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Isolation power supply circuit, isolation power supply control method and isolation power supply

A technology for isolating power supplies and circuits, applied in circuit devices, control/regulation systems, emergency protection circuit devices, etc., can solve problems such as load damage, and achieve the effect of preventing damage and high reliability

Active Publication Date: 2021-08-20
HYNETEK SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above method still has the risk of causing load damage. For example, when the switch is abnormal and cannot be disconnected, the load will be damaged due to overvoltage

Method used

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  • Isolation power supply circuit, isolation power supply control method and isolation power supply
  • Isolation power supply circuit, isolation power supply control method and isolation power supply
  • Isolation power supply circuit, isolation power supply control method and isolation power supply

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Embodiment Construction

[0074] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0075] Please refer to figure 1 , figure 1 It is a structural schematic diagram of an isolated power supply in the prior art. Such as figure 1 As shown, in the isolated power supply, a transformer 5 is usually used to realize the isolation of the input power circuit 1 and the output power circuit 3 . The input power circuit 1 on the primary side of the tr...

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Abstract

The invention discloses an isolation power supply circuit, an isolation power supply control method and an isolation power supply. The isolation power supply circuit comprises a primary side module, an isolation module, a secondary side module, a signal transmission module, a switch module and a detection module. The switch module is used for switching a switch state according to a control signal output by the secondary side module so as to control the connection state between the secondary side module and a load; the detection module is used for outputting a first detection signal according to the voltage or current of the output end of the isolation power supply circuit, the secondary side module is used for generating a second detection signal according to the first detection signal and transmitting the second detection signal to the primary side module through the signal transmission module, and the primary side module is used for being connected with an external power supply; and the isolation module provides input power for the secondary side module so that the secondary side module provides a working voltage for the load according to the input power, and the primary side module is further used for determining whether the switch module is abnormal or not according to the second detection signal. Through the mode, the load can be effectively prevented from being damaged, and the reliability is high.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to an isolated power supply circuit, a control method for the isolated power supply, and the isolated power supply. Background technique [0002] In the power system, the power supply is divided into isolated power supply and non-isolated power supply. Among them, in some applications, such as AC input USB chargers, considering factors such as safety and noise, an isolated power supply must be used. [0003] For the isolated power supply in the USB charger, in order to better protect the load connected to it, it is usually necessary to set a switch at the output terminal of the isolated power supply for controlling the connection state between the output terminal of the isolated power supply and the load. The switch is usually controlled by the secondary side controller in the isolated power supply, and it can disconnect the switch in time when an abnormality o...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02H7/12H02H1/00H02H3/20
CPCH02M3/33523H02H7/1213H02H1/0007H02H3/202
Inventor 欧应阳谢仁践
Owner HYNETEK SEMICON CO LTD
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