Power for LM3886 withou transformator

max7219 · 10th February 2012, 05:25 PM

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

! · 10th February 2012, 06:42 PM

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.

max7219 · 07:23 PM

I wanted more go for diy.

gootee · 11th February 2012, 06:29 PM

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".

sgrossklass · 11th February 2012, 09:23 PM

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.)

10th February 2012, 05:25 PM	#1
max7219 diyAudio Member Join Date: Nov 2009 Location: Hamburg	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

10th February 2012, 07:15 PM	#3
max7219 diyAudio Member Join Date: Nov 2009 Location: Hamburg	I wanted more go for diy. Last edited by max7219; 10th February 2012 at 07:23 PM.

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10th February 2012, 06:42 PM	#2
! diyAudio Member Join Date: Jun 2005 Location: Midwest	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.

11th February 2012, 06:29 PM	#4
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	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".

11th February 2012, 09:23 PM	#5
sgrossklass diyAudio Member Join Date: Nov 2004 Location: Germany	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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