L6226QTR

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The L6226QTR is a versatile device specifically designed to drive three-phase brushless DC motors. Its onboard control logic and power stage circuitry serves to implement electronic commutation of the motor. This product embeds in one package a three-phase power stage capable to deliver up to 3 A/channel, a three-phase driver as well as programmable logic for proper commutation control. It is intended for driving brushless DC motors (BLDC) commonly used in industrial applications, automotive, drones and many other applications.

BLDC motors (also known as electronically commutated motors (ECMs) or synchronous DC motors) are becoming increasingly popular in many industrial, commercial and consumer applications. This is due to their higher efficiency, small size and the performance advantages they offer when compared to traditional AC induction and brush-type motors. The L6226QTR provides all the integrated circuitry necessary for driving and controlling the motor, including sensorless control, external current sensing and the required protection features.

The L6226QTR features programmable features that make this device suitable for any application, such as motor speed control, current control, dynamic braking, speed regulation and ramping, low speed detection and many other features. For current regulation, the device can measure the actual motor current to create a smooth startup up of the motor and maintain a constant current during operation. For dynamic braking, the device can be used to regulate the motor speed to decelerate the rotors to increase the dynamic braking performance.

The L6226QTR also features a wide range of operating modes, including step and linear speed control, as well as advance and retard drive modes for automatic adjustment of the motor speed and acceleration/deceleration ramping. The device also supports sensing of low voltage, and a variety of fault management functions, including over current, thermal protection and undervoltage detection, as well as programmable dead-time and voltage switching.

The working principle of the L6226QTR is based on the principle of back-electromotive force (BEMF) sensing. The device senses the back-electromotive voltage of each phase and switches the transistors at the proper time so as to keep the motor running at the desired speed. A Hall-effect sensor can also be connected to the device to provide feedback on the rotor position, enabling more precise control of the motor speed and current.

The L6226QTR is extremely versatile and can be used in many applications, such as industrial machines, power tools, home appliances, automotive systems, drones and other similar applications. The device is available in three packages: SO-5x5, SSOP-2.2x2.2 and DFN-5x5. All these packages make it ideal for high density designs.

In summary, the L6226QTR is an ideal choice for driving brushless DC motors in various applications. Its integrated power stage and control logic deliver outstanding performance for any application including speed control, current control, dynamic braking, low speed detection and many other features. Additionally, the device features a variety of protection and fault management functions, widely available packages, and programmable features to enable customisation. With all these features, the L6226QTR truly stands out as one of the most capable motor driver ICs available today.

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