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TPS65185: TPS65185 Low Temp fail

Haroad
Intellectual 1600 points
Part Number: TPS65185

Hi,

     One of our customer met a issue of TPS65185. It can work well in room temp. But, when temp down to about 0dgree, they can not operate the Vcom register.

      After setting Vcom register(Vcom1, Vcom2), they will check INT1 PRGC bit, if the bit is 1(Vcom programming is complete), they will do next register setting. But, when 0dgree, the bit is always 0. 

      Can you help check and advice how to debug this issue?

     Attached is the schematic. pls also check.

     thanks

Haroad  

  • 0
    TI__Mastermind 20590 points
    Hi Harold,

    I have assigned this to the device expert. Due to the Easter Holiday's in the US, the response will be delayed. Please let us have a couple of days to get to this.

    Thanks & Best Regards,
    Scott
  • 0
    TI__Genius 10885 points
    Hi Haroad,

    0*C will cause a TMST_COLD interrupt by default. Section 8.3.11.2 of the datasheet describes how the temperature interrupt works.

    They might need to adjust register 0x0E to their new expected fault threshold, and clear the interrupt according to section 8.3.11.3.

    Best Regards,
    Rick S.