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TIDA-00961: ZVS Extension code about if(phase_OFF)

Suiyang Hu
Prodigy 195 points

Part Number: TIDA-00961

Hi, TI's engineer. I am currently studying the code of TIDA-00961. There is a judgment in the code about ZVS Extension in PWM ISR, if (zvs_adj_on && (!zvs_dont_adj) && (phase_OFF)). Isn't phase_OFF=1 when phase shedding? So does ZVS Extension only work when the one-phase bridge arm is working? Please tell me what is the function of "if(phase_OFF)" here. Thank you.