ZCS switching power supply circuit of NE555

Published:2011/7/8 20:44:00 Author:chopper | Keyword: ZCS, switching, power supply | From:SeekIC

The picture shows the ZCS switching power supply circuit of NE555.This is the current resonance method(ZCS) switching power supply which is formed by adding LC series resonant circuit to step-down DC-DC converter.ZCS mode adopts fixed conduction time of resonant cycle-time to change frequency modulation.In the circuit, NE555 forms the common step-down DC-DC converter composed of voltage-controlled oscillators,switching power MOSFET (VF1),freewheeling diode YD3,smoothing inductor L2 and so on.Inductor L1, capacitor C2 constitute a resonant circuit.



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