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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...
The sub-harmonic oscillation of digital average current (DAC) control buck converter with single-edge modulation (trailing-edge modulation and leading-edge modulation) is investigated in this paper. It has been shown that both digital slope compensation (DSC) and digital reposition compensation (DRC) of duty ratio ac component can not be used to eliminate the sub-harmonic oscillation of DAC control...
Digital average current (DAC) control of buck converter with single-edge modulation (trailing-edge modulation and leading-edge modulation) is studied in this paper. To calculate the average inductor current with minimum calculation and appropriate precision, a new method called as four-point-mean method is proposed. The control laws for trailing-edge modulation and leading-edge modulation are derived...
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