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An overpower protection control method, switching power supply, and electronic equipment

An over-power protection, switching power supply technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of circuit output oscillation, switching power supply cannot provide stable output, etc., to prevent circuit oscillation, high efficiency, and stable operation Effect

Active Publication Date: 2022-02-08
SHENZHEN CITY SIGLENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of repeated mode switching, it often leads to circuit output oscillation, which makes the switching power supply unable to provide stable output conditions

Method used

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  • An overpower protection control method, switching power supply, and electronic equipment
  • An overpower protection control method, switching power supply, and electronic equipment
  • An overpower protection control method, switching power supply, and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Please refer to figure 1 , this embodiment discloses a switching power supply with over-power protection, the switching power supply mainly includes an input port 11, a main circuit 12, an output port 13, a detection circuit 14 and a control circuit 15, which will be described separately below.

[0031]The input port 11 can be a connection terminal for power input, and is mainly used to connect AC or DC power, for example, connect AC220V mains power to the input port 11, or connect DC110V direct current to the input port 11.

[0032] The main circuit 12 can not only convert the AC power input from the input port 11, but also convert the DC power output from the input port. For example, in one case, the main circuit 12 mainly rectifies the AC power input from the input port 11 to generate a constant-voltage direct current; in another case, the main circuit 12 stabilizes the DC power input from the input port 11 to generate Constant voltage direct current. It can be und...

Embodiment 2

[0039] This embodiment discloses an overpower protection control method for a switching power supply, and the applied switching power supply can refer to the figure 1 with figure 2 , and the overpower protection control method is mainly executed on the control circuit 15 of the switching power supply.

[0040] In this example, please refer to image 3 , the overpower protection control method mainly includes steps 310-330, which will be described respectively below.

[0041] Step 310, acquiring the instantaneous power output by the switching power supply. for example figure 1 , the control circuit 15 measures the instantaneous power value of the direct current on the output port 13 through the detection circuit 14, and can even measure the instantaneous current value and instantaneous voltage value of the direct current on the output port by means of the detection circuit 14.

[0042] For example, in a specific embodiment, when the control circuit 15 obtains the instantan...

Embodiment 3

[0066] In order to clearly understand the technical solution of this application, the overpower protection control method will be fully described through an embodiment. For details, please refer to figure 1 The switching power supply structure in and Figure 4 Method flow chart in .

[0067] Step 401 , the control circuit 15 in the switching power supply controls the main circuit 12 to generate direct current according to the voltage indicated by the output voltage parameter, and output direct current through the output port 13 .

[0068] Step 402 , the control circuit 15 obtains the instantaneous output of the output port 13 through the detection circuit 14 (such as the instantaneous voltage, instantaneous current and instantaneous power of the output direct current), and then makes a judgment based on these instantaneous output.

[0069] Step 403, judge whether the instantaneous power exceeds the first power (for example, the rated power of the switching power supply is 350...

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PUM

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Abstract

This application relates to an over-power protection control method, switching power supply, and electronic equipment, wherein the over-power protection control method includes: obtaining the instantaneous power output by the switching power supply, when the instantaneous power exceeds the preset first power, and the continuous over-power timer When the preset first time is exceeded, the switching power supply is controlled to enter the over-power protection mode; in the over-power protection mode, the execution voltage of the over-power protection is calculated, and the switching power supply is controlled to perform DC output according to the execution voltage. The technical solution strictly controls the output voltage of the switching power supply in the over-power protection mode, so that the switching power supply can be stably and continuously loaded under the condition of over-power, so as to meet the needs of stable operation of external electrical equipment.

Description

technical field [0001] The present application relates to the technical field of power supply protection, in particular to an overpower protection control method, switching power supply, and electronic equipment. Background technique [0002] A switching power supply is a high-frequency power conversion device. Its function is to convert a level of voltage into the voltage or current required by the user through different forms of architecture. The input of a switching power supply is usually AC (such as mains power) or DC power supply, and the output is usually a device that requires DC power, such as a personal computer, and the switching power supply performs voltage and current conversion between the two. [0003] The existing switching power supply is implemented based on hardware circuit detection. When the output power of the switching power supply exceeds the rated power of the circuit, two processing methods are commonly used at present: one is to directly turn off ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 谢炳涛曾显华李培松周云海
Owner SHENZHEN CITY SIGLENT TECH