microPower
Micro Power Supply
Project maintained by dermitza Hosted on GitHub Pages — Theme by mattgraham
The microPower power supply
TBA description
Features:
The microPower features:
Power input:
- VUSB: 5-5.5V
- VBAT: one-cell LiIon at max 4.2V *
Power output (Concurrent)
- Linearly regulated 3.3V, 400mA, 500mA peak
- Switching regulated 5V, 800mA
- Unregulated 3.3-5.5V (depending if battery or USB is providing power)
I/O
- USB to Serial
- I2C for sensors
Sensors (I2C)
- Battery fuel gauge
- Battery current sensing
Components used:
- FT232RL USB to serial converter (also providing VUSB)
- MCP73871 Battery charger and load balancer
- MIC5205 3.3V LDO Regulator
- MAX17043 Battery fuel gauge
- ACS711 Hall-effect current sensor
- MCP3021 10-Bit A/D Converter to I2C
Revisions & Issues
rev 0.1
Rev 0.1 is the first published revision. This revision is missing the following items:
- Power on/off switch. An on/off switch would be a useful addition instead of adding/removing the battery.
- Power LED. It would be useful to know when the board is powered and functional.
Files
- Altium project files (including required libraries for the headers)
- Gerber and NC Drill files
- Schematic PDF
License
All files are released under the CC BY-SA 3.0 licence.