TRINAMIC 公司的TMC389是三相步进马达驱动器,集成了低谐振的三相斩波器用于静态马达工作,能直接驱动三个外接N/P沟双MOSFET,马达电流高达8A和60V,多达171个微步距,采用基于自动负载调整马达电流的coolStep™s20,节能高达75%,主要用在精密三相步进马达驱动,医疗和光学应用,机器人和舞台照明.本文介绍了TMC389主要特性和优势,方框图和应用电路图,和高压大电流功率级电路图以及评估板TMC389–EVAL主要特性,应用框图,电路图和PCB元件布局图.
The TMC389 is an energy efficient three phase stepper motor driver for high resolution microstepping applications. It integrates a low resonance three phase chopper for quiet motor operation. Its step and direction interface allows simple use. An SPI™ management interface allows for parameterization and diagnostics. The TMC389 directly drives 3 external N/P channel dual MOSFETs for motor currents up to 8A and up to 60V. Protection and diagnostic features further reduce system cost and increase reliability.

TMC389产品亮点:
 Up to 171 microsteps (256 sine wave steps) using step/direction interface or 20 Bit SPI™interface
 High precision sensorless motor load measurement stallGuard2
 Energy efficiency and coolness by automatic load dependant motor current regulation coolStep™s20 : Save up to 75% of energy!
 Internal microstep extrapolation allows 256 wave step smoothness with low frequency step input
 Dual edge step option allows half step frequency requirement, e.g. for opto-couplers
 Up to 8A Motor current using external N&P channel MOSFET pairs
 Synchronous rectification reduces transistor heating
 9V to 60V operating voltage (peak)
 3.3V or 5V interface
 QFN32 package for extremely small solution with superior thermal performance
 EMV optimized current controlled gate drivers – up to 45mA gate current
 Overcurrent, short to GND and overtemperature protection and diagnostics integrated

TMC389应用:
 Precision three phase stepper motor drives
 Stage lighting
 Medical applications
 Optical applications
 Robotics
Motor type
 3 phase Stepper

图1.TMC389基本应用框图

图2.TMC389方框图和应用电路图

图2.TMC389采用外接栅极驱动器的高压大电流功率级电路图

图2.TMC429 StepDir控制器和SPI互连的示例图

TMC389评估板
The TMC389 evaluation board features a TMC389 with external power MOSFETs plus a microcontroller, which allows interfacing to a PC for visualization and control of all parameters. The motor can be operated via the step and direction interface, using either an external source, or using the integrated microcontroller as a step pulse generator.
The TMC389-EVAL allows you to explore all functions of the TMC389. The evaluation board comes with a PC software which gives you access to every function of the driver. It comes along with a Step&Direction interface, a RS232 and a USB port. The TMC389-Eval is a complete "plug and play" solution, additionally only a motor, a PC and a power supply are required!

TMC389评估板亮点:
 Evaluate all features of the TMC389
 Use stallGuard2™ with your motor
 Use coolStep™ with your motor
 Control all parameters from a PC
 Motor current can be set to up 6A depending on sense resistor selection.
 Supply voltage up to 40V (MOSFETs can be exchanged against 60V 2A types)
 Access all pins of the TMC389

Motor type
 3 phase Stepper
TMC389-EVAL contains
TMC389-Evaluation Board
USB cable for connection to PC
software for Windows (downloadable)
documentation, board and circuit description and all datasheets (downloadable)


图3.TMC389-EVAL评估板外形图

图4.TMC389-EVAL评估板应用框图

图5.TMC389-EVAL评估板元件布局图


图6.TMC389-EVAL评估板电路图(1)

图7.TMC389-EVAL评估板电路图(2)

图8.TMC389-EVAL评估板电路图(3)

图9.TMC389-EVAL评估板电路图(4)