Power converter and power conversion method with reduced power consumption
AssigneeOsram Sylvania Inc.
InventorVictor M. Simi
Life of this patent
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Abstract
A power converter and power conversion method converts an input AC signal to a voltage usable by a load while reducing power consumption, thereby making the converter and method suitable for a wider range of applications. A rectifier receives the AC input signal and outputs a rectified voltage Vs, a controller has a power input connected to Vs and outputs two out-of-phase signals, two transistors are connected in series between Vs and a ground and each of the two transistors has a gate connected to a respective one of the two out-of-phase signals, and a transformer that has a primary coil connected to a node between the two transistors and a secondary coil connected to a load feeds back current from the secondary coil to the power input of the controller to reduce power consumption.
Claims4
A power conversion method, comprising the steps of:
- rectifying a received AC input signal to output a rectified voltage Vs;
- providing Vs to a power input of a controller, the controller outputting two out-of-phase signals;
- providing each of the two out-of-phase signals to a respective gate of two transistors connected in series between Vs and a ground;
- and in a transformer having a primary coil connected to a node between the two transistors and a secondary coil connected to a load, feeding back a current from the secondary coil to the power input of the controller.
Dependencies are inferred from the claim text.