公开(公告)号：US07684216B2

公开(公告)日：2010-03-23

申请号：US12079703

申请日：2008-03-28

Applicant: Hang-Seok Choi ,  Jin-Tae Kim ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Jin-Tae Kim ,  Jae-Hwoan Chi

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  Y02B70/1433

Abstract: A switching mode power supply (SMPS) and a driving method thereof are provided. The SMPS includes a power supply block that includes a first switch coupled to a first coil of a primary side of a transformer for converting an input voltage, wherein the power supply block supplies power to a second coil and a third coil of a secondary side of the transformer according to operation of the first switch; and a PWM signal generator determines a turn-on time of the first switch according to the input voltage, and the turn-on time is determined regardless of a power magnitude of an output terminal connected to the second coil. Accordingly, screen noise due to a ripple can be eliminated and stress on the switch breakdown due to excessive power input can be reduced to enable an SMPS with stable driving.

Abstract translation: 提供开关电源（SMPS）及其驱动方法。 SMPS包括电源块，其包括耦合到变压器的初级侧的第一线圈的第一开关，用于转换输入电压，其中电源模块向第二线圈和第二线圈的次级侧提供电力 变压器根据第一开关的动作; 并且PWM信号发生器根据输入电压确定第一开关的接通时间，并且确定接通时间，而不管连接到第二线圈的输出端子的功率幅度如何。 因此，可以消除由纹波引起的屏幕噪声，并且可以减少由于过大的功率输入引起的开关击穿的应力，从而能够使具有稳定驱动的SMPS。

公开(公告)号：US20090091955A1

公开(公告)日：2009-04-09

申请号：US12079703

申请日：2008-03-28

Applicant: Hang-Seok Choi ,  Jin-Tae Kim ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Jin-Tae Kim ,  Jae-Hwoan Chi

IPC: H02M5/45

CPC classification number: H02M3/33507 ,  Y02B70/1433

Abstract: A switching mode power supply (SMPS) and a driving method thereof are provided. The SMPS includes a power supply block that includes a first switch coupled to a first coil of a primary side of a transformer for converting an input voltage, wherein the power supply block supplies power to a second coil and a third coil of a secondary side of the transformer according to operation of the first switch; and a PWM signal generator determines a turn-on time of the first switch according to the input voltage, and the turn-on time is determined regardless of a power magnitude of an output terminal connected to the second coil. Accordingly, screen noise due to a ripple can be eliminated and stress on the switch breakdown due to excessive power input can be reduced to enable an SMPS with stable driving.

Abstract translation: 提供开关电源（SMPS）及其驱动方法。 SMPS包括电源块，其包括耦合到变压器的初级侧的第一线圈的第一开关，用于转换输入电压，其中电源模块向第二线圈和第二线圈的次级侧提供电力 变压器根据第一开关的动作; 并且PWM信号发生器根据输入电压确定第一开关的接通时间，并且确定接通时间，而不管连接到第二线圈的输出端子的功率幅度如何。 因此，可以消除由纹波引起的屏幕噪声，并且可以减少由于过大的功率输入引起的开关击穿的应力，从而能够使具有稳定驱动的SMPS。

公开(公告)号：US07957162B2

公开(公告)日：2011-06-07

申请号：US11888488

申请日：2007-08-01

Applicant: Hang-Seok Choi ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Jae-Hwoan Chi

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M2001/0032 ,  Y02B70/1433 ,  Y02B70/16

Abstract: The present invention relates to a switch mode power supply and a driving method for reducing switching loss and audible noise in the burst mode. The switch mode power supply includes a main switch, a power supply, an output unit, and a switch controller. The power supply includes a transformer having a primary coil connected to the main switch, and supplies power to a secondary coil of the transformer according to the operation of the main switch. The output unit is connected to the secondary coil of the transformer and outputs power supplied to the secondary coil of the transformer. The switch controller receives a feedback signal corresponding to the output voltage of the output unit, a sense signal corresponding to the current flowing to the main switch, and a sync signal corresponding to the voltage difference at the main switch, controls the on/off of the main switch, and determines whether to start the burst mode by using the feedback signal, and maintains the switching operation forcibly off period in the burst mode so that the reference frequency of burst switching may be less than a predetermined value.

Abstract translation: 本发明涉及用于在突发模式中减少开关损耗和可听噪声的开关模式电源和驱动方法。 开关模式电源包括主开关，电源，输出单元和开关控制器。 电源包括具有连接到主开关的初级线圈的变压器，并且根据主开关的操作向变压器的次级线圈供电。 输出单元连接到变压器的次级线圈，并输出提供给变压器次级线圈的电源。 开关控制器接收对应于输出单元的输出电压的反馈信号，对应于流向主开关的电流的感测信号和对应于主开关上的电压差的同步信号，控制开关 主开关，并且通过使用反馈信号来确定是否启动突发模式，并且在突发模式下强制关断周期的开关操作，使得突发切换的参考频率可能小于预定值。

公开(公告)号：US07791909B2

公开(公告)日：2010-09-07

申请号：US11818421

申请日：2007-06-13

Applicant: Gwan-Bon Koo ,  Hang-Seok Choi ,  Jae-Hwoan Chi

Inventor： Gwan-Bon Koo ,  Hang-Seok Choi ,  Jae-Hwoan Chi

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  Y02B70/1433

Abstract: The present invention relates to a quasi-resonant converter. In the quasi-resonant converter according to the present invention, a predetermined first period and a second period following to the first period are set. In the second period, a switch is turned on at a time point where voltages at both ends of the switch fall to the minimum if the second period includes the time point, and the switch is turned on at the end of the second period if the second period does not include the time point. Therefore, the switching frequency of the switch can be restricted within a predetermined range.

Abstract translation: 本发明涉及准谐振转换器。 在根据本发明的准谐振变换器中，设定第一期间之后的规定的第一期间和第二期间。 在第二时段中，如果第二周期包括时间点，则开关两端的电压下降到最小的时间点开关，并且在第二周期结束时开关接通 第二期不包括时间点。 因此，可以将开关的开关频率限制在预定范围内。

公开(公告)号：US08115466B2

公开(公告)日：2012-02-14

申请号：US12220769

申请日：2008-07-25

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

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

IPC: G05F1/40 ,  H02M3/335

CPC classification number: H02M3/33569

Abstract: 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.

Abstract translation: 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：US20080130324A1

公开(公告)日：2008-06-05

申请号：US11888488

申请日：2007-08-01

Applicant: Hang-Seok Choi ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Jae-Hwoan Chi

IPC: H02M3/335 ,  H02M7/04

CPC classification number: H02M3/33507 ,  H02M2001/0032 ,  Y02B70/1433 ,  Y02B70/16

Abstract: The present invention relates to a switch mode power supply and a driving method for reducing switching loss and audible noise in the burst mode. The switch mode power supply includes a main switch, a power supply, an output unit, and a switch controller. The power supply includes a transformer having a primary coil connected to the main switch, and supplies power to a secondary coil of the transformer according to the operation of the main switch. The output unit is connected to the secondary coil of the transformer and outputs power supplied to the secondary coil of the transformer. The switch controller receives a feedback signal corresponding to the output voltage of the output unit, a sense signal corresponding to the current flowing to the main switch, and a sync signal corresponding to the voltage difference at the main switch, controls the on/off of the main switch, and determines whether to start the burst mode by using the feedback signal, and maintains the switching operation forcibly off period in the burst mode so that the reference frequency of burst switching may be less than a predetermined value.

Abstract translation: 本发明涉及用于在突发模式中减少开关损耗和可听噪声的开关模式电源和驱动方法。 开关模式电源包括主开关，电源，输出单元和开关控制器。 电源包括具有连接到主开关的初级线圈的变压器，并且根据主开关的操作向变压器的次级线圈供电。 输出单元连接到变压器的次级线圈，并输出提供给变压器次级线圈的电源。 开关控制器接收对应于输出单元的输出电压的反馈信号，对应于流向主开关的电流的感测信号和对应于主开关上的电压差的同步信号，控制开关 主开关，并且通过使用反馈信号来确定是否启动突发模式，并且在突发模式下强制关断周期的开关操作，使得突发切换的参考频率可能小于预定值。

公开(公告)号：US20080049457A1

公开(公告)日：2008-02-28

申请号：US11879550

申请日：2007-07-18

Applicant: Hang-Seok Choi ,  Gwan-Bon Koo ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Gwan-Bon Koo ,  Jae-Hwoan Chi

IPC: H02M3/335

CPC classification number: H02M1/44 ,  H02M3/33523 ,  Y02B70/1433

Abstract: In one embodiment, an SMPS includes a rectifier for generating an input DC voltage from an input AC voltage. A switching transistor is coupled to a primary coil of a transformer for generating power which is transferred to a second side of the transformer according to an operation of the switching transistor. A switching controller receives a feedback voltage corresponding to an output voltage, a sensing signal corresponding to a current flowing through the switching transistor, and a first signal corresponding to a voltage difference between a first electrode and a second electrode of the switching transistor. The switching controller controls an on/off operation of the switching transistor. The switching controller sets a threshold period whenever the first signal has a value greater than a reference value, thereby setting a plurality of threshold periods during operation of the switching mode power supply. For each threshold period, the switching controller turns on the switching transistor at a point after a variable delay time from a previous point at which the switching transistor was turned on.

Abstract translation: 在一个实施例中，SMPS包括用于从输入AC电压产生输入DC电压的整流器。 开关晶体管耦合到变压器的初级线圈，用于根据开关晶体管的操作产生传输到变压器的第二侧的功率。 开关控制器接收对应于输出电压的反馈电压，对应于流过开关晶体管的电流的感测信号，以及对应于开关晶体管的第一电极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/截止操作。 每当第一信号具有大于参考值的值时，开关控制器设置阈值周期，从而在开关模式电源的操作期间设定多个阈值周期。 对于每个阈值周期，开关控制器在从开关晶体管导通的前一点起的可变延迟时间之后的点处接通开关晶体管。

公开(公告)号：US08000119B2

公开(公告)日：2011-08-16

申请号：US11879550

申请日：2007-07-18

Applicant: Hang-Seok Choi ,  Gwan-Bon Koo ,  Jae-Hwoan Chi

Inventor： Hang-Seok Choi ,  Gwan-Bon Koo ,  Jae-Hwoan Chi

IPC: H02M7/537

CPC classification number: H02M1/44 ,  H02M3/33523 ,  Y02B70/1433

Abstract: In one embodiment, an SMPS includes a rectifier for generating an input DC voltage from an input AC voltage. A switching transistor is coupled to a primary coil of a transformer for generating power which is transferred to a second side of the transformer according to an operation of the switching transistor. A switching controller receives a feedback voltage corresponding to an output voltage, a sensing signal corresponding to a current flowing through the switching transistor, and a first signal corresponding to a voltage difference between a first electrode and a second electrode of the switching transistor. The switching controller controls an on/off operation of the switching transistor. The switching controller sets a threshold period whenever the first signal has a value greater than a reference value, thereby setting a plurality of threshold periods during operation of the switching mode power supply. For each threshold period, the switching controller turns on the switching transistor at a point after a variable delay time from a previous point at which the switching transistor was turned on.

Abstract translation: 在一个实施例中，SMPS包括用于从输入AC电压产生输入DC电压的整流器。 开关晶体管耦合到变压器的初级线圈，用于根据开关晶体管的操作产生传输到变压器的第二侧的功率。 开关控制器接收对应于输出电压的反馈电压，对应于流过开关晶体管的电流的感测信号，以及对应于开关晶体管的第一电极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/截止操作。 每当第一信号具有大于参考值的值时，开关控制器设置阈值周期，从而在开关模式电源的操作期间设定多个阈值周期。 对于每个阈值周期，开关控制器在从开关晶体管导通的前一点起的可变延迟时间之后的点处接通开关晶体管。

公开(公告)号：US20090251926A1

公开(公告)日：2009-10-08

申请号：US12220769

申请日：2008-07-25

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

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

IPC: H02M3/335

CPC classification number: H02M3/33569

Abstract: 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.

Abstract translation: 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：US20070285953A1

公开(公告)日：2007-12-13

申请号：US11818421

申请日：2007-06-13

Applicant: Gwan-Bon Koo ,  Hang-Seok Choi ,  Jae-Hwoan Chi

Inventor： Gwan-Bon Koo ,  Hang-Seok Choi ,  Jae-Hwoan Chi

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  Y02B70/1433

Abstract: The present invention relates to a quasi-resonant converter. In the quasi-resonant converter according to the present invention, a predetermined first period and a second period following to the first period are set. In the second period, a switch is turned on at a time point where voltages at both ends of the switch fall to the minimum if the second period includes the time point, and the switch is turned on at the end of the second period if the second period does not include the time point. Therefore, the switching frequency of the switch can be restricted within a predetermined range.

Abstract translation: 本发明涉及准谐振转换器。 在根据本发明的准谐振变换器中，设定第一期间之后的规定的第一期间和第二期间。 在第二时段中，如果第二周期包括时间点，则开关两端的电压下降到最小的时间点开关，并且在第二周期结束时开关接通 第二期不包括时间点。 因此，可以将开关的开关频率限制在预定范围内。