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Overunity Machines Forum



5amp negative adjustable voltage regulator needed

Started by mostrander, August 03, 2008, 11:38:37 AM

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mostrander

August 03, 2008, 11:38:37 AM
Hey guys I need some help finding a part for a power supply I?m building. The part is a 5amp negative adjustable voltage regulator -1.2v to -32v. I have found a 3 amp part# lm333 but I need a 5 amp, any suggestions?

insane4evr

#1
August 03, 2008, 12:30:45 PM
You can connect several of them in parallel. Look at the datasheet from National Semiconductor (page 5).
Since this regulator is the linear family, you will need massive heatsink at high output current and high input-output differential voltage.

khabe

#2
August 03, 2008, 02:20:07 PM
Quote from: insane4evr on August 03, 2008, 12:30:45 PM
You can connect several of them in parallel. Look at the datasheet from National Semiconductor (page 5).
Since this regulator is the linear family, you will need massive heatsink at high output current and high input-output differential voltage.
Same opinion from my side,
I use parallel switch mode regulators often enough,
khabe

gyulasun

#3
August 03, 2008, 06:26:20 PM
Quote from: mostrander on August 03, 2008, 11:38:37 AM
Hey guys I need some help finding a part for a power supply I?m building. The part is a 5amp negative adjustable voltage regulator -1.2v to -32v. I have found a 3 amp part# lm333 but I need a 5 amp, any suggestions?

Hi,

The LM333 data sheet includes three LM333 devices in parallel to get 9A output current from -1.2V to -27V....   Is it not  enough good for you?

http://www.national.com/ds/LM/LM333.pdf

mostrander

#4
August 03, 2008, 06:47:03 PM
Thanks guys that should work.
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