-
公开(公告)号：US10110137B1
公开(公告)日：2018-10-23
申请号：US15486919
申请日：2017-04-13
发明人： Sangcheol Moon , Hangseok Choi , Chi Chen Chung , Cheng-Sung Chen
IPC分类号： H02M3/335
摘要： A Synchronous Rectifier (SR) controller circuit includes a dead time evaluation circuit, an offset voltage controller circuit, an off threshold control circuit, and a comparator circuit. The dead time evaluation circuit produces an indication of whether a measured dead time of an SR switching device is less than a target dead time. The offset voltage controller circuit determines an offset count using the indication, an offset voltage using the offset count, and high and low saturation indicators according to the offset count. The off threshold control circuit determines a threshold count using the high and low saturation indicators and an off threshold voltage using the threshold count. The comparator circuit determines whether a measured voltage of the SR switching device is greater than a virtual off threshold voltage, the virtual off threshold voltage corresponding to the off threshold voltage minus the offset voltage.
-
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.
-
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.
-
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.
-
公开(公告)号：US10608544B2
公开(公告)日：2020-03-31
申请号：US16135166
申请日：2018-09-19
发明人： Sangcheol Moon , Hangseok Choi , Chi Chen Chung , Cheng-Sung Chen
IPC分类号： H02M3/335
摘要： A Synchronous Rectifier (SR) controller circuit includes a dead time evaluation circuit, an offset voltage controller circuit, an off threshold control circuit, and a comparator circuit. The dead time evaluation circuit produces an indication of whether a measured dead time of an SR switching device is less than a target dead time. The offset voltage controller circuit determines an offset count using the indication, an offset voltage using the offset count, and high and low saturation indicators according to the offset count. The off threshold control circuit determines a threshold count using the high and low saturation indicators and an off threshold voltage using the threshold count. The comparator circuit determines whether a measured voltage of the SR switching device is greater than a virtual off threshold voltage, the virtual off threshold voltage corresponding to the off threshold voltage minus the offset voltage.
-
-
-
-
搜索结果
5 条记录 (耗时 0.015 秒)
