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 called 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 3p 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 μStep 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.
Specifications
Main characteristics
3-phase bipolar stepper motor driver
stallGuard2™ sensorless load detection
coolStep™ load dependent current control
save up to 80% energy
spreadCycle 3p PWM automatic mixed decay chopper
highest smoothness
best current zero crossing performance
best sine wave form
171 μSteps/fullstep (51200 pos/rev.) with a standard 300 step motor (resolution is equivalent to 256µSteps with a 2-phase motor)
microPlyer x16 μStep multiplyer
full protection and diagnostics
lowest power dissipation
programmable slope control for low EME
standby and shutdown mode stall / load detection output
Low power consumption via low RDS-ON power stage
Interface
Step & Direction
easy-to-use SPI™ (20bit)
Electrical Data
up to 6A coil current (peak) with just 3 external dual MOSFETS
9V to 60V motor supply
full 48V +10% industry voltage support
3.3V or 5V operation for digital part
Package
QFN32 5x5 mm² chip size package
RoHS compliant
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 called 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 3p 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 μStep 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.
Specifications
Main characteristics
- 3-phase bipolar stepper motor driver
- stallGuard2™ sensorless load detection
- coolStep™ load dependent current control
- save up to 80% energy
- spreadCycle 3p PWM automatic mixed decay chopper
- highest smoothness
- best current zero crossing performance
- best sine wave form
- 171 μSteps/fullstep (51200 pos/rev.) with a standard 300 step motor (resolution is equivalent to 256µSteps with a 2-phase motor)
- microPlyer x16 μStep multiplyer
- full protection and diagnostics
- lowest power dissipation
- programmable slope control for low EME
- standby and shutdown mode stall / load detection output
- Low power consumption via low RDS-ON power stage
Interface
- Step & Direction
- easy-to-use SPI™ (20bit)
Electrical Data
- up to 6A coil current (peak) with just 3 external dual MOSFETS
- 9V to 60V motor supply
- full 48V +10% industry voltage support
- 3.3V or 5V operation for digital part
Package
- QFN32 5x5 mm² chip size package
- RoHS compliant
