I'm working on something where I need to take ~10VAC @ 60hz and step it up to around 90VAC @ 60hz. Ideally a small step-up transformer should be fine, but I'm having trouble identifying the part I need through any of the major components vendors. Everybody seems to focus on listing parts that step down from 120VAC to some value... searching for something designed to go the other way has been an exercise in frustration. Can any tell me if there's a secret to identifying these things? Even the "parametric search" at places like Newark and Mouser don't let you do a simple thing like selecting the primary side and secondary side voltages.
And, FWIW, yes, I know I could use a step down transformer and just treat the secondary as my primary. But then you run into limitations in regards to how much current the "cheat primary" can carry, etc. I'd really like to find a part that's designed specifically to be a step-up, that has a ratio around 1:9.