TMC389

TMC389


Smart 3-phase Stepper Motor Gate-Driver with SPI and Step/Direction for external MOSFETs

The TMC389 is the first energy efficient high current high precision microstepping driver IC for 3-phase bipolar stepper motors. Using low resonance 3-phase stepper motors the smoothness at low speed can be increased significantly compared to a 2-phase stepper motor solution. The unique high resolution sensorless load detection stallGuard2™ is used to for the world’s first integrated load dependent current control feature coolStep™. The ability to read out the load and detect an overload makes the TMC389 an optimum choice for drives where a high reliability is desired at a low cost. The new for 3-phase motors adapted spreadCycle 3 PWM automatic mixed decay chopper scheme ensures highest smoothness and best zero crossing performance.

The TMC389 can be driven with Step & Direction signals as well as by serial SPI™ interface. Using the microPlyer x16 allows to operate the motor with highest ?Step smoothness reducing the input frequency divided by 16. A full set of protection and diagnostic features makes this device very rugged. It directly drives external MOSFETs for currents of up to 6A. This way it reaches highest energy efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures...

Technical Data:

Motor Type:

Stepper, 3-phase, bipolar

No. Axes:

1

Motor Supply:

9...60V

Logic Supply:

3,3...5V

Phase Current, RMS:

ext. MOSFETs

Phase Current, peak:

ext. MOSFETs

Microstep Resolution:

1…171

Interfaces:

SPI, Step/Direction

stallGuard2™

X

coolStep™

X

spreadCycle™ Chopper

X

microPlyer™ (interpolation)

16 to 256

stealthChop™ (no noise)

no

dcStep™

no

passive breaking

no

RDSon current sensing

no

Programmable microstep table

no

Package:

QFN32 5x5mm

Order code:

TMC389-LA

Downloads:

TMC389 datasheet (PDF)

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