Location History:
- Kyungki-do, KR (2001)
- Bucheon, KR (2001)
Company Filing History:
2 out of 354 
1 out of 131,500 
Years Active: 2001
Title: Kyung-Hee Jang: Innovator in Power Factor Correction Technologies
Introduction
Kyung-Hee Jang is a notable inventor based in Kyungki-do, South Korea. He has made significant contributions to the field of power factor correction, holding a total of 3 patents. His work focuses on enhancing the efficiency of power supply systems, which is crucial in today's energy-conscious environment.
Latest Patents
Kyung-Hee Jang's latest patents include innovative technologies that improve power factor correction. One of his patents is a Power Factor Correction (PFC) circuit, which features a boost converter that generates an output voltage to a secondary load based on the operation of a switch. This circuit includes a switching controller that multiplies a secondary side error voltage of the boost converter with a voltage representative of the input current. The controller then compares this multiplied voltage with a reverse sawtooth wave voltage to control the switch accordingly.
Another significant patent is the Power Factor Compensation Controller, designed for use in a switching power supply. This controller incorporates a multiplier that combines an error signal with a current signal from the switch to produce an output signal. It also features an adder that integrates this output with a lower reference signal, and a comparator that assesses the adder output against an upper reference signal. The controller ensures that the peak currents in the switch are in-phase with the input voltage, optimizing the performance of the power supply.
Career Highlights
Throughout his career, Kyung-Hee Jang has worked with prominent companies in the semiconductor and electronics industries. He has been associated with Fairchild Korea Semiconductor Ltd. and Samsung Electronics Co., Ltd., where he has contributed to various projects focused on power electronics and efficiency improvements.
Collaborations
Kyung-Hee Jang has collaborated with several professionals in his field, including Sang-Woo Lee and Nak-Choon Choi. These collaborations have likely enriched his work and contributed to the development of innovative solutions in power factor correction.
Conclusion
Kyung-Hee Jang's contributions to power factor correction technologies demonstrate his commitment to innovation and efficiency in electrical engineering. His patents reflect a deep understanding of power supply systems and their optimization, making him a valuable figure in the field.