LM3420M5-16.8/NOPB

Battery Chargers Overview

The LM3420M5-16.8/NOPB is a constant current LED driver from Texas Instruments designed for high-side switching applications. It operates with an input voltage range of 4.5V to 40V and supports output currents up to 1A. The device integrates a precision 16.8V reference, enabling accurate regulation without external feedback dividers. Key electrical parameters include a switching frequency adjustable via an external resistor, typically ranging from 200kHz to 1MHz. It features thermal shutdown and overcurrent protection within an SOT-23-5 package.

Battery Chargers Feature Summary

• Integrates a fixed 16.8V internal reference for simplified design
• Supports high-side N-channel MOSFET driving
• Includes thermal shutdown and cycle-by-cycle current limiting

Battery Chargers Applications

• High-brightness LED lighting modules
• Automotive exterior lighting systems
• Industrial indicator lamps

Battery Chargers Procurement Notes

Verify the specific suffix 'M5' corresponds to the SOT-23-5 package variant when sourcing. Confirm that the 'NOPB' designation indicates lead-free and RoHS compliance as per manufacturer standards. Cross-reference the full part number against official TI databases to ensure availability status and correct pinout configuration for your PCB layout.

Battery Chargers Selection Notes

Select this component when a fixed 16.8V LED string drive is required. Ensure the input supply voltage exceeds the LED forward voltage plus the dropout voltage. Verify that the external MOSFET can handle the peak current and power dissipation. Check that the desired switching frequency falls within the supported range defined by the timing resistor selection.

Battery Chargers Part Context

This part belongs to the LM3420 family of constant current regulators. It is specifically engineered for driving LED strings where a fixed voltage drop across the load is beneficial. The M5 suffix denotes the small outline transistor package, suitable for space-constrained designs compared to larger packages like DPAK or SOIC.

Battery Chargers Replacement Considerations

Check for direct equivalents in the LM342x series with different voltage references if the 16.8V constraint is flexible. Verify pin compatibility before substituting with other LED drivers from Texas Instruments or third-party manufacturers.