What are the isolation and non isolation situations of the driving power supply
At present, in the general LED lighting market, there are two types of driving power supplies: non isolated design and isolated type. The non isolated design is limited to double insulated products, such as substitute products for light bulbs, where the LED and the entire product are integrated and sealed in non-conductive plastic, so there is no risk of electric shock to the end user. Secondary products are all isolated and relatively expensive, but they are essential in places where users can access LED and output wiring (usually in LED lighting and street lighting applications).
The LED driver power supply with isolation transformer or electrical isolation means that the LED can be directly touched by hand without electric shock. Although the LED driving power supply without isolation transformer can still achieve partial mechanical insulation with the help of a protective shell, the LED cannot be directly contacted during operation.
Insulated light bulbs will become mainstream in the future
The physical design determines whether the drive is isolated or non isolated. Security rules typically require the use of two independent isolation layers. Designers can choose two types of physical isolation layers, namely plastic diffuser and glass cover, and use non isolated power supply. If the physical isolation cost is too high, there are mechanical difficulties, or too much light is absorbed, the electrical isolation problem must be solved in the power supply.
Isolated power supplies are usually larger than non isolated power supplies of the same power level. Lighting designers must conduct extensive cost and design optimization work in every product they design. Due to their suitability for different applications, designers will always have different opinions on whether to use isolated insulated transformers or isolated protective lampshades.
Usually, they will analyze from multiple aspects, such as cost and manufacturing process, efficiency and volume, insulation reliability and safety regulations requirements, and so on. The drive cost with a transformer is relatively high, but it also makes LED lamps more practical and can meet the needs of end users who accidentally come into contact with LEDs. When the glass casing of an incandescent lamp is easily damaged, an E27 model ordinary bulb can be replaced with an LED lamp.
