A5931: Three Phase Sensorless Fan Driver

Description

The A5931 is a three phase sensorless BLDC fan driver IC that incorporates sinusoidal drive to minimize audible noise and vibration.

A flexible closed-loop speed control system is integrated into the IC. This eliminates the requirement for a microprocessor-based system and minimizes programming requirements.

The A5931 device is available in both commercial and automotive grade.

A5931-3 is the latest in the family with a new feature that allows user to adjust deceleration speed from Force Open Loop to Close Loop.

Top Features

  • 180° sinusoidal drive - low audible noise and vibration
  • Motor position using Allegro's sensorless algorithm - eliminates external Hall sensors

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A5931GESTR-T 24-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5931GLPTR-T 16-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5931KESTR-1-J 24-lead QFN -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5931KLPTR-T 16-lead TSSOP -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Packaging

A5931 Packages