Converter with continuous current flowing through secondary windings
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United States of America Patent
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-
Feb 27, 2001
Grant Date -
N/A
app pub date -
Dec 23, 1999
filing date -
Dec 23, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The input side of a DC:DC converter emulates current fed topologies and replaces an active switch and associated components with a passive inductor, coupled between Vin and upper nodes of the primary transformer windings, that smoothes input current. Several output side topologies are disclosed that may be used with any input side configuration, and require no output snubbers. The output topologies use non-center-tapped secondary windings that are utilized 100% of the time. The output topologies advantageously use series-coupled capacitors, which configuration distributes voltage stress. The topologies advantageously provide two output voltages, Vo1 and Vo2.apprxeq.Vo1, or Vo2.apprxeq.-Vo1. The snubber-less output side topologies provide very low EMI content waveforms that may be switched at relatively high frequencies.
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