Generally, the power supply of LED fluorescent lamp is divided into two types: built-in power supply and external power supply.

Built-in means that the power supply can be placed inside the lamp tube. The greatest advantage of this built-in fluorescent lamp is that it can be directly replaced by the existing fluorescent lamp tube without any modification.

So the built-in shapes are made into long strips to fit into the semi-circular lamp tube.

Analysis of Non-barrier and Barrier Types

Non-blocking constant-current power supply - non-blocking means that there is a direct connection between the load end and the input end, so touching the load is dangerous of electric shock. Nowadays, the most widely used direct buck power supply with right and wrong barrier is used.

That is to say, the AC rectifier will get the DC high voltage in the future, and then directly use the buck circuit to control the buck and constant current. The advantage of non-blocking constant current source is its simplicity and high index. Its output current can be determined by the number of LED series-parallel connection. However, in most cases, its output current can not be too large, and the output voltage can not be too high.

Barrier type constant current power supply - Barrier type refers to the barrier transformer at the input and output terminals, which may be power frequency or high frequency. But both can block the input and output.

The advantage of built-in power supply is that it can directly replace the existing fluorescent lamp with inductance ballast without removing anything.

In order to get the highest function, centralized external power supply is the best choice. The places to promote the power supply of LED fluorescent lamps are government organs, offices, shopping malls, schools, underground parking garages, subway and other places.

The centralized mode refers to the selection of a high-power AC/DC switching power supply, uniform power supply, and each fluorescent lamp uses a unique DC/DC constant current module. In this way, the highest efficiency and power factor can be obtained.