LM3519MKX-20

LED Driver IC Overview

The LM3519MKX-20 is a high-frequency boost white LED driver IC manufactured by Texas Instruments. It operates within an input voltage range of 2.7 V to 5.5 V and delivers a constant output current of 20 mA per channel. The device supports switching frequencies from 2 MHz to 8 MHz, with a typical operating frequency of 5.4 MHz. It features PWM dimming control up to 30 kHz and provides overvoltage protection. The maximum output voltage is 20 V, and it functions reliably across a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Integrates a high-speed PWM brightness control interface for precise light regulation.
• Incorporates internal power switches and overvoltage protection mechanisms.
• Utilizes a boost topology to efficiently drive multiple LEDs from low-voltage sources.

LED Driver IC Applications

• LED backlighting systems
• White LED driver circuits
• Portable electronic device illumination

LED Driver IC Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with the TSOT-23-6 surface-mount footprint during PCB layout. Cross-reference the part number with the latest datasheet revision to confirm RoHS compliance and material declarations. Confirm that the 20 mA output rating aligns with the target LED array requirements.

LED Driver IC Selection Notes

Select this component for designs requiring small external passive components due to its high switching frequency capability. Consider the 2.7 V minimum input voltage for battery-powered applications. Evaluate the thermal performance within the specified -40°C to +85°C operating range. Ensure the circuit design accommodates the 20 V maximum output voltage limit for the connected LED string.

LED Driver IC Part Context

This part belongs to the LM3519 series of high-frequency boost LED drivers. It is functionally equivalent to the LM3519MK-20/NOPB but may differ in packaging or reel configuration as indicated by the 'X' suffix. The series is designed for compact LED lighting solutions requiring efficient power management and precise brightness control in space-constrained environments.

LED Driver IC Replacement Considerations

The LM3519MK-20/NOPB is a confirmed substitute part number with identical electrical characteristics. Verify package marking and reel specifications when swapping between these variants to ensure mechanical fit and handling compatibility.