| Author |
Message |
Dejan Uzelac
Guest
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 Posted:
Thu Feb 10, 2005 8:40 am Post subject:
Power supply design |
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Hi.
I have an adapter with an output of 9V 1A DC adapter.
I need to convert this to 5V, 2A?
Any idea how I can make a little power supply circuit or something to
achieve this?
THANX
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Tomi Holger Engdahl
Guest
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| Posted:
Thu Feb 10, 2005 4:13 pm Post subject:
Re: Power supply design |
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"Dejan Uzelac" <uzelac@optushome.com.au> writes:
| Quote: | Hi.
I have an adapter with an output of 9V 1A DC adapter.
I need to convert this to 5V, 2A?
Any idea how I can make a little power supply circuit or something to
achieve this?
|
There is no design that can achieve this.
What your power supply gives is: 9V * 1A = 9W
What you want out is: 5V * 2A = 10W
There is no power supply design that can give out power
that you feed into it. In practical power supplies
you typically get out 50-85% of the power you feed to them.
This means that you would be able to get only about 1.5A
of 5V power with a good power supply circuit design
(a well designed switch mode power supply).
--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/ |
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Jerry G.
Guest
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| Posted:
Fri Feb 11, 2005 11:34 pm Post subject:
Re: Power supply design |
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Your converter is rated at 1 amp to start with, therefore you will need
something that can delivery 2 amps or more. It would be more prudent to
invest in the proper power supply for what you want to do.
--
Jerry G.
======
"Dejan Uzelac" <uzelac@optushome.com.au> wrote in message
news:420acbcb$0$1019$afc38c87@news.optusnet.com.au...
Hi.
I have an adapter with an output of 9V 1A DC adapter.
I need to convert this to 5V, 2A?
Any idea how I can make a little power supply circuit or something to
achieve this?
THANX
|
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| Back to top |
|
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Sal Brisindi
Guest
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| Posted:
Sun Feb 13, 2005 6:10 am Post subject:
Re: Power supply design |
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Here is a 5volt 2 amp power supply on ebay now for $3.00. I am not the
seller, just happened to come across it.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=36323&item=3872706131&rd=1
Regards,
Sal
Dejan Uzelac wrote:
| Quote: | Hi.
I have an adapter with an output of 9V 1A DC adapter.
I need to convert this to 5V, 2A?
Any idea how I can make a little power supply circuit or something to
achieve this?
THANX |
|
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| Back to top |
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