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Subject: Re: foldback current-limiting

Date: 12/02/01 at 6:40 PM
Posted by: Brian Snell
E-mail: bsnell@lara.on.ca
Message Posted:

In Reply to: Re: foldback current-limiting posted by Brian Snell on 12/02/01 at 6:15 PM:

Oops. Pushed the "submit" button before checking. Ignore the last bit about diodes. In "constant current" mode @ 1A there will be a 1.2 ohm resistor linking "Out" to "Adj". The 1.2 volts present at the normal "out" terminal is, of course, of no consequence in "constant current" mode since the output is taken from the "Adj" terminal. Pulling "adj" low to get into "Standby" is the same thing as a short in the load circuit ----the LM317 will sit there pulling 1A max without a problem --with no feed to the load. Heat sinking is mandatory.


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