T
treez
Guest
yes...best to see inductor waveform...but many would guess it was in ccm, as there are no oscillations just before the vds goes down.
Its difficult to advise you without knowing where you already are.
Do you know Lenz's Law, V = Ldi/dt ?
Do you know Fardays law V = N(d(phi)/dt ?
What about kirchoffs laws?
Also Vp/Vs = Np/Ns for transformers ?
What happens if you suddenly apply a constant voltage across an ideal inductor?
Do you know "ampere turns balance"...eg Np.Ip = Ns.Is in transformers?
What happens if an inductive current is flowing, and you suddenly open a switch in the path of this inductive current? (and there is no other path for the inductive current to divert into)
These are the very basics of flyback design.
Please explain...in your blue vds waveform of #19 post, can you explain why there is that spike as the vds rises...this is a key point of flybacks, which you will need to know.
"demystfying switching power supplies" by raymond mack jr is a good simple book for flyback (and other) design.
It gooes through a flyback design
Its difficult to advise you without knowing where you already are.
Do you know Lenz's Law, V = Ldi/dt ?
Do you know Fardays law V = N(d(phi)/dt ?
What about kirchoffs laws?
Also Vp/Vs = Np/Ns for transformers ?
What happens if you suddenly apply a constant voltage across an ideal inductor?
Do you know "ampere turns balance"...eg Np.Ip = Ns.Is in transformers?
What happens if an inductive current is flowing, and you suddenly open a switch in the path of this inductive current? (and there is no other path for the inductive current to divert into)
These are the very basics of flyback design.
--- Updated ---
Please explain...in your blue vds waveform of #19 post, can you explain why there is that spike as the vds rises...this is a key point of flybacks, which you will need to know.
--- Updated ---
"demystfying switching power supplies" by raymond mack jr is a good simple book for flyback (and other) design.
It gooes through a flyback design
Last edited by a moderator: