The LP8556SQX-E09/NOPB is a high-brightness white LED driver from Texas Instruments, designed for backlighting and general illumination in portable and consumer electronics. This compact QFN package device supports up to six channels of programmable current sourcing, enabling precise control of LED arrays in applications requiring high luminance and efficient power management. It operates from a wide input voltage range (2.7V to 5.5V) and integrates advanced features for dimming, thermal protection, and system integration.

Key Features

This driver offers independent current control per channel (up to 40mA per LED) with ±2% accuracy and supports PWM dimming (2–255Hz) for smooth brightness adjustment. It includes integrated overvoltage, overcurrent, and thermal shutdown protection to ensure reliability under harsh conditions. The device features an I²C/SMBus interface for programmable configuration and status monitoring. Its ultra-low quiescent current (1.5µA in shutdown mode) and 1.8V logic compatibility make it ideal for battery-powered systems.

Applications

Primarily used in smartphone, tablet, and laptop displays for backlight control, the LP8556SQX-E09/NOPB is also suited for automotive interior lighting, wearable devices, and IoT-enabled smart lighting systems. Its compact size, multi-channel flexibility, and robust protection features make it a versatile solution for applications demanding high-efficiency LED driving in space-constrained environments.

Summary

The LP8556SQX-E09/NOPB combines precision LED control, wide voltage adaptability, and advanced protection mechanisms, positioning it as a leading choice for backlighting and lighting systems in consumer and industrial markets. Its programmability, low power consumption, and compact form factor enable engineers to achieve energy-efficient, reliable LED solutions in diverse applications.