Power supply device
AssigneeFdk Corporation
InventorsShigeharu Yamashita, Tsunehiro Ohno, Kazuomi Watanabe
Life of this patent
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Abstract
A PFC (Power Factor Correction) circuit improves the power factor of rectified power. Upon receiving output of the PFC circuit, a first DC-DC converter generates a voltage to be supplied to a load. Upon receiving output of the PFC circuit, a second DC-DC converter and a third DC-DC converter generate a control voltage. The second DC-DC converter and the third DC-DC converter are cascade-connected. An input terminal of the third DC-DC converter is connected to both an output terminal of the second DC-DC converter and an output terminal of the first DC-DC converter.
Claims7
A power supply device comprising:
- a PFC (Power Factor Correction) circuit configured to improve the power factor of rectified power;
- a first DC-DC converter configured to generate a voltage to be supplied to a load upon receiving output of the PFC circuit;
- and
- a second DC-DC converter and a third DC-DC converter configured to generate a control voltage upon receiving the output of the PFC circuit,
- wherein the second DC-DC converter and the third DC-DC converter are cascade-connected, and
- wherein an input terminal of the third DC-DC converter is connected to both an output terminal of the second DC-DC converter and an output terminal of the first DC-DC converter.
Dependencies are inferred from the claim text.