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

STMicroelectronics L6226D

Name: L6226D
Brand: STMicroelectronics
SKU: L6226D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6226D

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: L6226D.pdf

Description:: IC MTR DRVR BIPOLAR 8-52V 24SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:552

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Product details

Overview

L6226D from STMicroelectronics is a DMOS dual full-bridge motor driver IC designed for bipolar stepper and dual/quad DC motor control, featuring 8–52 V operating supply, 2.8 A peak output current per bridge, 0.73 Ω typical R_DS(on) at 25 °C, programmable high-side overcurrent detection, and integrated fast freewheeling diodes.

For engineers reviewing the L6226D datasheet, L6226D pinout, L6226D application, or L6226D equivalent, this device supports precise current-limited H-bridge operation in motion control systems requiring thermal shutdown, cross-conduction protection, diagnostic feedback, and paralleled bridge configurations.

Technical Context

The L6226D integrates two independent N-channel DMOS full bridges with bootstrap gate drive (V_BOOT, V_CP oscillator @ 0.6 MHz) enabling high-side switching above VS. Each bridge includes non-dissipative high-side overcurrent sensing via PROGCLA/PROGCLB pins and open-drain diagnostic outputs (OCDA/OCDB) tied to internal comparators with ±30% threshold tolerance.

Logic inputs (IN1A/IN2A/ENA and IN1B/IN2B/ENB) are TTL/CMOS compatible with 1.8 V turn-on and 1.3 V turn-off thresholds, hysteresis of 0.5 V, and dead time of 1 µs. Thermal shutdown activates at 165 °C (15 °C hysteresis), and undervoltage lockout operates below 5.5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	8–52 V - supports wide-input industrial and automotive battery-fed motor drives without external regulation.
Peak output current	2.8 A per bridge - enables driving 1.4 A RMS stepper or DC motors with short-duration torque bursts.
R_DS(on) (HS + LS)	1.47 Ω typ. at 25 °C - determines conduction loss and thermal rise under continuous load; increases to 2.7 Ω at 125 °C.
Overcurrent threshold	Programmable from 0.29 A to 2.8 A via external resistor - eliminates need for external sense resistors and associated power dissipation.
Switching frequency	Up to 100 kHz - allows high-resolution PWM control and reduced audible noise in stepper microstepping.
Thermal shutdown	165 °C junction temperature with 15 °C hysteresis - prevents permanent damage during overload or poor heatsinking.
Diagnostic output	Open-drain OCDA/OCDB - sinks 4 mA to GND on fault, enabling direct EN pin feedback for auto-recovery or system-level fault logging.

Pinout & Package

Available in PowerSO36 (exposed slug, R_th-j-case = 2 °C/W) and SO24 (20+2+2 pin count) packages. Both use multipower-BCD technology and share identical pin functions with layout differences only in pin numbering and thermal pad configuration.

Pin/Terminal	Circuit Role	Design Meaning
VSA / VSB	Bridge A/B power supply input	Must be connected together to main supply rail; each supplies one full bridge independently.
OUT1A / OUT2A / OUT1B / OUT2B	Power output terminals	Drive motor windings directly; support bidirectional current flow with integrated freewheeling diodes.
SENSEA / SENSEB	High-side current sense reference	Internally connected to source of upper MOSFETs; must tie to power ground via shortest possible PCB trace.
OCDA / OCDB	Fault indicator outputs	Open-drain signals pulled low during overcurrent or thermal shutdown; used for EN feedback or MCU interrupt.
PROGCLA / PROGCLB	Overcurrent threshold programming	Resistor-to-GND sets Isover per bridge; 0 Ω = 2.8 A max; 5 kΩ = ~2.2 A; 39 kΩ = ~0.29 A.
ENA / ENB	Bridge enable inputs	Active-high logic; low disables all MOSFETs in respective bridge; recommended pull-up to 5 V if unused.
V_BOOT	Bootstrap supply voltage	Drives high-side gates above VS; requires external 220 nF capacitor and charge pump diodes (1N4148).

Key Features

Feature	Design Value
Non-dissipative overcurrent detection	Eliminates external shunt resistors and associated 1–2 W losses in high-current motor phases.
Paralleled bridge operation	Enables current sharing between Bridge A and B halves to double effective output capability while retaining independent diagnostics.
Cross-conduction protection	1 µs hardware-enforced dead time prevents shoot-through during PWM transitions, improving reliability.
Integrated charge pump	On-chip 0.6 MHz oscillator (V_CP) with external 10 nF capacitor simplifies high-side gate drive design.
Thermal shutdown with hysteresis	165 °C trip point + 15 °C hysteresis ensures safe cooldown before automatic recovery, avoiding thermal cycling stress.

Applications

Bipolar Stepper Motor Control

Dual DC Motor Drive

Use Scenario: Precision open-loop positioning in CNC stages, 3D printer X/Y/Z axes, and automated lab equipment.

IC Role / Device Role / Timing Role: Dual full-bridge driver delivering phase-coordinated current to two windings with microstep-compatible PWM timing.

Use Value: Programmable overcurrent threshold protects windings during stall conditions without sacrificing torque resolution.

Use Scenario: Independent forward/reverse control of two brushed DC motors in robotic arms or conveyor modules.

IC Role / Device Role / Timing Role: Simultaneous bidirectional drive with EN-controlled enable/disable sequencing and synchronized fault reporting.

Use Value: OCDA/OCDB diagnostic outputs allow real-time motor stall detection and coordinated shutdown across both channels.

Quad DC Motor Control

Industrial Valve Actuation

Use Scenario: Four independent low-voltage DC actuators in HVAC damper banks or modular test fixtures.

IC Role / Device Role / Timing Role: Two L6226D devices configured in master-slave mode, with paralleled half-bridges to drive four loads.

Use Value: Shared V_BOOT and V_CP resources reduce external component count versus discrete driver solutions.

Use Scenario: Fail-safe linear actuation of pneumatic or hydraulic valves in process control systems.

IC Role / Device Role / Timing Role: High-reliability H-bridge interface with thermal and overcurrent fault latching via EN-OCD feedback loop.

Use Value: 52 V max supply rating accommodates 48 V industrial bus rails; exposed slug enhances long-term thermal stability.

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
TB6612FNG	Lower 1.2 A continuous current, no programmable OCD, smaller SOIC-24 package, no bootstrap circuit required.	Better suited for low-power robotics and battery-operated devices; lacks thermal shutdown hysteresis and paralleling support.	Select when board space and supply simplicity outweigh current headroom and industrial fault robustness.
VNH7040AS	Single-channel high-side/low-side driver with 40 mΩ R_DS(on), SPI-configurable protection, no integrated freewheeling diodes.	Requires external diodes and dual ICs for full-bridge function; targets high-efficiency automotive body control modules.	Choose for automotive ASIL-B designs needing diagnostic coverage and lower conduction loss, accepting higher BOM complexity.

Compared with TB6612FNG and VNH7040AS, the L6226D uniquely combines dual full-bridge integration, programmable overcurrent detection without external shunts, and paralleling capability-making it optimal for industrial stepper and multi-motor DC systems where thermal resilience and fault transparency are critical.

Availability

L6226D is available at Aetrix Electronics and suitable for bipolar stepper motor control, dual/quad DC motor drive, and industrial valve actuation requiring stable component supply across extended temperature and voltage ranges.

Supply support for L6226D 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, automotive, and consumer markets.

The L6226D belongs to ST's Power MOSFET Driver product line, engineered specifically for robust, high-voltage motor control applications demanding integrated protection, thermal resilience, and simplified PCB layout.

FAQ

What is the maximum allowable supply voltage for continuous operation?

The L6226D supports continuous operation up to 52 V per bridge (VSA/VSB), with absolute maximum rating of 60 V. Exceeding 52 V risks violating recommended operating conditions and may trigger undervoltage lockout or thermal instability, especially under high ambient temperatures or poor PCB heatsinking.

How does the non-dissipative overcurrent detection work without a sense resistor?

The L6226D uses an internal current mirror on each high-side DMOS transistor to extract a precise fraction (~1/200) of the output current. This mirrored current is compared against an internal reference; no external resistor is needed, eliminating up to 2 W of heat generation and PCB area typically required by shunt-based solutions.

Can L6226D drive a unipolar stepper motor?

No-the L6226D is designed exclusively for bipolar stepper motors and dual/quad DC motors. Its dual full-bridge topology provides bidirectional current control per winding, which unipolar steppers do not require; using it for unipolar operation would waste channel resources and complicate control logic unnecessarily.

What is the minimum recommended value for C_EN when implementing OCD-to-EN feedback?

The minimum recommended C_EN is 1 nF for noise immunity, but ST specifies 5.6 nF as optimal for achieving ~200 µs disable time with 100 kΩ R_EN. Values below 2.2 nF risk insufficient filtering against fast transients, potentially causing false shutdowns during ESD or switching noise events.

L6226D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STSPIN L62

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

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:: -

Applications:: General Purpose

Current - Output:: 1.4A

Voltage - Supply:: 8V ~ 52V

Voltage - Load:: 8V ~ 52V

Operating Temperature:: -25°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SOIC

L6226D FAQ

1.How can I place an order for L6226D through Aetrix?

Please submit a Request for Quotation (RFQ) for L6226D 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 L6226D reliable?

The price and inventory of L6226D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6226D is usually 5 days.

3.What payment methods are accepted for L6226D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6226D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6226D?

L6226D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6226D 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 L6226D?

For technical support, including L6226D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6226D requirements.

6.How does Aetrix verify that L6226D is sourced from the original manufacturer or authorized distributors?

All L6226D 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 L6226D meets industry standards.

7.What is the process for return or replacement of L6226D?

All L6226D units undergo pre-shipment inspection (PSI). If there is an issue with L6226D, 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 L6226D part is unused and in its original packaging.

Return procedure for L6226D:

1.Submit a request within 90 days.

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

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