Solar MPPT Power System - page.json

by TylerK

A 30 W solar battery charger with regulated 5 V and 3.3 V rails: an STM32G031 running perturb & observe MPPT and a CC/CV charge state machine, steering a TI LM5175 4-switch buck-boost through a single analog control input. Four-layer KiCad board, schematic and PCB generated from Python, with an electrothermal simulation run against the published board file.

Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

History Download

TylerK Update 51 file(s) 805d738 1mo ago

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

{
  "title": "Solar MPPT Power System",
  "brief": "A 30 W solar battery charger with regulated 5 V and 3.3 V rails: an STM32G031 running perturb & observe MPPT and a CC/CV charge state machine, steering a TI LM5175 4-switch buck-boost through a single analog control input. Four-layer KiCad board, schematic and PCB generated from Python, with an electrothermal simulation run against the published board file.",
  "type": "component",
  "kind": "board",
  "visibility": "public",
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "source": {
    "tool": "kicad",
    "version": "10.0.2"
  },
  "tags": [
    "hardware",
    "board",
    "pcb",
    "kicad",
    "solar",
    "mppt",
    "power-electronics",
    "battery-charger",
    "buck-boost",
    "mcu",
    "stm32",
    "firmware",
    "lm5175",
    "ina180",
    "current-sense",
    "generated",
    "electrothermal-simulation",
    "firmware-testing"
  ],
  "slug": "mppt-power-system",
  "version": "11.0.0",
  "description": "A 30 W solar battery charger with regulated 5 V / 3.3 V rails. STM32G031 MCU runs P&O MPPT plus a CC/CV charge state machine and drives a TI LM5175 4-switch synchronous buck-boost via its FB pin; two INA180 shunt amplifiers close the current loops and an LM74700 provides active reverse-polarity protection. 173 x 118 mm 4-layer board, 7,098 track segments, generated entirely from Python. Eight revisions, each driven by an electrothermal model and a first-build audit run against the published board file. Against revision 5: total copper loss 491.6 -> 199.7 mW, peak current density 120.4 -> 47.2 A/mm2, peak board temperature 46.0 -> 42.0 C, on 17% less panel area. Verified 0 unconnected items, 0 shorts, 0 clearance violations, 0 mechanical DRC findings, every net continuous by exact geometry, all fourteen electrothermal cases solving against the published board's own SHA-256. Firmware cross-compiles for Cortex-M0+ and passes 16 control-loop property tests.",
  "dependencies": {},
  "author": {
    "name": "TylerK",
    "email": "[email protected]"
  }
}