公开(公告)号：US07269038B2

公开(公告)日：2007-09-11

申请号：US11224167

申请日：2005-09-12

申请人： Sampat Shekhawat ,  Ronald H. Randall ,  Dong-Young Huh

发明人： Sampat Shekhawat ,  Ronald H. Randall ,  Dong-Young Huh

IPC分类号： H02M7/48

CPC分类号： H02M1/42 ,  H02M7/219 ,  Y02B70/12 ,  Y02P80/112

摘要： A synchronous full bridge rectifier is controlled to provide a power factor near unity. The full bridge rectifiers are transistors each with a controlling input. The AC input signal and currents within the circuit are sensed and sent to a controller. In response, the controller output control signals to turn on/off the rectifying MOSFETS on a timely basis to form a power factor of near one with respect to the AC input signal. The full wave rectifier is made of N-channel MOSFET's, some with fast body diodes. The MOSFET's are rectifiers and PFC control elements. The result is a one stage synchronous rectifier with PFC. A solid state precision analog differential amplifier senses the AC line waveform and high frequency current transformers sense the currents. The controller accepts the inputs of the amplifier and the sensed currents and outputs control signals that turn on and off the four MOSFET's. The timing of turning on/off is arranged so that the current drawn from the AC source is sinusoidal and matches the phase of the sinusoidal AC source.

摘要翻译： 控制同步全桥整流器以提供接近一致的功率因数。 全桥整流器是每个具有控制输入的晶体管。 AC输入信号和电路内的电流被检测并发送到控制器。 作为响应，控制器输出控制信号以及时地导通/关闭整流MOSFET，以形成相对于AC输入信号接近1的功率因数。 全波整流器由N沟道MOSFET制成，其中一些具有快速的体二极管。 MOSFET是整流器和PFC控制元件。 结果是具有PFC的单级同步整流器。 固态精密模拟差分放大器感测交流线路波形，高频电流互感器感应电流。 控制器接受放大器和感应电流的输入，并输出导通和关断四个MOSFET的控制信号。 布置开/关的时间，使得从AC源引出的电流是正弦的，并且与正弦AC电源的相位匹配。

公开(公告)号：US20070058402A1

公开(公告)日：2007-03-15

申请号：US11224167

申请日：2005-09-12

申请人： Sampat Shekhawat ,  Ronald Randall ,  Dong-Young Huh

发明人： Sampat Shekhawat ,  Ronald Randall ,  Dong-Young Huh

IPC分类号： H02M7/04

CPC分类号： H02M1/42 ,  H02M7/219 ,  Y02B70/12 ,  Y02P80/112

摘要： A synchronous full bridge rectifier is controlled to provide a power factor near unity. The full bridge rectifiers are transistors each with a controlling input. The AC input signal and currents within the circuit are sensed and sent to a controller. In response, the controller output control signals to turn on/off the rectifying MOSFETS on a timely basis to form a power factor of near one with respect to the AC input signal. The full wave rectifier is made of N-channel MOSFET's, some with fast body diodes. The MOSFET's are rectifiers and PFC control elements. The result is a one stage synchronous rectifier with PFC. A solid state precision analog differential amplifier senses the AC line waveform and high frequency current transformers sense the currents. The controller accepts the inputs of the amplifier and the sensed currents and outputs control signals that turn on and off the four MOSFET's. The timing of turning on/off is arranged so that the current drawn from the AC source is sinusoidal and matches the phase of the sinusoidal AC source.

公开(公告)号：US07548437B2

公开(公告)日：2009-06-16

申请号：US11121334

申请日：2005-05-03

申请人： Jin-Ho Choi ,  Dong-Young Huh ,  Yong-Chul Ryu

发明人： Jin-Ho Choi ,  Dong-Young Huh ,  Yong-Chul Ryu

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M2001/0022

摘要： A switching mode power supply (SMPS) is presented to compensate for variations of maximum output power caused by variations of input power. The output power varies according to variations of input power because of a propagation delay of the SMPS. To compensate for the propagation delay, a reference voltage for turning off a switching MOS transistor is differently established depending on the input voltage. The variation of maximum output power according to the input voltage is prevented by differentiating the turned-off time of the reference voltage for turning off a main switch, such as a switching MOS transistor according to the input voltage.

摘要翻译： 提供开关模式电源（SMPS）以补偿由输入功率的变化引起的最大输出功率的变化。 由于SMPS的传播延迟，输出功率因输入功率的变化而变化。 为了补偿传播延迟，根据输入电压不同地建立用于关断开关MOS晶体管的参考电压。 通过根据输入电压来区分用于关断诸如开关MOS晶体管的主开关的基准电压的截止时间来防止根据输入电压的最大输出功率的变化。

公开(公告)号：US20050281062A1

公开(公告)日：2005-12-22

申请号：US11153819

申请日：2005-06-15

申请人： Jin-Ho Choi ,  Young-Chul Ryu ,  Dong-Young Huh

发明人： Jin-Ho Choi ,  Young-Chul Ryu ,  Dong-Young Huh

IPC分类号： H02M3/28 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M3/33523

摘要： In one embodiment, a switching mode power supply (SMPS) may comprise: a power supply for supplying power to a secondary coil of a transformer according to an operation of a main switch, the main switch being coupled to a primary coil of the transformer; a feedback circuit for generating a feedback voltage corresponding to an output voltage; a control module for stopping the main switch when the feedback voltage is lower than a reference voltage in a standby operation mode; an integrated circuit (IC) power unit for generating a constant voltage, the IC power supply being coupled to the secondary coil of the transformer; and a current generator for using the constant voltage to generate a plurality of constant currents for operating a plurality of ICs, and generating a constant current from among the constant currents when the main switch performs no switching on/off operation.

摘要翻译： 在一个实施例中，开关模式电源（SMPS）可以包括：根据主开关的操作向变压器的次级线圈供电的电源，主开关耦合到变压器的初级线圈; 用于产生对应于输出电压的反馈电压的反馈电路; 控制模块，用于当所述反馈电压低于备用运行模式中的基准电压时，停止所述主开关; 用于产生恒定电压的集成电路（IC）功率单元，所述IC电源耦合到所述变压器的次级线圈; 以及电流发生器，用于使用恒定电压产生用于操作多个IC的多个恒定电流，并且当主开关不执行开/关操作时从恒定电流产生恒定电流。

公开(公告)号：US07054169B2

公开(公告)日：2006-05-30

申请号：US10163801

申请日：2002-06-05

申请人： Dong-Young Huh ,  Yong-Jin Joo

发明人： Dong-Young Huh ,  Yong-Jin Joo

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M2001/0032 ,  H02M2001/0041 ,  Y02B70/16

摘要： A switched-mode power supply (SMPS) that operates in a burst mode when an electronic device that receives power from the SMPS demands a low level of power as when in a stand-by mode or cut-off mode. The SMPS contains a first power supply unit for receiving a power and rectifying it, and, according to a level of an output for the load, distinguishing between a normal mode and a burst mode to perform switching according to a timing corresponding to the normal mode and the burst mode to supply a first power. The SMPS also contains an output power supply unit for receiving the first power from the first power supply unit according to a winding ratio of a coil to generate a power for driving the load.

公开(公告)号：US20050078493A1

公开(公告)日：2005-04-14

申请号：US10920816

申请日：2004-08-18

申请人： Jung-Won Kim ,  Dong-Young Huh

发明人： Jung-Won Kim ,  Dong-Young Huh

IPC分类号： H02M3/28 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0048 ,  Y02B70/1491

摘要： A switching power supply includes a switch, a bias-sensor to sense the switch-voltage, and a zero-crossing detector (ZCD) to sense time instances when the bias-sensor voltage crosses zero. ZCD generates a ZCD-signal, which transitions between a first and a second level at the sensed crossing instances, with a delay. ZCD-signal is coupled to a blanking circuit, generating a blank-signal and a pulse-signal, controlling the switch. The on-time of the switch can be modified by the input voltage and load. The blank-signal between on-times is adjusted to compensate for this modification, keeping the switching frequency below a predetermined limit and reducing the switching frequency. The switching power supply further includes a pulse width modulation (PWM) signal generator, coupled to the blanking circuit and to the switch. PWM signal generator turns on the switch controlled by the pulse-signal of the blanking circuit. Blanking circuit is controlled by either the on-time or a control voltage and input voltage.

摘要翻译： 开关电源包括开关，感测开关电压的偏置传感器，以及当偏置传感器电压跨越零时检测时间实例的过零检测器（ZCD）。 ZCD产生一个ZCD信号，该ZCD信号在感测到的交叉实例处在第一和第二电平之间以延迟转换。 ZCD信号耦合到消隐电路，产生空白信号和脉冲信号，控制开关。 可以通过输入电压和负载来修改开关的导通时间。 调整接通时间之间的空白信号以补偿该修改，保持开关频率低于预定限制并降低开关频率。 开关电源还包括脉冲宽度调制（PWM）信号发生器，耦合到消隐电路和开关。 PWM信号发生器接通由消隐电路的脉冲信号控制的开关。 消隐电路由导通时间或控制电压和输入电压控制。

公开(公告)号：US06845019B2

公开(公告)日：2005-01-18

申请号：US10346807

申请日：2003-01-17

申请人： Jung-Won Kim ,  Dong-Young Huh

发明人： Jung-Won Kim ,  Dong-Young Huh

IPC分类号： H01F38/42 ,  H02M3/335

CPC分类号： H02M3/33507

摘要： A flyback converter detects an output voltage at the primary coil without using a photo coupler and provides an essentially constant output voltage independent of the load size, thereby minimizing the number of additional coils used in the transformer circuit to realize simple construction and providing accurate power control. In one embodiment, the flyback converter includes: a transformer for changing an input voltage to a predetermined level according to a winding ratio; an output unit for rectifying the voltage signal output from the transformer into a DC signal to drive a load; a switch coupled to the primary coil of the transformer for controlling the on/off state of a power at the primary coil according to a switching control signal; a feedback unit generating a feedback signal and detecting a current of the switch to correct the feedback signal; and a switching controller operating according to the feedback signal.

摘要翻译： 反激转换器在不使用光电耦合器的情况下检测初级线圈处的输出电压，并提供与负载尺寸无关的基本恒定的输出电压，从而最小化变压器电路中使用的附加线圈数量，以实现简单的结构并提供精确的功率控制 。 在一个实施例中，反激转换器包括：变压器，用于根据绕组比将输入电压改变到预定电平; 用于将从变压器输出的电压信号整流为DC信号以驱动负载的输出单元; 耦合到所述变压器的初级线圈的开关，用于根据开关控制信号控制所述初级线圈处的功率的导通/截止状态; 反馈单元，产生反馈信号并检测开关的电流以校正反馈信号; 以及根据反馈信号操作的开关控制器。

公开(公告)号：US06593709B2

公开(公告)日：2003-07-15

申请号：US09953513

申请日：2001-09-14

申请人： Sang-Woo Lee ,  Dong-Young Huh

发明人： Sang-Woo Lee ,  Dong-Young Huh

IPC分类号： H05B3700

CPC分类号： H05B41/3921 ,  Y10S315/04

摘要： An electronic lamp dimmer includes a burst dimmer circuit and an analog dimmer circuit formed adjacent to each other on an integrated circuit substrate. The burst dimmer circuit controls the illumination intensity of a lamp over a first operating range and the analog dimmer circuit controls the illumination intensity of the lamp over a second operating range that overlaps the first operating range. The electronic dimmer includes a plurality of electrical contacts, each of which is electrically coupled to one of the burst dimmer and analog dimmer circuits and one of which simultaneously provides a dimming control voltage to both of the burst dimmer and analog dimmer circuits.

公开(公告)号：US5684681A

公开(公告)日：1997-11-04

申请号：US601516

申请日：1996-02-14

申请人： Dong-Young Huh

发明人： Dong-Young Huh

IPC分类号： H02M3/28 ,  H02M3/337 ,  H02M3/338 ,  H03K17/691 ,  H02M3/335

CPC分类号： H03K17/691 ,  H02M3/3388

摘要： Described is a drive circuit of a switching element for controlling a switching element. The drive circuit of a switching element in the present invention includes a power conversion section for converting an alternating current inputted to a direct current; a switching element for switching the direct current of the power conversion section to load; an oscillator for generating a drive signal having rectangular pulse form with a predetermined cycle according to a control signal inputted from outside; a first control signal generator for generating a first control signal each time a drive signal of an oscillator is triggered from a low level to a high level; a second control signal generator for generating a second control signal each time a control signal inputted from outside is triggered from a high level to a low level; and a drive section for switching the switching element to turn-on state according to a first control signal and for switching the switching element to turn-off state according to a second control signal. As the first control signal is generated periodically and successively, precise switching of the switching element can be achieved even when the cycle of switching is low, and thus reducing the size of a transformer.

摘要翻译： 描述了用于控制开关元件的开关元件的驱动电路。 本发明的开关元件的驱动电路包括用于转换输入到直流电的交流电的电力转换部; 用于将电力转换部分的直流切换为负载的开关元件; 振荡器，用于根据从外部输入的控制信号，以预定的周期产生具有矩形脉冲形式的驱动信号; 第一控制信号发生器，用于每当振荡器的驱动信号从低电平触发到高电平时产生第一控制信号; 每当从外部输入的控制信号从高电平触发到低电平时，产生第二控制信号的第二控制信号发生器; 以及驱动部分，用于根据第一控制信号将开关元件切换到导通状态，并根据第二控制信号将开关元件切换到截止状态。 由于周期性且连续地产生第一控制信号，即使在切换周期低的情况下也能够实现开关元件的精确切换，从而减小变压器的尺寸。

公开(公告)号：US07079404B2

公开(公告)日：2006-07-18

申请号：US10672997

申请日：2003-09-26

申请人： Jong-Woon Hong ,  Dong-Young Huh

发明人： Jong-Woon Hong ,  Dong-Young Huh

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M2001/0032 ,  H02M2001/009 ,  Y02B70/16

摘要： A switching mode power supply is described. The switching mode power supply includes a power supply unit, a mode setting unit, a feedback circuit, and a switching controller. The switching controller controls a main switch to carry out a switching operation at a predetermined duty according to feedback voltage charged in a first capacitor in the normal operation mode, and controls the main switch to repeat a switching on state and a switching off state in the standby mode. The current inputted to the switching controller varies with the operation mode. Accordingly, the minimum voltage for operating the switching controller can be maintained even if output voltage is decreased in the standby mode, and unnecessary power consumption in the switching controller can be reduced.

摘要翻译： 描述了开关模式电源。 开关模式电源包括电源单元，模式设置单元，反馈电路和开关控制器。 开关控制器控制主开关，根据在正常工作模式下的第一电容器中充电的反馈电压，以预定的占空比执行开关操作，并且控制主开关重复开关状态和断开状态 待机模式。 输入到切换控制器的电流随着操作模式而变化。 因此，即使在待机模式下输出电压降低，也可以维持用于操作开关控制器的最小电压，并且可以减少开关控制器中的不必要的功耗。