Current Sensing Solutions for Power Supply Designers:While often considered a minor overhead function,measuring and controlling the currents in a power supply can easily become a major contributor to the success or failure of a design. To aid in achieving optimum solutions for this task, this topic will review the many strategies for current sensing, describe the options for appropriate sensing devices, and illustrate their application with practical design techniques. The distinction between current control and fault protection will be explored and applied to various power supply topologies with emphasis on performance-defining characteristics.