Allegro has launched a new full-bridge motor driver specifically designed for low-voltage bipolar brushless DC motors. This innovative solution simplifies motor control by using a single Hall element sensor to detect the position of the alternating pole magnet, eliminating the need for complex external circuitry. The high-density CMOS process integrates all essential components—Hall sensors, motor control circuits, and full-bridge outputs—onto a single chip, making it highly compact and efficient.
The A1442 operates at as low as 1.8V, thanks to advanced low-voltage design techniques, making it ideal for battery-powered applications. It offers built-in protection features such as reverse battery protection and output short-circuit protection, eliminating the need for external components and improving overall system reliability.
One of the standout features of the A1442 is its soft switching algorithm, which significantly reduces audible noise and electromagnetic interference (EMI). This makes it particularly suitable for sensitive environments where quiet operation is crucial. Additionally, the device includes a micropower sleep mode that can be activated via an external signal, helping to extend battery life in portable electronics. This feature also allows the elimination of FET transistors typically used for power management, further reducing system complexity.
The A1442 also supports active motor braking, which enhances performance in applications like the Caller ID vibration mode, allowing for faster stop and start cycles. This makes it a great fit for devices such as mobile phones, pagers, electric toothbrushes, handheld game controllers, and low-power fan motors.
Designed with space efficiency in mind, the A1442 comes in a small, lead-free MLP package with an exposed heatsink for improved thermal performance. The 6-pin MLP/DFN (EW suffix) package measures just 1.5mm x 2mm x 0.4mm, making it one of the thinnest available on the market. Its slim profile and compact size make it ideal for applications where board space and component clearance are critical. Whether for consumer electronics or industrial applications, the A1442 delivers high performance in a minimal form factor.
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