POWER SUPPLY APPARATUS WITH ACTIVE CLAMPING CIRCUIT

摘要

A power supply apparatus includes a power supply circuit and an active clamping circuit. The power supply circuit includes a secondary side rectifying unit and a voltage output side. The active clamping circuit includes a clamping energy-storing unit, a feedback control unit and a synchronous buck converter. The clamping energy-storing unit clamps and stores a voltage spike to obtain an energy-storing voltage. The feedback control unit detects the energy-storing voltage and informs the synchronous buck converter of the energy-storing voltage. The synchronous buck converter receives the energy-storing voltage and adjusts the energy-storing voltage to obtain an adjusted voltage when the energy-storing voltage is greater than a predetermined voltage. The synchronous buck converter sends the adjusted voltage to the voltage output side.

主权项

1. A power supply apparatus comprising:
a power supply circuit; and an active clamping circuit electrically connected to the power supply circuit, wherein the power supply circuit comprises: a secondary side rectifying unit electrically connected to the active clamping circuit; and a voltage output side electrically connected to the active clamping circuit and the secondary side rectifying unit, wherein the active clamping circuit comprises: a clamping energy-storing unit electrically connected to the secondary side rectifying unit; a feedback control unit electrically connected to the clamping energy-storing unit; and a synchronous buck converter electrically connected to the clamping energy-storing unit, the feedback control unit and the voltage output side, wherein the clamping energy-storing unit clamps and stores a voltage spike to obtain an energy-storing voltage; the feedback control unit detects the energy-storing voltage and informs the synchronous buck converter of the energy-storing voltage; the synchronous buck converter receives the energy-storing voltage and adjusts the energy-storing voltage to obtain an adjusted voltage when the energy-storing voltage is greater than a predetermined voltage; the synchronous buck converter sends the adjusted voltage to the voltage output side.