A high-resolution digital PWM controller using capacitor integration

Abstract

For achieving better linear control in average power, in this paper, a new digital-controlled PWM controller using capacitor integration is proposed. By the integration on a single capacitor, this digital PWM controller can effectively improve the resolution of the conventional counter-based digital PWM but only have a lower clock frequency. Moreover, this proposed digital PWM also can avoid the dynamic power consumption and noise interference caused by high-speed switching of clock, and suit for applying in many power control systems.