AMT49406GESSR

Overview

The AMT49406GESSR is a three-phase sensorless sinusoidal BLDC MOSFET driver designed for ceiling and pole fans. It integrates code-free Field-Oriented Control (FOC) to optimize efficiency and noise performance. The device supports motor speed control via analog, PWM, or clock inputs, with optional closed-loop speed regulation. Key electrical parameters include a supply voltage range of 5.5 V to 50 V, an operating power current of 4 mA, and an output current of 5 mA. It operates within a temperature range of -40°C to +105°C and features a 24.4 kHz working frequency. The component is housed in a 24-pin QFN package with an exposed thermal pad.

Feature Summary

• Integrates proprietary non-reverse fast start technology for optimized startup from standstill, windmill, and reverse windmill states.
• Features Soft-On/Soft-Off (SOSO) functionality to ensure quiet operation during motor acceleration and deceleration.
• Provides flexible speed control interfaces supporting analog voltage, Pulse Width Modulation (PWM), and clock input modes.

Applications

• Ceiling fan motor control
• Pole fan motor control

Procurement Notes

Verify the specific suffix GESSR corresponds to the 24-QFN package with exposed thermal pad and lead-free雾锡 plating. Confirm RoHS3 compliance and MSL level 2 status for storage handling. Ensure the application circuit matches the 5.5 V to 50 V load voltage rating and 4 V to 16 V supply voltage constraints. Check for humidity sensitivity requirements during assembly.

Selection Notes

Select this component for applications requiring silent operation and high efficiency in single-phase AC powered BLDC motors. The integrated FOC algorithm eliminates the need for custom coding. Consider the analog, PWM, or clock interface options based on the host controller capabilities. The exposed pad design aids in thermal management for compact fan designs.

Part Context

This part belongs to the AMT49400 series of code-free FOC sensorless BLDC motor controllers. It is specifically engineered for fan applications where low acoustic noise and smooth torque are critical. The series offers a complete solution by combining the gate driver, FOC algorithm, and protection features in a single IC.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints and firmware if considering alternative drivers within the same manufacturer's portfolio.