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specification.md

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CLN17-V1.5 Specification

⚡ Electrical characteristics

  • Input voltage: 5-25VDC with overcurrent protection, reverse polarity protection and surge protection
  • Current requirements: 2ARMS with up to 3A peak current
  • Powering options:
    • 2-Pin connector XH2.5 (3A limited by connector);
  • System voltage source:
    • On-board DC-DC converter
    • USB Type-C connector (5VDC 1.5A limited by design)
    • CTRL connector (5VDC 1A limited by design)

🔄 Motor Driving Control Capabilities

  • Supported stepper motor form factor: NEMA17
  • Maximum coil current (bipolar configuration only):
    • 1.4ARMS per phase continuously
    • 2ARMS per phase with 50% duty cycle (period 1s)
    • 2.5A peak per phase
  • Maximum output voltage: 25VDC
  • Maximum step sub-division resolution: 1/256 of full step
  • Energy saving features: Passive Braking, Freewheeling and automatic power down
  • Working frequency: up to 40kHz PWM
  • Phase channel resistance: Mosfets RDSON 170mΩ for both sides + 100mΩ current sensing resistor
  • True Driver positioning resolution: Up to 0.028° (may be limited by motor)
  • True Encoder position feedback resolution: 14bit per full rotation or 0.02° at 20kHz update rate
  • Diagnostic functions: overheat detection, short-circuit detection, under-voltage detection, open-load detection in case connectors are not firmly plugged in

🖥️ MCU Performance and External interfaces

MCU: High-performance Arm Cortex-M4 MCU STM32G431CB running at 170MHz with:

  • 128KB Flash memory and 32KB SRAM memory and 1Kb OTP
  • Math accelerator with trigonometric functions calculations support;
  • True random number generator
  • Internal HSI and RTC with external oscillator option

Interfaces:

  • USB2.0 for PC communication
  • CAN-Bus with CAN-FD support for high-speed or long-range wired connection with daisy chain connection option
  • SWD programming interface with debug over SWO trace
  • 5-Pin CTRL connector PH2.0 with multifunctional bidirectional fast 4-Pin interface up to 8MHz with support:

    • Classic EN/DIR/STEP interface with ERR line

    • USART (Single wire, Asynchronous, Synchronous)

    • I2C

    • SPI or SSI

    • ABZ incremental interface for external encoder connection with program-controlled 5V voltage source

    • Custom interface including numerous combination of the above interfaces

  • 4-Pin expansion connector 2x2P2.0 with 2A power line and multifunctional bidirectional fast 2-Pin interface up to 8MHz with Classic UART interface

I/O protection features:

  • ESD protection (persistent against electrostatic discharge)
  • USB, SWD and control interfaces are 5V-tollerant
  • Reverse polarity signal protection
  • Overcurrent protection

User interaction:

  • 2 programmable custom user buttons (one can be used as reset button)
  • RGB LED for indication of working mode or current status

📏 Mechanical data

  • Size dimensions: PCB outline is 40x40mm (adapted for NEMA17 form factor) 7.5-12mm total height (depends on the connectors type)
  • Driver housing: 42x42mm CNC-milled alluminum case for PCB mounting, heatsink and mechanical protection with
  • Weight:
    • 8g board only
    • 18g board with mount
    • 24g with low-profile aluminum housing
    • 28g with full-size aluminum housing

🔥 Operating conditions

  • Working temperature range: -25 to +80 degrees Celcius
  • Environment humidity range: 0 to 90%
  • Environmental safety: potential Lead-Free and RoHS compliance
  • Maximum heat dissipation: 3W from motor driver and 0.5W from other system