LM3450AMTX/NOPB

Overview

The LM3450AMTX/NOPB is an LED lighting driver IC from Texas Instruments featuring active power factor correction and phase dimming decoder capabilities. It supports Boost and Flyback topologies with a single output capable of delivering up to 1.5 A. The device operates within a supply voltage range of 8.5 V to 20 V and offers an adjustable switching frequency between 180 Hz and 700 Hz. It provides forward phase (Triac) and reverse phase dimming support, along with thermal shutdown protection. The component is housed in a TSSOP-16 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates active power factor correction for improved line efficiency
• Supports both forward phase (Triac) and reverse phase dimming protocols
• Includes built-in thermal shutdown for enhanced system reliability
• Offers adjustable switching frequency to optimize design flexibility

Applications

• Commercial LED lighting fixtures requiring high power factor
• Residential dimmable LED downlights and bulbs
• Industrial LED panel lighting systems
• General illumination applications utilizing phase-cut dimmers

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance when sourcing. Confirm the 'X' suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure the supplier provides valid RoHS documentation matching the manufacturer's current standards. Cross-reference the Mouser part number 926-LM3450AMTX/NOPB for accurate inventory tracking. Validate that the component meets the required environmental specifications for the intended operating temperature range.

Selection Notes

Select this component for designs requiring integrated PFC and dimming control in a compact form factor. The TSSOP-16 package suits space-constrained PCB layouts. Consider the 1.5 A output current limit when sizing external components for higher power applications. The wide input voltage range allows compatibility with various DC bus configurations. Verify compatibility with existing triac or leading-edge dimmer infrastructure before finalizing the schematic.

Part Context

This device belongs to the LM3450 series of LED drivers designed for AC/DC conversion. It is manufactured by Texas Instruments under the National Semiconductor brand lineage. The component is categorized as a Driver IC within the Power Management IC family. It serves as a primary controller for isolated and non-isolated LED power supplies.

Replacement Considerations

Public confirmed substitute part numbers include LM3450AMTX-NOPB.