Voltage level shift.

I'm looking to use a 3 volt logic pin to drive a full bridge where the full
bridge has a voltage from 3 to 7.2 volts. I also want to drive the bridge
at up to 100kHz.

I don't want to use a MOSFET to control one side of the bridge because I
don't want to waste the current while the control MOSFET is on.

Are there any good voltage level shift techniques or IC's I can use? I have
had no luck in finding such a thing.

 

[Ban]

abarnes@ns.greeneggsandspam.sympatico.ca wrote:

I'm looking to use a 3 volt logic pin to drive a full bridge where
the full bridge has a voltage from 3 to 7.2 volts. I also want to
drive the bridge at up to 100kHz.

may be this IC is all you need.
http://www.freescale.com/files/analog/doc/data_sheet/MPC17510.pdf
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPC17510&nodeId=01435979968446

I don't want to use a MOSFET to control one side of the bridge
because I don't want to waste the current while the control MOSFET is
on.

Well, this doesn't make sense to me, as a mosfet doesn't consume any current
in a static situation. With your 100kHz it will tho.

Are there any good voltage level shift techniques or IC's I can use?
I have had no luck in finding such a thing.

It was one of the first hits on Google. h-bridge driver
--
ciao Ban
Bordighera, Italy