公开(公告)号：US09655185B2

公开(公告)日：2017-05-16

申请号：US14920240

申请日：2015-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Jiun-Hung Pan ,  Tong-Cheng Jao ,  Yi-Wei Lee ,  Isaac Y. Chen

IPC: H05B33/08

CPC classification number: H05B33/083 ,  Y02B20/341 ,  Y02B20/345

Abstract: A linear LED driver comprises a transistor having an input terminal coupled to a LED. When the transistor is turned on, the LED is lighted. The linear LED driver further includes a protection circuit for judging whether an instant high voltage variation occurs or not according to at least one of the voltages of a control terminal and an output terminal of the transistor so as to achieve a protection function.

公开(公告)号：US20170108916A1

公开(公告)日：2017-04-20

申请号：US14885257

申请日：2015-10-16

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Hung-Chi Huang ,  Ying-Che Lo ,  Chih-Hsien Wang ,  Chih-Yi Hsiao ,  Lupu Liao

IPC: G06F1/32 ,  H04W52/02

CPC classification number: G06F1/3296 ,  G06F1/3206 ,  G06F1/325 ,  G06F1/3287 ,  H04W52/0251 ,  H04W52/0254 ,  Y02D10/171 ,  Y02D10/172 ,  Y02D70/00

Abstract: The present invention discloses an event detection method for waking up a portable electronic device and an action sensor using same. The event detection method includes the steps of: under a normal operation mode, sensing action events by the action sensor with a first data sensing frequency, wherein the action sensor operates by a normal current to detect the action events; entering into a sleep mode; under the sleep mode, detecting a wake-up event by the action sensor with a second data sensing frequency, wherein the action sensor operates by a weak current to detect the wake-up event, wherein the weak current is smaller than the normal current, and the second data sensing frequency is not higher than the first data sensing frequency; and returning to the normal operation mode when the wake-up event is detected.

公开(公告)号：US09614449B2

公开(公告)日：2017-04-04

申请号：US14879175

申请日：2015-10-09

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kuang-Fu Chang ,  Tzu-Chen Lin ,  Chien-Fu Tang

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M2001/0032

Abstract: The present invention provides a flyback power converter with a programmable output and a control circuit and a control method thereof. The flyback power converter converts an input voltage to a programmable output voltage according to a setting signal, wherein the programmable output voltage switches between different levels. The flyback power converter includes: a transformer circuit, a power switch circuit, a current sense circuit, an opto-coupler circuit, and a control circuit. The control circuit adaptively adjusts an operation signal according to a level of the programmable output voltage, to maintain a same or relatively higher operation frequency of the operation signal when the programmable output voltage switches to a relatively lower level, so as to maintain a phase margin while supplying the same output current.

公开(公告)号：US09563212B2

公开(公告)日：2017-02-07

申请号：US14668290

申请日：2015-03-25

Applicant: Richtek Technology Corporation

Inventor： Yu-Nung Tsai

IPC: H02M3/156 ,  G05F1/46

CPC classification number: G05F1/46 ,  H02M3/156

Abstract: A control circuit includes: a comparing circuit, having a first input terminal and second input terminal, configured to operably generate a comparison signal according signals received by the first and second input terminals, wherein the first input terminal is utilized for coupling with a reference signal and the second input terminal is utilized for coupling with a feedback signal; a periodic signal generating circuit configured to operably generate a periodic signal and to operably apply the periodic signal to the first input terminal or the second input terminal of the comparing circuit; and a control signal generating circuit configured to operably control an on time of a power switch according to the comparison signal.

Abstract translation: 控制电路包括：比较电路，具有第一输入端和第二输入端，被配置为根据由第一和第二输入端接收的信号可操作地产生比较信号，其中第一输入端用于与参考信号 并且第二输入端用于与反馈信号耦合; 周期性信号发生电路，被配置为可操作地产生周期性信号并将周期性信号可操作地应用于比较电路的第一输入端或第二输入端; 以及控制信号生成电路，被配置为根据比较信号可操作地控制电源开关的接通时间。

公开(公告)号：US20160380093A1

公开(公告)日：2016-12-29

申请号：US15260599

申请日：2016-09-09

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Yi Huang ,  Chien-Wei Chiu

IPC: H01L29/778 ,  H01L29/20 ,  H01L29/10 ,  H01L23/535 ,  H01L29/08 ,  H01L29/66 ,  H01L29/205

CPC classification number: H01L29/7787 ,  H01L23/481 ,  H01L29/0817 ,  H01L29/0821 ,  H01L29/0843 ,  H01L29/1004 ,  H01L29/2003 ,  H01L29/205 ,  H01L29/41708 ,  H01L29/4175 ,  H01L29/66212 ,  H01L29/66272 ,  H01L29/6631 ,  H01L29/66318 ,  H01L29/66333 ,  H01L29/66462 ,  H01L29/732 ,  H01L29/7395 ,  H01L29/7786 ,  H01L29/7788 ,  H01L29/872 ,  H01L2924/0002 ,  H01L2924/00

Abstract: The present invention discloses a vertical semiconductor device and a manufacturing method thereof. The vertical semiconductor device includes: a substrate having a first surface and a second surface, the substrate including a conductive array formed by multiple conductive plugs through the substrate; a semiconductor layer formed on the first surface, the semiconductor layer having a third surface and a fourth surface, wherein the fourth surface faces the first surface; a first electrode formed on the third surface; and a second electrode formed on the second surface for electrically connecting to the conductive array.

Abstract translation: 本发明公开了一种立式半导体器件及其制造方法。 所述垂直半导体器件包括：具有第一表面和第二表面的衬底，所述衬底包括由穿过所述衬底的多个导电插塞形成的导电阵列; 形成在所述第一表面上的半导体层，所述半导体层具有第三表面和第四表面，其中所述第四表面面向所述第一表面; 形成在第三表面上的第一电极; 以及形成在所述第二表面上用于电连接到所述导电阵列的第二电极。

公开(公告)号：US20160336808A1

公开(公告)日：2016-11-17

申请号：US15144553

申请日：2016-05-02

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kuo-Chi Liu ,  Wei-Hsin Wei

IPC: H02J50/12 ,  H02M7/219

CPC classification number: H02J50/12 ,  H02M7/217 ,  H02M7/219 ,  Y02B70/1441

Abstract: The present invention provides a resonant wireless power receiver circuit, including: a resonant circuit for receiving a wireless power to generate an AC resonant signal; a switch controlled rectifier circuit which includes a multi-mode switch circuit, for rectifying the AC resonant signal into a rectifier output signal to drive a load, wherein the multi-mode switch circuit includes at least one multi-mode switch; and a feedback control circuit for generating a switch control signal according to a feedback signal related to the rectifier output signal to control the at least one multi-mode switch such that it operates at least in a Resonance Short Circuit Operation to limit the rectifier output signal or to regulate the rectifier output signal. In the Resonance Short Circuit Operation, a positive resonant output node and a negative resonant output node are short-circuited by the multi-mode switch circuit.

Abstract translation: 本发明提供一种谐振无线电力接收电路，包括：谐振电路，用于接收无线电力以产生AC谐振信号; 开关控制整流电路，其包括多模开关电路，用于将所述AC谐振信号整流为整流器输出信号以驱动负载，其中所述多模开关电路包括至少一个多模开关; 以及反馈控制电路，用于根据与整流器输出信号相关的反馈信号产生开关控制信号，以控制至少一个多模开关，使得其至少在谐振短路操作中操作以限制整流器输出信号 或调节整流器输出信号。 在谐振短路工作中，正谐振输出节点和负谐振输出节点由多模开关电路短路。

公开(公告)号：US20160329730A1

公开(公告)日：2016-11-10

申请号：US15147056

申请日：2016-05-05

Applicant: Richtek Technology Corporation

Inventor： Yi-Min SHIU ,  Yu-Chang CHEN ,  Chih-Wei CHI ,  Chen-Hui CHAN

IPC: H02J7/00

CPC classification number: H02J7/0052 ,  H02J7/0004 ,  H02J7/0011 ,  H02J7/0021 ,  H02J7/0029 ,  H02J7/0031 ,  H02J7/0045 ,  H02J7/0047 ,  H02J7/007 ,  H02J7/027 ,  H02J7/045 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/0096

Abstract: A mobile device charging system includes a mobile charger and a mobile device. The mobile charger includes: an adaptive power converter for receiving data signals and generating a DC signal; an output terminal; and a charging cable for transmitting the data signals and receiving the DC signal to provide an output signal at the output terminal. The mobile device includes: a device-side connector for receiving power transmitted from the output terminal; and a charging control circuit for generating and transmitting the data signals to the adaptive power converter through the device-side connector and the charging cable. The adaptive power converter adjusts the magnitude of the DC signal according to the data signals to control the voltage drop of the charging cable to be less than a predetermined threshold.

Abstract translation: 移动设备计费系统包括移动充电器和移动设备。 移动充电器包括：自适应功率转换器，用于接收数据信号并产生DC信号; 输出端子; 以及用于发送数据信号并接收DC信号以在输出端提供输出信号的充电电缆。 移动设备包括：用于接收从输出端发送的功率的设备侧连接器; 以及充电控制电路，用于通过设备侧连接器和充电电缆产生并发送数据信号到自适应功率转换器。 自适应功率转换器根据数据信号调整DC信号的幅度，以控制充电电缆的电压降小于预定阈值。

公开(公告)号：US20160315541A1

公开(公告)日：2016-10-27

申请号：US14695761

申请日：2015-04-24

Applicant: Richtek Technology Corporation

Inventor： Isaac Y. Chen

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02H3/027 ,  H02H7/1213 ,  H02M3/33523 ,  H02M2001/0032 ,  H02M2001/325 ,  Y02B70/16

Abstract: A feedback signal stabilized by a capacitor and related to an output voltage of a power converter is used to acquire the output power information of the power converter, and a control circuit uses a second clock not related to the switching frequency of the power converter to count a duration time of the feedback signal being higher than a threshold. When the duration time is higher than a preset time, an abnormal output power of the power converter is distinguished and the power converter will be turned off. The feedback signal will not vary severely even if the output terminal of the power converter is interfered, and the counted duration time will not be influenced when the switching frequency is changing caused by a load changing.

Abstract translation: 使用由电容器稳定并与功率转换器的输出电压相关的反馈信号来获取功率转换器的输出功率信息，并且控制电路使用与功率转换器的开关频率无关的第二时钟来计数 反馈信号的持续时间高于阈值。 当持续时间高于预设时间时，功率转换器的异常输出功率被区分，功率转换器将被关闭。 即使电源转换器的输出端子受到干扰，反馈信号也不会严重变化，而当负载变化导致开关频率变化时，计数持续时间不会受到影响。

公开(公告)号：US09451661B2

公开(公告)日：2016-09-20

申请号：US15018309

申请日：2016-02-08

Applicant: Richtek Technology Corporation

Inventor： Tong-Cheng Jao ,  Yi-Wei Lee ,  Jiun-Hung Pan ,  Isaac Y. Chen

IPC: G05F1/00 ,  H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/083

Abstract: A linear LED driver includes a voltage supply terminal providing a driving voltage, at least one first transistor, each of which has an input terminal coupled to a respective LED, and a bleeder circuit. When the voltage of the output terminal of each of the at least one first transistor is lower than a first threshold and a power voltage is higher than a second threshold, the bleeder circuit will generate a bleeder current to discharge the voltage supply terminal so as to prevent the LEDs from flickering. The bleeder circuit detects the voltage of the output terminal of each of the at least one first transistor. Therefore, whether the LEDs are lighted up can be confirmed so that the bleeder current can be provided at properly time point.

Abstract translation: 线性LED驱动器包括提供驱动电压的电压供应端子，至少一个第一晶体管，每个第一晶体管具有耦合到相应LED的输入端子和泄放电路。 当所述至少一个第一晶体管中的每一个的输出端子的电压低于第一阈值并且电源电压高于第二阈值时，所述泄放电路将产生泄放电流以对所述电压供应端子进行放电，以便 防止LED闪烁。 泄放电路检测至少一个第一晶体管中的每一个的输出端子的电压。 因此，可以确认LED是否点亮，从而可以在正确的时间点设置泄放电流。

公开(公告)号：US20160212821A1

公开(公告)日：2016-07-21

申请号：US14920240

申请日：2015-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： JIUN-HUNG PAN ,  TONG-CHENG JAO ,  YI-WEI LEE ,  ISAAC Y. CHEN

IPC: H05B33/08

CPC classification number: H05B33/083 ,  Y02B20/341 ,  Y02B20/345

Abstract: A linear LED driver comprises a transistor having an input terminal coupled to a LED. When the transistor is turned on, the LED is lighted. The linear LED driver further includes a protection circuit for judging whether an instant high voltage variation occurs or not according to at least one of the voltages of a control terminal and an output terminal of the transistor so as to achieve a protection function.

Abstract translation: 线性LED驱动器包括具有耦合到LED的输入端的晶体管。 当晶体管导通时，LED点亮。 线性LED驱动器还包括保护电路，用于根据晶体管的控制端子和输出端子的电压中的至少一个来判断是否发生瞬时高电压变化，以实现保护功能。