Fast transient response capacitorless DC-DC converter

Vidor, Dalton L. R.; Rigo, Nataniel; Rosa, Everton; Pinheiro, J.R.

doi:10.1109/cobep.2017.8257351

Cited by 3 publications

(1 citation statement)

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“…The goal is thus, to take advantage of the switching regulator and the linear regulator at the same time and to avoid their disadvantages in each case. The switching regulators provides steady-state current to the load, while the linear regulator provides higher-frequency transient compensation [3]. Because the linear regulator's transient response compensates the limited transient response of the switching regulator, output capacitance that is commonly required by conventional switching regulators is not needed [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Design of a Linear-Assisted Zeta Conveter

Martins

Radecker

Fracaro

et al. 2019

2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)

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Linear-assisted switching (PWM) converters have advantages over single switching topologies, mainly because of the reduction or elimination of bulky output capacitors and ultra-fast dynamical response. In this paper, a linear-assisted zeta converter is presented. The linear regulator circuit is composed by three bipolar transistors and an operational amplifier, which drives the transistor based on the error between the output voltage and its reference. The modeling of the whole circuit is presented, as well as a design example. The modeling of the zeta converter is similar to the conventional topology modeling, except the fact that the linear regulator current is considered as an extra state that substitutes the state regarding the output capacitor voltage. The zeta converter can be designed independently of the linear regulator circuit and simulations are used to validate the static operation of the overall topology. Experimental results confirm in practice the ripple compensation of the main zeta converter, where extra current is provided by the main converter, in order to drive the linear regulator that is responsible for the ripple compensation.

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Section: Introductionmentioning

confidence: 99%