Full Member level 3
I have a project (GPS for vehicle) where I am designing the input protection for the power supply (which is based on a L5970D). I am using a series diode against reverse polarity, and a TVS diode against transients. But, I am confused about whether I should be using a unidirectional or bidirectional TVS. I suppose, that because the other diode against reverse polarity is already there then I only need a unidirectional TVS. Is this correct?