You will be interested in it--THB6064AH

[songzeyang]

A new stepper motor driver IC designed by a Chinese Company,but produced by TOSHIBA company.Many enginner have tested it,and they think it is going to be a perfect replacement for A3977 and TB6560 series.if you want to update your circuit board, maybe you can have a try.It has built-in thermal and o-current protection,so it will be a long life solution for the diy'rs.