LM3447MTE/NOPB

Overview

The LM3447MTE/NOPB is a primary-side power regulation controller designed for power factor correction and flyback applications. It operates within an input voltage range of 90 to 265 VAC and supports output currents up to 9 A. The device utilizes valley switching technology to minimize switching losses and enhance efficiency. It features integrated thermal shutdown and protection mechanisms. The component is housed in a TSSOP-14 package and functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Primary-side regulation architecture eliminates the need for optocouplers and secondary feedback circuits.
• Valley switching capability reduces switching losses during AC line cycles.
• Integrated thermal shutdown protects against overheating conditions.

Applications

• Isolated LED drivers for commercial lighting
• Residential general illumination systems
• Power factor corrected flyback converters

Procurement Notes

Verify the specific suffix 'MTE' corresponds to the TSSOP-14 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design inputs match the specified 90-265 VAC operational range to maintain performance integrity.

Selection Notes

Select this component for designs requiring high power factor without secondary sensing complexity. It is suitable for applications needing robust thermal protection and efficient valley switching. Consider the TSSOP-14 footprint constraints during PCB layout planning.

Part Context

This part belongs to the LM3447 series of primary-side regulated controllers. It is manufactured by Texas Instruments under the National Semiconductor legacy product line. The NOPB suffix indicates lead-free and RoHS-compliant manufacturing standards.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.