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：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。