is stopped probabilistically during the charging process, and the register value is read as follows at the moment of stopping charging.

It can be seen that the VINDPM mode is entered, and the input voltage is read back as 11.1V.

What is the reason for the bq25720 to cause no output?

How to avoid stop charging?

Please help check it.

Thanks

Star

  • 0
    TI__Mastermind 33525 points

    Hi Star,

    I noticed STAT_VDPM was triggered. It is most likely due to limited input supply. Please fix the VINDPM issue, and reset the STAT_VDPM bit. This would bring the charger back to work. 

    Regards,

    tiger

  • 0 in reply to Tiger Zhou
    TI__Genius 9645 points

    Hi Tiger

    Thanks for your help.

        1、 This is when charging normally，why STAT_VDPM was sitll triggered.status=2,TSHUT=0,Proc=0xB880,chg_curr=640,dsg_curr=0,vbus_volt=15168,vbat_volt=11136,vsys_volt=11200,ibus_curr=1850
    [0x12]:0x070E,[0x14]:0x0540,[0x15]:0x41A0,[0x3B]:0x09C4,[0x3C]:0x3C00,[0x3D]:0x1F40,[0x3E]:0x7100,[0x3F]:0x2800,
    [0x20]:0x8C00,[0x21]:0xB880,[0x22]:0x2800,[0x23]:0x9E00,[0x24]:0x0A00,[0x25]:0x2500,[0x26]:0xAFAE,[0xFE]:0x0040,
    [0xFF]:0x00E1,[0x30]:0x3300,[0x31]:0x00B7,[0x32]:0x0434,[0x33]:0x4A81,[0x34]:0x41A0,[0x35]:0xB0FF,[0x36]:0x0048,

     2、 Is it because the minimum input voltage setting is too high（11.2V） that the VINDPM  mode   is entered。Can it be set to 3.2V？

    Waiting for your reply.

    Thanks

    Star

  • 0 in reply to Star Xu
    TI__Mastermind 33525 points

    Hi Star,

    1. STAT_VDPM is a status bit, also needs to write zero to get it cleared.

    2. You may disable VINDPM by setting min input voltage to 3.2V. 

    Regards,

    Tiger