LB11961V-MPB-H

Overview

The LB11961V-MPB-H is a single-phase bipolar drive motor driver designed for direct PWM motor drive systems. It integrates 16V, 1.0A transistors and features a built-in variable speed function controlled by a thermistor input. The device supports quiet, low-vibration operation via externally clocked high-side transistor direct PWM drive. Key internal circuits include regenerative diodes, lock protection with automatic recovery, thermal shutdown, and outputs for speed detection (FG) and lock detection (RD).

Feature Summary

• Single-phase full-wave drive capability with integrated power transistors.
• Built-in variable speed control utilizing thermistor input signals.
• Integrated lock protection circuitry with automatic recovery functionality.
• Comprehensive protection features including thermal shutdown and regenerative diodes.

Applications

• Fan motor drive in personal computer power supply systems
• CPU cooling fan systems
• Quiet variable speed control applications requiring low vibration

Procurement Notes

Verify the specific suffix 'MPB-H' against official onsemi documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage levels and thermistor interface requirements. Confirm RoHS compliance status through current datasheets or compliance reports prior to procurement.

Selection Notes

Select this component for single-phase fan motor applications requiring integrated PWM drive and thermal management. Consider the built-in thermistor input for simplified speed control loops. Evaluate the lock detection output for system reliability monitoring. Verify that the 1.0A current rating meets the load requirements of the target fan motor.

Part Context

This part belongs to the LB11961 series of single-phase bipolar drive motor drivers. It is optimized for cooling fan applications in computing hardware. The device simplifies design by integrating power switches, protection circuits, and control logic into a single package, reducing external component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official cross-reference guides or distributor catalogs for verified alternatives if this specific suffix is unavailable.

FAQ

How is the motor speed controlled?

Speed is controlled via a built-in variable speed function that accepts input from an external thermistor.

What protection features are included?

The device includes built-in thermal shutdown, lock protection with automatic recovery, and regenerative diodes.