AlienCircuits
Member level 5
"Series" resonant DC-DC converter
Hi,
Question first:
I can't find any examples of using a series loaded resonant circuit in a basic buck topology. I find many examples in my textbook and other references of using parallel loaded with the basic buck topology. So, now I wonder if the implication that I read that a normal switching converter (e.g. buck) can be converted to a resonant converter by replacing the hard switch with a soft switch (hard switch + resonant LC circuit) is not universally true. Can I use a series loaded resonant circuit in a basic buck topology?
Background info:
I started studying resonant converters. Bob Mammano suggests that series loading is better suited for high voltage, high output impedance applications rather than a parallel loading topology in his paper. Series loaded means the resonant circuit's L and C are in series with the load, so the C is a DC blocking cap.
I think he implies that a normal SMPS switch becomes a resonant switch by following the switch with either a parallel or series loaded resonant circuit, and so they can be "transplanted" into familiar SMPS topologies like the buck converter.
My confusion is that when I tried to find examples of series loaded converters, they all are used as either inverters or rectified and filtered AC waveforms.
- - - Updated - - -
Also, I should mention that I am talking about quasi resonant converters specifically.
Hi,
Question first:
I can't find any examples of using a series loaded resonant circuit in a basic buck topology. I find many examples in my textbook and other references of using parallel loaded with the basic buck topology. So, now I wonder if the implication that I read that a normal switching converter (e.g. buck) can be converted to a resonant converter by replacing the hard switch with a soft switch (hard switch + resonant LC circuit) is not universally true. Can I use a series loaded resonant circuit in a basic buck topology?
Background info:
I started studying resonant converters. Bob Mammano suggests that series loading is better suited for high voltage, high output impedance applications rather than a parallel loading topology in his paper. Series loaded means the resonant circuit's L and C are in series with the load, so the C is a DC blocking cap.
I think he implies that a normal SMPS switch becomes a resonant switch by following the switch with either a parallel or series loaded resonant circuit, and so they can be "transplanted" into familiar SMPS topologies like the buck converter.
My confusion is that when I tried to find examples of series loaded converters, they all are used as either inverters or rectified and filtered AC waveforms.
- - - Updated - - -
Also, I should mention that I am talking about quasi resonant converters specifically.
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