LAUSR

The on–off controlled very-high-frequency Class E dc–dc converter has been extensively investigated for achieving high power density and fast dynamic response. However, the basic on–off control cannot limit the output current at overload or short-circuit condition. In this letter, we propose an on–off control with a current limitation function by adding an output current closed loop for reducing the output voltage reference when overload or short circuit occurs. The design considerations for the output current regulator are given. A prototype of a 30-MHz, 10-W Class E dc–dc converter is fabricated and tested in the lab, and the experimental results are provided to verify the effectiveness of the proposed control scheme.