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

STMicroelectronics L6226PDTR

Name: L6226PDTR
Brand: STMicroelectronics
SKU: L6226PDTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6226PDTR

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

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

Datasheet:: L6226PDTR.pdf

Description:: IC MTR DRV BIPOLAR 8-52V 36PWRSO

Quantity:: RFQ Add To RFQ list

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Inventory:1,187

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Product details

Overview

L6226PDTR 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 L6226PDTR datasheet, L6226PDTR pinout, L6226PDTR application, or L6226PDTR equivalent, this device supports precise current-limited H-bridge operation in industrial motion control, robotics, and automated equipment where thermal shutdown, cross-conduction protection, and diagnostic feedback are critical.

Technical Context

The L6226PDTR integrates two independent N-channel DMOS full bridges with bootstrap gate drivers enabling high-side switching up to 52 V. Each bridge includes non-dissipative high-side current sensing, dead-time control (0.5–1 µs), and open-drain diagnostic outputs (OCDA/OCDB) tied to thermal and overcurrent events.

Its multipower-BCD process combines isolated power transistors with CMOS/bipolar logic, supporting TTL/CMOS-compatible inputs (V_IL ≤ 0.8 V, V_IH ≥ 2 V), programmable current limit via external resistors (PROGCLA/PROGCLB), and charge pump operation at 0.6 MHz typical frequency for V_BOOT generation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	8–52 V - Enables direct integration into 12 V, 24 V, and 48 V industrial motor systems without external regulation.
Peak output current	2.8 A per bridge - Supports dynamic torque delivery in stepper motors and high-inertia DC loads.
R_DS(on) (HS + LS)	1.47 Ω typ. at 25 °C - Limits conduction loss to <1.15 W per bridge at 1.4 A DC, easing thermal design.
Switching frequency	Up to 100 kHz - Allows fine-grained PWM resolution for smooth microstepping and low-acoustic operation.
Overcurrent threshold	Programmable from 0.29 A to 2.8 A ±30% - Set via external resistor (5–39 kΩ) for load-specific fault margin.
Thermal shutdown	165 °C junction temp with 15 °C hysteresis - Prevents irreversible die damage during sustained overload or poor heatsinking.
Diagnostic output	Open-drain OCDA/OCDB - Pulls low on overcurrent or thermal fault, enabling immediate MCU interrupt or hardware latch.

Pinout & Package

Available in PowerSO-36 package (exposed slug thermally connected to GND pins 1, 18, 19, 36); 36-pin layout optimized for high-current routing and PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VSA / VSB	Bridge A/B power supply input	Must be tied together externally 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 internal freewheeling diodes.
SENSEA / SENSEB	High-side current sense reference	Connected to power ground via low-inductance path; enables non-dissipative overcurrent detection.
OCDA / OCDB	Open-drain fault indicator	Pulls low on overcurrent or thermal event; requires external pull-up for MCU-level interrupt signaling.
PROGCLA / PROGCLB	Current limit programming input	Resistor-to-GND sets Isover threshold; floating not allowed-must be terminated to define protection level.
ENA / ENB	Bridge enable control	Active-high logic input; if unused, must be tied to +5 V to prevent unintended disable.
VBOOT	Bootstrap supply for high-side gates	Driven by internal charge pump (VCP oscillator); requires external 220 nF boot capacitor.

Key Features

Feature	Design Value
Non-dissipative overcurrent detection	Eliminates external shunt resistor and associated I²R loss, reducing board area and thermal burden.
Programmable current limit per bridge	Two independent PROGCL pins allow asymmetric current settings for mismatched motor phases or dual-load systems.
Cross-conduction protection	Hardware-enforced 0.5–1 µs dead time prevents shoot-through during PWM transitions, ensuring safe commutation.
Integrated charge pump	On-chip 0.6 MHz oscillator (VCP pin) drives external bootstrap circuit, removing need for external clock source.
Thermal shutdown with hysteresis	165 °C trip point + 15 °C hysteresis avoids oscillatory shutdown/restart during transient overheating.

Applications

Bipolar Stepper Motor Control

Dual DC Motor Positioning

Use Scenario: Driving NEMA 17–23 stepper motors in CNC routers and 3D printers using microstepping PWM.

IC Role / Device Role / Timing Role: Dual full-bridge driver executing phase-commutated current waveforms with real-time overcurrent fault response.

Use Value: Programmable Isover ensures stall detection without external sensing, while 100 kHz switching enables quiet 1/16-step resolution.

Use Scenario: Independent forward/reverse control of two brushed DC motors in robotic arm joints.

IC Role / Device Role / Timing Role: Dual H-bridge providing bidirectional torque control with synchronized ENA/ENB enable sequencing.

Use Value: Separate OCDA/OCDB outputs allow per-motor fault isolation, preventing system-wide shutdown during single-axis overload.

Industrial Conveyor Belt Drive

Automated Gate Actuator

Use Scenario: Controlling dual 24 V DC conveyor motors requiring synchronized start/stop and jam detection.

IC Role / Device Role / Timing Role: High-voltage motor interface with undervoltage lockout and thermal monitoring for continuous-duty operation.

Use Value: 52 V max supply headroom accommodates line surges; R_DS(on) stability up to 125 °C ensures reliability in enclosed enclosures.

Use Scenario: Bidirectional actuation of heavy-duty sliding gates in access control systems with soft-start and end-stop sensing.

IC Role / Device Role / Timing Role: Robust bridge driver handling inrush current and mechanical stall conditions with automatic current foldback.

Use Value: Non-dissipative OCD eliminates shunt calibration drift, maintaining consistent stall threshold across temperature and lifetime.

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 voltage (13.5 V max), lower peak current (3.2 A), no programmable OCD, smaller SOIC-24 package.	Suited for low-voltage robotics but lacks 48 V capability and thermal robustness for industrial use.	Select when board space is constrained and supply stays ≤12 V; avoid for 24/48 V motor systems.
VNH7040AS	Single-channel high-side driver (not dual full-bridge), 41 V max, integrated current sense amplifier output.	Requires external H-bridge topology; better for safety-critical automotive loads than integrated stepper control.	Choose only for single-load high-side switching with analog current monitoring-not as a drop-in L6226 replacement.

Compared with TB6612FNG and VNH7040AS, the L6226PDTR uniquely delivers dual full-bridge operation at up to 52 V with programmable, non-dissipative overcurrent protection-making it the only option among the three qualified for industrial bipolar stepper and dual DC motor systems requiring both voltage headroom and fault intelligence.

Availability

L6226PDTR is available at Aetrix Electronics and suitable for industrial motion control, robotics actuation, and automated gate systems requiring stable component supply and long-term production continuity.

Supply support for L6226PDTR 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, motor control, and automotive-grade ICs, with manufacturing aligned to ISO 9001 and AEC-Q100 standards.

The L6226PDTR belongs to ST's Power Switches & Motor Drivers product line, engineered specifically for high-reliability industrial motor control where thermal resilience, integrated diagnostics, and wide supply range are mandatory.

FAQ

What is the maximum allowable supply voltage for L6226PDTR?

The absolute maximum supply voltage is 60 V, but the recommended operating range is 8–52 V per VS pin (VSA and VSB). Exceeding 52 V risks violating safe operating area limits under load, especially at elevated temperatures. The 60 V rating applies only to short-duration transients with strict duty cycle limits defined in Section 1.1 of the datasheet.

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

The L6226PDTR 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 sense resistor is needed, eliminating I²R loss, board space, and calibration drift-verified in Section 4.3 and Figure 9 of the datasheet.

Can L6226PDTR drive a unipolar stepper motor?

No-it is designed exclusively for bipolar stepper motors and dual/quad DC motors. Unipolar steppers require center-tapped windings and separate phase switching, which the L6226PDTR's dual full-bridge topology cannot support. Its truth table (Table 7) confirms only H-bridge mode operation with four-quadrant current control.

What thermal management is required for continuous 1.4 A DC operation?

At 1.4 A DC and 25 °C ambient, the PowerSO-36 package requires a minimum 400 mm² copper pour (2 oz) connected to the exposed slug (pins 1/18/19/36) to maintain T_j < 125 °C. With no heatsink, R_th-j-amb is 16 °C/W (Table 3), resulting in ~23 °C rise-well within limits. For 48 V operation, verify PCB layout per Section 7 of the datasheet.

L6226PDTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STSPIN L62

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

Packaging:: Tape & Reel (TR)

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:: BiCDMOS

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:: PowerSO-36 Slug Up

L6226PDTR FAQ

1.How can I place an order for L6226PDTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6226PDTR 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 L6226PDTR reliable?

The price and inventory of L6226PDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6226PDTR is usually 5 days.

3.What payment methods are accepted for L6226PDTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6226PDTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6226PDTR?

L6226PDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6226PDTR 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 L6226PDTR?

For technical support, including L6226PDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6226PDTR requirements.

6.How does Aetrix verify that L6226PDTR is sourced from the original manufacturer or authorized distributors?

All L6226PDTR 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 L6226PDTR meets industry standards.

7.What is the process for return or replacement of L6226PDTR?

All L6226PDTR units undergo pre-shipment inspection (PSI). If there is an issue with L6226PDTR, 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 L6226PDTR part is unused and in its original packaging.

Return procedure for L6226PDTR:

1.Submit a request within 90 days.

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

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