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Product Detailed Parameters
- Description：AUTOMOTIVE 3-PHASE SENSORLESS SI
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR)
- Motor Type - Stepper：Multiphase
- Motor Type - AC, DC：Brushless DC (BLDC)
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (3)
- Interface：Analog, I2C, PWM
- Technology：Power MOSFET
- Step Resolution：-
- Applications：Fan Motor Driver
- Current - Output：3A
- Voltage - Supply：5V ~ 16V
- Voltage - Load：-
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-QFN (4x4)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The A5931KESTR-1-J is a three-phase fan and motor controller/driver manufactured by Allegro MicroSystems. It features an integrated power MOSFET architecture designed for sensorless sinusoidal brushless DC (BLDC) motor applications. The device supports a supply voltage range of 4.5 V to 6 V and delivers a continuous output current of 3 A. It operates within a temperature range of -40°C to +125°C and is housed in a 24-pin QFN package with exposed pad for surface mount installation.
Feature Summary
- Integrates control logic and power stages for three-phase BLDC motor drive
- Supports sensorless sinusoidal commutation for smooth operation
- Includes Dell speed curve, forced open loop curve, and forced open loop curve updates
Applications
- Fan motor drivers
- Computer cooling systems
- Appliance motor control
Procurement Notes
Verify the specific suffix 'J' against the official datasheet to confirm pinout and electrical characteristics match the design requirements. Ensure the 6V maximum supply voltage constraint aligns with the system power rail. Confirm the QFN-24 package thermal performance meets the application's heat dissipation needs.
Selection Notes
Select this component for low-voltage, high-current three-phase motor applications requiring integrated control and drive capabilities. The wide operating temperature range makes it suitable for demanding environments. Verify that the sensorless control algorithm compatibility matches the target motor type.
Part Context
This part belongs to the A5931 series of motor controllers from Allegro MicroSystems. The series is designed for efficient and quiet operation of small three-phase motors. The KESTR-1-J designation indicates specific packaging and feature set variations within the broader product line.
Replacement Considerations
Check for direct substitutes such as the A5931GESTR-1-T or A5931GESTR-T, ensuring voltage ratings and package types are compatible. Verify functional equivalence regarding the specific Dell speed curve and open loop features if critical to the application.
