Title :
Practical Implementation of a High-Frequency Current Sensing Technique for VRM
Author :
Simon-Muela, A. ; Petibon, S. ; Alonso, C. ; Estibals, B. ; Seguier, Lionel ; Chaptal, J.L.
Author_Institution :
Univ. Paul Sabatier, Toulouse
Abstract :
Inductor current tracking in high-frequency DC/DC converters is not effortless, especially when high current and low voltages loads are demanded. This paper proposes a simple technique to obtain a good resolution in the inductor current measurement obtaining an equivalent voltage image which can be used for a high-frequency PWM controller. This strategy of measurements is generic and it has been validated by simulations. Our experimental results are obtained with very low output voltages and several loads between 10mA to high currents covering the needs of portable and embedded VRM applications.
Keywords :
DC-DC power convertors; PWM power convertors; electric current measurement; inductors; voltage regulators; high-frequency DC-DC converters; high-frequency PWM controller; high-frequency current sensing; inductor current measurement; inductor current tracking; voltage regulator module; Current measurement; DC-DC power converters; Digital control; Inductors; Low voltage; Pulse width modulation; Resistors; Shunt (electrical); Switching frequency; Voltage control;
Conference_Titel :
Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on
Conference_Location :
Vigo
Print_ISBN :
978-1-4244-0754-5
Electronic_ISBN :
978-1-4244-0755-2
DOI :
10.1109/ISIE.2007.4374693
