Patent ID: 8751021
Filing Date: 2014-06-10
Classification: H02M

Abstract:
1. A system comprising: a model processor that provides a model of a power supply, wherein said model reflects changes in said power supply, and that receives an estimated disturbance; and a disturbance estimating circuit that provides said estimated disturbance from a difference between a sensed output of said power supply and an output generated by said model processor, wherein said disturbance estimating circuit comprises a proportional integral component that provides said estimated disturbance, and wherein said estimated disturbance includes an estimated load current; wherein said model processor receives a duty cycle multiplied by a predetermined gain and provides an estimated state of said power supply and said output based on said duty cycle, wherein said predetermined gain is a gain matrix, and wherein said gain matrix comprises elements derived from values of components of said power supply including an inductance, a capacitance, a parasitic resistance of said inductance, and a parasitic resistance of said capacitance; an oversampling modulator that provides said difference between said sensed output and said output, wherein said difference includes an oversampled difference provided to said disturbance estimating circuit, and wherein said disturbance estimating circuit outputs an oversampled estimated disturbance; and a low pass filter that filters said oversampled estimated disturbance and that provides said estimated disturbance.