原标题：TRINAMIC TMC262两相步进马达驱动方案

　　TRINAMIC公司的TMC262是两相步进马达驱动器,具有业界一流的特性,包括高分辨率的微步距,无传感器机械负载测量,负载自适应的功率优化,低谐振斩波工作,标准的 PI和STEP/DIR接口简化了通信.TMC262能驱动四个外接N沟和P沟双MOSFET,马达电流高达8A和60V,主要用在缝纫机,工厂自动化, 打印机与扫描仪,办公自动化,医疗设备,液体处理,ATM和POS等.本文介绍了TMC262主要特性和优势,方框图,应用方框图和高压大电流功率级电路图以及评估板TMC262–EVAL主要特性,应用框图,电路图和PCB元件布局图.

　　The TMC262 driver for two-phase stepper motors offers an industry-leading feature set, including high-resolution microstepping, sensorless mechanical load measurement, load-adaptive power optimization, and low-resonance chopper operation. Standard SPI™ and STEP/DIR interfaces simplify communication. The TMC262 drives four external N- and Pchannel dual MOSFETs for motor currents up to 8A and up to 60V. Integrated protection and diagnostic features support robust and reliable operation.

　　High integration, high energy efficiency and small form factor enable miniaturized designs with low external component count for cost-effective and highly competitive solutions.

　　TMC262主要特性和优势:

　　High Current up to 8A Motor current using external (N&P) MOSFETs.

　　Highest Voltage up to 60V DC operating voltage

　　Highest Resolution up to 256 microsteps per full step

　　Smallest Size 5x5mm QFN32 package

　　Low Power Dissipation synchronous rectification

　　EMI-optimized slope & current controlled gate drivers

　　Protection & Diagnostics overcurrent, short to GND, overtemperature & undervoltage

　　stallGuard2™ high precision sensorless motor load detection

　　coolStep™ load dependent current control for energy savings up to 75%

　　microPlyer™ microstep interpolation for increased smoothness with coarse step inputs.

　　spreadCycle™ high-precision chopper for best current sine wave form and zero crossing

　　TMC262应用:

　　Textile, Sewing Machines

　　Factory Automation

　　Printing

　　Lab Automation

　　Liquid Handling

　　Medical

　　Office Automation

　　Printer and Scanner

　　CCTV, Security

　　ATM, Cash recycler

　　POS

　　Pumps and Valves

　　Heliostat Controller

　　CNC Machines

　　图1.TMC262方框图

　　图2.TMC262功能方框图

　　图3.TMC262应用方框图

　　图4.TMC262采用外接栅极驱动器的高压大电流功率级电路图

　　图5.TMC262采用外接栅极驱动器和短路接地保护的大电流功率级电路图

　　评估板TMC262–EVAL

　　Evaluation board for the TMC262 stepper motor driver IC with coolStep

　　评估板TMC262–EVAL主要特性:

　　The TMC262 evaluation board features a TMC262 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 both, using an external source, and using the integrated microcontroller as a step generator.

　　The TMC262-EVAL allows you to explore all functions of the TMC262. 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 TMC262-Eval is a complete "plug and play" solution, additionally only a motor, a PC and a power supply are required!

　　评估板TMC262–EVAL亮点:

　　 Evaluate all features of the TMC262

　　 Use stallGuard2™ with your motor

　　 Use coolStep™ with your motor

　　 Control all parameters from a PC using special software or TMCL-PC

　　 Motor current can be set to up to 1A, 2A or up to 4A (soldering jumper) via on-board sense resistors

　　 Supply voltage up to 40V (MOSFETs can be exchanged against 60V 2A types)

　　 Access all pins of the TMC262

　　Motor type

　　 2 phase Stepper

　　TMC262-EVAL contains

　　TMC262-Evaluation Board

　　USB cable for connection to PC

　　software for Windows (downloadable)

　　documentation, board and circuit description and all datasheets (downloadable)

　　图6.评估板TMC262–EVAL外形图

　　图7.评估板TMC262–EVAL应用框图