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TLC59116 gets hot, haven't measured the current yet to see the draw

Tyler Holeman
Prodigy 230 points
Other Parts Discussed in Thread: TLC59116


Hello, I got a customer interested in the TLC59116 and I'm playing with the EVM. From the temperature of the part when I'm driving the LEDs with the example profile, it gets hot. I'm assuming each output driver is sinking the current, and not just strobing the outputs to make it look like each output is driving at the same time. The functional block isn't clear on the outputs to understand if strobing is occuring. I haven't measured the current yet to see the draw.

  • 0
    TI__Mastermind 36110 points

    "Hot" is a relative term.  Depending on the operating conditions, you should expect the TLC59116 to get hot.  The TLC59116 IC power dissipation is a function of the current through each output and the voltage across the output.  If the output is operated with a the current flowing part of the time and not flowing part of the time (PWM dimming or blinking), you must consider the duty cycle to calculate the power dissipation.  All outputs typically turn on at the same time.