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Analog Devices Inc./Maxim Integrated TMC262-LA-T
- Part No.:
- TMC262-LA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TMC262-LA-T.pdf
- Description:
- IC MTR DRVR BIPLR 3.3-5.5V 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,754
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Product details
Overview
TMC262-LA-T from TRINAMIC Motion Control GmbH & Co. KG is a two-phase stepper motor predriver IC that interfaces between motion controllers and external N- and P-channel MOSFETs to deliver up to 10A RMS motor current at 5–60V supply. It supports 256 microsteps via MicroPlyer™ interpolation, implements SpreadCycle™ chopper control for low-resonance sine-wave current, and integrates StallGuard2™ for sensorless load detection - used in lab automation liquid handling systems requiring silent, precise positioning.
For engineers reviewing the TMC262-LA-T datasheet, TMC262-LA-T pinout, TMC262-LA-T application, or TMC262-LA-T equivalent, key selection criteria include its QFN32 package with exposed thermal pad, standalone STEP/DIR + SPI dual-interface support, CoolStep™-enabled current reduction (up to 75% power savings), and integrated diagnostics including short-to-GND, overtemperature, and undervoltage protection.
Technical Context
The TMC262-LA-T operates as a smart gate driver predriver - not a full H-bridge - requiring four external dual-MOSFETs per phase. Its internal architecture includes dual DACs, 1024-entry sine/cosine tables, and a 15 MHz oscillator with external clock option (8–20 MHz). The chip uses cycle-by-cycle current chopping with two selectable modes: SpreadCycle™ (optimized for smoothness and efficiency) and classic constant-off-time.
StallGuard2™ measures back-EMF on motor coils to detect mechanical load without sensors, enabling homing to physical stops. CoolStep™ dynamically scales coil current based on real-time StallGuard2 feedback, while MicroPlyer™ interpolates 1/16-step inputs into true 256 microsteps - all configurable via SPI or fixed in standalone mode using CFG pins (CSN/SCK/SDI).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 60 V DC - powers external MOSFET bridge; higher voltages require external gate drivers like MAX5064B. |
| Max Motor Current | 10 A RMS - achieved using discrete N+P MOSFETs; current set by external sense resistors (e.g., 100 mΩ for 2.8 A peak). |
| Microstep Resolution | Up to 256 microsteps per full step - delivered via MicroPlyer™ interpolation from 1/16-step input or direct SPI register writes. |
| Chopper Algorithm | SpreadCycle™ - high-precision current control minimizing torque ripple and audible noise vs. classic constant-off-time mode. |
| Protection Features | Short-to-GND, short-to-VS, overtemperature (136°C threshold), undervoltage (4.25 V), open-load detection - enables robust field operation. |
| Interface Options | SPI (20-bit command/status) and STEP/DIR - both active simultaneously; standalone mode uses CFG pins to fix CS, hysteresis, and resolution. |
| Package | 5 mm × 5 mm QFN32 with exposed thermal pad - requires solid GND plane connection under die pad for thermal management. |
Pinout & Package
Package: 5 mm × 5 mm QFN32 with exposed thermal pad (GND-connected die attach pad). Requires low-inductance layout, Kelvin sense resistor routing, and dedicated 470 nF ceramic capacitor on 5VOUT pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HA1, HA2, HB1, HB2 | High-side P-MOSFET gate drivers | Drive P-channel MOSFET gates with VHS-referenced output; require external VHS decoupling (220 nF–1 µF). |
| LA1, LA2, LB1, LB2 | Low-side N-MOSFET gate drivers | Drive N-channel MOSFET gates referenced to 5VOUT; 5VOUT supplies internal analog/digital logic and low-side drivers. |
| SRA, SRB | Current sense inputs | Connect to top/bottom of sense resistors; SRB must use Kelvin connection to GND plane near resistor for accurate chopper control. |
| CSN, SCK, SDI | CFG pins / SPI interface | In standalone mode: set current scale (CS=15/31), chopper hysteresis (HSTRT=2/6), microstep resolution (256/16 w/ interp). In SPI mode: chip select, clock, data in. |
| SG_TST | StallGuard2™ output | Open-drain stall indicator (active-high); valid only above minimum velocity; used for stall detection and homing without limit switches. |
| STEP, DIR | Step-and-direction inputs | 20 ns glitch-filtered digital inputs; support rising/falling edge stepping; drive internal microstep counter and sine table. |
Key Features
| Feature | Design Value |
|---|---|
| StallGuard2™ | Back-EMF-based load sensing enables stall detection and mechanical end-stop homing without external sensors - reduces BOM cost and board space. |
| CoolStep™ | Reduces motor current in real time based on StallGuard2 feedback, cutting power dissipation by up to 75% during low-load operation - lowers thermal stress and extends system lifetime. |
| MicroPlyer™ | Interpolates coarse 1/16-step inputs into smooth 256 microsteps - eliminates need for high-frequency STEP pulses while preserving positional resolution. |
| SpreadCycle™ | Adaptive chopper algorithm minimizes current distortion across speed/load ranges, delivering quieter motor operation and reduced vibration vs. fixed off-time schemes. |
| Integrated Diagnostics | Real-time fault reporting via SPI status register and dedicated outputs (e.g., SG_TST) - simplifies failure analysis and improves system reliability in medical and lab equipment. |
Applications
| Lab Automation Liquid Handling | Medical Diagnostic Instrumentation |
|---|---|
Use Scenario: Precise pipetting and reagent dispensing in automated analyzers with multi-axis gantries. IC Role / Device Role / Timing Role: Pre-driver controlling external MOSFETs for bipolar stepper motors driving syringe pumps and valve actuators. Use Value: StallGuard2™ enables contactless homing to fluidic end-stops; CoolStep™ reduces heat in enclosed enclosures where forced cooling is impractical. | Use Scenario: Positioning X-ray collimators and sample stages in portable imaging devices. IC Role / Device Role / Timing Role: High-accuracy microstepping predriver interfacing with motion controller over SPI for synchronized multi-motor coordination. Use Value: SpreadCycle™ ensures silent operation critical for patient comfort; 256 microstep resolution achieves sub-10 µm positioning repeatability. |
| Factory Automation Pick-and-Place | CCTV Pan-Tilt-Zoom Mechanisms |
Use Scenario: High-speed component placement on PCBs using compact stepper-driven linear modules. IC Role / Device Role / Timing Role: Dual-interface (STEP/DIR + SPI) predriver supporting legacy motion firmware while enabling advanced diagnostics via SPI. Use Value: Standalone mode allows rapid prototyping without SPI initialization; integrated short-circuit protection prevents field failures from wiring faults. | Use Scenario: Smooth, jitter-free camera positioning in outdoor security systems exposed to temperature extremes. IC Role / Device Role / Timing Role: Thermal-aware predriver managing motor current based on ambient conditions via integrated temperature sensor (136°C trip point). Use Value: Low EMI slope-controlled gate drivers reduce RF interference with video transmission; QFN32 package enables compact PTZ module design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor predriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2590-LA-T | Single-chip 60 V, 6 A integrated driver (no external MOSFETs required); lacks StallGuard2™ and CoolStep™. | Better for space-constrained designs needing lower current; unsuitable for >6 A or sensorless load detection. | Select TMC2590-LA-T when external MOSFET layout complexity must be avoided and max current ≤6 A. |
| DRV8825PWPR | 5.5–45 V, 2.2 A integrated driver; no SpreadCycle™, no StallGuard2™, no CoolStep™; only 32 microsteps max. | Lower-cost solution for basic CNC or 3D printer axes where advanced diagnostics and ultra-fine microstepping are unnecessary. | Select DRV8825PWPR for cost-sensitive consumer-grade motion systems without thermal or acoustic constraints. |
Compared with TMC2590-LA-T and DRV8825PWPR, the TMC262-LA-T uniquely delivers 10 A capability with external MOSFETs, sensorless stall detection, and adaptive current control - making it the only choice for high-power, high-precision, thermally constrained industrial and medical stepper applications.
Availability
TMC262-LA-T is available at Aetrix Electronics and suitable for lab automation liquid handling, medical diagnostic instrumentation, and factory automation pick-and-place systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TMC262-LA-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in intelligent motion control ICs, known for patented technologies in stepper and BLDC motor control.
The TMC262 product line targets high-efficiency, high-precision stepper motor drive in space- and thermally constrained applications - designed specifically for medical, lab, and industrial equipment demanding silent, reliable, and sensorless motion control.
FAQ
What is the function of the TMC262-LA-T in a stepper motor system?
The TMC262-LA-T is a stepper motor predriver IC that controls external N- and P-channel MOSFETs to drive two-phase bipolar stepper motors. It does not integrate power MOSFETs but provides precision current control, microstepping, and diagnostics. In a typical system, the TMC262-LA-T receives STEP/DIR commands or SPI configuration, generates PWM gate signals, and manages motor current via chopper control - enabling features like StallGuard2™ and CoolStep™. The TMC262-LA-T itself handles logic, timing, and protection, while external MOSFETs handle high-current switching.
Does the TMC262-LA-T include integrated power MOSFETs?
No, the TMC262-LA-T does not include integrated power MOSFETs. It is a predriver IC designed to drive external discrete N- and P-channel MOSFETs - typically four dual-MOSFET packages - allowing flexible current scaling up to 10 A RMS. This architecture separates logic and power stages, improving thermal management and enabling custom MOSFET selection for voltage, current, and switching performance. The TMC262-LA-T provides gate drive signals, current sensing, chopper control, and protection logic, but relies entirely on external FETs for motor current delivery.
How does StallGuard2™ work in the TMC262-LA-T, and what is its practical use?
StallGuard2™ in the TMC262-LA-T measures motor coil back-EMF during motion to infer mechanical load without external sensors. It outputs a digital signal (SG_TST pin) indicating stall when load exceeds a programmable threshold. Practically, this enables homing to mechanical end-stops without limit switches - widely used in lab liquid handlers and medical instruments. The TMC262-LA-T uses StallGuard2™ feedback to drive CoolStep™ current reduction, lowering power consumption during idle or low-load movement. For reliable operation, StallGuard2™ requires sufficient motor velocity and proper sense resistor calibration - both documented in the TMC262-LA-T datasheet.
Can the TMC262-LA-T operate without an SPI interface?
Yes, the TMC262-LA-T supports standalone operation using three configuration pins (CSN, SCK, SDI) to fix current scale, chopper hysteresis, and microstep resolution - eliminating the need for SPI initialization. In this mode, STEP/DIR commands directly control motor motion, and StallGuard2™ and CoolStep™ remain functional with default settings (e.g., SGT=2, EN_PFD enabled). However, advanced features like real-time current tuning, detailed diagnostics, or dynamic parameter updates require SPI communication. The TMC262-LA-T's dual-interface capability makes it suitable for both rapid prototyping (standalone) and production systems requiring full configurability (SPI).
What thermal management requirements apply to the TMC262-LA-T?
The TMC262-LA-T requires careful thermal design due to its QFN32 package with exposed die pad. The pad must be soldered to a solid, low-thermal-resistance GND plane - ideally with multiple thermal vias - to dissipate heat from internal logic and gate drivers. Layout guidelines specify keeping sense resistors, 5VOUT/VS decoupling capacitors, and MOSFETs close to the IC to minimize parasitic inductance. The device includes an internal temperature sensor with 136°C overtemperature shutdown (OT_SENSE), and thermal performance depends heavily on PCB copper area and airflow. TRINAMIC recommends ≥200 mm² of 2-oz copper connected to the die pad for continuous 10 A operation with external MOSFETs.
TMC262-LA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (4)
- Interface:
- SPI, Step/Direction
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/256
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 3V ~ 5.25V
- Voltage - Load:
- 9V ~ 59V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
TMC262-LA-T FAQ
1.How can I place an order for TMC262-LA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC262-LA-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMC262-LA-T reliable?
The price and inventory of TMC262-LA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC262-LA-T is usually 5 days.
3.What payment methods are accepted for TMC262-LA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC262-LA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC262-LA-T?
TMC262-LA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC262-LA-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMC262-LA-T?
For technical support, including TMC262-LA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC262-LA-T requirements.
6.How does Aetrix verify that TMC262-LA-T is sourced from the original manufacturer or authorized distributors?
All TMC262-LA-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMC262-LA-T meets industry standards.
7.What is the process for return or replacement of TMC262-LA-T?
All TMC262-LA-T units undergo pre-shipment inspection (PSI). If there is an issue with TMC262-LA-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMC262-LA-T part is unused and in its original packaging.
Return procedure for TMC262-LA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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