Converter Technology

Compensator Design

Once the frequency response of the power stage has been calculated, a controller needs to be used to close the loop. The frequency response of the controller needs to be designed to give an overall control loop with the following characteristics:-

  • High gain at low frequencies to give excellent DC set point accuracy
  • High loop cross-over frequency to give the best possible transient response to rapid changes in load or input voltage
  • Loop phase shift significantly less than 180