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micromppt

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@eigenlucy

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KiCad projectAll 111 files, ready to open in KiCad5.9 MB
For fabricationGerbers, drill and pick-and-placeGerbers and drill zip62 KBGerbers and drill zip: spv104016 KBGerbers and drill zip: spv1040t16 KBGerbers and drill zip: tl431-ovp16 KBGerbers and drill zip: voltage-window27 KBPick and place (CSV)1.6 KBPick and place (CSV): spv104035 BPick and place (CSV): spv1040t35 BPick and place (CSV): tl431-ovp35 BPick and place (CSV): voltage-window722 B
Schematic PDFEvery sheet, to read or print22 KB
3D modelThe board with its parts, for an enclosure (GLB)3D model (GLB)2.7 MB3D model (GLB): spv104043 KB3D model (GLB): spv1040t43 KB3D model (GLB): voltage-window145 KB
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README

micromppt

SPV1040 Based 5W MPPT Boost Charger With Autonomous Perturb-and-Observe Set Point Adjustment

Tiny, versatile, high efficiency solar charging, designed with Meshtastic clients in mind

This release has been configured for single cell lipo charging, and includes an XB3306 lithium battery protection circuit. I have tested this converter with avariety of cell chemistries, as well as supercapacitors, and I will release a more minimal SPV1040 package in the upcoming week with configuration guidelines to for a more general purpose multichemistry solar charging module. See the project page on my website for more configuration guidelines, panel recommendations, and ordering info (WIP).

Built with atopile and KICAD 9. See my atopile usage guide for help installing and using atopile

TO DO:

  • Split the project into a base micromppt module and a number of input and output projection modules
  • Solve Vout divider with assertions, add cutoff and BPC for other chemistries
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