MC33926 is a H-Bridge from freescale. This driver allow to use it to drive a DC-Motor using 3 different driving methods: - Lock Antiphase - Sign-Magnitude braking - Sign-Magnitude coasting I used this board https://www.sparkfun.com/products/11080 for my tests and find a lot of informations here: http://modularcircuits.tantosonline.com/blog/articles/h-bridge-secrets/h-bridge-control/