Product Overview
The TMC2209-LA is an ultra-silent stepper motor driver IC from ADI Trinamic, designed for two-phase bipolar stepper motors up to 2A RMS / 2.8A peak current. Featuring the proprietary StealthChop2™ chopper algorithm for noiseless motor operation, this driver delivers industry-leading motion smoothness and energy efficiency. It integrates StallGuard4™ for sensorless stall detection and CoolStep™ for load-adaptive current control, reducing power consumption by up to 75%. With a simple STEP/DIR interface and optional single-wire UART for advanced configuration, the TMC2209-LA is housed in a compact 5x5mm QFN-28 package with an exposed thermal pad for efficient heat dissipation.
Key Specifications
| Parameter | Value |
| Manufacturer | ADI / Trinamic |
| Motor Type | 2-Phase Bipolar Stepper |
| Motor Voltage | 4.75V to 29V DC |
| Output Current | 2A RMS / 2.8A peak per coil |
| Microstep Resolution | 1 to 256 microsteps (via MicroPlyer) |
| Control Interface | STEP/DIR + Single-Wire UART |
| RDS(on) (typ) | 170mΩ HS + LS @ 25°C |
| Chopper Modes | StealthChop2, SpreadCycle |
| Stall Detection | StallGuard4 (sensorless) |
| CoolStep | Load-adaptive current control |
| Package | QFN-28, 5x5mm with exposed pad |
| Operating Temperature | -40°C to +125°C (TJ) |
Features
- StealthChop2™ — noiseless operation with maximum efficiency and torque
- SpreadCycle™ — high-dynamic cycle-by-cycle current control
- MicroPlyer™ — 256 microstep interpolation from lower resolution inputs
- StallGuard4™ — sensorless load and stall detection for StealthChop
- CoolStep™ — energy savings up to 75% via load-adaptive current
- Low RDS(on) integrated power MOSFETs for low heat dissipation
- Internal sense resistor option — no external sense resistors required
- Single-wire UART interface with auto-baud and CRC
- Passive braking, freewheeling, and automatic power-down modes
- Full protection: short circuit, overtemperature, undervoltage, open load
- OTP memory for storing configuration parameters
- Integrated pulse generator for stand-alone velocity mode
Applications
- 3D printers and additive manufacturing
- CNC machines and robotics
- Textile and sewing machines
- CCTV, security cameras and pan-tilt systems
- ATM and cash recycling equipment
- Office automation and POS printers
- HVAC and building automation
- Battery-operated equipment