Currently having a problem deciding on power supplies for our DSP audio
board.
The available inputs are limited to 5V *or* 12V from a PC, and I need to
derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and opamps.
Any suggestions on PSU chips, switching v linear, filtering etc? I was going
to copy the setup used on the EZLITE boards, but that seems optimised for 7V
input and does not address the +/-12V requirement. The additional constraint
is that at least the +/- 12V needs to be low noise since it is for the audio
o/p.
Dirk
Power supplies
Started by ●August 7, 2008
Reply by ●August 7, 20082008-08-07
On Thu, 7 Aug 2008, Dirk Bruere wrote:
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was going
> to copy the setup used on the EZLITE boards, but that seems optimised for 7V
> input and does not address the +/-12V requirement. The additional constraint
> is that at least the +/- 12V needs to be low noise since it is for the audio
> o/p.
Howdy Dirk,
I've used both TI and Linear buck and boost supplies for systems that need
1.2, 1.8, 2.5, 3.3 and 20V on one board. It used a battery feed. All our
current draws were under an Amp per supply though, so it was pretty easy.
The 5V PC supply is pretty robust, if it were me I'd use that as the
source and derive all my other power lines from that.
An alternate choice is to use off the shelf DC-DC converters. Many of
them will accept either 5 or 12 V inputs.
Patience, persistence, truth,
Dr. mike
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was going
> to copy the setup used on the EZLITE boards, but that seems optimised for 7V
> input and does not address the +/-12V requirement. The additional constraint
> is that at least the +/- 12V needs to be low noise since it is for the audio
> o/p.
Howdy Dirk,
I've used both TI and Linear buck and boost supplies for systems that need
1.2, 1.8, 2.5, 3.3 and 20V on one board. It used a battery feed. All our
current draws were under an Amp per supply though, so it was pretty easy.
The 5V PC supply is pretty robust, if it were me I'd use that as the
source and derive all my other power lines from that.
An alternate choice is to use off the shelf DC-DC converters. Many of
them will accept either 5 or 12 V inputs.
Patience, persistence, truth,
Dr. mike
Reply by ●August 7, 20082008-08-07
What will be the implication of using zener diodes? I am not sure the effect
of this at different points along the power rail. What do you think?
Dele
----- Original Message -----
From: "Dirk Bruere"
To:
Sent: Thursday, August 07, 2008 6:56 PM
Subject: [adsp] Power supplies
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and
> opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was
> going
> to copy the setup used on the EZLITE boards, but that seems optimised for
> 7V
> input and does not address the +/-12V requirement. The additional
> constraint
> is that at least the +/- 12V needs to be low noise since it is for the
> audio
> o/p.
>
> Dirk
>
of this at different points along the power rail. What do you think?
Dele
----- Original Message -----
From: "Dirk Bruere"
To:
Sent: Thursday, August 07, 2008 6:56 PM
Subject: [adsp] Power supplies
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and
> opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was
> going
> to copy the setup used on the EZLITE boards, but that seems optimised for
> 7V
> input and does not address the +/-12V requirement. The additional
> constraint
> is that at least the +/- 12V needs to be low noise since it is for the
> audio
> o/p.
>
> Dirk
>
Reply by ●August 8, 20082008-08-08
On Fri, 8 Aug 2008, DSP Develop wrote:
> Interesting, Ive similar problem, need of DC DC converter but only 250mA
> (ADM660) and only available in 5V. Do you have reference for 12V and more
> than 250mA (1A would be great)
check out these:
http://www.lambdapower.com/ftp/Specs/cc-e.pdf
Digikey has a great search engine - start with dc-dc converters and go
from there.
> Interesting, Ive similar problem, need of DC DC converter but only 250mA
> (ADM660) and only available in 5V. Do you have reference for 12V and more
> than 250mA (1A would be great)
check out these:
http://www.lambdapower.com/ftp/Specs/cc-e.pdf
Digikey has a great search engine - start with dc-dc converters and go
from there.
Reply by ●August 8, 20082008-08-08
Interesting, Ive similar problem, need of DC DC converter but only 250mA
(ADM660) and only available in 5V. Do you have reference for 12V and more
than 250mA (1A would be great)
Thanks
_____
De : a... [mailto:a...] De la part de Mike
Rosing
Envoy: jeudi 7 ao 2008 20:43
: Dirk Bruere
Cc : a...
Objet : Re: [adsp] Power supplies
On Thu, 7 Aug 2008, Dirk Bruere wrote:
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and
opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was
going
> to copy the setup used on the EZLITE boards, but that seems optimised for
7V
> input and does not address the +/-12V requirement. The additional
constraint
> is that at least the +/- 12V needs to be low noise since it is for the
audio
> o/p.
Howdy Dirk,
I've used both TI and Linear buck and boost supplies for systems that need
1.2, 1.8, 2.5, 3.3 and 20V on one board. It used a battery feed. All our
current draws were under an Amp per supply though, so it was pretty easy.
The 5V PC supply is pretty robust, if it were me I'd use that as the
source and derive all my other power lines from that.
An alternate choice is to use off the shelf DC-DC converters. Many of
them will accept either 5 or 12 V inputs.
Patience, persistence, truth,
Dr. mike
(ADM660) and only available in 5V. Do you have reference for 12V and more
than 250mA (1A would be great)
Thanks
_____
De : a... [mailto:a...] De la part de Mike
Rosing
Envoy: jeudi 7 ao 2008 20:43
: Dirk Bruere
Cc : a...
Objet : Re: [adsp] Power supplies
On Thu, 7 Aug 2008, Dirk Bruere wrote:
> Currently having a problem deciding on power supplies for our DSP audio
> board.
> The available inputs are limited to 5V *or* 12V from a PC, and I need to
> derive 1V2, 3V3, 5V, 12V and -12V to power the DSP, peripherals and
opamps.
> Any suggestions on PSU chips, switching v linear, filtering etc? I was
going
> to copy the setup used on the EZLITE boards, but that seems optimised for
7V
> input and does not address the +/-12V requirement. The additional
constraint
> is that at least the +/- 12V needs to be low noise since it is for the
audio
> o/p.
Howdy Dirk,
I've used both TI and Linear buck and boost supplies for systems that need
1.2, 1.8, 2.5, 3.3 and 20V on one board. It used a battery feed. All our
current draws were under an Amp per supply though, so it was pretty easy.
The 5V PC supply is pretty robust, if it were me I'd use that as the
source and derive all my other power lines from that.
An alternate choice is to use off the shelf DC-DC converters. Many of
them will accept either 5 or 12 V inputs.
Patience, persistence, truth,
Dr. mike
Reply by ●August 27, 20082008-08-27
Hi,
Limited to 0.45A for dual outputs, not more? Other idea or reference?
Regards
-----Message d'origine-----
De: Mike Rosing [mailto:e...@eskimo.com]
Envoy vendredi 8 ao 2008 14:56
: DSP Develop
Cc: 'Dirk Bruere'; a...
Objet: RE: [adsp] Power supplies
On Fri, 8 Aug 2008, DSP Develop wrote:
> Interesting, Ive similar problem, need of DC DC converter but only 250mA
> (ADM660) and only available in 5V. Do you have reference for 12V and more
> than 250mA (1A would be great)
check out these:
http://www.lambdapower.com/ftp/Specs/cc-e.pdf
Digikey has a great search engine - start with dc-dc converters and go
from there.
Limited to 0.45A for dual outputs, not more? Other idea or reference?
Regards
-----Message d'origine-----
De: Mike Rosing [mailto:e...@eskimo.com]
Envoy vendredi 8 ao 2008 14:56
: DSP Develop
Cc: 'Dirk Bruere'; a...
Objet: RE: [adsp] Power supplies
On Fri, 8 Aug 2008, DSP Develop wrote:
> Interesting, Ive similar problem, need of DC DC converter but only 250mA
> (ADM660) and only available in 5V. Do you have reference for 12V and more
> than 250mA (1A would be great)
check out these:
http://www.lambdapower.com/ftp/Specs/cc-e.pdf
Digikey has a great search engine - start with dc-dc converters and go
from there.
