TMC236 Datasheet, PDF (2/25 Pages) List of Unclassifed Manufacturers – High Current Microstep Stepper Motor Driver with protection / diagnosis and SPI Interface

TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006)
2
FEATURES ............................................................................................................................................1
PINNING.................................................................................................................................................5
PACKAGE CODES...................................................................................................................................5
PQFP44 DIMENSIONS ..........................................................................................................................6
APPLICATION CIRCUIT / BLOCK DIAGRAM .....................................................................................7
PIN FUNCTIONS.....................................................................................................................................7
LAYOUT CONSIDERATIONS ...............................................................................................................8
CONTROL VIA THE SPI INTERFACE ..................................................................................................9
SERIAL DATA WORD TRANSMITTED TO TMC236 ......................................................................................9
SERIAL DATA WORD TRANSMITTED FROM TMC236..................................................................................9
TYPICAL WINDING CURRENT VALUES .....................................................................................................10
BASE CURRENT CONTROL VIA INA AND INB IN SPI MODE......................................................................10
CONTROLLING THE POWER DOWN MODE VIA THE SPI INTERFACE ...........................................................10
OPEN LOAD DETECTION .......................................................................................................................11
STANDBY AND SHUTDOWN MODE ..........................................................................................................11
POWER SAVING ...................................................................................................................................11
PROTECTION FUNCTIONS................................................................................................................12
OVERCURRENT PROTECTION AND DIAGNOSIS........................................................................................12
OVERTEMPERATURE PROTECTION AND DIAGNOSIS ................................................................................12
OVERVOLTAGE PROTECTION AND ENN PIN BEHAVIOR ...........................................................................12
CHOPPER PRINCIPLE........................................................................................................................13
CHOPPER CYCLE / USING THE MIXED DECAY FEATURE...........................................................................13
BLANK TIME ........................................................................................................................................13
BLANK TIME SETTINGS .........................................................................................................................13
CLASSICAL NON-SPI CONTROL MODE (STAND ALONE MODE) ................................................14
PIN FUNCTIONS IN STAND ALONE MODE.................................................................................................14
INPUT SIGNALS FOR MICROSTEP CONTROL IN STAND ALONE MODE..........................................................14
CALCULATION OF THE EXTERNAL COMPONENTS......................................................................15
SENSE RESISTOR................................................................................................................................15
EXAMPLES FOR SENSE RESISTOR SETTINGS..........................................................................................15
HIGH SIDE OVERCURRENT DETECTION RESISTOR R_SH ............................................................................15
MAKING THE CIRCUIT SHORT CIRCUIT PROOF.........................................................................................16
OSCILLATOR CAPACITOR .....................................................................................................................17
TABLE OF OSCILLATOR FREQUENCIES ...................................................................................................17
PULL-UP RESISTORS ON UNUSED INPUTS ..............................................................................................17
SLOPE CONTROL RESISTOR ................................................................................................................18
EXAMPLE FOR SLOPE SETTINGS ...........................................................................................................18
ABSOLUTE MAXIMUM RATINGS......................................................................................................19
ELECTRICAL CHARACTERISTICS ...................................................................................................19
OPERATIONAL RANGE .........................................................................................................................19
DC CHARACTERISTICS ........................................................................................................................20
AC CHARACTERISTICS ........................................................................................................................21
THERMAL PROTECTION (1) ..................................................................................................................21
THERMAL CHARACTERISTICS ...............................................................................................................22
TYPICAL POWER DISSIPATION AT HIGH LOAD / HIGH TEMPERATURE ........................................................22
SPI INTERFACE TIMING.....................................................................................................................23
PROPAGATION TIMES ..........................................................................................................................23
USING THE SPI INTERFACE ..................................................................................................................23
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