公开(公告)号：US11258273B2

公开(公告)日：2022-02-22

申请号：US16787816

申请日：2020-02-11

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Shun-Yu Huang ,  Tsung-Wei Huang ,  Shui-Mu Lin

IPC: H02J7/00

Abstract: A charger circuit which supplies a charging power to charge a battery circuit, includes: a conversion switch circuit, at least one capacitor and a conversion control circuit. The conversion switch circuit is coupled between a charging power and a ground level and includes conversion switches connected in series. The conversion switch circuit has battery voltage balancing nodes electrically connected to the battery circuit, such that each battery is electrically connected between two of the battery voltage balancing nodes. The conversion control circuit is coupled to the conversion switch circuit and provides operation signals to the conversion switch circuit, to respectively control the corresponding conversion switches, so that the capacitor is periodically connected in parallel to each battery of the battery circuit, thereby balancing the battery voltages of the batteries.

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：US10181744B2

公开(公告)日：2019-01-15

申请号：US15602605

申请日：2017-05-23

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang

IPC: H02J7/00 ,  H02M3/04 ,  H02M7/04 ,  H02M3/07

Abstract: A capacitive power converter circuit converts a DC power from a bus node to a charging power for charging a battery in a charging mode, and converts a battery voltage to a supply voltage through the bus node in a supply mode. The capacitive power converter circuit includes a conversion switch circuit including plural conversion switches configured to be operably coupled to one or more conversion capacitors, and a conversion control circuit for controlling the plural conversion switches. In the charging mode, the plural conversion switches control the conversion capacitors such that the charging current is scaled-up, and in the supply mode, the plural conversion switches control the conversion capacitors such that the supply voltage is scaled-up.

公开(公告)号：US10177576B2

公开(公告)日：2019-01-08

申请号：US15633694

申请日：2017-06-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Shui-Mu Lin ,  Tsung-Wei Huang ,  Chih-Hua Hou

IPC: H02J7/00 ,  H02J7/02

Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.

公开(公告)号：US20180083459A1

公开(公告)日：2018-03-22

申请号：US15633694

申请日：2017-06-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Shui-Mu Lin ,  Tsung-Wei Huang ,  Chih-Hua Hou

IPC: H02J7/00 ,  H02J7/02

CPC classification number: H02J7/0008 ,  H02J7/0045 ,  H02J7/0052 ,  H02J7/0072 ,  H02J7/0077 ,  H02J7/022 ,  H02J7/027 ,  H02M3/07

Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.

公开(公告)号：US20180083458A1

公开(公告)日：2018-03-22

申请号：US15639732

申请日：2017-06-30

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang ,  Shun-Yu Huang

IPC: H02J7/00 ,  H02J7/34 ,  H02M3/06

Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit and a capacitive power conversion circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches and being coupled with one or plural conversion capacitors, a regulation switch, and a conversion control circuit. In a current scaled-up charging mode, the DC current is regulated, and the conversion control circuit controls the connection of the plural conversion capacitors such that the charging current is scaled-up of the DC current substantially by a predetermined current scale-up factor. In a constant voltage linear charging mode, the conversion control circuit linearly controls the regulation switch to regulate the level of the charging voltage to a predetermined constant voltage level.

公开(公告)号：US11811313B2

公开(公告)日：2023-11-07

申请号：US17892068

申请日：2022-08-20

Applicant: Richtek Technology Corporation

Inventor： Tsung-Wei Huang ,  Shui-Mu Lin ,  Fan Ho

IPC: H02M3/07 ,  H02M3/158

CPC classification number: H02M3/07 ,  H02M3/158

Abstract: A switched capacitor converter includes plural switch units. The switch units are configured to switch a coupling relationship of a capacitor between a first power and a second power, wherein at least one of the switch units includes a switch circuit. The switch circuit includes a first switch, a second switch, and a switch driving circuit, wherein the conduction resistance of the first switch is greater than the conduction resistance of the second switch, and the parasitic capacitance of the first switch is less than the parasitic capacitance of the second switch. The switch driving circuit turns on the first switch before the second switch is turned on and/or turns off the first switch after the second switch is turned off, such that the switching loss of the switch circuit is less than a predetermined target value.

公开(公告)号：US11658567B2

公开(公告)日：2023-05-23

申请号：US17407045

申请日：2021-08-19

Applicant: Richtek Technology Corporation

Inventor： Tsung-Wei Huang ,  Ding-Yu Wei

IPC: H02M3/00 ,  H02M3/07 ,  H02M1/088

CPC classification number: H02M3/07 ,  H02M1/088

Abstract: A switching capacitor power conversion circuit includes: a conversion capacitor, plural conversion transistors and an output capacitor connected to an output node. In a switching conversion mode, the switching capacitor power conversion circuit switches connections of the capacitor to convert the input power into an output power on an output node. During a first pre-charging period, a first conversion transistor is controlled to provide a first pre-charging current to pre-charge the conversion capacitor to a predetermined voltage level, and the output capacitor is prevented from being charged. During a second pre-charging period, a second conversion transistor is controlled to provide a second pre-charging current to pre-charge the output capacitor to the predetermined voltage level, and the second pre-charging current supplies a load current to a load circuit.

公开(公告)号：US20230102466A1

公开(公告)日：2023-03-30

申请号：US17929733

申请日：2022-09-05

Applicant: Richtek Technology Corporation

Inventor： Tsung-Wei Huang ,  Shui-Mu Lin

IPC: H02M3/158

Abstract: A multi-mode power system includes a battery module, a first conversion circuit, and a second conversion circuit. The battery module includes a battery path switch and a battery group. The first conversion circuit includes switches and a first capacitor, wherein the switches include the battery path switch. The multi-mode power system operates in one of plural operation mode combinations, wherein when the first conversion circuit operates in a first outgoing mode or a first bypass mode, the second conversion circuit operates in a second incoming mode, a second outgoing mode, or a second bypass mode; when the first conversion circuit operates in a first incoming mode, the second conversion circuit operates in the second incoming mode or the second bypass mode.

公开(公告)号：US20220181987A1

公开(公告)日：2022-06-09

申请号：US17534538

申请日：2021-11-24

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Ta-Yung Yang ,  Wei-Hsu Chang ,  Yu-Chang Chen ,  Tsung-Wei Huang ,  Shui-Mu Lin

IPC: H02M3/335 ,  H02M1/08

Abstract: A control circuit for controlling a power supply circuit to provide power to a system device which includes a communication circuit includes: a pulse width modulation (PWM) controller configured to switch a transformer of the power supply circuit to generate a first output voltage; and a switched capacitor converter configured to generate a second output voltage according to the first output voltage. The second output voltage provides power to the communication circuit, wherein the communication circuit generates a power saving signal to control the PWM controller and the switched capacitor converter. When the power saving signal is enabled, the first output voltage is decreased and a duty ratio of the switched capacitor converter is increased.