Zero voltage switching supplies connected in parallel
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United States of America Patent
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Aug 11, 1998
Issued Date -
N/A
app pub date -
Sep 22, 1997
filing date -
Aug 3, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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