US90AEZE-AAA-000-SP

Overview

The US90AEZE-AAA-000-SP is a two-coil fan driver from the US90A series, designed for brushless DC motor control. It operates on a supply voltage range of 4.7 V to 30 V and supports load voltages of 12 V and 24 V. The device features an output current capability of 20 mA with a maximum output voltage of 100 V. It functions within a temperature range of -40 °C to +125 °C and consumes a working supply current of 2 mA. The component is housed in an SOT-23-5 package.

Feature Summary

• Integrates Hall effect sensors with dynamic offset correction for precise commutation
• Includes locked rotor protection with automatic restart functionality
• Features integrated frequency generator or tachometer output signals

Applications

• Brushless DC fan motor drivers
• Cooling system controllers
• HVAC unit fans

Procurement Notes

Verify the Not Recommended for New Design (NRND) status before finalizing any procurement plans. Confirm that the SOT-23-5 package variant matches the specific footprint requirements of the target PCB layout. Ensure compatibility with the 4.7 V to 30 V supply voltage range for the intended application environment.

Selection Notes

Select this component when a low-cost solution for driving two-coil BLDC fans is required. It is suitable for applications needing integrated protection against locked rotors. Consider the SOT-23-5 package for surface-mount assembly constraints. Verify that the 20 mA output current meets the coil drive requirements of the specific fan motor.

Part Context

This part belongs to the US90A/US91A family of motor drivers. These ICs are based on CMOS technology and integrate power MOSFETs. They are designed as single-chip solutions for cooling fans, combining sensor interfaces with low-side output drivers. The series emphasizes cost-effectiveness and robust operation in thermal management systems.

Replacement Considerations

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