TMC2240 – MEV Elektronik GmbH
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Smart Stepper Motor Driver with SPI, UART and Step/Direction (2,1A/36V)

The TMC2240 is a smart high-performance stepper motor driver IC with serial communication interface (SPI) and extensive diagnosis capabilities. It combines industries’ most advanced stepper motor driver based on the 256-usteps built-in indexer and two fully integrated 36V, 3.0A (max) H-Bridges plus non-dissipative Integrated Current Sensing (ICS).
ADI-Trinamic’s StealthChop2 chopper ensures absolutely noiseless operation combined with maximum efficiency and best motor torque.
High integration, high energy efficiency, and a small form factor enable miniaturized and scalable systems for costeffective solutions while giving best in class performance. The H-Bridge FETs have very low impedance resulting in high driving efficiency and minimal heat generated. The typical total R ON (high side + low side) is 0.23 Ω. The maximum output current per H-Bridge is I MAX = 5.0 A limited by the Overcurrent Protection (OCP).
The maximum RMS current per H-Bridge is I RMS = 2.1 A at room temperature assuming a 4-layers PCB.
The maximum full-scale current per H-Bridge is IFS = 3.0 A and can be set by an external resistor connected to IREF.
This current is defined as the maximum current setting of the embedded current drive regulation circuit. The nondissipative ICS eliminates the bulky external power resistors resulting in a dramatic space and power saving compared with mainstream applications based on external sense resistor.

The TMC2240 features abundant diagnostics and protections such as short protection/OCP, thermal shutdown, undervoltage lockout (UVLO). During thermal shutdown and UVLO events, the driver is disabled.
Furthermore, the TMC2240 provides functions to measure the driver temperature, estimate the motor temperature, and measure one external analog input.

For evaluation following boards are available:  TMC2240-EVALTMC2240-EVAL-KIT and TMC2240-BOB

Technical Data

Order Code: TMC2240ATJ+ TMC2240AUU+
Motor Type: Stepper, 2-phase, bipolar
No. Axes: 1
Motor Supply: 4,5…36V
Logic Supply: 2,2…5V
Phase Current, RMS: 2,1A
Phase Current, peak: 3,0A
Microstep Resolution: 1…256
Interfaces: SPI, UART
Encoder Interface: ABN quadrature
StallGuard™ StallGuard2™ with SpreadCycle™
StallGuard4™ with StealthChop2™™
CoolStep™ X
SpreadCycle™ Chopper X
MicroPlyer™ (interpolation) 1…128 to 256
StealthChop™ (no noise) StealthChop2™
DcStep™ X
Passive Breaking X
RDSon Current Sensing ICS
Analog Temp. Sensor Input X
Programmable Microstep Table X
Package: TQFN32 5x5mm TSSOP38 9,7×4,4mm


TMC2240 datasheet (PDF)

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