The synchronous buck circuit is in widespread use to provide “point of use” high current, low voltage power for CPU’s, chipsets, peripherals etc. In the synchronous buck converter, the power stage has a “high-side” (Q1 below) MOSFET to charge the inductor, and a “Low-side” MOSFET which replaces a conventional buck regulator’s “catch diode” to provide a low-loss recirculation path for the induct...

Previous vehicle-to-pedestrian simulations and experiments using pedestrian dummies and cadavers have shown that factors such as vehicle shape, pedestrian anthropometry and pre-impact conditions influence pedestrian kinematics and injury mechanisms. Generic pedestrian bucks, that approximate the geometrical and stiffness properties of current vehicles, would be useful in studying the influence ...

The synchronous buck circuit is in widespread use to provide “point of use” high current, low voltage power for CPU’s, chipsets, peripherals etc. In the synchronous buck converter, the power stage has a “high-side” (Q1 below) MOSFET to charge the inductor, and a “Low-side” MOSFET which replaces a conventional buck regulator’s “catch diode” to provide a low-loss recirculation path for the induct...

– A buck converter controlled by naturally-sampled constant frequency pulsewidth modulation in continuous mode of operation is analysed. For a fixed set of converter parameters and varying the dc supply voltage only the buck converter can be driven into chaos through a process of period doublings. A good agreement between simulation and experiments is obtained. Key-words: buck converter , ident...

1 This work is supported by Philips Research, Briarcliff Manor, NY, through Colorado Power Electronics Center Abstract – Single-switch step-up/step-down converters, such as the buck-boost, SEPIC and Cuk, have relatively high voltage and current stresses on components compared to the buck or the boost converter. A buck-boost converter with two independently controlled switches can work as a boos...

This paper presents an integrated power factor correction (PFC) buck-boost buck converter based voltage source inverter (VSI) fed brushless DC motor (BLDC) drive using a single voltage sensor. The speed is controlled by controlling the DC bus voltage of the VSI. An electronic commutation of the BLDC motor is used which utilizes a fundamental frequency switching (FFS) of VSI which in-turn offers...

In power conversion of photovoltaic (PV) energy, a hard-switching buck converter always generates some disadvantages. For example, serious electromagnetic interference (EMI), high switching losses, and stresses on an active switch (metal-oxide-semiconductor-field-effect-transistor, MOSFET), and high reverse-recovery losses of a freewheeling diode result in low conversion efficiency. To release ...

BAWA, GAURAV. Switched-Capacitor Filter Based Type-III Compensation for VoltageMode Control of Switched-Mode Buck Converters. (Under the direction of Dr. Alex Q. Huang). In this dissertation, we propose a novel technique for the voltage-mode control of switchedmode fixed-frequency Buck Converters using Switched-Capacitor Filters (SCF). The salient features of the analog sampled-data Type-III fi...

This paper analyzes and simulates the Li-ion battery charging process for a solar powered battery management system. The battery is charged using a non-inverting synchronous buck-boost DC/DC power converter. The system operates in buck, buck-boost, or boost mode, according to the supply voltage conditions from the solar panels. Rapid changes in atmospheric conditions or sunlight incident angle ...