Switched-mode power supply quasi-resonant converter, switch control circuit controlling switching operations of switched-mode power supply quasi-resonant converter, and input signal processing circuit connected to control integrated circuit of switch control circuit

摘要

Disclosed is a Switched-Mode Power Supply (SMPS) quasi-resonant converter, a switch control circuit controlling switching operations of the SMPS quasi-resonant converter, and an input signal processing circuit connected to a control Integrated Circuit (IC) of the switch control circuit (220). The SMPS quasi-resonant converter includes a switch (S) and the switch control circuit (220). The switch control circuit includes a control integrated circuit (IC) (230) to control operation of the switch; a Zener diode (240) connected to an input terminal of the control IC; and a diode (250) connected in series with the Zener diode.