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公开(公告)号：US11031873B2
公开(公告)日：2021-06-08
申请号：US15396031
申请日：2016-12-30
Applicant: Texas Instruments Incorporated
Abstract: Embodiments include systems, methods, and apparatuses for controlling off-time during a burst mode in an LLC converter. In one embodiment, a circuit comprises an LLC converter having a primary side and a burst mode controller, the burst mode controller configured to monitor, on the primary side of the LLC converter, electrical current, and in response to a determination that the electrical current is below a first threshold, increase an off-time for switches in the LLC converter and in response to a determination that the electrical current is above a second threshold that is higher than the first threshold, decrease the off-time for the switches in the LLC converter.
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公开(公告)号：US11011975B2
公开(公告)日：2021-05-18
申请号：US16221419
申请日：2018-12-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Joseph Michael Leisten , Salvatore Giombanco , Filippo Marino , Rosario Davide Stracquadaini
Abstract: In an example, a system comprises a boost power factor correction (PFC) converter including a thermistor, an inductor, and a transistor coupled to a common node. The system also comprises a PFC controller coupled to the common node. The PFC controller includes a comparator coupled to a threshold voltage source and to a non-control terminal of the transistor; a first flip-flop coupled to the comparator and to a control terminal of the transistor; a zero current detector coupled to the inductor; a timer coupled to the comparator and to the zero current detector; a second flip-flop coupled to the timer and to the control terminal of the transistor; an AND gate coupled to the first and second flip-flops; a third flip-flop coupled to the second flip-flop and to the control terminal of the transistor; and a fourth flip-flop coupled to the AND gate and to the control terminal of the transistor.
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公开(公告)号：US11671006B2
公开(公告)日：2023-06-06
申请号：US17232974
申请日：2021-04-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Joseph Michael Leisten , Salvatore Giombanco , Filippo Marino , Rosario Davide Stracquadaini
CPC classification number: H02M1/4225 , H02M1/0038 , H02M1/32
Abstract: In an example, a system comprises a boost power factor correction (PFC) converter that includes a thermistor, an inductor, and a transistor and a PFC controller coupled to a common node. The PFC controller includes a comparator coupled to a threshold voltage source and to a terminal of the transistor. A first flip-flop is coupled to the comparator and to a control terminal of the transistor. A zero current detector is coupled to the inductor. A timer is coupled to the comparator and to the zero current detector. A second flip-flop is coupled to the timer and to the control terminal of the transistor. An AND gate is coupled to the first and second flip-flops. The circuit includes third and fourth flip flops.
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公开(公告)号：US20180191256A1
公开(公告)日：2018-07-05
申请号：US15396031
申请日：2016-12-30
Applicant: Texas Instruments Incorporated
CPC classification number: H02M3/33546 , H02M1/08 , H02M3/33592 , H02M2001/0009 , H02M2001/0035 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491 , Y02B70/16
Abstract: Embodiments include systems, methods, and apparatuses for controlling off-time during a burst mode in an LLC converter. In one embodiment, a circuit comprises an LLC converter having a primary side and a burst mode controller, the burst mode controller configured to monitor, on the primary side of the LLC converter, electrical current, and in response to a determination that the electrical current is below a first threshold, increase an off-time for switches in the LLC converter and in response to a determination that the electrical current is above a second threshold that is higher than the first threshold, decrease the off-time for the switches in the LLC converter.
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