According to the electricity grid rules and characteristics of the LED drive power supply requirements, the following points should be considered when choose and design LED drive power supply.
High Reliability Especially for the LED street lamp driver power supply, installed high in the air, high cost and inconvenience of maintenance;
High Efficiency LED is energy saving products, power efficiency is higher, especially for those installed inside the lamps and lanterns of the power supply is more important, because the LED luminous efficiency decrease with the increasing temperature of LEDs. The higher power efficiency, the less loss, small calorific value can reduce temperature rise in the lamps and lanterns, good for delay LED Lumens depreciation ;
Power Factor Power factor is to the requirement of load of grid, usually under 70 w electrical appliance without the requirement of the power factor. the low power factor of low power load at the same time use in large quantities, can cause serious pollution to the grid.
Drive Mode There are two main types, one is a multi-channel constant current, the other is constant voltage source for multiple constant current, power supply for each constant current source to the LED all the way;And there’s a constant current directly, LEDs in series or parallel operation.
Surge Protection Surge current refers to the power grid in a short time like “waves” caused by the high voltage large current.When the electrical equipment of some large capacity on or off the time, because there are a inductance in the power grid, will generate the surge voltage in the grid, triggering a surge current.LED because of itself characteristic, poor ability to resist surge, compressive ability, especially the reverse so join the surge protection circuit is very necessary.
Protective Circuit In addition to conventional under-voltage protection, over-voltage protection, over-current protection, best to join the temperature feedback circuit, because the LED temperature have influence on life and luminous efficiency, prevent LED temperature too high benefit LED life and prolong the droop.
Huatuo Power Company, China's LED power supply Exporter & Manufacturer, E-mail:Chauncy@huatuo168.com