Networked LED Street Light Intelligent Control System Based on AMIS-49587

For LED street lighting, two-way communication can be applied between the centralized control center and the street lights to build a fully networked intelligent street lighting system. In this way, government agencies, power companies or business groups can remotely adjust the light output of LED street lights, thereby reducing the overall energy consumption of the street lighting network and reducing expenses. In addition, ambient light sensors can be integrated into the system to automatically adjust the light output of the LED according to the brightness of the ambient light, thereby helping to save energy.

Fortunately, designers can easily build a networked LED street light intelligent control system based on power lines using ON Semiconductor's AMIS-49587 power line carrier (PLC) modem, PLC line driver NCS5650 and ambient light sensors such as NOA1302 (Figure 4). Among them, ON Semiconductor's ambient light sensors include output types, such as NOA1302 and NOA1305 provide digital output, while NOA1211 is analog output. These light sensors have extremely low operating currents of only 58 μA, 550 μA and 115 μA respectively at 100 lumens of light output, so the impact on system energy efficiency is minimal.

Figure 4: Networked LED street light intelligent control system based on AMIS-49587 and other devices.