On Wed, 02 Feb 2011 06:37 +0800, "Joemill Flordelis" wrote:
> I'm saying HI to everyone, since I'm a newbie here. :)

Welcome.
=20
> 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.
>=20
> Any help would be very much appreciated.

My first thought is "will +/-24V be enough"? If so, can you run the
piezo in bridge mode, ie instead of one side of the piezo at ground and
the other to the opamp, can you tie the two sides of the piezo each from
their own opamp? If so, you can just run two opamps in bridge mode from
+/-12V and the piezo will see +/-24V as Olin suggested.

If not, and you really need +/-30V supply, can you wind your own
magnetics? If so, and it doesn't need to be very efficient, a two
transistor astable multivibrator type of upconverter would be pretty
easy.

Cheerful regards,

Bob

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