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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

STMicroelectronics L6258EXTR

Name: L6258EXTR
Brand: STMicroelectronics
SKU: L6258EXTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6258EXTR

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 36-PowerBSSOP (0.433", 11.00mm Width)

Datasheet:: L6258EXTR.pdf

Description:: IC MOTOR DRIVER BIPLR 36POWERSO

Quantity:: RFQ Add To RFQ list

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Inventory:2,297

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Product details

Overview

L6258EXTR from STMicroelectronics is a dual full-bridge PWM motor driver IC in PowerSO36 package, designed to drive both windings of bipolar stepper motors or two bidirectional DC motors. It delivers up to 1.5A continuous current per bridge, operates from 12V to 40V supply, supports four-quadrant current control, and integrates DMOS power stages with built-in recirculation diodes - enabling microstepping and precision DC motor control in industrial motion systems.

For engineers reviewing the L6258EXTR datasheet, L6258EXTR pinout, L6258EXTR application, or L6258EXTR equivalent, this device is selected for high-efficiency, thermally robust motor control where precise current regulation, TTL/CMOS logic compatibility, cross-conduction protection, and bootstrap gate drive for high-side DMOS are required.

Technical Context

The L6258EXTR implements a transconductance-based PWM current control loop using internal DACs (I0–I3 inputs), triangular waveform generators (TRI_CAP pin), and error amplifiers to regulate motor winding current against a programmable reference (VREF1/VREF2). Current amplitude is set via 4-bit DAC input codes defining 16 discrete levels from 0% to 100% of full-scale current.

Its dual DMOS full-bridge power stage uses phase-shifted PWM to achieve four-quadrant operation: direction is controlled by PH_1/PH_2 inputs, while duty-cycle asymmetry between OUT1A/OUT1B and OUT2A/OUT2B determines current polarity and magnitude. Thermal shutdown triggers at 150°C with 25°C hysteresis, and charge pump circuitry (VCP1/VCP2/VBOOT) enables high-side gate drive without external high-voltage supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current (continuous)	1.5A per bridge - supports sustained torque in stepper windings or DC motor loads without forced cooling.
Supply voltage range (VS)	12V to 40V - compatible with 24V industrial rails and higher-voltage battery-powered motion systems.
PWM chopping frequency	12.5–18.5 kHz (set by TRI_CAP capacitor) - balances EMI suppression and current ripple reduction in microstepping.
Logic supply (VDD)	4.75–5.25V - TTL/CMOS-compatible interface with standard 5V microcontrollers and FPGAs.
Junction temperature limit	150°C with 25°C hysteresis - thermal shutdown protects against overload or poor PCB heatsinking.
Sense resistor full-scale voltage	1.25V - sets maximum current as I_MAX = 0.5 × VREF / R_S; enables accurate current scaling with standard 0.1Ω–0.5Ω shunts.
On-resistance (R_DS(on))	0.6–0.75Ω per DMOS switch - limits conduction loss to ≤1.7W per bridge at 1.5A, supporting compact thermal design.

Pinout & Package

Package: PowerSO36 - thermally enhanced exposed-pad surface-mount package with integrated heat transfer path via PWR_GND pins (1, 18, 19, 36) to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
OUT1A / OUT1B / OUT2A / OUT2B	Bridge output terminals	Drive motor windings in H-bridge configuration; each pair forms one full bridge capable of bidirectional current flow.
PH_1 / PH_2	Direction control inputs	TTL-compatible logic inputs determining current direction: high = current flows OUTxA → OUTxB.
I0_1–I3_1 / I0_2–I3_2	DAC address inputs	4-bit parallel code selects one of 16 current levels (0–100% of full scale) per bridge independently.
VREF1 / VREF2	Current reference voltage inputs	Set full-scale current threshold; 2.5V nominal reference defines I_MAX = 0.5 × VREF / R_S.
DISABLE	Global bridge enable	Active-low input that disables both bridges simultaneously for safe startup/shutdown sequencing.
VBOOT / VCP1 / VCP2	Charge pump interface	Generates >Vs gate drive for high-side DMOS; requires external 10nF (CP) and 100nF (Cboot) capacitors.
SENSE1 / SENSE2	Current sense amplifier inputs	Differential inputs connected across external sense resistors to close the PWM current control loop.

Key Features

Feature	Design Value
Integrated recirculation diodes	Eliminates need for 8 external flyback diodes - reduces BOM count and PCB area in dual-H-bridge designs.
Phase-shift PWM microstepping	Enables smooth 4-bit (16-level) microstepping via independent DAC control of each bridge's current amplitude.
Cross-conduction protection	Hardware logic prevents shoot-through during switching transitions - ensures robust operation under fast direction changes.
Thermal shutdown with hysteresis	Auto-recovery after cooldown (125°C restart threshold) - maintains system uptime during transient overloads.
Bootstrap gate drive	Self-contained charge pump eliminates need for isolated high-voltage supply - simplifies power architecture.

Applications

Industrial CNC Positioning

Automated Valve Actuation

Use Scenario: Precise open-loop positioning of stepper-driven linear actuators in CNC milling feed axes.

IC Role / Device Role / Timing Role: Dual full-bridge current controller providing synchronized 16-level microstepping to two motor windings with real-time current feedback.

Use Value: Reduces step vibration and resonance via low-ripple PWM chopping (12.5–18.5 kHz), improving surface finish accuracy and mechanical lifetime.

Use Scenario: Bidirectional control of 24V DC gearmotor actuators regulating HVAC damper position in building management systems.

IC Role / Device Role / Timing Role: Dual H-bridge driver executing forward/reverse commands with programmable current limiting to prevent stalling damage.

Use Value: Enables stall detection and soft-start via adjustable current thresholds (0–100% I_MAX), extending actuator service life.

Lab Automation Robotics

Medical Infusion Pump Drive

Use Scenario: Coordinated motion of multi-axis robotic arms in automated sample handling platforms.

IC Role / Device Role / Timing Role: Dual motor driver implementing independent current profiles per joint using PH and DAC inputs for torque modulation.

Use Value: Supports dynamic load compensation through real-time current loop response (<400 kHz GBW), minimizing positional lag during acceleration.

Use Scenario: Silent, low-vibration peristaltic pump motor control in portable infusion devices requiring precise flow rate regulation.

IC Role / Device Role / Timing Role: Microstepping-capable driver delivering smooth 1/16-step resolution with <1.5A peak current for quiet operation.

Use Value: Achieves sub-mL/h flow accuracy via 16-level current granularity and <1.25V sense threshold, meeting IEC 60601 safety margins.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual full-bridge motor driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB6600HG	Higher 4.5A rating but requires external recirculation diodes and separate high-side gate supply.	Better suited for high-torque stepper systems (>2A); lacks integrated charge pump and DAC-based microstepping.	Select when peak current >2A is required and board space allows discrete high-voltage support components.
DRV8825	Lower 2.2A rating, 3.3V/5V logic, integrated indexer, but only single-channel per package.	Requires two ICs for dual-motor control; optimized for compact 3D printer stepper drivers, not industrial DC motors.	Prefer for cost-sensitive, space-constrained consumer-grade stepper systems with onboard step/direction logic.

Compared with TB6600HG and DRV8825, the L6258EXTR uniquely combines dual-channel 1.5A drive, integrated charge pump, on-chip DAC microstepping, and recirculation diodes in a single PowerSO36 package - making it optimal for industrial motion control where reliability, thermal performance, and component count reduction are critical.

Availability

L6258EXTR is available at Aetrix Electronics and suitable for industrial CNC positioning, automated valve actuation, and lab automation robotics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for L6258EXTR 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 automotive-grade ICs with vertical manufacturing capability.

The L6258EXTR belongs to ST's high-current motor driver product line, engineered for industrial and medical motion systems demanding robust thermal performance, integrated protection, and precise current regulation without external support components.

FAQ

What is the maximum continuous output current per bridge of the L6258EXTR?

The L6258EXTR delivers 1.5A continuous current per full-bridge channel under typical thermal conditions (T_j ≤ 125°C, 4-layer PCB with ground planes). Peak current reaches 2A for ≤1 second. Actual current depends on PCB copper area, ambient temperature, and heatsinking - thermal resistance θ_JA ranges from 15°C/W (optimized layout) to 35°C/W (minimal copper).

How does the L6258EXTR implement microstepping without an external indexer?

The L6258EXTR uses its internal 4-bit DAC (controlled by I0–I3 inputs) to generate 16 discrete current levels per winding, combined with PH input for polarity control. This enables hardware-based microstepping - no external step/direction signals or microcontroller firmware interpolation is needed. The current control loop automatically adjusts PWM duty cycle to match DAC-set reference voltage.

Can the L6258EXTR drive unipolar stepper motors?

No - the L6258EXTR is designed exclusively for bipolar stepper motors (requiring full-bridge current reversal per winding) and bidirectional DC motors. Unipolar steppers use center-tapped windings and require different drive topologies (e.g., single-pole switching), which this IC does not support.

What external components are mandatory for basic L6258EXTR operation?

Mandatory components include: two 100nF Cboot capacitors (pins VCP1/VCP2), one 10nF CP capacitor (pin VCP1), one 1nF TRI_CAP capacitor (pin TRI_CAP), two sense resistors (Rs1/Rs2) sized per desired I_MAX, and decoupling capacitors on VDD and VS. The VREF1/VREF2 pins require stable 2.5V references - typically derived from internal bandgap or external precision source.

L6258EXTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBSSOP (0.433", 11.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Motor Type - Stepper:: Bipolar

Motor Type - AC, DC:: Brushed DC

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (4)

Interface:: Parallel

Technology:: DMOS

Step Resolution:: 1, 1/2, 1/4, 1/8, 1/16

Applications:: General Purpose

Current - Output:: 1.2A

Voltage - Supply:: 4.75V ~ 5.25V

Voltage - Load:: 12V ~ 40V

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-36, Bottom Pad

L6258EXTR FAQ

1.How can I place an order for L6258EXTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6258EXTR 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 L6258EXTR reliable?

The price and inventory of L6258EXTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6258EXTR is usually 5 days.

3.What payment methods are accepted for L6258EXTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6258EXTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6258EXTR?

L6258EXTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6258EXTR 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 L6258EXTR?

For technical support, including L6258EXTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6258EXTR requirements.

6.How does Aetrix verify that L6258EXTR is sourced from the original manufacturer or authorized distributors?

All L6258EXTR 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 L6258EXTR meets industry standards.

7.What is the process for return or replacement of L6258EXTR?

All L6258EXTR units undergo pre-shipment inspection (PSI). If there is an issue with L6258EXTR, 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 L6258EXTR part is unused and in its original packaging.

Return procedure for L6258EXTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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