N-bit digital-to-analogue converter and mixed-signal microcontroller

A mixed-signal microcontroller for current mode control of a switched-mode power supply, wherein the mixed-signal microcontroller comprises:

• (i) a compensation control logic configured to provide a series of digital compensation control values derived from a voltage sense signal, with the voltage sense signal being based on a power supply output voltage of the switched-mode power supply;
• (ii) a slope compensation logic configured to provide a series of digital slope compensation values, with the series of digital slope compensation values being adapted to the switched-mode power supply;
• (iii) an N-bit digital-to-analogue converter configured to receive as input the series of digital compensation control values and the series of digital slope compensation values and to provide as output a control voltage signal based on the input, wherein N is a positive integer, the N-bit digital-to-analogue converter comprises at least one register, an evaluation logic and a converter, the at least one register comprises an output data register t least N bits and further comprises M enhancement bits, M is a positive integer, the N-bit digital-to-analogue converter is configured to store received digital data in the output data register and in the M enhancement bits, the evaluation logic is configured to provide at least one binary evaluation signal derived from the received digital data stored in the output data register and in the M enhancement bits, each binary evaluation signal of the at least one binary evaluation signal has as possible values respectively a first binary evaluation signal value and a second binary evaluation signal value, the converter is configured to receive the at least one binary evaluation signal, and the converter has access to the output data register and is configured to provide an output voltage based on the output data register and the received at least one binary evaluation signal;
• (iv) a comparator, wherein the comparator is configured to compare the control voltage signal to a voltage of a current sense signal, with the current sense signal being based on a current through the switched-mode power supply, and to provide as output a comparator voltage signal;
• and
• (v) a drive control logic, wherein the drive control logic is configured to receive as input the comparator voltage signal and to provide as output a drive signal for a switch of the switched-mode power supply.