Comparative evaluation of buck and hybrid buck DC-DC converters for automotive applications

Many applications require a high step-down ratio in DC-DC converters. Hybrid structures, using switched-capacitors and/or switched-inductors, have been reported as an alternative to high frequency transformer converters. The object of this paper is a comparative study of a switched-capacitor hybrid...

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Bibliographic Details
Main Authors: Muntean, N., Cornea, O., Pelan, O., Lascu, C.
Format: Conference Proceeding
Language:English
Subjects:
automotive applications
Capacitors
circuit topology
DC-DC power converters
Equations
Inductors
Mathematical model
Switches
Topology
Transistors
Online Access:Request full text
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Summary:Many applications require a high step-down ratio in DC-DC converters. Hybrid structures, using switched-capacitors and/or switched-inductors, have been reported as an alternative to high frequency transformer converters. The object of this paper is a comparative study of a switched-capacitor hybrid buck DC-DC converter (HBDC) and a classical buck DC-DC converter (BDC) for automotive applications. The hybrid converter uses a bank of switched capacitors in order to halve the input voltage available to the regular buck converter. Analytical aspects and digital simulations, validated through experimental results obtained from a full scale, 1kW rated power prototype, are presented for this purpose.
DOI:10.1109/EPEPEMC.2012.6397272