On 01/02/2011 22:37, Joemill Flordelis wrote:
> Hi Guys,
>
> I'm saying HI to everyone, since I'm a newbie here. :)
>
> I'm building an amplifier using OPA454 to drive a piezo. The op-amp
> will be a dual power supply using +/-30V power supply. I was wondering
> if you could help me out design a +/-30V power supply from a +12V
> power supply. Kindly recommend to me boost regulators and give me tips
> on the circuit design.
>
>

Hi and welcome to the list..

An H-bridge may indeed be more convenient than using a dual supply, but=20
it would be good to know a little more about your circuit and what you=20
want it to do.
Either way you want to boost the voltage. There are many switching ICs=20
available that will do this okay, a few questions - what is the current=20
you will need, how efficient/clean do you want it, how much space do you=20
have, are you looking for SMD or through hole parts?
On the other hand, using a simple inverter as Bob suggested might be=20
better - more info on the piezo you are driving would be good, as some=20
need very high voltages and can be difficult loads to drive.
Anything else you can think of mentioning (e.g acceptable price ranges,=20
a rough idea of what you already know) will help folk to give the best=20
advice.





--=20
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