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UCC27322-Q1: Propagation delay UCC27322 vs. UCC27524A1

Egon Hirsch
Expert 3370 points
Part Number: UCC27322-Q1
Other Parts Discussed in Thread: UCC27322, UCC27524

Hallo all

I have a question about propagation delay. I find it difficult to estimate the propagation delay of this device.

When I compare UCC27322 with UCC27524A1, the propagation delays are defined differently.


The UCC27322 is measured over the entire temperature range and the start and end points are also defined as 20% - 80%.

The UCC27524 is measured at room temperature, and the start and end points are also defined differently.


At first glance, the UCC27524 looks much, much better. How can the two drivers be assessed in relation to each other and under the same conditions?


We want to operate a MOSFET between 70-150kHz, so the delay time variance should be as low as possible so that we can compensate for it.

We want to resolve the PWM signal to 1-2%.

Best regards

Olaf

  • +1
    TI__Expert 4070 points

    Hallo Olaf,

    Thanks for reaching out!

    For the UCC27322, the temperature range is given as you have said.  You can largely extrapolate the lower prop delay times with extreme cold, and the higher prop delay times with the extreme hot temp.

    For the UCC27524, the propagation delay vs temperature is given as a graph in Figure 15 (please see below):

    I hope this answered your question!  If so, please confirm by pressing the green button; otherwise, feel free to follow up.

    Thanks,

    Aaron Grgurich