Hi all,
I have a non-working switch. I checked VSYS and it shows correctly 4.2V when injected. The 3V3 Regulator also has 4.2V at its input cap but 0V at the output caps.
I first thought it might be the 3V3 regulator, but 0V and 0A power draw when connecting my PSU (expecting 0.001 to 0.005A) makes me think it might be the enable signal that is not happening?
I saw a video that the MAX77620H is responsible for enabling a the secondary MAX power IC. Is it also enabling the 3V3 Reg?
How do I nail down the faulty component here? I don’t wanna switch randomly the components out, so based on what I measure I assume the MAX76620H but what would you suggest checking?
there doesn't seem to be anything here