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A1445 Datasheet Low-voltage Full-bridge Brushless DC Motor Driver

Manufacturer: Allegro MicroSystems

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

This datasheet includes multiple variants, all published together in a single manufacturer document.

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.

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

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.

More Datasheets from Allegro MicroSystems

Part Number Description
A1444 Low-Voltage Full-Bridge Brushless DC Motor Driver
A1454 3V Hall Effect Linear Sensor
A1469 Three-Wire True Zero-Speed Differential Peak-Detecting Sensor IC

A1445 Distributor