Power supply apparatus for reduction of power consumption
AssigneeFidelix Y.K.
InventorNakagawa Shin
Life of this patent
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Abstract
A power supply apparatus having an AC power supply, a transformer, a switching element and a control circuit for controlling an operation of the switching element: where an electrical current is supplied to the primary side of the transformer intermittently when a main unit of an electrical appliance to which the power supply apparatus is applied is in a standby mode so that unnecessary power consumption is reduced. Further, a capacitance is provided between the AC power supply and the control circuit instead of the conventional initializing resistance and the control circuit is driven using an electrical current going through a reactance component of the capacitor, so that the energy loss is not caused any more by the initializing resistance.
Claims11
An off-line type switching mode, power supply apparatus, said apparatus comprising:
- an AC power supply;
- a transformer;
- a rectification circuit arranged on a primary side of said transformer;
- a switching element for switching an electrical current supplied into said transformer based on an oscillating operation;
- and
- a control circuit for controlling an operation of said switching element, including an operation to stop said switching operation of said switching element, wherein said control circuit is provided at a primary side of the transformer and said control circuit controls said switching element in such a manner that said oscillating operation can be carried out in an intermittent manner when said power supply apparatus is in a stand-by condition or at least in a condition that a load generated in the power supply apparatus is low.
Dependencies are inferred from the claim text.