Power Supply With Reduced Power Losses During Standby Mode
AssigneeCreative Technology Ltd
InventorsJun Makino, Boon Ghee Ting
Life of this patent
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Abstract
There is provided a power supply for an electrical device operable in active mode and in standby mode. The power supply comprises a transformer having a primary winding on the primary side and a secondary winding on the secondary side. The primary winding is connectable to an AC voltage supply and is arranged to comprise N turns when the electrical device is in active mode and more than N turns when the electrical device is in standby mode. Circuitry on the secondary side is arranged to provide an output voltage for the electrical device during active mode.
Claims18
A power supply for an electrical device operable in active mode and in standby mode, said power supply comprising:
- a transformer comprising a primary winding on the primary side and a secondary winding on the secondary side,
- wherein said primary winding is connectable to an AC voltage supply and is arranged to comprise N turns when said electrical device is in active mode and more than N turns when said electrical device is in standby mode, and
- wherein circuitry on said secondary side is arranged to provide an output voltage for said electrical device during active mode.
The power supply of any one of the preceding claims, wherein said secondary side includes a first secondary winding and a second secondary winding.
A transformer for a power supply for an electrical device operable in active mode and in standby mode, said transformer comprising:
- a primary winding on the primary side, said primary winding being connectable to an AC voltage supply and being arranged to comprise N turns when said electrical device is in active mode and more than N turns when said electrical device is in standby mode;
- and
- a secondary winding on said secondary side.
Dependencies are inferred from the claim text.