| Home | Terms of Use | Site Map | Contact Us |
IndustryCommunity.com > Electrical and Electronic Community > Analog Circuit Design Forum > Message
Main Menu
Find

[ List Subjects ][ Main Page ]
[ View Followups ][ Post Followup ]

Subject: Re: foldback current-limiting

Date: 12/02/01 at 6:15 PM
Posted by: Brian Snell
E-mail: bsnell@lara.on.ca
Message Posted:

In Reply to: foldback current-limiting posted by Francis LHeureux on 11/06/01 at 2:46 PM:

Greetings.
I think that an LM317 voltage regulator, configured as a constant-current source set for 1A may serve your purposes. The chip is good for 1.6A (with heatsink) and the constant-current mode will limit the current to the set limit. Standby operation would be set by holding the normally "Adj" terminal at "-ve" which would pull the output line down to 1.2 volts. Opening the "adj" link allows the chip to track normal constant-current operation with output voltage being input less the regulator drop. If the residual 1.2v is bothersome during "standby" add 2 silicon diodes in series with the regulator output before feeding the load.
Hope that this helps.

Brian Snell.


Follow Ups:


Post a Follow-up:

Name:
E-Mail:
Subject:

Message to Post:

 

1999-2001 Sunlit Technology Co., Ltd. All rights reserved.