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TIDA-010062: some questions about this reference design

Yale Li 李耀先
Expert 4660 points
Part Number: TIDA-010062


Hi Team,

Here are some issues from the customer may need your help:

1. In function static inline void TTPLPFC_pwmDriver(), FED deadband periodical value(1000) will decrease 50 in every 100khz-interruption. Why is it reduced to DBFED (DBFED=500) and will not be reduced again? Active MOSFET duty cycle soft start to 50%?

2. How does the positive and negative half cycle synchronous MOSFET soft start?

3. Why       closed loop the duty cycle of the synchronous MOSFET?
    Why not closed loop the duty cycle of the active MOSFET?

Thanks & Regards

Yale Li