JPS62195381U

JPS62195381U -

Info

Publication number: JPS62195381U
Application number: JP8302186U
Authority: JP
Priority date: 1986-05-30
Filing date: 1986-05-30
Publication date: 1987-12-11
Also published as: JPH0242078Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係わるスイツチング
レギユレータを示す回路図、第２図は従来のスイ
ツチングレギユレータを示す回路図である。１……電源、２……トランス、３……１次巻線
、４……スイツチングトランジスタ、５……２次
巻線、８……整流回路、９……３次巻線、１９…
…第１のダイオード、２０……第１のコンデンサ
、２１……第２のダイオード、２２……オン制御
用トランジスタ、２４……第２のコンデンサ。 FIG. 1 is a circuit diagram showing a switching regulator according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional switching regulator. DESCRIPTION OF SYMBOLS 1... Power supply, 2... Transformer, 3... Primary winding, 4... Switching transistor, 5... Secondary winding, 8... Rectifier circuit, 9... Tertiary winding, 19...
...first diode, 20...first capacitor, 21...second diode, 22...on control transistor, 24...second capacitor.

Claims

[Claims for Utility Model Registration] A series circuit of a transformer primary winding 3 connected to a DC power supply 1 and a switching transistor 4, a secondary winding 5 electromagnetically coupled to the primary winding 3, A rectifier circuit 8 is connected to the secondary winding 5 and includes a diode 6 that is turned on when the switching transistor 4 is turned off, and is electromagnetically coupled to the primary winding 3 and the secondary winding 5 and In the DC converter comprising a secondary winding 9 connected between the base and emitter of the switching transistor 4 and a constant voltage control circuit connected to the base of the switching transistor 4, the above 3. A first capacitor 20 connected between one end of the secondary winding 9 and the base of the switching transistor 4 is turned on by a voltage induced in the tertiary winding 9 when the switching transistor 4 is turned off. a diode 1 connected between one end of the tertiary winding 9 and one end of the first capacitor 20 with polarity;
9; a circuit for charging the first capacitor 20 with a voltage generated in the transformer when the switching transistor 4 is turned off; an emitter thereof is connected to one end of the first capacitor 20, and a collector thereof is connected to the switch an on-control transistor connected to the emitter of the switching transistor 4, whose base is connected to one end of the tertiary winding 9 via a resistor 23, and has a polarity that turns on when the switching transistor 4 is on; 22; and a second capacitor 24 connected in parallel to the resistor 23.