公开(公告)号：US20230216425A1

公开(公告)日：2023-07-06

申请号：US17840540

申请日：2022-06-14

Applicant: Richtek Technology Corporation

Inventor： Ta-Yung Yang ,  Yu-Chang Chen

IPC: H02M7/219 ,  H02M1/00 ,  H02M1/08

CPC classification number: H02M7/219 ,  H02M1/0003 ,  H02M1/08

Abstract: A synchronous full-bridge rectifier circuit includes: a first high-side transistor, a first low-side transistor, a second high-side transistor and a second low-side transistor which are configured to generate a DC power source from an AC power source, wherein the first high-side transistor and the first low-side transistor are coupled to a live wire of the AC power source, and the second high-side transistor and the second low-side transistor are coupled to a neutral wire of the AC power source; a first detection transistor, coupled to the live wire and configured to generate a first detection signal; and a second detection transistor, coupled to the neutral wire configured to generate a second detection signal; wherein the first low-side transistor is turned on after the body-diode of the first low-side transistor is turned on; the second low-side transistor is turned on after the body-diode of the second low-side transistor is turned on.

公开(公告)号：US20230197725A1

公开(公告)日：2023-06-22

申请号：US18052950

申请日：2022-11-07

Applicant: Richtek Technology Corporation

Inventor： Wu-Te Weng ,  Chih-Wen Hsiung ,  Ta-Yung Yang

IPC: H01L27/092 ,  H01L21/8238

CPC classification number: H01L27/0922 ,  H01L27/0928 ,  H01L21/823857 ,  H01L21/823871 ,  H01L21/823878 ,  H01L21/823892 ,  H01L21/823814

Abstract: An integrated structure of CMOS devices includes: a semiconductor layer, insulation regions, a first high voltage P-type well and a second high voltage P-type well, a first high voltage N-type well and a second high voltage N-type well, a first low voltage P-type well and a second low voltage P-type well, a first low voltage N-type well and a second low voltage N-type well, and eight gates. A CMOS device having an ultra high threshold voltage is formed in ultra high threshold device region; a CMOS device having a high threshold voltage is formed in high threshold device region; a CMOS device having a middle threshold voltage is formed in the middle threshold device region; and a CMOS device having a low threshold voltage is formed in the low threshold device region.

公开(公告)号：US20230179093A1

公开(公告)日：2023-06-08

申请号：US18049622

申请日：2022-10-25

Applicant: Richtek Technology Corporation

Inventor： Kuo-Chi Liu ,  Ta-Yung Yang

IPC: H02M3/07 ,  H02M3/00 ,  H02M1/00

CPC classification number: H02M3/07 ,  H02M3/015 ,  H02M1/0009

Abstract: A switched capacitor voltage converter circuit includes: a switched capacitor converter and a control circuit. In a charging process of a resonant operation mode, the switches in the switched capacitor converter operate to form a series connection of at least one capacitor and an inductor between a first voltage and a second voltage, as a charging path. In a discharging process of the resonant operation mode, the switches operate to form a series connection of each capacitor and the inductor between the second voltage and a ground level, thus forming plural discharging paths simultaneously or sequentially. In an inductor switching mode, the switches operate to couple one end of the inductor to the first voltage or the ground level alternatingly. The control circuit decides to operate in the resonant operation mode or the inductor switching mode according to the first voltage, thereby maintaining the second voltage within a predetermined range.

公开(公告)号：US20230028873A1

公开(公告)日：2023-01-26

申请号：US17838195

申请日：2022-06-11

Applicant: Richtek Technology Corporation

Inventor： Kuo-Chi Liu ,  Ta-Yung Yang ,  Chung-Lung Pai

IPC: H02M3/07 ,  H02M1/00

Abstract: A switched capacitor voltage converter circuit includes: a switched capacitor converter and a control circuit; wherein the control circuit adjusts operation frequencies and/or duty ratios of operation signals which control switches of the switched capacitor converter, so as to adjust a ratio of a first voltage to a second voltage to a predetermined ratio. When the control circuit decreases the duty ratios of the operation signals, if a part of the switches of the switched capacitor converter are turned ON, an inductor current flowing toward the second voltage is in a first state; if the inductor current continues to flow via a current freewheeling path, the inductor current flowing toward the second voltage becomes in a second state. A corresponding inductor is thereby switched between the first state and the second state to perform inductive power conversion.

公开(公告)号：US20220006392A1

公开(公告)日：2022-01-06

申请号：US17356767

申请日：2021-06-24

Applicant: Richtek Technology Corporation

Inventor： Yu-Chang Chen ,  Wei-Hsu Chang ,  Kun-Yu Lin ,  Ta-Yung Yang

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: A flyback converter includes a power transformer, a primary side switch, a secondary side switch and a controller. A secondary side switching signal has an SR pulse for achieving synchronous rectification, and a ZVS pulse for achieving zero voltage switching. The ZVS pulse is enabled according to a first characteristic of a resonance waveform, whereas, a primary side switching signal is enabled according to a second characteristic of resonance waveform. When an output current increases, the primary side switching signal is disabled during an inhibition interval, such that primary side switching signal does not overlap with the ZVS pulse, thereby preventing the primary and secondary side switches from being both conductive simultaneously. The inhibition interval is correlated with a rising edge of the primary side switching signal in a previous switching period and a resonance period of the resonance waveform.

公开(公告)号：US10741348B2

公开(公告)日：2020-08-11

申请号：US15871896

申请日：2018-01-15

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H01H47/00 ,  G01R19/10 ,  G01R31/08 ,  H02J7/00 ,  H02J1/06 ,  H02J13/00 ,  H01H83/16

Abstract: A power transmission apparatus includes a power delivery unit generating a power, a load unit receiving the power, a cable, at least a connector, at least a power switch, and a communication interface. The power delivery unit and the load unit is coupled by the connector and the cable, and the power is delivered through the cable and the connector. A voltage threshold is determined according to a delivery current of the power or a load current of the load unit. When a voltage difference between a delivery voltage of the power and a load voltage of the load unit is larger than the voltage threshold, the power switch is turned OFF, wherein information of one of the delivery voltage, the load voltage, the delivery current, and/or the load current is provided through the communication interface.

公开(公告)号：US10181782B2

公开(公告)日：2019-01-15

申请号：US15892724

申请日：2018-02-09

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kun-Yu Lin ,  Tzu-Chen Lin ,  Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H02M3/335 ,  H02M1/34 ,  H02M1/08 ,  H02M1/088 ,  H02M1/00

Abstract: A flyback power converter circuit includes: a transformer including a primary side winding coupled to an input power and a secondary side winding coupled to an output node, wherein the input power includes an input voltage; a primary side switch coupled to the primary side winding for controlling the input power to generate an output power on the output node through the secondary side winding, wherein the output power includes an output voltage; a clamping circuit including an auxiliary switch and an auxiliary capacitor connected in series to form an auxiliary branch which is connected with the primary side winding in parallel; and a conversion control circuit for adjusting an ON time of the auxiliary switch according to at least one of a current related signal, the input voltage, and the output voltage, such that the primary side switch is zero voltage switching when turning ON.

公开(公告)号：US10181734B2

公开(公告)日：2019-01-15

申请号：US15287961

申请日：2016-10-07

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Pei-Yu Chiang

IPC: H02J7/00

Abstract: The present invention provides a charging control method for controlling a power delivery unit to supply output power to a mobile unit, wherein the output power includes a DC output voltage and/or a DC output current. The method includes: receiving a power delivery configuration by the power delivery unit, wherein the power delivery configuration at least defines at least one execution time period and plural voltage(s) and/or current(s); the power delivery unit regulates the DC output voltage and/or DC output current according to the power delivery configuration during the at least one execution time period such that the DC output voltage and/or DC output current correspond to the power delivery configuration.

公开(公告)号：US20180307256A1

公开(公告)日：2018-10-25

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 ,  G01K7/25 ,  H01C7/04

CPC classification number: G05D23/24 ,  G01K7/25 ,  H01C7/04 ,  H02H7/0852

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.

公开(公告)号：US10014783B2

公开(公告)日：2018-07-03

申请号：US15395641

申请日：2016-12-30

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yi-Wei Lee ,  Chien-Yang Chen ,  Isaac Y. Chen ,  Ta-Yung Yang

IPC: H02M3/335 ,  H02M1/42 ,  H02M1/00 ,  H02M3/156 ,  H02M1/088

CPC classification number: H02M3/33507 ,  H02M1/088 ,  H02M1/4208 ,  H02M1/4225 ,  H02M1/4258 ,  H02M2001/0009 ,  H02M2001/4291 ,  H02M2003/1566 ,  Y02B70/126 ,  Y02P80/112

Abstract: The present invention provides a switching regulator with PFC function and a control circuit and a control method thereof. The switching regulator with PFC function includes a power stage circuit, a current sense circuit, and a control circuit. The power stage circuit operates at least one power switch therein according to an operation signal to convert an input voltage to an output voltage. When a transient voltage of the input voltage exceeds a transient voltage upper limit, or when a transient slew rate of the input voltage exceeds a transient slew rate upper limit, the control circuit adjusts a frequency response gain from a stable state frequency response gain to a transient state frequency response gain, such that a transient current of an output current does not exceed a current upper limit, and/or that a transient response time of the output current does not exceed a threshold transient time period.