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1. 发明申请

US20140233275A1 ADAPTIVE ACTIVE CLAMP OF FLYBACK POWER CONVERTER WITH HIGH EFFICIENCY FOR HEAVY LOAD AND LIGHT LOAD 有权
标题翻译：适用于重负荷和轻负载的高效飞轮功率转换器的自适应有源钳位
公开(公告)号：US20140233275A1
公开(公告)日：2014-08-21
申请号：US14182442
申请日：2014-02-18
申请人： System General Corp.
发明人： TA-YUNG YANG , CHIH-HSIEN HSIEH , KAI-FANG WEI , JUNG-SHENG CHEN
IPC分类号： H02M3/335
CPC分类号： H02M3/33576 , H02M2001/0032 , Y02B70/16
摘要： A control circuit of a flyback power converter according to the present invention comprises a low-side transistor, an active-damper, a high-side drive circuit, and a controller. The low-side transistor is coupled to switch a transformer. The active-damper is coupled in parallel with the transformer. The high-side drive circuit is coupled to drive the active-clamper. The controller generates a switching signal and an active-clamp signal. The switching signal is coupled to drive the low-side transistor. The switching signal is generated in accordance with a feedback signal for regulating an output of the flyback power converter. The active-clamp signal is coupled to control the high-side drive circuit and the active-damper. The active-clamp signal is generated in response to a demagnetizing time of the transformer. The pulse number of the active-clamp signal is less than the pulse number of the switching signal in a light load condition.
摘要翻译：根据本发明的反激式功率转换器的控制电路包括低侧晶体管，主动阻尼器，高侧驱动电路和控制器。低侧晶体管被耦合以切换变压器。主动阻尼器与变压器并联。高侧驱动电路被耦合以驱动主动钳位器。控制器产生开关信号和有源钳位信号。开关信号被耦合以驱动低侧晶体管。根据用于调节反激式功率转换器的输出的反馈信号产生开关信号。有源钳位信号被耦合以控制高侧驱动电路和主动阻尼器。响应于变压器的消磁时间而产生有源钳位信号。有源钳位信号的脉冲数小于轻负载条件下的开关信号的脉冲数。

2. 发明申请

US20130182476A1 ADAPTIVE SAMPLING CIRCUIT FOR DETECTING THE DEMAGNETIZED VOLTAGE OF THE TRANSFORMER 有权
标题翻译：用于检测变压器脱扣电压的自适应采样电路
公开(公告)号：US20130182476A1
公开(公告)日：2013-07-18
申请号：US13742529
申请日：2013-01-16
申请人： System General Corp.
发明人： TA-YUNG YANG , LI LIN , JUNG-SHENG CHEN , CHIH-HSIEN HSIEH
IPC分类号： H02M7/48
CPC分类号： H02M7/48 , G01R31/42 , H02M3/33523
摘要： An adaptive sampling circuit of the power converter according to the present invention comprises a sample-and-hold unit and a signal-generation circuit. The sample-and-hold unit is coupled to a transformer to generate a feedback signal by sampling a demagnetized voltage of the transformer in response to a sample signal. The signal-generation circuit generates the sample signal in response to a magnetized voltage of the transformer, the demagnetized voltage of the transformer, a switching signal and a code. The sample signal is used for sampling the demagnetized voltage. The feedback signal is correlated to an output voltage of the power converter. The switching signal is generated in response to the feedback signal for switching the transformer and regulating the output of the power converter. The adaptive sampling circuit is used to precisely measure the demagnetized voltage of the transformer without the limitation of the transformer design.
摘要翻译：根据本发明的功率转换器的自适应采样电路包括采样保持单元和信号发生电路。采样和保持单元耦合到变压器以通过响应于采样信号对变压器的退磁电压进行采样来产生反馈信号。信号发生电路响应于变压器的磁化电压，变压器的退磁电压，开关信号和代码产生采样信号。采样信号用于对退磁电压进行采样。反馈信号与功率转换器的输出电压相关。响应于用于切换变压器的反馈信号和调节功率转换器的输出而产生开关信号。自适应采样电路用于精确测量变压器的退磁电压，而不受变压器设计的限制。

3. 发明申请

US20140146579A1 TRANSISTOR GATE DRIVER WITH CHARGE PUMP CIRCUIT FOR OFFLINE POWER CONVERTERS 有权
标题翻译：带离子电源转换器的充电泵电路的晶闸管驱动器
公开(公告)号：US20140146579A1
公开(公告)日：2014-05-29
申请号：US14088628
申请日：2013-11-25
申请人： SYSTEM GENERAL CORP.
发明人： TA-YUNG YANG , CHIN-YEN LIN , JUNG-SHENG CHEN , LI LIN
IPC分类号： H02M3/335
CPC分类号： H02M3/33523 , H03K17/063
摘要： A controller of the power converter according to the present invention comprises a gate driver. The gate driver generates a gate-drive signal. The gate-drive signal is coupled to drive a power transistor to switch a transformer of the power converter for regulating an output of the power converter. The gate driver has a charge-pump circuit for charging pump a voltage level of the gate-drive signal. Therefore, the gate-drive signal can fully turn on the power transistor.
摘要翻译：根据本发明的功率转换器的控制器包括栅极驱动器。栅极驱动器产生栅极驱动信号。栅极驱动信号被耦合以驱动功率晶体管以切换功率转换器的变压器，以调节功率转换器的输出。栅极驱动器具有电荷泵电路，用于对栅极驱动信号的电压电平进行充电。因此，栅极驱动信号可以完全打开功率晶体管。

4. 发明申请

US20140036548A1 CONTROL CIRCUIT WITH FAST DYNAMIC RESPONSE FOR POWER CONVERTERS 有权
标题翻译：用于功率转换器的快速动态响应的控制电路
公开(公告)号：US20140036548A1
公开(公告)日：2014-02-06
申请号：US13957725
申请日：2013-08-02
申请人： SYSTEM GENERAL CORP.
发明人： TA-YUNG YANG , LI LIN , JUNG-SHENG CHEN
IPC分类号： H02M3/335
CPC分类号： H02M3/335 , H02M3/33507 , H02M2003/1566
摘要： A control circuit of a power converter is provided. It comprises a voltage detection circuit detecting a reflected signal for generating a voltage-loop signal. A current detection circuit detects a current of a transformer for generating a current-loop signal. An oscillator generates an oscillation signal in accordance with an output load of the power converter. A PWM circuit generates a switching signal according to the voltage-loop signal, the current-loop signal and the oscillation signal for regulating an output of the power converter. A load detection circuit receives a detection signal through an signal-transfer device for increasing a switching frequency of the switching signal. The detection signal is generated once the output is lower than a low-voltage threshold. The oscillation signal determines the switching frequency of the switching signal. The control circuit reduces the voltage drop of the output when the output load is changed.
摘要翻译：提供电力转换器的控制电路。它包括检测用于产生电压环路信号的反射信号的电压检测电路。电流检测电路检测用于产生电流环路信号的变压器的电流。振荡器根据功率转换器的输出负载产生振荡信号。 PWM电路根据电压环路信号，电流环路信号和用于调节功率转换器的输出的振荡信号产生开关信号。负载检测电路通过用于增加开关信号的开关频率的信号传送装置接收检测信号。一旦输出低于低电压阈值，就产生检测信号。振荡信号决定开关信号的开关频率。当输出负载变化时，控制电路可以降低输出的电压降。

5. 发明申请

US20130250628A1 SAMPLING CIRCUIT FOR MEASURING THE REFLECTED VOLTAGE OF TRANSFORMER FOR POWER CONVERTER 有权
标题翻译：用于测量电力变压器变压器反射电压的采集电路
公开(公告)号：US20130250628A1
公开(公告)日：2013-09-26
申请号：US13848102
申请日：2013-03-21
申请人： SYSTEM GENERAL CORP.
发明人： CHIN-YEN LIN , JUNG-SHENG CHEN , LI LIN , YUE-HONG TANG
IPC分类号： H02M1/08 , H02M3/335
CPC分类号： H02M1/08 , G01R31/40 , H02M3/33523
摘要： A sampling circuit of the power converter according to the present invention comprises an amplifier circuit receiving a reflected voltage for generating a first signal. A first switch and a first capacitor are utilized to generate a second signal in response to the reflected voltage. A sample-signal circuit generates a sample signal in response to a falling edge of a switching signal. The switching signal is generated in accordance with a feedback signal for regulating an output of the power converter. The feedback signal is generated in accordance with the second signal. The sample signal is utilized to control the first switch for sampling the reflected voltage. The sample signal is disabled once the first signal is lower than the second signal. The sampling circuit precisely samples the reflected voltage of the transformer of the power converter for regulating the output of the power converter.
摘要翻译：根据本发明的功率转换器的采样电路包括接收用于产生第一信号的反射电压的放大器电路。利用第一开关和第一电容器来响应于反射电压产生第二信号。采样信号电路响应于开关信号的下降沿产生采样信号。根据用于调节功率转换器的输出的反馈信号产生开关信号。反馈信号根据第二信号产生。采样信号用于控制第一开关以对反射电压进行采样。第一个信号低于第二个信号时，采样信号被禁止。采样电路对功率转换器的变压器的反射电压进行精确采样，以调节功率转换器的输出。

6. 发明申请

US20130249601A1 SAMPLING CIRCUIT FOR MEASURING REFLECTED VOLTAGE OF TRANSFORMER FOR POWER CONVERTER OPERATED IN DCM AND CCM 有权
标题翻译：用于测量在DCM和CCM中操作的功率转换器的变压器的反射电压的采样电路
公开(公告)号：US20130249601A1
公开(公告)日：2013-09-26
申请号：US13847567
申请日：2013-03-20
申请人： SYSTEM GENERAL CORP.
发明人： LI LIN , YUE-HONG TANG , CHIN-YEN LIN , JUNG-SHENG CHEN , TA-YUNG YANG
IPC分类号： G11C27/02
CPC分类号： G11C27/02 , G11C27/026 , H02M3/33523
摘要： A sampling circuit of the power converter according to the present invention comprises an amplifier circuit receiving a reflected voltage for generating a first signal. A first switch and a first capacitor are utilized to generate a second signal in response to the reflected voltage. A sample-signal circuit generates a sample signal in response to the disable of a switching signal. The switching signal is generated in accordance with a feedback signal for regulating an output of the power converter. The feedback signal is generated in accordance with the second signal. The sample signal is utilized to control the first switch for sampling the reflected voltage. The sample signal is disabled once the first signal is lower than the second signal. The sampling circuit precisely samples the reflected voltage of the transformer of the power converter for regulating the output of the power converter.
摘要翻译：根据本发明的功率转换器的采样电路包括接收用于产生第一信号的反射电压的放大器电路。利用第一开关和第一电容器来响应于反射电压产生第二信号。采样信号电路响应于开关信号的禁用而产生采样信号。根据用于调节功率转换器的输出的反馈信号产生开关信号。反馈信号根据第二信号产生。采样信号用于控制第一开关以对反射电压进行采样。第一个信号低于第二个信号时，采样信号被禁止。采样电路对功率转换器的变压器的反射电压进行精确采样，以调节功率转换器的输出。

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