well here's the circuit and the 20mm disks and the 120mH inductor. i'm lookin to get as much volume as humanly possible within the extremely limited space i have. the inductor is exactly 6mm thick. and so is the housing it's gonna fit in, so i'm gonna use a booster and the hbridge driver to bump the voltage up to about 20V or more. i calculated IAVG at about 110mA at 2800Hz. i don't know about the kind of chip your talking about. if it means fewer parts, that would be great.Are you using a high current magnetic buzzer that needs Mosfets to drive its high current, or are you using a low current piezo transducer that uses such a low current that a Cmos Logic IC can drive it? A Cmos logic IC has six inverters in it that can drive it bridged.
edit: that's wrong Iavg is about 55mA.