SWITCHING POWER SUPPLY DEVICE AND BATTERY CHARGER INCLUDING THE SAME

摘要

A switching power supply device includes a full-bridge circuit comprising a plurality of switching devices, a transformer comprising a primary coil and a secondary coil, the primary coil being connected to an output of the full-bridge circuit, and a DC/DC converter comprising a rectifier circuit. The rectifier circuit includes a plurality of diodes and is connected to the secondary coil to rectify a voltage outputted from the secondary coil. A snubber circuit includes a first snubber diode connected to an intermediate point of the secondary coil, a second snubber diode connected in series with the first snubber diode, the second snubber diode being connected to one end of an output capacitor, and a snubber capacitor connected between a node between the first and second snubber diodes and a positive side output of the rectifier circuit.

主权项

1. A switching power supply device comprising:
a full-bridge circuit comprising a plurality of switching devices; a transformer comprising a primary coil and a secondary coil, the primary coil being connected to an output of the full-bridge circuit; a DC/DC converter comprising a rectifier circuit, wherein the rectifier circuit comprises a plurality of diodes and is connected to the secondary coil to rectify a voltage outputted from the secondary coil; and a snubber circuit comprising a first snubber diode connected to an intermediate point of the secondary coil, a second snubber diode connected in series with the first snubber diode, the second snubber diode being connected to one end of an output capacitor, and a snubber capacitor connected between a node between the first and second snubber diodes and a positive side output of the rectifier circuit.