I have carefully read the UCD3138-026 and successful debuged the single phase PFC through the codes"UCD3138 Power Factor Correction Firmware". But when i debuged the interleave PFC refer to the only one that i can find the PDF "SLUA677-March 2013 ". I can't detect the DPWM1B and DPWM2B signal based on the Open loop test. Why?
Mr Sun,
Thank you so much! In my opinion, the "open loop test" means that disconnect the MOSFET gate signal that disconnect the drive resistance. In order to protecting the MOSFET if the DPWM imnormal. And i can detect the DPWM1B and DPWM2B signal based on the single phase PFC. What's more, i also can detect the DPWM1B and DPWM2B based on the interleave PFC without the CTsensing. as follows,
