Xuechao Liu

Title: Innovations of Xuechao Liu in Power Supply Technology

Introduction

Xuechao Liu is a prominent inventor based in Kanata, Canada, known for his significant contributions to power supply technology. With a total of seven patents to his name, Liu has developed innovative solutions that enhance the efficiency and performance of power electronics.

Latest Patents

One of Liu's latest patents is the "PFC optimization architecture for AC input AC/DC switching mode power supplies." This invention features an AC input AC/DC Switching Mode Power Supply (SMPS) equipped with Power Factor Correction (PFC). It includes a boost follower circuit (BFC) and a hybrid bulk capacitance circuit (HBCC), along with driver and control circuitry. The BFC adjusts the PFC output voltage based on the peak AC input voltage, improving low line efficiency and reducing losses. This design allows for stepless or step regulation modes to follow the AC input line voltage, ultimately enhancing the power density of isolated AC/DC power supplies.

Another notable patent is for "High accuracy current sensing for GaN power switching devices." This invention provides high accuracy current sense circuitry for GaN power transistors, enabling functions such as current loop control, over-current protection, and short-circuit protection. The design includes a current mirror sense GaN transistor and a power GaN transistor, along with a sampling circuit that utilizes operational amplifiers for fast response and improved accuracy. This technology is particularly beneficial for switching mode power supplies requiring high-speed and lossless current sensing.

Career Highlights

Throughout his career, Xuechao Liu has worked with leading companies in the power electronics industry, including Gan Systems Inc. and Infineon Technologies Canada Inc. His expertise in power supply design and current sensing has made him a valuable asset in these organizations.

Collaborations

Liu has collaborated with notable professionals in the field, including Yajie Qiu and Paul Wiener. These partnerships have contributed to the advancement of innovative technologies in power electronics.

Conclusion

Xuechao Liu's contributions to power supply technology through his patents and collaborations highlight his role as a leading inventor in the field. His work continues to influence the development of efficient power electronics solutions.