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Forum Power Supply help

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Power Supply help

richkid over 12 years ago

hey guys i'm a noob and currently trying to build a power supply that converts 110v- 24v DC-6A. can i get some some assistance like with a material list and a schematic diagram ?

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billabott over 12 years ago +1 verified

This circuit here is what I believe you are after.
Former Member over 12 years ago +1

Here are the some tutorials for AC to DC powe supply with constant and variable DC supply. http://www.youtube.com/watch?v=BZmn_HKPx7Y http://www.youtube.com/watch?v=2EFnqZUxFZ4
richkid over 12 years ago in reply to billabott +1

Thanks alot , thats what i was looking for (^_^)

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0 billabott over 12 years ago

This circuit here is what I believe you are after.
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0 ChuckMcM over 12 years ago in reply to billabott

Just sort of FYI, that particular circuit the LM338K is a) only good to a maximum of 5A (original question is for 6A), and b) when the regulator is in linear mode its good for about 2A at 24V. That said, if you're willing to build a load bypass circuit you can make a 10A powersupply with this unit see the datasheet http://datasheet.octopart.com/LM338K-STMicroelectronics-datasheet-5316166.pdf for a typical example. In all cases building a 150W linear supply will be roughly 66 - 75% efficient so you're going to be throwing off anywhere from 40 to 50W of excess heat.

Consider building a switching supply or buying a pre-made one.
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0 ChuckMcM over 12 years ago in reply to billabott

Just sort of FYI, that particular circuit the LM338K is a) only good to a maximum of 5A (original question is for 6A), and b) when the regulator is in linear mode its good for about 2A at 24V. That said, if you're willing to build a load bypass circuit you can make a 10A powersupply with this unit see the datasheet http://datasheet.octopart.com/LM338K-STMicroelectronics-datasheet-5316166.pdf for a typical example. In all cases building a 150W linear supply will be roughly 66 - 75% efficient so you're going to be throwing off anywhere from 40 to 50W of excess heat.

Consider building a switching supply or buying a pre-made one.
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