A3964SB

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The A3964SB is a non-blocking motor controller dedicated to permanent magnet brush motors in automotive and other industrial applications with three phase power stages up to 40A and supply voltage up to 40V. The A3964SB is designed to be used in electronic throttle control, power steering, air-conditioners, transmission control, HVAC and other motor control systems.

The A3964SB can monitor and control the current through the motor, allowing precise control and high efficiency. It includes a number of features to maintain high performance and reliability, including a full bridge selectable pull-up, short-circuit protection, and sleep or wake-up from under-voltage lockout. The A3964SB supports several interface options, depending on the application, including 3- to 5-wire SPI, I2C, I2S and analog interface.

The A3964SB\'s control algorithm is configured with two factors: current control and speed control. Current control is selected when precise control of motor current is required, while speed control is chosen when the speed of the motor has to be regulated in a range. Current control works by sensing current across the motor phases and controlling the output current to match the given input. Speed control works by comparing target speed and actual speed, then adjusting the duty cycle applied to the motor.

The A3964SB operates in a number of different modes, allowing the application to be tailored to the application requirements. The modes are divided into "digital" and "analog" modes, each with its own set of features. In digital mode, the controller provides high-precision current and speed control, while in analog mode the controller provides basic current control with steady feedback. The controller also supports pulse-width modulated (PWM) control, which is ideal for applications where motor speed is not critical.

The A3964SB offers a number of additional features, including an integrated Hall-effect current-sensing circuit, over-current protection, under-voltage protection, moderate operating temperature range, and various fault detections, such as over-temperature, over-current, and under-voltage. Additionally, the controller features full cycle-by-cycle current integrated protection, short-circuit protection, and thermal shutdown.

In summary, the A3964SB is a power efficient and cost-effective motor driver for automotive and industrial applications. Its features, such as integrated Hall-effect current-sensing circuit, over-current protection, under-voltage protection, moderate operating temperature range and multiple fault detections make it a reliable choice for controlling permanent brush motors. In addition, the controller supports a variety of interfaces and controls modes, making it a versatile motor controller.

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