Description

This design is a digitally-controlled: solar DC/DC converter with maximum power point tracking (MPPT): for use in central or string solar inverters. It is a companion to TIDM-SOLAR-ONEPHINV: a grid-tied: single phase: DC/AC inverter. Together: TIDM-SOLAR-DCDC and TIDM-SOLAR-ONEPHINV comprise a  solar inverter for central or string topologies. This solar DC/DC converter consists of a two-phase interleaved boost converter for MPPT and a resonant LLC converter with isolation. A C2000™ Piccolo™ TMS320F28035 microcontroller (MCU) is the digital controller for the DC/DC converter: executing high frequency control loops and maximum-power point tracking algorithms. This design achieves full-load efficiency of greater than 94 percent: which allows for more overall energy output from a solar installation and reduces detrimental heat generation in the converter.