diyAudio Forums Archive > Top > Other Stuff > Power Supply Design Using step-up regulators? - Click HERE for Original Thread AudioWizard Hi all, is it ever acceptable to use step-up regulators for hi-fi audio? My own answer until now would be no, but I'm wondering how I can design a power supply from a single-cell Li-ion battery (~3.6V), to get something like +/-12V (or 24V and I'd use a virtual ground circuit). Is there a solution for this? I mean a solution that would be acceptable in terms of performance for audio stages? Any ideas welcome. Thanks! luka Hi I think that pushpull would be great, but problem is, that you have only 3.6v, which is not enough for most/all? smps chips jackinnj There have been some very, very low voltage converter designs in EDN. Take a look at Design Note 280 on Linear Technology's website: http://www.linear.com/pc/downloadDo...042,C1031,D4476 luka Hi Yup only chips like that, pretty new compared to what normally is used...or uController theAnonymous1 I have used MAX629 (with rail splitter), and Texas Instruments PTN04050C/PTN04050A for +/-12v from a lithium cell. Whether either of those solutions could ever be considered "audiophile quality" is beyond my understanding of these things. jackinnj MAX629 looks interesting for a low voltage SMPS -- and the package is SO-8, has its own switching transistor. You would probably want to clean up the output with a low noise linear regulator -- but there is plenty of overhead to take care of the losses such a regulator would entail.

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