公开(公告)号：US20160079443A1

公开(公告)日：2016-03-17

申请号：US14526843

申请日：2014-10-29

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Chung-Yu Hung ,  Ching-Yao Yang ,  Tzu-Cheng Kao ,  Tsung-Yi Huang ,  Wu-Te Weng

IPC: H01L29/872 ,  H01L27/02

CPC classification number: H01L29/872 ,  H01L27/0248 ,  H01L29/0619 ,  H01L29/0646

Abstract: A JBS diode includes a silicon substrate, a first P doped region, a metal layer, a second P doped region, and a first N doped region. The silicon substrate includes an upper surface. An NBL is provided in the bottom of the silicon substrate. An N well is provided between the upper surface and the NBL. The first P doped region is arranged in the N well, and extending downward from the upper surface. The metal layer covers the upper surface, and located on a side of the first P doped region. The second P doped region is arranged in the N well, extending downward from the upper surface, and located at the other side of the first P doped region. The first N doped region is arranged in the N well, extending downward from the upper surface, and located at the other side of the first P doped region.

Abstract translation: JBS二极管包括硅衬底，第一P掺杂区，金属层，第二P掺杂区和第一N掺杂区。 硅衬底包括上表面。 在硅衬底的底部提供NBL。 在上表面和NBL之间设有一个N孔。 第一P掺杂区域布置在N阱中，并从上表面向下延伸。 金属层覆盖上表面，并且位于第一P掺杂区域的一侧。 第二P掺杂区域布置在N阱中，从上表面向下延伸，并且位于第一P掺杂区域的另一侧。 第一N掺杂区域布置在N阱中，从上表面向下延伸，并且位于第一P掺杂区域的另一侧。

公开(公告)号：US09276473B1

公开(公告)日：2016-03-01

申请号：US14591250

申请日：2015-01-07

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： An-Tung Chen ,  Li-Wen Fang ,  Chih-Hao Yang ,  Yu-Chiao Hsieh

IPC: G05F1/00 ,  H02M3/158

CPC classification number: H02M3/158 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0022 ,  Y02B70/1466

Abstract: A voltage converting controller is applied to a switching voltage converting circuit, in which the voltage converting controller periodically operates a high-side power switch and a low-side power switch in the switching voltage converting circuit with a high-side control signal and a low-side control signal, respectively, so as to convert an input voltage into an output voltage via an inductor. Defining an ideal duty cycle as the rating value of the output voltage divided by the value of the input voltage, when the ideal duty cycle is less than one threshold duty cycle, then the period of the high-side control signal is a constant; and when the ideal duty cycle is greater than the threshold duty cycle, the period of the high-side control signal and the period of the ideal duty cycle are positively correlated.

Abstract translation: 电压转换控制器被应用于开关电压转换电路，其中电压转换控制器周期性地操作具有高侧控制信号和低电平的开关电压转换电路中的高侧电源开关和低侧电源开关 控制信号，以便通过电感将输入电压转换为输出电压。 将理想的占空比定义为输出电压的额定值除以输入电压的值，当理想占空比小于一个阈值占空比时，则高边控制信号的周期为常数; 并且当理想占空比大于阈值占空比时，高侧控制信号的周期和理想占空比的周期是正相关的。

公开(公告)号：US20160049865A1

公开(公告)日：2016-02-18

申请号：US14809699

申请日：2015-07-27

Applicant: Richtek Technology Corp.

Inventor： Jyun-Che HO ,  Tzu-Chen LIN ,  Isaac Y. CHEN ,  Yi-Wei LEE

IPC: H02M1/36 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M2001/327

Abstract: A fast start-up circuit and a method of a flyback power supply utilize a charging current that is related to an input voltage of the flyback power supply to charge a control terminal of a power switch of the flyback power supply during a start-up mode. Accordingly, the power switch can be switched, and a supply voltage of the flyback power supply rises. When an output terminal of the flyback power supply occurs a short circuit, the fast start-up circuit and the method of the present invention will decrease a maximum of a current through the power switch, thereby avoiding that the power switch is overheating.

Abstract translation: 快速启动电路和回扫电源的方法利用与回扫电源的输入电压相关的充电电流，以在启动模式期间对反激式电源的电源开关的控制端子充电 。 因此，可以切换电源开关，并且回扫电源的电源电压上升。 当回扫电源的输出端子发生短路时，快速启动电路和本发明的方法将减小通过电源开关的电流的最大值，从而避免电源开关过热。

公开(公告)号：US20150372599A1

公开(公告)日：2015-12-24

申请号：US14475350

申请日：2014-09-02

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Chuh Ching Lee ,  Chien-Fu Tang ,  Chun Shih Huang

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0019

Abstract: A voltage converting controller. When output current increases from a first current value to a second current value, the voltage converting controller temporarily sets a control frequency to a maximum frequency value. After a period of time, the voltage converting controller sets the control frequency to a target control frequency corresponding to the second current value. And, when the output current increases from the first current value to the second current value, the voltage converting controller temporarily sets a secondary-side output voltage to an transient output value; and after a period of time, the voltage converting controller sets a steady state value of the secondary-side output voltage to an output voltage steady state value corresponding to the second current value.

Abstract translation: 电压转换控制器。 当输出电流从第一电流值增加到第二电流值时，电压转换控制器将控制频率暂时设定为最大频率值。 一段时间后，电压转换控制器将控制频率设定为与第二电流值对应的目标控制频率。 而且，当输出电流从第一电流值增加到第二电流值时，电压转换控制器暂时将次级侧输出电压设定为瞬态输出值; 并且经过一段时间后，电压转换控制器将次级侧输出电压的稳态值设定为对应于第二电流值的输出电压稳态值。

公开(公告)号：US09215771B2

公开(公告)日：2015-12-15

申请号：US13973681

申请日：2013-08-22

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hua Lin ,  Shui-Mu Lin

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0842

Abstract: A light emitting diode driver includes: a serial-to-parallel conversion unit converting, based on a reference clock signal, a serial input signal carrying a number (N) of M-bit gray codes into a parallel input signal carrying the M-bit gray codes; a counting unit counting an output control signal to output a counting value; a data buffer unit storing, based on a latch signal, the M-bit gray codes carried by the parallel input signal, and outputting, based on the counting value and the M-bit gray codes, an N-bit signal consisting of N bits, each of which is an ith one of M bits of a respective M-bit gray code, where i is associated with the counting value; and an output unit generating a number (N) of driving current signals based on at least the N-bit signal.

Abstract translation: 发光二极管驱动器包括：串行到并行转换单元，将基于参考时钟信号的携带M位灰度代码的（N）个M位的串行输入信号转换为携带M位的并行输入信号 灰色代码; 计数单元，对输出控制信号进行计数以输出计数值; 数据缓冲器单元，基于锁存信号存储并行输入信号所携带的M位灰色代码，并根据计数值和M位灰度代码输出由N位组成的N位信号 ，其中每个是相应M位灰度码的M位中的第i个，其中i与计数值相关联; 以及输出单元，至少基于N位信号生成数量（N）个驱动电流信号。

公开(公告)号：US20150249392A1

公开(公告)日：2015-09-03

申请号：US14713654

申请日：2015-05-15

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M1/36

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

Abstract translation: 开关电源转换装置包括电压转换模块，检测单元和开关信号产生单元。 电压转换模块将输入电压转换为与次级侧电流相关联的输出电压，该二次侧电流流过变压器的次级绕组并且基于开关信号产生。 检测单元基于输出电压和预定参考电压产生检测信号。 切换信号生成部基于检测信号和调整信号生成切换信号，使得在开关电力转换装置的起动期间次级侧电流逐渐增大。

公开(公告)号：US09093914B2

公开(公告)日：2015-07-28

申请号：US13871286

申请日：2013-04-26

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Pei Kai Tseng ,  Chien Fu Tang ,  Isaac Y. Chen

IPC: H02J7/00 ,  H02M1/36 ,  H02M3/07 ,  H02J7/34

CPC classification number: H02M1/36 ,  H02J7/0016 ,  H02J7/345 ,  H02M3/07

Abstract: A bootstrap circuit includes: a charging voltage source; a charging diode, having an anode coupled to the charging voltage source; a high-voltage transistor, having a control terminal defined as a first connecting node and a channel coupled between a cathode of the charging diode and a bootstrap capacitor; a logic control circuit, having a first and a second logic outputs, and a logic input for receiving a charging command; a high-voltage control transistor, having a control terminal defined as a second connecting node and a channel coupled between charging voltage source and the first connecting node; a cut-off resistor, coupled between the first and the second connecting nodes; a charging control transistor, having a channel coupled between the second connecting node and a ground terminal, and a control terminal coupled to the second logic output; a control capacitor, coupled between the first connecting node and the first logic output.

Abstract translation: 引导电路包括：充电电压源; 充电二极管，具有耦合到所述充电电压源的阳极; 具有被定义为第一连接节点的控制端子和耦合在充电二极管的阴极和自举电容器之间的通道的高压晶体管; 具有第一和第二逻辑输出的逻辑控制电路和用于接收充电命令的逻辑输入; 高压控制晶体管，其具有被定义为第二连接节点的控制端子和耦合在充电电压源与第一连接节点之间的通道; 截止电阻器，耦合在所述第一和第二连接节点之间; 具有耦合在第二连接节点和接地端子之间的通道的充电控制晶体管和耦合到第二逻辑输出的控制端子; 耦合在第一连接节点和第一逻辑输出之间的控制电容器。

公开(公告)号：US20150137611A1

公开(公告)日：2015-05-21

申请号：US14258708

申请日：2014-04-22

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Wei-Jen Huang ,  Shui-Mu Lin

IPC: H02J5/00 ,  H02M7/04 ,  H02J7/02

CPC classification number: H02J50/12 ,  H02J5/005 ,  H02J7/025 ,  H02M7/217

Abstract: A power management unit, adapted to a wireless power system, includes: a rectifier, converts an AC power received by an input port thereof to a direct-current (DC) voltage outputted by a rectifying output terminal thereof; a first switch, wherein a first protecting capacitor is coupled between one terminal of the input port and a channel thereof; a second switch, wherein a second protecting capacitor is coupled between the other terminal of the input port and a channel thereof; a reference voltage terminal, for providing a reference voltage; and, a comparator, including two input terminals coupled to the rectifying output terminal and the reference voltage terminal respectively, and including an output terminal coupled to both the control terminals of the first switch and the second switch.

Abstract translation: 一种适用于无线电力系统的电力管理单元，包括：整流器，将由其输入端口接收的交流电力转换成由其整流输出端子输出的直流（DC）电压; 第一开关，其中第一保护电容器耦合在所述输入端口的一个端子和其沟道之间; 第二开关，其中第二保护电容器耦合在所述输入端口的另一端和其通道之间; 参考电压端子，用于提供参考电压; 以及包括分别耦合到整流输出端子和参考电压端子的两个输入端子的比较器，并且包括耦合到第一开关和第二开关的两个控制端子的输出端子。

公开(公告)号：US20150130523A1

公开(公告)日：2015-05-14

申请号：US14559579

申请日：2014-12-03

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： CHIEN-FU TANG ,  ISAAC Y. CHEN

IPC: H03K3/84

CPC classification number: H03K3/84 ,  G06F1/04 ,  H02M1/44 ,  H03B29/00 ,  H03K17/16

Abstract: An oscillator generates a clock signal according to a voltage, a current and a capacitance, and a frequency jitter circuit and method use a random number to modulate the voltage, the current or the capacitance, or a count value to modulate the capacitance, to jitter the frequency of the clock signal.

Abstract translation: 振荡器根据电压，电流和电容产生时钟信号，并且频率抖动电路和方法使用随机数来调制电压，电流或电容或计数值以调制电容到抖动 时钟信号的频率。

公开(公告)号：US20140354163A1

公开(公告)日：2014-12-04

申请号：US14066268

申请日：2013-10-29

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chih-Feng Huang ,  Kuo-Chin Chiu

IPC: H05B33/08

CPC classification number: H05B33/083

Abstract: An LED driving device includes: a rectifying circuit for outputting a DC voltage to a string of M LED units; (M−1) first switching circuits each coupled between a corresponding one of first to (M−1)th LED units and ground; and a second switching circuit coupled between an Mth LED unit and ground. When the DC voltage is sufficient to turn on first to kth LED units, where 1≦k≦M, the kth LED unit is coupled to ground through first and second conductive paths provided by a resistor unit, and a corresponding first switching circuit or the second switching circuit, and each of the first to (k−1)th LED units is coupled to ground through a third conductive path provided by a corresponding first switching circuit and the resistor unit.

Abstract translation: 一种LED驱动装置，包括：整流电路，用于向一串M LED单元输出DC电压; （M-1）个第一开关电路，每个第一开关电路分别耦合在第一至第（M-1）个LED单元中的相应一个LED单元和地之间; 以及耦合在第M个LED单元和地之间的第二开关电路。 当直流电压足以使第一至第九LED单元接通时，其中第一LED单元通过由电阻器单元提供的第一和第二导电路径以及相应的第一开关电路或 第二开关电路，并且第一至第（k-1）个LED单元中的每一个通过由相应的第一开关电路和电阻器单元提供的第三导电路径耦合到地。