LED driver circuits:
As we know that LED (Light Emitting Diode) needs DC current for its operation. This circuit is responsible to convert AC current to DC current. LED driver circuit operation is generally different from conventional rectifier circuits.
A conventional rectifier circuit step – down the input AC current by using a transformer and after that diodes are used to convert this input into unidirectional or direct current (DC current). But this LED driver makes changes in the frequency of input AC current (220v 50 Hz). They boost the frequency from 50 Hz to several GHz ranges and after that, it uses several voltage regulators to provide sufficient power to the LEDs.
Circuit power handling capacity is depending on its different electronics components. It mainly contains a few capacitors, resistors, and high-frequency ferrite transformers (approx. 60 GHz). The main benefit of using a ferrite transformer is that it has low hysteresis losses (so it increase the efficiency of the transformer). For example, you can see the image of a LED driver circuit.