Reduced switching loss favours Pulse Skipping Modulation mode of switching dc-to-dc converters at light loads. Under certain conditions the converter operates in discontinuous conduction mode (DCM). Inductor current starts from zero in each switching cycle as the switching frequency is constant and not adequately high. A DC-to-DC buck converter is modelled and simulated in this paper under DCM....

A single-stage LED driver based on interleaved buck-boost circuit and LLC resonant converter is proposed. The buck-boost circuit and LLC resonant converter are integrated by sharing switches, which can decrease the system cost and improve system efficiency. The input voltage of the buck-boost circuit is half of the rectified voltage, and two buckboost circuits are formed with the two half-bridg...

The reverse conduction mode of operation of the SiC trench JFET allows for diode-free synchronous rectification. This paper shows that the reverse conduction mode is an inherent property of the device caused by diffusion of electrons through the source fingers under conditions of moderate gate-drain diode forward bias. Experimental results confirm the expectations for a vertical-channel SiC JFE...

A novel bidirectional DC-DC converter is presented in this paper. The circuit configuration of the proposed converter is very simple. The proposed converter employs a coupled inductor with same winding turns in the primary and secondary sides. In step-up mode, the primary and secondary windings of the coupled inductor are operated in parallel-charge and series-discharge to achieve high step-up ...

This topic discusses the application of digital-control to DC/DC-switching converters and how to model the digitally controlled system. The main blocks that appear in almost every digital controller—the error ADC, the compensator, and the digital PWM engine—are discussed and used to model small-signal characteristics such as frequency response, stability criteria, the effects of quantization, a...

This paper presents an approach to improve dynamic responses of digitally controlled dc–dc converters using nonuniform analog-to-digital (A/D) quantization of the output voltage error. The nonuniform A/D quantizer parameters are selected to achieve improved step-load transient responses without compromising stability margins. The implementation, which includes a programmable A/D quantizer and a...

This letter presents a novel topology for a buck dc– dc converter with soft-switching capability, which operates under a zero-current-switching condition at turn on and a zero-voltage switching condition at turn off. In order to realize soft switching, based on a basic buck converter, the proposed converter added a small inductor, a diode, and an inductor coupled with the main inductor. Because...

This paper presents the functions of Series-Loaded Resonant Converter (SLRC). Series Loaded Resonant DC-DC converter is a type of soft-switching topology widely known for providing improved efficiency. Zero voltage switching (ZVS) buck converter is more preferable over hard switched buck converter for low power, high frequency DC-DC conversion applications. Zero Voltage switching techniques wil...