IV loop (current-voltage loop): Tecnica di controllo di un DC/DC converter step-down con sense sul nodo di phase

A Novel Linear-Non-Linear Digital Control for DC/DC Converter with Fast Transient Response

In this paper, a digitally controlled multimodule DC-DC converter with fast transient response, based on a linear-nonlinear control is presented. The proposed digital control improves the stability of the system, cuts off the effects of limit-cycle and reduces the recovery time, by making the "effective" bandwidth of the system independent of the bandwidth of the linear control loop and limits, at the same time, output voltage variations. The digital control is AVP-compatible and halves the recovery time. Preliminary hardware tests on a single phase step-down converter are reported. The experimental results match simulation ones, obtained by modelling system with Matlab/Aldec mixed environm…

A novel digital control for DC/DC converters to improve steady-state performances

This paper describes an innovative digital PWM control implementation for low voltage, high current DC-DC converters. The proposed technique, based on the use of a low resolution DAC, improves steady-state performances, minimizing limit cycle effects. The novel technique is tested on a FPGA-based single phase buck converter operating at 250 kHz. A detailed description of the proposed architecture is given and test results, simulation and experimental ones, are shown

An innovative PWM loop control for VRMs

Linear Non Linear Digital control for DC/DC Converters with fast transient response PARTE II

This article presents a digital control that improves the stability of the system, solves the problem of the limit cycle, shortens the recovery time and limits the overcoming of the rectified output voltage. The digital linear-nonlinear control function for DC / DC converters is described. The simulation model in the mixed environment of matlab-simulink / active -hdl is described. Preliminary results of the preliminary hardware test on a step-down-phase converter are presented and simulation and experimental results are also presented.

A novel linear-non-linear digital control for DC/DC converters

In this paper, a digitally controlled multi-module DC-DC converter with fast transient response, based on a linear-non-linear control is presented. The proposed digital control improves the stability of the system, cuts off the effects of limit-cycle and reduces the recovery time, by making the "effective" bandwidth of the system independent of the bandwidth of the linear control loop and limits, at the same time, output voltage variations. The novel digital control is AVP-compatible and halves the recovery time. Preliminary hardware tests on a single phase step-down converter are reported. The experimental results match simulation ones, obtained by modelling system with Matlab/Aldec mixed …

Current-Sensing Technique for Current-Mode Controlled Voltage Regulator Modules

This paper introduces an innovative current-sense technique for voltage regulator modules (VRMs). The proposed method is applied to a multiphase buck converter although the converter topology does not affect the accuracy or effectiveness of the proposed technique. A RC network is parallel connected with the buck converter low-side MOSFET and the voltage signal across the sense capacitor reconstructs the inductor current waveform. The RC technique benefits from all the advantages of the most popular current-sensing technique, the inductor DC resistance current-sense method, cutting off its main disadvantage. The sense network design is oriented to obtain high immunity to noise and a great dy…

Linear-non-linear digital control technique for dc-dc converters with fast transient response

A novel digital control technique for DC/DC converters to improve steady-state performances

Linear-non-linear digital control for dc/dc converters with fast transient response

A linear-non-linear digital control for multi-module DC/DC converters that improves system stability, solves the limit-cycle problem, reduces recovery time and limits over- and under-shoots in regulated output voltage, is presented. A simulation model in Matlab-Simulink/Active-HDL mixed environment is described. Preliminary hardware tests on a single-phase step-down converter are reported. Simulation and experimental results are shown.

Non-Linear Digital Control for DC-DC Power Converter