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Overcurrent control circuit, overcurrent control method and power supply system using same

一种控制电路、电源系统的技术，应用在用于限制过电流/过电压的紧急保护电路装置、电路装置、紧急保护电路装置等方向，能够解决电源负载损坏、输出电压过冲等问题，达到消除过冲、避免损伤的效果

Active Publication Date: 2017-01-04
JOULWATT TECH ZHANGJIAGANG INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method to solve the problem that the output voltage will overshoot when the output short circuit is restored or the overcurrent is restored in the traditional solution, resulting in damage to the power supply or load

Method used

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  • Overcurrent control circuit, overcurrent control method and power supply system using same
  • Overcurrent control circuit, overcurrent control method and power supply system using same
  • Overcurrent control circuit, overcurrent control method and power supply system using same

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Embodiment Construction

[0034] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0035] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0036] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses an overcurrent control circuit, an overcurrent control method and a power supply system using the same. When the system normally operates, a fixed reference voltage is used; when output short circuit or overcurrent occurs, the reference voltage is pulled down; at the moment of output short circuit recovery or overcurrent recovery, the reference voltage rises slowly to a steady-state value; and an output voltage feedback signal rises slowly with the reference voltage. Output voltage overshoot can be effectively eliminated to protect the system from damage.

Description

technical field [0001] The invention relates to a power electronic technology, more specifically, to an overcurrent control circuit and an overcurrent control method applied in a switching power supply. Background technique [0002] As the power supply equipment of all electronic products, the power supply not only needs to meet the requirements of power supply products, but also has its own protection measures, such as overvoltage, overcurrent, overheating, etc. Once an electronic product fails, it will cause damage to the electronic product, or even cause a fire. Therefore, the protection function of the switching power supply must be perfect. Overcurrent protection is one of the most commonly used protections. [0003] In the existing technology, such as figure 1 As shown, in the switching power supply circuit, when the output load is short-circuited or the output is over-current, the system generates a short-circuit signal SHORT through the output short-circuit detecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32
CPCH02M1/32H02M1/325H02H3/087H02H9/02H02M1/0025H02M3/1566H02M3/156
Inventor 陈小鹏黄必亮任远程周逊伟
Owner JOULWATT TECH ZHANGJIAGANG INC LTD
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