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Switch power supply

A technology of switching power supply and switching circuit, applied in the direction of electrical components, adjusting electric variables, output power conversion devices, etc., can solve the problem of low price and achieve the effect of easy driving

Inactive Publication Date: 2012-05-23
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-current, high-voltage and Easy-to-drive switch tube combination switching power supply, the switch tube combination is realized by a combination of high-current bipolar transistors and low-voltage MOS tubes

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Such as figure 1 , 2 Shown in the schematic structural diagram of the first preferred embodiment of the switching power supply of the present invention and related detailed circuit diagrams, the present invention constructs a switching power supply, which includes an input circuit 1, a switching circuit 2, and an energy conversion circuit connected in sequence 3 and an output circuit 4, the switching power supply also includes an output detection circuit 5 connected to the output circuit 4 and a feedback circuit 6 connected to the output detection circuit 5, wherein the switching circuit...

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Abstract

The invention relates to a switch power supply which comprises an input circuit, a switching circuit, an energy conversion circuit and an output circuit which are sequentially connected with one another; the switch power supply further comprises an output detection circuit connected with the output circuit, and a feedback circuit connected with the output detection circuit, wherein the switching circuit comprises a triode T2 and a metal oxide semiconductor (MOS) tube Q1; a collector of the triode T2 is connected with the input circuit; an emitting electrode of the triode T2 is connected with a drain electrode of the MOS tube Q1; a base electrode of the triode T2 is connected with a power supply; a source electrode of the MOS tube Q1 is in ground connection; and a grid electrode of the MOS tube Q1 is connected with the output of the feedback circuit. The switch power supply is capable of realizing a switching tube combination which is large in current, high in voltage and easy to drive by combining a large current dual-polarity transistor and the low-voltage MOS tube.

Description

technical field [0001] The invention relates to a switching power supply, more specifically, to a switching power supply with a combination of high current, high voltage and easy-to-drive switching tubes. Background technique [0002] The switching tube of the traditional switching power supply is a MOS tube, but because the current process technology of the MOS tube is difficult to achieve high voltage and high current, it is difficult to find a suitable MOS tube when the voltage exceeds 1KV or the current is hundreds of amperes. Model, even if a suitable model is found, the price cannot meet the requirements of commercial applications, so a combination switch method must be required to meet this application. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-current, high-voltage and A switching power supply with an easy-to-drive switching tube combination, which is realized by a combination of a high-curr...

Claims

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Application Information

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IPC IPC(8): H02M3/335
Inventor 周明杰王涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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