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Control Concepts to Improve Light Load Efficiency - Optimal Number of Phases, Baby-Buck Channel, and Adaptive Bus Voltage Positioning
Case ID:
03.110
Web Published:
9/3/2012
Light load efficiency is as important as heavy load efficiency to switching power supplies. Optimizing light-load efficiency is often conflicting with optimizing heavy-load efficiency. To increase light-load efficiency without sacrificing heavy-load efficiency, the Optimal-Number-of-Phase (ONP) control concept is proposed to optimize multi-phase converter efficiency over a wide load range. The baby-buck concept can further increase light-load efficiency. The Adaptive-Bus-Voltage-Positioning (ABVP) concept can utilize the efficiency of the two-stage conversion system over a wide load range. These concepts are particularly useful in the laptop CPU Voltage Regulator (VR) application. With use of these concepts, the VR performance is improved significantly compared with the conventional solution.
Patent Information:
App Type
Country
Serial No.
Patent No.
File Date
Issued Date
Patent Status
US Utility
*United States
10/781,931
7,161,335
2/20/2004
1/9/2007
Abandoned
Category(s):
Electrical
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For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
lchen@vtip.org
Inventors:
Jia Wei
Ming Xu
Fred Lee
Keywords:
Electronics