TMC2241: 65V 2ARMS Smart Integrated Stepper Driver with S/D and SPI
The TMC2241 is a smart, high-voltage stepper driver IC with step and direction control and serial communication interfaces. It combines the industry’s most advanced stepper motor driver based on 256 microsteps, built-in indexer and two fully integrated 65V, 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-inclass performance. The H-bridge field-effect transistors (FETs) have very low impedance, resulting in high driving efficiency and minimal heat generated. The typical total RON (high side + low side) is 0.31Ω.
The maximum RMS current per H-bridge is 2ARMS with VS = 24V and 1.7ARMS with VS = 48V supply at room temperature, assuming a four-layer PCB.
The permissible continuous current is thermally limited. It depends on the operation duty cycle, and on the thermal characteristics of the application (PCB ground planes, heatsink, and ventilation).
The maximum full-scale current per H-bridge is 3A (peak). This current is defined as the maximum current setting of the embedded current drive regulation circuit.
The internal overcurrent protection (OCP) adapts to the motor current range to protect the IC and motor, and limits peak current to 5A in the highest setting.
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 TMC2241 features extensive 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 TMC2241 provides functions to measure the driver temperature, estimate the motor temperature, and measure one external analog input.
The TMC2241 is available in a small TQFN38 5mm x 7mm package with exposed pad.
Key Features and Benefits
- Voltage Range: 4.5V to 65V DC
- Low RON (HS + LS): 0.31Ω Typical (TA = 25°C)
- Current Ratings per H-Bridge (Typical at 25°C):
- 2ARMS (2.8A Sine Peak) at VS = 24V
- 1.7ARMS (2.4A Sine Peak) at VS = 48V
- Fully Integrated Lossless Current Sensing
- Step/Direction (S/D) Interface with MicroPlyer Step Interpolation
- SPI and Single-Wire UART
- Encoder Interface
- Highest Resolution of 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 7mm TQFN38 Package
Applications
- Textile, Sewing Machines, Knitting Machines
- Lab and Factory Automation
- 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
- Stage Lighting
| Evaluation Board |
| The TMC2241 can be evaluated with the TMC2241-EVKIT. |
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