Isolated and non-isolated LED solutions

Isolated and non-isolated LED solutions each have their own characteristics and application scenarios in LED lighting technology.Here is a detailed analysis of both options:

1. Isolated LED solution

A. Definition and characteristics

Electrical isolation: The main feature of the isolated LED solution is electrical isolation between the input and output ends. This isolation can be achieved through transformers or other isolation components, thereby greatly reducing electrical noise interference caused by direct contact and damage to circuit components caused by adverse factors such as lightning strikes during the signal transmission process, improving the safety and reliability of the equipment.

Safety: Due to the existence of electrical isolation, the isolated LED solution has significant advantages in safety, which can effectively prevent the risk of electric shock and protect the safety of users and equipment.

B. Common circuit topologies

Common isolated LED circuit topologies include flyback power supplies, insulated switching power supplies, isolated switching power supplies, secondary side resonant converters, front-end receivers, hybrid power controllers, etc.
Each of these topologies has its own characteristics, but what they have in common is that they all achieve electrical isolation between input and output.

C. Application scenarios
Isolated LED solutions are usually used in situations with high safety requirements, such as high-voltage power supply LED products and industrial applications that require strict electrical isolation.

D. Application cases

2. Non-isolated LED solution

A. Definition and characteristics

No electrical isolation: Non-isolated LED solutions do not have electrical isolation between input and output. This solution usually has a simpler circuit structure and higher conversion efficiency, but when used, it is necessary to ensure that there is a certain isolation distance between the input end and the output end or to take other safety measures to ensure the safety of equipment and personnel.

Cost and efficiency: Due to the simple circuit structure, the non-isolated LED solution has certain advantages in cost. At the same time, its conversion efficiency is usually high, which is beneficial to energy saving and cost reduction.

B. Common circuit topologies

Common non-isolated LED circuit topologies include direct drive, series power supply, voltage divider power supply, etc. These topologies are relatively simple and suitable for applications with high cost and space requirements.

C. Application scenarios

Non-isolated LED solutions are usually used in situations with relatively low safety requirements and strict requirements on cost and space, such as small lamps such as LED fluorescent tubes.

D.Non-isolated

3. Comparative analysis

In summary, isolated and non-isolated LED solutions each have their own advantages and disadvantages, and should be selected according to specific needs and scenarios in practical applications. With the advancement of technology and reduction of costs, the two solutions are expected to be applied and developed in more fields in the future.

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