JPS6082986U

JPS6082986U - switching power supply circuit

Info

Publication number: JPS6082986U
Application number: JP17381383U
Authority: JP
Inventors: 早崎　喜代信
Original assignee: 日本電気株式会社
Priority date: 1983-11-10
Filing date: 1983-11-10
Publication date: 1985-06-08

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 drawings]

第１［ｆｆ１Ａおよび第１図Ｂは従来の小形スイッチン
グ電源回路の構成例を示す回路図、第２図は本考案の一
実施例を示す回路図、第３図は出力電流と出力電圧の関
係を示す図、第４図はトランジスタの導通しているパル
ス巾とコレクタ電流の関係を示す図である。１・・・・・・入力電源、２・・・・・・発振器、３・
・・・・・バッファ回路、４・・・・・・トランジスタ
、５・・・・・・電力変換トランス、６−１．６−２・
・・・・・整流ダイオード、７−１．７−２・・・平滑
コンデンサ、８−１．８−２・・・ドロッパ安定電源回
路、９−１．９−２・・・・・・コンデンサ、１０，１
１，１５，１６，１７．１８・・・・・・固定抵抗器、
１２・・・・・・半固定抵抗器、１３゜１４・・・・・
・発振用コンデンサ、１９，２０・・曲発振用トランジ
スタ、２１．２２・・・・・・バッファトランジスタ、
２３．２４．２５・・・・・・バイアス抵抗器、２６・
・・・・・スピードアップコンデンサ、２７．２８・・
・・・・負荷回路。Figure 1 [ff1A and Figure 1B are circuit diagrams showing a configuration example of a conventional small switching power supply circuit, Figure 2 is a circuit diagram showing an embodiment of the present invention, and Figure 3 is the relationship between output current and output voltage. FIG. 4 is a diagram showing the relationship between the conduction pulse width of a transistor and the collector current. 1... Input power supply, 2... Oscillator, 3.
... Buffer circuit, 4 ... Transistor, 5 ... Power conversion transformer, 6-1.6-2.
... Rectifier diode, 7-1.7-2 ... Smoothing capacitor, 8-1.8-2 ... Dropper stable power supply circuit, 9-1.9-2 ... Capacitor ,10,1
1, 15, 16, 17. 18...Fixed resistor,
12...Semi-fixed resistor, 13°14...
・Oscillation capacitor, 19,20...Transistor for curved oscillation, 21.22...Buffer transistor,
23.24.25...Bias resistor, 26.
...Speed-up capacitor, 27.28...
...Load circuit.

Claims

[Scope of utility model registration request]

an astable multivibrator, a buffer circuit connected to its output, a transistor whose base is connected to the output of this buffer circuit and whose collector is connected to the primary winding of a power conversion transformer, and to the secondary winding of the transformer. A switching power supply circuit including a connected capacitor input type rectifier circuit, characterized in that the resistor for setting the oscillation time of the astable multivibrator is composed of a semi-fixed resistor and a fixed resistor. .