A4984SESTR-T

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The A4984SESTR-T is an advanced power IC consisting of a dual full-bridge and a 25 V internal regulator. It is part of the Allegro family of ICs and is designed to work in a variety of applications, such as motor control and battery operation. It is designed to have wide operating temperature range, high accuracy, and high power efficiency. The A4984SESTR-T is an ideal IC for motor control applications such as in electric vehicles and industrial automation.

Application Field

The A4984SESTR-T is specifically designed to handle motor drive and power management requirements. It is designed to meet the toughest requirements in industrial, transportation and robotic applications and is suitable for use in electric vehicles, refrigeration and automation systems. Additionally, it incorporates a wide range of protection features to limit damage resulting from overloads or short-circuits.

Working Principle

The A4984SESTR-T has a dual full-bridge, comprised of two independent low-side and high-side half-bridge drivers. Each bridge is independently controlled and can deliver up to 3A of output current. The bridge is driven by an internal clock, allowing for PWMs with up to 120 kHz switching frequencies. In addition, it integrates a 25 V internal regulator and a 1.3 A output current LDO for supplying the logic and sensor circuits.

Types of Control

The A4984SESTR-T can be used in a variety of motor control schemes, including open-loop, closed-loop, sinusoidal and trapezoidal commutation. In open-loop schemes, the motor is controlled by a set of open-loop commands, usually generated by a microcontroller or an external signal. Closed-loop schemes, on the other hand, use feedback signals from the motor to detect variations in rotor speed and continuously adjust the motor accordingly. Sinusoidal and trapezoidal commutation schemes are also used to provide smoother torque and speed control.

Safety Features

The A4984SESTR-T comes with a range of safety features to protect the IC and the motor. These include over-current, over-temperature, over-voltage and short-current protection. It also includes diagnostic features, such as temperature monitoring and current sensing, to help ensure proper operation of the motor and to reduce the risk of failure.

Conclusion

The A4984SESTR-T is an advanced power IC designed for motor control and management applications. It is designed to have wide operating temperature range, high accuracy, and high power efficiency. Additionally, it has a range of protection features to limit damage resulting from overloads or short-circuits. The IC can be used in a variety of motor control schemes, including open-loop, closed-loop, sinusoidal and trapezoidal commutation.

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