The BA6840BFS is a 3-phase brushless DC motor driver IC from Rohm Semiconductor. This IC is designed to efficiently drive 3-phase brushless DC motors, incorporating multiple protection features for reliable operation and simplified design. It is suitable for a range of applications requiring precise and efficient motor control.

Applications

• Fan Motors
• Hard Disk Drives (HDDs)
• Optical Disk Drives
• Small Pumps
• Robotics
• Industrial Equipment

Features

• 3-Phase Brushless DC Motor Driver: Drives 3-phase brushless DC motors with high efficiency.
• 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.
• Overcurrent Protection (OCP): Protects the motor and driver from overcurrent 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 3-phase brushless DC 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 motor 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 BA6840BFS operates with a wide supply voltage range, typically between 5V and 24V. The PWM control input allows for precise speed adjustments. The integrated Hall sensor amplifier enhances the accuracy of the motor control. The device includes OCP, 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.