Dear Gents,
Looking at reference documents SLUA535 (section 6, Compensating the feedback loop) and SLUA702, I spotted notable differences in modelling of the active clamp circuit:
In SLUA535, it is stated that double pole at frequency (1-D)*fres (where fres is Lm with Cclamp resonance) occurs. On the contrary, in SLUA702 comprehensive analysis is done proving that there is a double zero at the aforementioned frequency and a double pole at slightly lower frequency. Can you please advise which one is true or why are the results different ?
In addition to that, I'd like to ask whether the same frequency response characteristics (poles, zeroes implied by the active clamp circuit) apply to voltage mode control (e.g. LM2025A) or is there any difference ?
Best regards,
Robert