https://github.com/jamesmunns/lipo-stamp

A tiny Li-Po/Li-Ion charging management SoM
https://github.com/jamesmunns/lipo-stamp

Last synced: 11 days ago
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A tiny Li-Po/Li-Ion charging management SoM

• Host: GitHub
• URL: https://github.com/jamesmunns/lipo-stamp
• Owner: jamesmunns
• Created: 2020-11-21T09:19:33.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2021-01-15T14:06:40.000Z (almost 4 years ago)
• Last Synced: 2024-10-09T07:10:49.826Z (30 days ago)
• Language: Shell
• Size: 14.7 MB
• Stars: 16
• Watchers: 3
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# LiPo Power Stamp

This is intended to be a small sized, general purpose LiPo charge controller with power path and a 3v3 regulator. Currently the targeted size is 0.7" by 0.7", or just under 18mm square. It is intended to be used with 3.7V nominal cells.

## Features

* TP4056 Charge Controller

    * 500mA charging current

    * Low voltage trickle charging

* Over/Under-voltage Protection

    * AP9101CK6 + FS8205

    * Disables cell on over/under charge

* Power Path

    * Provides power via USB when connected

    * 500mA max output (USB or Cell)

* Switchable 3v3 Regulator

    * Default off

    * 100mA+ output

* Resettable Polyfuse

    * For high current, direct battery applications (e.g. LEDs)

    * Max 2A continuous output

## Stamp v0.3.0

This is the current version of the board.

![stamp render front](./assets/lipo-stamp.png)

![stamp render back](./assets/lipo-stamp-back.png)

### Design Files

* [Schematic](./assets/stamp-schematic.pdf)

* [Layout](./assets/stamp-layout.pdf)

## Proto Version

The first version is a larger scale test board.

The [schematic](./assets/proto-schematic.pdf) is also available as PDF.

![test board](./assets/lipo-stamp-proto.png)