This paper presents the design of a 20 MHzhysteresis-controlled CMOS buck converter using pseudo ramp techniques for ultra-low power applications. The proposed buck converter can improve the transient response using hysteresis-controlled and fixed-voltage band techniques. Using pseudo ramp technique, pseudo inductor current signal can be produced to reduce the output voltage ripple. At the same...

The field of soft conversion from one form to another has always been an area of continuous development. However, the recent developments are endorsed to exploring efficient means of single stage AC-AC conversion. Eliminating the energy loss involved in two stage AC-AC conversion has been the focal point for researchers these days. Thus, the present study is devoted to presents the most wanted ...

This paper proposes a novel soft-switching singlephase ac–dc–ac converter to give high input power factor and low current distortion on the rectifier side and provide clean and stable ac voltage on the inverter side. The proposed converter uses a new zero voltage switching (ZVS) strategy to get ZVS function. Besides operating at constant frequency, all semiconductor devices operate at soft-swit...

A technique has been developed to actively identify the open-loop characteristics of a DC-DC converter while the unit operates. A digital controller is used to perform both the closed-loop control of the converter and to periodically identify the “plant” using a pseudo-random digital signal. Experimental results are provided for a digitally controlled 90W forward converter to demonstrate accura...

This document describes several aspects relating to the design of dc-dc converters operating at frequencies in the VHF range (30-300 MHz). Design considerations are treated in the context of a dc-dc converter operating at a switching frequency of 100 MHz. Gate drive, rectifier and control designs are explored in detail, and experimental measurements of the complete converter are presented that ...

The series capacitor buck converter is a dc-dc converter topology that uniquely merges a switched capacitor circuit and a multiphase buck converter. Many of the challenges faced by conventional buck converters are overcome by this converter topology. This enables efficient, high frequency operation and significantly smaller solution size. The series capacitor buck converter has beneficial chara...

A monolithic CMOS voltage-mode, boost DC-DC converter with integrated power switches and on-chip pulse-width modulation (PWM) technique of switching control is presented in this paper. The PWM scheme used in this converter is constructed by a CMOS ring oscillator, whose duty is compensated by a pseudo hyperbola current generator to achieve almost constant frequency operation. The proposed boost...

The Matrix converter is a forced commutated Cyclo-converter with an array of controlled semi conductor switches that connects directly the three phase source to the three phase load. The matrix converter is a direct AC-AC Converter. It has no limit on output frequency due to the fact that it uses semiconductor switches with controlled turn-off capability. The simultaneous commutation of control...

The main purpose of this paper is to introduce an approach to design a DC-DC boost converter with constant output voltage for grid connected photovoltaic application system. The boost converter is designed to step up a fluctuating solar panel voltage to a higher constant DC voltage. It uses voltage feedback to keep the output voltage constant. To do so, a microcontroller is used as the heart of...

This paper presents a novel ac-dc power factor correction (PFC) power conversion architecture for single-phase grid interface. The proposed architecture has significant advantages for achieving high efficiency, good power factor, and converter miniaturization, especially in low-to-medium power applications. The architecture enables twice-line-frequency energy to be buffered at high voltage with...