LM3519MKX-20/NOPB

LED Driver IC Overview

The LM3519MKX-20/NOPB is a high-frequency boost white LED driver IC manufactured by Texas Instruments. It features an internal switch and operates within a supply voltage range of 2.7 V to 5.5 V, delivering a constant output current of 20 mA per channel with a maximum output voltage of 20 V. The device supports PWM dimming and includes overvoltage protection. It functions at frequencies between 2 MHz and 8 MHz, with a typical operating frequency of 5.4 MHz. Packaged in a SOT-23-Thin-6 (TSOT-23-6) surface-mount case, it is rated for operation from -40°C to +85°C. This component is designed for efficient LED lighting applications requiring compact solutions.

LED Driver IC Feature Summary

• Integrates a high-frequency boost converter topology with an internal power switch for space-constrained designs.
• Provides precise constant current regulation for single-channel white LED driving.
• Supports high-speed PWM brightness control for flexible display backlighting management.

LED Driver IC Applications

• Mobile phone and handheld device backlights
• Portable electronic device illumination
• Compact LED lighting modules

LED Driver IC Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official documentation, as this variant may indicate a specific packaging or tape-and-reel configuration distinct from standard versions. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability can vary significantly between stock and production runs. Ensure the ordering part number matches the exact package type and marking requirements for your assembly process.

LED Driver IC Selection Notes

Select this component when designing systems requiring a small footprint for single-channel white LED drivers. It is suitable for battery-powered devices due to its wide input voltage range and low quiescent current. Engineers should consider the thermal performance of the TSOT-23-6 package and ensure the external inductor selection supports the 2 MHz to 8 MHz switching frequency range for optimal efficiency.

LED Driver IC Part Context

This part belongs to the LM3519 series of LED lighting driver ICs from Texas Instruments. The series focuses on high-frequency operation to minimize passive component size. The 'MK' designation typically refers to the SOT-23-Thin-6 package, while 'NOPB' indicates a non-lead-free compliant version, though RoHS data suggests compliance. It serves as a specialized solution for portable electronics where board space is limited.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Users should consult Texas Instruments documentation for direct replacements or alternative package types if this specific variant is obsolete or unavailable.