The LB1965M-TLM3 is a 3-phase brushless motor driver IC manufactured by SANYO Semiconductor. This integrated circuit is designed for driving brushless DC motors with sinusoidal waveforms, providing smooth and efficient motor control. It incorporates features like built-in hall amplifiers, PWM control, and various protection circuits.

Applications

• Fan motors for cooling systems in computers, servers, and other electronic devices.
• Spindle motors in optical drives (CD/DVD/Blu-ray).
• Small pumps for fluid circulation.
• Various other applications requiring precise and efficient brushless DC motor control.

Features

• 3-Phase Sinusoidal Drive: Provides smooth and efficient motor control, reducing noise and vibration.
• Built-in Hall Amplifiers: Simplifies the design and reduces external component count.
• PWM Control: Allows for precise speed control and current limiting.
• Built-in Protection Circuits: Includes over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown (TSD) to ensure safe operation.
• Soft Switching: Reduces EMI noise.
• FG (Frequency Generator) Output: Provides a signal for monitoring motor speed.

Benefits

• Improved Motor Efficiency: Sinusoidal drive minimizes losses and maximizes motor efficiency.
• Reduced Noise and Vibration: Smooth motor operation minimizes audible noise and mechanical vibration.
• Simplified System Design: Integrated features reduce the need for external components, simplifying system design and reducing cost.
• Enhanced Reliability: Built-in protection circuits prevent damage to the IC and motor, increasing system reliability.
• Precise Speed Control: PWM control enables accurate and responsive speed adjustments.

Additional Details

The LB1965M-TLM3 typically operates from a single power supply voltage. The specific voltage range and other electrical characteristics can be found in the device datasheet. It is packaged in a small surface-mount package, making it suitable for compact applications. The IC's internal circuitry includes a pre-driver stage, gate drivers for the external MOSFETs (which drive the motor windings), and control logic for managing the commutation sequence. The sinusoidal drive is implemented by generating PWM signals that approximate sinusoidal waveforms for each of the three phases.