The choice of driving for LED lighting design

The working circuit of LED drive the basic schematic as shown below, the so-called "isolation" that the AC line voltage and LED (i.e. input and output) without physical electrical connection, the most common is the use of transformer to electrical isolation and non isolation "are not applied to electrical isolation transformer. It is worth mentioning that, in the LED lighting design, AC-DC power conversion and constant current drive these two parts of the circuit can be used in different configurations.

The arrangement of LED and the specification of LED light source determine the basic drive requirements. The main function of the LED driver is to limit the current flowing through the LED under certain operating conditions, regardless of the input and output voltages.

The working circuit of LED drive the basic schematic as shown below, the so-called "isolation" that the AC line voltage and LED (i.e. input and output) without physical electrical connection, the most common is the use of transformer to electrical isolation and non isolation "are not applied to electrical isolation transformer.

It is worth mentioning that, in the LED lighting design, AC-DC power conversion and constant current drive these two parts of the circuit can be used in different configurations:

(1) the overall (integral) configuration, that is, the two are integrated together, are located in the lighting fixture, the advantages of this configuration, including the optimization of energy efficiency and simplify the installation, etc.;

(2) distributed (distributed) configuration, that is, the two exist alone, this configuration simplifies security considerations, and increase flexibility.