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公开(公告)号：US11641162B2
公开(公告)日：2023-05-02
申请号：US13859286
申请日：2013-04-09
发明人： Salvatore Giombanco
摘要： Circuits and methods for converting a current to an output voltage are disclosed herein. An embodiment of the circuit includes a first switch connected between a source of current and a first node and a second switch connected between the first node and a common voltage. The circuit also includes a first controller for controlling the state of the first switch and a second controller for controlling the state of the second switch. A capacitor is coupled to the first node; the voltage on the capacitor is the output voltage. When the second switch is open, the capacitor charges, and when the second switch is closed, the capacitor does not charge. The current flows through the primary inductance of a transformer.
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公开(公告)号：US11621630B2
公开(公告)日：2023-04-04
申请号：US17389018
申请日：2021-07-29
摘要： A switching converter controller includes: a control loop adapted to be coupled to an output terminal of a power stage; and a hybrid hysteretic control (HHC) circuit coupled to the control loop. The HHC circuit includes a resonant capacitor voltage (Vcr) node adapted to be coupled to a resonant capacitor (Cr) of the power stage, where the Vcr node sums a sense voltage for Cr with a frequency compensation ramp. The HHC circuit also includes a soft-start controller coupled to the Vcr node. The soft-start controller includes a clamp circuit coupled to the Vcr node.
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公开(公告)号：US20210257917A1
公开(公告)日：2021-08-19
申请号：US17308634
申请日：2021-05-05
摘要： 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：US11671006B2
公开(公告)日：2023-06-06
申请号：US17232974
申请日：2021-04-16
CPC分类号： H02M1/4225 , H02M1/0038 , H02M1/32
摘要： 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：US10756620B2
公开(公告)日：2020-08-25
申请号：US16525790
申请日：2019-07-30
发明人： Ananthakrishnan Viswanathan , Salvatore Giombanco , Joseph Michael Leisten , Philomena Cleopha Brady
摘要： A power factor correction circuit includes a power transistor, an inductor, and detection circuitry. The inductor is coupled to a drain terminal of the power transistor. The detection circuitry is coupled to the drain terminal of the power transistor. The detection circuitry is configured to determine an input voltage applied to the inductor based on resonant ringing of voltage at the drain terminal, and to detect a valley in the voltage at the drain terminal based on the input voltage applied to the inductor.
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公开(公告)号：US10673322B1
公开(公告)日：2020-06-02
申请号：US16544425
申请日：2019-08-19
摘要： A power factor correction controller zero current detection circuit includes a differentiator circuit, a comparator, a first qualification timer circuit, an idle ringing detector circuit, a second qualification timer circuit, and a flip-flop. The comparator is coupled to the differentiator circuit. The first qualification timer circuit includes an input coupled to an output of the comparator. The idle ringing detector circuit includes a first input coupled to the output of the comparator, and a second input coupled to an output of the first qualification timer circuit. The second qualification timer circuit includes a first input coupled to the output of the first qualification timer circuit, and a second input coupled an output of the idle ringing detector circuit. The flip-flop includes a first input coupled to the output of the comparator, and a second input coupled to an output of the second qualification timer circuit.
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7.发明授权公开(公告)号：US10218279B2
公开(公告)日：2019-02-26
申请号：US15334855
申请日：2016-10-26
摘要： Controllers and methods for controlling power supplies are disclosed herein. An example of a controller includes comparison circuitry operable to compare a switching frequency of the controller to a predetermined switching frequency. Voltage measuring circuitry is operable to measure the output voltage of the power supply. Circuitry is operable to disable at least one component in the power supply in response to the switching frequency being less than the predetermined switching frequency and the output voltage being greater than a predetermined output voltage.
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公开(公告)号：US20180191271A1
公开(公告)日：2018-07-05
申请号：US15395971
申请日：2016-12-30
CPC分类号： H02M7/4826 , H02M1/4241 , H02M3/07 , H02M3/33576 , H02M7/043 , H02M7/217 , H02M7/523 , H02M2001/0009 , H02M2001/0058 , H02M2007/4811 , H02M2007/4815 , H02M2007/4818 , Y02B70/1433 , Y02B70/1441 , Y02B70/1491
摘要： Embodiments includes systems, methods, and apparatuses for determining a resonant frequency of an LLC converter via a primary side of the LLC converter. In one embodiment, a circuit comprises an LLC converter and a resonant frequency determination unit, the resonant frequency determination unit configured to monitor electrical current on the primary side of the LLC converter, isolate a portion of the electrical current, determine, based on the portion of the electrical current, a crossing point, and determine, based on the crossing point, a resonant frequency of the LLC converter.
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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
CPC分类号： H02M3/33546 , H02M1/08 , H02M3/33592 , H02M2001/0009 , H02M2001/0035 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491 , Y02B70/16
摘要： 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：US09843322B2
公开(公告)日：2017-12-12
申请号：US15067928
申请日：2016-03-11
发明人： Yongxi Zhang , Sameer P. Pendharkar , Philip L. Hower , Salvatore Giombanco , Filippo Marino , Seetharaman Sridhar
IPC分类号： H03L5/00 , H03K17/687 , H01L27/092 , H01L29/06 , H03K19/0185
CPC分类号： H03K19/018521 , H01L21/823807 , H01L21/823814 , H01L27/092 , H01L29/0634 , H01L29/0696 , H01L29/1033 , H01L29/7816 , H01L29/7831 , H03K17/122
摘要： An integrated circuit chip includes a bimodal power N-P-Laterally Diffused Metal Oxide Semiconductor (LDMOS) device having an N-gate coupled to receive an input signal and a level shifter coupled to receive the input signal and to provide a control signal to a P-gate driver of the N-P-LDMOS device. A method of operating an N-P-LDMOS power device is also disclosed.
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