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CC response of a lab PSU that I’m working on; It’s a dirty test that you can perform on your PSU too. with maximum voltage and minimum current, connect an LED to the output and see if the LED survives the test! 2
CC response of a lab PSU that I’m working on; It’s a dirty test that you can perform on your PSU too. with maximum voltage and minimum current, connect an LED to the output and see if the LED survives the test!
CC response of a lab PSU that I’m working on; It’s a dirty test that you can perform on your PSU too. with maximum voltage and minimum current, connect an LED to the output and see if the LED survives the test! from electronics
That’s actually a bit hazardous. If the CC function is not working, that LED could explode in your fingers and cause some damage.
That’s a completely stupid test because you aren’t really testing the CC response of your supply but whether or not the output capacitors (which typically are **after** the current limiter) store enough charge to blow the LED right away or only after a few tries.
Coincidentally, this is also the reason why it is not recommended to test LEDs using the CC mode on the supply – that capacitor could have enough charge to blow the LED, especially at higher voltages. All that before the current limiter has any chance to step in.
In short, don’t do this. Use a resistor and a scope to measure the voltage drop across it (= current) instead.