A DC power supply circuit

A technology of power supply circuit and DC power supply, which is applied to electrical components, irreversible AC power input into DC power output, output power conversion devices, etc. Component temperature rise and other problems, to achieve the effect of suppressing electromagnetic interference, reducing current flow time, and fast response

Active Publication Date: 2019-08-30
LEXTAR ELECTRONICS(CHUZHOU) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Switching power supply is different from linear power supply in its high-frequency and high-speed operating characteristics. When the internal switching elements operate, strong output voltage and output current changes will be generated, so many high-frequency noises will be generated, which will further affect peripheral electronic equipment. Electromagnetic interference; in the prior art, the methods used by the industry to suppress these noises, such as trying to adjust the switching speed, will lengthen the time for the current to pass through the components, which will cause the temperature of the components to rise

Method used

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  • A DC power supply circuit
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Embodiment Construction

[0023] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0024] Certain terms are used in the description and claims to refer to particular elements. Those of ordinary skill in the art will appreciate that manufacturers may refer to the same element by different terms. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to".

[0025] refer to figure 2 As shown, it discloses a schematic structural diagram of a DC power supply circuit 001 according to an embodiment of the present invention, image 3 It shows the signal sequence diagram of the load change when ...

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Abstract

The invention provides a direct current source power supply circuit which is used to provide power to a load. The direct current source power supply circuit comprises a direct current power supply module, a filtering module, a sensing module and a first driving unit. The direct current power supply module is provided with a power supply switch control unit. The filtering module cooperates with the power supply switch control unit to control the power supply cycle of the direct current power supply module. The sensing module is coupled between the direct current power supply module and the load to obtain the change rate of the current across the direct current power supply module and outputs a first detection signal. The first driving unit is coupled with the sensing module and the filtering module. The first driving unit converts the first detection signal into a first driving signal to control the filtering module. The circuit of the invention is capable of responding to the change in the load rapidly and at the same time, accommodates the suppression of the working speed and the electromagnetic interference.

Description

technical field [0001] The invention relates to the field of DC power supply circuits, in particular to a power supply circuit capable of controlling the DC power supply cycle. Background technique [0002] At present, more and more electronic products are powered by switching power supply, which depends on the good characteristics of switching power supply itself. , so it has the advantages of small size, light weight, and high conversion efficiency. see figure 1 As shown, it is a schematic diagram of a DC switching power supply circuit in the prior art. The DC switching power supply circuit includes a DC power supply module 1a, a feedback unit 2a and a power factor controller 3a. The power switching control unit 11a is coupled between the transformer T1 and the rectifier diode 12a. , the voltage input signal Vin is coupled to the transformer T1, and then filtered by the rectifier diode 12a and capacitor C to finally obtain a constant value voltage output signal Vout, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/44H02M7/06
Inventor 简立翔姚宏民
Owner LEXTAR ELECTRONICS(CHUZHOU) CORP
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