Package Design Consideration for Suppressing Radiated EMI Noise in Semi-Bridgeless PFC Converters

A semi-bridgeless power factor correction (PFC) converter offers an excellent trade-off between efficiency, conducted electro-magnetic interference (EMI) performance, and cost. However, reduction of radiated EMI remains as an issue. This paper proposes a multichip package design for realizing low radiated EMI semi-bridgeless PFC converters. The proposed package design was applied to a 1.0 kW semi-bridgeless PFC converter and reduction of the radiated EMI was successfully demonstrated.