Chueh-Kuei Jan

Title: Innovations of Chueh-Kuei Jan

Introduction

Chueh-Kuei Jan is a notable inventor based in Hsinchu County, Taiwan. He has made significant contributions to the field of power electronics, holding a total of five patents. His work focuses on improving the efficiency and functionality of power converters and drivers.

Latest Patents

One of his latest patents is titled "Control circuit for power converter and related control method." This invention includes a zero current detection circuit that detects the current flowing between an inductor and a voltage output terminal of the power converter. It generates a zero current detection signal, which is then used by an adjusting circuit to create an adjustment signal. This signal helps in adjusting the frequency of a clock signal through a clock signal generating circuit. Additionally, a periodical signal generating circuit produces a periodical signal based on the clock signal. An error detection circuit generates an error signal, while a control signal generating circuit produces a control signal to manage the operations of a power switch. If the number of pulses generated by the zero current detection circuit meets a predetermined condition, the adjusting circuit switches the power converter's operation mode from Discontinuous Conduction Mode (DCM) to Continuous Conduction Mode (CCM).

Another significant patent is focused on the "Efficiency improvement of a driver by using serially connected low voltage transistors or dynamic transistor size control." This innovation utilizes serially connected low voltage transistors to replace a high voltage transistor in a voltage conversion circuit for a driver. Alternatively, parallel connected sub-transistors can be used to create a high voltage transistor with an effective size that is dynamically adjusted according to the driver's loading. This approach reduces switching loss and enhances the overall efficiency of the driver.

Career Highlights

Chueh-Kuei Jan is currently employed at Richtek Technology Corporation, where he continues to develop innovative solutions in power electronics. His expertise and contributions have positioned him as a key figure in the industry.

Collaborations

He has collaborated with several talented individuals, including Shui-Mu Lin and Tsung-Wei Huang, who have contributed to his projects and innovations.

Conclusion

Chueh-Kuei Jan's work exemplifies the spirit of innovation in the field of power electronics. His patents reflect a commitment to enhancing efficiency and functionality in power conversion technologies. His contributions are valuable to the ongoing advancements in this critical area of technology.