JPS62104583U

JPS62104583U -

Info

Publication number: JPS62104583U
Application number: JP19622385U
Authority: JP
Priority date: 1985-12-20
Filing date: 1985-12-20
Publication date: 1987-07-03

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す回路図、第２
図は従来の回路図、第３図は従来の一部回路図で
ある。３……トランジスタ、４……高周波トランス、
５，８……整流回路、７，１０……負荷、９……
レギユレータ、１１……誤差増幅器、１２……パ
ルス幅制御回路、１３……チヨツパ回路、１４…
…トランジスタ、１５……コンパレータ。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a conventional circuit diagram, and FIG. 3 is a partial conventional circuit diagram. 3...transistor, 4...high frequency transformer,
5, 8... Rectifier circuit, 7, 10... Load, 9...
Regulator, 11...Error amplifier, 12...Pulse width control circuit, 13...Chopper circuit, 14...
...Transistor, 15...Comparator.

Claims

[Scope of utility model registration request]

The main switching element switches the direct current to a high frequency and inputs it to a high frequency transformer.The outputs of the plurality of secondary windings of this transformer are rectified and smoothed by a rectifier circuit respectively to obtain a plurality of DC power supplies. In a multi-switching power supply in which the on/off ratio of the main switching element is controlled by voltage detection of one main DC power supply, and the other secondary DC power supplies are stabilized by respective regulators, the secondary DC power supplies are connected to the high frequency transformer. A switching element is provided in series between the secondary winding of the rectifying circuit and the rectifying circuit, and the on/off ratio of the switching element is controlled according to the output voltage of the rectifying circuit or the on/off ratio of the main switching element. A multi-switching power supply featuring a circuit.