The 500mA sink limit

When in a constant voltage mode there is a 500mA current sink capability but what happens if it needs to sink more? is it safe to go over it as long as the voltage won’t rise over 5V?

Hi and welcome to the forum!

Yes, it is safe as long as you do not exceed 5V on any pin.
However, you can not trust the measurements above 4.2 if you are connected only via USB. You need to have a DC adapter plugged in to trust the measurement all the way up to 5V.

With automation toolbox, you can fully control this current sink and sink up to 2.5A.

Best regards,


Hi…In the event that you need 500mA from more than one yield, use TO-220 NPN darlingtons, and discrete resistors to give you 1mA of drive current at the base of the semiconductor. Practically any CMOS or TTL yield can drive 1mA. What’s more, the 500mA gatherer current is adequately little so you will not need heat sinks for the semiconductors.