OK, I tore apart the passthru. The USB wires go to a very small circuit board which has a surface-mounted tactile switch on it.
On the USB side of the switch, there is what appears to be a tiny IC. On the other side there is a tiny, tiny resistor.
They are WAY too small to be doing any kind of voltage or current limiting.
I'll charge up my camera & post a pic, if anyone is interested.
On the USB side of the switch, there is what appears to be a tiny IC. On the other side there is a tiny, tiny resistor.
They are WAY too small to be doing any kind of voltage or current limiting.
I'll charge up my camera & post a pic, if anyone is interested.