Here’s a jellybean chip – a DC motor driver. This device has all the logic to drive a small motor, such as that used to drive the tray of a CD drive in both directions. The control logic is at the bottom of the die, while the main power transistors are at the top, in H-Bridge formation.
![TA7291 Die](http://www.experimental-engineering.co.uk/wp-content/uploads/2017/02/TA7291_000-TA7291_020_blended_fused-300x277.png)