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Advantages of Fly-back converter | disadvantages of Fly-back converter

This page covers advantages and disadvantages of Fly-back DC-DC converter, its Circuit and working operation. It mentions benefits or advantages of Fly-back converter and drawbacks or disadvantages of Fly-back converter.

What is Fly-back DC-DC converter?

About DC to DC converter:
A dc-dc converter is electronic circuit. The main function of this circuit is to modify one potential difference(i.e. voltage) level to the another potential difference level. It is basically a voltage regulator consisting of switches, inductor and capacitor for power conversion. There are numerous applications of DC-DC converter.

DC-DC converters are divided into following types based on isolation between input and output circuits. • Isolated DC-DC converter and Non-isolated DC-DC converter
Isolated DC-DC converters are further divided into following sub types.
• Fly-back • Forward • Half bridge • Full bridge • Push Pull

Fly-back converter circuit

About Fly-back converter circuit working operation:
The figure depicts flyback converter circuit. Fly back is a buck boost chopper with isolated division to configure a transformer. With the additional advantage of isolation, the voltage ratio is multiplied. It is used in both alternating to direct and direct to direct transfer with galvanic separation between input and output.

The flyback circuit is as shown in the figure. It can present single or multiple isolated output voltages and will activate above extensive scope of input voltage deviation. With regard to efficiency and energy, fly-back power supplies are sub-standard than several switched mode power supply circuits but it is the easiest technique. Due to its less rate makes it accepted in small output power range. Efficiency is typically 75% to 80% and Power rating are from 1 Watt to 50 Watts.

Benefits or advantages of Fly-back converter

Following are the benefits or advantages of Fly-back converter:
➨The main gain is the output filter inductors vital for all forward topologies which is not obligatory for fly back. This is because of the transformer in the fly back acts as an inductor and not as a transformer.
➨In many situations an LC filter is added to the load side of the fly back regulator for condensing output voltage ripples.
➨Voltage rating on secondary components is low.

Drawbacks or disadvantages of Fly-back converter

Following are the drawbacks or disadvantages of Fly-back converter:
➨More EMI since of the gap.
➨More ripple current.
➨More output and input capacitance.
➨Higher losses.
➨Right half pole in compensation loop.

Conclusion: In order to understand advantages of Fly-back converter and disadvantages of Fly-back converter one has to understand Fly-back converter basics.



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