Dialog Semiconductor (UK) Limited

Dialog Semiconductor Gmbh

Lijie Chen

Yimin Chen

Jiandong Zhang

Xiaoyong Zhang

Honglai Wang

Frank Kronmuller

Junyue Sun

Huibin Cao

Yufeng Zou

A method and apparatus for operating a semiconductor light source is presented. In particular there is a current regulator for regulating a current flowing through a light emitting diode device. The current regulator includes a first switch for receiving a first current flowing through the semiconductor light source and a control circuit coupled to the first switch and adapted to provide a second current proportional to the first current. The current regulator is adapted to regulate the first current using the second current.

Method and apparatus for operating a semiconductor light source

A power system and related methods provide sense resistor fault detection and safe operation of switching power converters and connected devices such as portable electronic devices powered by the switching power converter. The power system detects an open circuit or short circuit condition of the sense resistor and controls output current of the switching power converter to ensure safe operating conditions of the power system and connected equipment. The power system can also detect initial inrush current of the connected equipment and detect a duty cycle of the switching power converter to positively detect a short circuit condition of the sense resistor.

Sense resistor fault detection

Secondary controller for a flyback converter including a sense resistor fault detection

Growing community of inventors

Tianjin, China

Lijie Chen