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Allegro MicroSystems, LLC has unveiled a groundbreaking sensorless brushless DC (BLDC) motor controller, the A5932. This advanced device is designed to meet the growing demands of high-performance automotive applications, offering improved efficiency and reliability. The A5932 is specifically tailored for use in high-power automotive fan systems, where minimizing vibration and noise is critical. Its advanced design ensures smooth operation, making it ideal for applications such as seat adjustments, battery cooling, infotainment systems, and headlamp cooling fans.
One of the standout features of the A5932 is its MOSFET gate driver output, which dynamically adjusts motor current based on specific application requirements. This flexibility allows engineers to optimize performance for different use cases. Additionally, the device comes with a user-friendly graphical interface (GUI), streamlining the evaluation process and significantly reducing time-to-market for developers.
The A5932 supports a wide range of input frequencies through its speed input (SPD), allowing precise control over motor speed using a duty cycle command. At startup, the motor windings are supplied with a sinusoidal voltage, ensuring quiet and smooth initial operation. This feature helps prevent abrupt starts that could lead to unwanted noise or mechanical stress.
With a nominal input voltage range of 5.5V to 50V, the A5932 is suitable for a variety of power supply configurations. It also operates reliably across an extensive temperature range, from -40°C to 150°C, making it well-suited for harsh automotive environments.
In terms of packaging, the A5932 is available in two options: a compact 24-contact 4 mm x 4 mm QFN package with an exposed thermal pad (suffix 'ES'), and a 24-pin TSSOP package with an exposed thermal pad (suffix 'LP'). The QFN version includes tinned flanks, enabling visual inspection of solder joints on printed circuit boards. Both packages are lead-free and feature 100% matte tin leadframe plating, ensuring compliance with environmental standards and long-term reliability.
Whether you're designing next-generation automotive systems or looking to enhance existing Solutions, the A5932 offers a powerful, flexible, and reliable motor control solution. With its advanced features and robust design, it's set to become a key component in modern vehicle electronics.
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