Patent ID: 7157890
Filing Date: 2007-01-02
Classification: H02J

Abstract:
1. A power supply system, comprising: a plurality of power supply modules, each of the plurality of power supply modules having a power output coupled in parallel; each of the power supply modules has a controller for controlling the power output thereof; each controller has a first analog input, a second analog input, a first pulse width modulation (PWM) output, and a second PWM output; wherein the second PWM output represents a power output of an associated one of the plurality of power supply modules and is coupled to a power averaging circuit that generates a first signal representative of an average power desired from each of the plurality of power supply modules; the second analog input is coupled to the first PWM output through a first low pass filter, wherein the first low pass filter produces a reference voltage on the second analog input; and the first analog input is coupled to the first signal representative of the average power desired from each of the plurality of power supply modules.