TMC261C
Highly efficient stepper drivers for two-phase motors with state-of-the art features. Compatible upgrade to TMC261.
DESCRIPTION
The TMC261 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 TMC261 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. TMC261 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 stepper motors with up to 2A. This way it reaches highest energy efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures.
FEATURES AND BENEFITS
• Drive Capability : up to 2A motor current
• Highest Voltage : up to 60V DC (TMC261) or 40V DC (TMC260)
• Highest Resolution : up to 256 microsteps per full step
• Compact Size : 10x10mm QFP-44 package
• Low Power Dissipation : low RDSON & sync. rectification
• EMI-optimized : programmable slope, no charge pump
• Protection & Diagnostics : short to GND, overtemperature & undervoltage, overcurrent and short to VS (-C types only)
• StallGuard2™ : high precision sensorless motor load detection
• CoolStep™ : load dependent current control saves up to 75%
• MicroPlyer™ : 256 microstep smoothness with 1/16 step input.
• SpreadCycle™ : high-precision chopper for best current sine wave form and zero crossing
• Improved Silent Motor : operation (-C types only)
• Stand Alone : option (-C types only)
APPLICATIONS
• Textile, Sewing Machines
• Factory Automation
• Lab Automation
• Liquid Handling
• Medical
• Office Automation
• Printer and Scanner
• CCTV, Security
• ATM, Cash recycler
• POS
• Pumps and Valves
• Heliostat Controller
• CNC Machines
