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公开(公告)号：US20240154518A1
公开(公告)日：2024-05-09
申请号：US18471765
申请日：2023-09-21
发明人： Rulong JIANG , Zhen ZHU , Xiaoru GAO , Zongyuan HE , Yanlei WEI , Shuaimin YAN , Yuqi PENG
CPC分类号： H02M1/08 , H02M1/0003 , H02M7/217
摘要： A control method and control circuit for a switched-mode power supply (SMPS) and a control chip are disclosed. The SMPS is switched between different operating modes based on different levels of its output voltage. When the output voltage is lower than a first reference and the difference between it and the first reference exceeds a threshold, an operating frequency of a power transistor and output voltage are controlled to satisfy a proportional relationship defined by an associated slope. When the output voltage is lower than the first reference and the difference between it and the first reference is below the threshold, the power transistor is controlled to operate at a fixed frequency. When the output voltage is higher than the first reference, the power transistor is controlled to operate at a variable frequency.
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公开(公告)号：US11979092B2
公开(公告)日：2024-05-07
申请号：US17904341
申请日：2020-06-05
发明人： Adriano Da Silva Dias , Marcio Sari
CPC分类号： H02M5/458 , H02M1/0009 , H02M1/08 , H02P27/06
摘要： A system for limiting charging current of capacitive filters of power cells of a cascaded modular power converter during the start-up period where a low-voltage power source is used, supplying a controlled power switching arrangement controlled by the general controller of the cascaded modular power converter, making it possible to limit the charging current of the capacitors of the power cells during the start-up period of the cascaded modular converter. The controlled power switching arrangement communicates with the general controller of the cascaded modular power converter over a communication channel. The communication means send the commands to start or end the start-up process of the cascaded modular converter.
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公开(公告)号：US11979082B2
公开(公告)日：2024-05-07
申请号：US17708045
申请日：2022-03-30
发明人： Connie Jiang
摘要： One example includes a power supply system. The system includes a power switch configured to activate via a control voltage responsive to a first state of an activation signal to conduct current from a power rail to a switching terminal. The system further includes a power switch deactivation driver configured to control an amplitude of the control voltage responsive to a second state of the activation signal based on a voltage difference between the power rail and the switching terminal to provide for a variable rate of deactivation of the power switch.
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64.发明公开公开(公告)号：US20240146203A1
公开(公告)日：2024-05-02
申请号：US18376795
申请日：2023-10-04
CPC分类号： H02M3/33576 , H02M1/08 , H05B45/37 , H02M1/009
摘要： Methods and apparatus for continuous conduction mode operation in multi-output power converters are described herein. During a switching cycle, secondary current may be delivered via a diode to a secondary output. Prior to beginning a subsequent switching cycle, a diverting current may be provided to a lower voltage secondary output on a parallel path. In this way diode current may be reduced to substantially zero prior to the subsequent switching cycle.
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公开(公告)号：US20240146196A1
公开(公告)日：2024-05-02
申请号：US18049836
申请日：2022-10-26
发明人： Michele Suraci , Giorgio Oddone , Paolo Selvo
CPC分类号： H02M3/1582 , H02M1/0009 , H02M1/08
摘要： An adaptive current limit circuit is provided in a power converter to achieve a fixed output current limit over duty cycle. In a converter including a high side switch, a low side switch coupled to the high side switch at a switch node, and an inductor coupled between an input voltage source and the switch node, the adaptive current limit circuit is coupled to receive the high side control signal and configured to generate an adaptive current limit threshold that varies based at least in part on the duty cycle of the high side switch.
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公开(公告)号：US20240146177A1
公开(公告)日：2024-05-02
申请号：US18050220
申请日：2022-10-27
发明人： Syed Wasif MEHDI , Stefan HERZER
CPC分类号： H02M1/08 , H02M1/0054 , H02M1/44
摘要： A gate driver circuit includes a charge pump circuit, a gate pull-up transistor, a resistor, and a capacitor. The charge pump circuit includes an output. The gate pull-up transistor includes a first current terminal, a second current terminal, and a control terminal. The first current terminal is coupled to the output of the charge pump circuit. The second current terminal is coupled to a gate drive output terminal. The resistor is coupled between the power input terminal and the control terminal. The capacitor is coupled between the control terminal and a ground terminal.
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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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公开(公告)号：US11973414B2
公开(公告)日：2024-04-30
申请号：US17159927
申请日：2021-01-27
发明人： Indra Prakash , Roger Franchino , Damir Klikic
CPC分类号： H02M1/08 , H02M7/003 , H02M7/537 , H05K1/0298 , H05K1/181 , H05K3/32 , H05K2201/09227 , H05K2201/10015 , H05K2201/10166 , H05K2201/10522
摘要： According to one aspect, embodiments of the invention provide an electrical-converter system comprising a printed circuit board including at least a first layer and a second layer, a switching node disposed on the second layer, a first transistor, a second transistor, a third transistor, and a fourth transistor disposed on the first layer, a first conduction path from a source of the first transistor, through the switching node, to a drain of the fourth transistor, the first conduction path having a first length, and a second conduction path from the source of the first transistor, through the switching node, to a drain of the second transistor, the second conduction path having a second length, wherein the first length of the first conduction path is greater than the second length of the second conduction path.
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69.发明授权公开(公告)号：US11973140B2
公开(公告)日：2024-04-30
申请号：US17569014
申请日：2022-01-05
发明人： Chiajen Wei , Leung Yu , Shuqi Wei
IPC分类号： H02M1/00 , H01L29/78 , H01L29/786 , H02M1/08 , H03K17/0812
CPC分类号： H01L29/7826 , H01L29/786 , H02M1/08 , H03K17/08122
摘要： It is provided a driving system, a driving method, a computer system and a computer readable medium. The driving system includes: an input circuit configured to receive an input on-chip voltage and output the on-chip voltage; an adjusting circuit configured to automatically detect a present amplitude of the on-chip voltage output by the input circuit and to output a bias voltage corresponding to the present amplitude of the on-chip voltage to a gate of the driven thin film transistor, wherein a source of the thin film transistor is directly or indirectly coupled to the on-chip voltage, and the bias voltage is lower than the on-chip voltage. The protection of the transistor gate and the adjusting of a receiver threshold voltage for different I/O (input/output) voltages and levels can be completed through automatic detection of the on-chip voltage and automatic adjusting.
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公开(公告)号：US20240128876A1
公开(公告)日：2024-04-18
申请号：US18335195
申请日：2023-06-15
发明人： Yu-Chang Chen , Ta-Yung Yang , Kun-Yu Lin , Fu-Ciao Syu , Chia-Hsien Yang , Hsin-Yi Wu
CPC分类号： H02M3/33507 , H02M1/083
摘要： A switching control circuit for use in controlling a resonant flyback power converter generates a first driving signal and a second driving signal. The first driving signal is configured to turn on the first transistor to generate a first current to magnetize a transformer and charge a resonant capacitor. The transformer and charge a resonant capacitor are connected in series. The second driving signal is configured to turn on the second transistor to generate a second current to discharge the resonant capacitor. During a power-on period of the resonant flyback power converter, the second driving signal includes a plurality of short-pulses configured to turn on the second transistor for discharging the resonant capacitor. A pulse-width of the short-pulses of the second driving signal is short to an extent that the second current does not exceed a current limit threshold.
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