Name
Title | ||
|---|---|---|
A Systematic USFG Design Approach for Integrated Reconfigurable Switched-Capacitor Power Converters |
Abstract | ||
|---|---|---|
A systematic design approach using signal flow graph (SFG) is presented in this paper, tailored for integrated reconfigurable switched-capacitor (SC) power converters. To achieve an optimal power stage, an unified signal flow graph (USFG) model is developed. System transfer function and I/O impedance can be evaluated based on it. To verify the design approach, the paper demonstrates a step-up/down reconfigurable SC power converter with five optional gain ratios. A dual-loop control scheme is employed to reconfigure the converter according to the instantaneous line/load conditions. A low-power, digital controller is designed in the subthreshold region for the feedback control loop. The converter was fabricated with a 130-nm CMOS process. Experimental results show that its output can be continuously regulated from 0.4 to 2.2 V, while allowing the input voltage to randomly vary between 0.9 and 1.5 V. The line regulation is maintained below 1.4%, with a lowest value of 0.07%. The maximum efficiency of 90.22% is measured at 0.55-V output voltage and 20-mW load. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/TCSI.2011.2151090 | IEEE Trans. on Circuits and Systems |
Keywords | Field | DocType |
optimal power stage,switched capacitor networks,cmos process,step-up/down reconfigurable sc power converter,cmos integrated circuits,power convertors,unified signal flow graph model,dynamic voltage scaling,transfer functions,signal flow graphs,integrated reconfigurable switched-capacitor power converters,subthreshold operation,circuit feedback,size 130 nm,low-power electronics,dual-loop control scheme,instantaneous line/load conditions,i/o impedance,unified signal flow graph,low-power digital controller,power 20 mw,feedback control loop,reconfigurable sc power converter,system transfer function,systematic usfg design,voltage 0.4 v to 2.2 v,line regulation,low power electronics,integrated circuit,systematics,transfer function,switches,digital controller,feedback control,signal flow graph,capacitors,switched capacitor | Dynamic voltage scaling,Control theory,Line regulation,CMOS,Switched capacitor,Electronic engineering,Subthreshold conduction,Digital control,Mathematics,Signal-flow graph,Low-power electronics | Journal |
Volume | Issue | ISSN |
58 | 11 | 1549-8328 |
Citations | PageRank | References |
0 | 0.34 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Chen Zheng | 1 | 0 | 0.68 |
| Ling Su | 2 | 0 | 0.34 |
| Dongsheng Ma | 3 | 157 | 24.75 |