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

 

[naser]

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.

 

[Damir]

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.

7808, not 7812

 

[Tam/WB2TT]

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