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Switching power supply output filter capacitor monitoring device and method

A technology of output filtering and capacitance monitoring, which is applied in capacitance measurement, measuring device, power supply test, etc., can solve the problem of complex monitoring circuit, achieve the effect of simplifying the monitoring circuit and reducing the cost of monitoring

Active Publication Date: 2018-07-03
CHINA ELECTRONICS PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a switching power supply output filter capacitor device and method for the traditional technical solution to the problem of complex monitoring circuit for switching power supply output filter capacitor monitoring

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  • Switching power supply output filter capacitor monitoring device and method
  • Switching power supply output filter capacitor monitoring device and method
  • Switching power supply output filter capacitor monitoring device and method

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Embodiment Construction

[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0035] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time. The terms "mounted", "one end", "the other end" and similar expressions are used herein for the purpose of description only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of or...

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Abstract

The invention discloses a switching power supply output filter capacitor device and method. The switching power supply output filter capacitor device comprises a trigger circuit, a voltage measuring circuit and a processing module. An input end of the trigger circuit is connected to a control signal end of a switching power supply module to be tested, and an output end is connected to a signal input end of the voltage measuring circuit. A measuring input end of the voltage measuring circuit is connected to an output end of a filter capacitor of the switching power supply module to be tested, and a measuring output end is connected to the processing module. Therefore, upon receiving a first jump edge signal and a second jump edge signal, the trigger circuit generates a first trigger signaland a second trigger signal; the voltage measuring circuit can sample and measure the output voltage of the filter capacitor separately upon receiving the first trigger signal and the second trigger signal, to obtain a first output voltage signal and a second output voltage signal; and through the processing of the processing module, the capacity of the filter capacitor and ESR can be obtained. Thus, the monitoring circuit is dramatically simplified and the monitoring cost is reduced.

Description

technical field [0001] The invention relates to the technical field of switching power supply monitoring, in particular to a switching power supply output filter capacitor monitoring device and method. Background technique [0002] With the development of switching power supply technology, it has been widely used in household appliances, instrumentation, consumer electronics and other scenarios. Since the power supply module is the basis of the entire circuit, its reliability is directly related to the normal operation of the entire circuit. For the switching power supply module, the filter capacitor of its filter is the part with the highest failure probability in the whole module. More than 60% of the failures of switching power supply modules are caused by the failure of filter capacitors. After a long period of aging of the filter capacitor, the electrolyte will decrease, resulting in a decrease in the capacitance of the filter capacitor and an increase in the equivale...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/42G01R27/26G01R27/02
CPCG01R27/02G01R27/2605G01R31/42
Inventor 雷登云成立业王力纬侯波恩云飞黄云
Owner CHINA ELECTRONICS PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST
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