Dialog Semiconductor Gmbh

Dialog Semiconductor (uk) Limited

Koninklijke Philips Corporation N.V.

Yimin Chen

Jianming Yao

Mengfei Liu

Nailong Wang

Yong Li

Xiaolin Gao

Zhiqiu Ye

Xiaoyong Zhang

Jiandong Zhang

David H Nguyen

Pengju Kong

Dickson T Wong

Ajay Tripathi

Juyoung Yoon

Raman Nair Harish Gopala Pillai

Qingqing Zong

Kaustuva Acharya

Honglai Wang

Lijie Chen

Frank Kronmuller

Junjie Zheng

Liang Yan

Tao Li

Guang Feng

Duc Doan

Yuhong Fang

Kai-Wen Chin

Clarita C Poon

Mark Eason

Chuanyang Wang

Guanou Yang

Lingxin Kong

Jun Zheng

Yong Xiong Lin

Arun Ganesh

Nicholaos Hillas

Romel Panlilio

Feng-Kang Hu

Huaming Guo

Nicolaas Hendrik Mario Pol

Scott Brown

Zhaowu Luo

Benny Hou

A flyback converter is provided that detects a load-transient-produced increase in the output current to more quickly detect and respond to the load transient.

Flyback converter with fast load transient detection

A flyback converter is provided that dynamically adjusts a drain threshold voltage for a current cycle of a synchronous rectifier switch transistor based upon operating conditions in a previous cycle of the synchronous rectifier switch transistor. A differential amplifier drives a gate voltage of the synchronous rectifier switch transistor during an on-time of the current cycle so that a drain voltage of the synchronous rectifier switch transistor equals the drain threshold voltage during a regulated portion of the current cycle.

Adaptive gate regulation for a synchronous rectifier flyback converter

A flyback converter is provided that compares a drain-to-source voltage of a synchronous rectifier switch transistor to a negative threshold voltage to detect whether the synchronous rectifier switch transistor has a partially-open or an open fault condition. The flyback converter also compares a gate terminal voltage of a gate driver to the synchronous rectifier switch transistor to a positive threshold voltage to detect whether the synchronous rectifier switch transistor has a gate open or a gate short-circuit fault condition.

Flyback converter with synchronous rectifier switch fault detection

A switch detection circuit is provided that senses the voltage on a rectifying component for rectifying a secondary winding current through a secondary winding of a flyback converter's transformer to determine whether a power switch transistor attached to a primary winding of the transformer has ceased cycling.

Input voltage detection for flyback converter

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

A flyback converter controller is provided with secondary-side controller that adjusts a discharge current form an output voltage rail during a communication period with a primary-side controller to maintain the output voltage within regulation.

Dynamic discharge current control for improving power supply output regulation

A switching power converter is disclosed that communicates a thermal alarm to a mobile device over a data channel in a data cable for charging the mobile device.

Thermal de-rating for a multi-mode switching power converter

A switching power converter is provided with an overvoltage protection circuit that softly switches on a power bus switch during a soft-start period responsive to a device connecting to a data cable for receiving power over a power bus coupled to the power bus switch.

Short circuit protection for data interface charging

A universal serial bus (USB) charger provides power to a client device. A USB connector interfaces with a client device and receives a request for the output voltage of the USB charger to be at a specific value. If the requested voltage level is lower than the current output voltage level, the output voltage level is set to the requested level and a bleeder circuit is enabled to discharge the output capacitor of the USB charger.

USB power converter with bleeder circuit for fast correction of output voltage by discharging output capacitor

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

An data transmission method is provided for transmitting analog data through an isolating device using a calibration input pulse and a data input pulse. The analog data may represent, for example, the desired dimming value for a flyback converter powering a solid state lighting system.

LED dimming with slow data channel transmission

A switching power converter is provided that extrapolates from a reference voltage during dead periods of a rectified input voltage as determined from a comparison of an Isense voltage to a current threshold.

Single stage switching power converter with improved primary only feedback

A power converter with a dynamic preload. The power converter includes a magnetic component coupled between an input and an output of the power converter. The output of the power converter has an output voltage for providing power to a load. A switch is adapted to control current through the magnetic component according to on and off times of the switch. A dynamic preload circuit is coupled to the output of the power converter. The dynamic preload has loading characteristics that are adjusted responsive to a signal indicative of an output voltage at the output of the power converter.

Power converter with dynamic preload

A switching power converter is provided that switches between low-bandwidth PI control and a high-speed control of an output voltage responsive to comparing the output voltage to an upper output voltage limit and to a lower output voltage limit. The switching power converter adapts the upper and lower voltage limits responsive to a load demand.

High power factor power converters with adaptive output voltage limits for fast dynamic load response

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Campbell, CA, United States of America

Yimin Chen