LB11967V-W-AH

Overview

The LB11967V-W-AH is a single-phase bipolar variable speed fan motor pre-driver manufactured by onsemi. It operates with an external PWM signal to drive large-scale fan motors in servers and consumer products. The device supports 12V, 24V, and 48V power supplies. Key electrical parameters include a supply voltage range of 6 V to 16 V, a maximum power dissipation of 800 mW, and a working supply current of 14 mA. It functions within a temperature range of -30°C to +95°C and is housed in an SSOP-J-20 surface-mount package.

Feature Summary

• Integrates chopper-type current limiting at start and reactive current cutting for silent operation
• Supports separate-excited upper direct PWM control for highly silent variable speed regulation
• Includes lock protection, automatic reset, and rotation speed detection outputs

Applications

• Server cooling systems requiring large air volume fans
• Consumer product cooling applications
• Variable speed fan motor control circuits

Procurement Notes

Verify the specific suffix 'W-AH' against the official datasheet to confirm pinout compatibility and marking specifications. Confirm RoHS compliance status and moisture sensitivity levels prior to integration. Ensure the design accounts for the 800 mW power dissipation limit and the specified operating temperature range of -30°C to +95°C.

Selection Notes

Select this component when designing single-phase full-wave drive circuits for large fan motors. It is suitable for applications requiring low-saturation output using external PNP-EMOS transistors. Consider the minimum speed setting capability via external resistors and the need for Hall bias constant-voltage outputs when evaluating system requirements.

Part Context

This part belongs to the LB11967V series of motor controllers and drivers. It serves as a pre-driver stage, utilizing external power transistors rather than integrating high-current output stages internally. This architecture allows for flexible implementation of high-efficiency drives while maintaining low power consumption and quiet operation characteristics.

Replacement Considerations

Check for exact suffix matches in the LB11967V family. Verify pin-to-pin compatibility if substituting with other variants. Ensure the replacement supports the same 12V/24V/48V supply options and PWM frequency requirements.