Designing the Hardware Configuration for the UCD92xx Family of Digital Power

This application report details the hardware configuration surrounding any of the UCD92xx digital power supply controllers. How to terminate and connect each pin on these devices for a typical application is discussed in detail and explained with examples. Emphasis is placed on the necessary components (mostly resistors and capacitors) and how to size them based on the system requirements for the power supply. Brief mention is given to the corresponding parameters in the Fusion Digital Power Designer (the GUI). This application report describes all the functions of the UCD9220 controller in particular, but the description applies to any other UCD92xx controller. The appendixes detail pins and functions that are unique to the UCD9240.