Title :
Sensorless current sharing in digitally controlled multiphase buck DC-DC converters
Author :
Du, Wei ; Tao, Yuanyuan ; Chen, Zhiyang ; Wang, Cong
Author_Institution :
Sch. of Mech. Electron. & Inf. Eng., China Univ. of Min. & Technol., Beijing, China
Abstract :
This paper describes a current sharing technique for digitally controlled multiphase buck DC-DC converters. The effective duty cycle mismatches and resistance mismatches are digitally compensated to achieve equal current sharing without sensing currents. Effects of various non-idealities on the current sharing performance are discussed. Experimental results are shown for a four-phase synchronous buck converter with 9V input voltage, and 1.5 V, 0-1.5A output.
Keywords :
DC-DC power convertors; digital control; electric current control; current 1.5 A; digital control; duty cycle mismatches; four-phase synchronous buck converter; multiphase buck DC-DC converters; resistance mismatches; sensorless current sharing; voltage 1.5 V; voltage 9 V; Estimation; Integrated circuit modeling; MOSFETs; Resistance; Sensors; Switches; Voltage control; DC-DC converter; current sharing technique; mismatch compensation;
Conference_Titel :
Electrical, Control and Computer Engineering (INECCE), 2011 International Conference on
Conference_Location :
Pahang
Print_ISBN :
978-1-61284-229-5
DOI :
10.1109/INECCE.2011.5953896
