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公开(公告)号：US20240291394A1
公开(公告)日：2024-08-29
申请号：US18175864
申请日：2023-02-28
申请人： Apple Inc.
发明人： Ashish K Sahoo , Brandon Pierquet , Jie Lu , Anish Prasai
CPC分类号： H02M7/219 , H02M1/08 , H02J2207/20
摘要： Operating a battery charger having an AC side stacked half bridge configuration coupled to a primary winding of a transformer and a DC side stacked half bridge configuration coupled to a secondary winding of the transformer to provide heating can include either operating the AC side stacked half bridges to provide a current path through the primary winding that does not include an AC source or operating the DC side stacked half bridges to provide a current path through the secondary winding that does not include a battery. In the former case, operation can include operating the DC side stacked half bridges to alternate between switching states that selectively couple a battery to the secondary winding of the transformer. In the latter case, operation can include operating the AC side stacked half bridges to alternate between switching states that selectively couple the AC source to the primary winding.
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公开(公告)号：US20240258902A1
公开(公告)日：2024-08-01
申请号：US18162177
申请日：2023-01-31
申请人： Apple Inc.
发明人： Jie Lu , Ashish K Sahoo , Brandon Pierquet , Anish Prasai
CPC分类号： H02M1/083 , H02M3/33573 , H02M7/219
摘要： A power conversion system can include at least one stacked half bridge converter that further includes a first half bridge further comprising two switching devices in a half bridge configuration and a first capacitor coupled thereacross and a second half bridge further comprising two switching devices in a half bridge configuration and a second capacitor coupled thereacross. The at least one stacked half bridge converter can be disposed between an input of the power conversion system and an output of the power conversion system. The power conversion system can further include a transformer coupled to the at least one stacked half bridge converter by a blocking capacitor and control circuitry that operates the switching devices of the at least one stacked half bridge converter as a switched capacitor converter using the blocking capacitor as a flying capacitor to equalize charge between the first and second capacitors.
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