For the next part of the Roland retrofit puzzle, I'm looking for some low current stepper drivers.

I had thought about some TB6xxx's given their low cost, but I'd like something with a bit more current adjustability, as I'm not sure what current I'll need, and the 0.5A jump in settings seem a bit high.

The original chips are TEA3718, which have a maximum current of 1.5A, but I'd guess are being pushed no where near that hard. Unfortunetly I can't seem to work out what current they're set to use, as the datasheet doesn't list any clear cut formula, and the final current is a result of motor feedback and resistors.

I've had a look at the 3D printer options, and although things like the Polulu and DRV8825 stuff ticks the boxes in terms of voltage/current adjustability, they're all DIP mount.

Any other cheap options to consider, or are some TB6600's and hoping 0.5A is good enough the most convenient option?