Abstract:
Car black boxes operate mostly in sleep mode, which requires high efficiency for light load. We propose two schemes to improve light load efficiency of the 3-level buck c...Show MoreNotes: As originally published there is an error in this document. The authors note that: "In figure 2, the greyed out diodes in parallel with Q3 and Q4 should be drawn as Schottky diodes and not Zener diodes" The article PDF remains as originally published.
Metadata
Abstract:
Car black boxes operate mostly in sleep mode, which requires high efficiency for light load. We propose two schemes to improve light load efficiency of the 3-level buck converter proposed by Reusch. The first scheme is to adopt constant ON-time control with DCM for light load. The second scheme is to shut down the gate drivers for the two bottom MOSFETs allowing Schottky diodes in parallel to conduct the inductor current, in the very light load condition. The proposed converter is prototyped using off-the-shelf components. The efficiency of the proposed 3-level buck converter ranges from 82% to 95% at 100 mW and 5 W, respectively.
Notes: As originally published there is an error in this document. The authors note that: "In figure 2, the greyed out diodes in parallel with Q3 and Q4 should be drawn as Schottky diodes and not Zener diodes" The article PDF remains as originally published.
Date of Conference: 20-24 September 2015
Date Added to IEEE Xplore: 29 October 2015
ISBN Information:
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