JPH0226383U

JPH0226383U -

Info

Publication number: JPH0226383U
Application number: JP10402588U
Authority: JP
Priority date: 1988-08-08
Filing date: 1988-08-08
Publication date: 1990-02-21

Description

[Brief explanation of drawings]

第１図は本考案による多出力スイツチング・レ
ギユレータの一実施例の回路構成図、第２図は第
１図の要部動作波形図、第３図、第４図、第５図
はそれぞれ従来技術による多出力スイツチング・
レギユレータの各種回路構成図である。１，２……入力端子、３，４，５，６……出力
端子、７……トランス、８……外部コントロール
端子、９……第１の制御ＩＣ、１０……比較器、
１１……フオトカツプラ、１２……第２の制御Ｉ
Ｃ、２０……補助電源回路、２１……同期波形整
形回路、２２……ドライブトランス。 Fig. 1 is a circuit configuration diagram of an embodiment of a multi-output switching regulator according to the present invention, Fig. 2 is an operational waveform diagram of the main part of Fig. 1, and Figs. 3, 4, and 5 are related to the prior art. Multi-output switching by
FIG. 3 is a diagram showing various circuit configurations of the regulator. 1, 2...Input terminal, 3,4,5,6...Output terminal, 7...Transformer, 8...External control terminal, 9...First control IC, 10...Comparator,
11... Photo coupling, 12... Second control I
C, 20... Auxiliary power supply circuit, 21... Synchronous waveform shaping circuit, 22... Drive transformer.

Claims

[Scope of utility model registration request]

a primary side circuit having a switching element of the primary side circuit and a switching element control circuit of the primary side circuit that controls the switching element of the primary side circuit;
In a forward type multi-output switching regulator having two or more secondary side output circuits, voltage feedback is performed from one of the secondary side output circuits to the switching element control circuit of the primary side circuit via a transformer. Voltage control feedback circuit and one other 2
A secondary circuit switching element provided between the transformer winding and the rectifier diode of the secondary output circuit, a switching element control circuit of the secondary circuit that controls this secondary circuit switching element, and a switching element control circuit of the secondary circuit that controls this secondary circuit switching element. a drive transformer that supplies a control signal from the switching element control circuit of the secondary circuit to the switching element of the circuit; and a drive transformer that rectifies the output of the transformer winding to supply power to the switching element control circuit of the secondary circuit. A multi-output switching regulator comprising: an auxiliary power supply circuit; and a synchronous waveform shaping circuit that shapes the waveform of the output of the transformer winding and uses it as a synchronous signal for the switching element control circuit of the secondary circuit.