Common-mode inductance

9 month ago

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Xuzhou Jiuli Electronics Co., Ltd

10 month

Product details

The selection method and precautions of common mode inductors

Selection method

Step 1: Determine the circuit properties

Step 2: Determine electrical parameters

Step 3: Determine the filter frequency band

Step 4: Determine the inductance parameters

Selection precautions:

A. In the frequency band of common-mode inductance filter, the larger the common-mode impedance, the better the common-mode filtering effect, so the device with higher impedance value should be selected as far as possible; However, for high-speed differential signals, the differential mode impedance of attention has a certain effect on signal transmission, so the differential mode impedance of attention is as small as possible.

B. the inductance value of the common mode inductance when selecting the signal line, the inductance value is used as a reference, and the filter effect is mainly evaluated by the impedance value in the reference impedance frequency curve;

C. the rated current of the common mode inductor, in the application of the power supply circuit, need to derate design, generally recommended rated current should be ≥ the maximum working current of the circuit;

D. the rated voltage of the common mode inductor, in the application of the power supply circuit, it is necessary to consider its rated voltage ≥ the working voltage between the lines;

E. according to the circuit type of the device application, determine the differential mode impedance range of the common mode inductor: power circuit - it is not necessary to consider the impact of the differential mode impedance of the inductor on the circuit;

Signal circuit - Within the signal operating frequency range, the differential mode impedance is as close as possible to the differential impedance characteristics of the signal's transmission line, without affecting normal signal transmission.

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Xuzhou Jiuli Electronics Co., Ltd

Audited supplier

10 month

Main Product: Electronic Transformer , High-frequency Transformer, Switching Power Supply Transformer, Differential Mode Inductor, I-type Inductor, Common Mode Inductor

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