Flyback Diode. To protect the switch from being damaged due voltage spikes or inductive flyback a flyback diode or a freewheeling diode is used. The above image shows the same inductor circuit but with additionally a flyback diode.
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To protect the switch from being damaged due voltage spikes or inductive flyback a flyback diode or a freewheeling diode is used. A flyback diode is a diode placed in parallel with a coil in switching circuits. Switch contacts and semiconductor junctions can easily handle these lower voltages.
The above image shows the same inductor circuit but with additionally a flyback diode.
If the voltage across a flyback diode is negative circuit current is flowing and switch is closed no current can flow from the diode it is off or reverse biased. A flyback diode is also called as freewheeling diode. The above image shows the same inductor circuit but with additionally a flyback diode. It is used in circuits in which inductive loads are controlled by switches and in switching power supplies and inverters.
