Design Methodology of a ZVS Class-E Inverter with Fixed Gain

A ZVS Class-E inverter design is presented, aiming at Zero-Voltage Turn-On (ZVTO) and fixed voltage gain over a wide load range without adding components, changing duty cycle, or tuning switching frequency. Passive components could be designed and tuned one-by-one. The expectations were validated by a Class-E inverter switched at 6.78 MHz with 11-V input voltage, 16-V output voltage, and 25-W maximum output power. ZVTO is maintained with 9% output voltage increase over a 10:1 output power range.