Switched mode power supply responsive to current derived from voltage across energy transfer element input
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United States of America Patent
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Nov 12, 2002
Issued Date -
N/A
app pub date -
May 4, 2001
filing date -
Mar 2, 2000
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A switched mode power supply having a regulated reflected voltage. In one embodiment, a switched mode power supply includes a power supply regulator coupled between a positive input supply rail of the power supply and a primary winding of an energy transfer element. The reflected voltage across the primary winding of the transfer element is related to the output voltage across a secondary winding of the energy transfer element according to the turns ratio of the energy transfer element. The power supply regulator is coupled to regulate the reflected voltage across the primary winding, thereby regulating the output voltage across secondary winding. In one embodiment, the reflected voltage across the primary winding is sensed through a current representative of the reflected voltage received by the power supply regulator.
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