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

A detection circuit and switching power supply technology, applied in the direction of irreversible AC power input conversion to DC power output, DC power input conversion to DC power output, electrical components, etc., can solve high cost, complexity, power supply cost and circuit reliability Higher requirements and other issues, to achieve the effect of low cost and commonly used low-cost devices

Active Publication Date: 2022-06-21
POWERLD ENTERPRISES +1
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  • Abstract
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  • 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 protection method thereof
  • AC/DC detection circuit, power supply protection circuit, switching power supply and protection method thereof
  • AC/DC detection circuit, power supply protection circuit, switching power supply and protection method thereof

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[0048] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

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

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

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Abstract

The application relates to an AC / DC detection circuit, a power supply protection circuit, a switching power supply and a protection method thereof. Among them, the AC and DC detection circuit includes a sampling circuit used to connect between the power supply and the main control chip of the power supply; the sampling circuit includes: a rectification circuit; the rectification circuit is used to obtain the input voltage, and rectify the input voltage, and output the rectified signal; reference voltage circuit; the reference voltage circuit is powered by a power supply and outputs a reference voltage; a comparison circuit; the first input end of the comparison circuit is connected to the reference voltage circuit to obtain a reference voltage, and the second input end is connected to a rectification circuit to obtain a rectified signal; the output terminal of the comparison circuit is used to connect the main control chip of the power supply; based on the application, the main control chip of the power supply can be controlled to realize the sleep or work of the power supply, which is simple, commonly used and low in cost.

Description

technical field [0001] The present application relates to the technical field of power supply protection, and 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 functions, 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 number of components, thereby slowing 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 inventor found that there are at least the following problems in the traditional technology: AC detection in hous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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