Power supply apparatus for reduction of power consumption
First Claim
1. 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.
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Accused Products
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.
74 Citations
11 Claims
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1. An off-line type switching mode, power supply apparatus, said apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification