System General Corporation

Richtek Technology Corporation

Chen-Hui Chan

Ta-Yung Yang

Wei-Hsu Chang

Jenn-Yu G Lin

Yu-Chang Chen

Chou-Sheng Wang

Yi-Min Shiu

Shih-Hung Hsieh

Shao-Chun Huang

Chih-Wei Chi

An interface device includes: at least one configuration channel terminal for communicating configuration information, wherein whether the interface device itself is in connection and whether the interface device itself is at a high voltage side or a low voltage side are determined according to a voltage or current status at the configuration channel terminal; a multi-functional transmission line, which includes a thermistor; and a temperature monitor circuit, coupled to the multi-functional transmission line, for sensing a temperature status to generate a temperature sensing signal. When two interface devices are connected with each other, the thermistor and the temperature monitor circuit can be located together in one of the interface devices or separately located in different interface devices.

Interface device and interface temperature monitoring device

A switching regulator of a power converter is provided and includes a feedback-input circuit, a programming circuit, and a peak-current-threshold circuit. The feedback-input circuit is coupled to a terminal of the switching regulator for receiving a feedback signal. The feedback-input circuit is operated in a first range of a terminal signal. The programming circuit is coupled to the terminal for generating a programming signal. The programming signal is operated in a second range of the feedback signal. The peak-current-threshold circuit generates a threshold signal in accordance with the programming signal. The feedback signal is coupled to regulate the output of the power converter, and the threshold signal is coupled to limit a peak switching current of the power converter.

Switching regulator having terminal for feedback signal inputting and peak switching current programming

A synchronous rectifying circuit of a resonant switching power converter is provided to improve the efficiency. The synchronous rectifying circuit includes a power transistor and a diode connected to a transformer and an output ground of the power converter for rectifying. A sense transistor is coupled to the power transistor for generating a mirror current correlated to a current of the power transistor. A controller generates a driving signal to control the power transistor in response to a switching-current signal. A current-sense device is coupled to the sense transistor for generating the switching-current signal in response to the mirror current. The controller enables the driving signal to turn on the power transistor once the diode is forwardly biased. The controller generates a reset signal to disable the driving signal and turn off the power transistor once the switching-current signal is lower than a threshold.

Offline synchronous rectifying circuit with sense transistor for resonant switching power converter

Growing community of inventors

Taipei, Taiwan

Chen-Hui Chan