For a robotics project I needed to design a "light house" where it spins a light 360 degrees. I ended up making a hexagonal shape with 3 pairs of LED COBs to cover all 6 sides. I then designed a current sink for driving the leds (basic op amp + N fet) and since they don't make op amps in 3 packs, I went with a quad design. That left one empty current sink which accidentally fits the current rating of the DC motor (it's a small geared one). I have tested it for a short while and it seemed to spin the motor without any problems.
Are there any issues for long term use for either the sink circuit or the DC motor? I'm assuming the voltage across the motor goes all the way to VCC when changing poles because the op amp sees nothing for a while and that causes an initial current rush, since the inductance of the motor is quite low (again, small DC motor). Or maybe the back EMF from the motor can end up damaging the fets or the control circuit somehow? I'm just not sure if that's a good idea, but would be a very convenient one.