actually The one that you posted can handle 4amp its just that you need to connect both A and B together. meaning its logic and its output. this is cause the IC is made to drive 2 DC motor with current of 2A each.
actually The one that you posted can handle 4amp its just that you need to connect both A and B together. meaning its logic and its output. this is cause the IC is made to drive 2 DC motor with current of 2A each.