Well, after various ideas were thrown around, the prototype board sent=20
out used a 3 Amp 12V LDO !

In the end the client changed (relaxed) some of the parameters and a=20
simple linear reg made the most sense.

Thank you to everyone who posted on this.  It still gave me ideas for=20
next time.
David...

On 17/01/2013 2:18 PM, David Duffy (AVD) wrote:
> I have the need to regulate the voltage going out to some LED strips.
> These strips are simple 12V DC types that have 3 LEDs and a resistor per
> section, repeating throughout the strip.
>
> The voltage available is nominally 12V, but can vary between 12V and
> 14V.  The ability to handle up to 18V input is also desired by the
> client.  The current draw of the LED load is approx 3 Amps.
>
> I was thinking of a simple 12V LDO, but at 2V differential that's 6
> Watts in heat - ouch!  Ideally this unit needs to run with minimal heat
> dissipation.  I also thought about a SEPIC converter, but that would
> take too long to design and debug and be overkill for this application.
>

--=20
___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
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