Microstep Driver for External MOSFETs for up to 4A with stallGuard™

   The TMC249 is a smart high current microstepping driver for bipolar stepper motors. The integrated unique sensorless stall detection stallGuard™ makes it a good choice for applications where a reference point is needed, but where a switch cannot be used. The ability to predict an overload makes the TMC249 an optimum choice for drives where a high reliability is desired.

MAIN CHAR ACTERISTICS
• sensorless stall detection StallGuard™
• full protection and diagnostics
• low power dissipation
• 16 times microstepping via SPI,
   64 times using additional shift register,
   even more via analog control
• mixed decay for smooth operation
• programmable slope control for low EME
• internal or external chopper clock
• standby and shutdown mode
• easy-to-use SPI™ interface
• classical analog interface
• up to 4000 mA coil current (peak) with
   just 4 external dual MOSFETS
• 7V to 34V motor supply (TMC249A),
   up to 60V using a few add. components
• higher current / voltage
   using additional gate drivers
• 3.3V or 5V operation for digital part
• standard SO28 package
• chip size QFN32 7x7 mm² package
• RoHS compliant