POWER DR I V E R F O R S T E P P E R M O T O R S I N T E G R A T E D C I R C U ITS TMC 2 49 Micr oste p Dr iver f or E xter nal MOSF ETs fo r up to 4A wi th s tall Guar d™ M A IN CH A R AC T ER IS T IC S INFO The TMC249 is a smart high current microstepping driver for • sensorless stall detection StallGuard™ bipolar stepper motors. The integrated unique sensorless stall • full protection and diagnostics detection stallGuard™ makes it a good choice for applications • low power dissipation where a reference point is needed, but where a switch cannot • 16 times microstepping via SPI, 64 times using additional shift register, even more via analog control be used. The ability to predict an overload makes the TMC249 an optimum choice for drives where a high reliability is desired. • mixed decay for smooth operation It provides an SPI™ interface as well as the classical analog/ • programmable slope control for low EME digital control. A full set of protection and diagnostic features • internal or external chopper clock makes this device very rugged. It directly drives external MOSFETs • standby and shutdown mode for currents of up to 4A. (A list of compatible power MOSFETs is given within the datasheet.) This way it reaches an extremely INTERFACE • classical analog interface high efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures. • easy-to-use SPI™ interface ELECTRICAL DATA With the new chip-scale QFN package a 4A motor driver can be • 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 realized on the size of a stamp! • higher current / voltage using additional gate drivers The high motor current makes this device ideal for miniaturized highly dynamic and high torque drive systems. • 3.3V or 5V operation for digital part PACKAGE • standard SO28 package • chip size QFN32 7x7 mm² package • RoHS compliant C/CLK IN A IN B TMC249 OSC 2x 4 bit DACs SPI PWM control & Gate Driver Coil A Control & Diagnostics & Stallguard ERROR 3.3 / 5V DC 7..34V DC Current monitoring PWM control & Gate Driver Temp / Volt protection Step Motor 10 mm Coil B OR DE R C O DE D E S C RI P T I ON TMC249A-SA 4A driver with stallGuard™ for external MOSFETs, SO28 TMC249A-LA 4A driver with stallGuard™ for external MOSFETs, QFN32 Related product: TMC32NP, TMC32NP2, TMC34NP TMC428A-EVAL Evaluation board for TMC428, TMC246A and TMC249A with stallGuard™ www.trinamic.com – for detailed information and datasheets 14