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公开(公告)号：US20160352220A1
公开(公告)日：2016-12-01
申请号：US15166847
申请日：2016-05-27
发明人： Taesung KIM , Seunguk YANG , Youngbae PARK
IPC分类号： H02M3/07
摘要： Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.
摘要翻译： 信号计算器的示例包括电压倍增器和时分器。 电压倍增器复制对应于第一电压的时间信息，并且在对应于复制的时间信息的第一时段期间，使用对应于第二电压的第二电流来产生第三电压。 时分器根据将第一电流产生的电压与第一时间相对应的电压与对应于第二时间的第二电压进行比较的结果产生输出。
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公开(公告)号：US20170181236A1
公开(公告)日：2017-06-22
申请号：US15380254
申请日：2016-12-15
发明人： Minwoo LEE , Moonsik SONG , Seunguk YANG
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/083 , H05B33/0845 , Y02B20/346
摘要： A light emitting diode (LED) driving circuit disclosed herein controls a switching operation of a power switch connected to an LED string and includes a reference voltage generator configured to generate a frequency modulation reference voltage according to a dimming signal that controls brightness of the LED string, and a switching controller configured to control a switching frequency of the power switch to be constant when a level of the dimming signal is higher than that of the frequency modulation reference voltage, and control the switching frequency of the power switch based on the dimming signal when a level of the dimming signal is lower than that of the frequency modulation reference voltage.
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公开(公告)号：US20170354003A1
公开(公告)日：2017-12-07
申请号：US15601034
申请日：2017-05-22
发明人： Minwoo LEE , Moonsik SONG , Seunguk YANG
CPC分类号： H05B33/0815 , H05B33/083 , H05B33/0842 , H05B33/0851 , H05B37/02
摘要： A light emitting diode (LED) control circuit includes an inductor current sense circuit with a high-side diode string, a low-side diode string, and a sense resistor in series with and between the high-side and low side diode strings. The LED control circuit receives an input voltage on an end that connects to the high-side diode string. An end of the low-side diode string is connected to a switch through an inductor. A sense voltage developed on the sense resistor by an inductor current is sensed by a controller integrated circuit (IC). A pin of the controller IC that receives the sense voltage can have a breakdown voltage specification that is lower than the input voltage.
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公开(公告)号：US20170324404A1
公开(公告)日：2017-11-09
申请号：US15661690
申请日：2017-07-27
发明人： Taesung KIM , Seunguk YANG , Youngbae PARK
摘要： Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.
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公开(公告)号：US20180123580A1
公开(公告)日：2018-05-03
申请号：US15718338
申请日：2017-09-28
发明人： Taesung KIM , Seunguk YANG , Inki PARK
IPC分类号： H03K17/16 , H03K5/1532 , H03K17/60 , H02M3/335
CPC分类号： H03K17/16 , H02M3/33507 , H02M3/33523 , H02M2001/0009 , H03K5/1532 , H03K17/0822 , H03K17/60 , H03K17/6877 , H03K2217/0027
摘要： A power supply device includes a power switch that is switched according to a gate voltage. A sense resistor receives a switch current that flows through the power switch to develop a sense voltage. A peak of a primary-side current is detected from the sense voltage. The gate driver has a pair of switches for generating the gate voltage in
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公开(公告)号：US20180054865A1
公开(公告)日：2018-02-22
申请号：US15655025
申请日：2017-07-20
发明人： Seunguk YANG , Hyunchul EUM , Eungwoo LEE
IPC分类号： H05B33/08
CPC分类号： H05B33/0845 , H05B33/0812 , H05B33/0815 , H05B33/0818
摘要： A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a hybrid dimming signal from a dimming input circuit. The dimming input circuit receives pulse width modulation (PWM) dimming signals and generates the hybrid dimming signal as a PWM dimming signal, an analog dimming signal, or both depending on the received PWM dimming signals.
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公开(公告)号：US20180054864A1
公开(公告)日：2018-02-22
申请号：US15655010
申请日：2017-07-20
发明人： Seunguk YANG , Moonsik SONG , Hyunchul EUM
IPC分类号： H05B33/08
CPC分类号： H05B33/0845 , H05B33/0812 , H05B33/0815 , H05B33/0818 , Y02B20/347
摘要： A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a lighting controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a dimming signal. The controller IC generates a low reference threshold and a high reference threshold that follow the dimming signal. The lighting controller IC controls the transistor by hysteretic control by comparing a sense signal indicative of the current through the LED to the low reference threshold and the high reference threshold.
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8.发明申请公开(公告)号：US20170354004A1
公开(公告)日：2017-12-07
申请号：US15610706
申请日：2017-06-01
发明人： Inki PARK , Taesung KIM , Seunguk YANG
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0842 , H05B33/089
摘要： An LED control circuit controls a switching operation of a switch by hysteretic control. The LED control circuit includes a controller integrated circuit (IC) that senses a current sense voltage from a current sense resistor that is on a low-side of the switch. The LED control circuit senses the current sense voltage during on-time of the switch to determine when to turn off the switch. During off-time of the switch, the controller IC determines when to turn on the switch by comparing a sawtooth voltage to a turn-on threshold that is generated from the on-time of the switch.
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