AH5775-P-B

Overview

The AH5775-P-B is a single-phase motor driver IC from Diodes Incorporated, designed for driving single-coil brushless DC (BLDC) fans and motors. It integrates a Hall-effect latch sensor, amplifier, voltage reference, and a full-bridge switch output stage capable of handling 300 mA continuous and 800 mA peak current. The device operates within a supply voltage range of 2.5 V to 18 V and features soft-switching technology to minimize switching noise and electromagnetic interference (EMI). It includes comprehensive protection mechanisms such as rotor lock detection with automatic restart, overvoltage protection, and thermal shutdown.

Feature Summary

• Integrates Hall-effect latch sensor, amplifier, voltage reference, and full-bridge switch for a highly consolidated solution
• Soft-switching output stage significantly reduces switching noise and electromagnetic interference (EMI)
• Provides rotor lock protection with automatic restart capability to prevent coil overheating or damage
• Includes overvoltage protection and thermal shutdown for enhanced system reliability and component safety

Applications

• 12 V BLDC cooling fans and motors
• Notebook and desktop computer cooling fans and blowers
• Power supply cooling fans for instruments and equipment

Procurement Notes

Verify the specific suffix P-B against the manufacturer's latest datasheet to confirm package type and pinout compatibility. Ensure the application environment remains within the specified operating temperature range of -40 °C to 105 °C. Confirm that the load current does not exceed the 800 mA peak rating to maintain device integrity. Check for any updated RoHS compliance statements prior to final procurement.

Selection Notes

Select this component for applications requiring a compact, single-chip solution for single-coil BLDC motor control. It is suitable where low EMI and reduced external component count are critical design constraints. Consider its integrated protection features for environments prone to rotor locking or voltage spikes. Evaluate the TO94 package suitability for the target thermal management requirements.

Part Context

This part belongs to the AH5775 series of motor drivers from Diodes Incorporated. It is specifically engineered for low-power BLDC fan applications, offering a cost-effective alternative to discrete solutions by integrating sensing and driving functions into a single semiconductor package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.