TY - GEN
T1 - Optimizing the efficiency of DC-DC converters with an analog variable-frequency controller
AU - Liu, Jia Ming
AU - Yu, Chun Jen
AU - Kuo, Yeong Chau
AU - Kuo, Tai Haur
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Maintaining high-efficiency through wide load ranges is important for switching DC-DC converter designs. By appropriately varying the switching frequencies with various load currents, the power-efficiency can be improved. The optimal relationship of switching frequencies versus load currents can be obtained by evaluating the power-loss models of switching converters. In this paper, a variable-frequency controller (VFC) circuit which can realize the optimal relationship is proposed. The VFC circuit can easily accommodate with various switching converters. A switching DC-DC buck converter with the proposed VFC circuit is designed. Compared to existing converters, variable-frequency control can be achieved with lower cost and lower controller power-loss by employing the novel VFC circuit.
AB - Maintaining high-efficiency through wide load ranges is important for switching DC-DC converter designs. By appropriately varying the switching frequencies with various load currents, the power-efficiency can be improved. The optimal relationship of switching frequencies versus load currents can be obtained by evaluating the power-loss models of switching converters. In this paper, a variable-frequency controller (VFC) circuit which can realize the optimal relationship is proposed. The VFC circuit can easily accommodate with various switching converters. A switching DC-DC buck converter with the proposed VFC circuit is designed. Compared to existing converters, variable-frequency control can be achieved with lower cost and lower controller power-loss by employing the novel VFC circuit.
UR - http://www.scopus.com/inward/record.url?scp=62949148860&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=62949148860&partnerID=8YFLogxK
U2 - 10.1109/APCCAS.2008.4746171
DO - 10.1109/APCCAS.2008.4746171
M3 - Conference contribution
AN - SCOPUS:62949148860
SN - 9781424423422
T3 - IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS
SP - 910
EP - 913
BT - Proceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
T2 - APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
Y2 - 30 November 2008 through 3 December 2008
ER -