I have built a 30v/2a/60w e-load and I have done some testing, with a single 30/3a CC PSU. Here's that thread:
https://www.eevblog.com/forum/projects/electronic-load-project-ltv171-irfp250-with-kicad-files/I need more wattage, for testing, so I posted a thread on paralleling my two PSUs (Schottky diodes on order.) But, even the two supplies may not have sufficient wattage, for the Single-MOSFET test rig and certainly not for the Two-MOSFET 30v/4a/120w final design.
I asked my brother for suggestions and he had what I think to be a simple, inspired idea... Just use an automobile battery.
We discussed the safety concerns that we could think of...
- The DUT input is already fused.
- Add a diode, to prevent back-flow, to the battery, should things get weird.
- Be v-e-r-y careful, when advancing the load and monitor everything carefully.
But, more advice might keep me out of some unforeseen trouble. So, is there anything else that I should consider?
I am aware of car battery safety protocols and the avoidance of explosions...
Thanks, for your help.