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A novel control technique, called bifrequency pulse-train (BF-PT) control technique, for switching dc–dc converters is proposed. In contrast to the conventional pulsewidth-modulation-based control technique of switching dc–dc converters, which realizes the output voltage regulation by adjusting the duty ratio of the control pulse cycle by cycle, the BF-PT control technique realizes the output voltage...
Pulse width modulation (PWM) has been one of the most conventional modulation techniques for switching dc-dc converters. It compares error signal with sawtooth wave to generate the control pulse. Conventional PWM control technique suffers from slow dynamic response due to smooth error signal variation under step line or load variation. A novel PWM control (modulation) method for switching dc-dc converters...
Dynamic response of boost power factor correction (PFC) converter operating in continuous-conduction mode (CCM) is heavily influenced by low-bandwidth of voltage control loop. A novel tri-state boost PFC converter operating in pseudo-continuous-conduction mode (PCCM) is proposed in this paper. An additional degree of control-freedom introduced by a freewheeling switching control interval helps to...
A novel constant on-time bi-frequency (COT-BF) control technique for switching dc-dc converters operating in discontinuous conduction mode (DCM) is proposed in this paper. The proposed COT-BF control technique realizes the output voltage regulation of switching dc-dc converters by adjusting the combination of high-frequency control pulse and low-frequency control pulse. COT-BF control technique is...
Voltage-mode pulse-train (PT) control for single-inductor dual-output (SIDO) buck converter operating in discontinuous-conduction mode (DCM) is investigated in this paper. By using time-multiplexing (TM) scheme, each output of converter is regulated in its corresponding time slot to avoid cross-regulation of two outputs. “Blank pulse” is adopted to improve the performances of the converter in light...
Multi pulses regulation (MPR) control technique, a novel control technique for the control of switching DC-DC converter is proposed. Unlike traditional Pulse Regulation (PR) control technique which realizes the control of switching DC-DC converters by the corresponding combination of two different pulses, MPR control technique extends these two different pulses to multi pulses, and thus overcome some...
Digital peak current (DPC) control, digital peak voltage (DPV) control, and digital peak voltage/peak current (DPV/DPC) control of buck converter with leading-edge modulation are studied and compared in this paper. The AC small signal transfer functions of control-to-output, input-to-output and output impedance are derived and the corresponding comparison studies are performed. Transient simulation...
This paper explores digital average current (DAC) control buck converter with dual-edge modulation (trailing-triangle modulation and leading-triangle modulation). It is found that DAC control with dual-edge modulation doesnpsilat have sub-oscillation problems. As the same as conventional digital control of switching dc-dc converter, there is also one switching cycle time delay between sampling and...
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