Circuit topological structure of low-voltage input isolation type multi-circuit output switching power supply

A circuit topology and input isolation technology, which is applied in the direction of DC power input conversion to DC power output, AC power input conversion to DC power output, output power conversion device, etc., can solve the problem of low voltage input isolation multi-output switch Problems such as difficulty in power supply design, increasing product assembly density, and affecting product reliability have achieved the effects of reducing production and use costs, improving work efficiency, and improving reliability
CN106533212APending Publication Date: 2017-03-22NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
Publication Date
2017-03-22

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Abstract

The invention discloses a circuit topological structure of a low-voltage input isolation type multi-circuit output switching power supply. The circuit topological structure comprises a voltage boosting circuit, a power conversion circuit and a rectifying circuit, wherein the voltage boosting circuit is connected with the power conversion circuit; and the power conversion circuit is connected with the rectifying circuit. By virtue of the circuit topological structure, multi-circuit isolation voltage output in a low-voltage input condition is realized, and the product assembling density and the production cost are lowered.
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Description

technical field

[0001] The invention relates to a circuit topological structure, in particular to the circuit topological structure of a low-voltage input isolation type multi-channel output switching power supply. Background technique

[0002] Switching power supply and DC / DC converter as the secondary power supply of the system are widely used in military and civilian electronic systems such as aerospace, aviation, ships, weapons, electronics, railways, communications, medical electronics, and industrial automation equipment. As these devices become more and more miniaturized, higher requirements are placed on the weight, volume, and cost of DC / DC converters, and DC / DC power supplies with small volume and high cost performance are becoming more and more popular.

[0003] The working voltage of the PWM control chip used in the isolated DC / DC converter is mostly above 5V, and the driving voltage of the corresponding VMOS tube is also high. The isolated PWM control chip and c...

Claims

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