simple adjustable voltage regulator?

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AKHeathen

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Joined 2011
#1
anyone have a schematic floating around to build a simple adjustable voltage regulator? what i ahve to work with is about 18vdc, and i want to be able to adjust it between 10.5 and 16. right now, i'm implementing a 16v shunt, but i would rather step away from shunt, and adjust. btw, i need to handle 10a, though i may build another at much higher amperage. just don't have time to research it right now.
 
#4
Currents of 10A and higher is never simple! check the ESP site for the battery charger project. A few resistors will need to be changed on the V adj circuit. Read it and I could answer any Q.note> I'm guessing 16 V out maybe an issue with only 18V DC input depending on exact transformer used resulting from output current and ripple voltage. ie If you can use higher Vin-Vout this relatively simple circuit will be fine.
 
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#5
sorry to bother with something so simple..... i just hop on the plane to work wed. i was just looking to put together something tried and true. that esp charger project took a bit to find, but i got it. i'm going to order the parts, and build it when i get back home, but for now, i'm going to try and put together an lm350, or 317based setup and try to sinc 4, or 6 of them to get me buy on crappy nte parts(local option) thanks for the flogging and help.
 
#6
If you look at the data sheets and application notes for the various adjustable regulators, many show circuit for higher currents. The essense of it is using the LM317 with a large pass transistor added to carry the current. The 317 controls the transistor.
 
#7
i may just do that... time is running short before i get to work, so i may introduce an array of 4, or more power transistiors, using a single 317 as a driver. have 3 weeks to get it sorted, now....plenty of time for some research/design...thanks.
 
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