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A 12-48V wide-vin 9-15MHz soft-switching controlled resonant DCDC converter

  • The presented wide-Vin step-down converter introduces a parallel-resonant converter (PRC), comprising an integrated 5-bit capacitor array and a 300 nH resonant coil, placed in parallel to a conventional buck converter. Unlike conventional resonant concepts, the implemented soft-switching control eliminates input voltage dependent losses over a wide operating range. This ensures high efficiency across a wide range of Vin= 12-48V, 100-500mA load and 5V output at up to 15MHz switching frequency. The peak efficiency of the converter is 76.3 %. Thanks to the low output current ripple, the output capacitor can be as small as 50 nF, while the inductor tolerates a larger ESR, resulting in small component size. The proposed PRC architecture is also suitable for future power electronics applications using fast-switching GaN devices.

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Author of HS ReutlingenWittmann, Jürgen; Funk, Tobias; Wicht, Bernhard
Erschienen in:ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference : 11-14 Sept. 2017
Place of publication:Piscataway, NJ
Document Type:Conference proceeding
Publication year:2017
Page Number:4
First Page:348
Last Page:351
DDC classes:620 Ingenieurwissenschaften und Maschinenbau
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt