Bias supply, a power supply and a method of using bias supply voltage levels to signal information across an isolation barrier

摘要

A bias supply, a method of communicating data across an isolation barrier and a power supply are provided herein. In one embodiment, the bias supply includes: (1) a bias supply transformer having a primary winding inductively coupled to a secondary winding across an isolation barrier, (2) a controller configured to direct operation of the bias supply and (3) bias voltage manipulating circuitry, coupled to an input of the controller, configured to receive primary data and based thereon alter a secondary bias output voltage of the secondary winding between defined voltage levels by varying a voltage provided to the controller, the controller and the bias voltage manipulating circuitry located on the primary side.

主权项

1. A bias supply having a primary side and a secondary side, comprising;
a bias supply transformer having a primary winding inductively coupled to a secondary winding across an isolation barrier; a controller located on said primary side and configured to direct operation of said bias supply; and bias voltage manipulating circuitry located on said primary side and coupled to an input of said controller, said bias voltage manipulating circuitry configured to receive primary data and based thereon alter transitions of a secondary bias output voltage of said secondary winding between defined voltage levels by varying a voltage provided to said controller; wherein said bias voltage manipulating circuitry is configured to vary one of a sensed voltage and a reference voltage, provided to said controller to alter said secondary bias output voltage.