AC/DC detection circuit, power supply protection circuit, switching power supply and switching power supply protection method

A detection circuit, AC and DC technology, applied in the field of power protection circuit, switching power supply and its protection, AC and DC detection circuit, can solve the problems of complexity, high cost, high power supply cost and circuit reliability requirements

Active Publication Date: 2020-10-23
POWERLD ENTERPRISES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of implementation, the inventors found that there are at least the following problems in the traditional technology: the AC detection in household equipment and industrial equipment is either not available, or it is relatively complicated, or the cost is relatively high, and the power supply company is concerned about the power supply cost and The reliability of the circuit is high, and the traditional technology has the problem of the complexity and high cost of the AC and DC detection circuit inside the power supply

Method used

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  • AC/DC detection circuit, power supply protection circuit, switching power supply and switching power supply protection method
  • AC/DC detection circuit, power supply protection circuit, switching power supply and switching power supply protection method
  • AC/DC detection circuit, power supply protection circuit, switching power supply and switching power supply protection method

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application, and are not intended to limit the present application.

[0049] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.

[0050] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element, or connected to the other element through an intervening element. In addition, "connection" in the following embodiments should be understood as "electr...

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Abstract

The invention relates to an AC / DC detection circuit, a power supply protection circuit, a switching power supply and a switching power supply protection method. The AC / DC detection circuit comprises asampling circuit used for being connected between a power supply and a power supply main control chip. The sampling circuit comprises: a rectifying circuit, wherein the rectifying circuit is used forobtaining an input voltage, rectifying the input voltage and outputting a rectified signal; a reference voltage circuit, wherein the reference voltage circuit is powered by a power supply and outputsa reference voltage; and a comparison circuit, wherein the first input end of the comparison circuit is connected with the reference voltage circuit to obtain the reference voltage, the second inputend is connected with the rectifying circuit to obtain the rectified signal, and the output end of the comparison circuit is used for connecting a power supply main control chip. The main control chipof the power supply can be controlled to realize power supply dormancy or work, and simplicity, common devices and low cost are achieved.

Description

technical field [0001] The present application relates to the technical field of power supply protection, in particular to an AC / DC detection circuit, a power supply protection circuit, a switching power supply and a protection method thereof. Background technique [0002] Now the power industry's own function, adaptability, and cost requirements are increasing day by day, and the internal circuit of the power supply is simplified to realize the stability and reliability of the power supply. To achieve more functions with the least components, so as to slow down the excessive waste of non-renewable resources in the development of science and technology, so as not to pollute the living environment, the most direct and effective way in the industry is to simplify the circuit to achieve more functions. [0003] In the process of implementation, the inventors found that there are at least the following problems in the traditional technology: the AC detection in household equipme...

Claims

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Application Information

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IPC IPC(8): H02M7/06H02M1/32H02M1/10H02M3/155
CPCH02M7/06H02M1/32H02M1/10H02M3/155H02M1/0009
Inventor 张进力刘丽高旗
Owner POWERLD ENTERPRISES
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