Analog Devices Inc./Maxim Integrated TMC223-LI

Overview

TMC223-LI from TRINAMIC Motion Control is a micro-stepping stepper motor controller/driver IC with integrated sensorless stall detection, two-wire serial interface, and autonomous ramp generation. It delivers up to 800 mA coil current across 8–29 V supply, supports 1/2 to 1/16 micro-stepping, and operates from –40°C to +125°C in QFN32 packaging - used in precision motion control for medical pumps, lab automation, and compact industrial actuators.

For engineers reviewing the TMC223-LI datasheet, TMC223-LI pinout, TMC223-LI application, or TMC223-LI equivalent, key selection criteria include its 32-pin QFN package, 350 kbps two-wire serial interface, programmable Irun/Ihold, built-in 16-bit position counter, and stall detection without external sensors - all critical for embedded motion systems requiring low EMI, thermal robustness, and minimal host MCU overhead.

Technical Context

The TMC223-LI integrates a dual H-bridge driver with fixed-frequency PWM current control (23 kHz or 46 kHz), automatic fast/slow decay mode selection, and internal charge pump (VCP/CPN/CPP) for high-side gate drive. Its position controller executes autonomous trapezoidal velocity ramps using programmable Vmax (up to 973 FS/s), Vmin (1/32–15/32 of Vmax), and acceleration (up to 40,047 FS/s²).

Communication occurs over a two-wire serial bus supporting up to 32 nodes with field-programmable addresses via HW pin or OTP memory. Stall detection is implemented via real-time back-EMF monitoring, exposed through GetFullStatus1/2 and configurable via SetStallParam - enabling silent reference search and blockage detection without mechanical switches.

Key Specifications

Pinout & Package

Package: QFN32 (5 mm × 5 mm, 0.5 mm pitch), thermally enhanced with exposed pad (GND-connected). RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stepper motor controller/driver applications.

Compared with TMC223-LI, the TMC2209-LA offers higher drive capability but replaces the two-wire interface with UART and lacks OTP-configurable node addressing; the TMC5160-TA adds encoder support and SPI but increases system cost and design effort - making TMC223-LI optimal for cost-sensitive, space-constrained, single-axis applications requiring autonomous stall-aware motion.

Availability

TMC223-LI is available at Aetrix Electronics and suitable for medical infusion pumps, lab automation robotics, and industrial valve actuators requiring stable component supply, long-term lifecycle support, and automotive-grade temperature resilience (–40°C to +125°C).

Supply support for TMC223-LI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in intelligent motor control ICs, known for high-precision, low-noise, and energy-efficient motion solutions.

The TMC223 product line delivers integrated stepper controller/driver functionality targeting compact, autonomous motion systems - designed to reduce host MCU burden while enabling sensorless stall detection and robust diagnostics in harsh environments.

FAQ

What is the maximum microstepping resolution supported by the TMC223-LI?

The TMC223-LI supports up to 1/16 microstepping, delivering 65,536 microsteps per revolution in full-step equivalent. This resolution is selected via internal register configuration and enables smooth, low-vibration motion ideal for precision positioning applications such as medical devices and optical alignment systems. The TMC223-LI maintains this resolution across its full operating temperature range (–40°C to +125°C) without calibration drift.

Does the TMC223-LI require external MOSFETs or is it a fully integrated driver?

The TMC223-LI is a fully integrated stepper motor driver with on-chip dual H-bridges - no external power transistors are needed. It drives bipolar stepper motors directly with up to 800 mA per coil at 8–29 V supply. External components include only passive elements: charge pump capacitors (CPP, CPN, VCP), decoupling capacitors (VBAT, VDD), and optional RC filtering on SWI. The TMC223-LI integrates gate drivers, current regulation, protection circuitry, and motion control logic in a single QFN32 package.

How does sensorless stall detection work in the TMC223-LI, and what commands configure it?

Sensorless stall detection in the TMC223-LI analyzes back-EMF and current dynamics during motor rotation to detect loss of synchronization without external sensors. Configuration is performed using the SetStallParam command, which sets sensitivity thresholds and filter parameters. Status is read via GetFullStatus1 (stall flag bit) and GetFullStatus2 (detailed stall metrics). The TMC223-LI uses this capability for silent reference search and real-time blockage monitoring - critical in applications like infusion pump occlusion detection where mechanical switches are impractical.

Can the TMC223-LI operate standalone without a host microcontroller?

The TMC223-LI cannot operate fully standalone - it requires a host microcontroller to initialize parameters (motor current, microstep mode, ramp settings) and issue motion commands (e.g., SetPosition, RunInit) via its two-wire serial interface. However, once configured, it executes motion autonomously: the on-chip ramp generator handles acceleration, constant velocity, and deceleration without further host involvement. The TMC223-LI retains position state and responds to real-time events (e.g., stall, switch closure) via status flags accessible over the same interface.

What thermal management features does the TMC223-LI provide, and how are they reported?

The TMC223-LI includes integrated thermal shutdown that disables motor outputs when junction temperature exceeds the safe threshold (~150°C), with automatic recovery upon cooling. Thermal status is reported via the flag in GetFullStatus1. Additional protections include over-current, open-load, short-circuit, and under-voltage detection - all communicated through dedicated status bits. These diagnostics allow the host system to log faults, trigger alerts, or initiate graceful shutdown sequences. The TMC223-LI's QFN32 package with exposed thermal pad must be soldered to a solid PCB ground plane to ensure effective heat dissipation under continuous 800 mA operation.