A High-Efficiency AC-to-DC Adaptor With a Low Standby Power Consumption
Yu-Kang Lo
Shang-Chin Yen
Chung-Yi Lin
Nat. Taiwan Univ. of Sci. & Technol., Taipei;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb. 2008
Volume: 55,
Issue: 2
On page(s): 963-965
ISSN: 0278-0046
INSPEC Accession Number: 9748412
Digital Object Identifier: 10.1109/TIE.2007.907673
Current Version Published: 2008-01-31
Abstract
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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