Timeline for How does a constant current (CC) power supply regulate voltage (V) in parallel circuits?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 13, 2014 at 18:17 | vote | accept | Phil | ||
| Dec 13, 2014 at 18:16 | vote | accept | Phil | ||
| Dec 13, 2014 at 18:17 | |||||
| Dec 13, 2014 at 17:35 | answer | added | EM Fields | timeline score: 2 | |
| Dec 13, 2014 at 15:55 | comment | added | Alfred Centauri | Phil, what does "voltage at each end" mean? There is just one voltage, not two. Regardless, if the two diodes are indeed connected in parallel across the power supply terminals, and if one diode has a significantly lower operating voltage rating, almost all of the power supply current (2.7A) will be through that diode. Thus, the voltage across will essentially be entirely determined by that diode. To find that voltage, consult the IV curve for that diode (assuming that much current has not destroyed the diode). | |
| Dec 13, 2014 at 15:37 | history | edited | Phil | CC BY-SA 3.0 |
added 70 characters in body
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| Dec 13, 2014 at 15:27 | comment | added | Phil | That's exactly the whole point dear @AlfredCentauri. I'm wondering what would be the voltage at each end? If there is single LED attach, the V gets to somewhere between MIN and MAX of the diode. What if on the parallel there is another LED with different MIN, MAX and TYP. values? | |
| Dec 13, 2014 at 14:56 | comment | added | Alfred Centauri | Since, I assume, we're talking about a single power supply, it's not possible for there to be two different voltages; there is just one voltage across the two terminals of the power supply. Also, if the two diodes form a "simple parallel circuit", surely you know that there cannot be a different voltage across each? | |
| Dec 13, 2014 at 14:46 | comment | added | Phil | Yes. That's the whole question. Current is regulated, voltage is varying. So how would it deliver the voltage to each node? I will take your advice onboard and try better next time, thanks. It is a simple parallel circuit though as you can see and read I hope. | |
| Dec 13, 2014 at 14:44 | comment | added | Alfred Centauri | Phil, if the supply is in fact a constant current supply, it is the current that is regulated (made regular), not the voltage. Also, by definition, two parallel connected circuit elements (diodes in this case) have identical voltage across. As written, your question is ambiguous. I recommend using the schematic editor to produce a circuit diagram of what you're proposing. | |
| Dec 13, 2014 at 13:58 | answer | added | Majenko | timeline score: 2 | |
| Dec 13, 2014 at 13:51 | review | Close votes | |||
| Dec 14, 2014 at 8:40 | |||||
| Dec 13, 2014 at 13:38 | answer | added | Michael Karas | timeline score: 0 | |
| Dec 13, 2014 at 13:26 | history | asked | Phil | CC BY-SA 3.0 |