The problem of application of switching power supply in LED lighting

Range of use

LED switching power supply is widely used in LED display (single door screen, Quan Caiping (LED), LED lighting, LED street lamps lighting (LED), guardrail tube, wall wash lights, advertising light box) to provide power supply for all types of constant voltage, constant current, low voltage current security, green, health

Power supply problems in application

A.Using parameters. Purchasing power mainly depends on the voltage range of constant current and constant flow in the choice of. The constant current value selection standard current LED offset. Voltage range should be selected appropriately, try not to choose a larger scope to avoid the waste of power

B.The best choice of high temperature internal external power lamp will affect the service life of power supply if the radiator circumstances to choose the external power supply or power supply installed away from LED in the design of the above

C.The working temperature selection to have a certain margin. General switching power supply rated working temperature of -10 – 55 degrees, refers to the work does not represent the limit temperature in long time working in this temperature range. If the internal temperature of lamps 55 degree case, switch power supply the highest working temperature should be 65 or 70 degrees.

D.In the use of Engineering problems. The LED lamp power is often much in the way of parallel switch used in the project, in the instant power circuit voltage drop a lot of, response time is short of power at low voltage and high current is forced to start, then impact current at very high easily damaged power, so in use to put a few road. Batch switch.

E. Waterproof requirements. Waterproof requirements of luminaires selection of power supply. When the lamp is watertight and power supply is installed in the lamp. The power does not need to repeat the rising cost of bad waterproof waterproof heat.

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