专利内容由知识产权出版社提供
专利名称：POWER CONVERTER SYSTEM WITH
SYNCHRONOUS RECTIFIER OUTPUT STAGEAND REDUCED NO-LOAD POWERCONSUMPTION
发明人：Nicholas A. Sims,Jeffrey J. Terlizzi申请号：US14198507申请日：20140305
公开号：US20140185335A1公开日：20140703
专利附图：
摘要：A power converter circuit may convert alternating current signals into direct
current signals. A load may be powered from output terminals that are provided with thedirect current signals. The power converter circuit may have a transformer with primaryand secondary sides. A transistor on the primary side may be controlled using a pulsewidth modulation controller. A diode may be coupled in series with the secondary side ofthe transformer and the load. To improve efficiency at larger load currents, asynchronous rectifier control circuit may modulate a transistor on the secondary sidethat is coupled in parallel with the diode. The synchronous rectifier control circuit maymonitor voltage pulses on the transistor on the secondary side or may make direct loadcurrent measurements to ascertain how much load current is flowing. Under low or noload conditions, synchronous rectification can be inhibited to improve efficiency.
申请人：Apple Inc.
地址：Cupertino CA US
国籍：US
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