The LB11970FV is a 3-phase brushless DC motor driver IC manufactured by SANYO Semiconductor. It's designed for applications requiring precise and efficient motor control. This IC integrates various control and protection functions, making it a compact and reliable solution for motor driving.

Applications

• Fan motors in computers and servers
• Air conditioner fan motors
• Refrigerators
• Pumps
• General purpose 3-phase BLDC motor control

Features

• 3-phase full-wave drive
• Built-in soft switching circuit
• Variable speed control via PWM input
• Built-in locked rotor protection
• Built-in thermal shutdown protection

Benefits

• Reduced noise and vibration due to soft switching
• Precise speed control for optimal performance
• Protection against motor damage due to locking
• Protection against overheating
• Simplified circuit design due to integrated functions

Technical Specifications

The LB11970FV operates with a supply voltage between 7V and 24V. The output current is typically 1.5A. The PWM frequency ranges from 20kHz to 100kHz. The operating temperature range is -20°C to +85°C. The package is a TSSOP-24. The locked rotor protection function automatically stops the motor when it detects a locked rotor condition, preventing damage to the motor and the driver IC. The thermal shutdown protection function protects the IC from overheating by shutting down the output when the junction temperature exceeds a certain threshold.

The soft switching circuit reduces switching noise and electromagnetic interference (EMI), making it suitable for noise-sensitive applications. The PWM input allows for precise speed control of the motor, enabling optimal performance in various operating conditions. The integrated protection functions enhance the reliability and longevity of the motor and the driver IC.

The LB11970FV is a versatile and reliable solution for 3-phase brushless DC motor control, offering a combination of performance, protection, and ease of use.