公开(公告)号：US20070173026A1

公开(公告)日：2007-07-26

申请号：US11336899

申请日：2006-01-23

申请人： JinChuan Zeng ,  Chong Ren ,  Bin Qiu ,  Xian-Feng Liu

发明人： JinChuan Zeng ,  Chong Ren ,  Bin Qiu ,  Xian-Feng Liu

IPC分类号： H01L21/331 ,  H01L21/8222

CPC分类号： H01L27/0658 ,  H01L21/8224 ,  H01L27/067 ,  H01L27/0682 ,  H01L27/0821 ,  H01L28/20

摘要： The present invention discloses a method for fabricating bipolar integrated circuits, wherein LOCOS technology is used to define the active regions needed by all elements so that the self-alignment of the associated layers can be realized, and implant resistor regions are also directly defined in the active regions by local oxide layers; after base regions have been driven in the wafer, the resistors are implanted into the wafer so that the cost of resistor photomasks can be saved; silicon nitride is adopted to be the material of the dielectric layers of the capacitors, and with the characteristic of a buffering oxide etchant that etches oxide faster than it etches silicon nitride, the conventional deposition sequence of the dielectric layer is changed so that the formation of the dielectric layer needs only a single photomask.

摘要翻译： 本发明公开了一种用于制造双极集成电路的方法，其中使用LOCOS技术来定义所有元件所需的有源区域，从而可以实现相关层的自对准，注入电阻器区域也直接限定在 活性区域由局部氧化物层; 在晶圆驱动基极区之后，将电阻注入到晶片中，从而可以节省电阻光掩模的成本; 采用氮化硅作为电容器的电介质层的材料，并且具有缓蚀氧化物蚀刻剂的特性，其蚀刻氧化物比其刻蚀氮化硅更快，介电层的常规沉积顺序发生变化，从而形成 电介质层仅需要一个光掩模。

公开(公告)号：US10462868B2

公开(公告)日：2019-10-29

申请号：US14499075

申请日：2014-09-26

申请人： BCD Semiconductor Manufacturing Limited

发明人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

IPC分类号： H05B33/08

摘要： A driver circuit for an LED (light-emitting diode) lamp includes a transformer having a primary winding and a secondary winding, a dimmer circuit coupled to a power source for varying an input voltage to the primary winding, and an output rectifying circuit coupled to the secondary winding for providing an output current to the LED lamp. The driver circuit also includes a controller coupled to the dimmer circuit to receive an average input voltage signal (DIM) from the dimmer circuit. The controller is configured to vary the output current according to the average input voltage.

公开(公告)号：US09853542B2

公开(公告)日：2017-12-26

申请号：US15019773

申请日：2016-02-09

申请人： BCD SEMICONDUCTOR MANUFACTURING CO., LTD.

发明人： Hu Wang ,  Yajiang Zhu ,  Ruixia Fei ,  Shuzhuang Lv

IPC分类号： H02M3/156 ,  H02M1/00 ,  H02M3/10 ,  H02M7/217 ,  H02M1/08

CPC分类号： H02M3/156 ,  H02M1/08 ,  H02M3/10 ,  H02M7/2176 ,  H02M2001/0009 ,  H02M2001/0022

摘要： A control circuit is provided for a buck converter that includes at least an inductor coupled to an output of the buck converter. The control circuit includes a power switch configured for coupling to a line voltage and configured for charging the inductor, an input line voltage sampling circuit, and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch. During a charging period of the inductor, the CV and CC control module is configured to control the power switch to provide a constant output current by maintaining a constant peak inductor current, even when the input line voltage changes. During a discharging period of the inductor, the CV and CC control module is configured to monitor the sensed output voltage to control the power switch to provide a constant output voltage.

公开(公告)号：US09134349B2

公开(公告)日：2015-09-15

申请号：US13711571

申请日：2012-12-11

申请人： BCD Semiconductor Manufacturing Limited

发明人： Jinxi Hu ,  Jiabin Wang ,  Xujiang Huang

IPC分类号： G01R15/20 ,  G01R33/07 ,  H03F3/387 ,  H03F3/45

CPC分类号： G01R15/202 ,  G01R33/07 ,  H03F3/387 ,  H03F3/45475 ,  H03F3/45995 ,  H03F2200/261 ,  H03F2203/45138 ,  H03F2203/45528 ,  H03F2203/45538 ,  H03F2203/45551 ,  H03F2203/45588 ,  H03F2203/45624 ,  H03F2203/45634 ,  H03F2203/45681

摘要： A chopper amplifier circuit for sensing Hall voltage with reduced offsets includes a Hall sampling circuit with a first switching circuit for selectively coupling each of four nodes of a Hall plate to either a power source or a ground terminal. The circuit also includes a differential amplifier and a second switching circuit configured for selectively coupling each of the four nodes to inputs of the differential amplifier. A Hall voltage signal retaining circuit includes two groups of four storage devices and a second group of four storage devices. A third switching circuit is configured for outputs of the differential amplifier to selected ones of the storage devices. A fourth switching circuit is configured for selectively coupling the storage devices outputs of the chopper amplifier circuit.

摘要翻译： 用于以减小的偏移量感测霍尔电压的斩波放大器电路包括具有第一开关电路的霍尔采样电路，用于选择性地将霍尔板的四个节点中的每一个耦合到电源或接地端子。 电路还包括差分放大器和配置用于选择性地将四个节点中的每一个耦合到差分放大器的输入的第二开关电路。 霍尔电压信号保持电路包括两组四个存储装置和第二组四个存储装置。 第三开关电路被配置用于将差分放大器的输出与所选存储器件的输出相配合。 第四开关电路被配置为选择性地耦合斩波放大器电路的存储设备输出。

公开(公告)号：US08964415B2

公开(公告)日：2015-02-24

申请号：US13610790

申请日：2012-09-11

申请人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

发明人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

IPC分类号： H02M3/335

CPC分类号： H02M1/4258 ,  Y02B70/126

摘要： A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF).

摘要翻译： 开关模式电源（SMPS）包括被配置为将周期性变化的输入AC（交流）电压转换为DC（直流）电压的整流装置，以及包括初级绕组，次级绕组和辅助绕组 。 初级绕组耦合到整流装置。 输入电容器耦合到整流装置和变压器的初级绕组。 第一电源开关耦合到输入电容器。 控制电路耦合到第一电源开关，并且被配置为基于输入AC电压的相位或幅度来控制第一功率开关。 通过控制输入电容器的充电和放电，在交流输入电压周期的较长部分期间向初级绕组提供功率，允许整流器件具有较大的导通角以增加功率因数（PF）。

公开(公告)号：US20140233272A1

公开(公告)日：2014-08-21

申请号：US13966248

申请日：2013-08-13

申请人： BCD Semiconductor Manufacturing Limited

发明人： ShaoHua Fang ,  BaoZhen Chen ,  Qiang Zong ,  YaJiang Zhu

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  H02M3/33561 ,  H02M3/33576 ,  H02M7/217 ,  H03K5/08 ,  H03K17/133 ,  H03K17/302 ,  H03K2017/307 ,  Y02B70/1475

摘要： A synchronous rectification circuit for a power supply includes a power switch for coupling to a secondary winding of a transformer of the power supply and an output capacitor of the power supply. The power switch includes a four-terminal MOSFET having a source, a drain, a gate, and a body. A body diode is formed by a junction between the body and the drain or by a junction between the body and the source. The body diode is coupled in parallel to the source and drain of the power transistor. A control circuit is configured to provide a control signal for controlling an on/off state of the power switch in response to a voltage condition of two terminals of the power switch. When the body diode makes a transition from reverse bias to forward bias, the control circuit causes the MOSFET to turn on, and when the forward bias voltage drops below a reference voltage, the control circuit causes the MOSFET to turn off. When the body diode makes a transition from forward bias to reverse bias, the control circuit causes the MOSFET to turn off

摘要翻译： 用于电源的同步整流电路包括用于耦合到电源的变压器的次级绕组的电源开关和电源的输出电容器。 电源开关包括具有源极，漏极，栅极和主体的四端子MOSFET。 体二极管由本体和漏极之间的接合部或者主体与源极之间的接合部形成。 体二极管与功率晶体管的源极和漏极并联耦合。 控制电路被配置为响应于电源开关的两个端子的电压状况来提供用于控制电源开关的接通/断开状态的控制信号。 当体二极管从反向偏压转换为正向偏置时，控制电路使MOSFET导通，当正向偏置电压降至参考电压以下时，控制电路使MOSFET关断。 当体二极管从正向偏压转换到反向偏置时，控制电路使MOSFET关断

公开(公告)号：US20130222044A1

公开(公告)日：2013-08-29

申请号：US13862289

申请日：2013-04-12

申请人： BCD Semiconductor Manufacturing Limited

发明人： Jianhua Duan ,  Qiang Zong ,  YaJiang Zhu

IPC分类号： H03K17/16

CPC分类号： H03K17/16 ,  G05F3/26 ,  G05F3/267 ,  G05F3/30 ,  H02M3/33507 ,  H03K17/04123 ,  H03K2217/0036

摘要： A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse.

摘要翻译： 提供电源控制器，用于以三个时间间隔向功率晶体管的控制端提供驱动电流。 该控制器包括配置成控制多级驱动电流的控制电路。 在第一时间间隔期间，第一驱动电流包括用于响应于控制信号脉冲的启动来接通功率晶体管的电流尖峰。 在第二时间间隔期间，第二驱动电流包括基本上与通过功率晶体管的电流的大小成比例的斜坡电流。 在第三时间间隔期间，在控制信号脉冲结束之前，至功率晶体管的电流至少部分截止。

公开(公告)号：US20120293146A1

公开(公告)日：2012-11-22

申请号：US13198981

申请日：2011-08-05

申请人： PingAn Zhao ,  Huizhen Zhu ,  Hu Wang ,  Chao Gao

发明人： PingAn Zhao ,  Huizhen Zhu ,  Hu Wang ,  Chao Gao

IPC分类号： G05F1/10

CPC分类号： H02M3/33507 ,  H02M1/44 ,  H02M2001/0032 ,  Y02B70/16

摘要： A control circuit is configured for controlling a power switch to regulate an output of a power converter. The control circuit is configured to increase a switching frequency of the power switch when a first signal representing a magnitude of the power converter is below a first output level. In some embodiment, the first output level is selected such that when the first signal is below the first output level, the power converter may generate audible noise. In an embodiment, when the first signal is above the first output level, the control circuit is configured to turn off the power switch when a second signal representing a current in the power switch is above a first reference level. On the other hand, when the first signal is below the first output level, the control circuit is configured to turn off the power switch if the second signal reaches a lower reference level.

摘要翻译： 控制电路被配置为用于控制功率开关以调节功率转换器的输出。 控制电路被配置为当表示功率转换器的幅度的第一信号低于第一输出电平时，增加电源开关的开关频率。 在一些实施例中，选择第一输出电平，使得当第一信号低于第一输出电平时，功率转换器可产生可听见的噪声。 在一个实施例中，当第一信号高于第一输出电平时，控制电路被配置为当表示电源开关中的电流的第二信号高于第一参考电平时，关闭电源开关。 另一方面，当第一信号低于第一输出电平时，如果第二信号达到较低的参考电平，则控制电路被配置为关闭电源开关。

公开(公告)号：US20120056548A1

公开(公告)日：2012-03-08

申请号：US13224325

申请日：2011-09-01

申请人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

发明人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

IPC分类号： H05B37/02 ,  G05F5/00

CPC分类号： H05B33/0851 ,  H05B33/0815 ,  H05B33/0818

摘要： A system for driving an LED (light-emitting diode) lamp includes a dimmer circuit coupled to a line input voltage for varying a magnitude of an input voltage and a transformer having a primary winding, a secondary winding, and one or more auxiliary windings, the primary winding coupled to the dimmer circuit. The system also includes an output rectifying circuit coupled to the secondary winding for providing an output current to the LED lamp and a power switch coupled to the primary winding for controlling a current flow in the primary winding. The system further includes a controller having a comparator and a capacitor for providing a control signal to control the power switch for regulating the output current. The controller coupled to the dimmer circuit for receiving an average input voltage signal from the dimmer circuit, wherein the control signal is characterized by a duty cycle that is determined by a ratio of a charging current to a discharging current of the capacitor, and the ratio is related to the average input voltage signal from the dimmer circuit.

摘要翻译： 用于驱动LED（发光二极管）灯的系统包括耦合到用于改变输入电压的大小的线路输入电压的调光器电路和具有初级绕组，次级绕组和一个或多个辅助绕组的变压器， 耦合到调光器电路的初级绕组。 该系统还包括耦合到次级绕组的输出整流电路，用于向LED灯提供输出电流，以及耦合到初级绕组的功率开关，用于控制初级绕组中的电流。 该系统还包括具有比较器和电容器的控制器，用于提供控制信号以控制用于调节输出电流的功率开关。 所述控制器耦合到所述调光器电路，用于接收来自所述调光器电路的平均输入电压信号，其中所述控制信号的特征在于由充电电流与所述电容器的放电电流的比率确定的占空比， 与来自调光电路的平均输入电压信号有关。

公开(公告)号：US08093955B2

公开(公告)日：2012-01-10

申请号：US12547984

申请日：2009-08-26

申请人： Zheng Ying ,  Huang Zhang Xu

发明人： Zheng Ying ,  Huang Zhang Xu

IPC分类号： H03K3/26

CPC分类号： H02M1/44 ,  H03K3/84 ,  H03K4/501

摘要： Method and apparatus for adding jitter to an oscillator for reducing EMI are disclosed An oscillator circuit includes an oscillator configured to generate a first clock having a first frequency and a frequency jitter circuit including a charge pump configured to charge and discharge first and second capacitors repeatedly for obtaining a time-varying voltage having a second frequency. The time-varying voltage is coupled to the oscillator to vary the first frequency within a frequency range. The charge pump includes a first switch for coupling the first capacitor to a voltage source and a second switch for coupling the first capacitor to the second capacitor. A charge transfer between the first and second capacitors is configured to provide the time-varying voltage.

摘要翻译： 公开了一种用于将抖动添加到振荡器以降低EMI的方法和装置。振荡器电路包括：振荡器，被配置为产生具有第一频率的第一时钟和包括电荷泵的频率抖动电路，所述电荷泵被配置为对第一和第二电容器重复充电和放电 获得具有第二频率的时变电压。 时变电压耦合到振荡器以在频率范围内改变第一频率。 电荷泵包括用于将第一电容器耦合到电压源的第一开关和用于将第一电容器耦合到第二电容器的第二开关。 第一和第二电容器之间的电荷转移被配置成提供时变电压。