LB11693-E

Overview

The onsemi LB11693-E is a three-phase fan motor driver designed for precise speed control and thermal management. It operates within a supply voltage range of 8 V to 28 V, delivering an output current of 1.8 A per phase. The device supports surface mount installation in an HSOP-36R package and functions reliably across an extended temperature range from -40°C to +85°C. With a maximum power dissipation of 900 mW and a 5.3 V output capability, it integrates essential protection features for robust operation in compact electronic systems requiring efficient three-phase motor driving.

Feature Summary

• Provides dedicated three-phase drive capability for fan motors with integrated control logic
• Supports surface mount technology for automated assembly and space-constrained designs
• Operates within wide industrial temperature ranges ensuring reliability under varying conditions

Applications

• Computer cooling fan systems
• Server chassis ventilation modules
• Consumer electronics thermal management units

Procurement Notes

Verify the exact suffix configuration against the manufacturer's official datasheet to ensure compatibility with specific packaging or tape-and-reel requirements. Confirm that the HSOP-36R footprint matches the target PCB layout dimensions. Check for any moisture sensitivity level precautions during storage and handling procedures as indicated in the component specifications.

Selection Notes

Select this component when a dedicated three-phase driver is required for low-power fan applications. Ensure the system voltage remains within the 8 V to 28 V operational window. Verify that the 1.8 A output current meets the motor load requirements without exceeding the 900 mW power dissipation limit under worst-case thermal conditions.

Part Context

This part belongs to the LB11693JH series of fan motor controllers. It serves as a specialized solution for managing three-phase brushless fans commonly found in computing and communication equipment. The design focuses on simplifying motor drive circuits by integrating necessary gate drivers and control logic into a single compact package.

Replacement Considerations

Consult the official obsolescence notice for approved substitute part numbers. Direct replacements must maintain identical pinout configurations and electrical characteristics to ensure board-level compatibility without redesign.