Hello,
I am trying to implement the attached 5A constant current/voltage regulator for a project. The circuit was found in National's LM317 data sheet, but am a bit confused about it, and was wondering if anyone could help me understand what the circuit is doing.
Mainly two things:
I am trying to implement the attached 5A constant current/voltage regulator for a project. The circuit was found in National's LM317 data sheet, but am a bit confused about it, and was wondering if anyone could help me understand what the circuit is doing.
Mainly two things:
- What voltage should be attached to the V+ rail of the op-amp (pin 7)? I've seen people online say both +6v or Vin, but +6v seems to limit the output voltage of the circuit, and Vin doesn't light the LED (which i'm assuming indicates it's not active?)
- What is the purpose of the LED? I'm assuming it's meant to indicate that current is being regulated (kept constant), could someone confirm this?
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