A1441 Hall Effect Direction Detection Sensor Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: November 2, 2009 Recommended Substitutions: For existing customer transition, and for new customers or new appli- cations, contact Allegro Sales. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon- sibility for its use nor for any infringements of patents or other rights of third parties which may result from its use.A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Features and Benefits Description Single-chip solution for high reliability The A1441 is a full-bridge motor driver designed to drive Chopper stabilization technique for precise signal low-voltage bipolar brushless DC motors. Commutation of response over operating range the motor is achieved by use of a single Hall element to detect 2.0 to 4.0 V operation the position of an alternating-pole ring magnet. A high density Sleep mode pin allowing external logic signal enable/ merged Bipolar-CMOS semiconductor process allows the disable to reduce average power consumption integration of the Hall element on the same IC as the motor Restart feature control circuitry, providing a single-chip solution for enhanced Small package size reliability. All necessary circuitry is incorporated within the device package, eliminating the need for any external support components. A micropower sleep mode can be enabled by an external signal, to reduce current consumption for battery management Package: 6 Contact MLP/DFN/SON (suffix EL) in portable electronic devices. In addition, the device offers an active function for motor braking. The A1441 is optimized for vibration motor applications such 6 5 as cellular phones, pagers, electronic toothbrushes, and hand- 4 held video game controllers. These devices also drive low power fan motors designed with cogging plates. 1 2 3 Continued on the next page Approximate Scale 1:1 Functional Block Diagram 1441-DS, Rev. 4