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Würth Elektronik Watts Up Podcast


Dec 9, 2021

Conducted interference occurs in the input circuit, whereby other electrical equipment can be disrupted, so the conducted interferences are first checked at the beginning of an EMC test of power supplies. In today's podcast, based off an Application Note, we discuss the procedure for examining differential mode interference in the input circuit of DC/DC switching regulators.

Download the Application Note, ANP101, at www.we-online.com/appnotes or click here.

Figure 1:

Input Current of a DC-DC Switching Regulator

Figure 2:

Design of a DC-LISM According to CISPR 25

Figure 3:

 Peak Value Measurement of the Interference Voltage Under Full Load

Figure 4:

Peak Value Measurement of the Interference Voltage at Low Load