TMC248-LA datasheet(3/40 Pages) TRINAMIC

Part #	TMC248-LA

Description	Low-cost stepper driver

Download	40 Pages

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Manufacturer	TRINAMIC [TRINAMIC Motion Control GmbH & Co. KG.]

Direct Link	http://www.trinamic.com

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TMC248 DATASHEET (Rev. 1.01 / 2013-MAR-26)

3

www.trinamic.com

TABLE OF CONTENTS

1

KEY CONCEPTS

4

1.1

ADVANCED FEATURES

5

1.2

CONTROL INTERFACES

5

2

PIN ASSIGNMENTS

6

2.1

PACKAGE OUTLINE

6

2.2

SIGNAL DESCRIPTIONS

6

3

STALLGUARD - STALL DETECTION

AND REFERENCE SEARCH

7

3.1

STALL

GUARD MEASUREMENT

7

3.2

IMPLEMENTING SENSORLESS STALL DETECTION

9

4

SPI INTERFACE

10

4.1

BUS SIGNALS

10

4.2

MOTOR COIL CURRENT SETTING VIA SPI 11

4.3

BASE CURRENT CONTROL MODE VIA INA /

INB IN SPI MODE

11

4.4

CONTROLLING POWER DOWN VIA THE SPI

INTERFACE

13

4.5

OPEN LOAD DETECTION

13

4.6

STANDBY AND SHUTDOWN MODE

13

4.7

POWER SAVING

13

4.8

BUS TIMING

14

4.9

USING THE SPI INTERFACE WITH ONE OR

MULTIPLE DEVICES

14

4.10

SPI FILTER

14

5

CLASSICAL NON-SPI CONTROL MODE

(STANDALONE MODE)

15

5.1

PIN FUNCTIONS IN STANDALONE MODE

15

5.2

INPUT SIGNALS FOR MICROSTEP CONTROL IN

STANDALONE MODE

15

6

CURRENT SETTING

16

6.1

SENSE RESISTOR FOR CURRENT SETTING

16

6.2

RESISTOR R

SH FOR HIGH SIDE OVERCURRENT

DETECTION

16

7

CHOPPER OPERATION

18

7.1

MIXED DECAY MODE

18

7.2

CHOPPER FREQUENCY

19

7.3

VOLTAGE PWM MODE FOR LOW NOISE

CHOPPER

20

7.4

ADAPTING THE SINE WAVE FOR SMOOTH

MOTOR OPERATION

22

7.5

BLANK TIME

23

8

SLOPE CONTROL

24

9

PROTECTION FUNCTIONS

25

9.1

OVERCURRENT PROTECTION AND DIAGNOSTIC

25

9.2

OVER TEMPERATURE PROTECTION AND

DIAGNOSTIC

25

9.3

OVERVOLTAGE PROTECTION AND ENN PIN

BEHAVIOR

26

10

MICROSTEP RESOLUTION

27

11

MOSFET EXAMPLES

28

12

LAYOUT CONSIDERATIONS

30

12.1

GROUNDING

30

12.2

FILTERING CAPACITORS

30

12.3

PULL-UP RESISTORS ON UNUSED INPUTS

31

12.4

POWER SUPPLY SEQUENCING

CONSIDERATIONS

31

12.5

LAYOUT EXAMPLE

32

13

ABSOLUTE MAXIMUM RATINGS

33

14

ELECTRICAL CHARACTERISTICS

34

14.1

OPERATIONAL RANGE

34

14.2

DC SPECIFICATIONS

34

14.3

AC SPECIFICATIONS

36

14.4

THERMAL PROTECTION

36

15

PACKAGE MECHANICAL DATA

37

15.1

DIMENSIONAL DRAWINGS

37

15.2

PACKAGE CODE

37

16

DISCLAIMER

38

17

ESD SENSITIVE DEVICE

38

18

TABLE OF FIGURES

39

19

REVISION HISTORY

40

20

REFERENCES

40

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TMC248-LA Datasheet(PDF) 3 Page - TRINAMIC Motion Control GmbH & Co. KG.

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