LB11961V-MPB-E

Overview

The LB11961V-MPB-E is a single-phase bipolar drive motor driver designed for direct PWM motor drive systems. It integrates 16V, 1.0A transistors and operates within a supply voltage range of 4.5V to 14V. The device features a built-in variable speed function controlled by a thermistor input, enabling quiet, low-vibration control. It includes a regenerative diode, lock protection with automatic recovery, thermal shutdown, and outputs for speed detection (FG) and lock detection (RD). The component is housed in an HSSOP-14 package.

Feature Summary

• Single-phase full-wave drive with integrated high-side transistors
• Built-in variable speed control via thermistor input
• Integrated lock protection and automatic recovery circuits
• Thermal shutdown circuit for overtemperature protection

Applications

• Fan motor drive in personal computer power supply systems
• CPU cooling fan systems
• Direct PWM motor drive applications requiring efficient single-phase control

Procurement Notes

Verify the specific suffix -MPB-E against official onsemi documentation to confirm package type and tape/reel specifications. Confirm current availability status as some variants may be subject to discontinuation or production suspension notices. Ensure compliance with RoHS requirements and moisture sensitivity levels prior to procurement.

Selection Notes

Select this component for applications requiring simple single-phase fan motor control with minimal external components. The integrated thermistor input simplifies variable speed implementation. Consider the 1.0A output capability and 16V rating when matching load requirements. Verify that the HSSOP-14 package fits the PCB layout constraints.

Part Context

The LB11961 series is designed for efficient fan motor driving in computing and consumer electronics. This variant belongs to the broader family of single-phase drivers optimized for CPU cooling and power supply fans. It replaces older discrete solutions by integrating drive, protection, and control functions into a single IC.

Replacement Considerations

Check for direct pin-compatible replacements within the LB11961 family. Verify if alternative packages offer identical electrical characteristics. Consult onsemi for updated lifecycle status and recommended alternatives if this part is discontinued.