JPH0176183U

JPH0176183U -

Info

Publication number: JPH0176183U
Application number: JP1987172549U
Authority: JP
Priority date: 1987-11-11
Filing date: 1987-11-11
Publication date: 1989-05-23

Description

[Brief explanation of drawings]

第１図は本発明の一実施例の回路図、第２図は
該実施例の要部の電圧、電流の波形図、第３図は
従来のスイツチングレギユレータの一回路例を示
す回路図、第４図は該回路の要部の電圧、電流の
波形図、第５図は従来回路の他の例を示す回路図
である。１…電源、２…スイツチングトランジスタ、６
…ＰＷＭ制御回路、１０…負荷、２１…トランス
、２４…バイアス源スイツチングトランジスタ。 Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a voltage and current waveform diagram of the main parts of the embodiment, and Fig. 3 is a circuit diagram showing an example of a circuit of a conventional switching regulator. 4 are voltage and current waveform diagrams of essential parts of the circuit, and FIG. 5 is a circuit diagram showing another example of the conventional circuit. 1...Power supply, 2...Switching transistor, 6
...PWM control circuit, 10...load, 21...transformer, 24...bias source switching transistor.

Claims

[Scope of utility model registration request]

a power supply, a switching transistor connected to the power supply, and a control means for generating a control voltage for controlling on/off of the switching transistor;
A switching regulator comprising a first smoothing circuit connected to the output side of the switching transistor, a transformer whose primary side is a chiyork coil of the first smoothing circuit, and a secondary circuit of the transformer. a second smoothing circuit connected to the second smoothing circuit, a bias source switching transistor to which a bias voltage is supplied from the second smoothing circuit, and a current passing through the bias source switching transistor to the switching transistor. the bias source switching transistor is off when the switching transistor is on, and the bias source switching transistor is on when the switching transistor is off; A switching regulator characterized in that current is supplied to a switching transistor.