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1.发明授权公开(公告)号：US11831243B2
公开(公告)日：2023-11-28
申请号：US17429358
申请日：2021-04-12
发明人： Yanbo Zou , Yulin Chen , Fada Du , Tao Zhang
CPC分类号： H02M3/33569 , H02M1/0009 , H02M3/33592 , H02M1/348 , H02M3/3353 , H02M3/33507 , Y02B70/10
摘要： The subject application provides a power converter with lossless current sensing capability. The power converter comprises: a transformer, a primary switch for conducting or blocking a current flowing in a primary winding of the transformer, a controller configured to generate a first control signal through a first control node to control the primary switch; and a current sensing circuit configured for sensing a current flowing in the primary winding. The current sensing circuit comprises a current sensing switch that is configured to be normally open and has a gate length smaller than a gate length of the primary switch. A relatively simple current sensing circuit is achieved and the overall power efficiency is improved.
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公开(公告)号：US11641165B2
公开(公告)日：2023-05-02
申请号：US17053757
申请日：2020-09-30
发明人： Tao Zhang , Jihua Li , Yulin Chen
摘要： The subject application provides a zero-voltage switching flyback converter comprising: a transformer having a primary winding and a secondary winding; a primary switch and a secondary switch for conducting the currents flowing in the primary winding and secondary winding respectively. A timing control method for operating the flyback converter are provided to accomplish zero-voltage switch by turning on the secondary switch twice within one switching power cycle.
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公开(公告)号：US11632051B2
公开(公告)日：2023-04-18
申请号：US17053756
申请日：2020-09-30
发明人： Tao Zhang , Jihua Li , Yulin Chen
摘要： The subject application provides a zero-voltage switching flyback converter comprising: a transformer having a primary winding and a secondary winding; a primary switch and a secondary switch for conducting the currents flowing in the primary winding and secondary winding respectively. A timing control method for operating the flyback converter are provided to accomplish zero-voltage switch by turning on the secondary switch twice within one switching power cycle.
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