ST release plug and play LED street lamp design

Across multiple electronic applications, semiconductor supplier STMicroelectronics leader (STMicroelectronics, referred to as ST) launched LED lights a complete and configurable solution that enables developers to develop and efficient control of the adjustable high brightness LED street light series (the 100W). The plug lamp design based on STLUX385A digital power controller STMicroelectronics award-winning, this product can optimize the LED efficiency and emergence in the idle state to minimize the functional properties of power in any light condition.

Global cities, towns and rural street lighting power consumption is huge, LED lamp to replace the existing incandescent lamp, low pressure sodium lamp and high intensity discharge lamp is widely considered to be the most promising way to reduce the energy consumption of public lighting. Compared with the early lighting technology, high energy efficiency is the inherent advantage of LED lamp, more importantly, LED brightness can be adjusted. When combined with the intelligent power supply, the LED lighting system can automatically adjust the brightness output according to the ambient light. In addition, LED street lamps can also meet the municipal lighting requirements, such as in the specified time to adjust brightness.

Many cities in the world began to use LED technology to transform existing streetlights, more cities are planning to upgrade the street lamps. In Boston, Massachusetts, for example, the city has a total of 64000 street lights, by the end of 2012, 40% of the street lights have switched to LED technology, the annual cost savings of $2 million 800 thousand, which is about 35% of the old cost reduction.

Said STMicroelectronics division vice president of industrial application and power conversion products division general manager Matteo Lo Presti: "numerical control is the key equipment energy saving lighting outdoor lighting, LED street lamp power STMicroelectronics solutions in a future oriented product platform integration in the 25 years of development experience with the gradual increase of conversion; intelligent power grid, the city will be able to control the lamp by saving more energy, because STLUX385A integrates all the main communication protocol. "

The reference design includes all principle diagram, BOM and firmware list allows designers to use STMicroelectronics world's first general lighting and power conversion STLUX385A digital controller of the rapid development of 100W LED lamp digital power controller. In this solution, the STLUX385A controller is responsible for handling the primary side power conversion stage and all the communication links. The power conversion stage consists of a PFC voltage regulator, followed by a zero voltage switching (ZVS) LC resonant stage. High precision dimming function using primary side voltage regulator (PSR) control technology.

The display board provides all the important communication interfaces, for example, DALI (Digital Addressable Lighting Interface, digital addressable lighting interface), isolation of 0-10 and UART, all communication functions are managed by STLUX385A. STLUX385A is extremely flexible to connect to other interfaces, such as Wi-Fi, power line modem, Bluetooth and ZigBee.