4 Conclusion

Resonant ringing between parasitic components of the SN6505 and transformer primary side affect radiated emissions and can be reduced with RC snubber circuits. Measurements of the time domain, conducted emissions, and radiated emissions show that components for snubber circuits can be calculated using a measured resonance frequency and parasitic capacitance combined with calculated parasitic inductance and critical impedance values by following the steps and equations in this article.