Sony Camera Multi Port Connector - Load Test

This is a quick outline of some resistive loading I did for three Sony cameras. The Sony Multi Port connector has 3.15v available on pin 10, but I've been unable to find any data on the actual dc/dc converter chip that is used to drive this pin. The other complicating factor is that the chip also drives other components that may or may not be connected to the camera at the time.

This test was undertaken with full batteries and with no other components connected to the camera eg, flash units, microphones, etc. Lenses were connected to a couple of the bodies, but i'd suggest these made no significant difference to the results.

Loading was done between pin 10 (3.15v) and pin 2 (gnd) on three different Sony cameras - the a6000, a6400 and the A7iii. I have no idea how long the cameras could sustain these loadings or if these loadings have damaged the cameras in any way.

I undertook this test to identify if my cameras could handle some low mA loading by a circuit i'm developing. As it turns out, the voltage drop i'm likely to experience for my circuit is <1%, so i'm pretty happy with that.

Here are the tabulated results for the voltage drops when a particular resistor was loading pin 10 (3.15v) to pin 2 (gnd).

Here are the graphed results for the voltage drops when a particular resistor was loading pin 10 (3.15v) to pin 2 (gnd).

I've included a nominal mA loading to the graph. This loading line assumes a consistent 3.15v and the nominal resistor loading. So, take this value with a grain of salt - I didn't measure current flow while I was testing.