LM3497MX/NOPB

Overview

The LM3497MX/NOPB is a high-voltage LED lighting driver integrated circuit manufactured by Texas Instruments. It operates within an input voltage range of 8V to 60V, supporting constant current regulation for LED strings. The device features a built-in N-channel power switch capable of delivering up to 1A of output current. It includes programmable dimming control via an external resistor or PWM signal, allowing for precise brightness adjustment. The IC incorporates comprehensive protection mechanisms such as over-temperature shutdown and open/short LED detection to ensure system reliability.

Feature Summary

• Integrated high-side N-channel power switch for efficient LED driving
• Programmable constant current control with external sense resistor
• Supports analog and PWM dimming functions for flexible brightness control
• Built-in thermal shutdown and fault protection for robust operation

Applications

• High-bay and low-bay industrial LED lighting fixtures
• Street lighting and outdoor area illumination systems
• Commercial general lighting applications requiring high voltage input
• LED downlights and track lighting modules

Procurement Notes

Verify the specific suffix MX indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the exact package type and temperature grade required for your design. Cross-reference the datasheet revision to confirm pinout and electrical characteristics align with your schematic requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring high input voltages up to 60V and single-string LED driving. Consider the internal power switch rating when determining thermal management needs. Evaluate the dimming interface requirements to choose between analog or PWM control methods. Compare against other LM349x series variants if multiple LED strings or different topologies are needed for the target application.

Part Context

The LM3497 belongs to Texas Instruments' LM349x family of non-isolated LED drivers designed for AC/DC offline applications. These devices simplify the design of high-power LED luminaries by integrating the controller and power switch in a single package. The series supports various topologies including buck, boost, and buck-boost configurations depending on the external component selection.

Replacement Considerations

LM3497M/NOPB: Same functional device but in tube packaging instead of tape-and-reel.