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Testing method and device for short-circuit and over-voltage protection of switch power supply output

An overvoltage protection and short circuit test technology, applied in the power supply field, can solve the problems of low test efficiency, troublesome test setup, low cost performance, etc., and achieve the effect of improving the low power test efficiency

Inactive Publication Date: 2009-09-02
CHINA GREATWALL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a test method and device for switching power supply output short circuit and overvoltage protection, aiming to solve the problems of low cost performance, troublesome test setup and low test efficiency of the switching power supply test system in the prior art

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  • Testing method and device for short-circuit and over-voltage protection of switch power supply output

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, 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.

[0033] In the embodiment of the present invention, the setting values ​​of the test items are read by the single-chip microcomputer, and continuous testing is automatically performed, and the test results can be automatically judged and defective items can be automatically displayed.

[0034] figure 1 It shows the structure of the test device for the output short circuit and overvoltage protection of the switching power supply provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The devi...

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Abstract

The invention is applicable to the field of power supply, and provides a testing method and a device for short-circuit and over-voltage protection of switch power supply output. The testing method comprises the following steps: a singlechip controls a first drive, a relay and a voltage source to work and executes a over-voltage testing; the singlechip controls a second drive and the relay to work and executes a short-circuit testing; whether the over-voltage testing and the short-circuit testing of the switch power supply to be tested are normally protected is judged; if the over-voltage testing and the short-circuit testing are normally protected, a pass-test signal is output. In the invention, testing results can be automatically judged and bad items can be displayed by reading setting values of testing items and automatically carrying out continuous testing through the singlechip.

Description

technical field [0001] The invention belongs to the field of power supplies, in particular to a testing method and device for output short circuit and overvoltage protection of a switching power supply. Background technique [0002] With the continuous development of computer technology, there are high requirements for the reliability and stability of switching power supplies. In the process of research and development, production and inspection, a large number of tests are required for switching power supplies. [0003] In the prior art, there are two testing methods for the overvoltage protection function test and the short circuit protection function test of the switching power supply: 1. Using the switching power supply automatic test system for testing. The advantages of using this system for testing are: accurate test results, controlled by software, automatic judgment of test results, and guaranteed quality; 2. Manually press the switches one by one to test. The adva...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40G01R31/02G01R19/165
Inventor 王利平陈科登尹高斌
Owner CHINA GREATWALL TECH GRP CO LTD