TY - JOUR
T1 - Design of a high efficiency and low EMI boost converter using bi-frequency PFM control scheme
AU - Chang, Changyuan
AU - Wu, Chengèn
AU - Yuan, Yubo
AU - Hu, Junjie
AU - Bian, Bin
N1 - Publisher Copyright:
© 2015, Springer Science+Business Media New York.
PY - 2015/8/8
Y1 - 2015/8/8
N2 - A bi-frequency PFM controlled boost DC–DC converter, combining the respective advantages of the conventional PWM and PFM, 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 and noise level. By detecting load changes, the proposed converter operates at a corresponding frequency at light load or heavy load and switches between the two frequencies at medium load to improve full-load efficiency. A control IC for the boost converter has been fabricated in Founder Microelectronics 0.5 μm CMOS process. The layout area is 800 × 640 µm2. Experimental results show that the full-load conversion efficiency is over 80 %, and the quiescent current is under 10 μA. Meanwhile, the converter has fine EMI characteristics.
AB - A bi-frequency PFM controlled boost DC–DC converter, combining the respective advantages of the conventional PWM and PFM, 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 and noise level. By detecting load changes, the proposed converter operates at a corresponding frequency at light load or heavy load and switches between the two frequencies at medium load to improve full-load efficiency. A control IC for the boost converter has been fabricated in Founder Microelectronics 0.5 μm CMOS process. The layout area is 800 × 640 µm2. Experimental results show that the full-load conversion efficiency is over 80 %, and the quiescent current is under 10 μA. Meanwhile, the converter has fine EMI characteristics.
KW - Bi-frequency modulation
KW - Boost DC–DC converter
KW - Dual-oscillator
KW - EMI
KW - Full load efficiency
UR - https://www.scopus.com/pages/publications/84945451326
U2 - 10.1007/s10470-015-0610-3
DO - 10.1007/s10470-015-0610-3
M3 - 文章
AN - SCOPUS:84945451326
SN - 0925-1030
VL - 85
SP - 473
EP - 480
JO - Analog Integrated Circuits and Signal Processing
JF - Analog Integrated Circuits and Signal Processing
IS - 3
ER -