TMC239 / TMC239A DATA SHEET (V2.11 / 2009-Jul-30)

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Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG

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

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

PACKAGE CODES ................................................................................................................................... 5

SO28 DIMENSIONS ................................................................................................................................ 6

QFN32 DIMENSIONS.............................................................................................................................. 6

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

PIN FUNCTIONS...................................................................................................................................... 7

SELECTING POWER TRANSISTORS................................................................................................... 8

LIST OF RECOMMENDED TRANSISTORS .................................................................................................... 8

LAYOUT CONSIDERATIONS ................................................................................................................ 9

USING ADDITIONAL POWER DRIVERS............................................................................................. 10

CONTROL VIA THE SPI INTERFACE ................................................................................................. 11

SERIAL DATA WORD TRANSMITTED TO TMC239..................................................................................... 11

SERIAL DATA WORD TRANSMITTED FROM TMC239 ................................................................................ 11

TYPICAL MOTOR COIL CURRENT VALUES ................................................................................................ 12

BASE CURRENT CONTROL VIA INA AND INB IN SPI MODE ....................................................................... 12

CONTROLLING THE POWER DOWN MODE VIA THE SPI INTERFACE ........................................................... 12

OPEN LOAD DETECTION ........................................................................................................................ 13

STANDBY AND SHUTDOWN MODE .......................................................................................................... 13

POWER SAVING.................................................................................................................................... 13

PROTECTION FUNCTIONS ................................................................................................................. 14

OVERCURRENT PROTECTION AND DIAGNOSIS ........................................................................................ 14

OVER TEMPERATURE PROTECTION AND DIAGNOSIS................................................................................ 14

OVERVOLTAGE PROTECTION AND ENN PIN BEHAVIOR............................................................................ 14

CHOPPER PRINCIPLE......................................................................................................................... 15

CHOPPER CYCLE / USING THE MIXED DECAY FEATURE ........................................................................... 15

ADAPTING THE SINE WAVE FOR SMOOTH MOTOR OPERATION .................................................................. 16

BLANK TIME ......................................................................................................................................... 16

BLANK TIME SETTINGS .......................................................................................................................... 16

CLASSICAL NON-SPI CONTROL MODE (STAND ALONE MODE) .................................................. 17

PIN FUNCTIONS IN STAND ALONE MODE ................................................................................................. 17

INPUT SIGNALS FOR MICROSTEP CONTROL IN STAND ALONE MODE .......................................................... 17

UNIPOLAR OPERATION...................................................................................................................... 18

DIFFERENCES OF SHORT CIRCUIT BEHAVIOR IN UNIPOLAR OPERATION MODE........................................... 18

DIFFERENCES IN CHOPPER CYCLE IN UNIPOLAR OPERATION MODE.......................................................... 18

CALCULATION OF THE EXTERNAL COMPONENTS ....................................................................... 19

SENSE RESISTOR................................................................................................................................. 19

EXAMPLES FOR SENSE RESISTOR SETTINGS .......................................................................................... 19

HIGH SIDE OVERCURRENT DETECTION RESISTOR RSH ............................................................................ 19

MAKING THE CIRCUIT SHORT CIRCUIT PROOF ......................................................................................... 20

OSCILLATOR CAPACITOR...................................................................................................................... 21

TABLE OF OSCILLATOR FREQUENCIES ................................................................................................... 21

PULL-UP RESISTORS ON UNUSED INPUTS............................................................................................... 21

POWER SUPPLY SEQUENCING CONSIDERATIONS .................................................................................... 21

SLOPE CONTROL RESISTOR ................................................................................................................. 22

ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 23