Basics of Design: Low-Load Efficiency

Switching power supply users used to be happy to get peak efficiencies near 90% at an operating point around 88% of full load. Today, peak efficiencies above 90% are achievable, and the challenge is to maximize efficiency at lower current draws, where most systems spend much of their operating time, thanks to "sleep" modes, etc. This Basics of Design describes the techniques power supply designers are using today to "flatten" the efficiency curve across the widest possible range of load demands. Fill out this brief form to access this important Basics of Design. - Intersil