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ISO5852S: ISO5852S propagation delay problem.

Part Number: ISO5852S

Hi,

I have designed a gate driver for a 3 phase 5.4 kW front end converter. I am seeing a high propagation delay of 1us at the out of the gate driver.

Can anyone help me with what could be the cause of such high propagation delay.

I have attached a waveform for your reference. (Pink is PWM signal and Blue is gate drive output)

Please let me know if you need more information.

  • Shubham, 

    Load / capacitance on the output can slow prop delay, but i'm not sure if this is the case here. 

    Where are you probing the in and ouput signals. Probe them both near the pins? And what do the low-high prop delay look like?

    You can also try to swap the IC with a different one, if this prop delay is the same in both, let me know. 

    Best

    Dimitri