Electronic Balast

In principle, fluorescent lamp controller (often referred to as electronic ballast) is comprised of components that provide high currents with frequencies above 18KHz. Commonly used frequency is 20kHz frequency up to 60KHz.
This application has several advantages, namely:
a. Increase the conversion ratio of electric power to the light produced.
b. No detection of blink of the eye because kedipannya occur at very high frequencies which can not be followed by the speed of the eye.
c. Lightweight electronic ballasts.

But the benefits are redeemed with circuit complexity compared with conventional ballasts. In the electronic ballast, there are 3 different types of commonly used are:
a. Flyback inverter
b. Resonant Current source circuit
c. Voltage source series resonant