The TMC2225 V1.1 is an ultra-silent, high-precision stepper motor driver module developed by Trinamic. Designed as an enhanced, cost-effective derivative of the popular TMC2208/TMC2209 series, it replaces noisy legacy drivers (like the A4988 or DRV8825) on 3D printer mainboards, CNC routers, and robotics setups. Encased in an HTSSOP package for improved thermal dissipation, it utilizes Trinamic's proprietary StealthChop2™ technology to render stepper motor operation virtually silent during slow and medium-velocity moves.

Specification

• Driver Chip IC: Trinamic TMC2225-SA
• Package Profile: HTSSOP-28 (Larger thermal pad footprint compared to QFN packages)
• Maximum Motor Voltage (VMOT): DC 4.75V to 36V
• Logic Voltage Range (VIO): DC 3.0V to 5.0V (Fully compatible with 3.3V and 5.0V microcontrollers)
• Continuous Current Output:1.2A RMS per phase
• Peak Output Current: Up to 2.0A phase current (Requires active fan cooling)
• Microstepping Interpolation: Native hardware microstepping up to 1/16 or 1/32, interpolated to 1/256 via the internal MicroPlyer™ engine
• Control Interfaces:
  • Standard STEP / DIR parallel interface
  • Half-Duplex Single-Wire UART interface for software parameter configuration
• Form Factor Pinout: Standard Pololu StepStick footprint (15.2mm x 20.3mm)
• Mainboard Compatibility: RepRap RAMPS 1.4/1.5/1.6, MKS Gen L, SKR V1.3/V1.4, Creality silent mainboards, and other standard 8-bit or 32-bit StepStick socket boards

Features

• StealthChop2™ Silent Drive: Utilizes voltage-PWM chop control to eliminate low-speed motor humming and resonance, making motion silent at speeds under 300 RPM.
• SpreadCycle™ Dynamic Chopping: Automatically switches to cycle-by-cycle current control during high-acceleration or high-velocity moves to prevent skipped steps and maintain maximum motor torque.
• MicroPlyer™ 1/256 Microstep Interpolation: Even when driven by an 8-bit microcontroller supplying standard 1/16 microstep pulses, the onboard engine smoothly interpolates input steps into 1/256 microsteps for ultra-smooth rotational positioning.
• Single-Wire UART Configuration: Connecting the driver’s UART pin to your 3D printer controller allows you to adjust phase currents, microstep resolutions, and chopper modes directly in firmware (e.g., Marlin or Klipper) without adjusting hardware potentiometers.
• Enhanced HTSSOP Thermal Pad: The TMC2225 uses an HTSSOP casing rather than a small QFN chip, resulting in a larger physical contact patch with the PCB for superior heat transfer to the aluminum heatsink.

Professional Installation & Tuning Tips

• CRITICAL: Verify Pin Orientation Before Plugging In:Never insert or remove this driver module while power is applied to the mainboard. Furthermore, pay close attention to pin labels (DIR,STEP,GND,VM). Installing the driver upside down will instantly burn out both the driver IC and your controller board.
• Setting the Reference Voltage (VREF): When operating in standard STEP/DIR mode without UART, set the phase current accurately using a multimeter. Measure DC voltage between the potentiometer metal wiper screw (Positive Probe) and System Power Ground (Negative Probe):

  VREF = Target Current (A RMS) x 1.414

• Provide Active Cooling Fans: Even with the improved HTSSOP package, running current levels above 0.8A - 1.0A without forced airflow will cause thermal throttling, leading to missing steps mid-print. Always mount the included adhesive aluminum heatsink on top of the IC pad and direct a 40mm cooling fan over the driver bank.
• Disable Motor Reverse Pins in Firmware if Replacing A4988s: The pinout direction logic of TMC drivers can be inverted relative to legacy Allegro A4988 modules. If your motor moves backward after replacing an A4988, flip the motor wiring plug 180°C or change INVERT_X_DIR from true to false (or vice versa) in your Marlin/Klipper configuration files