Title :
Authentic mode-toggled detector with fast transient response under wide load range buck-boost converter
Author :
Lin, Man ; Yung-Sheng Huang ; Ehrhart, A. ; Yu-Huei Lee ; Chao-Chang Chiu ; Wicht, Baptiste ; Ke-Horng Chen
Author_Institution :
Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
An authentic mode-toggled detector (AMTD) technique is proposed to achieve load and line regulations in a proposed buck-boost (BB) converter. In the case of load transient, conventional BB converter will oscillate and cannot settle to a wellregulated output voltage owing to the on-resistance of the power MOSFETs. Accurate and expeditious mode-toggled detection in the BB converter meet the requirements of load and line transient response by means of the proposed adaptively near-immediate freezer (ANIF) technique. Besides, due to pulse frequency modulation (PFM) implemented in the proposed BB converter, ultra wide load range from 10mA to 900mA can have high efficiency from 80% to 95%. Simulation results show the proposed BB converter fabricated in VIS 0.25μm process can be wellregulated under the input voltage ranging from 2.7V to 4.2V.
Keywords :
load regulation; power MOSFET; power convertors; pulse frequency modulation; transient response; AMTD technique; ANIF technique; BB converter; PFM; VIS process; adaptively near-immediate freezer; authentic mode-toggled detector; buck-boost converter; line regulations; load regulations; load transient; power MOSFET; pulse frequency modulation; size 0.25 mum; transient response; voltage 2.7 V to 4.2 V; wide load range; Clocks; Detectors; Inductors; Pulse width modulation; Switches; Transient analysis; Transient response; Buck-Boost converter; DC-DC converter; authentic mode-toggled detector; fast load and line transient response;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572498
