公开(公告)号：US11139670B2

公开(公告)日：2021-10-05

申请号：US16046979

申请日：2018-07-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kuo-Chi Liu ,  Chang-Yu Ho

IPC: H02J7/00 ,  H02J7/35 ,  G05F1/56 ,  H01M10/46

Abstract: A charger circuit with temperature compensation function includes: a power converter, an input voltage sense circuit, an output adjustment circuit and a charging control circuit. The power converter converts an input voltage supplied from a photovoltaic power module to an output voltage. The input voltage sense circuit generates a signal related to the input voltage according to the input voltage. The output adjustment circuit generates an output adjustment signal according to the signal related to the input voltage. The charging control circuit generates a control signal according to the output adjustment signal, thereby adjusting a level of an output current supplied from the power converter. When a level of the input voltage is smaller than a predetermined voltage threshold, the power converter decreases the output current.

公开(公告)号：US20210305414A1

公开(公告)日：2021-09-30

申请号：US17187540

申请日：2021-02-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chih-Feng Huang ,  Lung-Sheng Lin

IPC: H01L29/739 ,  H01L27/02 ,  H01L27/07 ,  H01L29/66

Abstract: A power device which is formed on a semiconductor substrate includes: a lateral insulated gate bipolar transistor (LIGBT), a PN diode and a clamp diode. The PN diode is connected in parallel to the LIGBT. The clamp diode has a clamp forward terminal and a clamp reverse terminal, which are electrically connected to a drain and a gate of the LIGBT, to clamp a gate voltage applied to the gate not to be higher than a predetermined voltage threshold.

公开(公告)号：US20210296989A1

公开(公告)日：2021-09-23

申请号：US17145402

申请日：2021-01-11

Applicant: Richtek Technology Corporation

Inventor： Yung-Jen Chen ,  Yu-Chieh Lin ,  Chia-Chi Liu ,  Fu-To Lin

IPC: H02M3/158 ,  H02M1/08 ,  G05F1/575 ,  G05F1/565

Abstract: A switching regulator which has load transient quick response ability includes at least one power stage circuit and a control circuit. The control circuit includes a pulse width modulation (PWM) signal generation circuit and a quick response (QR) signal generation circuit. The PWM signal generation circuit generates a PWM signal according to an output voltage and a QR signal, to control a power switch of the corresponding power stage circuit, thus converting an input voltage to the output voltage. The QR signal generation circuit includes a differentiator circuit and a comparison circuit. The differentiator circuit performs a differential operation on a voltage sensing signal related to the output voltage, to generate a differential signal. The comparison circuit compares the differential signal with a QR threshold signal, such that when the differential signal exceeds the QR signal, the PWM signal generation circuit performs a QR procedure.

公开(公告)号：US20210226530A1

公开(公告)日：2021-07-22

申请号：US17022167

申请日：2020-09-16

Applicant: Richtek Technology Corporation

Inventor： Shui-Mu Lin ,  Tsung-Wei Huang ,  Huan-Chien Yang ,  Yung-Chun Chuang

IPC: H02M3/07

Abstract: A switching power conversion circuit includes a conversion capacitor, a capacitive power conversion circuit, an inductor, an inductive power conversion circuit and a switching control circuit. The capacitive power conversion circuit includes plural switching devices for generating an intermediate voltage which is in a predetermined proportional relationship to the input voltage. The inductive power conversion circuit includes plural switching devices for converting the intermediate voltage to an output voltage. The plural switching devices of the capacitive power conversion circuit and the inductive power conversion circuit switch the conversion capacitor and the inductor periodically according to the duty ratio of the switching control signal generated by the switching control circuit. The capacitive power conversion circuit and the inductive power conversion circuit share one of the plural switching devices.

公开(公告)号：US20210126529A1

公开(公告)日：2021-04-29

申请号：US16884024

申请日：2020-05-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yu-Lung Hung ,  Hsing-Shen Huang

IPC: H02M3/156 ,  H02M1/08

Abstract: A power conversion apparatus includes: a power supply circuit, a load switch and a control circuit. The power supply circuit generates a first power. The load switch controls the power path from the power supply circuit to a load. The control circuit generates a switching control signal to control a conduction level of the load switch according to an enable signal. The control circuit controls a level of the switching control signal to soft start from a first level to a second level. During the soft start period, the switching control signal has plural waveform segments including a first waveform segment and a second waveform segment. A level variation speed of the first waveform segment is higher than a level variation speed of the second waveform segment. The first waveform segment level precedes the second waveform segment level.

公开(公告)号：US20210119438A1

公开(公告)日：2021-04-22

申请号：US15931187

申请日：2020-05-13

Applicant: Richtek Technology Corporation

Inventor： Yu-Jen Cheng ,  Chih-Wei Mu ,  Sheng-Tsung Chen ,  Chieh-Min Lo ,  Wei-Chung Chang

IPC: H02H3/26 ,  H02H1/00 ,  H03K19/0175

Abstract: An interface control circuit complying with an interface specification includes: an interface signal transceiver circuit and a protection circuit. The interface signal transceiver circuit is coupled to a first interface connection pin and a second interface connection pin of a first interface connector circuit. The interface signal transceiver circuit is for transmitting and/or receiving an interface signal according to the interface specification. When the interface signal transceiver circuit operates under a first state, the protection circuit determines whether a foreign object exists between the first interface connection pin and the second interface connection pin according to a voltage change or a current change at the second interface connection pin. Under the first state, the interface signal transceiver circuit generates a pull-up signal and a pull-down signal which are toggled with each other at the first interface connection pin.

公开(公告)号：US10980090B1

公开(公告)日：2021-04-13

申请号：US16850958

申请日：2020-04-16

Applicant: Richtek Technology Corporation

Inventor： Yu-Min Chen ,  Isaac Y. Chen ,  Leng-Nien Hsiu

IPC: H05B37/00 ,  H05B45/10 ,  H05B45/325 ,  H05B45/385 ,  H05B45/38 ,  H05B45/375

Abstract: AN LED driving apparatus includes a power stage circuit and a dimming control circuit. The power stage circuit drives an LED circuit. The dimming control circuit includes a duty ratio conversion circuit, a digital-to analog conversion (DAC) circuit, an error amplifier (EA) circuit and a modulation control circuit. The duty ratio conversion circuit converts a PWM dimming signal to a digital duty ratio signal. The DAC circuit converts the digital duty ratio signal to an analog reference signal. The EA circuit generates an error amplified signal according to a difference between the analog reference signal and an output current related signal. The modulation control circuit generates a PWM control signal according to the error amplified signal, to control the power switch, such that the output current relates to a dimming duty ratio, whereby the dimming control circuit dims the LED circuit according to the PWM dimming signal.

公开(公告)号：US20210075227A1

公开(公告)日：2021-03-11

申请号：US16850893

申请日：2020-04-16

Applicant: Richtek Technology Corporation

Inventor： Wei-Hsu Chang

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/48

Abstract: A battery module for use in a battery system is coupled with other battery modules in the battery system in daisy-chain configuration. And, the battery module communicates with other battery modules through the daisy chain according to a communication interface protocol which has a predetermined number of clock pulses. The battery module includes a battery unit and a battery control circuit. When the battery module operates in a bottom mode, the battery control circuit generates an upstream clock output signal which includes the predetermined number of clock pulses plus a number of inserted clock pulses, to compensate a clock difference caused by the propagation delay of the daisy chain, such that the battery module is able to synchronously receive a downstream data signal transmitted from the target module via the daisy chain as the battery module is transmitting an upstream clock output signal.

公开(公告)号：US10923589B2

公开(公告)日：2021-02-16

申请号：US16542268

申请日：2019-08-15

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Yi Huang ,  Kun-Huang Yu

IPC: H01L29/78 ,  H01L29/10 ,  H01L29/08 ,  H01L29/66 ,  H01L29/167 ,  H01L29/36 ,  H01L21/02 ,  H01L21/762 ,  H01L21/265

Abstract: A high voltage device includes: a crystalline silicon layer, a well, a body region, a gate, a source, and a drain. The body region has a P-type conductivity type, and is formed in the well. The gate is located on and in contact with the well. The source and the drain have an N-type conductivity type, and are located below, outside, and at different sides of the gate, and are located in the body region and the well respectively. An inverse region is defined in the body region between the source and the well, to serve as an inverse current channel in an ON operation. The inverse region includes a germanium distribution region which has a germanium atom concentration higher than 1*1013 atoms/cm2. Adrift region is defined in the well, between the body region and the drain, to serve as a drift current channel in an ON operation.

公开(公告)号：US10819166B2

公开(公告)日：2020-10-27

申请号：US16122988

申请日：2018-09-06

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kuo-Chi Liu

IPC: H02J50/90 ,  H02J50/12

Abstract: A wireless power transfer system includes: a transmitting side, which includes a resonant transmitting circuit, the resonant transmitting circuit including a transmitter coil; and a receiving side, which includes a resonant receiving circuit, the resonant receiving circuit including a receiver coil for performing induction with the transmitter coil to generate a resonant receiver voltage, wherein the transmitter adjusts a transmitter current of the resonant transmitting circuit according to the resonant receiver voltage such that the resonant receiver voltage is regulated to a target voltage level. The wireless power transfer system determines a shift distance from a present relative position to an optimal relative position according to the adjusted transmitter current of the resonant transmitting circuit.