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Subject: high current voltage regulator

Date: 11/12/00 at 3:42 PM
Posted by: Scott
E-mail: deucem35@excite.com
Message Posted:

I am working on a high current voltage regulator circuit and I have hit a snag. The circuit is a lm317 driving a pair of bridged 2n3055 trans. No problem so far except I am unable to devise a way to add current limiting without a slew of new parts and a lot more cost. The problem lies in that the supply input is 28.5vdc max. 24vdc min., output will be in the range of 12.8vdc to 14.5vdc. Load consists of a varying number of 12v automotive bulbs. This means a real high startup load until the filaments have heated up. To complicate matters, the current will be shut off up stream of the regulator while it is still loaded.
Got any ideas? e-mail me.
BTW I have a working cad model of the circuit and can supply a graphic of it.
Thanks in advance!

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