T06.7 - Mixed-Signal Sliding Mode Controller for Non-Inverting Buck-Boost Photovoltaic DC Optimizers

Tuesday, March 18, 2025

11:00 AM – 11:20 AM ET

Location: Level Three, A313

Technical Lecture Presenter(s)

Anurag Singh (he/him/his)

University of Colorado Boulder

Presentation Paper

Co-Author(s)

SP

Sayan Paul (he/him/his)

University of Colorado Boulder
Dragan Maksimovic, PhD (he/him/his)

University of Colorado Boulder
LC

Luca Corradini

University of Colorado Boulder

Photovoltaic (PV) dc optimizers require input voltage regulation over a wide range to maximize power extracted from PV panels. As such, seamless reference tracking and robust stability are required under all operating conditions. To address these challenges, this work introduces a mixed-signal sliding mode controller for non-inverting Buck-Boost (NIBB) dc optimizers. The controller, implemented using mixed-signal resources of a low-cost DSP platform, achieves seamless reference tracking in pass-through mode – where the input voltage is equal to the output voltage – while retaining the reduced inductor and switch current stresses typical of multi-mode NIBB modulations. Experimental results are presented for a 600 W NIBB converter prototype.