Apparatus and method for protecting electric source

Abstract

This invention discloses a supply protection device including at least a protection circuit and its corresponding protection control circuit used in controlling said protection circuit to start or stop the supply protection function. This invention also discloses a supply protection method, which designs a protection circuit corresponding to the protected parameter, when the applied device works normally, said protection circuit protects the supply module, when the device carries out high speed test or high speed stress selection, the hardware or the software forbids the protection circuits to protect the supply module.

Description

technical field [0001] The invention relates to power protection technology, in particular to a power protection device and method. Background technique [0002] The rapid development of the communication industry has greatly promoted the development of communication power supply. High-frequency miniaturized switching power supply and its technology have become the mainstream of modern communication power supply systems. In the communication field, a rectifier is usually called a primary power supply, and a DC-DC (DC / DC) converter is called a secondary power supply. The function of the primary power supply is to transform the single-phase or three-phase AC grid into a DC power supply with a nominal value of 48V. Both the primary power supply and the secondary power supply have been modularized. The power module of communication equipment usually has protection circuits inside, such as over-current protection circuit (OCP), over-voltage protection circuit (OVP) and over-te...

AI Technical Summary

Problems solved by technology

If it is a non-open power supply, the shell of the power supply needs to be removed to deal with it, and this operation will cause certain damage to the power supply

[0012] In the process of product development and production, there are many tests that require the product to work outside the specified temperature, such as HALT (Highly Accelerated Life Test) and HASS (Highly Accelerated Stress Screening). At this time, the internal operating temperature of the power supply, output voltage or output The current may exceed the protection point for a short time, so that the power supply is in the protection state

Therefore, in order to meet the test requirements, it is necessary to turn off the relevant protection functions of the power supply. For a generally sealed power supply module, such an operation is inconvenient to implement and will cause certain damage to the power supply.

In addition, after the power supply is protected, if various protection functions cannot be disabled separately, it is not conducive to locating the specific protection that causes the power supply to have no output.

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