A5931 and A5931-3: Three Phase Sensorless Fan Drivers

Description

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

The 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.

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 devices are available in both commercial and automotive grade.

Top Features

  • 180° sinusoidal drive - Low audible noise and vibration
  • Motor position using Allegro's sensorless algorithm - Eliminates external Hall sensors
  • Closed-loop speed control
  • Speed curve configuration via EEPROM
  • Lock detection
  • Soft start
  • Standby mode
  • Shorted load protection

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A5931GESTR-3-T 24-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor 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.

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