Title :
Dual modulation technique for high efficiency in high switching buck converters over a wide load range
Author :
Tsai, Jen-Chieh ; Huang, Tsung-Ying ; Lai, Wang-Wei ; Chen, Ke-Horng
Author_Institution :
Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
May 30 2010-June 2 2010
Abstract :
The design of a compact size switching converter under high switching operation causes a drastically decreasing in power conversion efficiency. This paper presents a dual modulation technique to improve the power conversion efficiency with a little increase in output ripple. Especially, the trade-off between the output ripple and the efficiency can meet the requirement of the portable devices. Simulation results show that the converter can operate at 5 MHz with a supply voltage from 3V to 4.5V. The output voltage ripple can be kept smaller than 30mV when load current varies from 20mA to 800mA. Besides, the power efficiency is higher than 85% over a wide load current range.
Keywords :
modulation; power conversion; switching convertors; compact size switching buck converter design; current 20 mA to 800 mA; dual modulation technique; frequency 5 MHz; portable devices; power conversion efficiency; voltage 3 V to 4.5 V; voltage ripple; Buck converters; Circuits; Complexity theory; Costs; Power conversion; Pulse width modulation; Switching converters; Switching frequency; Switching loss; Voltage;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537750
