| 摘要 |
A digital slope compensation apparatus and method for a switched-mode power supply use a sensor for sensing and generating an analog inductor current ( i L ) of the switched-mode power supply, a comparator (2) for generating a trigger signal according to a comparison of an analog current threshold level and the analog inductor current ( i L ), and a pulse width modulator (PWM) for controlling the operation of a switched-mode power supply, wherein the pulse width modulator (PWM) is arranged to be triggered by the trigger signal of the comparator. A first analog to digital converter is arranged for converting an analog output voltage ( V out ) of the switched-mode power supply into a digital output voltage, means are arranged for transforming the digital output voltage into a digital current threshold level ( i cmp ), and a digital to analog converter is arranged for generating the analog current threshold level according to the digital current threshold level ( i cmp ).
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