Hi,
How do I properly sync the switching frequency of the phase shift full bridge PWM every cycle or every 4 cycles?
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Hi,
How do I properly sync the switching frequency of the phase shift full bridge PWM every cycle or every 4 cycles?
I need more information. What are you synchronizing the frequency to? Some absolute value? Do you want to synchronize two devices with each other and have them be 180 degrees out of phase?
David, we have an app note that we did for synchronizing two UCD3138128s together. We actually used two signals sent by one UCD to the other. There is a slow signal to let the other UCD match frequencies, and a fast signal to permit 180 degrees out of phase.
Then we used the marvelous but complex UCD DPWM edge generation and intra-mux capability to move the timing differences that still occur away from the dead times and into the middle of an on-time where it doesn't have much effect. We have a very preliminary app note on how we did it.
I believe David has the app note, so I will close this thread.