POWER SUPPLY CONTROL CIRCUIT, RELATED POWER SUPPLY AND METHOD OF OPERATING A POWER SUPPLY
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Sep 20, 2024
filing date -
Sep 20, 2024
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a power supply control circuit for a power supply, including a PFC converter configured to generate a bus voltage, an electronic converter and an auxiliary power supply configured to generate an auxiliary supply voltage. The PFC converter comprises a PFC control circuit configured to drive the PFC converter to regulate the bus voltage to a requested value. When the output power is greater than the threshold, the power supply control circuit supplies the PFC control circuit with the auxiliary supply voltage. When the output power is smaller than the threshold, the circuit compares the bus voltage to upper and lower thresholds. When the bus voltage is greater than the upper threshold, the circuit inhibits supply of the PFC control circuit with the auxiliary supply voltage. When the bus voltage is smaller than a lower threshold, the circuit supplies the PFC control circuit with the auxiliary supply voltage.
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