LM3502SQ-16/NOPB

LED Driver IC Overview

The LM3502SQ-16/NOPB is a step-up DC-DC converter designed for white LED applications. It features two independent output channels with a maximum switch current of 400 mA. The device operates from a supply voltage range of 2.5 V to 5.5 V and supports a switching frequency of 1 MHz. It utilizes a 16-pin WQFN package (4x4 mm) and functions within a temperature range of -40°C to +85°C or +125°C depending on specific variant ratings.

LED Driver IC Feature Summary

• Dual-output architecture supporting independent channel control
• Integrated PWM dimming capability for brightness regulation
• Compact 16-pin WQFN footprint suitable for space-constrained designs

LED Driver IC Applications

• White LED backlighting systems
• Portable electronic display illumination
• Mobile device lighting circuits

LED Driver IC Procurement Notes

Verify the exact operating temperature grade (+85°C vs +125°C) against the specific datasheet revision, as variations exist within the LM3502 family. Confirm that the NOPB suffix indicates lead-free status compliant with RoHS standards. Ensure the 16-WQFN package dimensions match the target PCB layout requirements before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when dual-channel LED driving is required with high efficiency at low input voltages. The 1 MHz switching frequency allows for smaller external inductors compared to lower-frequency alternatives. Consider the thermal performance limits if operating near the upper junction temperature boundary in enclosed environments.

LED Driver IC Part Context

This part belongs to the LM3502 series of LED drivers from Texas Instruments. It is distinct from the LM3503 series, which may offer different pin configurations or current capabilities. The SQ-16 designation specifically refers to the 16-lead WQFN package type used for surface-mount assembly.

LED Driver IC Replacement Considerations

Check for direct cross-reference parts within the same TI LED driver portfolio. Verify compatibility of pinouts and electrical parameters if substituting with other manufacturers' boost converters designed for LED applications.