TRINAMIC公司的TMC262是兩相步進(jìn)馬達驅動(dòng)器,具有業(yè)界一流的特性,包括高分辨率的微步距,無(wú)傳感器機械負載測量,負載自適應的功率優(yōu)化,低諧振斬波工作,標準的 PI和STEP/DIR接口簡(jiǎn)化了通信.TMC262能驅動(dòng)四個(gè)外接N溝和P溝雙MOSFET,馬達電流高達8A和60V,主要用在縫紉機,工廠(chǎng)自動(dòng)化,打印機與掃描儀,辦公自動(dòng)化,醫療設備,液體處理,ATM和POS等.本文介紹了TMC262主要特性和優(yōu)勢,方框圖,應用方框圖和高壓大電流功率級電路圖以及評估板TMC262–EVAL主要特性,應用框圖,電路圖和PCB元件布局圖.
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主要特性和優(yōu)勢:
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應用:
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

圖1.TMC262方框圖

圖2.TMC262功能方框圖


圖3.TMC262應用方框圖

圖4.TMC262采用外接柵極驅動(dòng)器的高壓大電流功率級電路圖

圖5.TMC262采用外接柵極驅動(dòng)器和短路接地保護的大電流功率級電路圖

評估板TMC262–EVAL
Evaluation board for the TMC262 stepper motor driver IC with coolStep

評估板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!

評估板TMC262–EVAL亮點(diǎn):
 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)
 Accss 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)


圖6.評估板TMC262–EVAL外形圖

圖7.評估板TMC262–EVAL應用框圖

圖8.評估板TMC262–EVAL電路圖(1)

圖9.評估板TMC262–EVAL電路圖(2)

圖10.評估板TMC262–EVAL電路圖(3)

圖11.評估板TMC262–EVAL電路圖(4)


圖12.評估板TMC262–EVAL PCB元件布局圖