Part Number: L6208Q

Manufacturer: STMicroelectronics

Description: IC MTR DRVR BIPOLAR 8-52V 48QFN

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of L6208Q

Datasheet  L6208Q datasheet
Category Integrated Circuits (ICs)
Family PMIC – Motor Drivers, Controllers
Manufacturer STMicroelectronics
Packaging Tray
Part Status Active
Motor Type – Stepper Bipolar
Motor Type – AC, DC
Function Driver – Fully Integrated, Control and Power Stage
Output Configuration Half Bridge (4)
Interface Parallel
Technology DMOS
Step Resolution 1, 1/2
Applications General Purpose
Current – Output 2.5A
Voltage – Supply 8 V ~ 52 V
Voltage – Load 8 V ~ 52 V
Operating Temperature -25°C ~ 125°C (TJ)
Mounting Type Surface Mount
Package / Case 48-VFQFN Exposed Pad
Supplier Device Package 48-QFN (7×7)


The L6208Q is a fully integrated stepper motor driver with advanced features like non-dissipative overcurrent safety, constant OFF-time PWM current control, and phase sequence generation. This guide aims to give a complete overview of the L6208Q device by describing its most important features, how it works, and what it can be used for. Whether you’re a fan of electronics or a skilled engineer, this guide will help you understand the L6208Q stepper motor driver and use it to its full potential.

Introduction to Stepper Motors

Overview of Stepper Motors

Stepper motors are electronic devices that turn pulses of electricity into precise motions of a mechanical part. Stepper motors are different from regular motors because they don’t keep turning. Instead, they move in discrete steps, which lets you direct their position and speed very precisely. They are used in many situations where precise positioning and control of movements are needed.

The parts of a stepper motor are the rotor and the stator. The rotor has a fixed magnet or several teeth, and the stator has electromagnetic coils inside it. By giving power to the coils in a certain order, the magnetic fields combine and make the rotor move in small steps.

Stepper Motor Operation Principles

Electromagnetism is the basic idea behind how stepper motors work. When an electric current flows through the coils of the stator, it creates a magnetic field that either pulls or pushes the magnetic parts of the rotor. By turning on the coils in a certain order, the rotor moves forward in defined steps.

Stepper motors usually come in two types: bipolar and unipolar. Bipolar stepper motors have two coils, and the current can flow both ways. This gives the motor more torque and control. Unipolar stepper motors have more than one coil, but the current can only flow one way. This makes them easier to control, but they usually have less torque.

Stepper motors, like the L6208Q, are powered by stepper motor drivers. These drivers control how much current and voltage are sent to the motor coils. This lets you move and control the speed of the motor with great accuracy. The driver takes control signals and turns them into the electrical pulses the motor needs to move in the right direction and at the right speed.

Applications of Stepper Motors

Stepper motors are used in a wide range of industries and devices because they are easy to control and can hold their place even when they don’t have power. Some of the most popular uses are:

  • Robotics and automation: Stepper motors are used a lot in robotic systems to do things like move arms, control grippers, and place things precisely. They are also used in conveyor lines, CNC machines, and 3D printers, which are all automated systems.
  • Medical and Laboratory Equipment: Stepper motors are used in medical imaging equipment, robotic treatment systems, and lab automation, among other things. They make sure that sample handling, fluid control, and imaging systems are in the right place.
  • Stepper motors are used in many parts of cars, such as instrument clusters on the dashboard, fuel injection systems, and headlight leveling devices. In these very important uses, they offer precise control and reliability.
  • Consumer electronics: Stepper motors are used in printers, scanners, tracking systems for cameras, and disk drives, among other things. They make sure that the paper feed, picture scan, lens adjustment, and disk head placement are all done precisely.
  • Industrial Equipment: Stepper motors are used in textile tools, packaging equipment, and industrial robots. They control motion in different industrial processes in a way that is accurate and repeatable.

These are just a few examples of the many different ways stepper motors can be used well. Because they are flexible, easy to control, and can stay in place, they are an important part of many electromechanical systems in many different businesses.

Introducing the L6208Q Stepper Motor Driver

The L6208Q is a stepper motor driver with a lot of built-in features for bipolar two-phase stepper motors. Using BCDmultipower technology, it puts DMOS power transistors, CMOS circuits, and bipolar circuits all on the same chip. The driver has a dual DMOS full bridge, constant off-time PWM current control, a phase sequence generator, non-dissipative overcurrent safety, and thermal shutdown.

Features and Advantages

  • Non-dissipative overcurrent protection
  • Constant OFF time PWM current control
  • Integrated dual DMOS full bridge
  • Phase sequence generator
  • Thermal shutdown

L6208Q Device Architecture

● BCDmultipower Technology

The L6208Q uses BCDmultipower technology, which combines DMOS power transistors, CMOS circuits, and bipolar circuits on a single chip. This technology makes system construction easier and makes the best use of board space.

● Isolated DMOS Power Transistors

In its dual DMOS full bridge version, the L6208Q has separate DMOS power transistors. These transistors can handle high currents, switch power quickly, and keep high-power and low-power circuits electrically separate.

● Integration of CMOS and Bipolar Circuits

The CMOS and bipolar circuits and DMOS power transistors are all built into the L6208Q. This integration makes it possible to handle different things and makes the design simpler by cutting down on the need for external parts and logic circuitry.

By using BCDmultipower technology and combining DMOS, CMOS, and bipolar circuits, the L6208Q is able to drive two-phase bipolar stepper motors in a way that is small, reliable, and efficient.

Key Functional Blocks

● Dual DMOS Full Bridge

The L6208Q has a dual DMOS full bridge configuration, which lets the motor current be controlled in both directions for accurate and smooth movement.

● Constant OFF Time PWM Current Controller

The L6208Q uses a constant-off PWM current driver to control the motor current with high accuracy. This cuts down on power loss and makes the motor more efficient.

● Phase Sequence Generator

The L6208Q has a built-in phase sequence generator that makes the appropriate stepping sequence for the motor. This makes system design easier because external logic circuitry is no longer needed.

● Non-dissipative Overcurrent Protection

The L6208Q has a non-dissipative overcurrent safety feature that protects the motor and driver from too much current flow without wasting power.

● Thermal Shutdown

The L6208Q has a thermal shutdown feature that briefly turns off the driver when the temperature goes above a safe level. This protects both the device and the system from overheating.

The L6208Q stepper motor driver has these functional blocks that allow for exact control, efficient power management, protection against overcurrent, and thermal safety.

Frequently Asked Questions

● What does the L6208Q stepper motor driver do?

By supplying the required electrical signals and power to operate the motor coils, the L6208Q is utilized to precisely regulate the motion of stepper motors.

● What sets the L6208Q apart?

Innovative features like overcurrent safety and PWM current management, as well as the integration of DMOS, CMOS, and bipolar circuits, make the L6208Q stand out. It also has a fully integrated architecture.

● What benefits may you expect from using the L6208Q?

The L6208Q provides effective power management, accurate current control, bidirectional motor control, a more straightforward system design, overcurrent prevention, and thermal shutdown for device and system protection.

● Can alternative stepper motors be used with the L6208Q?

Yes, as long as they comply with the electrical and current criteria, the L6208Q can be used with a variety of stepper motors. It is designed for two-phase bipolar stepper motors.

● What functions does the L6208Q stepper motor driver perform well?

In addition to other applications needing precise positioning and motion control, the L6208Q is appropriate for robotics, automation, 3D printers, medical equipment, automotive systems, and industrial machines.

Final Thoughts

In conclusion, the L6208Q stepper motor driver stands as a highly advanced and fully integrated solution, boasting features such as overcurrent protection, PWM current control, and phase sequence generation. It excels at providing efficient power management, precise control, and bidirectional motor movement.

With its broad suitability for diverse applications and the convenience of datasheet guidelines for integration, the L6208Q simplifies the design process. Leveraging its reliable performance and robust protection mechanisms, the L6208Q ensures precise and accurate positioning in motor control systems. Take the next step in unleashing the power of the L6208Q by reaching out to us at ICRFQ today and letting us assist you in realizing your motor control projects to their fullest potential.

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Kevin Chen