TMC5240ATJ+T

The TMC5240 is a smart high-performance stepper motor controller and driver IC with serial communication interfaces (SPI, UART) and extensive diagnostic capabilities. It combines a flexible, jerk-optimized ramp generator for automatic target positioning with industries’ most advanced stepper motor driver based on the 256 microsteps, built-in indexer and fully integrated 36V, 3.0A MAX H-Bridges plus non-dissipative integrated current sensing (ICS). ADI-Trinamic's sophisticated StealthChop2 chopper ensures absolutely noiseless operation combined with maximum efficiency and best motor torque. High integration, high energy efficiency, and a small form factor enable miniaturized and scalable systems for cost-effective solutions. The complete solution reduces the learning curve to a minimum while giving best-in-class performance. The H-Bridge field-effect transistors (FETs) have very low impedance resulting in high driving efficiency and minimal heat generated. The typical total R o N (high side + low side) is 0.23Ω. The maximum RMS current per H-Bridge is IRMS = 2.1A RMS at room temperature assuming a four-layer PCB. The maximum output current per H-Bridge is I MAX = 5.0A MAX limited by the Overcurrent Protection (OCP). Since this current is limited by thermal considerations, the actual maximum RMS current would depend on the thermal characteristics of the application (PCB ground planes, heatsinks, ventilation, etc). The maximum full-scale current per H-Bridge is 1 FS = 3.0A and can be set by an external resistor connected to IREF. This current is defined as the maximum current setting of the embedded current drive regulation circuit. The non-dissipative ICS eliminates the bulky external power resistors resulting in a dramatic space and power saving compared with mainstream applications based on external sense resistors while providing the same overall accuracy. The TMC5240 features abundant diagnostics and protections such as short protection/OCP, thermal shutdown, and undervoltage lockout (UVLO). During thermal shutdown and UVLO events, the driver is disabled. Furthermore, the TMC5240 provides functions to measure the driver temperature, estimate the motor temperature, and measure one external analog input. The TMC5240 is available in a small TQFN32 5mm x 5mm package and a thermally optimized TSSOP38 9.7mm x 4.4mm with an exposed pad.

Applications

• Textile, Sewing Machines, Knitting Machines
• Lab and Factory Automation
• 3D Printers, ID Printers/Card Printers
• Liquid Handling, Medical Applications
• Office Automation and Paper Handling
• POS, Massage Chairs
• ATM, Cash Recycler, Bill Validators, Cash Machines
• CCTV, Security
• Pumps and Valve Control
• Heliostat and Antenna Positioning

Key features

• Voltage Range 4.5V to 36V DC
• Low RDS(ON) (HS + LS): 230 mΩ Typical <T A = 25°C>
• Current Ratings per H-Bridge (Typical at 25°C):
• I MAX = 5.0A (Bridge Peak Current)
• I RMS = 2.1A RMS (3A Sine Wave Peak)
• Fully Integrated Lossless Current Sensing
• Eight-Point Motion Controller for Minimum Jerk
• SPI and Single Wire UART
• Encoder Interface and 2× Reference Switch Input
• Highest Resolution 256 Microsteps per Full Step
• Flexible Wave Table and Phase Shift to Match Motor
• StealthChop2 Silent Motor Operation
• SpreadCycle Highly Dynamic Motor Control Chopper
• Jerk-Free Combination of StealthChop2 and SpreadCycle
• StallGuard2 and StallGuard4 Sensorless Motor Load Detection
• CoolStep Current Control for Energy Savings up to 75%
• Passive Braking and Freewheeling Mode
• Motor Phase Temperature Estimation
• Chip Temperature Measurement
• General Purpose Analog Input
• Full Protection and Diagnostics
• Overvoltage Protection Output
• Compact 5mm x 5mm TQFN32 Package or 9.7mm x 4.4mm TSSOP38