Current-limiting switch circuit and switching power supply device

A current-limiting switch and circuit technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as waste of electric energy, output voltage of no-load branch exceeds the specification, and affects the life of the voltage conversion device, etc., to achieve compensation for voltage drop, The effect of increasing the charging rate

Active Publication Date: 2019-02-12
SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

If voltage compensation is performed for a load branch, the output voltage of other no-load branches will also rise accordingly, causing the output voltage of the no

Method used

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  • Current-limiting switch circuit and switching power supply device
  • Current-limiting switch circuit and switching power supply device
  • Current-limiting switch circuit and switching power supply device

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Embodiment Construction

[0027] In order to make the above objects, features and beneficial effects of the present invention more obvious and understandable, the prior art and specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] figure 1 It is a structural schematic diagram of a current limiting switch circuit in the prior art.

[0029] Please refer to figure 1 , the current-limiting switch circuit has an input terminal IN and a plurality of output terminals OUT1, OUT2, ... OUTn, the input terminal IN is connected to the output terminal of the voltage conversion device 1, and the voltage convers...

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Abstract

The invention relates to a current-limiting switch circuit and a switching power supply device. The current-limiting switch circuit comprises a voltage control module, a switch module, and a compensation module, wherein the first input end of the voltage control module receives an associated voltage; the second input end of the voltage control module receives a reference voltage; the voltage control module generates a charging control signal according to the associated voltage and the reference voltage; the charging control signal is output through the output end of the voltage control module;the input end of the switch module receives input current of the input voltage end, and determines whether to charge the output voltage end or not according to the charging control signal; the compensation module is adapted to generate a compensation current according to the input current of the input voltage end; the compensation current is used to provide compensation to the output voltage end.The technical scheme can effectively compensate voltage drop caused by line loss, cable impedance, contact impedance and the like.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a current-limiting switch circuit and a switching power supply device. Background technique [0002] With the rapid development of science and technology, the functions of electronic equipment are becoming more and more powerful, and higher requirements are put forward for the power supply used. Usually, the power supply voltage of the power supply cannot fully match the voltage required for the normal operation of electronic equipment, so it is necessary to use a voltage conversion device (such as: switching power supply, voltage stabilization circuit, etc.) to convert the power supply voltage and then provide it to the Electronic equipment. [0003] In order to be able to charge multiple electronic devices at the same time, in the prior art, multiple charging branches are usually connected externally to the output terminal of the voltage conversion device. In speci...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 潘新波杨申华
Owner SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
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