CHAOS CONTROL IN THE PWM VOLTAGE–MODE–CONTROLLED BUCK CONVERTER USING ADAPTIVE RAMP

Many techniques for controlling chaos in the PWM voltage–mode–controlled buck converter have been developed in or-der to provide simple configurations and easy to implement.Most of them use a ramp (V r) as a T –periodic waveform tocompare with the control voltage (V co). In [1, 2] it is dis-cussed about changing the amplitude in the ramp waveform.The method is called “Vin feedforward”, and it is based ondesigning the ramp amplitude to be proportional to Vin values.