Part Number: A1441
Function: Low-Voltage Full-Bridge Brushless DC Motor Driver
Manufacturer: Allegro MicroSystems
Images:
Description
The A1441 is a full-bridge motor driver designed to drive low-voltage bipolar brushless dc motors. Commutation of the motor is achieved by use of a single Hall element sensor to detect the position of an alternating-pole ring magnet. A high density merged Bipolar-CMOS semiconductor process allows the integration of the Hall element on the same IC as the motor control circuitry, providing a single-chip solution for enhanced 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 in portable electronic devices. In addition, the device offers an active function for motor braking.
The A1441 is optimized for vibration motor applications such as cellular phones, pagers, electronic toothbrushes, and handheld video game controllers. These devices also drive low power fan motors designed with cogging plates. Package: 6 Contact MLP/DFN/SON (suffix EL) 6 5 4 1 2 3 Approximate Scale 1:1 Continued on the next page… Functional Block Diagram 1441-DS, Rev. 2 A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation a lead (Pb) free (leadframe plating 100% matte tin) 6-pin surface mount MLP (microleadframe: DFN) package, with exposed pad for enhanced thermal dissipation.
A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation
Features and Benefits
▪ Single-chip solution for high reliability
▪ Chopper stabilization technique for precise signal response over operating range
▪ 2.0 to 4.0 V operation
▪ Sleep mode pin allowing external logic signal enable/ disable to reduce average power consumption
▪ Restart feature
▪ Small package size
Pinouts:
A1441 PDF Datasheet
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