Transformer circuit and method of reducing idling power consumption
AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorWendong LI
Life of this patent
Estimating the term…
Abstract
Disclosed are a transformer circuit and a method of reducing idling power consumption. The transformer circuit comprises a transformer and an auxiliary winding circuit. The transformer comprises a core, a primary winding, a secondary winding and an auxiliary winding. The auxiliary winding circuit is connected to the auxiliary winding. The auxiliary winding circuit comprises a first power supply circuit and a second power supply circuit. The auxiliary winding comprises a first end, a second end and a tap located between the first end and the second end. The present invention can reduce idling power consumption.
Claims11
A transformer circuit, comprising a transformer and an auxiliary winding circuit, the transformer comprising a core, a primary winding, a secondary winding and an auxiliary winding, the auxiliary winding circuit connecting to the auxiliary winding, the primary winding, the secondary winding and the auxiliary winding respectively winding the core, the auxiliary winding circuit supplying power to a chip, the auxiliary winding circuit comprising a first power supply circuit and a second power supply circuit, the auxiliary winding comprising a first end, a second end and a tap located between the first end and the second end, wherein the first end of the auxiliary winding is connected to an input end of the first power supply circuit, the tap of the auxiliary winding is connected to an input end of the second power supply circuit, an output end of the first power supply circuit is connected to an output end of the second power supply circuit and a power supply end of the chip, the second end of the auxiliary winding is grounded;
- an input voltage of the second power supply circuit is smaller than an input voltage of the first power supply circuit;
- and the first power supply circuit is a voltage stabilizing circuit, the second power supply circuit is a voltage step-down circuit;
- wherein as an output voltage of the second power supply circuit is larger than an output voltage of the first power supply circuit, the first power supply circuit is turned off and the auxiliary winding supplies power to the chip via the second power supply circuit;
- and as an output voltage of the second power supply circuit is smaller than an output voltage of the first power supply circuit, the second power supply circuit is turned off and the auxiliary winding supplies power to the chip via the first power supply circuit.
Dependencies are inferred from the claim text.