LEDLIGHTING
LED Street Lighting
As the next generation of lighting source, high power LEDs have a number of advantages such as power saving, efficiency and cold start. They are environment friendly and have a long life which reduces the cost of maintenance. It is reported in research that an LED lamp of 100W or so can reach the lighting intensity of a 250W high voltage sodium lamp, presenting significant power efficiency. LEDs require low voltage DC supply, and therefore AC/DC conversion is necessary if they are powered by AC mains. The power supply for LEDs should meet the following requirements:
- PF>0.9;
- Power Efficiency > 85%;
- Compliant with Energy Regulations;
- Constant Current Output;
- High Reliability;
- Surge Protection;
- Low Ripple;
- Operation Temperature -40℃ - +70℃
The requirements list above indicates that a typical LED street lighting solution have the following modules - bridge-diode, PFC, isolated DC-DC converter, LED constant current controller，and LED fixture which includes LED, Lens & heat sink. Depending on the output power, PFC may operate in either Discontinuous Conduction (DCM)，Continuous Conduction (CCM) or Critical Conduction (DRM) mode. Generally, PFC has a stable 400Vdc output to feed the isolated DC-DC converter when the input is within the range from 90V to 264V. The Isolated DC-DC converter can be either fly-back or LLC type. For the LED lamps higher than 100W, the design theory of using CCM PFC or CRM PFC and LLC isolated conversion is commonly adopted. LED constant current control can be implemented by buck, boost or buck-boost topology.
The environment in which LED street lamps will be operating should obviously be taken into consideration to ensure that adequate protection is provided.
Hover over the diagram blocks to view recommended products for this solution:
High Power LEDs Such as 1W,3W LEDs
CREE
CREE
Luxeon
Broadcom
Constant Current Controller for Driving High Power LEDs
LINEAR TECHNOLOGY
PWM Controller for Flyback Circuit
ON SEMICONDUCTOR
FAIRCHILD
Microchip
PFC Controller for Power Factor Correction Circuit
ON SEMICONDUCTOR
FAIRCHILD
Microchip
High Voltage MosFET
Click for full parts list
Rectifier Bridge
Click for full parts list
Schottky Diode
Click for full parts list
LED Heat Sink
Click for full parts list
LED Lens
Click for full parts list
Optical Coupler
Click for full parts list
LED Light Engine
Vishay
LED Optic Arrays
Ledil
Wire to Board Connectors
TE Connectivity
SSL Interconnect
and Connectors
TE Connectivity
SSL Interconnect
and Connectors
TE Connectivity
 | AC164133 - Buck/Boost Converter PICtail Plus Microchip The Buck/Boost Converter PICtail™ Plus Daughter Board provides an easy and economical way to evaluate Switch Mode Power Supply applications with the dsPIC33F GS Digital Power Conversion family. |  | 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. | |
| Image | Description |
|---|
| BROADCOM | LED | TS AlInGaP LED Amber Lamps for In-Roadway Pedestrian Crosswalk Strobe Lighting | Click here | ||
| BROADCOM | LED | IPx6 Rated Surface Mount LED | Click here | ||
| FAIRCHILD SEMICONDUCTOR | Power | Design Guideline of Single-Stage Flyback AC-DC Converter | AN-8025 | FAN7530 | Click here |
| FAIRCHILD SEMICONDUCTOR | Power | Designing Asymmetric PWM Half-Bridge Converters with a Current Doubler and Synchronous Rectifier | AN-4153 | Click here | |
| FAIRCHILD SEMICONDUCTOR | Power | Half-bridge LLC Resonant Converter Design | AN-4151 | Click here | |
| FAIRCHILD SEMICONDUCTOR | PFC Controller | Power Factor Correction (PFC) Basics | AN-42047 | Click here | |
| FAIRCHILD SEMICONDUCTOR | Power | Design of Power Factor Correction Using FAN7527 | AN-4107 | FAN7527 | Click here |
| FAIRCHILD SEMICONDUCTOR | Power | Design of Power Factor Correction Circuit Using FAN7527B | AN-4121 | FAN7527B | Click here |
| FAIRCHILD SEMICONDUCTOR | Power | Design of Power Factor Correction Circuit Using FAN7530 | AN-6027 | FAN7530 | Click here |
| FAIRCHILD SEMICONDUCTOR | Power | Single-Stage Flyback AC-DC Converter | AN-8025 | FAN7530 | Click here |
| ON SEMICONDUCTOR | Power | Solution of LED Lighting | TND370CN/D | NCP1396 | Click here |
| Microchip | PWM | Buck Configuration High Power LED Driver | AN874 Apps Note | Click here | |
| Microchip | LED DRIVER | Buck Configuration High Power LED Driver | AN874 Apps Note | Click here | |
| Microchip | PWM | Dimming Power LEDs Using a SEPIC Converter and MCP1631 | AN1261 Apps Note | Click here | |
| Microchip | PFC | Digital Power IPFC Reference Design Application Note | AN1278 Apps Note | Click here | |
| Microchip | PWM | High Power LED Flashlight Demonstration – Advanced Control and Increased Efficacy | Schematics | Click here | |
| MICROCHIP | LED driver | Offline Power Converter for High Brightness LEDs using PIC16F785 MCU | AN1271 | PIC16HV785 | Click here |
| Manufacturer | Product Type | AN Title | AN Number | Part Number | URL |
|---|
| LINEAR TECHNOLOGY | Buck LED Driver | DC842 - LT3474EFE Evaluation Kit Quick Start Guide | DC842 | LT3474 | Click here |
| LINEAR TECHNOLOGY | LED Driver | LT3476EUHF Quadruple High Power LED Driver in Buck Mode | DC976 | LT3476 | Click here |
| LINEAR TECHNOLOGY | LED Driver | DC1482A - LT3519EMS Evaluation Kit | DC1482A | LT3519 | Click here |
| Manufacturer | Product Type | Evaluation Kits Title | EVKs Part Number | Part Number | URL |
|---|
| Cree | HP LED | XLamp® XP Family LEDs | Click here | |
| Manufacturer | Product Type | Training Title | Part Number | URL |
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