A5947KLPTR-B-T

Motor Drivers, Controllers Overview

The A5947KLPTR-B-T is a three-phase sensorless fan driver IC from Allegro MicroSystems, designed for brushless DC motor applications. It integrates a sensorless sinusoidal drive to minimize vibration in various fan systems. The device features an integrated MOSFET structure and supports I2C and PWM interfaces for control. It includes an EEPROM for configuring speed curves and operates without external microcontrollers. The component is available in a 24-pin eTSSOP package with exposed pad.

Motor Drivers, Controllers Feature Summary

• Integrates sensorless sinusoidal drive technology to minimize mechanical vibration
• Includes built-in field-effect transistors (MOSFETs) to reduce PCB footprint
• Features programmable speed curves via internal EEPROM configuration
• Supports flexible closed-loop speed control without external microcontrollers

Motor Drivers, Controllers Applications

• Automotive seat ventilation fans
• Battery cooling systems
• ADAS GPU/CPU cooling fans
• Server and telecommunications equipment cooling

Motor Drivers, Controllers Procurement Notes

Verify the specific suffix B-T against official datasheets to confirm pinout and thermal characteristics. Ensure compatibility with I2C or PWM control schemes required by the host system. Confirm that the 24-pin eTSSOP package meets the thermal and spatial constraints of the target design. Cross-reference the AEC-Q100 qualification status if automotive reliability is mandated.

Motor Drivers, Controllers Selection Notes

Select this component for applications requiring low-vibration operation through sinusoidal driving algorithms. It is suitable for designs needing integrated power stages to simplify layout. Consider the EEPROM configurability for customizing fan performance profiles. Evaluate the package size relative to available board space and thermal dissipation requirements.

Motor Drivers, Controllers Part Context

This part belongs to the A5947 series of three-phase sensorless fan drivers. It is engineered to meet the growing demand for efficient BLDC fan drives in automotive and industrial sectors. The series utilizes proprietary zero-torque position detection and automatic phase advance for improved efficiency.

Motor Drivers, Controllers Replacement Considerations

The APEK5947GET-01-T is an evaluation board for the A5947ET variant, not a direct functional replacement. Verify pin compatibility and package differences between the eTSSOP and QFN variants before substitution.