Current Senseless AVP Method for Future VRM

Description:
A novel method to achieve Adaptive Voltage Positioning (AVP) without any current sensing scheme is proposed.  The accuracy of this method is better than the conventional MOSFET Rds sensing and inductor DCR sensing.  No current control loop is needed to actively set the output impedance so that the stringent load line defined by Intel microprocessors can be satisfied.  Furthermore, the proposed method enables high bandwidth control loop design that can reduce the decoupling capacitors.  Simulation results as well as experimental verifications are given.  This invented AVP method is very simple and accurate.  It is a very good candidate to be used in the field of low voltage high current application such as 12V voltage regulator for microprocessors.
  
Patent Information:
Title App Type Country Serial No. Patent No. File Date Issued Date Expire Date
Input Current Sensing AVP Method for Future VRM US Utility *United States 11/094,433 7,605,572 3/31/2005 10/20/2009 12/20/2025
Category(s):
Electrical
For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
lchen@vtip.org
Inventors:
Ming Xu
Fred Lee
Jinghai Zhou
Keywords:
Electronics
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