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 46 Micr oste p Dr iver for up to 1.5A wi th s tall Guar d™ M A IN CH A R AC T ER IS T IC S INFO The TMC246 is a smart power microstepping driver for bipolar • sensorless stall detection StallGuard™ stepper motors. The integrated unique sensorless stall detec- • full protection and diagnostics tion stallGuard™ makes it a good choice for applications where • low power dissipation a reference point is needed, but where a switch cannot be • 16 times microstepping via SPI, 64 times using additional shift register, even more via analog control used. The ability to predict an overload makes the TMC246 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. The integrated low-RDS-ON • standby and shutdown mode TrenchFET® power MOSFETs give an extremely high efficiency INTERFACE and allow driving of a high motor current of up to 1.5A per • classical analog interface phase without cooling measures even at high environment ELECTRICAL DATA temperatures. • 3.3V or 5V operation for digital part fect solution for embedded motion control and even for battery PACKAGE powered designs. IN A IN B • up to 1500 mA coil current (peak) • 7V to 34V motor supply (TMC246A) The small footprint and high efficiency make the device a per- C/CLK • easy-to-use SPI™ interface • standard PQFP-44 package • RoHS compliant TMC246 OSC 2x 4 bit DACs SPI PWM control & Gate Driver Control & Diagnostics & Stallguard ERROR 3.3 / 5V DC 7..34V DC internal Driver Stage Coil A 10 mm Current monitoring PWM control & Gate Driver Temp / Volt protection Coil B Step Motor internal Driver Stage OR DE R C O DE D E S C RI P T I ON TMC246A-PA 1.5A driver with stallGuard™, PQFP-44 TMC428A-EVAL Evaluation board for TMC428, TMC246A and TMC249A with stallGuard™ www.trinamic.com – for detailed information and datasheets 12