Christopher Schaef
Intel
46 Papers
262 Citations
Christopher Schaef is an academic researcher from Intel. The author has contributed to research in topics: Inductor & Switched capacitor. The author has an hindex of 14, co-authored 42 publications. Previous affiliations of Christopher Schaef include Dartmouth College & Helmut Schmidt University.
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Papers
A Scalable Active Battery Management System With Embedded Real-Time Electrochemical Impedance Spectroscopy
TL;DR: In this article, the authors present an efficient power converter based on a switched-inductor ladder topology, instrumentation and an embedded control platform that can provide both active balancing and real-time diagnostic capability through electrochemical impedance spectroscopy (EIS).
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Multimode Operation of Resonant and Hybrid Switched-Capacitor Topologies
TL;DR: The multimode approach is discussed as a tool to affect high efficiency and power density across a wide load range, provide variable regulation, and, as a general framework, to conceptualize the advantages and opportunities of the approach compared to more traditional dc–dc converters.
98
A 3-Phase Resonant Switched Capacitor Converter Delivering 7.7 W at 85% Efficiency Using 1.1 nH PCB Trace Inductors
TL;DR: This work presents a resonant switched capacitor (ReSC) topology that addresses some of these challenges by introducing a small amount of inductance in series with the flying capacitor, eliminating charge-sharing losses and thus allowing efficient operation in a low-cost process option.
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20.2 A variable-conversion-ratio 3-phase resonant switched capacitor converter with 85% efficiency at 0.91W/mm 2 using 1.1nH PCB-trace inductors
Christopher Schaef,Kapil Kesarwani,Jason T. Stauth +2 more
- 19 Mar 2015
TL;DR: Compared to more traditional buck and boost topologies, the SC approach provides better utilization of active and passive components, and is especially favorable when using submicron or deep-submicron CMOS technology because low-voltage devices can be configured in cascaded or hierarchical structures to interface across wide conversion ratios.
64
A Highly Integrated Series–Parallel Switched-Capacitor Converter With 12 V Input and Quasi-Resonant Voltage-Mode Regulation
TL;DR: Details of level shifting, gate driving, and bootstrapping for an all n-channel powertrain, including a precharge circuit, to facilitate safe startup are discussed in this paper.
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