L
Liang Yan
Publications - 21
Citations - 506
Liang Yan is an academic researcher. The author has contributed to research in topics: Dimmer & Voltage. The author has an hindex of 11, co-authored 21 publications receiving 506 citations.
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Patent
On-time control for constant current mode in a flyback power supply
TL;DR: In this article, a primary side sensing power control system and method for constant current control that utilizes a relationship that involves the measured reset-time from the previous cycle to determine the primary side peak current and off-time for the next cycle.
Patent
Adaptive control for transition between multiple modulation modes in a switching power converter
TL;DR: In this article, the PWM and PFM modes are separated into two independent control sections with the control voltage range in each control section determined independently, and each of the modes cannot operate continuously beyond its boundaries, thereby forming a control gap between the two control sections within which no continuous operation is allowed.
Patent
Detecting light load conditions and improving light load efficiency in a switching power converter
TL;DR: In this article, a switching power converter detects low load conditions based on the ratio of a first peak current value for peak current switching in constant voltage regulation mode to a second peak current values for peak-current-switching in constant current regulation mode.
Patent
Adaptive multi-mode digital control improving light-load efficiency in switching power converters
TL;DR: In this paper, the authors propose a switch-mode power converter that reduces current in the power converter using a second pulsewidth-modulation (PWM) mode before reaching switching frequencies that generate audible noises.
Patent
System And Method For Controlling A Current Limit With Primary Side Sensing Using A Hybrid PWM and PFM Control
TL;DR: In this article, a hybrid constant current control system that uses both PWM and PFM control is presented, which avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices.