JPS6099890U

JPS6099890U - switching power supply

Info

Publication number: JPS6099890U
Application number: JP19324983U
Authority: JP
Inventors: 克彦清水
Original assignee: ティーディーケイ株式会社
Priority date: 1983-12-14
Filing date: 1983-12-14
Publication date: 1985-07-08

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図は従来の自励式スイッチング電源の電気回路接続
図、第２図は本考案に係る自励式スイッチング電源の電
気回路接続図、第３図は各部の波形図である。５・・・・・・スイッチング素子、６・・・・・・変圧
器、６１．６２，６３．６４・・・・・・巻線、１４・
・・・・・制御回路、１５・・・・・・パルストランス
、１６・・・・・・補助電源、１４５−−−−−−　ト
ランジスタ、１４０・・・・・・コンデンサ。FIG. 1 is an electric circuit connection diagram of a conventional self-excited switching power supply, FIG. 2 is an electric circuit connection diagram of a self-excited switching power supply according to the present invention, and FIG. 3 is a waveform diagram of each part. 5... Switching element, 6... Transformer, 61.62, 63.64... Winding wire, 14.
... Control circuit, 15 ... Pulse transformer, 16 ... Auxiliary power supply, 145 --- Transistor, 140 ... Capacitor.

Claims

[Scope of utility model registration request]

(1) A transformer, a switching element that switches DC input applied through the winding of the transformer, a circuit that uses the winding of the transformer to perform self-excited oscillation, and a DC input that is taken out through the transformer. a circuit for rectifying and smoothing a switching output to obtain a DC output; a control circuit for generating a control signal for controlling an off operation of the switching element according to the DC output; and transmitting the control signal of the control circuit to the switching element side. In the switching power supply including a pulse transformer, the control circuit has a circuit configuration that continues to output a control signal in pulse form to turn off the switching element until the DC output voltage drops below a certain level. switching power supply.

(2) The scope of the utility model registration claim, characterized in that a control signal for controlling the switching element to be turned off is continuously outputted in a pulse form using the oscillation component of the voltage generated in the winding of the transformer at the period of the oscillation. The switching power supply according to paragraph 1.

(3) It has an auxiliary power source that includes the windings of the transformer and generates an operating power source for the control circuit and a driving power source for the pulse transformer, and is supplied after the rectifier circuit that constitutes the driving power source for the pulse transformer. The switching power supply according to claim 1, wherein the driving signal is supplied from a winding of the transformer constituting the auxiliary power supply.

(4) A capacitor is connected between the winding of the transformer constituting the auxiliary power supply and the base of the transistor connected in series to the pulse transformer, and the capacitor supplies a pulse-like drive signal to the transistor. A switching power supply according to claim 3 of the utility model registration claim, characterized in that: