TRINAMIC 公司的TMC389是三相步進馬達驅動器,集成了低諧振的三相斬波器用于靜態馬達工作,能直接驅動三個外接N/P溝雙MOSFET,馬達電流高達8A和60V,多達171個微步距,采用基于自動負載調整馬達電流的coolStep™s20,節能高達75%,主要用在精密三相步進馬達驅動,醫療和光學應用,機器人和舞臺照明.本文介紹了TMC389主要特性和優勢,方框圖和應用電路圖,和高壓大電流功率級電路圖以及評估板TMC389–EVAL主要特性,應用框圖,電路圖和PCB元件布局圖.
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產品亮點:
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應用:
Precision three phase stepper motor drives
Stage lighting
Medical applications
Optical applications
Robotics
Motor type
3 phase Stepper
圖1.TMC389基本應用框圖
圖2.TMC389方框圖和應用電路圖
圖2.TMC389采用外接柵極驅動器的高壓大電流功率級電路圖
圖2.TMC429 StepDir控制器和SPI互連的示例圖
TMC389評估板
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評估板亮點:
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)
圖3.TMC389-EVAL評估板外形圖
圖4.TMC389-EVAL評估板應用框圖
圖5.TMC389-EVAL評估板元件布局圖
圖6.TMC389-EVAL評估板電路圖(1)
圖7.TMC389-EVAL評估板電路圖(2)
圖8.TMC389-EVAL評估板電路圖(3)
圖9.TMC389-EVAL評估板電路圖(4) |
