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14th December 2011, 09:37 PM
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diyAudio Member
Join Date: May 2011
Location: Santa Lucija
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7809 with bypass transistor and current limit
I am designing this power supply with the specs: 9V, 3A and current limit kicks in at 2.7Amps. Schematic is attached. I managed to get quite sharp at the output voltage and current limiting but I cannot adjust the current that passes through the regulator. When current limit kicks in, the current through the regulator just stays at 0.85Amps. How can I set is to 0.5Amps at all times? Can you suggest maybe better configurations of the transistors?
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