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The hysteretic PWM control method is one of the fastest control technique for the dynamic response of switching power converters. This paper proposes a practical and robust hysteretic PWM control method by employing an additional capacitor in a comparator circuit. This additional capacitor has a role to enlarge the initial hysteretic window voltage just after turn-on and turn-off of the switching...
A derivative PWM control method with constant switching frequency strong against incoming switching noise is proposed. The triangular voltage obtained from a simple RC network as a comparator input is employed to determine the duty ratio and an external clock signal is used to fix the switching frequency. Applying the proposed method to the buck converter, excellent dynamic performances and stable...
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