The Sustained Oscillation Suppression Technique with an RC Snubber Circuit for GaN Devices

Gallium nitride (GaN) devices are being widely used due to their excellent performance when integrated into power electronics applications. However, the near-ideal features sometimes cause unexpected behavior in a practical system, such as sustained oscillation. In this paper, an RC snubber circuit is adopted to suppress this oscillation in a half-bridge circuit, which is simpler and more effective than other existing solutions. Moreover, the method of determining the RC region is described, which makes up for the deficiencies of only qualitative suppression methods. The theoretical analysis results are verified by the simulation and experiment results, which indicates a significant improvement in system performance.