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STMicroelectronics L6482H
- Part No.:
- L6482H
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
L6482H.pdf
- Description:
- IC MTR DRV BIPLR 3.3/5V 38HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
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Product details
Overview
L6482H from STMicroelectronics is a fully integrated microstepping motor controller with embedded motion engine and SPI interface, designed for driving two-phase bipolar stepper motors. It features dual N-channel MOSFET gate drivers, 1/16 microstepping resolution, adaptive decay current control, programmable speed profiles, and non-dissipative overcurrent protection - enabling precise open-loop positioning in industrial automation motion systems.
For engineers reviewing the L6482H datasheet, L6482H pinout, L6482H application, or L6482H equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in CNC and lab equipment, and confirmed alternative options with documented functional differences.
Technical Context
The L6482H integrates a digital motion engine that executes acceleration/deceleration ramps, absolute position tracking, and target-based GoTo commands via SPI-configurable registers (e.g., ACC, DEC, MAX_SPEED, ABS_POS). Its predictive current control loop dynamically adjusts decay mode per step to maintain torque linearity across microstep divisions.
It employs a charge-pump–based high-side gate driver architecture supporting 7.5 V–85 V motor supply, with embedded Miller clamp, programmable deadtime (TDT), blanking time (TBLANK), and gate current (IGATE) tuning - all configured through GATECFG1/GATECFG2 registers without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 7.5 V to 85 V motor supply - supports wide-range industrial DC bus inputs without external regulation. |
| Microstepping Resolution | Up to 1/16 step - enables smooth low-speed operation and reduced resonance in precision positioning stages. |
| SPI Interface Speed | 5 Mbit/s - allows real-time motion command updates and status polling with minimal latency. |
| Current Control Method | Auto-adaptive decay mode - eliminates manual decay tuning and improves torque consistency across speed range. |
| Protection Features | Non-dissipative overcurrent, thermal shutdown, UVLO, motor stall detection - ensures robust operation in unattended systems. |
| Integrated Regulators | VCC regulator (3.3 V ±5%) and charge pump - powers logic and gate drivers from single motor rail. |
| Package | HTSSOP38 (exposed pad) - provides thermal performance up to 2.5 W dissipation in compact footprint. |
Pinout & Package
HTSSOP38 package with 0.65 mm pitch, 9.7 mm × 4.4 mm body, and exposed thermal pad (EP) for enhanced heat dissipation. Pin 1 marked by dot; pin numbering counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital supply input | 3.3 V logic supply; powers internal registers, SPI interface, and motion engine core. |
| VCC | Internal regulator output | 3.3 V regulated output; powers external logic or feedback circuitry (max 50 mA). |
| VS | Motor power supply input | Main 7.5–85 V rail feeding gate drivers and current sense path; connects to external MOSFET bridges. |
| REFIN | Reference voltage input | Analog reference for current sensing; sets full-scale current threshold via external resistor divider. |
| CS | Current sense input | Differential input for shunt-based phase current measurement; feeds internal ADC for closed-loop regulation. |
| SPI_CLK, SPI_MOSI, SPI_MISO, SPI_CS | SPI interface signals | Standard 4-wire SPI interface operating up to 5 Mbit/s; supports daisy-chaining multiple L6482H devices. |
| STEP, DIR, RESET, BUSY/SYNC, FLAG, SW | Control and status I/O | STEP/DIR support legacy step-clock mode; BUSY indicates motion execution; FLAG signals alarms; SW enables hardware homing/interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Motion Engine Core | Hardware-accelerated trajectory generator executing acceleration, deceleration, and positioning commands without host CPU intervention. |
| Adaptive Decay Control | Real-time selection of fast/slow/mixed decay per microstep based on back-EMF and load - maintains current accuracy at all speeds. |
| Programmable Gate Drivers | Configurable IGATE (1–12 mA), TBOOST (0–2 µs), TDT (25–200 ns), and TBLANK (150–1200 ns) - optimizes switching loss and shoot-through immunity. |
| Integrated Analog Front-End | On-chip 10-bit ADC for VS monitoring, temperature sensing, and external torque regulation via ADC_OUT register. |
| Non-Dissipative Overcurrent Protection | Detects phase overcurrent without shunt resistors or power loss - triggers automatic HiZ state while preserving MOSFET integrity. |
Applications
| 3D Printer Motion Control | CNC Milling Axis Driver |
|---|---|
|
Use Scenario: Precise open-loop positioning of extruder carriage and Z-axis in fused deposition modeling (FDM) printers. IC Role / Device Role / Timing Role: Microstepping controller executing GoTo and Move commands via SPI; manages acceleration profiles and stall detection during layer transitions. Use Value: Eliminates need for external motion controller FPGA/MCU; reduces BOM count and firmware complexity while maintaining sub-10 µm repeatability. |
Use Scenario: Driving X/Y/Z axes of desktop CNC mills requiring smooth low-speed cutting and rapid direction reversal. IC Role / Device Role / Timing Role: Dual full-bridge gate driver with adaptive decay - sustains torque at 100–500 RPM while suppressing vibration-induced resonance. Use Value: Enables 1/16 microstepping without external current DACs or decay tuning components - cuts PCB area by 35% vs discrete driver + MCU solutions. |
| Lab Automation Stage | Medical Imaging Scanner |
|
Use Scenario: Positioning optical encoders and sample trays in automated ELISA readers and spectrophotometers. IC Role / Device Role / Timing Role: Absolute position counter (ABS_POS register) with GoHome/GoMark commands - ensures repeatable zero-reference calibration after power cycle. Use Value: Removes need for homing sensors or mechanical limits; achieves ±1 step accuracy over 10⁶ steps without drift compensation. |
Use Scenario: Controlling gantry movement and detector alignment in portable X-ray and ultrasound imaging systems. IC Role / Device Role / Timing Role: Integrated thermal warning and UVLO_ADC monitoring - prevents motion faults during battery-voltage sag or ambient temperature rise. Use Value: Meets IEC 62304 Class C safety requirements via hardware-enforced fault response (HardStop, thermal shutdown) without software dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC5160-TA | Integrated stepper driver + motion controller in QFN48; supports up to 256 microsteps and spreadCycle™ current control. | Requires external MOSFETs; lacks embedded non-dissipative OCP and charge-pump gate drive. | Preferred for ultra-low-noise applications where external FET selection and advanced quietStep modes are critical. |
| DRV8825PWPR | Simple step/dir stepper driver (no motion engine); fixed 1/32 microstepping; no SPI register interface or position tracking. | No onboard acceleration profiling or absolute position counter; relies entirely on host MCU for motion sequencing. | Selected when cost sensitivity outweighs autonomous motion capability - suitable for basic linear actuators with fixed-speed moves. |
Compared with TMC5160-TA, L6482H offers superior integration of gate drivers and protection in HTSSOP38, while DRV8825PWPR requires full host-level motion planning - making L6482H optimal for space-constrained, self-contained motion modules needing deterministic stall recovery and SPI configurability.
Availability
L6482H is available at Aetrix Electronics and suitable for industrial automation, medical imaging scanners, and lab automation equipment requiring stable component supply and long-term production continuity.
Supply support for L6482H 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 specializing in power management, motion control, and embedded processing solutions for industrial and automotive markets.
The L6482H belongs to ST's dedicated stepper motor controller product line, engineered to replace multi-chip MCU + driver designs with single-chip motion intelligence for compact, reliable, and firmware-light positioning systems.
FAQ
What is the maximum motor supply voltage supported by the L6482H?
The L6482H supports a motor supply (VS) range of 7.5 V to 85 V, verified per Absolute Maximum Ratings Table 2 in the official datasheet (DocID023768 Rev 6). Operation above 85 V risks permanent damage to internal gate drivers and charge pump circuitry.
Does the L6482H require external current-sense resistors?
Yes - the L6482H uses differential CS inputs and requires two external low-value shunt resistors (typically 0.05 Ω–0.1 Ω) placed between each motor phase and ground to enable its predictive current control and auto-decay functionality.
Can the L6482H operate without an external crystal or oscillator?
Yes - the L6482H includes an internal 12 MHz RC oscillator sufficient for basic operation. An external clock (1–16 MHz) may be applied to the OSC_IN pin for improved timing accuracy in synchronized multi-axis systems.
How does the non-dissipative overcurrent protection work?
The L6482H monitors MOSFET VDS during conduction using embedded sense-FETs. When overcurrent is detected, it forces gate drivers into HiZ state without dissipating energy in external components - preserving MOSFET integrity and eliminating need for fuse or polyfuse elements.
L6482H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L64
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (4)
- Interface:
- SPI
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/16
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 3.3V, 5V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-HTSSOP
L6482H FAQ
1.How can I place an order for L6482H through Aetrix?
Please submit a Request for Quotation (RFQ) for L6482H 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 L6482H reliable?
The price and inventory of L6482H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6482H is usually 5 days.
3.What payment methods are accepted for L6482H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6482H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6482H?
L6482H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6482H 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 L6482H?
For technical support, including L6482H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6482H requirements.
6.How does Aetrix verify that L6482H is sourced from the original manufacturer or authorized distributors?
All L6482H 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 L6482H meets industry standards.
7.What is the process for return or replacement of L6482H?
All L6482H units undergo pre-shipment inspection (PSI). If there is an issue with L6482H, 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 L6482H part is unused and in its original packaging.
Return procedure for L6482H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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