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TMC246/A: 产品描述High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface; 文件大小189KB，共26页; 制造商ETC

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TMC246/A概述

High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface

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TMC246 / TMC246A DATA SHEET (V2.03 / Nov. 6th, 2006)

TMC 246/A – DATA SHEET

High Current Microstep Stepper Motor Driver

with sensorless stall detection, protection /

diagnosis and SPI Interface

TRINAMIC

Motion Control GmbH & Co KG

Sternstraße 67

D – 20357 Hamburg

GERMANY

T +49 - (0) 40 - 51 48 06 - 0

F +49 - (0) 40 - 51 48 06 - 60

WWW.TRINAMIC.COM

INFO@TRINAMIC.COM

Features

The TMC246 / TMC246A (1) is a dual full bridge driver IC for bipolar stepper motor control

applications. The integrated unique sensorless stall detection (pat. pend.) StallGuard™ makes it a

good choice for applications, where a reference point is needed, but where a switch is not desired. Its

ability to predict an overload makes the TMC246 an optimum choice for drives, where a high reliability

is desired. The TMC246 is realized in a HVCMOS technology combined with Low-RDS-ON high

efficiency MOSFETs (pat. pend.). It allows to drive a coil current of up to 1500mA even at high

environment temperatures. Its low current consumption and high efficiency together with the miniature

package make it a perfect solution for embedded motion control and for battery powered devices.

Internal DACs allow microstepping as well as smart current control. The device can be controlled by a

serial interface (SPI™

) or by analog / digital input signals. Short circuit, temperature, undervoltage

and overvoltage protection are integrated.

•

Sensorless stall detection StallGuard™ and load measurement integrated

Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals

Short circuit, overvoltage and overtemperature protection integrated

Status flags for overcurrent, open load, over temperature, temperature pre-warning, undervoltage

Integrated 4 bit DACs allow up to 16 times microstepping via SPI, any resolution via analog

control

Mixed decay feature for smooth motor operation

Slope control user programmable to reduce electromagnetic emissions

Chopper frequency programmable via a single capacitor or external clock

Current control allows cool motor and driver operation

7V to 34V motor supply voltage (A-type)

Up to 1500mA output current and more than 800mA at 105°C

3.3V or 5V operation for digital part

Low power dissipation via low RDS-ON power stage

Standby and shutdown mode available

(1) The term TMC246 in this datasheet always refers to the TMC246A and the TMC246. The major

differences in the older TMC246 are explicitly marked with “non-A-type”. The TMC246A brings a

number of enhancements and is fully backward compatible to the TMC246.

TMC246 / TMC246A DATA SHEET (V2.03 / Nov. 6th, 2006)

FEATURES ............................................................................................................................................1

PINNING.................................................................................................................................................5

ACKAGE CODES

...................................................................................................................................5

PQFP44 D

IMENSIONS

..........................................................................................................................6

APPLICATION CIRCUIT / BLOCK DIAGRAM .....................................................................................7

UNCTIONS

.....................................................................................................................................7

LAYOUT CONSIDERATIONS ...............................................................................................................8

CONTROL VIA THE SPI INTERFACE ..................................................................................................9

ERIAL DATA WORD TRANSMITTED TO

TMC246 ......................................................................................9

ERIAL DATA WORD TRANSMITTED FROM

TMC246..................................................................................9

YPICAL WINDING CURRENT VALUES

.....................................................................................................10

ASE CURRENT CONTROL VIA

INA

AND

INB

SPI

MODE

......................................................................10

ONTROLLING THE POWER DOWN MODE VIA THE

SPI

INTERFACE

...........................................................10

PEN LOAD DETECTION

.......................................................................................................................11

TANDBY AND SHUTDOWN MODE

..........................................................................................................11

OWER SAVING

...................................................................................................................................11

STALL DETECTION ............................................................................................................................12

SING THE SENSORLESS LOAD MEASUREMENT

.....................................................................................12

MPLEMENTING SENSORLESS STALL DETECTION

....................................................................................12

PROTECTION FUNCTIONS................................................................................................................13

VERCURRENT PROTECTION AND DIAGNOSIS

........................................................................................13

VERTEMPERATURE PROTECTION AND DIAGNOSIS

................................................................................13

VERVOLTAGE PROTECTION AND

ENN

PIN BEHAVIOR

...........................................................................13

CHOPPER PRINCIPLE........................................................................................................................14

HOPPER CYCLE

/ U

SING THE MIXED DECAY FEATURE

...........................................................................14

LANK

IME

........................................................................................................................................14

LANK TIME SETTINGS

.........................................................................................................................14

CLASSICAL NON-SPI CONTROL MODE (STAND ALONE MODE) ................................................15

IN FUNCTIONS IN STAND ALONE MODE

.................................................................................................15

NPUT SIGNALS FOR MICROSTEP CONTROL IN STAND ALONE MODE

..........................................................15

CALCULATION OF THE EXTERNAL COMPONENTS......................................................................16

ENSE

ESISTOR

................................................................................................................................16

XAMPLES FOR SENSE RESISTOR SETTINGS

..........................................................................................16

IGH SIDE OVERCURRENT DETECTION RESISTOR

............................................................................16

AKING THE CIRCUIT SHORT CIRCUIT PROOF

.........................................................................................17

SCILLATOR

APACITOR

.....................................................................................................................18

ABLE OF OSCILLATOR FREQUENCIES

...................................................................................................18

ULLUP RESISTORS ON UNUSED INPUTS

...............................................................................................18

LOPE

ONTROL

ESISTOR

................................................................................................................19

XAMPLE FOR SLOPE SETTINGS

...........................................................................................................19

ABSOLUTE MAXIMUM RATINGS......................................................................................................20

ELECTRICAL CHARACTERISTICS ...................................................................................................20

PERATIONAL

ANGE

.........................................................................................................................20

DC C

HARACTERISTICS

........................................................................................................................21

AC C

HARACTERISTICS

........................................................................................................................22

HERMAL

ROTECTION

........................................................................................................................22

HERMAL

HARACTERISTICS

...............................................................................................................23

YPICAL

OWER

ISSIPATION AT HIGH LOAD

HIGH TEMPERATURE

........................................................23

TMC246/A相似产品对比

	TMC246/A	TMC246	TMC246_06	TMC246A
描述	High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface	High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface	High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface	High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface

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