Patent ID: 7315160

Claim:
A system for controlling a soft start for a switching converter, comprising: a switched power supply for generating an output voltage signal responsive to a compensation signal; a first analog to digital converter for comparing the output voltage signal to a corrected reference voltage signal and generating a voltage error signal responsive thereto; a compensation circuit for generating drive signals for the switched power supply responsive to the voltage error signal; a second analog to digital converter for converting the output voltage signal into a digital voltage signal; a microcontroller for low pass filtering the digital voltage signal and for taking a derivative of the filtered digital voltage signal to generate a voltage error offset signal; an offset circuit having a first input connected to receive the voltage error offset signal and a second input connected to receive a voltage reference signal and an output providing the corrected reference voltage signal, the offset circuit injecting the voltage error offset signal into the voltage reference signal to generate the corrected reference signal enabling the output voltage signal to operate linearly over an entire voltage range of the output voltage signal.