公开(公告)号：US20150009721A1

公开(公告)日：2015-01-08

申请号：US14073511

申请日：2013-11-06

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Chun-Shih Huang ,  Hsin-Hsiung Wang

IPC: H02M3/335

CPC classification number: H02M3/33507

Abstract: A voltage converter controller and a voltage converter circuit, either of which includes a voltage-drop compensating circuit for compensating a voltage drop between an output voltage and a load. The voltage-drop compensating circuit includes a trans-conductance stage and a squarer. The trans-conductance stage outputs a compensating sink current to a voltage dividing terminal of the output voltage and outputs a compensating source current to a reference voltage terminal of an error amplifier. An input terminal of the squarer is coupled to an output terminal of the error amplifier. An output terminal of the squarer is coupled to an input terminal of the trans-conductance stage.

Abstract translation: 一种电压转换器控制器和电压转换器电路，其中之一包括用于补偿输出电压和负载之间的电压降的电压降补偿电路。 电压降补偿电路包括跨导级和平方。 跨导级将补偿灌电流输出到输出电压的分压端，并将补偿源电流输出到误差放大器的参考电压端。 平方器的输入端耦合到误差放大器的输出端。 平方的输出端耦合到跨导级的输入端。

公开(公告)号：US20150009719A1

公开(公告)日：2015-01-08

申请号：US14014642

申请日：2013-08-30

Applicant: RICHTEK TECHNOLOGY CORP.

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

IPC: H02M3/335

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：US20140320216A1

公开(公告)日：2014-10-30

申请号：US14022547

申请日：2013-09-10

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chih-Hsien WANG

IPC: H03L7/08

CPC classification number: H03L7/00

Abstract: An oscillator circuit includes: a switched-capacitor filter filtering a voltage at a common node between a current generating unit and a frequency-controlled resistor so as to generate a filtered voltage; an amplifier generating a control voltage based on the filtered voltage and a voltage at a common node between the current generating unit and a reference resistor; a voltage-controlled oscillator generating an oscillation signal based on the control voltage; and a control signal generating unit generating, based on the oscillation signal, a control input having a frequency proportional to that of the oscillation signal. The frequency-controlled resistor has a resistance variable according to the control input.

Abstract translation: 振荡电路包括：开关电容滤波器，对电流产生单元和频率控制电阻之间的公共节点的电压进行滤波，以产生滤波电压; 基于所述滤波电压产生控制电压的放大器和所述电流产生单元与参考电阻器之间的公共节点处的电压; 基于所述控制电压产生振荡信号的压控振荡器; 以及控制信号生成单元，其基于所述振荡信号生成具有与所述振荡信号的频率成比例的频率的控制输入。 频率控制电阻根据控制输入具有电阻变量。

公开(公告)号：US20140269840A1

公开(公告)日：2014-09-18

申请号：US14194673

申请日：2014-03-01

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Sheng-Fu Hsiao ,  Hung-Shou Nien ,  Kuang-Feng Li ,  Yu-Wei Chang

IPC: G01K7/16 ,  G01K7/34

CPC classification number: G01K7/16 ,  G01K2217/00

Abstract: A temperature detecting circuit and method thereof, adapted to a voltage converter circuit which includes a current detecting circuit having a detecting output port outputting a current detecting signal proportional to an output current of the voltage converter circuit, includes: a current signal processing unit, having a signal input port coupling to the detecting output port, a first detecting output port generating a first processing signal with a first temperature coefficient, a second detecting output port generating a second processing signal with a second temperature coefficient, wherein the first and the second processing signals are proportional to the current detecting signal; and, a temperature calculating unit, receiving the first and the second processing signals and performing calculation to derive a temperature value.

Abstract translation: 一种温度检测电路及其方法，适用于包括电流检测电路的电压转换器电路，所述电流检测电路具有输出与所述电压转换器电路的输出电流成比例的电流检测信号的检测输出端口，所述电流检测电路包括：电流信号处理单元， 耦合到检测输出端口的信号输入端口，产生具有第一温度系数的第一处理信号的第一检测输出端口，产生具有第二温度系数的第二处理信号的第二检测输出端口，其中第一和第二处理 信号与电流检测信号成比例; 以及温度计算单元，接收第一处理信号和第二处理信号，并进行计算以导出温度值。

公开(公告)号：US20140192564A1

公开(公告)日：2014-07-10

申请号：US13896631

申请日：2013-05-17

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Fu TANG ,  Tzu-Chen LIN ,  Isaac Y. CHEN

IPC: H02M7/217

CPC classification number: H02M3/33523 ,  H02M1/36 ,  H02M3/33592 ,  Y02B70/1475

Abstract: A switching power converting apparatus is capable of converting an input voltage to an output voltage, and includes a transformer, a primary side control module, and a secondary side control module. The secondary side control module utilizes voltage clamping techniques or current-drawing techniques to stop self-excited conversion from the input voltage to the output voltage when the output voltage is greater than a predetermined target voltage, or utilizes a non-self-excited conversion architecture.

Abstract translation: 开关电力转换装置能够将输入电压转换为输出电压，并且包括变压器，初级侧控制模块和次级侧控制模块。 次级侧控制模块利用电压钳位技术或电流绘制技术在输出电压大于预定目标电压时停止从输入电压到输出电压的自激变换，或利用非自激转换结构 。

公开(公告)号：US20140139043A1

公开(公告)日：2014-05-22

申请号：US14165406

申请日：2014-01-27

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chi-Hua LIN ,  Chien-Fu TANG ,  Isaac Y. CHEN ,  An-Tung CHEN

IPC: H02B1/24

CPC classification number: H02B1/24 ,  H04R3/007 ,  Y10T307/74 ,  Y10T307/766

Abstract: A power off delay circuit includes a switch connected between an external power input terminal and an internal power supply terminal, a capacitor connected to the internal power supply terminal, and a hysteresis comparator to switch the switch according to the voltages of the external power input terminal and the internal power supply terminal. During on-time of the switch, the external power input terminal is connected to the internal power supply terminal and the capacitor can be charged by the external power source. When the switch is off, the capacitor provides electric power for an internal circuit. Application of the power off delay circuit to an audio system may eliminate the turn-off pops of the audio system.

Abstract translation: 断电延迟电路包括连接在外部电源输入端子和内部电源端子之间的开关，连接到内部电源端子的电容器和滞后比较器，用于根据外部电力输入端子的电压来切换开关 和内部电源端子。 在接通时，外部电源输入端子连接到内部电源端子，电容器可以通过外部电源充电。 当开关关闭时，电容为内部电路提供电力。 将断电延迟电路应用于音频系统可以消除音频系统的关闭声音。

公开(公告)号：US20130169370A1

公开(公告)日：2013-07-04

申请号：US13772539

申请日：2013-02-21

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Fu TANG ,  Isaac Y. CHEN

IPC: H03B29/00

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.

公开(公告)号：US20130106466A1

公开(公告)日：2013-05-02

申请号：US13665631

申请日：2012-10-31

Applicant: Richtek Technology Corp.

Inventor： Pei-Kai TSENG ,  Chien-Fu TANG ,  Issac Y. CHEN ,  Jyun-Che HO

IPC: H03K5/1536

CPC classification number: H02M1/38 ,  G01R19/0084 ,  G01R31/40 ,  H03K5/1536 ,  H05B41/2981

Abstract: A high voltage H-bridge driver circuit has a high voltage terminal and a floating node to be connected with a high side switch therebetween. When turning on the high side switch, a high voltage offset detection circuit detects a voltage related to the voltage at the floating node for triggering a zero voltage switching signal.

Abstract translation: 高电压H桥驱动器电路具有高电压端子和浮动节点，以与它们之间的高侧开关连接。 当开启高压侧开关时，高压偏移检测电路检测与浮动节点处的电压相关的电压，以触发零电压切换信号。

公开(公告)号：US20040008096A1

公开(公告)日：2004-01-15

申请号：US10342183

申请日：2003-01-15

Applicant: RichTek Technology Corp.

Inventor： Jing-Meng Liu ,  Kent Hwang ,  Chao-Hsuan Chuang ,  Cheng-Hsuan Fan

IPC: H03H011/00

CPC classification number: H03H11/485 ,  H03H11/48

Abstract: An inductor equivalent circuit is disclosed. The circuit comprises a reference current source, a first current mirror, a second current mirror, two operational amplifiers OP1 and OP2, a capacitor, a first transistor, a second transistor, a mirror resistor set, and a bypass current source in parallel with the capacitor. An input signal is through OP1 and second transistor to control the reference current source. The first mirror current is then feed-back a signal to the first transistor through an OP2. The current signal makes the drain current of the first transistor lags the input voltage signal by 90null due to the capacitor coupled with the first mirror current source. The mirror resistor set can be resistors having one common terminal grounded, and other terminals each, respectively, coupled with the first and the second transistor and the capacitor, or can be composed of transistors and all of them with gate property biased so that the transistors in the mirror resistor set are operated in an ohmic region. The second mirror current provides an output current of the inductor equivalent circuit for next cascade stage.

公开(公告)号：US20030141923A1

公开(公告)日：2003-07-31

申请号：US10229160

申请日：2002-08-28

Applicant: Richtek Technology Corp.

Inventor： Jing-Meng Liu ,  Kent Hwang ,  Chao-Hsuan Chuang ,  Cheng-Hsuan Fan

IPC: G05F001/10

CPC classification number: G05F3/262

Abstract: A resistance adjustable of resistance mirror circuit comprises: a master resistor R0, a reference current source terminal providing a current value I0 through the master resistor R0 to ground; a first transistor; a current mirror source terminal providing a current value nI0, through the first transistor to ground; an operational amplifier having a positive terminal connecting to a drain of the first transistor, a negative terminal connecting to the other terminal of the master resistor R0, and an output terminal connecting to a gate of the first transistor; a mirror resistor set composed of a plurality of transistors in parallel each other and having their source electrode connecting to ground. Each transistor of the mirror resistor set has a ratio of channel width over channel length being m-fold of that of the first transistor, where m, n is any positive numbers. Since gates of the transistors connect to the output terminal of the operational amplifier, each of the transistors therefore has an equivalent resistance Reqnull(1/nm)R0.

Abstract translation: 电阻镜电路的电阻可调，包括：主电阻R0，一个参考电流源极端子，通过主电阻器R0接地提供电流值I0; 第一晶体管; 电流镜源端子，通过第一晶体管接地提供电流值nI0; 具有连接到第一晶体管的漏极的正端子的运算放大器，连接到主电阻器R0的另一端子的负极端子和连接到第一晶体管的栅极的输出端子; 由多个彼此并联的晶体管组成并且其源电极连接到地的镜电阻器组。 镜面电阻器组的每个晶体管的沟道宽度与沟道长度的比率与第一晶体管的沟道长度的m倍成正比，其中m，n是任何正数。 由于晶体管的栅极连接到运算放大器的输出端，因此每个晶体管具有等效电阻Req =（1 / nm）R0。