To meet the ever-increasing demands for small-lightweight consumer chargers, solutions to achieve higher switching frequencies are required. In this article, we show that it is essential to implement a synchronous… Click to show full abstract
To meet the ever-increasing demands for small-lightweight consumer chargers, solutions to achieve higher switching frequencies are required. In this article, we show that it is essential to implement a synchronous rectifier for furthering advancements in power density. The shortcomings of diodes are illustrated, and their main disadvantage being their large power losses ranging from 600 to 2500 mW. We propose a synchronous rectifier based on a phase-locked loop (PLL). An application-specific integrated circuit containing a PLL designed for a synchronous rectifier was taped out in a 0.18-
               
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