LP5521YQX/NOPB

LED Driver IC Overview

The LP5521YQX/NOPB is a Texas Instruments LED lighting driver IC featuring three independent output channels designed for RGB and White LED configurations. It integrates an internal programmable memory, an I2C control interface, and a boost charge pump topology to regulate LED current. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports a switching frequency of 1.25 MHz. Each channel delivers a maximum output current of 25.5 mA. The component is housed in a QFN-24 package and functions reliably across a temperature range of -30°C to +85°C.

LED Driver IC Feature Summary

• Integrates internal programmable memory for autonomous LED sequence execution without continuous host intervention.
• Includes an integrated boost charge pump to drive LEDs requiring higher forward voltages than the supply rail.
• Utilizes I2C serial interface for precise configuration, dimming control, and status monitoring.

LED Driver IC Applications

• RGB backlighting systems for portable electronic devices
• White LED illumination drivers in mobile displays
• Programmable LED indicator arrays

LED Driver IC Procurement Notes

Verify that the specific suffix YQX corresponds to the required automotive or extended qualification grade as defined by Texas Instruments. Confirm the QFN-24 package dimensions and thermal pad requirements match the target PCB layout. Ensure the I2C address settings align with the system bus architecture before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when a design requires three synchronized LED channels with integrated power management capabilities. The internal charge pump eliminates the need for external inductors in low-voltage applications. Consider the 25.5 mA per channel limit against total load requirements. The QFN-24 footprint offers a compact solution for space-constrained mobile designs compared to larger packages.

LED Driver IC Part Context

This part belongs to the LP5521 series of LED drivers from Texas Instruments. The family includes variants such as LP5521TMX/NOPB which shares similar functional blocks but may differ in package type or specific electrical characteristics. The LP5521 series is engineered for high-efficiency LED control in consumer electronics, providing a balance between performance and integration density.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing firmware and hardware constraints before considering alternative components from other manufacturers.