公开(公告)号：US20140118029A1

公开(公告)日：2014-05-01

申请号：US14062192

申请日：2013-10-24

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 half-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: 高电压半桥驱动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：US20250158513A1

公开(公告)日：2025-05-15

申请号：US18641461

申请日：2024-04-22

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Kuo-Chi Liu ,  Ta-Yung Yang ,  Chang-Yu Ho

IPC: H02M1/36 ,  H02M1/08 ,  H02M1/32 ,  H02M3/07 ,  H02M3/158

Abstract: A pre-bias voltage control circuit includes a flying capacitor, a voltage sensor, and a voltage controlled current source. The voltage sensor is used to generate a sensed capacitor voltage according to a capacitor voltage across the flying capacitor, and includes an inverting input terminal coupled to the flying capacitor, a non-inverting input terminal coupled to the flying capacitor, and an output terminal for outputting the sensed capacitor voltage. The voltage controlled current source is used to charge and discharge the flying capacitor, and includes a reference terminal for receiving a reference voltage, an input terminal coupled to the output terminal of the voltage sensor, a current output terminal coupled to the flying capacitor, and a current return terminal coupled to the flying capacitor. The voltage controlled current source generates a source current to charge the flying capacitor when the sensed capacitor voltage falls below the reference voltage.

公开(公告)号：US20250067269A1

公开(公告)日：2025-02-27

申请号：US18395638

申请日：2023-12-25

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Ta-Yung Yang ,  I-Chi Lin ,  Chang-Yi Lin ,  Shih-Jen Yang

IPC: F04D27/00 ,  H02P8/36

Abstract: A method for predicting failure of a cooling fan includes driving a motor of the cooling fan based on a control speed, generating a first speed according to an average speed of the motor, generating a first current according to an average current of the motor, retrieving a system coefficient from a memory, generating a current threshold according to the first speed and the system coefficient, and triggering an alarm signal if the first current exceeds the current threshold by a threshold amount.

公开(公告)号：US20230336075A1

公开(公告)日：2023-10-19

申请号：US18131361

申请日：2023-04-05

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Kuo-Chi Liu ,  Ta-Yung Yang ,  Wei-Hsu Chang

IPC: H02M3/07 ,  H02M1/00

CPC classification number: H02M3/07 ,  H02M1/0058 ,  H02M1/0012 ,  H03K19/20

Abstract: A power converter includes first to fourth switches, a flying capacitor, an inductor, an output capacitor and a control circuit. The first to fourth switches are sequentially coupled in cascode. The first switch receives an input voltage, and the fourth switch is further coupled to a ground terminal. The flying capacitor is coupled across the second switch and the third switch, the inductor is coupled to the second switch, the third switch and the output capacitor. The output capacitor is used to output an output voltage. In a non-regulated mode, the control circuit switches the first to fourth switches according to a resonant frequency. In a regulated mode, the control circuit switches the first to fourth switches according to a regulated frequency exceeding the resonant frequency. When the flying capacitor is coupled to the inductor, the flying capacitor and the inductor can form a resonant circuit having the resonant frequency.

公开(公告)号：US10014723B2

公开(公告)日：2018-07-03

申请号：US14258708

申请日：2014-04-22

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Wei-Jen Huang ,  Shui-Mu Lin

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H02J50/12 ,  H02J5/00 ,  H02J7/02 ,  H02M7/217

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.

公开(公告)号：US09647531B2

公开(公告)日：2017-05-09

申请号：US14526187

申请日：2014-10-28

Applicant: Richtek Technology Corp.

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

IPC: H02M1/36 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M3/33523 ,  H02M3/33553

Abstract: A soft-start switching power converter includes a voltage converting circuit and a soft-start circuit. The voltage converting circuit includes a transformer, and a first switch which includes a first terminal connected to the transformer, a second terminal providing a trigger signal, and a control terminal receiving a control signal, and which is controlled to switch between conduction and nonconduction, such that the transformer generates a feedback voltage. The soft-start circuit receives the trigger signal, generates the control signal according to the trigger signal, and determines whether or not to clamp the control signal at a preset voltage level based on the trigger signal.

公开(公告)号：US09356518B2

公开(公告)日：2016-05-31

申请号：US14529111

申请日：2014-10-30

Applicant: RICHTEK TECHNOLOGY CORP

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

IPC: H02M3/158 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/1584 ,  H02M2001/0045

Abstract: An over-voltage protection circuit is applied to a switching voltage converting circuit. The switching voltage converting circuit manipulates an upper bridge power switch in the circuit, so as to convert an input voltage into an output voltage by an inductor. A channel of the upper bridge power switch and the inductor are coupled to a phase end. The over-voltage protection circuit includes: a comparator, coupled to the switching voltage converting circuit, wherein when a voltage of the phase end is higher than a voltage limiting threshold, an output end of the comparator outputs a first voltage level; and a pulse width detection unit, coupled to the output end of the comparator, wherein when the output end of the comparator remains the first voltage level for a time period longer than a protection period, the pulse width detection unit outputs an over-voltage protection activation signal.

Abstract translation: 过电压保护电路被施加到开关电压转换电路。 开关电压转换电路操纵电路中的上桥式电源开关，以便通过电感将输入电压转换为输出电压。 上桥电源开关和电感器的通道耦合到相端。 所述过电压保护电路包括：比较器，耦合到所述开关电压转换电路，其中当所述相位端的电压高于电压限制阈值时，所述比较器的输出端输出第一电压电平; 以及脉冲宽度检测单元，其连接到所述比较器的输出端，其中当所述比较器的输出端在比保护周期长的时间段内保持第一电压电平时，所述脉冲宽度检测单元输出过电压保护 激活信号。

公开(公告)号：US09263940B2

公开(公告)日：2016-02-16

申请号：US14075717

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M3/335 ,  H02M1/42

CPC classification number: H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: A power converter includes a rectifier and a power factor corrector. The rectifier is to be coupled to an alternating current power source and is configured to output a rectified signal. The power factor corrector includes a correcting circuit and a control circuit. The correcting circuit receives the rectified signal and is configured to generate an output voltage based on the rectified signal and a driving signal. The control circuit is configured to generate a first to-be-compared signal based on the rectified signal, to generate a second to-be-compared signal based on the output voltage, to compare the first and second to-be-compared signals, and to generate the driving signal based on a result of comparison performed thereby.

Abstract translation: 功率转换器包括整流器和功率因数校正器。 整流器被耦合到交流电源，并且被配置为输出整流信号。 功率因数校正器包括校正电路和控制电路。 校正电路接收经整流的信号，并且被配置为基于整流信号和驱动信号产生输出电压。 控制电路被配置为基于整流信号产生第一待比较信号，以基于输出电压产生第二待比较信号，以比较第一和第二待比较信号， 并且基于由此执行的比较结果来产生驱动信号。

公开(公告)号：US09203319B2

公开(公告)日：2015-12-01

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 ,  H02M3/36

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。 开关信号生成单元根据检测信号和调整信号生成开关信号，使得在开关电力转换装置的启动期间次级侧电流逐渐增加。

公开(公告)号：US20150142348A1

公开(公告)日：2015-05-21

申请号：US14195557

申请日：2014-03-03

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Wei-Jen Huang ,  Shui-Mu Lin

IPC: G01R21/133 ,  G01V3/00

CPC classification number: G01R21/133 ,  G01V3/00 ,  H02J5/005 ,  H02J7/025 ,  H02J17/00 ,  H02J50/10 ,  H02J50/60

Abstract: A power calculating method, adapted to a wireless power system, includes the following steps: first, multi-sampling input or output current of a regulator in the power receiving end, and performing root-men-square calculation accordingly to derive a current RMS value; second, multi-sampling input or output voltage of the regulator, and performing a root-men-square calculation accordingly to derive a voltage RMS value; third, multiplying the voltage RMS value to the current RMS value and a cosine of an angle to derive a regulating power value; fourth, dividing the regulating power value by a power efficiency value to derive a receiving power value; finally, transmitting the receiving power value to a power transmitting end of the wireless power system for performing foreign object detection.

Abstract translation: 一种适用于无线电力系统的功率计算方法，包括以下步骤：首先，对受电端的稳压器的多采样输入或输出电流进行相应的平方根计算，得出电流RMS值 ; 第二，调节器的多采样输入或输出电压，并且相应地执行根平均计算以导出电压RMS值; 第三，将电压RMS值乘以电流RMS值和角度的余弦以导出调节功率值; 第四，将调节功率值除以功率效率值以得到接收功率值; 最后，将接收功率值发送到用于进行异物检测的无线电力系统的发送端。