LM3570SD/NOPB

LED Driver IC Overview

The LM3570SD/NOPB is a single-channel LED driver IC manufactured by Texas Instruments. It utilizes a fixed 500 kHz switching frequency to regulate current for high-brightness LEDs. The device operates within an input voltage range of 3V and supports output currents up to 20mA. It is housed in a compact 14-WFDFN exposed pad package designed for surface mount applications. The component functions efficiently across a wide ambient temperature range from -40°C to +85°C, making it suitable for portable electronics.

LED Driver IC Feature Summary

• Integrates a constant current regulator optimized for driving high-brightness LEDs
• Utilizes a fixed 500 kHz switching frequency to minimize external passive component size
• Features a compact 14-WFDFN package with an exposed thermal pad for efficient heat dissipation

LED Driver IC Applications

• Mobile device backlighting systems
• Portable electronic equipment illumination
• Consumer product LED lighting solutions

LED Driver IC Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the package designation matches the 14-WFDFN exposed pad outline drawing. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision date to ensure compatibility with current design specifications.

LED Driver IC Selection Notes

Select this component when a single-channel, low-current LED driver is required for space-constrained designs. The fixed 500 kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 20mA output limit when sizing for multiple parallel LED strings or higher brightness requirements. Evaluate the thermal performance of the WFDFN package relative to the PCB copper area available for heat spreading.

LED Driver IC Part Context

This part belongs to the Texas Instruments LM3570 family of LED drivers. It is distinct from the LM3370 series, which are dual synchronous step-down DC-DC converters. Unlike the LM3578, which offers three independent outputs, the LM3570 provides a single regulated channel. It serves as a specialized solution for backlighting rather than general-purpose power regulation.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.