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foc8313

This board was inspired by Foc-Ctrl-Lite. FOC8313 is a highly compact, feature rich, daisy-chainable, field oriented control board based around the DRV8313 3 phase half bridge driver. This board is highly configurable and upgradeable, and includes all the manufacturing files required start producing controllers for $\approx$ $20/board

Front Back
front back

Features:

  • Highly compact 35x35mm outline
  • 29x29 square M3 hole pattern
  • 12V to 35V operating range
  • 3.5A max per phase current
  • Onboard STM32F103CBTx microcontroller
  • Based on the DRV8313 3 phase half bridge driver
  • 2 x INA240A2D high side current sense amplifiers
  • 1 x AS5047D back mounted hall effect encoder
  • EEPROM to store configurations / calibrations etc.
  • Daisy chainable power and CAN
  • Programmable with USB-DFU or StLink - 6 pin tag connect
  • Auxilliary encoder/Timer port with 5V and GND
  • Auxilliary SPI/GPIO and I2C/UART port with 5V and GND
  • Easily upgradable for isolated CAN (3 wire)
  • Extremely compact isolated CAN
  • JLC manufacturing files included
  • Cost optimised for PCBA with JLCPCB (as few extended components as possible)
  • Most basic variant costs $\approx$ $20 per board (for 10 PCBs at JLCPCB)
  • Predominantly single sided design allows for cost effective single sided PCBA, easy hot plating for rework, easy configuration with jumpers
Top In1
top in1
In2 Bottom
in2 bottom

PCBA - Cost Scaling:

Version Colour Finish Assembly Quantity Unit price Extended Price
v1.0 Black Enig Standard T&B 15 $30.8 $462.57
v1.0 Black Enig Standard Top 15 $24.3 $364.22
v1.0 Black HASL Standard Top 10 $24.75 $247.51
v1.0 Black Enig Standard T&B 100 $16.78 $1678.39
v1.0 Green HASL Economic Top 2 $53.45 $106.89
v1.0 Green HASL Economic Top 5 $30.28 $151.40
v1.0 Green HASL Economic Top 10 $20.48 $204.81
v1.0 Green HASL Economic Top 15 $19.2 $288.48
v1.0 Green HASL Economic Top 30 $15.6 $468.48
v1.0 Green HASL Standard Top 100 $12.98 $1297.77
v1.0 Black Enig No ICs Top 10 $15.9 + $159.37
v1.0 Black Enig No ICs Top 15 $12.9 + $193.44

ICs:

15x @LCSC: 215.22 -> 14.33 10x @LCSC: 146.71 -> 14.6