標題: A Power Cloud System (PCS) for High Efficiency and Enhanced Transient Response in SoC
作者: Shih, Chun-Jen
Chu, Kuan-Yu
Lee, Yu-Huei
Chen, Wei-Chung
Luo, Hsin-Yu
Chen, Ke-Horng
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: Auxiliary power unit (APU);hybrid operation;power cloud system (PCS);power conversion efficiency;power module;system-on-chip (SoC);transient response
公開日期: 1-Mar-2013
摘要: Tradeoff between power efficiency and transient performance usually comes out during the design consideration of a power module. A configurable power supplying implementation named as the power cloud system (PCS) is proposed to handle different load conditions for simultaneously improving the power efficiency and the transient response in order to meet the system-on-chip (SoC) requirements. At heavy loads, the switching regulator takes over the energy delivery scheme in the PCS with the fast transient technique. An auxiliary power unit, which activates hybrid operation in both medium and light loads, can realize the low-dropout (LDO) regulator to provide a supplementary energy immediately in transient duration and be the high-side power switches of the switching regulator to minimize the power loss. Besides, owing to its low quiescent current of an LDO regulator, it can directly operate under the ultralight-load condition. Therefore, the satisfactory power conversion efficiency and the load transient response can be derived over a wide load range, which will certainly meet the power requirement for different operated functions in the SoC. The chip was fabricated by a 0.25-mu m CMOS process, and the experimental results show the improvements of 56% transient dip voltage and 25% transient recovery time in hybrid operation, as well as a peak efficiency of 94%.
URI: http://dx.doi.org/10.1109/TPEL.2012.2207917
http://hdl.handle.net/11536/21200
ISSN: 0885-8993
DOI: 10.1109/TPEL.2012.2207917
期刊: IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume: 28
Issue: 3
起始頁: 1320
結束頁: 1330
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