This wi-fi module permits for prolonged connectivity, enabling management of a number of lighting nodes inside a 6LowPAN mesh community.
LED avenue and zone lighting purposes demand energy provides that aren’t solely sturdy and extremely environment friendly but additionally able to delivering tightly regulated output currents and voltages. To make sure power effectivity and compliance with fashionable requirements, these energy provides should exhibit a excessive energy issue (PF), low whole harmonic distortion (THD), and minimal voltage ripple. Within the realm of good out of doors lighting, sub-1 GHz wi-fi connectivity is a well-liked selection for dependable communication over lengthy distances.
Addressing these wants, the SL-LLL008V1 answer from ST Microelectronics combines a high-efficiency energy structure with built-in wi-fi connectivity. The facility provide is designed utilizing a dual-stage method. The front-end AC/DC converter is a excessive energy issue flyback stage constructed across the STF23N80K5 N-channel MOSFET and managed by the HVLED001B LED driver. This configuration ensures wonderful energy issue correction, low harmonic distortion, and fixed voltage regulation utilizing primary-side suggestions, eliminating the necessity for optocouplers.
The second energy stage options an inverse buck converter utilizing the STL4N10F7 MOSFET, pushed by the HVLED002 controller. This stage interprets exterior dimming instructions into exact present management, enabling dynamic mild depth changes. Digital management is dealt with by the ultra-low-power STM32L071KZ microcontroller, which helps distant instructions reminiscent of ON/OFF and dimming through the built-in SPSGRFC sub-1 GHz transceiver module.
The answer is complemented by the ST 6LowPAN Sensible Streetlight cellular app, which permits customers to regulate lighting capabilities—together with ON/OFF and brightness adjustment—of all related nodes by way of a Knowledge Concentrator Unit (DCU) utilizing Bluetooth.
Key elements on this system embrace the HVLED001B controller, which makes use of superior peak present mode management for HPF flyback topologies. Its high-voltage startup and monitoring capabilities cut back exterior element depend. The STF23N80K5 MOSFET, constructed on MDmesh™ K5 expertise, affords low on-resistance and ultra-low gate cost for superior effectivity. In the meantime, the HVLED002 ensures secure current-mode LED driving, and the STL4N10F7 STripFET™ F7 MOSFET enhances switching pace and reduces energy losses.General, the SL-LLL008V1 is a high-performance good lighting answer that gives effectivity, scalability, and wi-fi management, making it perfect for contemporary, related avenue lighting programs.
ST Mircoelectronics has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) format, and extra. The corporate’s web site has further knowledge in regards to the reference design. To learn extra about this reference design, click on right here.
