I don't quite understand.I will try to use 12-24v and adjustable current through L297's Vref volt and bridge's sense resistor combination.
Thank you, of course you are right. Not a big problem to add a few resistors.HP1729, your suggestion will result in smoking rubble, as once the P-channel MOSFETs are turned on their is no current path to turn them back off, and when their corresponding N-channel MOSFET turns on, the current from the source will be limited only by the Rds (ON) of the MOSFETs and the sense resistor.