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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics L6206QTR

Name: L6206QTR
Brand: STMicroelectronics
SKU: L6206QTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6206QTR

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 48-VFQFN Exposed Pad

Datasheet:: L6206QTR.pdf

Description:: IC HALF BRIDGE DRV 2.5A 48VFQFPN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6206QTR 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 supply range, 5.6 A peak output current per bridge, 0.34 Ω typical high-side R_DS(on) at 25 °C, 100 kHz max switching frequency, and integrated non-dissipative high-side overcurrent detection with programmable threshold via external resistors.

For engineers reviewing the L6206QTR datasheet, L6206QTR pinout, L6206QTR application, or L6206QTR equivalent, this page delivers verified technical context on dual-bridge gate drive architecture, thermal shutdown (165 °C), cross-conduction protection, diagnostic open-drain outputs (OCDA/OCDB), and VFQFPN48 package layout constraints for motor control PCB design.

Technical Context

The L6206QTR integrates two independent full-bridge power stages using BCDmultipower technology, each with matched N-channel high-side and low-side DMOS transistors (R_DS(on) = 0.34 Ω / 0.28 Ω typ. at 25 °C) and intrinsic fast freewheeling diodes. It employs an internal charge pump (600 kHz, 10 V amplitude at VCP) to generate bootstrap voltage (VBOOT) for high-side gate drive.

Logic inputs (IN1A/IN2A/IN1B/IN2B, ENA/ENB) are TTL/CMOS-compatible with 1.8 V turn-on and 1.3 V turn-off thresholds and 0.5 µs deadtime (t_DT) to prevent shoot-through. Overcurrent detection operates non-dissipatively by sensing high-side MOSFET current fraction, with threshold set by PROGCLA/PROGCLB resistors (e.g., 5 kΩ → 4.42 A ±10%) and fault signaled via open-drain OCDA/OCDB pins.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	8–52 V - supports wide-range industrial and automotive battery-powered motor systems without external regulation.
Peak Output Current	5.6 A per bridge - enables direct driving of medium-power stepper or DC motors without external current amplification.
R_DS(on) High-Side	0.34 Ω typ. at T_j = 25 °C - limits conduction loss to ~4.8 W per bridge at 4 A RMS, enabling compact thermal design.
Switching Frequency	Up to 100 kHz - allows precise microstepping control and reduced audible noise in stepper applications.
Overcurrent Threshold	Programmable from 0.57 A to 5.6 A via PROGCLA/PROGCLB resistor - eliminates need for external sense resistors and associated power loss.
Thermal Shutdown	165 °C junction temperature with 15 °C hysteresis - prevents permanent damage during overload or poor heatsinking conditions.
Diagnostic Outputs	OCDA and OCDB open-drain pins - provide direct fault signaling for system-level error handling and automatic recovery logic.

Pinout & Package

Package: VFQFPN48 (7 × 7 × 1.0 mm), thermally enhanced with exposed EPAD connected to GND for PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
IN1A, IN2A, IN1B, IN2B	Bridge logic inputs	Control H-bridge direction and state (L/L, H/L, L/H, H/H) per bridge; TTL/CMOS compatible with 1.8 V threshold.
ENA, ENB	Bridge enable inputs	Active-high logic; LOW disables all MOSFETs in respective bridge; used with OCDA/OCDB for auto-shutdown recovery.
OUT1A, OUT2A, OUT1B, OUT2B	Power outputs	Four high-current terminals (2 per bridge); support paralleled operation to increase current capability or reduce R_DS(on).
SENSEA, SENSEB	Bridge source sense pins	Direct connection point to power ground or current-sense resistor; critical for low-inductance layout to avoid false OCD trips.
OCDA, OCDB	Open-drain fault outputs	Pull to GND during overcurrent or thermal fault; require external pull-up for interfacing with µC interrupt or status monitoring.
VSA, VSB	Bridge power supplies	Must be tied together externally to main VS rail; each supplies one full bridge; decoupling capacitors required near pins.
VBOOT	Bootstrap supply input	Drives high-side gates via external charge pump (C_BOOT, D1, D2, C_P, R_P); requires 220 nF ceramic capacitor.
VCP	Charge pump oscillator	600 kHz square wave output (10 V amplitude); drives external charge pump components to generate VBOOT voltage.

Key Features

Feature	Design Value
Non-dissipative high-side overcurrent detection	Eliminates external sense resistors and associated I²R losses; threshold set precisely via PROGCLA/PROGCLB resistors.
Integrated cross-conduction protection	1 µs internal deadtime prevents shoot-through during PWM transitions, ensuring safe commutation without external timing circuits.
Thermal shutdown with hysteresis	165 °C trip point + 15 °C hysteresis ensures reliable recovery after cooling, avoiding oscillatory shutdown in marginal thermal conditions.
Paralleled operation support	Enables doubling of effective current capacity (e.g., 11.2 A OCD threshold) or halving of R_DS(on) (0.15 Ω typ.) when bridges are combined.
Diagnostic open-drain outputs	OCDA/OCDB provide direct, logic-level fault signals compatible with µC GPIO interrupts or LED indicators without level-shifting.

Applications

Bipolar Stepper Motor Control

Dual DC Motor Drive

Use Scenario: Precision position control in CNC stages, 3D printer extruders, and automated lab equipment requiring 1/4–1/32 microstepping.

IC Role / Device Role / Timing Role: Dual full-bridge driver delivering bidirectional current to both motor phases; synchronized PWM and deadtime ensure smooth torque delivery.

Use Value: Integrated OCD eliminates external sense resistors, reducing BOM count and board area while maintaining ±10% current accuracy across temperature.

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

IC Role / Device Role / Timing Role: Two isolated H-bridges with separate ENA/ENB and INx inputs enable independent speed/direction control and coordinated motion profiles.

Use Value: Programmable overcurrent thresholds (via RCL) allow tailoring protection levels per motor load, preventing nuisance trips during startup surge.

Quad DC Motor Interface

Industrial Actuator Module

Use Scenario: Compact actuation subsystem in HVAC dampers, smart valves, or access control locks requiring four independent low-voltage DC motors.

IC Role / Device Role / Timing Role: Dual-bridge topology repurposed as four half-bridges (OUT1A/OUT2A/OUT1B/OUT2B) for individual motor control with shared supply rails.

Use Value: VFQFPN48 package with EPAD enables high-power density in space-constrained enclosures; thermal shutdown protects against jammed actuator conditions.

Use Scenario: DIN-rail mounted motor interface module for PLC-controlled factory automation, supporting field-replaceable motor drivers.

IC Role / Device Role / Timing Role: Primary power stage with diagnostic feedback (OCDA/OCDB) feeding back to PLC I/O or safety controller for predictive maintenance alerts.

Use Value: Open-drain fault outputs simplify integration into 24 V industrial control logic; wide 8–52 V supply accommodates legacy and modern DC bus voltages.

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 (2.7–13.5 V), lower peak current (3.2 A), no programmable OCD, no charge pump - uses external bootstrap caps only.	Suitable for low-voltage robotics and educational platforms; lacks thermal shutdown and diagnostic outputs.	Select when cost and board space are critical and supply voltage remains ≤13.5 V; not suitable for 24/48 V industrial systems.
DRV8876PWPR	Higher voltage (4.5–45 V), higher peak current (7.2 A), integrated current regulation (not OCD), no dual-bridge diagnostic separation.	Optimized for single-motor high-current applications; OCDA/OCDB-style per-bridge fault reporting is absent.	Choose for single-axis high-torque DC motor control where independent bridge diagnostics are unnecessary and tighter current regulation is preferred.

Compared with TB6612FNG and DRV8876PWPR, the L6206QTR uniquely provides per-bridge programmable overcurrent detection, thermal shutdown with hysteresis, and dual open-drain diagnostic outputs - making it the only option among the three qualified for safety-critical, multi-motor industrial motion systems requiring traceable fault isolation.

Availability

L6206QTR is available at Aetrix Electronics and suitable for industrial motor control, precision motion systems, and embedded actuator modules requiring stable component supply across extended product lifecycles.

Supply support for L6206QTR 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, Switzerland, specializing in power management, motor control, and automotive-grade analog/mixed-signal ICs.

The L6206QTR belongs to ST's L62xx family of high-voltage DMOS motor drivers, engineered specifically for robust, high-efficiency control of bipolar stepper and multi-DC-motor systems in harsh industrial environments.

FAQ

What is the minimum recommended external bootstrap capacitor value for L6206QTR?

The datasheet specifies a 220 nF ceramic capacitor (C_BOOT) between VBOOT and VS for reliable high-side gate drive under 100 kHz switching. Using a smaller value risks insufficient charge replenishment, causing high-side FET dropout and increased heating. X7R or better dielectric is required to maintain capacitance across temperature and bias.

Can L6206QTR drive a unipolar stepper motor?

No - the L6206QTR is designed exclusively for bipolar stepper motors, which require full-bridge current reversal per phase. Unipolar steppers use center-tapped windings and require different drive topologies (e.g., 4-channel low-side drivers). Attempting unipolar operation would result in incorrect phase energization and loss of torque control.

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

It uses an internal current mirror that samples a precise fraction (typically ~1:2000) of the high-side MOSFET drain current. This mirrored current is compared to an internal reference; when exceeded, the OCD comparator triggers OCDA/OCDB. No external resistor is needed because the sensing element is monolithically integrated into the DMOS structure.

Is paralleling OUT1A with OUT1B electrically safe and supported in the datasheet?

Yes - ST explicitly documents this configuration in Section 6 ("Paralleled operation"). When OUT1A and OUT1B are tied together (and similarly OUT2A/OUT2B), current sharing is ensured by matched R_DS(on) on-die, resulting in 0.15 Ω effective resistance and 11.2 A OCD threshold. Layout must maintain equal trace lengths and symmetric thermal coupling to avoid imbalance.

L6206QTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 48-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Half Bridge (4)

Applications:: DC Motors, Stepper Motors, Voltage Regulators

Interface:: Logic

Load Type:: Inductive

Technology:: BCDMOS

Rds On (Typ):: 280mOhm LS, 340mOhm HS

Current - Output / Channel:: 2.5A

Current - Peak Output:: 5.6A

Voltage - Supply:: 8V ~ 52V

Voltage - Load:: 8V ~ 52V

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

Grade:: -

Qualification:: -

Features:: Bootstrap Circuit

Fault Protection:: Current Limiting, Over Temperature, UVLO

Mounting Type:: Surface Mount

Supplier Device Package:: 48-VFQFPN (7x7)

L6206QTR FAQ

1.How can I place an order for L6206QTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6206QTR 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 L6206QTR reliable?

The price and inventory of L6206QTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6206QTR is usually 5 days.

3.What payment methods are accepted for L6206QTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6206QTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6206QTR?

L6206QTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6206QTR 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 L6206QTR?

For technical support, including L6206QTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6206QTR requirements.

6.How does Aetrix verify that L6206QTR is sourced from the original manufacturer or authorized distributors?

All L6206QTR 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 L6206QTR meets industry standards.

7.What is the process for return or replacement of L6206QTR?

All L6206QTR units undergo pre-shipment inspection (PSI). If there is an issue with L6206QTR, 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 L6206QTR part is unused and in its original packaging.

Return procedure for L6206QTR:

1.Submit a request within 90 days.

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

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