Dialog Semiconductor Gmbh

Mengfei Liu

Yimin Chen

Jianming Yao

Yong Li

Pengju Kong

Qingqing Zong

Fuqiang Shi

David H Nguyen

Tao Li

Hien Huu Bui

Guang Feng

Duc Doan

Wenduo Liu

Kai-Wen Chin

Juyoung Yoon

Xiaoyong Zhang

Yong Xiong Lin

Scott Brown

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 disclosed that times a detection time for each cycle of a power switch transistor. The detection time ends when a sense resistor voltage exceeds a threshold voltage. Over a half cycle of an AC input voltage to the flyback converter measures a series of detection time and determines a minimum detection time from the series of detection times. If the minimum detection time exceeds a brownout delay, a brownout condition exists. If the minimum detection time is less than an overvoltage delay, an overvoltage condition exists.

Flyback converter input voltage 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 power converter system comprises a switching power converter having a primary side and a secondary side that are electrically isolated from each other. A first controller on the primary side of the switching power converter controls a switch in the switching power converter on or off at a switching frequency of the switching power converter to regulate an output voltage of the switching power converter. A second controller on the secondary side of the switching power converter encodes information into one or more pulses such that a first duration between the consecutive pulses corresponds to a first logic level and a second duration between the consecutive pulses corresponds to a second logic level, the second duration being greater than the first duration.

Protocol for communication between secondary side and primary side of isolated switching power converters

The embodiments herein include a primary-side controller for a switching power converter that is capable of receiving a detection signal from a secondary-side detection circuit indicating that an output voltage has reached a condition. The controller determines the appropriate action once a detection signal has been received by distinguishing whether a dynamic load condition has been placed on the power supply versus other operating conditions.

Primary feedback switching power converter controller with intelligent determination of and response to output voltage drops due to dynamic load conditions

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Campbell, CA, United States of America

Mengfei Liu