Title :
Design of a low EMI boost converter using bi-frequency PFM control mode
Author :
Cheng´en Wu ; Changyuan Chang ; Yan Zhang ; Junjie Hu ; Yao Chen
Author_Institution :
Sch. of Integrated Circuit, Southeast Univ., Nanjing, China
Abstract :
A bi-frequency PFM controlled boost DC-DC converter is designed and implemented in this paper to improve the electro-magnetic interference (EMI) and efficiency of the system in a wide load range. The spectral energy of proposed bi-frequency PFM controlled converter is distributed to more frequency points to decrease the discrete harmonic peak, achieving low EMI. A control IC for the boost converter has been fabricated in Founder Microelectronics 0.5μm CMOS process. Experimental results show that the full-load conversion efficiency is over 80%, and the converter has fine EMI characteristics.
Keywords :
DC-DC power convertors; electromagnetic interference; pulse frequency modulation; CMOS process; EMI; Founder Microelectronics; bifrequency PFM control mode; boost DC-DC converter; control IC; discrete harmonic peak; electro-magnetic interference; full-load conversion efficiency; low EMI boost converter; spectral energy; DC-DC power converters; Electromagnetic interference; Frequency control; Frequency conversion; Frequency modulation; Pulse width modulation; Voltage control; EMI; bi-frequency modulation; boost dc-dc converter; dual-oscillator;
Conference_Titel :
Next-Generation Electronics (ISNE), 2015 International Symposium on
Conference_Location :
Taipei
DOI :
10.1109/ISNE.2015.7131966
