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Non-linear CV/CC control in schematic
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xavier60:
You would be able to tell how close operation is to the current limit threshold by moving the Pot.
Silver_Pharaoh:

--- Quote from: xavier60 on March 05, 2019, 01:59:54 am ---You would be able to tell how close operation is to the current limit threshold by moving the Pot.

--- End quote ---

Not sure what you mean by this?


Voltage drop is very low across the 10 \$\Omega\$ resistor.

I had to change the current limit pot value back to 10K. I forget why I changed it but it didn't let me reduce the current below 10A. I must have been tinkering with it and forgot to change it back.
xavier60:
The idea is to figure out wether the CL transistor inside of the LM723 is starting to conduct or not.
The simplest way is to apply a load that just starts to make the output voltage drop then make a small adjustment to the current limit Pot to see if it affects the output voltage.
Measuring the voltage between pins 2 and 3 would be useful.
Silver_Pharaoh:

--- Quote from: xavier60 on March 06, 2019, 01:01:54 am ---The idea is to figure out wether the CL transistor inside of the LM723 is starting to conduct or not.
The simplest way is to apply a load that just starts to make the output voltage drop then make a small adjustment to the current limit Pot to see if it affects the output voltage.
Measuring the voltage between pins 2 and 3 would be useful.

--- End quote ---

Ahh I see.

Can't tinker much tonight, but I think you are correct in saying the CL transistor is starting to conduct.
It's hard to tell because I don't have fine control with the current adjust and the voltage drops near full load, so the current adjust pot is already maxed out..


I reduced the balancing resistors to 0.8 \$\Omega\$ each and the voltage shot back up to 5.1V like I have it set. This pulling 12A at the output.
Are the balancing resistors limiting max output current too much?
diane:
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