Title :
Digital Pulse-Frequency/Pulse-Amplitude Modulator for Improving Efficiency of SMPS Operating Under Light Loads
Author :
Rahman, Nabeel ; Wang, Kun ; Prodic, Aleksandar
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont.
Abstract :
In this paper we show a novel digital control method for improving efficiency of SMPS operating at light loads and demonstrate its hardware implementation. In discontinuous conduction mode (DCM) it simultaneously performs a change of switching frequency and peak amplitude of the inductor current in order to achieve better efficiency than conventional pulse-frequency modulator solutions. Supporting analysis, simulations, and experimental results verify advantages of this control method
Keywords :
pulse amplitude modulation; pulse frequency modulation; switched mode power supplies; DCM; SMPS; digital control method; discontinuous conduction mode; hardware implementation; pulse-amplitude modulator; switching frequency; Amplitude modulation; Analytical models; Digital control; Digital modulation; Hardware; Inductors; Optical modulation; Pulse modulation; Switched-mode power supply; Switching frequency;
Conference_Titel :
Computers in Power Electronics, 2006. COMPEL '06. IEEE Workshops on
Conference_Location :
Troy, NY
Print_ISBN :
0-7803-9724-X
Electronic_ISBN :
1093-5142
DOI :
10.1109/COMPEL.2006.305667
