The BA6424AFS is a single-phase fan motor driver IC manufactured by Rohm Semiconductor. This IC is designed to efficiently drive single-phase fan motors commonly found in various electronic devices. It integrates various protection features, ensuring reliable operation and simplified design.

Applications

• Cooling Fans in Electronic Devices
• CPU Coolers
• Power Supply Fans
• Air Purifiers
• Small Appliances
• Projectors

Features

• Single-Phase Fan Motor Driver: Specifically designed for driving single-phase fan motors.
• Built-in Hall Sensor Amplifier: Simplifies motor control system design by integrating the Hall sensor amplifier.
• PWM Speed Control: Allows precise speed control using Pulse Width Modulation (PWM).
• Soft Switching: Reduces noise and improves efficiency.
• Locked Rotor Protection (LRP): Protects the motor and driver from locked rotor conditions.
• Overtemperature Protection (OTP): Protects the driver from thermal damage.
• Undervoltage Lockout (UVLO): Prevents operation under insufficient voltage conditions.

Benefits

• Efficient Motor Control: Optimized for driving single-phase fan motors with high efficiency.
• Simplified Design: Integrated Hall sensor amplifier and protection features reduce external component count.
• Precise Speed Control: PWM speed control enables accurate adjustment of fan speed.
• Enhanced Reliability: Built-in protection features ensure reliable operation under various conditions.
• Reduced Noise: Soft switching minimizes noise and improves system performance.

Additional Details

The BA6424AFS operates with a wide supply voltage range, typically between 8V and 26V. The PWM control input allows for precise speed adjustments. The integrated Hall sensor amplifier enhances the accuracy of the motor control. The device includes LRP, OTP, and UVLO protection features, ensuring robustness and preventing damage under fault conditions. It is available in a compact HSOP package, which contributes to a reduced PCB footprint. Soft switching technology minimizes acoustic noise and electrical noise, making it suitable for noise-sensitive applications.