1 Reply Latest reply on Oct 22, 2018 6:14 PM by xzng

    Capsense temperature related false triggers CY8CMBR3108

    rgostlin_1748666

      I have a small LED lighting board which has a CY8CMBR3108 as a toggle switch to control the light. The board operates will within the temperature limits of all components. However, when the light is activated by a touch, the board heats up relatively quickly due to the LED power etc.

       

      What seems to happen is that the raw count slowly climbs with temperature and the automatic calibration cannot keep up. Finally after about a minute or so, the capsense falsely senses a touch and turns the light off. I have included a screen shot of the raw count log to show what I mean.

       

      I have played around with all of the configuration options that I can find with no real luck. I have also tried adding parasitic capacitance and series resistance to the sensor in different combinations. Nothing has seemed to help.

       

      Is there anything I can do to resolve this issue?

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