Voltage regulator

About: Voltage regulator is a research topic. Over the lifetime, 33536 publications have been published within this topic receiving 350859 citations.

Power generator having a power selector and organic light emitting display device using the same

Abstract: A power generator includes a booster that boosts an input voltage supplied from a power supply unit and that supplies a boosted input voltage to an output terminal, a selector that selects one of the input voltage and a voltage at the output terminal as a selected voltage and supplies the selected voltage as an output voltage, a reference voltage generator that generates a reference voltage based on the output voltage, a comparator that compares a feedback voltage supplied from the booster and the reference voltage with each other, and a controller that controls the booster to output a chosen voltage from the output terminal according to a comparison result of the comparator.

Full On-Chip CMOS Low-Dropout Voltage Regulator

Abstract: This paper proposes a solution to the present bulky external capacitor low-dropout (LDO) voltage regulators with an external capacitorless LDO architecture. The large external capacitor used in typical LDOs is removed allowing for greater power system integration for system-on-chip (SoC) applications. A compensation scheme is presented that provides both a fast transient response and full range alternating current (AC) stability from 0- to 50-mA load current even if the output load is as high as 100 pF. The 2.8-V capacitorless LDO voltage regulator with a power supply of 3 V was fabricated in a commercial 0.35-mum CMOS technology, consuming only 65 muA of ground current with a dropout voltage of 200 mV. Experimental results demonstrate that the proposed capacitorless LDO architecture overcomes the typical load transient and ac stability issues encountered in previous architectures.

Power distribution system design methodology and capacitor selection for modern CMOS technology

Abstract: Power systems for modern complementary metal-oxide-semiconductor (CMOS) technology are becoming harder to design. One design methodology is to identify a target impedance to be met across a broad frequency range and specify components to meet that impedance. The impedance versus frequency profiles of the power distribution system components including the voltage regulator module, bulk decoupling capacitors and high frequency ceramic capacitors are defined and reduced to simulation program with integrated circuit emphasis (SPICE) models. A sufficient number of capacitors are placed in parallel to meet the target impedance. Ceramic capacitor equivalent series resistance (ESR) and ESL are extremely important parameters in determining how many capacitors are required. SPICE models are then analyzed in the time domain to find the response to load transients.

Coordinated Control of Distributed Energy Storage System With Tap Changer Transformers for Voltage Rise Mitigation Under High Photovoltaic Penetration

Abstract: This paper proposes a coordinated control of distributed energy storage system (ESS) with traditional voltage regulators including the on-load tap changer transformers (OLTC) and step voltage regulators (SVR) to solve the voltage rise problem caused by the high photovoltaic (PV) penetration in the low-voltage distribution network. The main objective of this coordinated control is to relieve the tap changer transformer operation stress, shave the distribution network peak load and decrease the transmission and distribution resistive power losses under high solar power penetration. The proposed control method limits the energy storage depth of discharge in order to meet a more than ten-year cycle life. A benchmark distribution network model was developed in the Real Time Digital Simulator (RTDS) and the simulation results from the studied cases verified the proposed coordinated control strategy. The experimental implementation of proposed control algorithms were developed based on a power hardware-in-the-loop (PHIL) test bed with a 22 kWh ESS, a smart meter, Labview controller, and RTDS. The experimental results were consistent with those obtained from simulation study.

Method and system of regulating voltages

Abstract: Regulating voltages At least some of the illustrative embodiments are systems including a switching circuit configured to produce an intermediate voltage signal from an input voltage signal, and a first voltage regulator coupled the switching circuit and configured to produce a first regulated voltage signal from the intermediate voltage signal The switching circuit is configured to create the intermediate voltage signal based on a switching signal having a duty cycle, and wherein the duty cycle of the switching signal is open-loop with respect the intermediate voltage signal and the first regulated voltage signal