公开(公告)号：US12199506B2

公开(公告)日：2025-01-14

申请号：US18312512

申请日：2023-05-04

Applicant: Richtek Technology Corporation

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

IPC: H02M3/07 ,  H02M1/00 ,  H02M3/158

Abstract: A switched capacitor voltage converter circuit for converting a first voltage to a second voltage includes: an output capacitor; a switched capacitor converter; and a control circuit. The switched capacitor converter includes: a switch circuit including fourth switches; an inductor coupled between the switch circuit and the output capacitor; and a flying capacitor coupled to the switch circuit, wherein the flying capacitor and the output capacitor constitute a voltage divider. The control circuit generates a PWM signal according to the second voltage and generates switch signals according to the PWM signal to control the switch circuit, so as to convert the first voltage to the second voltage. The control circuit decides whether the switched capacitor converter operates in a boundary conduction mode, a discontinuous conduction mode or a continuous conduction mode according to an output current or an output current related signal.

公开(公告)号：US12095359B2

公开(公告)日：2024-09-17

申请号：US17937337

申请日：2022-09-30

Applicant: Richtek Technology Corporation

Inventor： Wei-Hsu Chang

IPC: H02M1/42 ,  H02M7/04 ,  H03K5/1532 ,  H03M1/12

CPC classification number: H02M1/4258 ,  H02M7/04 ,  H03K5/1532 ,  H03M1/12

Abstract: A power factor correction converter includes a rectifier, a power factor correction controller, a power stage circuit, and a feedback circuit, wherein the power factor correction converter converts an AC voltage into an output voltage. The power factor correction controller includes an analog-to-digital converter, a digital peak-hold circuit, a reference voltage generator, an error amplifier, and a pulse-width modulation circuit, wherein the power factor correction controller generates a driving signal according to a rectification signal and a feedback signal. The digital peak-hold circuit includes a delay circuit, a digital rising detector, a tracking register, a digital falling detector, and a holding register, wherein the digital peak-hold circuit generates a peak signal according to a digital input signal.

公开(公告)号：US20240072633A1

公开(公告)日：2024-02-29

申请号：US18449182

申请日：2023-08-14

Applicant: Richtek Technology Corporation

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

IPC: H02M1/00 ,  H02M3/07

CPC classification number: H02M1/0058 ,  H02M1/0009 ,  H02M3/07

Abstract: The present invention provides a resonant switched capacitor voltage converter (RSCC), which is coupled to and operates synchronously with another RSCC. The RSCC includes: plural switches, a resonant inductor, a resonant capacitor, and a control circuit. The control circuit controls the switches, so that the resonant capacitor and the resonant inductor are connected in series to each other, to perform resonant operation in a switching period, thus converting an input voltage to an output voltage. The control circuit generates a zero current signal and a first synchronization signal when a resonant inductor current flowing through the resonant inductor is zero. The control circuit turns off at least one corresponding switch according to the zero current signal. The control circuit turns on at least one corresponding switch according to the zero-current signal and a second synchronization signal, so that the RSCC operates in synchronization with at least another RSCC.

公开(公告)号：US20220166339A1

公开(公告)日：2022-05-26

申请号：US17531792

申请日：2021-11-21

Applicant: Richtek Technology Corporation

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H02M7/04 ,  H02J7/00 ,  H02J7/02 ,  H02M1/00

Abstract: A power conversion circuit includes an inductive switching power converter and a capacitive switching power converter. The inductive switching power converter switches an inductor to converter a DC power to a first power. The capacitive switching power converter switches a conversion capacitor to convert the first power to a charging power for charging a battery. The inductive switching power converter and the capacitive switching power converter flexibly operate in and dynamically switch between a regulation mode, a bypass mode or a combination thereof according to a parameter of the DC power.

公开(公告)号：US11304272B2

公开(公告)日：2022-04-12

申请号：US16844947

申请日：2020-04-09

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Chang-Yu Wu

IPC: H05B45/10 ,  H05B47/19 ,  H05B45/375 ,  H05B45/382 ,  H05B45/38 ,  H05B45/385 ,  H05B45/3725 ,  H05B45/395

Abstract: A lighting system includes: a power supply circuit, an AC-DC converter circuit and a wireless communication module. The wireless communication module receives an external command from a wireless communication device and generates an adjustment command according to the received external command. The adjustment command includes a luminance adjustment command and a driving power control command. The power supply circuit includes a power stage and a conversion controller circuit. The conversion controller circuit supplies a adjustable output voltage to the wireless communication module, to power the wireless communication module. The conversion controller circuit controls the power stage according to the luminance adjustment command, to adjust an output current of an output power, thereby adjusting the luminance of a light emission device. And, the conversion controller circuit controls the adjustable output voltage according to the driving power control command, to regulate the adjustable output voltage to a high voltage level or a low voltage level.

公开(公告)号：US11139697B2

公开(公告)日：2021-10-05

申请号：US16532382

申请日：2019-08-05

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Shang-Hung Hsieh

IPC: H02J50/60 ,  H02J5/00 ,  H02J7/02 ,  H01F38/14 ,  G05B19/042 ,  G01R31/08 ,  G01R31/66 ,  G01R31/52

Abstract: A power system capable of detecting a foreign object includes a power supplier side, a power receiver side and a cable. The power supplier side includes a power control switch, a power control circuit and a pull-up circuit. The power control circuit controls the power control switch to provide a supply voltage to the power receiver side. The pull-up circuit provides a supplier transmission current to generate a supplier transmission voltage for determining whether the power supplier side and the power receiver side are coupled properly. The power control circuit determines whether a foreign object exists between the power supplier side and the power receiver side according to a voltage difference of the supplier transmission voltage before and after the supply voltage VBUS is provided. The power control circuit adaptively controls the power control switch and adjusts the transmission current according to whether a foreign object exists.

公开(公告)号：US20210111634A1

公开(公告)日：2021-04-15

申请号：US16888923

申请日：2020-06-01

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Yu-Chang Chen ,  Chao-Chi Chen ,  Chuh-Ching Li ,  Li-Di Lo ,  Hao-Wen Chung

IPC: H02M3/335 ,  G01R19/165 ,  H03M1/12

Abstract: A flyback power converter includes a primary side controller circuit for controlling a primary side switch; and a secondary side controller circuit for generating an SR (Synchronous Rectification) signal to control an SR switch. The SR signal includes an SR pulse and a ZVS (Zero Voltage Switching) pulse. The SR pulse controls the SR switch for synchronous rectification at the secondary side. The secondary side controller circuit samples and holds a voltage at a first end of the SR switch as a first voltage at a timing between the end of the ZVS pulse and the beginning of the SR pulse, and determines a length of the ZVS pulse so as to control the SR switch to be conductive for a ZVS time period, whereby the primary side switch achieves ZVS. The first voltage is proportional to an input voltage.

公开(公告)号：US20200303785A1

公开(公告)日：2020-09-24

申请号：US16781453

申请日：2020-02-04

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Hao-Wen Chung ,  Chung-Hui Yeh ,  Kuo-Chen Tsai

IPC: H01M10/42 ,  H01M10/48 ,  G01R31/396 ,  G06F13/42 ,  G01R31/382

Abstract: A battery module for use in a battery system is operable in a bottom mode, a top mode or a middle mode during an enabled state. The battery module includes a battery unit and a battery control circuit. The battery unit which includes at least one battery generates a battery unit voltage between a positive terminal and a negative terminal of the battery unit. The battery control circuit is powered by the battery unit voltage and is configured to control the battery unit. The battery control circuit includes an enable terminal, an upstream input terminal, an upstream output terminal, a downstream input terminal, and a downstream output terminal. When the enable terminal is at an operation enabling level, or when the upstream input terminal is at an upstream enabling level, the battery module enters the enabled state.

公开(公告)号：US20200285212A1

公开(公告)日：2020-09-10

申请号：US16882500

申请日：2020-05-24

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Jung-Won Kim

IPC: G05B19/042 ,  G01R31/08 ,  G01V3/02 ,  G01R31/40 ,  G01R31/58 ,  G01R31/66

Abstract: A power system capable of detecting a foreign object, includes a power supplier side, a power receiver side, and a cable. The power supplier side includes a power converter, a foreign object detection and control circuit, and a pull-up circuit. The power converter supplies a supply voltage to the power receiver side according to a power supply control signal. The foreign object detection and control circuit generates the power supply control signal for controlling the power converter, and generates a foreign object detection and control signal according to a voltage at a supplier transmission node of the power supplier side, for determining whether a foreign object exists in the power receiver side. The pull-up circuit adjusts a level of a supply current which is supplied from the supplier transmission node to the power receiver side.

公开(公告)号：US10528067B2

公开(公告)日：2020-01-07

申请号：US15925589

申请日：2018-03-19

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chen-Hui Chan ,  Wei-Hsu Chang ,  Ta-Yung Yang

IPC: G05D23/24 ,  H01C7/04 ,  G01K7/25 ,  H02H7/085

Abstract: An interface device includes: at least one configuration channel terminal for communicating configuration information, wherein whether the interface device itself is in connection and whether the interface device itself is at a high voltage side or a low voltage side are determined according to a voltage or current status at the configuration channel terminal; a multi-functional transmission line, which includes a thermistor; and a temperature monitor circuit, coupled to the multi-functional transmission line, for sensing a temperature status to generate a temperature sensing signal. When two interface devices are connected with each other, the thermistor and the temperature monitor circuit can be located together in one of the interface devices or separately located in different interface devices.