Patent ID: 7076054
Filing Date: 2006-07-11
Classification: H04M

Abstract:
1. An interface for coupling a controllable power supply to a load comprising: a current mode setpoint circuit that is operative to generate a control voltage for controlling the operation of said controllable power supply in accordance with an input current supplied thereto; a current feedback and voltage level shift circuit adapted to be coupled in a current flow output path between an output of said controllable power supply and said load, and being operative to controllably divert power supply output current away from said current flow output path to said current mode setpoint circuit, based upon a prescribed relationship between said power supply output current and a predetermined output current characteristic, and to shift the level of the output voltage applied by said controllable power supply to said load to a reduced control voltage for controlling the operation of said controllable power supply; and a temperature-insensitive voltage feedback and voltage level shift circuit adapted to be coupled to said current flow output path feeding said load, and being operative to controllably divert power supply output current away from said output path to said current mode setpoint circuit, based upon a prescribed relationship between a voltage across said load and a predetermined load voltage characteristic, and to shift the level of the output voltage applied by said controllable power supply to said load to said reduced control voltage for controlling the operation of said controllable power supply.