TMC5271

The TMC5271 is a miniaturized smart high-performance single-axis stepper motor controller and driver IC with serial communication interfaces (SPI and UART) and extensive diagnostic capabilities. Highest integration, high energy efficiency, and a small form factor enable miniaturized and scalable systems for cost-effective solutions.

StealthChop2™ ensures absolutely noiseless operation combined with maximum efficiency and the optimal motor torque control.

The TMC5271 combines a flexible 8-point ramp generator with reduced jerk for automatic positioning with a smart stepper motor driver based on a 256 microstep built-in indexer and two fully integrated 20V, 2.24A_MAX H-bridges plus non-dissipative integrated current sensing (ICS), which eliminates bulky external sense resistors resulting in space and power savings.

The integrated power MOSFETs' low impedance results in high driving efficiency and minimal heat generation.

The typical total RDS(ON) (high side plus low side) is 0.155Ω with a maximum RMS current per H-bridge of I_RMS = 1.6A_RMS and a maximum output current per H-Bridge at I_MAX = 3.0A_MAX (limited by overcurrent protection).

The TMC5271 features abundant diagnostics and protection functions such as short-circuit protection/overcurrent protection, thermal shutdown, and undervoltage lockout.

The TMC5271 is available in a tiny 2.97mm × 3.13mm, 36-pin WLCSP package.

Applications

• Wearables
• Personal Portable Devices
• Optical Systems, Lens Control
• CCTV, Surveillance, Conference Systems Focus/Zoom and Pan/Tilt Control
• Patch and Insulin Pumps
• Pipettes and Liquid Handling
• Small Printing and Scanning Devices
• Lab and Office Automation
• Space-Constrained Stepper Motor Applications