JPS5837792U

JPS5837792U - switching regulator

Info

Publication number: JPS5837792U
Application number: JP13080481U
Authority: JP
Inventors: 川口　千廣
Original assignee: 富士電気化学株式会社
Priority date: 1981-09-02
Filing date: 1981-09-02
Publication date: 1983-03-11

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来技術を示す回路図、第２図は本考案の一実
施例を示す回路図、第３図はその要部における出力波形
図である。FIG. 1 is a circuit diagram showing a conventional technique, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is an output waveform diagram of a main part thereof.

Claims

[Scope of utility model registration request]

A main switching element, a main transformer, a secondary rectification/smoothing circuit provided on the output side of the main transformer, and driving the main switching element via a drive transformer according to the output of the rectification/smoothing circuit. A switching regulator including a control circuit that controls a third winding provided in a main transformer and a second rectifier. an auxiliary power supply circuit for a control circuit consisting of a smoothing circuit; connecting in series a resistor, a capacitor, an output winding of a drive transformer that drives the main switching element, and a first switching transistor operated by the output of the drive transformer; , a first drive circuit in which a first diode is connected in parallel with the transistor in the opposite direction; a parallel circuit including a resistor and a coil provided in parallel with the first drive circuit; and a direct current on the primary side of the main transformer. a second drive circuit that supplies the output of a pulse train generation circuit operated by the input to the main switching element via a series circuit of a second switching transistor and a second diode; a third winding of the drive transformer; a third rectifier/smoothing circuit connected; a level shift circuit that supplies the output of the third rectifier/smoothing circuit to the first switching transistor; and a level shift circuit that uses the output of the third rectifier/smoothing circuit and a switch circuit that turns off the output of the pulse train generation circuit, the second drive circuit drives the main switching element at startup, and after startup, the voltage induced in the third winding of the drive transformer is used. A switching regulator in which a first switching transistor is turned on, a switch circuit is operated, a second switching transistor is turned off, and a main switching element is driven by a first drive circuit.