I am using this circuit (please don't go by the design it is just a circuit block, this is not the whole circuit). I have connected a 12V DC at the center of the transformer and this 12V is also connected to a 555 timer IC. Here I am triggering the transistors alternatively and the transistor completes the circuit of the transformer. Thus transformer generates a square wave at the output.
The circuit is working fine but there is one problem i.e my 555 IC gets blow off in minutes when I switched ON my circuit. I thought it might be due to the Inductor spike at 12V line (as the only 12V line is the common line for both transformer and 555) so I have attached an electrolyte capacitor at the input of the 12V supply and my problem solves out.
But this generates a confusion in my mind that how the inductor can change the 12V line to another voltage.
My Input supply source --- 12V from SMPS. Maybe if I have used the battery for input supply line then I will never get to know this problem. (As battery is self-act as capacitor)
Correct me if I am wrong in any of the concepts. Please give your thoughts it will be very helpful to me in analyzing the inductor more closely.