LM3519MK-20

LED Driver IC Overview

The LM3519MK-20/NOPB is a high-frequency boost white LED driver from Texas Instruments, designed for driving 2 to 4 LEDs at a constant current of 20 mA. It operates within an input voltage range of 2.7 V to 5.5 V and supports switching frequencies up to 8 MHz. The device features PWM dimming control with capabilities up to 30 kHz and includes overvoltage protection. Packaged in a compact SOT-23-Thin-6 (TSOT-23-6) format, it achieves peak efficiency exceeding 80% while requiring minimal external components, such as a 1 µH inductor.

LED Driver IC Feature Summary

• Integrates internal switch and high-speed PWM brightness control for efficient LED regulation
• Provides overvoltage protection to safeguard connected LED loads
• Supports wide input voltage ranges suitable for battery-powered applications

LED Driver IC Applications

• Backlighting for portable electronic devices
• White LED illumination systems
• Battery-operated lighting modules

LED Driver IC Procurement Notes

Verify the specific suffix 'NOPB' confirms RoHS compliance and lead-free status when ordering. Confirm the '-MK-' package designation matches the required TSOT-23-6 thin profile for your PCB layout. Ensure the '20' current rating aligns with your LED string requirements. Cross-reference the manufacturer part number with distributor codes to avoid packaging discrepancies.

LED Driver IC Selection Notes

Select this component for designs requiring a single-channel boost converter with integrated switching capability. It is suitable for applications needing precise 20 mA constant current regulation. Consider the TSOT-23-6 package size for space-constrained layouts. Verify that the operating temperature range of -40°C to +85°C meets environmental specifications.

LED Driver IC Part Context

This part belongs to the LM3519 series of high-frequency boost LED drivers. It is manufactured by Texas Instruments and serves as a solution for driving multiple white LEDs from low-voltage sources. The device integrates power switches to reduce external component count compared to discrete solutions.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.