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TLC5928: TLC5928 getting overheat

Dinesh Kumar60
Prodigy 80 points
Part Number: TLC5928

Hi Team,

     TLC5928 Ic getting heated in my circuit. Please find the attached screenshot for reference.

     Note: Blank pin is always grounded as per below circuit

     

    Please help me to resolve this issue.

    Thanks in advance

Regards,

Dinesh

  • 0
    TI__Genius 14295 points
    Hi, Dinesh,

    What's the forward voltage of your LEDs?

    Thanks.
    Regards,
    Kenneth
  • 0 in reply to Kenneth Du
    Prodigy 80 points

    Hi Kenneth,

         Thanks your your support. Please find below screenshot for the details

        

        Thanks in advance

    Regards,

    Dinesh

  • 0 in reply to Dinesh Kumar60
    TI__Genius 14295 points
    Hi, Dinesh,

    It's 25mA for your circuit for each channel.

    Vf should be less than 3.1V at 25mA for your LED.

    Taking 3V for estimation, the power dissipation of the driver is around P = (5-3)*25*16mW=800mW.

    So what's the package you are using?

    Tanking HTSSOP-24 for example, the temperature is 25 + 800/28.9 = 53C.

    You can also check about your package. If the temperature rise is too high please adjust your 5V Vled to lower voltage.

    Thanks.
    Regards,
    Kenneth
  • 0 in reply to Kenneth Du
    Prodigy 80 points
    Hi Kenneth,

    Thanks for your valuable input.
    We are using SSOP-24 package and the temperature is 25 + 800/14.5 = 80C.
    1. Is 80C is acceptable for this SSOP-24 package?
    2. Will the IC get malfunction at this temperature in any possible situation?

    Note: As per datasheet, temperature range is 150C for SSOP-24 package

    Kindly advice.

    Regards,
    Dinesh D