An Asymmetric Half Bridge Forward-Flyback Hybrid DC/DC Converter

Zero Voltage Switching of Two-switch Flyback- Forward Converter

FORWARD CONVERTER Jhao-Cyuan Huang, Yong-seng Wong, Kuo-Bin Liu, NSRRC, Hsinchu, Taiwan Abstract The traditional pulse-width-modulated flyback converter power switch has serious electromagnetic interference (EMI) and lower conversion efficiencies problems due to the hard-switching operations. This paper produces a zero voltage switching of flyback-forward converter with an active-clamp circuit,...

A New Soft Switching Flyback-forward Pwm Dc-dc Converter

This paper presents a new soft switching flyback-forward PWM converter. The proposed circuit employs an auxiliary circuit to achieve soft switching condition for switches and also absorbs the voltage spikes caused by the leakage inductance of transformers in the converter. In the proposed converter main switch operates at ZVS and the auxiliary switch operates at ZCS. The proposed converter has ...

Step up dcdc converter pdf

An introduction to LLC resonant half-bridge converter

Although in existence for many years, only recently has the LLC resonant converter, in particular in its half-bridge implementation, gained in the popularity it certainly deserves. In many applications, such as flat panel TVs, 85+ ATX PCs or small form factor PCs, where the requirements on efficiency and power density of their SMPS are getting tougher and tougher, the LLC resonant half-bridge w...

Dynamics Analysis of Lfr Model for a Single-stage High Power Factor Correction Diagonal Half-bridge Flyback Ac/dc Converter

By means of a graft scheme, a buck-boost cell and a wide range diagonal halfbridge flyback cell are combined to create a novel single-stage high power factor correction (HPFC) diagonal half-bridge flyback ac/dc converter in this paper. When both of the two cells operate in discontinuous conduction mode, the proposed converter exhibits high power factor and low bulk capacitor voltage stress inde...