Dialog Semiconductor Gmbh

Texas Instruments Corporation

Iwatt Inc.

Dialog Integrated Circuits (tianjin) Limited

Other

National Semiconductor Corporation

Diaglo Semiconductor Inc.

Fuqiang Shi

Yong Li

Robert Bogdan Staszewski

John William Kesterson

David H Nguyen

Jianming Yao

Roman Staszewski

Xiaolin Gao

Hien Huu Bui

Kai-Wen Chin

Pengju Kong

Cong Zheng

Duc Doan

Qiu Sha

Junjie Zheng

Jiang Chen

Juyoung Yoon

Weihai Huang

Judy Sha

Liang Yan

Clarita C Poon

Mengfei Liu

Andrew Kwok-Cheung Lee

Gordon Chen

Carrie Seim

Xiaye Wang

Henry Wong

Danna Suo

Roman Staszewki

A switching power converter is provided that communicates with a mobile device to receive a value of a load detection current. The switching power converter adjusts the cycling of a power switch until a constant current mode of operation is entered with a known output current driving the mobile device. The switching power converter subtracts the load current from the output current to measure a soft-short circuit current.

Short circuit and soft short protection for data interface charging

A device for determining impedance at a data pin of a communication interface. In one embodiment, the device includes a current source configured to selectively inject a test current to the data pin. The device also includes a sensing circuit for sensing a first test voltage corresponding to a voltage at the data pin without the test current injected, and a second test voltage corresponding to another voltage at the data pin with the test current injected. The sensing circuit determines the impedance at the data pin based on the first test voltage and the second test voltage.

USB data pin impedance detection

A flyback converter is provided with a controller that is configured to analyze the reflected feedback voltage waveforms to determine the presence of a ground connection fault for the auxiliary winding.

Auxiliary winding ground fault detection for isolated DC/DC converter

A novel and useful apparatus for and method of software based phase locked loop (PLL). The software based PLL incorporates a reconfigurable calculation unit (RCU) that is optimized and programmed to sequentially perform all the atomic operations of a PLL or any other desired task in a time sharing manner. An application specific instruction-set processor (ASIP) incorporating the RCU includes an instruction set whose instructions are optimized to perform the atomic operations of a PLL. The RCU is clocked at a fast enough processor clock rate to insure that all PLL atomic operations are performed within a single PLL reference clock cycle.

IC transmitter digital phase domain calculator with atomic computation units

A direct charging method is provided that alerts a mobile device when a switching power converter is operating in a constant-current mode to alert the mobile device of an output current without the use of a secondary-side current sense resistor.

Switching power converter for direct battery charging

Software reconfigurable digital phase lock loop architecture

A switching power converter is provided that cycles a power switch during a group pulse mode of operation to produce a train of pulses within a group period responsive to a control voltage being within a group mode control voltage range. Depending upon the control voltage, the number of pulses in each train of pulses is varied to provide a linear power delivery to the load.

Smart grouping control method for power converter switching noise management

Reconfigurable calculation unit with atomic computation units and control inputs

A line ripple compensation technique is provided for a switching power converter operating in both a pulse frequency mode of operation and a pulse width modulation mode of operation.

Line ripple compensation for switching power converters

History-based valley mode switching techniques and systems are provided to reduce the frequency spreading of switching noise in a switching power converter.

Switching power converter with history-based valley mode switching

A switching power converter is provided that includes a detector to detect whether a controller power supply voltage has fallen below a threshold voltage during a dormant period in which a power switch is no longer cycling to deliver power to a load. In response to a detection of such a threshold crossing by the detector, a controller powered by the controller power supply voltage is configured to cycle the power switch to replenish the controller power supply voltage.

Regulation of the power supply voltage for a flyback converter controller

Smart Grouping control method for power converter switching noise management

A variable-level flyback power converter is configured to provide an accurate output voltage at various regulation levels. The variable-level flyback power converter may include a switch coupled to a secondary winding of a transformer, a diode coupled to a primary winding of the transformer, and a controller coupled to the switch. The controller may scale an initial reference voltage based on a desired output voltage and a forward voltage drop across the diode, compare the scaled reference voltage with a feedback voltage sensed at an auxiliary winding of the transformer to generate an error signal, and modulate a pulse signal provided to the switch based on the error voltage.

Power converter with multiple output voltage levels and related methods

Growing community of inventors

Oak Park, IL, United States of America

Fuqiang Shi