In a DC/DC converter, the auxiliary power supply of multiple switching devices requires independent isolated power supplies. Taking a full-bridge converter as an example, the high-side and low-side MOSFETs (HS-FETs and LS-FETs, respectively) of the bridge arm require isolated power supplies for the gate driver circuit. The traditional scheme uses a bootstrap circuit to power supply both the upper ...

PFC converters are widely used in the industry to provide DC output voltage from the main lines, and to maintain a high power factor (PF) and low current distortion at the same time. In some of these applications, such as telecom, server, workstation power supplies, and plug-in electric vehicles, the active input power needs to be measured in real time in order to monitor energy consumption, as we...

Fast-charge technology has developed rapidly in the last few years due to the exponential increase in power demand for mobile devices. In late 2020, cell phone market leaders (such as Apple, Xiaomi, and Samsung) started to abandon in-box adapters for cell phones. This change stimulated another boom for the demand of aftermarket adapters, and also confirmed two trends for the fast-charging adapter ...

Before continuing to this article, make sure to read Live Digital Solutions for Efficient Power Supply Designs (Part I). MPS’s HR121x family of products are rich in digital and analog functions. These PFC + LLC combo controllers are highly integrated, and offer reduced power consumption that makes them well suited for standby power applications. They can work in either discontinuous conduct...

With the continued rapid development of various electronic products, high-efficiency power supply design requirements are continually evolving. The high-efficiency conversion circuits defined in textbooks can no longer meet the actual needs of the market, because achieving high efficiency under rated operating conditions is just one of the requirements. A truly competitive power supply design must...

LLC resonant converters have become a cornerstone in power electronics, and widely adopted across various markets due to their ability to achieve high efficiency while minimizing electromagnetic interference (EMI) through soft-switching techniques. LLC topology offers several configurations optimized for specific applications. In particular, there are two prominent configurations for the primary s...