FET constant current sources use JFETs and MOSFETs to deliver a load current, which remains constant despite changes in load ...

This dummy-load circuit has been in use at Maxim for more than 10 years (see the figure). It's useful for testing power supplies ...

Testing power supplies and batteries requires current loads capable of sinking large current and dissipating substantial amounts ...

Many devices today operate at higher voltages, such as silicon-carbide semiconductors, dc distribution systems, electric vehicle ...