LED Ring Lighting Patterns Reference Design

This design gives an environment friendly and visually compelling resolution for various HMI functions, leveraging superior LED driver and sensor applied sciences.

This reference design TIDA-050011 by Texas Devices (TI) enhances human-machine interface (HMI) functions with an LED ring powered by two LP5024 LED drivers, delivering vivid and dynamic lighting patterns. It successfully addresses challenges generally confronted by units requiring intricate lighting patterns and a secure voltage provide. Moreover, the design incorporates analog dimming for the LP5024 LED drivers, making certain constant distinction ratios even in dynamically altering ambient lighting circumstances.

The LP5024 permits high-quality lighting patterns by means of 12-bit, 29-kHz PWM dimming and is managed through an I2C interface. Its ultra-low standby present, as little as 10 µA, mixed with an computerized power-saving mode, ensures vitality effectivity. Programmable RGB banks simplify software program management, and the system dynamically adjusts brightness primarily based on ambient gentle sensing, making it very best for sensible functions. These capabilities make it well-suited to be used in units comparable to sensible audio system with voice help, equipment person interfaces, video doorbells, digital sensible locks, wearable AR/VR units, printers, online game consoles, and WLAN/Wi-Fi entry factors.

On the core of this design is the LP5024, a 24-channel fixed current-sink LED driver. It improves person experiences by simplifying colour mixing and brightness management, supporting each real-time results and environment friendly coding. Its optimized efficiency for RGB LEDs makes it a major selection for HMI functions. This performance is complemented by the SimpleLink™ MSP‑EXP432P401R LaunchPad™ improvement package, which facilitates high-performance, low-power operations. The LaunchPad includes a 48-MHz Arm® Cortex®-M4F processor, low energetic energy consumption of 80-μA/MHz, and a 660-nA RTC operation, together with superior options like a 14-bit, 1-MSPS differential SAR ADC and AES256 accelerator. All pins are simply accessible for streamlined integration.

As well as, the OPT3001 sensor measures seen gentle depth with a spectral response carefully matching the human eye’s photopic response and contains important infrared rejection. This sensor dynamically adjusts brightness primarily based on ambient lighting, optimizing the LP5024’s analog present and register configurations to generate clean dimming and vibrant lighting results.

Two LP5024 drivers handle a 16-RGB-LED module with fixed present management and seamless dimming. The ambient gentle knowledge captured by the OPT3001 sensor permits the MSP‑EXP432P401R LaunchPad to ship exact PWM management alerts, dynamically adjusting the LP5024 present to create various lighting patterns. Energy for the LEDs is sourced both from an exterior DC energy provide or the three.3V output of the LaunchPad. Purple LEDs, with a decrease ahead voltage of 1.8V, scale back energy dissipation. Configuration is additional supported by means of jumper settings for enhanced flexibility.

Its lab-verified efficiency, broad compatibility, and ease of implementation make it a superb selection for engineers engaged on high-performance networking and communication methods.TI has completely examined this reference design, making certain its reliability and efficiency. The design package deal features a invoice of supplies (BOM), schematics, meeting drawings, printed circuit board (PCB) layouts, and extra assets on the TI web site.For extra info, click on right here.