AMT49406GLPTR

Overview

The AMT49406GLPTR is a three-phase sensorless BLDC motor controller from Allegro MicroSystems, designed for code-free Field-Oriented Control (FOC). It operates within a supply voltage range of 5.5 V to 50 V and supports an operating temperature range of -40°C to +105°C. The device features a 24-pin TSSOP package with an exposed thermal pad. Key electrical parameters include a maximum load voltage of 50 V, a minimum power supply voltage of 4 V, and a maximum power supply voltage of 16 V. It utilizes analog, I2C, and PWM interfaces for control and configuration.

Feature Summary

• Integrates proprietary windowless sinusoidal algorithm for sensorless FOC operation without customer code.
• Provides soft-start and soft-close capabilities to ensure quiet motor operation.
• Supports multiple speed control methods including analog, PWM, and clock inputs.
• Includes built-in protection mechanisms such as over-current protection and lock detection.

Applications

• Ceiling fans
• Pole fans
• Air purifiers

Procurement Notes

Verify the specific suffix GLPTR corresponds to the 24-TSSOP-EP package when ordering. Confirm that the application environment remains within the specified -40°C to +105°C temperature range. Ensure the power supply voltage does not exceed the 50 V maximum rating. Check for moisture sensitivity level requirements during storage and handling. Validate I2C interface compatibility with the host microcontroller.

Selection Notes

Select this component for applications requiring high efficiency and low audible noise in fan systems. It is suitable for designs needing simplified development through code-free FOC implementation. Consider the TSSOP package for surface-mount assembly constraints. Evaluate the need for analog or PWM speed control signals versus digital I2C configuration. Ensure the motor type matches the three-phase BLDC specification.

Part Context

This part belongs to the AMT49400 series of QuietMotion motor drivers. It is designed to replace traditional driver solutions by integrating advanced algorithms directly into the silicon. The series targets energy-efficient appliances and cooling systems. It offers a drop-in replacement capability for existing designs while improving acoustic performance.

Replacement Considerations

The AMT49406GESSR serves as a functional alternative with an identical electrical profile but utilizes a 24-QFN package instead of TSSOP. Verify pinout compatibility and thermal management requirements when substituting between these package types.

FAQ

Does the AMT49406GLPTR require external sensors for commutation?

No, it is a sensorless controller that uses embedded algorithms for commutation.

What interfaces are supported for configuring motor parameters?

It supports an I2C interface for setting parameters such as rated voltage, current, and speed.