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公开(公告)号：US11973431B2
公开(公告)日：2024-04-30
申请号：US17715090
申请日：2022-04-07
发明人： Eunsuk Lee , Kyusam Choi , Jaekuk Yu , Shinji Aso , Mitsutomo Yoshinaga , Hanju Kang
CPC分类号： H02M3/33592 , H02M3/33571 , H02M1/08
摘要： A detector compares a drain voltage with a first threshold voltage and outputs a first detection signal. An ON-counter detects a period of time during which current flows in a switching circuit based on the first detection signal, counts the period of time based on a predetermined clock cycle, and outputs an ON-count value. A first comparator receives the ON-count value and an ON-threshold value and outputs a first comparison signal when the ON-count value and the ON-threshold value match. A second comparator receives the ON-count value and a decreased ON threshold value, compares the ON-count value and the decreased ON-threshold value, and outputs a second comparison signal. An ON-mask time adjuster receives the second comparison signal and outputs an ON-threshold value for adjusting a mask time and a decreased ON-threshold value that is less than the ON threshold value.
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2.发明授权公开(公告)号：US12126267B2
公开(公告)日：2024-10-22
申请号：US17715081
申请日：2022-04-07
发明人： Eunsuk Lee , Jungyul Kim , Masaaki Shimada , Shinji Aso , Mitsutomo Yoshinaga , Hanju Kang
CPC分类号： H02M3/33592 , H02M1/0012 , H02M3/33571
摘要： A detector compares a drain voltage with a first threshold voltage and outputs a first detection signal. An ON counter detects a period of time during which a current flows in a switching, counts the period of time based on a predetermined clock cycle. An OFF counter detects a period of time during which a current flow through the body diode in a state where no current flows in the switching circuit, counts the period of time. An off-time setting circuit sets the time to turn off the switching circuit. A first comparison circuit compares the cycle count value with turn off time. A second comparison circuit compares a cycle count value output by the ON counter with a comparison result output by the first comparison circuit and outputs a signal to stop transmitting a PWM signal.
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公开(公告)号：US12003180B2
公开(公告)日：2024-06-04
申请号：US17486974
申请日：2021-09-28
发明人： Masaru Nakamura , Shinji Aso , Jianao Yao
CPC分类号： H02M3/1588 , H02M3/1557
摘要： A DC-DC converter according to one or more embodiments is disclosed that may include: a drive voltage switching circuit of a drive circuit that drives a synchronous rectification MOS transistor. The drive voltage switching circuit may switch a connection so that the drive circuit supplies power from the output voltage to the drive circuit in response to the drive voltage for supplying power to the drive circuit being set to be lower than the output voltage. The drive voltage switching circuit may switch a connection so that the drive circuit supplies power from the drive voltage in response to the drive voltage for supplying power to the drive circuit being set to be higher than the output voltage.
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