FPGA-based multi-phase digital pulse width modulator with dual-edge modulation

Abstract

This paper proposes a new FPGA-based architecture for a multi-phase digital pulse width modulator (MP-DPWM). A novel fine-leading/coarse-trailing edge modulation is applied to allow the sharing of a single fine resolution block for all phases.

High-order sliding-mode control for DC-DC converters

“…One may find the conditions (14), (16) and (17) are satisfied by the Buck converter easily. So the proposed control algorithm is feasible to force the output voltage of Buck converter tracking the reference voltage in finite time.…”

“…A lot of works are presented in order to improve the robustness of DC-DC [1]- [10]. Many advanced digital control methods, such as digital PWM controller [11][12][13][14], Auto-tuning control [15][16][17] and Robust LQR Control[],are introduced into DC-DC converter which is based on micro-controller, programmable logic device. Traditional linear control methods, which are small-signal-based [6], for DC-DC converter neglect nonlinearities which may result in deteriorated output signal or unstable behavior in presence of large perturbations [18].…”

Hybrid modulator for power converters in parallel topology

“…On the other hand, some recent works address the implementation of multiphase digital modulators in order to apply interleaving in parallel multiconverter arrangement, [15,16]. However, the combined application of interleaving and SFM techniques is an open research field.…”