TY - JOUR
T1 - Metacapacitors
T2 - Printed thin film, flexible capacitors for power conversion applications
AU - Van Tassell, Barry
AU - Yang, Shyuan
AU - Le, Chengrui
AU - Huang, Limin
AU - Liu, Shuangyi
AU - Chando, Paul
AU - Liu, Xiaohua
AU - Byro, Andrew
AU - Gerber, Daniel L.
AU - Leland, Eli S.
AU - Sanders, Seth R.
AU - Kinget, Peter R.
AU - Kymissis, Ioannis
AU - Steingart, Daniel Artemus
AU - O'Brien, Stephen
PY - 2016/4
Y1 - 2016/4
N2 - The Metacapacitors project aims to improve efficiency, functionality and form factor of offline power converters suitable for LED solid-state lighting, with a view to developing an attractive technology platform for load management and power conversion across a broad range of applications. Based on integrated switched-capacitor (SC) topologies, the project adopts an integrated approach from materials to devices to circuits. We designed capacitors based on high-κ dielectric nanocrystals, that can be prepared using high-throughput microfabrication/ nanotechnology techniques, ink deposition and multilayering. The capacitor dielectric, a nanocomposite composed of (Ba, Sr)TiO3 nanocrystals in polyfurfuryl alcohol (BST/PFA, κ > 20, 100Hz-1 MHz, loss < 0.01, 20 kHz), targets a high volumetric capacitance density and ripple current capability. The Dielectric is demonstrated to function in a finished capacitor >1000 h at 125°C. The capacitors were board integrated with a custom hybrid-switched-capacitor-resonant dc-dc converter IC. The converter integrates a balanced SC front-end with a series resonant tank, enabling nearly lossless current regulation and tranformerless galvanic isolation. The converter IC can be stacked in the voltage domain to interface a range of inputs. The tested driver delivers about 15 Wat 470 mA to a string of 12 LEDs with 90% peak efficiency.
AB - The Metacapacitors project aims to improve efficiency, functionality and form factor of offline power converters suitable for LED solid-state lighting, with a view to developing an attractive technology platform for load management and power conversion across a broad range of applications. Based on integrated switched-capacitor (SC) topologies, the project adopts an integrated approach from materials to devices to circuits. We designed capacitors based on high-κ dielectric nanocrystals, that can be prepared using high-throughput microfabrication/ nanotechnology techniques, ink deposition and multilayering. The capacitor dielectric, a nanocomposite composed of (Ba, Sr)TiO3 nanocrystals in polyfurfuryl alcohol (BST/PFA, κ > 20, 100Hz-1 MHz, loss < 0.01, 20 kHz), targets a high volumetric capacitance density and ripple current capability. The Dielectric is demonstrated to function in a finished capacitor >1000 h at 125°C. The capacitors were board integrated with a custom hybrid-switched-capacitor-resonant dc-dc converter IC. The converter integrates a balanced SC front-end with a series resonant tank, enabling nearly lossless current regulation and tranformerless galvanic isolation. The converter IC can be stacked in the voltage domain to interface a range of inputs. The tested driver delivers about 15 Wat 470 mA to a string of 12 LEDs with 90% peak efficiency.
KW - Capacitors
KW - High frequency (HF)
KW - Integrated power converter
KW - Light-emitting diode (LED) driver
KW - Power conversion
KW - Printing
KW - PwrSoc
KW - Switched capacitor circuits
UR - http://www.scopus.com/inward/record.url?scp=84960193060&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84960193060&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2015.2448529
DO - 10.1109/TPEL.2015.2448529
M3 - Article
AN - SCOPUS:84960193060
VL - 31
SP - 2695
EP - 2708
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
IS - 4
M1 - 7130634
ER -