A Bulk-Capacitance Reduction Method Using Self-Driven Thyristor for AC–DC Converters

A 93.4% efficiency 42cc type-C power delivery adaptor with PMOS integration power line extension method

“…1, the expanded circuit is added with a switch PMOS Q1 in series with Cin and connection directly at GND for easy drive. 3 shows the principal waveforms of lineexpand circuit, similar with [29]. The difference is that here has a PMOS and related control circuits for easy drive and good integration into controller chip directly.…”

“…The next period is similar with the analysis above and not described here. More details are focus on the comparison with the existing methods [28,29,30] and benefits of PMOS control method in the next part.…”

“…SCR with self-drive is presented in Fig. 9 (b) [29] and Fig. 9 (c) shows the proposed PMOS connected on the bottom of the bus cap.…”

“…For simple and effective bulk cap reduction methods, paper [28] proposed one easy way to implement partial reduction for dc-link capacitance by adding one NMOS device. Based on this idea, paper [29] also presents one simple control method with self-driven thyristor. However, it doesn't have integration idea and this method is lossy.…”

“…The section 2 will present the operating principles of the basic idea. The section 3 will present the details of implement control methods and integration control circuits, furthermore it will give a comparison with methods [28,29,30]. The section 4 will give the experimental results with ultra-high-density type-c PD prototype.…”