Converter and method of controlling the same

A converter, comprising:

• a converting circuit configured for converting an input voltage into an output voltage;
• a current sensing circuit configured for sensing an input current corresponding to the input voltage or an output current corresponding to the output voltage to generate a current sensing signal;
• a voltage sensing circuit configured for sensing the output voltage to generate a voltage sensing signal;
• a digital controller circuit configured for receiving the voltage sensing signal and generating a digital signal in response to the voltage sensing signal;
• a digital-to-analog converting integrated circuit configured for converting the digital signal into an analog signal;
• a slope compensation circuit which is not integrated in the digital-to-analog converting integrated circuit and is disposed outside the digital controller circuit, the slope compensation circuit configured for generating an analog slope compensation signal exclusively to be superimposed on one of the current sensing signal and the analog signal;
• and
• a comparator circuit configured for comparing the analog signal with the superimposition of the analog slope compensation signal and the current sensing signal or configured for comparing the current sensing signal with the superimposition of the analog slope compensation signal and the analog signal to generate a comparator output signal for a control operation of the converting circuit.

A method of controlling a converter for converting an input voltage into an output voltage by a control operation of a converting circuit, the method comprising:

• sensing an input current corresponding to the input voltage or an output current corresponding to the output voltage to generate a current sensing signal;
• generating a digital signal by a digital controller circuit according to a voltage sensing signal corresponding to the output voltage;
• converting the digital signal into an analog signal by a digital-to-analog converting integrated circuit;
• exclusively generating an analog slope compensation signal by a slope compensation circuit independent from the digital-to-analog converting integrated circuit;
• superimposing the analog slope compensation signal on the current sensing signal or superimposing the analog slope compensation signal on the analog signal;
• and
• comparing the analog signal with the superimposition of the current sensing signal and the analog slope compensation signal or comparing the current sensing signal with the superimposition of the analog signal and the analog slope compensation signal to generate a comparator output signal by a comparator circuit for a control operation of the converting circuit.