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Why does the power module perform overcurrent protection and how to achieve overcurrent protection

Source: Guangzhou Nengda Power Technology Co., Ltd. Time: 2019-11-06 18:13:45 Views:

What is overcurrent protection? What are the methods of overcurrent protection? Xiaobian came to explain to everyone today, most electronic products contain power modules in order to supply power to electronic products. But in addition to power supply, we also need to do a good job of maintaining performance, such as overvoltage protection, overcurrent protection and short circuit protection. As the power supply is inevitable in the course of operation due to other reasons such as overcurrent, overcurrent protection or short-circuit faults, in order to maintain the characteristics of the product, we also need to take good measures to protect it, so how should we deal with the problem of overcurrent Do it?


First, let's talk about several types of protection measures for overcurrent. There are three types, one is the rated current droop type, the second is the constant current type, and the third is the constant output power type.


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How are these three protective measures achieved?

Rated current droop type-hiccup type, self-healing. The basic principle is to check the power supply circuit to see if overcurrent occurs, and then feedback to the control loop to turn off the output. After a corresponding time, if the overcurrent is also checked, then feedback control is performed until the overcurrent disappears.


The constant current type is a commercial overpower design scheme. The commodity maintains a stable current. Because the current is greater than the full load, the output power capacity of the design scheme is greater than the standard.

How is constant power maintained? When overcurrent occurs, the power remains the same and the amount of current increases, which is protected by reducing the output operating voltage.


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The above is the content shared by Guangzhou Nengda Power Technology Co., Ltd. I hope the above content can help everyone. For more information, please visit our official website: http://yongle-sh.com