Common mode current circuit diagram for non-isolated power supplies

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin
L0504-Murata muRata common mode inductor 90Ω 150mA

Overview:
The common mode current of a non-isolated power supply can become an electromagnetic interference (EMI) source. Have you ever eliminated it? In some high-voltage power supplies, such as the ones used in LED bulbs, you may find that you cannot eliminate them. After careful inspection, it was found that the non-isolated power supply is no different from the isolated power supply. The switching node grounds the parasitic capacitance to produce a common mode current.
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Damping and Absorption Capacitors

MKP capacitor


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