LED LIGHTING
LED Traffic Lights
LEDs have already replaced traditional incandescent lamps in traffic signal applications for their high efficiency, low power consumption and long life. LED Traffic Signals use both high brightness & high power LEDs connected in a combination of series and parallel to build a LED cluster. To realize specific luminous distribution intensity, an additional optical design (lenses) is necessary. If traffic signals are driven by AC power, an AC-DC circuit is required to convert AC to DC power that is suited for LED driver to drive LED cluster/string. MCU is used to implement the control over LED driver so as to give correct traffic signals.
Usually LED traffic signals are equipped with RS-485 port or wireless module (GPRS module) which is controlled by MCU to communicate with control center in a large area. In addition, as the green energy technology continues to evolve, some LED traffic signals are capable of utilizing solar energy as their power source by integrating solar panel and battery in power systems to capture and store the solar energy.
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Providing PWM signal
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Managing the LED drivers and communicate with control center.
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Drive the LED arrays with constant current
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High brightness/high power LED arrays with red, yellow and green colors.
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GSM/GPRS Module
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Bridge Rectifier
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Transformer
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 | DM330014 - LED Lighting Development Kit Microchip Microchip's Digital LED Lighting Development Kit enables designers to quickly leverage the capabilities and performances of the dsPIC33F GS series of Digital Signal Controllers (DSCs) to develop LED-lighting products. | |
 | MCP1630 Boost Mode LED Driver Demo Board Microchip The MCP1630 Boost Mode LED Driver Demo Board is a step-up, switch-mode, DC-DC converter used for power LED applications. | |
 | MCP1650 3W White LED Demo Board Microchip The MCP1650 3W White LED Demo Board demonstrates Microchip's MCP165X Boost Controller product family in a battery powered white LED application. | |
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| Image | Description |
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| Microchip | MCU | High Power LED Flashlight Demonstration – Advanced Control and Increased Efficacy | Schematics | Click here | |
| Manufacturer | Product Type | AN Title | AN Number | Part Number | URL |
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| Cree | HP LED | XLamp® Color LEDs | Click here | |
| MICROCHIP | LED Driver | Introducing the dsPIC33F GS series devices | dsPIC33FGS | Click here |
| Manufacturer | Product Type | Training Title | Part Number | URL |
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