RF Power Amplifier, 2nd Edition

Thus, the overall diode conduction loss is

11.110

The diode conduction loss decreases when the duty cycle increases at a fixed load current . At = 0, the diode is ON for the entire cycle, resulting in a maximum conduction loss. At = 1, the diode is OFF for the entire cycle, and therefore the conduction loss is zero.

Typically, the power loss in the inductor core can be ignored and only the copper loss in the inductor winding should be considered. The inductor current can be approximated by

11.111

leading to its rms value

11.112

Therefore, the inductor conduction loss is

11.113

and the maximum ...