Hongxia Yu

Title: Innovations of Hongxia Yu

Introduction

Hongxia Yu is a notable inventor based in Hangzhou, China. He has made significant contributions to the field of LED driver technology, holding 2 patents that showcase his innovative approach to electrical engineering.

Latest Patents

One of his latest patents is the "TRIAC dimmer compatible LED driver and method thereof." This invention provides a controller used in a TRIAC dimmer compatible LED driver. The controller comprises a dimming signal generator, a dimming signal processor, and a switch control circuit. The dimming signal generator receives an AC chopped voltage from a TRIAC dimmer and generates a dimming signal with a regulated duty cycle in accordance with the AC chopped voltage. The dimming signal processor is coupled to the dimming signal generator and generates a processed dimming signal based on the dimming signal. The duty cycle of the processed dimming signal is a sum of a predetermined duty cycle and the duty cycle of the dimming signal. Based on the processed dimming signal and a feedback signal indicative of the current flowing through the LED, the switch control circuit generates a control signal to control at least one switch in a switching converter.

Another significant patent is the "Fast startup switching converter and method thereof." This invention features a fast startup switching converter that includes a first switch, a second switch, a third switch, a first capacitor, and a controller that manages the ON and OFF switching of the second and third switches. The first terminal of the first switch is coupled to the input terminal of the switching converter, while the second terminal is connected to the first terminal of the second switch. The first terminal of the third switch is linked to the second terminal of the first switch and the first terminal of the second switch. The first capacitor is connected to the second terminal of the third switch and the controller to provide a power supply voltage for the controller. The switching converter charges the first capacitor through the first and third switches in a first working state and transfers energy to a load through the first and second switches in a second working state.

Career Highlights

Hongxia Yu is currently employed at Chengdu Monolithic Power Systems Co., Ltd. His work focuses on developing advanced technologies that enhance the efficiency and performance of LED drivers and switching converters.

Collaborations

He collaborates with talented coworkers, including Naixing Kuang and Jiali