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TMS320F28377D: Symmetrical complementary PWM outputs with HR and deadband

VIKTOR SOUKAL
Prodigy 30 points
Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE

Can F2837xD devices produce symmetrical complementary PWM signals with high resolution and deadband? I've managed to configure micro to produce symmetrical complementary signals (e.g. for 3 x 2 signals for 3 phase motor control), but I can't achieve high resolution whilst maintaining symmetry. In this setup, the HR sub block needs to be configured to apply MEP to both edges, but that results in breaking symmetry when CMPAHR is not 0x80.

Am I missing something?

Thanks,

Viktor

  • 0
    TI__Mastermind 24095 points

    Hi,

    It is possible to achieve complimentary PWM output with High resolution deadband.
    Could you take a look at the example C:\ti\c2000\C2000Ware_1_00_06_00\device_support\f2837xd\examples\cpu1\hrpwm_deadband_sfo_v8 ?
    This example has both High resolution duty and deadband control in symmetric mode.

  • 0 in reply to Subrahmanya
    TI__Mastermind 24095 points
    Hi,
    I presume your issue is resolved with above example. If not, please provide more details or feel free to post a new thread if there is any other issue.