Hi there,
I am looking at a switchmode power design and noticed this double inductor which appears to be between the in plug and the rest of the circuit... I have taken a picture of it in the circuit and also another very similar but bigger one on the bench. These are ringed in black and the board input is in red. If you look closely at the circuit board you can see the (+) and (-) tracks under the board and the inductors are part of these circuit tracks.. (the IC is a TL494).
View attachment 61676
The bigger one on the bench has an inductance of 22mH.
I was hoping someone might shed some light on why this is in the circuit and also what its purpose is??
Would it be in the AC or DC part of the circuit?
I have a number of these wrecked from circuits I had from a recycle yard and wondered if its a good idea to include one of these in a switchmode bench power supply I am building?
Hope someone might answer these questions.
Kind Regards
Simon
I am looking at a switchmode power design and noticed this double inductor which appears to be between the in plug and the rest of the circuit... I have taken a picture of it in the circuit and also another very similar but bigger one on the bench. These are ringed in black and the board input is in red. If you look closely at the circuit board you can see the (+) and (-) tracks under the board and the inductors are part of these circuit tracks.. (the IC is a TL494).
View attachment 61676
The bigger one on the bench has an inductance of 22mH.
I was hoping someone might shed some light on why this is in the circuit and also what its purpose is??
Would it be in the AC or DC part of the circuit?
I have a number of these wrecked from circuits I had from a recycle yard and wondered if its a good idea to include one of these in a switchmode bench power supply I am building?
Hope someone might answer these questions.
Kind Regards
Simon