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STMicroelectronics L6472PDTR
- Part No.:
- L6472PDTR
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Datasheet:
-
L6472PDTR.pdf
- Description:
- IC MTR DRV BIPLR 3.3V/5V 36PWRSO
- Quantity:
- Payment:
- Shipping:
Inventory:7,535
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Product details
Overview
L6472PDTR from STMicroelectronics is a fully integrated, SPI-controlled microstepping motor driver for two-phase bipolar stepper motors, featuring 8–45 V operation, 7.0 A peak / 3.0 A rms output current, adaptive decay current control, and up to 1/16 microstepping resolution. It integrates dual low-RDS(on) DMOS full bridges with on-chip non-dissipative current sensing and programmable slew rate, enabling precise torque regulation in compact motion control systems such as industrial automation actuators and precision lab equipment.
For engineers reviewing the L6472PDTR datasheet, L6472PDTR pinout, L6472PDTR application, or L6472PDTR equivalent, key selection considerations include its predictive current control architecture, SPI-configurable motion profiles (acceleration/deceleration/target position), dual overtemperature protection levels, non-dissipative overcurrent detection per MOSFET, and POWERSO36 package thermal performance for sustained 3.0 A rms operation.
Technical Context
The L6472PDTR implements a digital motion controller core that executes user-defined speed profiles via register-based commands (e.g., Run, Move, GoTo) and supports step-clock mode for external timing. Its predictive current control algorithm dynamically adjusts decay mode-switching between slow, fast, and mixed decay-based on real-time current error and step phase to minimize torque ripple and audible noise.
It features an integrated 3.0 V linear regulator for logic supply, charge pump for high-side gate drive, and configurable blanking time/deadtime to prevent shoot-through. The BUSY/SYNC pin provides either motion status indication or synchronized clock output, while the FLAG pin signals alarms including overtemperature, undervoltage, and overcurrent events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 8–45 V DC - supports wide-input industrial and battery-backed motion systems without external DC-DC pre-regulation. |
| Output Current | 7.0 A peak / 3.0 A rms - enables direct driving of NEMA 23-class stepper motors at full torque without external heatsinking under typical PCB layout conditions. |
| Microstepping Resolution | Up to 1/16 step - achieves smooth low-speed operation and sub-micron positioning accuracy in closed-loop or open-loop systems. |
| SPI Interface Speed | 5 Mbit/s - allows real-time parameter updates (e.g., TVAL_RUN, ACC, DEC) during motion without interrupting trajectory execution. |
| Current Sensing | Non-dissipative on-chip sensing - eliminates external sense resistors and associated power loss, improving efficiency and reducing BOM count. |
| Thermal Protection | Two-level overtemperature: warning flag at 140 °C, shutdown at 165 °C - enables graceful fault handling before irreversible damage. |
| Overcurrent Detection | Programmable per-MOSFET threshold with automatic shutdown - protects against phase short-circuit or wiring faults without relying on external comparators. |
Pinout & Package
Package: POWERSO36 - thermally enhanced exposed-pad power package with 36 leads, optimized for high-current motor drive applications requiring >2.5 A continuous output and efficient heat dissipation via PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | 8–45 V input for internal regulators and power bridges; requires local 100 nF + 10 µF decoupling. |
| GND | Power and signal ground | Common reference for logic, analog sensing, and power stages; must be connected to thermal pad for optimal thermal performance. |
| OUT1A–OUT2B | DMOS full-bridge outputs | Four terminals connecting directly to bipolar stepper motor phases (A+, A−, B+, B−); each rated for 7 A peak. |
| REF | Current reference setting | Analog voltage input (0–2.5 V) scaling full-scale current; sets TVAL_HOLD/RUN/ACC/DEC registers' amplitude. |
| CLK | External oscillator input | Accepts 1–16 MHz crystal or clock source; used for internal timing when internal oscillator is disabled. |
| SPI_CS, SPI_MOSI, SPI_MISO, SPI_SCK | SPI interface signals | Standard 4-wire SPI bus (3.3 V logic) for configuration, status readback, and motion command issuance. |
| BUSY/SYNC | Multi-function status/clock pin | Configurable as open-drain BUSY indicator (low during motion) or CMOS SYNC clock output (divided from internal oscillator). |
| FLAG | Interrupt alarm output | Open-drain active-low signal asserting on overtemperature, undervoltage, overcurrent, or thermal warning events. |
| SW | External switch input | Active-low input accepting mechanical or optical limit/home switch signals; triggers GoUntil or ReleaseSW commands. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive decay current control | Automatically selects optimal decay mode per microstep to reduce torque ripple and acoustic noise without manual tuning. |
| Programmable motion profiles | Acceleration, deceleration, max/min speed, and target position set via SPI registers-enabling smooth S-curve or trapezoidal motion without host CPU overhead. |
| Non-dissipative overcurrent protection | Detects overcurrent on each MOSFET using internal current mirrors-eliminates need for four external sense resistors and associated power loss. |
| Dual thermal protection | Separate warning (140 °C) and shutdown (165 °C) thresholds allow system-level thermal management before catastrophic failure. |
| Integrated 3.0 V regulator | Supplies internal logic and SPI interface from VDD-removes requirement for external LDO, simplifying power tree design. |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
|
Use Scenario: Open-loop positioning of X/Y/Z axes in benchtop CNC mills with <100 mm travel and ≤5 kg load. IC Role / Device Role: Full-bridge motor driver executing acceleration-limited moves via SPI-set ACC/DEC registers and real-time BUSY polling. Use Value: 1/16 microstepping and predictive current control deliver sub-10 µm repeatability and silent operation below 300 RPM. |
Use Scenario: Precise syringe plunger advancement in portable infusion pumps requiring <±0.5% flow accuracy over 24-hour runtime. IC Role / Device Role: Closed-loop stepper driver with external encoder feedback and SPI-synchronized GoTo commands for dose calibration. Use Value: Non-dissipative current sensing ensures stable torque across battery voltage drop (10–16 V), maintaining flow consistency without recalibration. |
| Lab Automation Robotics | 3D Printer Extruder Control |
|
Use Scenario: Multi-axis robotic arm for sample handling in automated ELISA readers, operating in cleanroom environments. IC Role / Device Role: SPI-configured motion controller managing coordinated multi-motor moves using MARK/GoMark and ABS_POS tracking. Use Value: Absolute position counter and programmable slew rate suppress mechanical resonance during rapid direction reversals (<50 ms settling). |
Use Scenario: High-resolution filament feed control in desktop FDM printers, where extruder motor must respond to layer-height-dependent step rates. IC Role / Device Role: Microstepping driver receiving step-clock inputs from main controller while autonomously managing current decay via adaptive mode. Use Value: Programmable TVAL_RUN and FS_SPD registers enable dynamic current reduction during coasting, cutting extruder coil heating by 40% at 200 mm/s print speeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-LA | Integrated UART interface, stealthChop2 quiet stepping, lower 2.8 A rms rating, QFN32 package | Better EMI profile and acoustic noise suppression; lacks dual thermal thresholds and non-dissipative overcurrent per MOSFET | Preferred for consumer-grade 3D printers prioritizing silence; unsuitable for industrial overload conditions requiring L6472PDTR's robust fault coverage. |
| DRV8825 | Fixed 1/32 microstepping, external current sense resistors, no SPI motion engine, HTSSOP28 package | Requires host MCU to manage acceleration profiles; higher board space and power loss due to 0.1 Ω sense resistors | Lower-cost option for simple constant-speed applications; not viable for complex positioning without added firmware overhead. |
Compared with TMC2209-LA and DRV8825, the L6472PDTR uniquely combines SPI-based autonomous motion control, per-FET overcurrent protection, and non-dissipative sensing-making it the only choice among the three for thermally constrained industrial actuators requiring guaranteed fault response and minimal external components.
Availability
L6472PDTR is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, lab automation robotics, and 3D printer extruder control requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for L6472PDTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The L6472PDTR belongs to ST's dedicated motion control IC portfolio, engineered specifically for high-reliability, integrated stepper motor drive in space-constrained industrial and medical equipment where autonomous motion execution and comprehensive fault protection are mandatory.
FAQ
What is the maximum ambient temperature for continuous 3.0 A rms operation in the POWERSO36 package?
At 3.0 A rms output with 2-layer 2 oz copper PCB and 5 cm² thermal pad copper area, the L6472PDTR sustains continuous operation up to 70 °C ambient temperature before triggering thermal warning at 140 °C junction. Derating to 2.5 A rms is recommended above 70 °C ambient without forced airflow.
Can the L6472PDTR operate without an external crystal or oscillator?
Yes-the L6472PDTR includes an internal 16 MHz RC oscillator that enables full functionality (including SPI communication and motion control) without any external timing component. An external clock (1–16 MHz) is optional and used only when higher frequency stability or synchronization across multiple drivers is required.
How does the non-dissipative current sensing affect system efficiency compared to shunt-based drivers?
By eliminating four external 0.05–0.1 Ω sense resistors, the L6472PDTR removes ~1.2 W of continuous I²R loss at 3.0 A rms-improving overall system efficiency by 3–5% in typical 24 V, 3 A applications and reducing thermal stress on adjacent components.
Is the BUSY pin compatible with 5 V logic microcontrollers?
No-the BUSY/SYNC pin is a 3.3 V CMOS-compatible open-drain output. Direct connection to 5 V MCU GPIO requires a pull-up resistor to 3.3 V and level-shifting if the host cannot tolerate 3.3 V logic thresholds; interfacing with 5 V systems without translation may cause unreliable BUSY assertion detection.
L6472PDTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L64
- Package/Case:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- SPI
- Technology:
- DMOS
- Step Resolution:
- 1 ~ 1/16
- Applications:
- General Purpose
- Current - Output:
- 3A
- Voltage - Supply:
- 3.3V, 5V
- Voltage - Load:
- 8V ~ 45V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSO-36 Slug Up
L6472PDTR FAQ
1.How can I place an order for L6472PDTR through Aetrix?
Please submit a Request for Quotation (RFQ) for L6472PDTR 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 L6472PDTR reliable?
The price and inventory of L6472PDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6472PDTR is usually 5 days.
3.What payment methods are accepted for L6472PDTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6472PDTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6472PDTR?
L6472PDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6472PDTR 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 L6472PDTR?
For technical support, including L6472PDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6472PDTR requirements.
6.How does Aetrix verify that L6472PDTR is sourced from the original manufacturer or authorized distributors?
All L6472PDTR 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 L6472PDTR meets industry standards.
7.What is the process for return or replacement of L6472PDTR?
All L6472PDTR units undergo pre-shipment inspection (PSI). If there is an issue with L6472PDTR, 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 L6472PDTR part is unused and in its original packaging.
Return procedure for L6472PDTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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