This paper presents a high step-down tranformerless single-stage single-switch ac/dc converter suitable for universal line applications (90–270 Vrms ). The topology integrates a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell and part of the input power is coupled to the output directly after the first power processing. With this direct power transfer feature and shari...

Abstract: In this study, a novel, non-isolated, cascade-type, single-switch, high step-up DC/DC converter was developed for green energy systems. An integrated coupled inductor and voltage lift circuit were applied to simplify the converter structure and satisfy the requirements of high efficiency and high voltage gain ratios. In addition, the proposed structure is controllable with a single sw...

A new passive Power Factor Corrector (PFC) based on Valley Fill (VF) is proposed for an off-line Flyback converter. By adding an extra winding which is magnetically coupled to the Flyback transformer and electrically coupled to the VF, higher Power Factor (PF) and lower Total Harmonic Distortion (THD) can be achieved. The proposed circuit uses a high frequency inductor, low voltage capacitors t...

A novel high step-up dc–dc converter for fuel cell energy conversion is presented in this paper. The proposed converter utilizes a multiwinding coupled inductor and a voltage doubler to achieve high step-up voltage gain. The voltage on the active switch is clamped, and the energy stored in the leakage inductor is recycled. Therefore, the voltage stress on the active switch is reduced, and the c...

In this paper, an improved design of a high-Q factor CMOS active inductor operating in the mid MHz frequency range is introduced. Analysis of equations has been used to gain insight into behavior of the active inductor. Moreover, based on these equations and their analysis, ways of improving quality factor are discussed. Performance improvement based on this new design coupled with use of feedb...

The DC-DC converter topologies have received increasing attention in recent years for high power and high performance applications. The advantages of DC-DC boost converters include increased efficiency, reduced size, reduced electromagnetic emission, faster transient response, and improved reliability. The front end inductors in a boost converter are magnetically coupled to improve electrical p...

High-efficiency Step-Up Converter by using PV system with Reduced Diode Stresses sharing is proposed in this paper. Through employ of coupled inductor and switched capacitor, the proposed converters attain high step-up conversion ratio without operating at extreme duty ratio. Due to reutilize of leakage energy, the efficiency is developed and the large voltage spike on switch is improved, This ...

This paper hearsay a unique cross-coupled current conveyor based cmos transimpedance amplifier with series inductive peaking design to achieve an input capacitive load insensitive, low noise and augment the bandwidth of transimpedance amplifier. The peaking inductor is in series with the capacitor constituting a dominant pole. It boosts the band width of the amplifier.The whole transimpedance a...