An overcurrent protection device and board

Abstract

The invention relates to an overcurrent protection device, wherein the device comprises: a main power supply configured to supply power to a main power supply load; an electronic fuse connected in series between the main power supply and the main power supply load, and configured In order to collect the current value of the main power supply load and perform overcurrent protection based on the current value and the protection threshold; the control chip is connected to the electronic fuse in communication, and is configured to control the electronic fuse based on the current value obtained from the electronic fuse and the warning threshold. Overcurrent warning, and the control chip is configured to calculate the protection threshold and warning threshold based on self-learning. The device of the invention can implement a more effective and safer board card overcurrent warning and protection mechanism to protect the board card and equipment equipped with the board card, and ensure reliable and safe operation of the board card and equipment.

Description

technical field [0001] The invention relates to the technical field of servers. The invention further relates to an overcurrent protection device and a board. Background technique [0002] At present, the vast majority of electronic equipment has a designed rated current. If the operating current exceeds the rated current, the equipment will burn out. Therefore, current protection modules are usually installed in the equipment. These current protection modules are circuits that realize overcurrent and overload protection functions, such as self-recovery fuses. When the current exceeds the set current, the equipment is automatically powered off. thus protecting the equipment. [0003] Among them, the server is equipped with a large number of various boards. The overcurrent protection of these boards is particularly important to protect the server, especially some special function boards, such as the accelerator card of the server. Acceleration card is a PCIe (peripheral co...

AI Technical Summary

Problems solved by technology

[0008] 2) It is impossible to identify and predict the existing latent faults of the board, the circuit is faulty or the circuit is working in an abnormal state. In some cases, although the current increases abnormally, it has not yet reached the overload current, and these faults cannot trigger protection;

[0009] 3) Ms-level action delay, slow protection response, and poor protection effect. The fuse protection principle is that when the overload current passes through, the resistance of the body is increased by heating, so as to reduce the current flowing through, and then realize over-current protection, but in actual operation It often happens that the follow-up circuit has burned out in many places, and the fuse has not had time to complete the protection action;

[0010] 4) The adaptability between the fuse and the board is poor, and the operating current parameters of the fuse are fixed. When selecting a model, usually choose a model that is closest to the design of the board. However, due to the limited type of fuse, the selected fuse current The parameters are close to the target value, but there are still not small deviations;

[0011] 5) Cannot monitor the power supply operating status and record fault information, cannot monitor unreasonable current demand, cannot effectively record the real situation of current fluctuations, and cannot meet the real-time monitoring needs of the system

[0012] During the working process, the current and voltage values ​​of the current system cannot be monitored in real time, historical operating data cannot be saved, and potential overcurrent hidden dangers cannot be predicted based on the current power consumption, especially when the main circuit current of the accelerator card increases abnormally but does not reach the fuse When the operating current threshold is lower, the energy of the abnormal current will continue to be consumed in a certain area of ​​the circuit with relatively small impedance, which will cause local overheating or even burnout of the board, seriously affecting the reliable operation of the server and accelerator card.

[0013] In addition, not only accelerator cards, but also the existing overcurrent protection mechanisms in many boards have more or less the above-mentioned deficiencies

Images