Project I am working on. I'm not a board designer. Box integration is more my thing. This circuit is needed for providing a 13VDC output. Input power is 28VDC. When 28VDC is applied the power supply voltmeter drops to 6VDC, and it goes into current limiting mode. Current output is maxed out at 5 amps. D5 starts to look like a well done hotdog on the grill and begins to smoke. There were other parts of this circuit in the original design that are not being utilized, but as I said I'm not a board guy. I think with the removal of the unnecessary portion, the current is too high, thus R15's value is too low now. Figured maybe one of you on the forum might have the answer. So how this works is the tester utilizes 28VDC to test a battery pack. All of the other functions work properly when removing this part of the circuit from the equation. There is a test for a particular circuit in the battery that requires 13VDC to verify proper operation, so I can't ditch this portion of the tester. Maybe there is a better way to do this?
