Trinamic Integrated Circuits - PDF Catalogues

TMC262 coolStep

Description

Energy efficient microstep driver for external MOSFET's for up to 6A with coolStep™

The TMC262 is the first energy efficient high current high precision microstepping driver IC for bipolar stepper motors. The unique high resolution sensorless load detection stallGuard2™ is used to for the world’s first integrated load dependent current control feature called coolStep™. The ability to read out the load and detect an overload makes the TMC262 an optimum choice for drives where a high reliability is desired at a low cost. The new patented spreadCycle PWM mixed decay chopper scheme ensures best zero crossing performance as well as high speed operation. The TMC262 can be driven with Step & Direction signals as well as by serial SPI™ interface. Using the microPlyer allows to operate the motor with highest 256 μStep smoothness reducing the input frequency to 16 μSteps. A full set of protection and diagnostic features makes this device very rugged. It directly drives external MOSFETs for currents of up to 6A. This way it reaches highest energy efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures.

Specifications

Main characteristics

• 2-phase bipolar stepper motor driver
• stallGuard2™ sensorless load detection
• coolStep™ load dependent current control
• save up to 80% energy
• spreadCycle hysteresis PWM chopper
• best current zero crossing performance
• best sine wave form
• 256 μSteps/fullstep (51200 pos/rev.) with a standard 200 step motor
• microPlyer 16-to-256 μStep multiplyer
• full protection and diagnostics
• lowest power dissipation
• programmable slope control for low EME
• standby and shutdown mode stall / load detection output
• Low power consumption via low RDS-ON power stage

Interface

• Step & Direction
• easy-to-use SPI™ (20bit)

Electrical Data

• up to 6A coil current (peak) with just 4 external dual MOSFETS
• 9V to 60V motor supply
• full 48V +10% industry voltage support
• 3.3V or 5V operation for digital part
  

Package

• QFN32 5x5 mm² chip size package
• RoHS compliant

Order Code Description

• TMC262-ES engineering samples (up to 40V)
• TMC262-LA tray with 490 pcs. (available from AUG-2010)
• TMC262-LA-X single pack, X-tra pack, 1 pc. (available from AUG-2010)
• TMC262-EVAL Evaluation board with TMC262 with RS232, USB