公开(公告)号：US11881854B2

公开(公告)日：2024-01-23

申请号：US18163273

申请日：2023-02-01

Applicant: uPI Semiconductor Corp.

Inventor： Shao-Lin Feng

IPC: H03K19/0185 ,  H03K3/037 ,  H03K19/20 ,  H03K5/01 ,  H03K5/00 ,  H03K3/017

CPC classification number: H03K19/018507 ,  H03K3/037 ,  H03K19/20 ,  H03K3/017 ,  H03K5/01 ,  H03K2005/00013

Abstract: A level shifter circuit of a driving device includes first and second pulse generators, first and second level shifters, and a determination circuit. The first pulse generator provides a first input signal according to a high-voltage signal. The first input signal includes a pulse signal having a first current level and a sustain signal having a second current level following the pulse signal. The first level shifter receives the first input signal to generate a first indication signal. The second pulse generator provides a second input signal according to the high-voltage signal. The second input signal includes the pulse signal and the sustain signal following the pulse signal. The second level shifter receives the second input signal to generate a second indication signal. The determination circuit generates a low-voltage signal according to the first indication signal and the second indication signal.

公开(公告)号：US11789045B2

公开(公告)日：2023-10-17

申请号：US17830487

申请日：2022-06-02

Applicant: uPI semiconductor corp.

Inventor： Chao-Chung Huang ,  Kuo-Jen Kuo ,  Yi-Xian Jan

IPC: G01R19/00 ,  G01R1/20 ,  H03F3/343 ,  G01R19/10

CPC classification number: G01R19/0092 ,  G01R1/203 ,  G01R19/10 ,  H03F3/343

Abstract: A current sensing circuit includes a filtering circuit, an amplifier, a first resistor, a first transistor and a second transistor. The filtering circuit is coupled to two terminals of a sensing resistor. The amplifier has a first input terminal, a second input terminal and an output terminal. The second input terminal is coupled to the filtering circuit. The first resistor is coupled between the filtering circuit and the first input terminal of amplifier. A control terminal of the first transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the first input terminal of amplifier and its second terminal is grounded through a second resistor. A control terminal of the second transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the second input terminal of amplifier and its second terminal is grounded through a third resistor.

公开(公告)号：US20230138767A1

公开(公告)日：2023-05-04

申请号：US17946036

申请日：2022-09-16

Applicant: uPI Semiconductor Corp.

Inventor： Yun-Kuo Lee ,  Wei-Hsiang Wang ,  Yen-Chih Lin ,  Wei-Hsiu Hung

IPC: H02M1/00

Abstract: A control circuit of a power converter and a control method thereof are provided. The control circuit includes an error amplifier, a controller, a digital filter, and a digital pulse width signal modulator. The error amplifying circuit is coupled to an output terminal of the power converter and provides a digital error signal. The controller provides a first working parameter corresponding to the first external control command when receiving a first external control command. The digital filter generates a current digital compensation value. The digital pulse width signal modulator generates a pulse width modulation signal. The controller provides a second working parameter corresponding to the second external control command when receiving a second external control command. The controller calculates a transition value according to the second working parameter and the current digital compensation value. The controller provides the second working parameter and the transition value to the digital filter.

公开(公告)号：US11527643B2

公开(公告)日：2022-12-13

申请号：US17342567

申请日：2021-06-09

Applicant: uPI Semiconductor Corp.

Inventor： Nobuyuki Shirai ,  Chun-Hsu Chang ,  Ming-Hung Chou

IPC: H01L29/78 ,  H01L29/423 ,  H01L21/033 ,  H01L29/66

Abstract: Provided is a method of forming a trench gate MOSFET. A hard mask layer is formed on a substrate. The substrate is partially removed by using the hard mask layer as a mask, so as to form a trench in the substrate. A first insulating layer and a first conductive layer are formed in the lower portion of the trench. A sacrificial layer is formed on the side surface of the upper portion of the trench, and the sacrificial layer is connected to the hard mask layer. An interlayer insulating layer is formed on the first conductive layer by a thermal oxidation process when the sacrificial layer and the hard mask layer are present. A second insulating layer and a second conductive layer are formed in the upper portion of the trench. A trench gate MOSFET is further provided.

公开(公告)号：US11463080B2

公开(公告)日：2022-10-04

申请号：US17249695

申请日：2021-03-10

Applicant: uPI semiconductor corp.

Inventor： Chia-Lung Wu

IPC: H03K17/082

Abstract: A power switch circuit is disclosed. The power switch circuit includes an input terminal, an output terminal, a first switch, a second switch, a sensing switch and an adjusting circuit. The first switch is coupled to the input terminal. The second switch is coupled to the first switch and the output terminal. A first node between the first switch and the second switch has a first node voltage. A breakdown voltage of the second switch is higher than that of the first switch. The sensing switch is coupled to the input terminal and the first switch. The adjusting circuit is coupled to the first node and the sensing switch. A second node between the adjusting circuit and the sensing switch has a second node voltage. The adjusting circuit adjusts the second node voltage according to the first node voltage to make it equal to the first node voltage.

公开(公告)号：US20220149734A1

公开(公告)日：2022-05-12

申请号：US17511813

申请日：2021-10-27

Applicant: uPI semiconductor corp.

Inventor： Chih-Lien CHANG ,  Wei-Hsiu HUNG ,  Chun-Ming LU ,  Min-Rui LAI

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/12 ,  H03K7/08

Abstract: A control circuit of a power converter includes a sensing circuit, a ramp signal generation circuit and a PWM circuit. The sensing circuit, coupled to an output circuit, provides a current sensing signal. The ramp signal generation circuit includes a transient circuit and a signal generation circuit. The transient circuit receives the current sensing signal and generates a variable reference voltage. The signal generation circuit provides a ramp signal according to the variable reference voltage. The PWM circuit provides a PWM signal to the output circuit according to the ramp signal. When current sourcing occurs, it continues for a first default time. A transient state during current sourcing continues for a second default time less than first default time. The variable reference voltage is changed from a default value to an adjusted value during the second default time and restored to the default value after the second default time.

公开(公告)号：US11309784B2

公开(公告)日：2022-04-19

申请号：US16992065

申请日：2020-08-12

Applicant: uPI Semiconductor Corp.

Inventor： Chih-Lien Chang ,  Chun-Chieh Wang

IPC: H02M1/00 ,  H02M3/155

Abstract: The disclosure provides a power conversion circuit with a multi-function pin and a multi-function setting method thereof. The multi-function pin is coupled to an external setting circuit. The power conversion circuit includes a first function circuit, a second function circuit, and a judging circuit. The first function circuit is coupled to the multi-function pin. The second function circuit is coupled to the multi-function pin. The judging circuit is coupled to the multi-function pin, the first function circuit, and the second function circuit. The judging circuit provides a setting current to the multi-function pin, so that the external setting circuit generates a voltage according to the setting current. The judging circuit judges the type of external setting circuit according to voltage so as to activate the first function circuit or the second function circuit accordingly. The disclosure also provides a multi-function setting method in which the power conversion circuit automatically activates the corresponding function according to the type of external setting circuit.

公开(公告)号：US20210399635A1

公开(公告)日：2021-12-23

申请号：US17341437

申请日：2021-06-08

Applicant: uPI semiconductor corp.

Inventor： Chih-Lien CHANG ,  Chun-Chieh WANG

IPC: H02M3/156 ,  H02M1/14 ,  H02M1/08

Abstract: A control circuit of a power converter is coupled to an output stage and controls it to convert an input voltage into an output voltage and generate an output current. The control circuit includes a ripple generation circuit, a synthesis circuit, an error amplifier, a comparator and a PWM circuit. The ripple generation circuit generates a ripple signal according to an input voltage, an output voltage and output current. The synthesis circuit receives the ripple signal and a first feedback signal related to output voltage to provide a second feedback signal. The error amplifier receives the second feedback signal and a reference voltage to generate an error signal. The comparator receives a ramp signal and error signal to generate a comparison signal. The PWM circuit generates a PWM signal to control output stage according to the comparison signal. A slope of ripple signal is changed with the output current.

公开(公告)号：US11199564B2

公开(公告)日：2021-12-14

申请号：US17067768

申请日：2020-10-12

Applicant: uPI Semiconductor Corp.

Inventor： Yi-Xian Jan

IPC: G01R19/10

Abstract: A current sensing circuit is provided. The current sensing circuit includes an amplifier, an input resistor, a sensing resistor, and a feedback circuit. The amplifier has a first input terminal, a second input terminal, a third input terminal, and an output terminal. The input resistor is coupled between the first input terminal and the second input terminal of the amplifier. The sensing resistor is coupled between the second input terminal and the third input terminal of the amplifier. The feedback circuit is coupled between the first input terminal and the output terminal. When an input current flows through the sensing resistor, a voltage across the sensing resistor is equal to a voltage across the input resistor, and the feedback circuit correspondingly outputs a sensing voltage according to the input current.

公开(公告)号：US11121618B2

公开(公告)日：2021-09-14

申请号：US16699086

申请日：2019-11-28

Applicant: uPI Semiconductor Corp.

Inventor： Chih-Wen Hsiao ,  Wen-Chieh Tsai

IPC: H02M1/08 ,  H03K17/082 ,  H02M3/156

Abstract: The disclosure provides a power switching circuit. The power switching circuit includes a driving circuit, a determining circuit, a first power switch, and a second power switch. The driving circuit outputs a first driving signal and a second driving signal. The determining circuit is coupled to the driving circuit and outputs a control signal to the driving circuit. The first power switch is coupled to a first input voltage and receives the first driving signal. The second power switch is coupled to a second input voltage and receives the second driving signal. When the first power switch and the second power switch are switched, the second driving signal rises from a first level to a preset level, and the determining circuit controls the driving circuit to utilize the first driving signal to turn off the first power switch.