How to determine the common-mode inductance of a switching power supply, judging by the resistance value 3

5. Operating Frequency Range: Common mode inductors need to operate effectively within the set operating frequency range.

6. Temperature characteristics: Common mode inductors need to maintain stable performance within the operating temperature range. diode

7. Package and Size: Choose the appropriate package and size according to the application scenario.

To evaluate the performance of common mode inductors, impedance curves, DC resistance, saturation current, and other parameters are usually measured using inductance testing instruments, rather than relying solely on resistance values. When designing switch mode power supplies, engineers will select appropriate common mode inductors based on application requirements and conduct actual circuit testing to ensure that the inductors can effectively reduce EMI and meet relevant electromagnetic compatibility (EMC) standards. diode