.I am hoping someone more experienced here could explain the workings of this circuit to me. The output voltage can go upto 94V and the current is a steady 133 mA
The circuit in the first post is not resonant or quasi resonant. Those control ICs work in a completely different manner.You are right SunnySkyguy thanks for the heads up and the app. note is good too, well what appears so elegant is really not so simple after all; the “devil” is always in the details isn’t it? The circuit behaves as a Quasi-Resonant tank with “inverted buck topology” using L2/L1 combination, I think?, what will the resonant frequency expression be in s.s operation any idea ? (in terms of L1,C4, and R3IIR3) . Also what do resistors R1//R2 and R4//R3 do exactly?
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