公开(公告)号：US10483753B2

公开(公告)日：2019-11-19

申请号：US15722823

申请日：2017-10-02

申请人： SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING CO., LTD. ,  BCD SEMICONDUCTOR MANUFACTURING LIMITED

发明人： Shaohua Peng ,  Xuguang Zhang

IPC分类号： H02H7/18 ,  H02J7/00 ,  G06F1/26 ,  G06F1/30 ,  H04W88/02

摘要： A signal processing circuit includes a first circuit coupled between a power terminal and a first ground terminal and a second circuit coupled between the power terminal and a second ground terminal. The signal processing circuit is configured to receive a first signal at a voltage level relative to the first ground terminal and, in response to the first signal, provide a second signal at a voltage level relative to the second ground terminal. The signal processing circuit can be used in a battery protection circuit for a mobile device having an embedded battery. The battery protection circuit is configured with two NMOS transistors to allow the cell phone circuit to switch between the embedded battery and an external power source.

公开(公告)号：USRE46369E1

公开(公告)日：2017-04-18

申请号：US14316788

申请日：2014-06-26

申请人： BCD SEMICONDUCTOR MANUFACTURING LIMITED

发明人： Yajiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage, and an auxiliary winding. The SMPS also includes a power switch coupled to the primary winding. A first control circuit is coupled to the secondary winding, and is configured to provide a first electrical signal to the secondary winding when the output voltage of the SMPS is less than a reference voltage during a discontinuous time, whereupon a second electrical signal is induced in the auxiliary winding. A second control circuit is coupled to the auxiliary winding and the power switch. The second control circuit is configured to regulate the output of the SMPS by controlling the power switch in response to a feedback voltage signal from the auxiliary winding, and is further configured to turn on the power switch in response to the second electrical signal.

公开(公告)号：US08891259B2

公开(公告)日：2014-11-18

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： H02M3/335 ,  H02M1/00 ,  H02M1/44

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：US20140001968A1

公开(公告)日：2014-01-02

申请号：US13596332

申请日：2012-08-28

申请人： Jianbo SUN

发明人： Jianbo SUN

IPC分类号： H05B37/02

CPC分类号： H05B33/0845

摘要： A method for controlling a current flowing through one or more light emitting diodes (LEDs) comprising receiving a Pulse Width Modulation (PWM) control signal, which includes rising and falling edges; receiving a first voltage signal; generating a second voltage signal based on the PWM control signal and the first voltage signal, wherein the second voltage increases gradually in response to one of the rising and falling edges of the PWM signal and decreases gradually in response to the other of the rising and falling edges of the PWM signal; and providing a current to the one or more LEDs, wherein the current varies gradually according to the second voltage.

摘要翻译： 一种用于控制流过一个或多个发光二极管（LED）的电流的方法，包括接收包括上升沿和下降沿的脉宽调制（PWM）控制信号; 接收第一电压信号; 基于PWM控制信号和第一电压信号产生第二电压信号，其中第二电压响应于PWM信号的上升沿和下降沿之一逐渐增加，并且响应于另一个上升和下降而逐渐减小 PWM信号的边沿; 以及向所述一个或多个LED提供电流，其中所述电流根据所述第二电压逐渐变化。

公开(公告)号：US08377757B2

公开(公告)日：2013-02-19

申请号：US12772156

申请日：2010-04-30

申请人： Francis Edward Hawe ,  Jinsui Liang ,  Xiaoqiang Cheng ,  Xianfeng Liu

发明人： Francis Edward Hawe ,  Jinsui Liang ,  Xiaoqiang Cheng ,  Xianfeng Liu

IPC分类号： H01L21/332

CPC分类号： H01L29/8611 ,  H01L27/0255 ,  H01L29/866

摘要： A transient voltage suppressor (TVS) device includes a semiconductor substrate of a first conductivity type, and a first and a second semiconductor regions of a second conductivity type overlying the semiconductor substrate. A semiconductor layer of the second conductivity type overlies the first and the second semiconductor regions. The TVS device has a first trench extending through the semiconductor layer and the first semiconductor region and into the semiconductor substrate, and a fill material of the second conductivity type disposed in the first trench. A clamping diode in the TVS device has a junction between an out-diffused region from the fill material and a portion of the semiconductor substrate. The TVS device also includes a first P-N diode formed in a first portion of the semiconductor layer, and a second P-N diode having a junction between the second semiconductor region and the semiconductor substrate.

摘要翻译： 瞬态电压抑制器（TVS）器件包括第一导电类型的半导体衬底和覆盖半导体衬底的第二导电类型的第一和第二半导体区域。 第二导电类型的半导体层覆盖第一和第二半导体区域。 TVS器件具有延伸穿过半导体层和第一半导体区域并进入半导体衬底的第一沟槽和布置在第一沟槽中的第二导电类型的填充材料。 TVS器件中的钳位二极管在从填充材料的扩散区域和半导体衬底的一部分之间具有接合点。 TVS器件还包括形成在半导体层的第一部分中的第一P-N二极管和在第二半导体区域和半导体衬底之间具有接合点的第二P-N二极管。

公开(公告)号：US08213203B2

公开(公告)日：2012-07-03

申请号：US12620420

申请日：2009-11-17

申请人： Ruixia Fei ,  Tao Sun ,  QingHua Su ,  Huizhen Zhu

发明人： Ruixia Fei ,  Tao Sun ,  QingHua Su ,  Huizhen Zhu

IPC分类号： H02M7/537

CPC分类号： H02M3/33523

摘要： A controller for providing a constant output current control signal in a switched mode power supply (SMPS) includes a conduction time compensation circuit that is configured to produce a compensated conduction time interval signal that includes compensation for a ringing waveform of a feedback signal. The compensated signal reflects more accurately the actual conductive time of a rectifying diode in a secondary winding of the switched mode power supply. In one embodiment, the compensated conduction time interval signal is used to generate a fixed ratio between the conduction time and the non-conduction time of the rectifying diode. In another embodiment, the controller also provides a constant voltage control signal.

摘要翻译： 用于在开关模式电源（SMPS）中提供恒定输出电流控制信号的控制器包括导通时间补偿电路，其被配置为产生补偿的导通时间间隔信号，该信号包括对反馈信号的振铃波形的补偿。 补偿信号更准确地反映了开关模式电源的次级绕组中整流二极管的实际导通时间。 在一个实施例中，补偿导通时间间隔信号用于产生整流二极管的导通时间和非导通时间之间的固定比率。 在另一实施例中，控制器还提供恒定电压控制信号。

公开(公告)号：US08072160B2

公开(公告)日：2011-12-06

申请号：US12341176

申请日：2008-12-22

申请人： Chao-Qun Sun ,  Shi-Hai Zhu

发明人： Chao-Qun Sun ,  Shi-Hai Zhu

IPC分类号： H05B37/02

CPC分类号： H05B33/0818 ,  Y02B20/347

摘要： The present invention mainly discloses low power non-isolated driver that can be used for LED lighting and other non-isolated power supply appliance, in which the input side is connected to an AC or DC input, a PWM control circuit is connected to the buck converter switch, a capacitor filters the output voltage ripple and an output voltage/current control circuit provides feedback signal to the PWM control circuit. The present invention has such features of less component number, low total cost, high reliability, and better line/load regulation.

摘要翻译： 本发明主要公开了可用于LED照明和其他非隔离电源设备的低功率非隔离驱动器，其中输入侧连接到AC或DC输入，PWM控制电路连接到降压 转换器开关，电容滤波输出电压纹波，输出电压/电流控制电路向PWM控制电路提供反馈信号。 本发明具有组件数少，总成本低，可靠性高，线路/负载调节更好的特点。

公开(公告)号：US20110019445A1

公开(公告)日：2011-01-27

申请号：US12559098

申请日：2009-09-14

申请人： Quanqing Wu ,  Kwok Pun Ho

发明人： Quanqing Wu ,  Kwok Pun Ho

IPC分类号： H02M1/00

CPC分类号： H02M3/33507

摘要： A power converter includes a primary winding for providing a primary current, a secondary winding for providing an output current and an output voltage, and a current sense node for receiving a current sense signal related to the primary current. The power converter also includes a control circuit configured to limit the current sense signal to be lower than or equal to a predetermined reference peak current. Moreover, the power converter includes a first circuit configured to modify the current sense signal using a first signal related to the output voltage to cause an variation in the output current.

摘要翻译： 功率转换器包括用于提供初级电流的初级绕组，用于提供输出电流的次级绕组和输出电压，以及用于接收与初级电流相关的电流感测信号的电流感测节点。 功率转换器还包括被配置为将电流感测信号限制为低于或等于预定参考峰值电流的控制电路。 此外，功率转换器包括第一电路，其被配置为使用与输出电压相关的第一信号来修改电流感测信号，以引起输出电流的变化。

公开(公告)号：US07864550B2

公开(公告)日：2011-01-04

申请号：US12265535

申请日：2008-11-05

申请人： Jian-Hua Duan ,  Rui-Xia Fei ,  Shao-Hua Fang ,  Qing-Hua Su

发明人： Jian-Hua Duan ,  Rui-Xia Fei ,  Shao-Hua Fang ,  Qing-Hua Su

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： A power adapter with voltage-stabilized compensation includes a pulse frequency modulation circuit to generate a driving pulse which has a variable OFF time interval to control power transformed and output by a transformer. The power adapter also has an ancillary coil to induce a feedback signal on the secondary coil of the transformer. The pulse frequency modulation circuit includes a time interval modulation unit to receive the feedback signal and a feedback compensation unit. The time interval modulation unit sets a level voltage compared with the feedback signal to generate a sample signal to modulate the OFF time interval. The feedback compensation unit provides a compensation signal to the time interval modulation unit to change the size of the feedback signal or sample signal thereby to compensate the voltage output from the secondary side.

摘要翻译： 具有电压稳定补偿的电源适配器包括脉冲频率调制电路，用于产生具有可变的关闭时间间隔的驱动脉冲，以控制由变压器变换和输出的功率。 电源适配器还具有辅助线圈以在变压器的次级线圈上感应反馈信号。 脉冲频率调制电路包括接收反馈信号的时间间隔调制单元和反馈补偿单元。 时间间隔调制单元设置与反馈信号相比的电平电压以产生采样信号以调制关断时间间隔。 反馈补偿单元向时间间隔调制单元提供补偿信号，以改变反馈信号或采样信号的大小，从而补偿从次级侧输出的电压。

公开(公告)号：US20100164581A1

公开(公告)日：2010-07-01

申请号：US12500923

申请日：2009-07-10

申请人： Zhihong Zhang ,  Xujiang Huang

发明人： Zhihong Zhang ,  Xujiang Huang

IPC分类号： H03K3/017

CPC分类号： H02P6/085 ,  F04D27/004 ,  H02P6/26 ,  H02P27/08

摘要： A pulse width modulated (PWM) controller has an input terminal for receiving a pulsed input signal having a first duty cycle, a power supply terminal for receiving a power supply voltage. a minimum duty cycle reference voltage signal, and a control circuit for providing a pulse-width-modulated (PWM) output signal having a second duty cycle related to the first duty cycle of the pulsed input signal. The PWM output control signal having a minimum duty cycle that is adjustable in response to a change in the power supply voltage. In an embodiment, the second duty cycle and the first duty cycle are correlated in a substantially linear relationship. In an embodiment, the PWM control circuit also has a triangle wave generation circuit for generating a triangle wave signal configured to oscillate between an upper limit voltage and a lower limit voltage, which are adjustable in response to a change in the power supply voltage.

摘要翻译： 脉冲宽度调制（PWM）控制器具有用于接收具有第一占空比的脉冲输入信号的输入端子，用于接收电源电压的电源端子。 最小占空比参考电压信号，以及用于提供具有与脉冲输入信号的第一占空比相关的第二占空比的脉冲宽度调制（PWM）输出信号的控制电路。 PWM输出控制信号具有响应于电源电压变化而可调节的最小占空比。 在一个实施例中，第二占空比和第一占空比以基本线性关系相关。 在一个实施例中，PWM控制电路还具有三角波产生电路，用于产生三角波信号，该三角波信号被配置为在上限电压和下限电压之间振荡，这可以响应于电源电压的变化而调节。