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公开(公告)号：US10177602B2
公开(公告)日：2019-01-08
申请号：US15037051
申请日：2015-01-08
Applicant: MediaTek Singapore Pte. Ltd.
Inventor： Hasnain Akram , Yung-Chih Yen , Patrick Stanley Riehl , Anand Satyamoorthy
IPC: H02M3/156 , H02J50/12 , H01F38/14 , H02J5/00 , H02J7/02 , H02M3/07 , H02M7/217 , H04B5/00 , G05F1/575 , G05F1/56 , H02M1/00 , H02M7/219
CPC classification number: H02J50/12 , G05F1/56 , G05F1/575 , H01F38/14 , H02J5/005 , H02J7/025 , H02M3/07 , H02M3/156 , H02M7/217 , H02M2001/0045 , H02M2007/2195 , H04B5/0037 , Y02B70/1408 , Y02B70/1425 , Y02B70/1441
Abstract: A synchronous rectifier using only n-channel devices in which the low-side switches are effectively cross-coupled using low-side comparators and the high-side switches perform an accurate zero-voltage-switching (ZVS) comparison. The charging path of each bootstrap domain is completed through the low-side switches, which are each always on for every half-cycle independent of loading. This scheme gives rectifier efficiency gain because a) each bootstrap domain receives maximum charging time, and b) the charging occurs through a switch rather than a diode. Both these factors ensure the bootstrap domain is fully charged, thereby reducing conduction losses through the rectifier switches. Furthermore, settings may be adjusted by software to optimize the resistive and capacitive losses of the rectifier. Using data for die temperature and operating frequency, software can create a feedback loop, dynamically adjusting rectifier settings in order to achieve the best possible efficiency.
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公开(公告)号：US20180358896A1
公开(公告)日：2018-12-13
申请号：US15695955
申请日：2017-09-05
Applicant: Lion Semiconductor Inc.
Inventor： Alberto Alessandro Angelo Puggelli , Thomas Li , Wonyoung Kim , John Crossley , Hanh-Phuc Le
CPC classification number: H02M3/07 , H02M3/157 , H02M3/158 , H02M3/1588 , H02M3/335 , H02M5/32 , H02M2001/0045 , H02M2001/007
Abstract: Circuits comprising: an inductor having a first side connected to VIN; a first switch having a first side connected to a second side of the inductor; a second switch having a first side connected to VIN; a first capacitor having a first side connected to a second side of the second switch; a third switch having a first side connected to a second side of the first switch; a fourth switch having a first side connected to a second side of the third switch; a fifth switch having a first side connected to a second side of the first capacitor and to a second side of the fourth switch, and having a second side coupled to a voltage source; and a second capacitor having a first side connected to the first side of the fourth switch, and having a second side connected to the second side of the fifth switch.
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公开(公告)号：US20180309952A1
公开(公告)日：2018-10-25
申请号：US15547803
申请日：2017-06-14
Inventor： Xuekun Yu , Wendong Li
CPC classification number: H04N5/63 , G02F1/1336 , G02F1/133602 , G02F2001/133612 , G09G3/36 , G09G3/3696 , G09G2330/021 , H02M3/33523 , H02M3/33561 , H02M7/217 , H02M2001/0032 , H02M2001/0045 , H04N5/44
Abstract: The present invention provides a TV power supply, which comprises a main power supply and a voltage conversion circuit electrically connected to the main power supply. The main power supply comprises a first output terminal for outputting a backlight driving voltage and a second output terminal for outputting a motherboard driving voltage. The voltage conversion circuit is configured to convert the backlight driving voltage or the motherboard driving voltage to a standby voltage. The voltage conversion circuit comprises an input terminal electrically connected to the first output terminal or the second output terminal and a third output terminal for outputting the standby voltage. The TV power supply can convert the backlight driving voltage or the motherboard driving voltage into the standby voltage through the voltage conversion circuit, and simultaneously generates the motherboard driving voltage, the backlight driving voltage and the standby voltage through a power supply, effectively reducing the number of the flyback power supply and reducing the TV power supply costs, and improving the cost competitiveness of the TV.
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公开(公告)号：US20180307257A1
公开(公告)日：2018-10-25
申请号：US16011260
申请日：2018-06-18
Applicant: Intel Corporation
Inventor： Kosta Luria , Alexander Lyakhov , Joseph Shor , Michael Zelikson
CPC classification number: G05F1/56 , G06F1/266 , H02M1/088 , H02M2001/0045
Abstract: Described is an apparatus which comprises: a first power supply node to supply input power supply; a power transistor coupled to the first power supply node; a multiplexer to selectively control gate terminal of the power transistor according to whether the power transistor is to operate as part of a low dropout voltage regulator (LDO-VR) or is to operate as a digital switch; and a second power supply node coupled to the power transistor, the second power supply node to provide power supply to a load from the power transistor.
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公开(公告)号：US20180287499A1
公开(公告)日：2018-10-04
申请号：US15903419
申请日：2018-02-23
Applicant: Konica Minolta Inc.
Inventor： Yuhei TATSUMOTO , Masayuki WATANABE , Makoto SHIMAZOE , Akihiro HAYASHI
CPC classification number: H02M3/1584 , H02M3/33507 , H02M7/1557 , H02M2001/0035 , H02M2001/0045 , H02M2003/1566 , Y02B70/16
Abstract: A power supply device includes: a power supply circuit that converts an AC voltage into a DC voltage; and a control circuit that controls the power supply circuit, wherein the power supply circuit includes: a rectifying and smoothing circuit that rectifies and smoothes the AC voltage; a first voltage converting circuit that converts the voltage and outputs a first DC voltage; a second voltage converting circuit that switches the first DC voltage by a switching circuit to output a second DC voltage; a feedback circuit that detects and feeds back an output voltage of the first voltage converting circuit; and a selection circuit that switches a reference voltage of the feedback circuit, and the control circuit sets the switching circuit to be in a continuous connection state when a normal mode is shifted to a power saving mode and gradually switches the reference voltage.
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Patent Agency Ranking
公开(公告)号：US20180188756A1
公开(公告)日：2018-07-05
申请号：US15904536
申请日：2018-02-26
Inventor： Yuan-Long Siao , Ku-Feng Lin , Kai-Chun Lin , Hung-Chang Yu , Chia-Fu Lee , Yue-Der Chih
CPC classification number: G05F1/575 , G05F1/461 , G05F1/563 , H02M3/07 , H02M2001/0045
Abstract: A low-dropout (LDO) regulator is provided. The LDO regulator comprises a first circuit operating as a closed loop control system. The first circuit is configured to control a voltage at a first node such that the voltage at the first node is substantially equal to a specified regulator output voltage. The LDO regulator comprises a second circuit operating as an open loop control system. The second circuit is configured to increase the voltage at the first node when a current flowing through a load changes from a first current to a second current. The first current is substantially equal to 0 amperes.
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公开(公告)号：US10014771B2
公开(公告)日：2018-07-03
申请号：US14559329
申请日：2014-12-03
Applicant: Astec International Limited
Inventor： Vijay Gangadhar Phadke
CPC classification number: H02M3/158 , H02M2001/0045
Abstract: A switching shunt regulator circuit includes a current source having an input for receiving an input voltage and an output for providing a DC current, and a shunt voltage regulator coupled to the output of the current source. The current source is configured to provide DC current to a DC load and DC current to the shunt voltage regulator when the DC load is coupled to the output. The DC current to the shunt voltage regulator regulates a voltage at the output. The shunt voltage regulator has a current carrying capacity greater than the sum of the DC current to the DC load and the DC current to the shunt voltage regulator.
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公开(公告)号：US20180172766A1
公开(公告)日：2018-06-21
申请号：US15579147
申请日：2016-06-03
Applicant: HYDRA-ELECTRIC COMPANY
Inventor： Robert Andrew Guziak
IPC: G01R31/327 , H01H9/54 , H03K17/30
CPC classification number: G01R31/327 , G01R27/205 , G01R31/3278 , H01H1/0015 , H01H9/167 , H01H9/542 , H01H35/24 , H01H2009/546 , H02M2001/0045 , H03K17/302 , H03K17/60
Abstract: A device, including: a sensor circuit that senses the state of contact impedance of a mechanical electrical switch; and a switch-off circuit that represents a sensed high impedance contact of the switch as a low or constant impedance, where the sensor circuit detects an open or closed condition of the switch by sensing a voltage across the switch passing a threshold value.
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公开(公告)号：US10003213B2
公开(公告)日：2018-06-19
申请号：US15403680
申请日：2017-01-11
Inventor： Jialiang Zhang
CPC classification number: H02J7/04 , H02H9/041 , H02J7/0029 , H02J2007/0039 , H02M1/32 , H02M7/04 , H02M7/217 , H02M2001/0045
Abstract: A power adapter includes an adapter main body configured to acquire an alternating current from a power source and convert the alternating current into a direct current having a specified voltage; an output port configured to acquire the direct current from the adapter main body, and supply the direct current to an external device via the positive output port and the negative output port; a current divider arranged between the positive output port and the negative output port, and configured to split the direct current from the adapter main body upon receiving a control signal, so as to cause a value of an output voltage output through the positive output port and the negative output port to be less than or equal to a preset value; and a processor configured to transmit the control signal to the current divider.
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公开(公告)号：US20180159476A1
公开(公告)日：2018-06-07
申请号：US15825036
申请日：2017-11-28
Applicant: SKYWORKS SOLUTIONS, INC.
Inventor： Florinel G. BALTEANU , Jose Alejandro MACEDO , Peter Harris Robert POPPLEWELL , Jakub F. PINGOT
CPC classification number: H03F1/0216 , H02M3/155 , H02M2001/0045 , H03F1/0222 , H03F1/0227 , H03F1/025 , H03F1/0255 , H03F1/0277 , H03F3/082 , H03F3/195 , H03F3/245 , H03F3/45071 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/111 , H03F2200/429 , H03F2200/504 , H03F2200/511 , H03F2200/555 , H03F2200/78 , H03F2203/7209 , H03F2203/7221 , H03F2203/7236
Abstract: Envelope tracking for radio-frequency applications. In some embodiments, a low frequency loss correction circuit can include a signal error detection circuit configured to produce an error signal in response to detecting one or more frequency components of a tracking signal below a cutoff frequency that are substantially attenuated through a capacitive path. The low frequency loss correction circuit can further include a drive circuit configured to convert the error signal into a low frequency correction signal, and provide the low frequency correction signal to a voltage supply line, the low frequency correction signal including at least some of the one or more frequency components of the tracking signal below a cutoff frequency that are substantially attenuated through the capacitive path.
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