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

STMicroelectronics L6226PD

Name: L6226PD
Brand: STMicroelectronics
SKU: L6226PD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6226PD

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

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

Datasheet:: L6226PD.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6226PD 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 L6226PD datasheet, L6226PD pinout, L6226PD application, or L6226PD 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 L6226PD integrates two independent full-bridge power stages using multipower-BCD technology, each with matched N-channel high-side and low-side DMOS transistors. It employs a charge-pump-based bootstrap circuit (VCP = 600 kHz typ., VBOOT = VS + 10 V) to drive upper MOSFETs and implements non-dissipative high-side current sensing via internal current mirrors.

Logic inputs (IN1A/IN2A/IN1B/IN2B, ENA/ENB) are TTL/CMOS compatible with 1.8 V turn-on threshold and 0.5 V hysteresis; overcurrent detection triggers open-drain OCDA/OCDB outputs with 200 ns turn-on delay, enabling direct feedback to enable pins for auto-recovery current limiting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	8–52 V - Supports wide-input industrial and automotive battery-powered motor drives without external regulation.
Peak output current	2.8 A per bridge - Enables driving 1.4 A RMS bipolar stepper coils or dual 2.8 A DC motors in PWM mode.
R_DS(on) (HS+LS)	1.47 Ω typ. at 25 °C - Limits conduction loss to ≤2.9 W per bridge at 1.4 A DC, critical for thermal management.
Switching frequency	Up to 100 kHz - Allows high-resolution microstepping and fast transient response in closed-loop motion control.
Overcurrent threshold	Programmable from 0.29 A to 2.8 A via PROGCLA/PROGCLB resistors - Eliminates external sense resistors and associated power loss.
Thermal shutdown	165 °C junction temperature with 15 °C hysteresis - Prevents permanent damage during stall or overload conditions.
Diagnostic output	Open-drain OCDA/OCDB with 4 mA sink capability - Provides fault signaling for system-level error handling and recovery sequencing.

Pinout & Package

Available in PowerSO36 (exposed slug, R_th-j-case = 2 °C/W) and SO24 (20+2+2 pin count) packages. The PowerSO36 variant provides superior thermal performance for high-current applications.

Pin/Terminal	Circuit Role	Design Meaning
IN1A, IN2A, IN1B, IN2B	Bridge logic input	Determines H-bridge output state (HIZ, GND, VS) per truth table; TTL/CMOS compatible with 0.8–2.0 V thresholds.
ENA, ENB	Bridge enable	Active-high control; LOW disables all MOSFETs in respective bridge; used with OCDA/OCDB for auto-shutdown recovery.
VSA, VSB	Bridge power supply	Must be tied together externally; supplies both bridges; requires local 100–200 nF ceramic decoupling.
OUT1A, OUT2A, OUT1B, OUT2B	Power output	DMOS drain terminals; drive motor windings directly; support paralleling of half-bridges across A/B for current sharing.
SENSEA, SENSEB	High-side current sense source	Internally connected to high-side MOSFET sources; must connect to power ground via shortest possible trace to minimize noise.
OCDA, OCDB	Fault diagnostic output	Open-drain outputs pulled low during overcurrent or thermal fault; used to disable ENA/ENB or trigger MCU interrupt.
PROGCLA, PROGCLB	Current limit programming	Resistor-to-ground sets overcurrent threshold; 0 Ω = 2.8 A max; 5 kΩ = ~2.2 A; 39 kΩ = ~0.29 A.
VBOOT, VCP	Bootstrap supply	VCP (600 kHz square wave) charges external CBOOT to generate VBOOT ≥ VS + 10 V for high-side gate drive.

Key Features

Feature	Design Value
Non-dissipative high-side overcurrent detection	Replaces external shunt resistors; reduces PCB area, BOM cost, and power loss while maintaining ±30% current threshold accuracy.
Integrated charge pump with VCP oscillator	Eliminates need for external high-voltage gate driver ICs; enables single-supply operation up to 52 V with robust high-side drive.
Cross-conduction protection	1 µs typical dead time prevents shoot-through during switching transitions, ensuring safe commutation in brushed/stepper motors.
Paralleled bridge operation support	Enables current doubling by connecting OUT1A↔OUT1B and OUT2A↔OUT2B; maintains independent overcurrent monitoring per bridge.
Thermal shutdown with hysteresis	165 °C trip point + 15 °C hysteresis ensures reliable recovery after cooling, preventing thermal cycling damage in enclosed systems.

Applications

Bipolar Stepper Motor Control

Dual DC Motor Drive

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

IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepping sequences via IN1/IN2 logic; VCP synchronizes bootstrap timing with PWM clock.

Use Value: Programmable current limit (via PROGCLA/B) enables torque optimization per axis without hardware changes; diagnostic OCDA/B signals stall events to host controller.

Use Scenario: Independent bidirectional control of conveyor belts and robotic joint actuators in factory automation.

IC Role / Device Role / Timing Role: Two isolated H-bridges delivering 2.8 A peak to separate 12–48 V DC motors; ENA/ENB enable synchronized start/stop and emergency stop.

Use Value: Thermal shutdown and overcurrent protection eliminate need for external fuses or current monitors, reducing system-level safety certification effort.

Quad DC Motor Control

Industrial Valve Actuation

Use Scenario: Simultaneous control of four small DC motors in agricultural sprayers or HVAC damper arrays.

IC Role / Device Role / Timing Role: Paralleled half-bridges (OUT1A+OUT1B, OUT2A+OUT2B) deliver up to 5.6 A peak per motor pair; shared VSA/VSB simplifies power routing.

Use Value: Single-chip dual-bridge architecture cuts component count vs. discrete MOSFET solutions; PowerSO36 package sustains 1.4 A continuous per bridge at 70 °C ambient.

Use Scenario: Fail-safe position holding and modulated flow control in pneumatic/hydraulic valve manifolds.

IC Role / Device Role / Timing Role: High-side current sensing detects coil short/open faults; OCDA/B outputs feed PLC diagnostics; undervoltage lockout prevents erratic actuation below 8 V.

Use Value: Integrated freewheeling diodes suppress inductive kickback without external components; R_DS(on) stability over temperature ensures consistent valve response across -40 to 125 °C.

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 peak current, 4.5–13.5 V supply range, no programmable OCD, smaller SSOP24 package.	Suited for low-voltage robotics but lacks 52 V capability and thermal robustness for industrial solenoids.	Select when board space and cost are prioritized over voltage/current headroom and diagnostic depth.
VNHD7008AY	Single full-bridge, 5.6 A peak, SPI-configurable, integrated current sense amplifier, larger HTSSOP20 package.	Requires two ICs for dual-bridge function; offers digital diagnostics but higher design complexity and BOM count.	Select when precise current measurement and firmware-controlled protection are required over analog simplicity.

Compared with TB6612FNG, L6226PD delivers 2.3× higher peak current and 4× wider supply range; versus VNHD7008AY, it integrates dual bridges with analog OCD in one die, reducing layout area and eliminating SPI interface overhead.

Availability

L6226PD is available at Aetrix Electronics and suitable for industrial motor control, precision motion systems, and embedded actuation requiring stable component supply across extended temperature and voltage ranges.

Supply support for L6226PD 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 automotive-grade ICs, with manufacturing facilities certified to ISO 9001 and IATF 16949 standards.

The L6226PD belongs to ST's high-voltage motor driver product line, engineered for rugged industrial and automotive motion applications where reliability, thermal resilience, and integrated protection are critical.

FAQ

What is the maximum continuous output current per bridge for L6226PD?

The L6226PD supports 1.4 A RMS continuous output current per bridge under recommended thermal conditions (e.g., PowerSO36 on 4-layer PCB with 20 cm² copper pour). Peak current reaches 2.8 A for <1 ms pulses. Actual sustained current depends on ambient temperature, heatsinking, and switching frequency-derating is required above 70 °C ambient.

How does the programmable overcurrent detection work without an external sense resistor?

The L6226PD uses internal current-mirror circuitry tied to the high-side DMOS sources (SENSEA/SENSEB), extracting a precise fraction of load current for comparison against an internal reference. This eliminates external shunts while maintaining ±30% threshold accuracy across -25 to 125 °C, with PROGCLA/B resistors setting the trip point from 0.29 A to 2.8 A.

Can L6226PD drive a unipolar stepper motor?

No-L6226PD is optimized for bipolar stepper motors and dual/quad DC motors. Its dual full-bridge topology provides four quadrant control (forward/reverse/brake/coast) per winding, which is incompatible with unipolar stepper's center-tapped coil configuration requiring only single-ended switching per phase.

What is the purpose of the VCP pin and how is it used in the charge pump circuit?

VCP is the internal charge pump oscillator output (600 kHz typ., 10 V amplitude) that drives an external bootstrap network (CBOOT, CP, D1, D2) to generate VBOOT ≥ VS + 10 V. This elevated voltage enables full enhancement of the high-side N-channel MOSFETs, ensuring low R_DS(on) and efficient switching across the full 8–52 V supply range.

L6226PD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STSPIN L62

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

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 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

L6226PD FAQ

1.How can I place an order for L6226PD through Aetrix?

Please submit a Request for Quotation (RFQ) for L6226PD 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 L6226PD reliable?

The price and inventory of L6226PD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6226PD is usually 5 days.

3.What payment methods are accepted for L6226PD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6226PD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6226PD?

L6226PD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6226PD 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 L6226PD?

For technical support, including L6226PD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6226PD requirements.

6.How does Aetrix verify that L6226PD is sourced from the original manufacturer or authorized distributors?

All L6226PD 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 L6226PD meets industry standards.

7.What is the process for return or replacement of L6226PD?

All L6226PD units undergo pre-shipment inspection (PSI). If there is an issue with L6226PD, 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 L6226PD part is unused and in its original packaging.

Return procedure for L6226PD:

1.Submit a request within 90 days.

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

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