Patent ID: 8278899
Filing Date: 2012-10-02
Classification: H02M

Abstract:
1. A digital slope compensation apparatus for a switched-mode power supply, comprising: a sensor for sensing an analog inductor current (i a comparator for generating a trigger signal according to a comparison of an analog current threshold level and the analog inductor current (i a pulse width modulator (PWM) for controlling the operation of the switched-mode power supply, wherein the pulse width modulator (PWM) is arranged to be triggered by the trigger signal of the comparator, characterised in that a first analog to digital converter is arranged for converting an analog output voltage (V at least one transformation module is arranged for transforming the digital output voltage into a digital current threshold level (i a digital to analog converter is arranged for generating the analog current threshold level according to the digital current threshold level (i a voltage controller is arranged to receive the digital output voltage and to generate a digital current reference (i*), a second analog to digital converter is arranged to convert the analog inductor current (i a digital slope compensation module is arranged to receive the digital current reference (i*), the digital inductor current, and a compensation factor (k