Tso Min Chen

Title: Innovations of Tso Min Chen

Introduction

Tso Min Chen is a notable inventor based in Taichung, Taiwan. He has made significant contributions to the field of power electronics, particularly in the development of control circuits for power factor correction converters and synchronous rectifiers. With a total of 3 patents, his work has advanced the efficiency and functionality of power conversion technologies.

Latest Patents

One of Tso Min Chen's latest patents is a "Switching control circuit for discontinuous mode PFC converters." This invention features a switching control circuit that includes a detection terminal, input terminal, ramp generator, program terminal, error amplifier, mix circuit, and delay circuit for power factor control. The detection terminal generates a signal in response to inductor discharge, while the input terminal detects a switching current signal. The program terminal determines the slew rate of the ramp signal and the maximum on-time of the switching signal. The error amplifier generates an error signal for output regulation, and the mix circuit produces a mixing signal proportional to the ramp and switching current signals. The switching signal is activated based on the detection signal and deactivated according to the error signal, with the slew rate of the mixing signal increasing in response to input voltage changes.

Another significant patent is the "PWM controller for synchronous rectifier of flyback power converter." This synchronous rectifier PWM (SR-PWM) controller manages a MOSFET based on the secondary current value and the status of a synchronous signal for both discontinuous and continuous operation modes. The secondary current is generated in a secondary circuit and detected by two threshold-detection terminals of the SR-PWM controller. The controller produces a synchronous signal by detecting a transformer switching signal. A delay time is incorporated after the MOSFET is turned off to ensure proper operation before the next switching cycle begins. Notably, the equivalent series resistance (ESR) of an output capacitor can serve as a sensor to detect the secondary current, eliminating the need for an additional current sensor.

Career Highlights

Tso Min Chen is currently employed at System General Corporation, where he continues to innovate in the field of power electronics. His work has been instrumental in enhancing the performance and reliability of power conversion systems.

Collaborations

Tso Min Chen collaborates with talented individuals such as Ta-Yung Yang and Pei-Sheng Tsu, who contribute to the innovative environment at