Title :
Architecture and IC implementation of a digital VRM controller
Author :
Xiao, Jinwen ; Peterchev, Angel V. ; Sanders, Seth R.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper develops the architecture of a digital PWM controller for application in multi-phase voltage regulation modules (VRMs) with passive current sharing. In this context, passive current sharing and VRM transient response are analyzed. A scheme for sensing a combination of the VRM output voltage and output current with a single low-resolution windowed analog-to-digital converter (ADC) is proposed. The architecture and IC implementation of a digital PWM (DPWM) generation module, using a ring-oscillator-MUX scheme, is discussed. Experimental results from a prototype VRM and a partial controller IC implementation are presented
Keywords :
PWM power convertors; analogue-digital conversion; digital control; electric current measurement; electric sensing devices; field effect transistor switches; power MOSFET; power integrated circuits; power semiconductor switches; switching circuits; transient response; voltage control; voltage measurement; voltage regulators; IC implementation; VRM output current sensing; VRM output voltage sensing; VRM transient response; digital VRM controller architecture; multi-phase voltage regulation modules; passive current sharing; ring-oscillator-MUX scheme; single low-resolution windowed analog-to-digital converter; Analog-digital conversion; Computer architecture; Control systems; Costs; Digital control; Digital integrated circuits; Prototypes; Pulse width modulation; Transient response; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.953992
