TRINAMIC motor driver IC cuts power dissipation for 4A stepper motors

July 09, 2013

Toni_McConnel-July 09, 2013

TRINAMIC Motion Control has expanded the company’s existing product line of micro-stepping motor drives with a new IC that supports motor drive currents up to 4A. The new TMC2660 integrates both a pre-driver for real-time calculation of motor coil current values, and power MOSFETS for amplification of coil outputs to directly drive an external motor.


Packaged in a single multi-chip module, the integrated driver/amplifier achieves the lowest power dissipation currently available for a 4A stepper motor driver. With an Rds(on) of 65m, the TMC2660 dissipates just 2.8W at 4A, an 85% reduction compared with the most competitive solution previously available. The new device’s minimal power dissipation eliminates the need for a heat sink, enabling highly dense board designs and reduced component count and cost.

With a peak output current rating of 4A, the TMC2660 can drive motors as large as NEMA 23. The new device is both pin- and software-compatible with TRINAMIC’s popular TMC260/261 devices, which support motors up to NEMA 17.

The TMC2660 is sampling in August 2013, and production volumes will be offered in Q4 2013. The device is available in a 44-pin PQFP package, priced at USD 2.90 in 1,000 unit volumes. To support rapid product development and prototyping, TRINAMIC offers a complete TMC2660 design kit with evaluation board, as well as an Arduino daughter card (shield).

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