Led fluorescent lamp power supply mode

    Led fluorescent lamp power supply generally divided into two kinds:built-in

and external.

    The built-in type refers to the power supply can be placed inside the tubes.

  The biggest advantage of this built-in is can be made directly replace the

exsisting fluorescent lamp tube,without the need for any change.

    So the shape of build in is made into strip to be filled into

semicircular tube.

    Analysis of non isolated and isolated .

    Non isolated constant current power supply, non isolation refers to the 

load end and the input end is connected directly,so the risk of electric shock

load is touch.At present, the most used is non isolated buck type power supply.

       

      Alternating current rectification after DC high voltage

then the direct use of buck circuit for Buck and constant current control.Advantages of non isolated

constant current source is simple, index is high, its output current can be a number according to LED 

series parallel decision. But in most cases, the output current for it cannot be too large, the output 

voltage can not be too high.The advantage of  built-in power is the ability to directly  replace the 

existing fluorescent lamp using the inductance ballast, without the need to remove anything.

     Centralized external power  in order to get the maximum performance .It's best to

use centralized external power supply. The promotion of LED fluorescent lamp power 

supply places are government agencies, offices, shopping malls, schools, underground 

parking, subway and other places.

   Centralized refers to the AC/DC switching powersupply,,the use of a large power unified power 

supply, and eachfluorescent lamp using the constant current moduleseparate DC/DC. 

You can get the bet efficiency.

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