AH5771-PG-B

Overview

The AH5771-PG-B is a single-phase Hall effect latch smart fan driver manufactured by Diodes Incorporated. Designed for brushless DC motor applications, this integrated circuit combines a magnetic sensor with an output driver stage to facilitate efficient fan control. The device operates within a specified voltage range and features internal logic to process Hall sensor signals, enabling reliable commutation for small cooling fans in consumer electronics and computer peripherals.

Feature Summary

• Integrates a Hall effect latch sensor with a dedicated motor driver stage for simplified single-phase BLDC control
• Provides robust magnetic sensing capabilities to detect rotor position for accurate commutation timing
• Designed for direct interface with small brushless DC motors commonly found in thermal management systems

Applications

• Single-phase brushless DC fan motors in computer cooling systems
• Thermal management solutions in consumer electronic devices
• Small appliance motor control circuits requiring integrated magnetic sensing

Procurement Notes

Verify the specific suffix PG-B against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure the design supports the required supply voltage and load characteristics for the intended single-phase motor application before finalizing component selection.

Selection Notes

Select this component when designing single-phase BLDC fan drivers that require integrated magnetic sensing rather than discrete Hall sensors. It simplifies the bill of materials by combining sensing and driving functions. Consider thermal performance and operating temperature range relative to the enclosure environment.

Part Context

This part belongs to the AH577x series of single-phase motor drivers from Diodes Incorporated. These components are specifically engineered for low-cost, high-volume fan applications where space constraints favor integrated solutions over discrete magnetic and driver combinations.

Replacement Considerations

The AH5772 and AH5773 are similar single-phase motor drivers within the same family. Verify functional equivalence and pin compatibility if substituting, as these variants may offer different feature sets or performance levels.