Why does the inductance of the chip decrease?

The chip inductor has an electrical performance that is very important in use, that is, the inductance value! But many people in the process of using the chip inductor will encounter the sensing value is reduced to the situation, do you know what causes this?

The inductance value is an important performance parameter of the chip inductor, and it is an important parameter to measure the storage energy and filtering noise ability of the chip inductor. The inductance value of the patch inductor is usually directly related to the number of coil turns, the winding density and the type of magnetic core. When these aspects have not changed, what are the reasons that may cause a sudden decline in the inductance value of the patch?

1, the use of temperature change: may be the change of temperature caused by a sudden decline in the sensing value, under normal circumstances, when the temperature is reduced, will lead to the increase in the resistivity of the chip inductor, which will lead to its sensing value decreased;

2, it may be the change of humidity: the effect of humidity on the inductance is somewhat similar to the effect of temperature on the inductance. When the humidity decreases, the resistivity of the inductor will increase, and the inductance value of the chip inductor will decrease.

3, the product aging caused by the decrease in sensing value: if the chip inductor is used for a long time, it may lead to the aging of the chip inductor. The aging of inductor will cause its electrical performance to decline, which will also affect the inductive value.

4, long-term overload use: if the chip inductor runs in the overload state for a long time, it will also cause its sensing value to decrease.

In summary, there are many reasons for the decrease of the inductance value of the patch, and of course, there may be more than the four aspects mentioned above. In order to ensure the stability and reliability of the circuit, we need to check and maintain the chip inductance regularly. The problems found should be dealt with in time!

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