[sdiy] Linear PSU options .. 7815/7915 vs 723 etc

[Loscha]

Bang for your buck, board space, heatsinking wise ... the 7xxx series is
pretty hard to beat.
In my EE degree, we explored lots of options, other ways of doing things,
and the 7xxx came out on top any way you slice it.

-loscha

On 1/9/06, Seb Francis <seb at burnit.co.uk> wrote:
>
> Hi,
>
> I'm almost getting to the stage where it's time to move my
> multi-compressor/gate/distortion project from the breadboard to PCB.
> The final piece to design is the PSU.
>
> The requirements are not too unusual .. +/-15V at probably 200mA max,
> and I want it to run from a standard AC wallwart (or maybe I'll stick a
> transformer in the box - I haven't decided yet).  My first thought is to
> use a 7815 & 7915, but I'm wondering is there some 'better' PSU design?
> What are some other options, and what actually are the advantages in
> going for a more complex PSU?
>
> I've seen plenty of power supplies based on the 723, but I don't need
> variable voltage or current limiting and it doesn't have to be exactly
> +/-15V - near enough will do as long as it is a clean DC voltage!  Would
> I expect to get less noise from a 723 based PSU compared to 7815/7915,
> or is this more a question of the smoothing, decoupling and board
> layout?  Are there any options which will make a better PSU than
> 7815/7915 but without the complexity of a 723 based PSU?
>
> Many questions, I hope some kind person can help me :)
>
> Seb
>
>
>
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