With a general understanding of the effects that basic motor characteristics have on motor operation, various DC motor technologies and prominent applications for those motors will now be reviewed. The basic control architecture for each type of motor will also be discussed. Shown on this slide are brushed DC motors and some of the common applications this type of motor is used for. Brushed DC motors are the lowest cost, most established motor technology and basically consist of a rotating armature driven by magnetic fields of opposing polarity. Electrical contact with the rotating commutator is made via the brushes. These motors are widely used in applications in many different industries, for example, brushed DC motors can be combined with a screw drive to provide linear movement of seats, locks, mobile platforms, etc. Also, when equipped with an offset rotational arm, brushed DC motors are used for cycling applications like pumps and wipers. Blowers are commonly driven with brushed DC motors, as are power tools when combined with a torque converter or gears. The most common way to control a brushed DC motor to spin in either direction is with an H-bridge. An H-bridge is made up of four transistors that are individually controlled to turn the motor in one direction or the other, or stop/brake motor operation. ST has products that integrate the H-bridge and control circuitry into a single device, or for added flexibility ST has H-bridge controllers such as the L99H01 which are specifically designed to drive four external transistors in an H-bridge configuration. In either configuration these products make motor control very straightforward via simple commands, with diagnostics that can be configured to monitor motor operation, flag fault conditions, and protect itself and the application in case of over-temperature or short-circuit conditions.