LM3404MRX/NOPB

Overview

The LM3404MRX/NOPB is a Texas Instruments LED lighting driver IC featuring a 1.0A constant current buck regulator topology. It operates within a supply voltage range of 6V to 42V, delivering up to 40V output voltage. The device supports switching frequencies from 10kHz to 1MHz and functions in temperatures between -40°C and +125°C. Packaged in an SO-PowerPad-8, it includes an integrated high-side N-channel MOSFET switch for driving high-power LEDs.

Feature Summary

• Integrates a high-side N-channel MOSFET switch for efficient power conversion
• Provides precise constant current regulation for high-power LED applications
• Supports PWM dimming control for brightness adjustment

Applications

• Automotive interior and exterior lighting systems
• Industrial illumination fixtures
• General purpose LED lighting arrays

Procurement Notes

Verify the specific suffix 'MRX' against the manufacturer's official datasheet to confirm reel packaging specifications and tape-and-reel dimensions. Ensure the component matches the SO-PowerPad-8 package outline drawing for PCB footprint compatibility. Confirm RoHS compliance status through the latest environmental declaration documents provided by Texas Instruments prior to final procurement authorization.

Selection Notes

Select this component when designing buck converter topologies requiring fixed 1.0A output current for high-power LEDs. Consider the 42V maximum input voltage limit relative to the source supply. Evaluate thermal management requirements due to the integrated MOSFET. Compare against the LM3404HV series if input voltages exceed 42V but remain below 75V.

Part Context

This part belongs to the LM3404 family of monolithic switching regulators designed specifically for driving high-power LEDs. It represents a solution combining control logic and power stage in a single package. The device simplifies design by eliminating external sense resistors for basic operation, though external components are used for frequency setting and dimming control.

Replacement Considerations

LM3404MREVAL/NOPB (Evaluation Board variant)

FAQ

What is the maximum input voltage supported by the LM3404MRX/NOPB?

The device supports a maximum supply voltage of 42V.

Does the LM3404MRX/NOPB support PWM dimming?

Yes, the device supports PWM dimming functionality for controlling LED brightness.