原标题：TRINAMIC TMC389三相步进马达驱动方案

　　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

　　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