A High-Efficiency AC-to-DC Adaptor With a Low Standby Power Consumption
Yu-Kang Lo; Shang-Chin Yen; Chung-Yi Lin
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 2, Feb. 2008 Page(s):963 - 965
Digital Object Identifier   10.1109/TIE.2007.907673
Summary:A two-stage burst mode control scheme for an AC-to-DC adaptor is proposed in this paper. An upper limit for the output voltage is set to turn off both AC/DC and DC/DC controllers at no load. The burst-mode operations of the DC/DC and the AC/DC converters are in turn enabled when reaching the lower limit of the output voltage. Load analysis at standby mode is performed. A 50-mW no-load power loss is observed on an 80 W/12 V prototype adaptor.

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