Power supply design

[Dejan Uzelac]

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

 

[Tomi Holger Engdahl]

"Dejan Uzelac" <uzelac@optushome.com.au> writes:

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/

 

[Jerry G.]

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

 

[Sal Brisindi]

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:

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