Current level change protection and control device for current supply

A power supply and protection control technology, applied in the direction of emergency protection circuit device, emergency protection circuit device, circuit device for limiting overcurrent/overvoltage, etc., can solve problems such as aggravation of load damage

Active Publication Date: 2009-08-26
CHROMA ELECTRONICS SHENZHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the constant current mode output, the power supply itself and the load provide and withstand the current of Iset respectively, and a larger Iset output may lead to aggravated damage to the already abnormal load
[0005] And the maximum internal loss of some power supplies (linear power supplies) is a short-circuit situation in the constant current mode. At this time, the power supply must bear all the power loss

Method used

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  • Current level change protection and control device for current supply
  • Current level change protection and control device for current supply
  • Current level change protection and control device for current supply

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Embodiment Construction

[0018] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0019] see figure 2 As shown, the preferred embodiment of the current level change protection control device of the power supply of the present invention is applied to the power supply, and the power supply can be a DC power supply or an AC power supply, so The DC power supply described above can be a linear power supply (LPS for short) or a switching power supply (SPS for short), and includes a voltage integration unit 1, a current integration unit 2, a pulse Wide modulator 3 and a control unit 4 . Since the current loop and the voltage loop of the power supply cannot be operated at the same time, no matter for any load, the power supply can only work in one of the two loops; in other words, the power supply It can only work in constant voltage mode (CV Mode) or constant current mode (CC Mode). The st...

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Abstract

The invention relates to a current level change protection and control device for a current supply, which is applied to a power supply and comprises a voltage integrating unit, a current integrating unit, a pulse width modulator and a control unit, wherein the control unit connects and seizes a signal of the voltage integrating unit and comprises a comparator, a digital signal processor and a digital-simulated converter. The digital signal processor adjusts the output digital signal to the digital-simulated converter according to a signal send by the output end of the comparator; and the digital-simulated converter converts a digital working signal thereof into simulated working current to the current integrating unit. As the magnitude of the working current determines the current level for changing the fixed current mode, the current level change protection and control device has the advantages of preventing overlarge load, changing the current level and protecting the load.

Description

technical field [0001] The present invention relates to a current level change protection control device for a power supply, in particular to a current level capable of changing the constant current mode, thereby preventing and protecting the load from excessive load. Background technique [0002] Electronic equipment (such as televisions, stereos, computers, air conditioners and light bulbs, etc.) must use power to operate, and power can be divided into AC and DC, so there must be AC ​​power supply and DC power supply (or rectifier) ​​to To supply the power required by electronic equipment, the DC power supply can be divided into two types: Linear Power Supply (LPS for short) and Switching Power Supply (SPS for short). Compared with the traditional linear power supply, the switching power supply has the disadvantages of larger output ripple / noise and more complex circuits, but it has small size, light weight, high power density / conversion efficiency, and input voltage range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32H02H9/02H02M7/5395
Inventor 王志贤刘利伟廖孝茵
Owner CHROMA ELECTRONICS SHENZHEN
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