PWM controller with one cycle response

摘要: A new nonlinear control technique that has one cycle response, does not need a resettable integrator in the path, and nearly constant switching frequency. It obtains response by forcing error between switched-variable reference to zero each cycle, while on-pulse of controller is adjusted ensure near The small frequency variation due variations signal supply voltage delays circuit are quantified. Using double-edge modulation, further reduced, thus associated distortion minimized. An experimental 0-20 kHz bandwidth, 95 Watt RMS power audio amplifier using method demonstrates applicability this for high fidelity applications. ripple rejection (PSRR) 63 dB at 120 Hz. Additionally, total harmonic plus noise (THD+N) less than 0.07% measured with 15%.