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rickt@gjcity.org
electronics forum beginner
Joined: 19 Jul 2006
Posts: 1
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 Posted: Wed Jul 19, 2006 3:12 pm Post subject:
DC to DC Converter with Multiple Outputs
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Hello Everyone,
I'm looking for a 12V dc input with multiple dc outputs. I need 5V and
8V out. The unit will go into a vehicle (12V) and needs to power a
thermal printer and a USB hub. Max load will be 25W.
Thanks,
RT |
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naser
electronics forum beginner
Joined: 17 Jul 2006
Posts: 5
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| Posted: Wed Jul 19, 2006 8:37 pm Post subject:
Re: DC to DC Converter with Multiple Outputs
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you can use a flyback switching regulator for your circuit.
but it is more simple to use two 7812and 7805 ic regulator
and you must then amlplify the out put current with a teransistor in
output of any one of regulators.
rickt@gjcity.org wrote:
| Quote: | Hello Everyone,
I'm looking for a 12V dc input with multiple dc outputs. I need 5V and
8V out. The unit will go into a vehicle (12V) and needs to power a
thermal printer and a USB hub. Max load will be 25W.
Thanks,
RT |
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Damir
electronics forum beginner
Joined: 30 Apr 2005
Posts: 36
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| Posted: Wed Jul 19, 2006 8:42 pm Post subject:
Re: DC to DC Converter with Multiple Outputs
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On 19 Jul 2006 13:37:00 -0700, "naser" <naser.yousofi@gmail.com>
wrote:
| Quote: | you can use a flyback switching regulator for your circuit.
but it is more simple to use two 7812and 7805 ic regulator
and you must then amlplify the out put current with a teransistor in
output of any one of regulators.
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7808, not 7812 |
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Tam/WB2TT
electronics forum Guru Wannabe
Joined: 17 May 2005
Posts: 106
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| Posted: Thu Jul 20, 2006 12:04 am Post subject:
Re: DC to DC Converter with Multiple Outputs
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<rickt@gjcity.org> wrote in message
news:1153321934.814105.240210@s13g2000cwa.googlegroups.com...
| Quote: | Hello Everyone,
I'm looking for a 12V dc input with multiple dc outputs. I need 5V and
8V out. The unit will go into a vehicle (12V) and needs to power a
thermal printer and a USB hub. Max load will be 25W.
Thanks,
RT
We had a requirement this this a few years ago. These were not the actual |
voltages, but we used a switching buck regulator to get the 8V, and a linear
regulator off the 8V to get the 5V. So long as you have a common ground, you
don't want a flyback regulator, unles you love winding transformers. If you
don't want to start from scratch, you could buy a little 8V module, and hang
the linear regulator on its output; possibly bolted to the 8V regulator
case.
Tam |
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