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公开(公告)号：US10826400B1
公开(公告)日：2020-11-03
申请号：US16669994
申请日：2019-10-31
发明人： Jihoon Jang , Jintae Kim , JooHoon Kim , Wontae Lee , KyungOun Jang
摘要： A controller includes a feedback sensing circuit that generates a feedback current during a first time interval in a switching period of a power converter based on an output voltage of the power converter and to generate a digital sensing signal indicative of a duration of the first time interval, and a feedback signal generator that determines a magnitude of the feedback current that flows during the first time interval based on a value of the digital sensing signal and to generate a digital feedback signal based on the determined magnitude of the feedback current. The controller adjusts the output voltage of the power converter in response to the digital feedback signal.
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公开(公告)号：US10164543B2
公开(公告)日：2018-12-25
申请号：US15486926
申请日：2017-04-13
发明人： Sangcheol Moon , Jintae Kim , Hangseok Choi
IPC分类号： H02M3/335
摘要： A method for controlling a power converter includes generating a load detection signal in response to a conduction signal and a driver input signal, and generating a gate control signal in response to the load detection signal. The gate control signal is delayed by a delay amount in response to the load detection signal. An apparatus for controlling a power converter includes a gate signal control circuit generating a load detection signal in response to a conduction signal and a driver input signal, and a synchronous rectifier (SR) driver generating a gate control signal in response to the load detection signal.
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公开(公告)号：US10992234B2
公开(公告)日：2021-04-27
申请号：US15877573
申请日：2018-01-23
发明人： Sangcheol Moon , Jintae Kim , Chi-Chen Chung , Cheng-Sung Chen
摘要： A circuit for controlling a power converter includes an SR switching device, a light load detection circuit generating a load detection signal in response to a conduction signal and an operation mode signal, and an SR driver generating a control signal having a value according to the load detection signal and provide the control signal to the SR switching device. A method of controlling a power converter includes generating a load detection signal in response to a conduction signal and an operation mode signal and generating a control signal having a value according to the load detection signal. The control signal has a first value when the load detection signal is asserted and has a second value when the load detection signal is de-asserted.
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4.发明授权公开(公告)号：US10826385B2
公开(公告)日：2020-11-03
申请号：US16128916
申请日：2018-09-12
发明人： Jintae Kim , Hangseok Choi , SangCheol Moon
摘要： 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：US10826376B1
公开(公告)日：2020-11-03
申请号：US16674505
申请日：2019-11-05
发明人： JooHoon Kim , Jintae Kim , Jihoon Jang
摘要： A method operates a switch controller of a power switch. The method includes determining a compensation value based on a quarter period of a resonant cycle of a drain voltage and a propagation delay time, the drain voltage being a voltage at a drain of the power switch, generating a sensing signal based on detection of a valley point of the drain voltage, and generating a control signal for controlling the power switch based on the sensing signal and the compensation value to turn on the power switch at a time corresponding to the valley point of the drain voltage.
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公开(公告)号：US10320285B2
公开(公告)日：2019-06-11
申请号：US16037267
申请日：2018-07-17
发明人： Jintae Kim , Sangcheol Moon
摘要： A control circuit for controlling a Switch-Mode Power Supply (SMPS) includes a current conduction duration determining circuit, an integrator circuit, a feedback circuit, a sawtooth generator circuit, and a gate control circuit. The current conduction duration determining circuit produces a duration signal according to a duration of a current of the SMPS. The integrator circuit produces an integrator output corresponding to an integral over time of a magnitude of the current. The feedback circuit produces a comparison voltage according to an output voltage of the SMPS. The sawtooth generator circuit produces a sawtooth signal using the comparison voltage and duration signal, such as by dividing the comparison voltage by the duration signal. The gate control circuit generates a gate signal for controlling a power switch of the SMPS according to a comparison of the sawtooth signal to the integrator output. The SMPS may be a Power Factor Correction circuit.
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公开(公告)号：US10483855B2
公开(公告)日：2019-11-19
申请号：US15670236
申请日：2017-08-07
发明人： SangCheol Moon , Hangseok Choi , Jintae Kim
摘要： A circuit comprises an Inductor-Inductor-Capacitor (LLC) tank circuit and an energizing circuit. The LLC tank circuit includes first and second inductors, a capacitor, and a primary coil of a transformer. The first inductor is coupled in series with the second inductor, the second inductor is coupled in series with the capacitor, and the primary coil is coupled in parallel with the second inductor. The energizing circuit supplies power to the LLC tank circuit according to a switching period, and detects a power limit condition according to a value of an integrated current sense signal and a duration of the switching period. The integrated current sense signal corresponds to an integration over time of a current supplied to the LLC tank circuit. The circuit may be incorporated into a power converter to provide power limit detection according to an accurate real-time estimation of the power converter's output power.
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