Power converter having a low voltage regulator powered from a high voltage source
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
May 15, 2000
filing date -
May 15, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power supply arrangement including a transformer and a switching element coupled to a primary winding of the transformer and a power supply. The power supply includes a capacitor having a first terminal coupled to a junction of the primary winding and the switching element and a first diode coupled between the capacitor and an output node. The power supply further includes a discharge element, such as a resistor or a diode, coupled between the junction of the first diode and the capacitor and a power supply common. A voltage regulator, such as a Zener diode, is connected to the output node to produce a regulated voltage powered by the voltage applied to the transformer primary winding, with the regulated voltage being used to power the control circuitry.
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