Real-time programmable VR for power delivery efficiency enhancement

Author

Wei Shen ; Weixia Liang ; Hu, Herry

Author_Institution

Datacenter Eng. Group, Intel Corp., Shanghai, China

fYear

2015

fDate

15-21 March 2015

Firstpage

345

Lastpage

349

Abstract

The typical VR for server CPU or memory is multi-phase with constant switching frequency and drive voltage. This only provides the best VR efficiency in certain load ranges. In this paper, we will introduce a new VR technology. This technology attempts to enhance the VR power efficiency and reduce the power loss through programming the digital VR with different VR factors (phase counts, switching frequencies and drive voltages) when the CPU and memory load varies. The efficiency improvement and power savings of the new technology were tested on one server board. Using this methodology, over 7.2W of CPU VR power loss was saved when the board operates under certain load conditions.

Keywords

driver circuits; integrated memory circuits; power electronics; programmable circuits; real-time systems; voltage regulators; constant switching frequency; digital voltage regulator; drive voltages; memory load; phase counts; power delivery efficiency enhancement; power loss; power savings; real-time programmable voltage regulator; server CPU; server board; voltage regulator power efficiency; Drives; Loading; Memory management; Real-time systems; Registers; Servers; Switching frequency; VR; digital control; efficiency; voltage regulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility and Signal Integrity, 2015 IEEE Symposium on

Conference_Location

Santa Clara, CA

Print_ISBN

978-1-4799-1992-5

Type

conf

DOI

10.1109/EMCSI.2015.7107712

Filename

7107712