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TMS320F280049C: Question about tida00961

Part Number: TMS320F280049C

Dear team:

My customer want to know:

1. How does this reference design solve the problem of zero-crossing distortion? Is it through the introduction of input feedforward, or through the vin_scaler in the code?

2. He wants to refer to the design of tida00961 and design it for 400hz, 115V input. What difficulties will he encounter? Is there a problem with sampling? Should the control algorithm be applicable?

Best regards