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TL4242 VIN and PWM tied together

Ed Walker
Prodigy 5 points
Other Parts Discussed in Thread: TL4242

Is it an acceptable use of this device to tie the PWM & Supply input pin (I) together to receive a PWM input signal (24V or 35 V; 200 Hz) for varying the output LED power.

What considerations should be thought of?

  • 0
    TI__Genius 14890 points

    Ed,

    We have taken data with the TL4242 EVM with I and PWM pulsing from 0V to 12V through 40V and duty cycles from 10% to 100% (200Hz) and see no issues at all.

    A summary of the data will be posted upon complete analysis.

    Considerations should be Thermal dissipation at the high duty cycle end along with power up / down timing at the low duty cycle end.

    Regards,

    Dick