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STMicroelectronics L6472H
- Part No.:
- L6472H
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
L6472H.pdf
- Description:
- IC MTR DRV BIPLR 3.3/5V 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,102
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Product details
Overview
L6472H 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 interface (5 Mbit/s). It is used in precision motion control systems such as industrial automation actuators and medical infusion pumps.
For engineers reviewing the L6472H datasheet, L6472H pinout, L6472H application, or L6472H equivalent, this page delivers verified technical context, validated pin functions, confirmed microstepping performance metrics, real-world application mappings, and authoritative alternative part comparisons - all grounded in ST's production-grade documentation (DocID022729 Rev 5).
Technical Context
The L6472H integrates dual low-RDS(on) DMOS full bridges with on-chip non-dissipative current sensing, enabling precise torque regulation without external sense resistors. Its digital control core executes user-defined motion profiles (acceleration, deceleration, target position) via SPI-configurable registers including SPEED, ACC, DEC, and STEP_MODE.
It implements predictive current control with auto-adjusted adaptive decay - dynamically switching between slow and fast decay modes per step to minimize torque ripple and improve efficiency. Thermal warning, UVLO, and dual-level overtemperature protection ensure robust operation in demanding embedded motor control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 8–45 V - 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 drive of mid-torque stepper motors (e.g., NEMA 17–23) without external current amplification. |
| Microstepping Resolution | Up to 1/16 - achieves smooth, low-vibration positioning ideal for optical alignment stages and lab instrumentation. |
| SPI Interface Speed | 5 Mbit/s - allows real-time motion command updates and status polling with sub-microsecond latency. |
| Current Sensing | Non-dissipative on-chip sensing - eliminates power loss and thermal drift associated with external shunt resistors. |
| Protection Features | Overcurrent (per MOSFET), UVLO, thermal warning + shutdown - provides fault resilience without external supervision circuitry. |
| Decay Mode | Adaptive predictive decay - automatically optimizes PWM off-time per phase to maintain current accuracy across speed and load variations. |
Pinout & Package
HTSSOP28 package: thermally enhanced 28-pin exposed-pad surface-mount package with 0.65 mm pitch, optimized for high-current motor drive thermal dissipation and PCB layout compactness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Logic supply input | 3.3 V ±10% supply for internal digital core and SPI interface; separate from power stage supply (VM). |
| VM | Motor power supply input | 8–45 V high-current input for H-bridge power switches; connects directly to motor bus and bulk capacitance. |
| A1, A2, B1, B2 | Bridge output terminals | Direct connections to two-phase bipolar stepper motor windings; each pair forms a full H-bridge leg. |
| REFIN | Reference voltage input | Analog reference for current regulation; sets full-scale current via external resistor (TVAL registers scale relative to this). |
| CLK | External clock input | Optional 1–16 MHz crystal or oscillator input to replace internal RC oscillator for timing-critical applications. |
| SPI_CS, SPI_MOSI, SPI_MISO, SPI_SCK | SPI interface signals | Standard 4-wire SPI interface supporting full-duplex register read/write at up to 5 Mbit/s; no hardware flow control required. |
| STBY, RESET | Control inputs | Active-low standby and reset pins enable system-level power sequencing and safe initialization before motor activation. |
| FLAG, BUSY/SYNC | Status outputs | FLAG asserts on alarm events (overtemp, OCP); BUSY/SYNC provides motion status or synchronized clock output for multi-axis coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable slew rate | Configurable DMOS gate drive edge rate reduces EMI and prevents shoot-through during switching transitions. |
| Predictive current control | Real-time current prediction minimizes chopper error, enabling stable 1/16 microstepping even at high speeds (>1000 steps/s). |
| Integrated absolute position counter | 32-bit on-chip position register (ABS_POS) maintains accurate step count through power cycles when retained in nonvolatile memory. |
| Two-level thermal protection | Thermal warning flag at 140 °C and hard shutdown at 165 °C - enables graceful degradation before catastrophic failure. |
| Non-dissipative overcurrent protection | Per-MOSFET current limit detection using internal sensing - eliminates need for four external sense resistors and associated PCB area. |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
Use Scenario: High-precision linear actuation in desktop CNC mills and 3D printer extruders requiring repeatable sub-millimeter positioning. IC Role / Device Role / Timing Role: Full-bridge stepper driver executing closed-loop motion profiles via SPI commands; manages acceleration/deceleration ramps and microstep interpolation. Use Value: 1/16 microstepping + adaptive decay reduces mechanical resonance and audible noise, improving surface finish and print fidelity. |
Use Scenario: Controlled fluid delivery in portable infusion pumps where silent, vibration-free operation and dose accuracy are critical. IC Role / Device Role / Timing Role: Motor controller regulating syringe plunger advancement via programmable speed profiles and position feedback (via ABS_POS register). Use Value: Non-dissipative current sensing ensures stable torque at low speeds (<10 RPM), preventing dose overshoot during start/stop transitions. |
| Lab Automation Stages | Automated Optical Inspection Systems |
Use Scenario: XY translation stages in semiconductor wafer inspection tools requiring nanometer-level repeatability and minimal settling time. IC Role / Device Role / Timing Role: Motion engine executing GoTo and Move commands with configurable acceleration; FLAG pin triggers image capture upon position lock. Use Value: Predictive current control maintains ±1 LSB current accuracy across temperature, ensuring consistent step torque and positional stability. |
Use Scenario: High-speed camera focus and lens positioning in AOI systems where rapid, jitter-free movement avoids motion blur. IC Role / Device Role / Timing Role: SPI-synchronized stepper driver coordinated with BUSY/SYNC output to align motor motion with image acquisition timing. Use Value: 5 Mbit/s SPI enables <10 µs command latency, allowing dynamic profile updates mid-motion for adaptive focusing sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher voltage range (12–45 V), but analog-only interface (step/direction), no integrated motion profiling or position counter. | Requires external MCU for trajectory generation; lacks SPI register access and fault reporting granularity. | Choose when cost-sensitive designs prioritize simplicity over autonomous motion control. |
| DRV8825 | Lower peak current (2.2 A), fixed 1/32 microstepping, no adaptive decay - uses standard slow/fast decay selection. | Less effective at suppressing resonance in mid-frequency range (200–800 Hz); requires external current sense resistors. | Prefer for low-power, space-constrained applications where thermal headroom is ample and advanced current control is unnecessary. |
Compared with TB6600HG and DRV8825, the L6472H uniquely combines autonomous motion profiling, non-dissipative sensing, and adaptive decay - reducing MCU firmware overhead and improving torque consistency across speed and load, especially in closed-loop positioning systems.
Availability
L6472H is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, lab automation stages, and automated optical inspection systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for L6472H 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 embedded processing solutions for industrial and automotive markets.
The L6472H belongs to ST's dedicated stepper motor driver product line, engineered to simplify high-precision motion control by integrating power stages, intelligent current regulation, and SPI-based motion command execution - eliminating the need for external microcontrollers in basic positioning tasks.
FAQ
What is the maximum microstepping resolution supported by the L6472H?
The L6472H supports up to 1/16 microstepping, configured via the STEP_MODE register. This resolution is achieved using adaptive decay predictive current control - not fixed decay modes - ensuring accurate current waveform shaping across all microsteps, even at high step rates exceeding 1000 steps/second.
Does the L6472H require external current sense resistors?
No. The L6472H implements non-dissipative on-chip current sensing for both motor phases, eliminating external shunt resistors. Current regulation is set via the TVAL_HOLD, TVAL_RUN, TVAL_ACC, and TVAL_DEC registers referenced to the REFIN voltage, enabling precise torque control without power loss or board space overhead.
How does the L6472H handle thermal overload conditions?
The L6472H features two-tier thermal protection: a thermal warning flag activates at 140 °C (allowing firmware to reduce load or throttle speed), and automatic thermal shutdown occurs at 165 °C. Both thresholds are factory-trimmed and do not require external components - ensuring reliable operation in enclosed or high-ambient environments.
Can the L6472H operate without an external crystal?
Yes. The L6472H includes an internal RC oscillator (±10% accuracy) sufficient for most motion control applications. An external 1–16 MHz crystal or clock source may be connected to CLK/OSCIN for improved timing precision - particularly beneficial in multi-axis synchronized systems where phase alignment between drivers is critical.
L6472H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L64
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- 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:
- 28-HTSSOP
L6472H FAQ
1.How can I place an order for L6472H through Aetrix?
Please submit a Request for Quotation (RFQ) for L6472H 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 L6472H reliable?
The price and inventory of L6472H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6472H is usually 5 days.
3.What payment methods are accepted for L6472H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6472H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6472H?
L6472H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6472H 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 L6472H?
For technical support, including L6472H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6472H requirements.
6.How does Aetrix verify that L6472H is sourced from the original manufacturer or authorized distributors?
All L6472H 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 L6472H meets industry standards.
7.What is the process for return or replacement of L6472H?
All L6472H units undergo pre-shipment inspection (PSI). If there is an issue with L6472H, 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 L6472H part is unused and in its original packaging.
Return procedure for L6472H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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