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Cause analysis of short circuit of chip inductor

Date：2021-08-13 Viewed：4258

For the SMD inductor, short circuit is not easy to occur under basic conditions, and a large part of the reasons for short circuit are that the current in the circuit is too high, exceeding the rated voltage of SMD inductor, and the current is too high for a long time. If the current is too high for a long time, the cable sheath on the surface of the wire package of the SMD inductor will be melted, and the short circuit will appear in the future. Once the inductor appears, the main physical parameters of the inductor itself will change greatly. Then the problem is coming. What is the reason for the short circuit of the patch inductor? The following explanation is as follows.

Cause of short circuit of chip inductor
(1) The inductance of the patch inductance will be reduced a lot. If the patch inductance can not meet the requirements of the circuit, there may be risks in application;
(2) The resistance value of the SMD inductor will be reduced, because the cable sheath of the wire-wrapped wire is burnt out, and the wire-wrapped wire without the cable sheath is in contact with each other, which is equivalent to the contact between transmission lines, and the resistance value will of course be reduced;
(3) After the chip inductor is short-circuited in the circuit, if it is still working, the chip inductor will be irreversibly damaged, causing the chip inductor to be short-circuited immediately;
(4) Short-circuit phenomenon rarely occurs in basic applications. Once it occurs, it indicates that there is a problem in the circuit. It is necessary to quickly check the problem in the circuit to avoid unnecessary damage;
贴片电感出现短路原因分析

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Cause analysis of short circuit of chip inductor

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