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Old 10th February 2012, 05:25 PM   #1
max7219 is offline max7219  Germany
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Question Power for LM3886 withou transformator

Hi,
I am only a small step away from assembling my LM3886 and want to use a small power solution without a transformer.

Does anyone have a design for an SMPS or something else?

Can I expect any issues when not using a toroid transformer?

Any hints are welcome
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Old 10th February 2012, 06:42 PM   #2
! is offline !  United States
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Based on the question, buying a ready made power supply or two might be a better option. Usually those who make good, small, low noise SMPS for audio use, have already enough experience making them for low power non-audio uses that they would already know the issues and have a design in mind.
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Old 10th February 2012, 07:15 PM   #3
max7219 is offline max7219  Germany
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I wanted more go for diy.

Last edited by max7219; 10th February 2012 at 07:23 PM.
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Old 11th February 2012, 06:29 PM   #4
gootee is offline gootee  United States
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There are lots of SMPS designs available. Go to linear.com and national.com. They both have automated design software that can design almost whatever you want, and also have lots of application notes with ready-made designs and schematics.

What will power the SMPS? Another name for them is "DC-to-DC Converter".
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Old 11th February 2012, 09:23 PM   #5
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In any case go with a proven design, with a PCB layout and all. I'm not sure I'd want to DIY a SMPS though - troubleshooting something that has 380 V= in it, connected to mains no less, does seem rather intimidating. (Which it should, at least to anyone with a bit of an idea of electrical safety.)
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