Could anyone here help me? I am a bit of newbie to touch electronics. The circuit which is based on LM2596 is given below,please have a see.
This is a circuit change voltage from 12V to 4V. The P-MOS is the MOFSET of AO340.
I don’t know why it’s useless.
I have measured it. The source electrode–12.26V, grid electrode–11.89V,drain electrode–0.145V.
Was MOS broken? Or LM2596? Is it suitable here? Please help me,thanks!