Whether you can use this or not depends on what your running current of the motor is. Your motor shouldn't under normal operation operate anywhere near the stall current if you are using it properly. You an also change resistor values on the IHM15A1 board to adjust the current limits if desired.
If you are only using one motor in your application I would suggest putting the IHM15A1 Shield into "Parallel Mode" which will redirect all of it's current capability into a single motor. This will give you 3A of drive current for the single motor. For a motor with 5A stall current this would be easily do what you need it to do.
