JPS59119789U

JPS59119789U - switching regulator

Info

Publication number: JPS59119789U
Application number: JP1213383U
Authority: JP
Inventors: 茂中村
Original assignee: Sanken Electric Co Ltd
Current assignee: Sanken Electric Co Ltd
Priority date: 1983-01-31
Filing date: 1983-01-31
Publication date: 1984-08-13
Also published as: JPS642543Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のスイッチングレギュレータを示す回路図
、第２図は第１図の制御回路部分の等価回路図、第３図
は本考案の実施例に係わるスイッチングレギュレータを
示す回路図、第４図は第３図の制御回路部分の等価回路
図、第５図は駆動回路の変形例を示す回路図である。１・・・交流電源、２・・・主電源整流平滑回路、５・
・・スイッチングトランジスタ、６・・・出カドランス
、□　７・・・１次巻線、８・・・２次巻線、９・・・
３次巻線、１２・・・整流平滑回路、１３・・・第１の
逆流阻止用タイオード、１５・・・補助整流平滑回路、
１６・・・直流安定化電源回路、２２・・・制御パルス
形成回路、２８・・・第２の逆流阻止用ダイオード、３
１・・・駆動回路、３４・・・電流制限抵抗、３５・・
・第３の逆流阻止用ダイオード。Fig. 1 is a circuit diagram showing a conventional switching regulator, Fig. 2 is an equivalent circuit diagram of the control circuit portion of Fig. 1, Fig. 3 is a circuit diagram showing a switching regulator according to an embodiment of the present invention, and Fig. 4 is an equivalent circuit diagram of the control circuit portion of FIG. 3, and FIG. 5 is a circuit diagram showing a modification of the drive circuit. 1... AC power supply, 2... Main power supply rectification and smoothing circuit, 5.
... Switching transistor, 6... Output transformer, □ 7... Primary winding, 8... Secondary winding, 9...
Tertiary winding, 12... Rectifier and smoothing circuit, 13... First backflow blocking diode, 15... Auxiliary rectifier and smoothing circuit,
16... DC stabilizing power supply circuit, 22... Control pulse forming circuit, 28... Second reverse current blocking diode, 3
1... Drive circuit, 34... Current limiting resistor, 35...
- Third backflow blocking diode.

Claims

[Claims for Utility Model Registration] A main power rectifying and smoothing circuit 2 connected to an AC power source 1, a switching transistor 5 for intermittent output voltage of the main power rectifying and smoothing circuit 2, and a series connection to the switching transistor 5. an output rectifying and smoothing circuit 12 connected to the secondary winding 8 of the output transformer 6; and a tertiary winding for auxiliary power provided in the output transformer 6. 9
and an auxiliary rectifying and smoothing circuit 15 including a first backflow blocking diode 13 connected to the tertiary winding 9, and a stabilizing power source for obtaining a constant DC voltage connected to the main power rectifying and smoothing circuit 2. circuit 16, and the stabilized power supply circuit 16 so that the stabilized power supply circuit 16 can operate as a power source.
a control pulse forming circuit 22 connected to the auxiliary rectifying and smoothing circuit 15 via a second backflow blocking diode 28; A drive circuit 31 configured to drive the switching transistor 5 in response to a control pulse generated from the circuit 22 , and between the second backflow blocking diode 28 and the auxiliary rectifying and smoothing circuit 15 . At startup when the auxiliary rectifying and smoothing circuit 15 is connected and no voltage is obtained from the auxiliary rectifying and smoothing circuit 15, the driving circuit 31 is energized to be operable while the current supplied from the stabilized power supply circuit 16 to the driving circuit 31 is significantly limited. the control pulse forming circuit 2 with the current limiting resistor 34 set to a resistance value as such, and the auxiliary rectifying and smoothing circuit 15
The resistor 34 has a directionality capable of energizing the resistor 34.
a third reverse current blocking diode 35 connected in parallel to the switching regulator;