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UCC27524: UCC27524D compare to UCC27324D

Bruce li
Genius 5580 points
Part Number: UCC27524
Other Parts Discussed in Thread: , UCC27424, UCC27324

Dear Ti engineers,

One of our OBD customer is evaluating UCC27524D and UCC27324D. They found that in their same circuits and same postion, when test with UCC27324D, everything is fine, when replace with  UCC27524D,

sometimes UCC27524D is broken. Some UCC27524D's VDD is short circuit with GND, some INA is short circuit with GND, and others  OUT is short circuit with GND.

After they checked datasheet, they didn't find obvious difference between these two devices. Do  you have any idea about this case? And what's your advice?Thanks a lot.

  • 0
    TI__Mastermind 31580 points
    Hi Bruce,

    I have asked one of our engineers to respond to your post.

    Regards

    Peter
  • 0 in reply to Peter Meaney
    Genius 5580 points
    Dear Peter,
    Got it. Thanks a lot.
  • 0
    TI__Mastermind 23105 points

    Hello Bruce,

    We regret the customer is having concerns with the UCC27524A in the application. In order to help provide advice to resolve the concern. We would need to see schematics of the circuit with the driver, Mosfet being driven, and the control input source.

    It is best to have scope plot waveforms of the VDD, driver input, driver output, and MOSFET VDS waveform to determine if there are concerns with excessive voltage spikes or ringing. And ideally the PC board layout of the driver and MOSFET section.

    The UCC27524 generally can be a replacement for the UCC27324 (or UCC27424), in the application. The UCC27524 will provide higher driver current and likely faster switching speeds than the UCC27324.