公开(公告)号：US20090028235A1

公开(公告)日：2009-01-29

申请号：US12220768

申请日：2008-07-25

申请人： Young-Bae Park ,  Gwan-Bon Koo

发明人： Young-Bae Park ,  Gwan-Bon Koo

IPC分类号： H03K7/08

CPC分类号： H03K7/06

摘要： The present invention relates to a frequency modulation device and a switching mode power supply using the frequency modulation device. To prevent electromagnetic interference (EMI), it is required to slightly vary a switching operation frequency in an SMPS operation. In some embodiments, at least one first signal having a predetermined cycle is generated, a second signal corresponding to a level of a first signal is generated at a turn-off time of a switch, a first reference voltage having at least two different levels is generated according to the second signal, and an oscillator signal for increasing along a first slope during a first period and decreasing along a second slope during a second period between the first reference voltage and a second reference voltage having a level that is different from the first reference voltage is generated.

摘要翻译： 本发明涉及使用该调频装置的频率调制装置和开关模式电源。 为了防止电磁干扰（EMI），需要在SMPS操作中稍微改变开关操作频率。 在一些实施例中，产生具有预定周期的至少一个第一信号，在开关的关断时间产生对应于第一信号的电平的第二信号，具有至少两个不同电平的第一参考电压是 根据第二信号生成的振荡器信号，以及振荡器信号，用于在第一周期期间沿着第一斜率增加，并且在第一参考电压和第二参考电压之间的第二周期期间沿着第二斜率减小，该第二参考电压具有与第一 产生参考电压。

公开(公告)号：US20080180973A1

公开(公告)日：2008-07-31

申请号：US12011343

申请日：2008-01-25

申请人： Young-Bae Park ,  Gwan-Bon Koo

发明人： Young-Bae Park ,  Gwan-Bon Koo

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M3/33507

摘要： The present invention relates to a converter and a driving method thereof. The converter includes a main switch and a switching controller. The switching controller controls on/off of the main switch by using a first voltage corresponding to an output voltage and a first current flowing to the main switch. The switching controller determines a reference count according to the first voltage, and determines a peak value of the first current corresponding to a reference count and a switching frequency of the main switch.

摘要翻译： 本发明涉及一种转换器及其驱动方法。 转换器包括主开关和开关控制器。 开关控制器通过使用对应于输出电压的第一电压和流向主开关的第一电流来控制主开关的开/关。 开关控制器根据第一电压确定参考计数，并且确定与基准计数相对应的第一电流的峰值和主开关的开关频率。

公开(公告)号：USRE44228E1

公开(公告)日：2013-05-21

申请号：US13410228

申请日：2012-03-01

申请人： Young-Bae Park ,  Gwan-Bon Koo

发明人： Young-Bae Park ,  Gwan-Bon Koo

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M3/33523

摘要： A switching mode power supply includes a switching transistor, coupled to a primary coil at a primary side of a transformer for converting an input DC voltage, supplying power to a secondary and a tertiary coil at a secondary side of the transformer according to an operation of the switching transistor; a switching controller receiving a feedback voltage corresponding to a first voltage generated in the secondary coil and receiving a detection signal corresponding to a current of the switching transistor to generate a switching control signal for controlling the turn on/off of the switching transistor; and a feedback signal generator receiving the first voltage and the switching control signal to set a sampling period, and storing the first voltage, sampled with a last pulse of the first pulse string within the sampling period as a feedback voltage. The output voltage is thereby accurately detected without opto-couplers or shunt regulators.

摘要翻译： 开关电源包括开关晶体管，其耦合到变压器的初级侧的初级线圈，用于转换输入直流电压，根据变压器的次级侧向次级侧的次级侧和第三级线圈供电 开关晶体管; 接收与所述次级线圈中产生的第一电压相对应的反馈电压的开关控制器，并接收对应于所述开关晶体管的电流的检测信号，以产生用于控制所述开关晶体管的导通/截止的开关控制信号; 以及反馈信号发生器，接收第一电压和开关控制信号以设置采样周期，并且将在采样周期内的第一脉冲串的最后脉冲采样的第一电压存储为反馈电压。 因此，在没有光耦合器或分流稳压器的情况下，可以精确地检测输出电压。

公开(公告)号：US08115466B2

公开(公告)日：2012-02-14

申请号：US12220769

申请日：2008-07-25

申请人： Hang-Seok Choi ,  Young-Bae Park ,  Jae-Hwoan Chi ,  Gwan-Bon Koo

发明人： Hang-Seok Choi ,  Young-Bae Park ,  Jae-Hwoan Chi ,  Gwan-Bon Koo

IPC分类号： G05F1/40 ,  H02M3/335

CPC分类号： H02M3/33569

摘要： A converter is disclosed for using at least one switch to convert an input signal to a square wave signal, and using the square wave signal to generate an output voltage. The converter converts the square wave signal by a switching operation of a switch and generates the output voltage, and includes a switch controller for controlling the switching operation. The switch controller generates a first signal VCT having a first period that varies according to an output voltage, controls the switching operation of the switch by using the first signal, detects the output voltage, a first current Ids2 flowing through the switch, and a level of the first signal, and controls a burst mode according to the detection results.

摘要翻译： 公开了一种用于使用至少一个开关将输入信号转换成方波信号的A转换器，并且使用方波信号来产生输出电压。 转换器通过开关的开关操作来转换方波信号并产生输出电压，并且包括用于控制开关操作的开关控制器。 开关控制器产生具有根据输出电压变化的第一周期的第一信号VCT，通过使用第一信号来控制开关的开关操作，检测输出电压，流过开关的第一电流Ids2和电平 的第一信号，并根据检测结果控制突发模式。

公开(公告)号：US20080278131A1

公开(公告)日：2008-11-13

申请号：US12151903

申请日：2008-05-09

申请人： Young-Bae Park ,  Gwan-Bon Koo ,  Hang-Seok Choi

发明人： Young-Bae Park ,  Gwan-Bon Koo ,  Hang-Seok Choi

IPC分类号： G05F1/10

CPC分类号： H02M3/33515

摘要： A switching mode power supply includes: a power supply unit that comprises a switch that is coupled to a primary coil at a primary side of a transformer for converting an input DC voltage, and that supplies power to a secondary coil and a tertiary coil at a secondary side of the transformer according to an operation of the switch; a switching controller that receives a feedback voltage corresponding to a first voltage generated in the secondary coil at the secondary side of the transformer, and receives a detection signal corresponding to a current flowing to the switch to control an on/off operation of the switch; and a feedback signal generator that receives the first voltage and the switching control signal, samples the first voltage by using first pulse strings, and generates the feedback voltage according to a level of the first voltage sampled by a first pulse in the first pulse strings, wherein a toggling time of the first pulse strings is changed in a first period for sampling the first voltage, and a time for sampling the first voltage is changed.

摘要翻译： 开关模式电源包括：电源单元，其包括开关，该开关耦合到变压器的初级侧的初级线圈，用于转换输入的直流电压，并且在次级线圈和第三线圈上供电 变压器的二次侧根据开关的操作; 接收对应于在变压器的次级侧的次级线圈中产生的第一电压的反馈电压的开关控制器，并且接收对应于流向开关的电流的检测信号，以控制开关的接通/断开操作; 以及反馈信号发生器，其接收第一电压和开关控制信号，通过使用第一脉冲串对第一电压进行采样，并根据由第一脉冲串中的第一脉冲采样的第一电压的电平产生反馈电压， 其中第一脉冲串的切换时间在用于对第一电压进行采样的第一周期中改变，并且用于对第一电压进行采样的时间改变。

公开(公告)号：US20080019161A1

公开(公告)日：2008-01-24

申请号：US11827196

申请日：2007-07-11

申请人： J. Hoon Lee ,  Hang-Seok Choi ,  Gwan-Bon Koo

发明人： J. Hoon Lee ,  Hang-Seok Choi ,  Gwan-Bon Koo

IPC分类号： H02M7/04

CPC分类号： H02M1/44 ,  H02M3/33507

摘要： In one embodiment, a switching mode power supply (SMPS) includes a rectifier for generating an input DC voltage from an input AC voltage. A switching transistor, coupled to a primary coil of a transformer, converts the input DC voltage and supplies power to a secondary side of the transformer according to an operation of the switching transistor. A switching controller receives a feedback voltage corresponding to a voltage of the secondary side of the transformer, a sense signal corresponding to current flowing at the switching transistor, and a first signal corresponding to a voltage difference between first and second electrodes of the switching transistor. The switching controller controls the turning on and off of the switching transistor. After the switching transistor is turned off, the switching controller detects and counts a number of times that a voltage level of the first signal and a reference voltage are equal. The switching controller causes the switching transistor to turn-on when the count of the number of times reaches a variable reference number.

摘要翻译： 在一个实施例中，开关模式电源（SMPS）包括用于从输入AC电压产生输入DC电压的整流器。 耦合到变压器的初级线圈的开关晶体管根据开关晶体管的操作转换输入直流电压并将功率供应到变压器的次级侧。 开关控制器接收对应于变压器的次级侧的电压的反馈电压，对应于在开关晶体管流动的电流的感测信号，以及对应于开关晶体管的第一和第二电极之间的电压差的第一信号。 开关控制器控制开关晶体管的导通和截止。 在开关晶体管截止之后，开关控制器检测并计数第一信号和参考电压的电压电平相等的次数。 当数量的计数达到可变参考数时，开关控制器使开关晶体管导通。