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TMS320F28379D: Missing cycle implementation on ePWM

Ömer Yaman
Prodigy 10 points

Part Number: TMS320F28379D

Hello,

I'm driving a transformer via full-bridge system. There are 2 pairs of PWM outputs for mosfets and 2 of them work complementary. To achieve low power output i want to implement missing cycle outputs. The first solution to achieve this is to increase dead-time so much that two outputs are logic 0 on missing cycle period. Is there any better way to achieve missing cycle?

  • 0
    TI__Mastermind 26750 points

    Hi Omer,

    Through the use of the trip zone submodule you can cause your EPWM outputs to a certain state upon a trip condition. Trips can also be forced through software. In my opinion, this is probably the easiest way to implement what you would like to do. When you trigger the trip condition through software, you can cause the outputs to go low, then when you clear the trip, the outputs will resume their prior operation. Take a look at the TZFRC (Trip Zone Force) register and the TZA/TZB bits of the TZCTL (Trip Zone Control) register.

    Best Regards,

    Marlyn