Zero voltage switching supplies connected in parallel

摘要

A composite power supply comprises a master ZVS power supply and a slave ZVS power supply. Using a phase lock loop circuit, the composite power supply detects a phase relationship between switching of the first switch and switching of the second switch, and adjusts timing of switching of the second switch if the first switch and the second switch are not being switched at a predetermined phase relationship with each other. The outputs of the two power supplies are connected together. Thus, the master power supply contributes approximately half the output power and precision control on the output/load voltage while the slave power supply contributes approximately half the output power.