Parsing the LED lighting drive power supply

Currently in the general LED lighting market , there is a non-isolated LED driver design and isolated power points. Non-isolated design is limited to the double insulation products , alternative products such as light bulbs , which are integrated LED and the product in a non- conductive plastic and sealed , so the end user does not have any risk of electric shock . Secondary products are isolated , the price is relatively expensive , but the user can access to the LED and output wiring place ( usually in the case of LED lighting and street lighting applications ) , this product is essential.
With isolation transformer or electrical isolation of the led outdoor lighting wholesale means without direct hand contact with an electric shock . Without isolation transformer LED drive power , though still possible to achieve some mechanical means of insulated protective shell , but this time the LED does not directly contact with at work.


Insulated bulbs will become mainstream in the future
Physical design determines the drive is isolated or non -isolated . Safety rules typically require the use of two separate isolation layer . Designers can choose between two physical barrier , ie plastic diffusers and glass shields, and use non-isolated power . If the cost is too high physical isolation , the presence of mechanical difficulties or absorb too much light , we must solve the problem in the power supply electrical isolation .
Isolated power supply is usually the same power levels than non-isolated power larger. Lighting designer must be a lot of cost and design optimization in the design of each of their products . Because for different applications, is the use of isolation transformer insulation or the use of protective isolation shell lampshade designer in a different point of view will always be different opinions.
Often, they will go analyze various aspects , such as cost and manufacturing processes, efficiency and volume , insulation reliability and safety code requirements , and so on . Transformer with a higher driving costs , but also make the corresponding LED lamps become more practical , able to meet the needs of end users accidentally touching the LED. When incandescent glass enclosure can easily be damaged, an ordinary light bulb E27 models can be replaced to become LED lights.
In addition, in the industrial area , or office equipment applications lamps do not need to come into contact with end-users, such as street lights and shopping malls lighting , when the LED lights do need isolation transformer.
As an end- user to allow safe use of the product , we will certainly consider the reliability of the insulation and isolation . Some designers using isolation transformer design , so they can simplify the design of cooling and shade . If driven design non-isolated , lamp shells and other structures on must be considered reliable insulation requirements. Therefore, as a power -driven, isolated and non-isolated solutions always exist.
The main challenge of domestic LED driver power supply manufacturers may face is to find a low-cost AC / DC drives, to meet the more stringent achieve power factor and efficiency of the power system performance at low cost . In the future , the use of high-quality, high-reliability power in space-constrained and there are difficulties in cooling systems ( such as LED lamps ) will no longer be free . However , many end-users in a section of the lamp life of 10,000 hours before , in order to prove its high quality is fairly difficult.

Based on the transformer -isolated LED driver power will be the mainstream
Isolated and non-isolated LED driver power supply options have their advantages and disadvantages. The industry believes that , ClassII will be the mainstream , because it simplifies the LED heat. ClassI II system relies grounding system or , in most cases , closely related with the installation location . ClassII more common , it requires a two-stage or reinforced isolation , that requires a magnetic transformer windings , insulation tape , and physical isolation. ClassI system requires a grounded enclosure and ( or ) mechanical barriers , and then ClassII system unnecessary .
Currently there are several trends are driving the development of LED lighting market . The first is improving the efficiency of high-brightness LED and high reliability, very high efficiency constant current led outdoor lighting wholesale continue to emerge , followed by global legislation to ban incandescent lighting ( due to its low efficiency ) and the phasing out of the CFL energy saving lamps ( if broken then it will be out of environmentally harmful mercury ) . These factors combine to make LED lighting becomes a positive long-term trends. Of course , low system costs ( including LED, thermal management systems and LED drivers ) will always be the driving force consumers widely used LED general lighting.
In fact , in many of the LED lighting product , failure is a common phenomenon , because most of the power failure , rather than failure of the LED. On the design level , which means that OEM system thermal design must become an expert . LED with high efficiency, but they also produce more heat than incandescent or conduction energy-saving lamps .
Since many LED lighting applications enclosed in a small space , it is difficult to heat ventilation approach. Without careful thermal design , LED and power driver circuit is very easy because the high temperature degradation or permanent failure.

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