Brushless DC Drivers

Three-Phase Sensorless Sinusoidal Fan Driver IC

A5931

Markets Served

This integrated sensorless driver minimizes fan noise, vibration, and uses sinusoidal modulation and closed-loop speed control to ensure quiet and efficient operation, eliminating the need for Hall sensors. Available in automotive and commercial grades.

Evaluation Board

Product Details

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
Target Application

Part Number Specifications and Availability

View Full Specification Details

A5931GESTR-1-T

supply_voltage_min_v
-
supply_voltage_max_v
-
peak_output_current_a
-
architecture
-
control_interface
-
rds_on
-
commutation
-
motor_positioning_method
-
sleep_current
-
current_sense_amplifiers
-
number_of_bridges
-
temperature
-
package
-
market
-
typical_load_current_a
-

A5931GESTR-S-T

supply_voltage_min_v
-
supply_voltage_max_v
-
peak_output_current_a
-
architecture
-
control_interface
-
rds_on
-
commutation
-
motor_positioning_method
-
sleep_current
-
current_sense_amplifiers
Integrated
number_of_bridges
-
temperature
-
package
-
market
-
typical_load_current_a
-

A5931GESTR-T

supply_voltage_min_v
5
supply_voltage_max_v
16
peak_output_current_a
4.2
architecture
Integrated MOSFET
control_interface
PWM Speed, I²C
rds_on
0.21 - 0.3, 0.225 - 0.32
commutation
Sinusoidal
motor_positioning_method
Sensorless
sleep_current
100
current_sense_amplifiers
-
number_of_bridges
Half-Bridge x3
temperature
-40°C to 105°C, -40°C to 125°C
package
24-Pin QFN, 16-Pin TSSOP
market
Industrial
typical_load_current_a
0-3

A5931GLPTR-T

supply_voltage_min_v
5
supply_voltage_max_v
16
peak_output_current_a
4.2
architecture
Integrated MOSFET
control_interface
PWM Speed, I²C
rds_on
0.21 - 0.3, 0.225 - 0.32
commutation
Sinusoidal
motor_positioning_method
Sensorless
sleep_current
100
current_sense_amplifiers
Integrated
number_of_bridges
Half-Bridge x3
temperature
-40°C to 105°C, -40°C to 125°C
package
24-Pin QFN, 16-Pin TSSOP
market
Industrial
typical_load_current_a
0-3

A5931KESTR-1-J

supply_voltage_min_v
-
supply_voltage_max_v
-
peak_output_current_a
-
architecture
-
control_interface
-
rds_on
-
commutation
-
motor_positioning_method
-
sleep_current
-
current_sense_amplifiers
-
number_of_bridges
-
temperature
-
package
-
market
-
typical_load_current_a
-

A5931KLPTR-T

supply_voltage_min_v
5
supply_voltage_max_v
16
peak_output_current_a
4.2
architecture
Integrated MOSFET
control_interface
PWM Speed, I²C
rds_on
0.21 - 0.3, 0.225 - 0.32
commutation
Sinusoidal
motor_positioning_method
Sensorless
sleep_current
100
current_sense_amplifiers
Integrated
number_of_bridges
Half-Bridge x3
temperature
-40°C to 105°C, -40°C to 125°C
package
24-Pin QFN, 16-Pin TSSOP
market
Industrial
typical_load_current_a
0-3

Design Tools

ECAD FILE

A5931

A5931 ECAD Model Type Image
Software

Software Portal

Technical Documentation

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A5931 Evaluation Board User Guide
Guide

A5931 Evaluation Board User Guide

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