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    Analysis of isolated and non isolated power supply
    Release time:2014-02-13

    Insulated bulb will become mainstream in the future

    Determine the physical design of the drive is isolated or non isolated. Safety rules often require the use of two independent isolation layer. Designers can choose between two physical isolation layer, or plastic mask and glass shield, and use of non isolated power supply. If the high cost of physical isolation, mechanical difficulties or absorb too much light, it is necessary to solve the problems in the power supplyelectrical isolation.

    Isolated power supply is usually the same power level than non isolated power larger.Lighting designer must work a lot of cost and design optimization in each of the products they design in. As for different applications, the insulating transformerisolation or the use of protective casing isolation, designers consider will always have different opinions in different angles.

    Usually, they would go to the analysis from many aspects, such as cost and manufacturing process, efficiency and volume, insulation reliability and safetyrequirements, etc.. Higher cost with the driver transformer, but the corresponding LED lights to become more practical, to meet the needs of end users LED casual contact.When the incandescent lamp glass enclosure can easily be damaged, an ordinary lamp E27 model can be replaced with LED lights.

    In addition, in the industrial zone or lamps office equipment application does not need access to end users, such as street lamps and lighting in shopping malls, when the LED lights also do need isolation transformer.

    To end users as a safe product to use, will consider the reliability of insulation and isolation. As a complete product, the product surface users can contact the part mustgo through quarantine, can not let an electric shock. The entire system from the product, the isolation is inevitable, the difference is the provision of separate different locations. Some designers use isolation transformer design, so they can simplify the design heat and shade. If the use of non isolated driver design, the lights on the shell structure of the insulation requirements must be considered reliable. So as a power driven, isolated and non isolated solutions have been the same time.

    China LED drive power manufacturers may face major challenges is to find low-cost AC/DC driver, to meet the power factor and efficiency of performance is more strict in low cost power system. Future, in system space constrained and there are difficulties in cooling (such as the LED lamp power supply) used in high quality, high reliability,will no longer be free. However, before many end users to use a life in 10000 hours oflighting, to prove its high quality is very difficult.

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