Proceedings ArticleDOI
A Constant Current Digital Control Method for Primary-Side Regulation Active-Clamp Flyback Converter
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TLDR
A constant current digital control method with peak current control is proposed for primary-side regulation active-clamp (PSRAC) flyback in this paper to avoid the non-linearity and temperature drift of the opto-coupler.Abstract:
Active-clamp flyback converter is now widely used because higher efficiency is obtained with soft-switching technique. However, opto-coupler is always applied in the feedback loop to acquire the output signal. To avoid the non-linearity and temperature drift of the opto-coupler, a constant current digital control method with peak current control is proposed for primary-side regulation active-clamp (PSRAC) flyback in this paper. Considering the charge balance principle, the output current can be calculated and controlled with primary-side control and only one low speed digital to analogy converter (DAC), two comparators and a digital unit are required in discontinuous conduction modulation (DCM) mode. Based on the proposed method, constant output current is realized. The proposed control scheme was verified by a FPGA controlled 2.00-10.00V/2.00A ac-dc PSRAC flyback converter.read more
Citations
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Journal ArticleDOI
Hybrid Converter with Multiple Sources for Lithium Battery Charger Applications
TL;DR: In this article , a hybrid converter with multiple sources for lithium battery charger applications is proposed, where a flyback converter is selected for utility line sources, and a buck converter is adopted for PV arrays source.
High Precision Primary Side Regulation Constant Voltage Control Method for Primary and Secondary Resonant Active Clamp Flyback Converter
Qinsong Qian,Shen Xu,Shiyun Xu,Qi Liu,Song Ding,Cheng Gu,Ziyan Zhou,Limin Yu,Shengli Lu,Weifeng Sun +9 more
TL;DR: In this article , a high-precision primary side regulation (PSR) constant voltage control method for ACF converter is proposed to improve the power density of ACF system.
Proceedings ArticleDOI
Fractional-Order Modeling and Controls of a Flyback Converter for Voltage Regulation Tasks
TL;DR: In this paper , the fractional-order modeling, analysis, and control of a flyback converter for voltage regulation tasks is performed using fractional order representations of the capacitive and inductive elements on the converter.
Journal ArticleDOI
High Precision Primary Side Regulation Constant Voltage Control Method for Primary and Secondary Resonant Active Clamp Flyback Converter
TL;DR: In this article , a high-precision primary side regulation (PSR) constant voltage control method for ACF converter is proposed to improve the power density of ACF system.
Journal ArticleDOI
An Elimination Scheme of Long and Short Periods for Flyback Converter
TL;DR: In this paper , an adaptive over current protection (OCP) control scheme is adopted to eliminate long and short periods (LSP) emerging due to the inner control relationship of conventional flyback converter especially in CCM.
References
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Journal ArticleDOI
A High Efficiency Flyback Converter With New Active Clamp Technique
TL;DR: In this article, a flyback converter with a non-complementary active clamp control method is proposed, where the absorbed leakage energy is transferred to the output and input side.
Journal ArticleDOI
An Adaptive Output Current Estimation Circuit for a Primary-Side Controlled LED Driver
TL;DR: In this article, a smart output current estimation scheme was proposed to improve line regulation for constant on-time control, and it can be compatible with the current flyback topology, and the proposed scheme can improve the line regulation within 1.5% and power efficiency can be up to 89.7%.
Proceedings ArticleDOI
A high efficiency Flyback converter with new active clamp technique
TL;DR: In this paper, the authors proposed a flyback converter with a non-complementary active clamp method, which features high efficiency on both heavy load and light load conditions and the efficiency is almost not affected by the leakage inductance.
Journal ArticleDOI
High-Temperature GaN Active-Clamp Flyback Converter With Resonant Operation Mode
TL;DR: In this article, an isolated active-clamp flyback power supply with a new resonant operation mode is designed and experimentally tested for high ambient temperature (200 °C) operation.
Proceedings ArticleDOI
Active clamp flyback using GaN power IC for power adapter applications
Lingxiao Xue,Jason Zhang +1 more
TL;DR: In this article, the authors proposed an active clamp flyback (ACF) topology for zero voltage soft switching under all line and load conditions, eliminating all leakage inductance and snubber losses.