Inductor Current Envelope Based TCM/ZVS Operation of High Switching Frequency Single-Phase AC/DC Converter

This digest proposes an alternative TCM approach, where the positive and negative envelopes of the inductor current are captured using a simple analog maximum and minimum quasi-peak detector. The current envelope can be sampled with a low sampling rate and used to assure TCM with ZVS. Advantageously, the same control loop can also enable continuous conduction mode operation.