LB11961V-TLM-E

Overview

The LB11961V-TLM-E is a single-phase full-wave bipolar drive motor driver designed for fan motor applications. It integrates 16V, 1.0A transistors and supports direct PWM drive systems with high efficiency. The device features a built-in variable speed function controlled by a thermistor input, enabling quiet operation with low vibration. Key electrical parameters include a minimum operating voltage of 4.5 V, a maximum operating voltage of 14 V, and a typical operating supply current of 24 mA. It operates within a temperature range of -30°C to +90°C and has a power dissipation rating of 1.1 W. The component is housed in an HSSOP-14 surface-mount package.

Feature Summary

• Single-phase full-wave drive capability with integrated high-side and low-side transistors for efficient direct PWM control.
• Built-in variable speed regulation utilizing external thermistor input for automatic thermal management.
• Integrated protection mechanisms including lock detection with automatic recovery and thermal shutdown circuits.
• Outputs for speed feedback (FG) and fault indication (RD) to support system monitoring.

Applications

• Fan motor drive systems in personal computer power supplies
• CPU cooling fan control circuits
• Quiet variable-speed ventilation systems requiring low-vibration operation

Procurement Notes

Verify the specific suffix 'TLM' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status through the latest material declaration documents provided by onsemi. Check for any product discontinuance notifications or end-of-life notices that may affect long-term availability. Ensure the sourcing channel provides valid traceability for the component batch.

Selection Notes

Select this component for applications requiring single-phase fan motor control with integrated thermal speed regulation. The HSSOP-14 package suits space-constrained surface-mount designs. Verify that the load current does not exceed the 1.0A transistor limit under worst-case thermal conditions. Ensure the control interface supports the required PWM frequency and thermistor input characteristics for optimal performance.

Part Context

The LB11961 series belongs to onsemi's portfolio of motor controllers and drivers, specifically targeting small DC fan applications. This part utilizes BCD technology to integrate power and logic functions. It is part of a family designed for cost-effective, high-efficiency solutions in consumer electronics and computing hardware where noise reduction and thermal management are critical design constraints.

Replacement Considerations

The LB11961V is the base model for this series. Cross-reference with other LB11961 variants if different packaging or pinout configurations are required. Verify functional compatibility regarding voltage levels and control signals before substituting with other single-phase fan drivers from different manufacturers.