The A4964KJPTR-T is a complete fan driver IC from Allegro MicroSystems designed to drive single-coil brushless DC (BLDC) cooling fans. It integrates control and drive circuitry into a single package, simplifying fan driver design and reducing component count. This IC is designed to provide efficient and quiet operation for BLDC fans used in a variety of applications.

Applications

• Desktop computers
• Laptop computers
• Servers
• Power supplies
• Projectors
• Automotive electronics

Features

• Single-coil BLDC fan driver
• Integrated Hall-effect sensor
• Low noise operation
• Soft switching
• Overcurrent protection
• Locked rotor protection

Benefits

• Simplifies BLDC fan driver design
• Reduces component count and board space
• Provides quiet and efficient fan operation
• Protects the fan and driver from damage
• Enhances system reliability
• Extends fan life

Additional Details

The A4964KJPTR-T integrates a Hall-effect sensor for rotor position sensing, eliminating the need for external sensors. The soft switching feature reduces audible noise and electromagnetic interference (EMI). The IC incorporates overcurrent protection to prevent damage from excessive current draw, and locked rotor protection to shut down the driver in case the fan becomes stalled. Key specifications include operating voltage range, output current capability, and switching frequency. Allegro MicroSystems provides detailed datasheets including application notes and thermal performance information for this fan driver IC. The IC is typically offered in a small surface mount package. Proper thermal management is essential to ensure reliable operation at higher ambient temperatures.