LM3445MX/NOPB

Overview

The LM3445MX/NOPB is a Triac-dimmable off-line LED driver IC manufactured by Texas Instruments. It utilizes a buck topology to regulate current for LED loads. The device supports an input voltage range of 8 V to 12 V and delivers a maximum output current of 1 A. It operates within a switching frequency range of 30 kHz to 1 MHz. The component is housed in a 14-pin SOIC package and is rated for operation between -40°C and +125°C.

Feature Summary

• Supports forward phase (Triac), PWM, and reverse phase dimming operations
• Features adjustable switch frequency for flexible design optimization
• Includes enable/shutdown control and thermal shutdown protection

Applications

• Commercial lighting systems
• Industrial lighting fixtures
• Residential solid-state lighting applications

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics match the intended design requirements. Ensure the operating environment stays within the specified temperature range. Confirm RoHS compliance status through manufacturer documentation before integration into final products.

Selection Notes

Select this component for designs requiring integrated Triac dimming compatibility without external controllers. The wide input voltage range suits various low-voltage AC-DC conversion stages. Consider the SOIC-14 package size for board space constraints and verify thermal management capabilities for high-current LED strings.

Part Context

This part belongs to the LM3445 series of constant-current LED drivers designed for off-line applications. It integrates power switching and control logic to simplify LED ballast designs. The NOPB suffix indicates lead-free manufacturing compliant with environmental directives.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pin-to-pin compatibility and electrical parameter alignment before replacing existing components in production.