Fan driver old 1.3

Jump to bottom Edit New page

Marian Minar edited this page Mar 1, 2023 · 1 revision

Fan Driver Board [I02]

version: 1.3

Description:
- I2C driving FAN
  - Connecting to Raspberry Pi by mini_hub board (long range I2C connector)
  - Power supply for fan:
    - from Raspberry pi (step up voltage convertor) and set internal VPP (iVPP) by trimmer from 5 - 24V (max 1A slow fuse)
      - measure voltage at probe J7 or between GND & VPP test pins at the PCB
    - external Power supply connected to Port X2. Pushing connector into X2 will set off internal step-up convertor
  - FAN connects into connector J4, it is designed to 4 pin FAN with tachometer
  - 2 probes for measure current:
    - J5 current of FAN load
    - J6 internal step-up converter current (before Schottky Barrier Rectifier Diode)
  - main chip dedicated for fan management emc2301 could lock content of register. Pushing reset button will unlock the locked registers
  - two I2C buses could be connected to the board at Ports J1 & J2
- I2C communication ports:
  - Port J1,J2: short range port for short cable (tested 20 cm)
  - Port J3: wide range I2C port for long cable (tested 2 m)
- FAN port J4:
  - Board is designed for 4 pin FAN managed by PWM and with tachometer (sensor)
- Measure current at probe:
  - switch of two micro switches when you want to measure current
  - micro switches are on (default status)
- Alert pin of EMC2301 chip at the board (also ALERT LED diode)
- At the bottom side of board could be added I2C eeprom chip from 24c01 - 24c1024 for internal use
- I2C line are voltage protected
- Electromagnetic compatible (EMC)

fan_driver v1.3