The LP5009RUKR is a high-efficiency LED driver from Texas Instruments, designed for backlighting applications in mobile devices, displays, and general lighting. This device supports a wide input voltage range of 2.7V to 24V and delivers a programmable output current up to 1.2A per channel, with a configurable constant-current (CC) or constant-voltage (CV) mode. It integrates a synchronous buck converter for high efficiency (up to 95%) and features a compact 10-pin QFN (3.5 mm × 3.5 mm) package, enabling space-saving designs in thin-profile devices like smartphones and tablets.

Key Features

The LP5009RUKR offers a wide dimming range via PWM (up to 1000:1) or analog control, ensuring smooth brightness adjustment. It includes integrated protections such as overcurrent, short-circuit, overvoltage, and thermal shutdown, enhancing reliability in harsh environments. The driver supports programmable output voltage (up to 24V) and current accuracy of ±3%, ensuring uniform LED illumination. Its low quiescent current (15 µA in shutdown mode) extends battery life in portable devices. The device operates over an extended temperature range (-40°C to +125°C) and integrates soft-start and frequency modulation to minimize EMI.

Applications

Primarily used in mobile electronics, the LP5009RUKR is critical for backlighting in smartphones, tablets, and wearable displays. It is widely employed in automotive interior lighting, industrial panels, and IoT devices requiring energy-efficient LED control. Its flexibility in voltage/current settings also suits LED strip lighting, signage, and smart home appliances where compact size and high efficiency are essential.

Summary

The LP5009RUKR combines high efficiency, precise LED control, and robust protection features, making it a versatile solution for backlighting and general lighting applications. Its compact form factor, wide input/output range, and low power consumption cater to engineers designing battery-powered or space-constrained systems demanding reliable and dimmable LED illumination. This driver is ideal for applications balancing performance, cost, and energy efficiency in consumer, industrial, and automotive markets.