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Product Detailed Parameters
- Description：SENSORLESS SINUSOIDAL FAN DRIVER
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The A5931GESTR-T is a three-phase sensorless fan driver IC from Allegro MicroSystems, designed for brushless DC (BLDC) motor applications. It integrates sinusoidal drive technology to minimize audible noise and vibration in high-speed server fans. The device features a flexible closed-loop speed control system and operates within a supply voltage range of 5 V to 16 V. It delivers an output current of 3 A and supports interfaces including analog, I²C, and PWM. The component is housed in a 24-QFN package with exposed pad, suitable for surface mount installation, and functions reliably across a temperature range of -40 °C to +105 °C.
Feature Summary
- Integrates sinusoidal drive technology to minimize audible noise and vibration
- Features a flexible closed-loop speed control system
- Supports multiple interface options including analog, I²C, and PWM
Applications
- Evaluation of three-phase sensorless BLDC fan drivers
- High-speed server fan cooling systems
- Noise-sensitive electronic equipment cooling
Procurement Notes
Verify the specific suffix against official datasheets to confirm functional variations such as speed curve configurations. Ensure compatibility with required operating voltages and thermal management solutions. Confirm packaging details match design requirements. Cross-reference manufacturer documentation for humidity sensitivity handling procedures during assembly.
Selection Notes
Select this component for applications requiring low acoustic noise and vibration in three-phase BLDC fan systems. Consider the integrated closed-loop control for precise speed regulation without external sensors. Evaluate the 24-QFN package for space-constrained designs. Verify interface compatibility with host controllers supporting analog, I²C, or PWM signals.
Part Context
The A5931 series includes variants like A5931GESTR-1-T which may feature specific speed curve updates. Development tools such as the APEK5931GES-01-T evaluation board are available for testing. The family targets server and industrial cooling markets where reliability and quiet operation are critical.
Replacement Considerations
Publicly confirmed substitute part numbers are not provided in the source material. Consult Allegro MicroSystems for direct replacements or updated revisions within the A5931 family.
