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A1444 Datasheet Low-Voltage Full-Bridge Brushless DC Motor Driver

Manufacturer: Allegro MicroSystems

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General Description

TheA1444 andA1445 are full-bridge motor drivers designed to drive low-voltage brushless DC (BLDC) motors in applications that require rotor speed control and fast rotor start-stop cycles.

A high density CMOS semiconductor process allows the integration of a Hall element, a full-bridge output driver, and PWM speed control logic into one monolithic IC.

Commutation of the motor is achieved by use of a single Hall element to detect the rotational position of an alternating-pole ring magnet.

Overview

A1444 and A1445 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Commutation, Externally Controlled Speed Regulation, Soft Switching, and Reverse Battery, Short Circuit, and Thermal Shutdown.

Key Features

  • Low voltage operation: 1.8 to 4.2 V.
  • Externally controlled motor speed regulation.
  • Fast motor startup and braking function allows faster start-stop cycles.
  • Reverse voltage protection on the VDD and S¯¯L¯¯E¯¯E¯¯P pins.
  • Output short circuit and thermal shutdown protection.
  • Soft switching algorithm for reduced audible switching noise and EMI interference.
  • Unidirectional operating mode results in motor rotation in only one direction.
  • Chopper stabilization red.

📁 Similar Datasheet

Brand Logo Part Number Description Manufacturer
ETC A1444 2SA1444 ETC

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