Other Parts Discussed in Thread: TIDM-02000
Hi,
I'm investigating the modes of operation of SR at PSFB CDR topology.
I saw that TI implemented different SR modes.
Mode 0 as no SR's are driven. SRs are only driven at diagonal overlap instants at Mode1. Mode2 is as driving SRs other than overlap. They depend on rated load value.
I understood that driving SRs at light load might be not efficient at overall.
1) Also, driving SRs in DCM - it can be work as boost topology when there is no energy in output inductors. It might be dangerous. Could you please confirm?
2) However, I couldn't understand why there is MODE 1. I think that MODE 2 is superior than MODE 1 and there should be no need to MODE1. Could you please explain in details? Why do we need MODE 1?
Thanks in advance.