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公开(公告)号：US10658933B2
公开(公告)日：2020-05-19
申请号：US15668980
申请日：2017-08-04
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Sangcheol Moon , Jintae Kim , Hangseok Choi
Abstract: According to an implementation, a resonant converter for short-circuit protection includes an oscillator, a short-circuit detector configured to detect a short-circuit condition in a component of the resonant converter, and a pulse width modulation (PWM) controller configured to control the oscillator in a PWM mode before short-circuit protection is triggered. The oscillator, when in the PWM mode, is configured to generate a first clock signal for driving a first power switch and a second clock signal for driving a second power switch.
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公开(公告)号：US10193455B2
公开(公告)日：2019-01-29
申请号：US15668975
申请日：2017-08-04
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Sangcheol Moon , Jintae Kim , Hangseok Choi
Abstract: According to an implementation, a resonant converter for resonant capacitance stabilization during start-up includes an oscillator configured to generate a first clock signal to drive a first driver for a first power switch, and a second clock signal to drive a second driver for a second power switch during switching operations, and a resonant capacitor stabilizer configured to control the second driver to periodically activate the second power switch to discharge a resonant capacitor of a resonant network during initialization of the switching operations of the resonant converter.
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公开(公告)号：US09900938B2
公开(公告)日：2018-02-20
申请号：US15388243
申请日：2016-12-22
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Jintae Kim , Hyunchul Eum , Inki Park , Eungwoo Lee
CPC classification number: H05B33/0812 , H02J3/01 , H02J3/18 , H02M1/12 , Y02B20/345
Abstract: A light emitting diode (LED) lighting circuit includes a ripple reducer. The ripple reducer includes a ripple detector, an adaptive offset generator, and a linear regulator. The ripple detector generates a ripple voltage that is indicative of a ripple current. The adaptive offset generator generates an adaptive offset voltage from the ripple voltage and from a voltage of a transistor. The linear regulator drives the transistor to regulate an LED current in accordance with a reference control voltage that is generated from the ripple voltage and the adaptive offset voltage.
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公开(公告)号：US10693379B2
公开(公告)日：2020-06-23
申请号：US15668980
申请日：2017-08-04
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Sangcheol Moon , Jintae Kim , Hangseok Choi
Abstract: According to an implementation, a resonant converter for short-circuit protection includes an oscillator, a short-circuit detector configured to detect a short-circuit condition in a component of the resonant converter, and a pulse width modulation (PWM) controller configured to control the oscillator in a PWM mode before short-circuit protection is triggered. The oscillator, when in the PWM mode, is configured to generate a first clock signal for driving a first power switch and a second clock signal for driving a second power switch.
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Patent Agency Ranking
公开(公告)号：US10374516B2
公开(公告)日：2019-08-06
申请号：US15668974
申请日：2017-08-04
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Sangcheol Moon , Jintae Kim , Hangseok Choi
Abstract: According to an implementation, a resonant converter for detecting non-zero voltage switching includes an oscillator configured to generate a first clock signal to drive a first power switch, and a second clock signal to drive a second power switch. The resonant converter includes a non-zero voltage switching (non-ZVS) detection circuit configured to receive an integrated current sense signal sensed on a primary side of a transformer of a resonant network, and determine a polarity of a voltage of the integrated current sense signal at a predetermined point in the first clock signal or the second clock signal during a switching cycle. The non-ZVS detection circuit is configured to detect a non-ZVS event based on the polarity of the voltage of the integrated current sense signal at the predetermined point in the first clock signal or the second clock signal during the switching cycle.
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公开(公告)号：US10333416B2
公开(公告)日：2019-06-25
申请号：US15706928
申请日：2017-09-18
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Jintae Kim , Hangseok Choi , Taesung Kim , Sangcheol Moon
Abstract: A method for controlling a power converter includes determining whether a value of a feedback signal is in a first range, detecting a plurality of points of the feedback signal, and decreasing one or both of a proportional coefficient and an integral coefficient of a first control loop of the power converter at a first plurality of times corresponding to the detected plurality of points of the feedback signal when the value of the feedback signal is in the first range. The feedback signal indicates an output signal of the power converter. A circuit for controlling a power converter includes a transient detector that generates a transient detection signal in response to a feedback signal indicating an output signal of the power converter and a gain selector that generates a gain selection signal in response to the transient detection signal.
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公开(公告)号：US10186948B2
公开(公告)日：2019-01-22
申请号：US15668983
申请日：2017-08-04
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Sangcheol Moon , Jintae Kim , Hangseok Choi
Abstract: According to an implementation, a resonant converter for burst mode control includes an oscillator configured to control switching operations of at least one power switch, and a burst mode controller configured to control a burst mode by determining a start of a burst pulse of the burst mode using a first internal signal and determining an end of the burst pulse of the burst mode using a second internal signal. The burst mode controller is configured to stop the switching operations during the burst pulse.
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8.发明授权公开(公告)号：US10103618B2
公开(公告)日：2018-10-16
申请号：US15392964
申请日：2016-12-28
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Jintae Kim , Hangseok Choi , SangCheol Moon
Abstract: Provided is a power factor correction circuit including an inductor having one end to which an input voltage is applied; a power switch connected between another end of the inductor and the ground, and configured to control an output of the power factor correction circuit; and a power factor correction controller configured to calculate a duty of the power switch on the basis of an output detection voltage corresponding to the output and an inductor current flowing through the inductor, calculate conduction-period information regarding a conduction period in which the inductor current flows in one switching cycle of the power switch, and compensate the calculated duty on the basis of the conduction-period information.
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公开(公告)号：US09350257B2
公开(公告)日：2016-05-24
申请号：US14520410
申请日：2014-10-22
Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
Inventor： Gwanbon Koo , Dooyong Jung , Jintae Kim , Taesung Kim , Youngbae Park , Kyungseop Kim , Donghye Cho
CPC classification number: H02M3/33561 , H02J3/383 , H02M3/33553 , H02M2001/0048 , H02M2001/0077 , Y02B70/1491 , Y02E10/563
Abstract: A power supply apparatus and a driving method thereof are disclosed. The power supply apparatus includes a first converter and a second converter. The first converter is operated to acquire a first gain when an input voltage is included in a first range or a second range that is lower than a first range and outputs a first output voltage and a second output voltage by converting the input voltage. In addition, the second converter is operated when the input voltage is included in the first range and outputs a third output voltage by converting the second output voltage.
Abstract translation: 公开了电源装置及其驱动方法。 电源装置包括第一转换器和第二转换器。 当输入电压包括在低于第一范围的第一范围或第二范围内时，第一转换器被操作以获取第一增益，并且通过转换输入电压来输出第一输出电压和第二输出电压。 此外，当输入电压包括在第一范围内时，第二转换器工作，并通过转换第二输出电压输出第三输出电压。
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