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STMicroelectronics L6472PD
- Part No.:
- L6472PD
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Datasheet:
-
L6472PD.pdf
- Description:
- IC MTR DRV BIPLR 3.3V/5V 36PWRSO
- Quantity:
- Payment:
- Shipping:
Inventory:638
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Product details
Overview
L6472PD from STMicroelectronics is a fully integrated microstepping motor driver IC for two-phase bipolar stepper motors, featuring 8–45 V operation, 7.0 A peak / 3.0 A RMS output current, adaptive decay predictive current control, up to 1/16 microstepping resolution, and SPI-based motion profile programming - deployed in precision lab automation positioning stages.
For engineers reviewing the L6472PD datasheet, L6472PD pinout, L6472PD application, or L6472PD equivalent, key selection considerations include its non-dissipative current sensing architecture, programmable slew rate for EMI control, dual-level thermal protection, and register-mapped motion command set (Run, Move, GoTo, GoUntil) enabling closed-loop-like open-loop positioning without external encoders.
Technical Context
The L6472PD integrates a dual DMOS full-bridge with on-chip current sensing and adaptive decay control logic that dynamically adjusts fast/slow decay timing per step to maintain torque linearity and reduce vibration across microstep transitions. Its digital core executes motion profiles using acceleration (ACC), deceleration (DEC), and target position registers.
SPI interface operates at up to 5 Mbit/s and controls all analog parameters (e.g., TVAL_RUN current amplitude, OCD_TH overcurrent threshold, STEP_MODE resolution) via 24-bit command frames. The device uses an internal oscillator or accepts external clock input on OSCIN, with BUSY/SYNC pin supporting synchronized multi-driver coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 8–45 V DC - supports wide industrial bus voltages including 12 V, 24 V, and 42 V systems without external regulation. |
| Output Current | 7.0 A peak / 3.0 A RMS - enables direct drive of NEMA 23–34 stepper motors with >1.5 N·m holding torque. |
| Microstepping | Up to 1/16 step resolution - achieved via adaptive decay mode, eliminating need for external chopper controllers or microstep indexer ICs. |
| SPI Speed | Up to 5 Mbit/s - allows real-time motion parameter updates within <200 ns per register write, critical for dynamic speed profiling. |
| Current Sensing | Non-dissipative on-chip sensing - eliminates sense resistors and associated power loss, improving thermal efficiency and PCB layout simplicity. |
| Protection Features | Dual-level thermal shutdown + warning, UVLO, per-MOSFET overcurrent detection - ensures robust operation in unattended motion systems. |
| Package | POWERSO36 - thermally enhanced power package with exposed die pad, rated for 1.5°C/W junction-to-case (RθJC) under standard PCB copper pour. |
Pinout & Package
POWERSO36 is a 36-pin thermally optimized power SO package with exposed thermal pad (EP), designed for high-current motor driver applications requiring low RθJA and mechanical stability under vibration. Pin numbering follows top-view convention with pin 1 marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Logic supply input | 3.3 V ±10% supply for internal digital core and SPI interface; decoupling required within 10 mm of pin. |
| VCC | Motor power input | Main 8–45 V motor bus connection; routed with ≥1.5 mm trace width and adjacent ground plane for low-impedance return path. |
| OUT1A–OUT2B | Bridge output terminals | Four high-current DMOS outputs (2 per phase) directly connect to bipolar stepper motor windings; require Kelvin routing for current sensing integrity. |
| SENS1/SENS2 | Current sense inputs | Low-side current sense nodes tied to internal non-dissipative comparator; no external resistor needed. |
| CLK/OSCIN | Timing reference input | Accepts 1–16 MHz external crystal or clock source; internal oscillator defaults to 12 MHz if left floating. |
| SPI_CS, SPI_SCK, SPI_MOSI, SPI_MISO | SPI interface signals | Standard 4-wire SPI interface operating up to 5 Mbit/s; MISO supports daisy-chain readback in multi-driver systems. |
| BUSY/SYNC | Status & synchronization | Open-drain BUSY flag indicates motion execution; configurable as SYNC output to coordinate timing across multiple L6472 devices. |
| FLAG | Interrupt output | Active-low signal asserting on alarm conditions (overcurrent, thermal warning, UVLO); directly interfaces to MCU GPIO with pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Predictive current control | Reduces current ripple by >40% vs. conventional PWM, enabling smoother motion and lower audible noise in medical imaging gantries. |
| Programmable slew rate | Adjustable DMOS switching edge rate minimizes EMI emissions during high-dV/dt transitions - critical for CE/FCC compliance in lab equipment. |
| Adaptive decay mode | Automatically switches between slow/fast decay per microstep to maintain consistent torque across full 1/16 resolution range. |
| Register-based motion engine | On-chip ABS_POS counter and motion command set (Move, GoTo, GoUntil) eliminate need for external motion controller firmware logic. |
| Non-dissipative overcurrent protection | Per-FET trip detection with programmable threshold avoids false triggers from inductive kickback during direction reversal. |
Applications
| Lab Automation Stage Control | Medical Imaging Positioner |
|---|---|
|
Use Scenario: High-precision X-Y translation stage in automated ELISA plate handler, requiring repeatable 5 µm positioning accuracy over 100 mm travel. IC Role / Device Role / Timing Role: Primary stepper driver executing acceleration-limited trapezoidal moves via SPI-set ACC/DEC registers; ABS_POS provides absolute position tracking without homing sensor. Use Value: Adaptive decay maintains torque consistency across microsteps, reducing positional error from 12 µm to ≤3.5 µm RMS over full stroke. |
Use Scenario: Rotational gantry in portable ultrasound probe calibration rig, moving at variable speeds between fixed angular positions. IC Role / Device Role / Timing Role: Motion controller and driver combined - GoUntil command stops rotation at mechanical limit switch while FLAG pin signals event to host MCU. Use Value: Non-dissipative current sensing eliminates heat-generating shunts near sensitive analog front-end, preserving SNR in RF receive chain. |
| Industrial CNC Tool Changer | 3D Printer Extruder Axis |
|
Use Scenario: Indexing carousel with 12 tool stations, requiring rapid, repeatable 30° indexing with <50 ms cycle time and stall detection. IC Role / Device Role / Timing Role: Dual-L6472PD configuration (one per phase) driven synchronously via BUSY/SYNC pins; STATUS register reports MOT_STATUS for stall verification. Use Value: Programmable slew rate reduces conducted EMI below CISPR 11 Class B limits, avoiding interference with PLC I/O modules. |
Use Scenario: High-speed filament feed mechanism in fused deposition modeling (FDM) printer, demanding precise extrusion control at 100–500 mm/min. IC Role / Device Role / Timing Role: Stepper driver executing Run commands with real-time speed updates via SPI; TVAL_ACC/TVAL_DEC registers tune acceleration to prevent layer shift. Use Value: 7.0 A peak current supports high-torque NEMA 17 motors, enabling 0.1 mm layer resolution at 200 mm/s without missed steps. |
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, but max 2.8 A RMS (vs. 3.0 A), no adaptive decay tuning. | Preferred for ultra-low-noise consumer printers; lacks register-level motion command set (e.g., GoUntil) and dual thermal thresholds. | Select when acoustic noise is primary constraint and motion complexity is low; avoid for safety-critical lab automation requiring deterministic stall response. |
| DRV8825 | Fixed 1/32 microstepping, external current sense resistors, no on-chip motion engine - requires external MCU for profile generation. | Suitable for cost-sensitive hobbyist CNC; lacks predictive current control and non-dissipative sensing, increasing board area and thermal load. | Choose only when bill-of-materials cost dominates and design team has firmware resources to implement full motion stack externally. |
Compared with TMC2209-LA and DRV8825, the L6472PD delivers higher current capability with integrated motion intelligence and thermally robust packaging - making it optimal for industrial-grade positioning where reliability, deterministic behavior, and minimal external components are mandatory.
Availability
L6472PD is available at Aetrix Electronics and suitable for lab automation, medical imaging positioning, industrial CNC tool changers, and high-reliability 3D printing applications requiring stable component supply and long-term production continuity.
Supply support for L6472PD 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, specializing in power management, motion control, and microcontroller solutions for industrial and automotive markets.
The L6472PD belongs to ST's dedicated motion control IC portfolio, engineered for embedded stepper motor applications demanding high integration, thermal resilience, and deterministic real-time motion execution without external microcontrollers.
FAQ
What is the maximum microstepping resolution supported by the L6472PD?
The L6472PD supports up to 1/16 microstepping resolution, implemented via its adaptive decay algorithm that dynamically adjusts fast/slow decay timing per microstep to preserve torque linearity. This is configured through the STEP_MODE register (bits 5–3), with values 0b101 selecting 1/16 mode. Unlike fixed-decay drivers, this resolution is maintained across full speed and load ranges without external tuning.
Does the L6472PD require external current sense resistors?
No. The L6472PD uses non-dissipative on-chip current sensing, eliminating external sense resistors. It measures current via integrated MOSFET RDS(on) monitoring with factory-trimmed offset compensation, achieving ±5% current accuracy over temperature. This reduces PCB area, power loss, and thermal stress compared to shunt-based solutions.
How does the L6472PD handle thermal protection?
The L6472PD implements two independent thermal protections: a thermal warning flag (TH_WRN bit in STATUS register) asserts at 140 °C junction temperature, allowing host MCU to reduce load before shutdown; full thermal shutdown activates at 165 °C. Both thresholds are fixed and internally calibrated, with recovery hysteresis of 15 °C to prevent oscillation.
Can the L6472PD operate without an external clock source?
Yes. The L6472PD includes an internal 12 MHz RC oscillator that powers the digital core and motion engine when OSCIN is left unconnected or grounded. External crystals (1–16 MHz) or clock sources may be used for tighter timing accuracy or multi-device synchronization via the SYNC pin, but are not required for basic operation.
L6472PD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L64
- Package/Case:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Packaging:
- Tube
- 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
L6472PD FAQ
1.How can I place an order for L6472PD through Aetrix?
Please submit a Request for Quotation (RFQ) for L6472PD 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 L6472PD reliable?
The price and inventory of L6472PD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6472PD is usually 5 days.
3.What payment methods are accepted for L6472PD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6472PD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6472PD?
L6472PD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6472PD 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 L6472PD?
For technical support, including L6472PD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6472PD requirements.
6.How does Aetrix verify that L6472PD is sourced from the original manufacturer or authorized distributors?
All L6472PD 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 L6472PD meets industry standards.
7.What is the process for return or replacement of L6472PD?
All L6472PD units undergo pre-shipment inspection (PSI). If there is an issue with L6472PD, 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 L6472PD part is unused and in its original packaging.
Return procedure for L6472PD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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