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：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：US20190273428A1

公开(公告)日：2019-09-05

申请号：US16220305

申请日：2018-12-14

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Shun-Yu Huang

IPC: H02M1/096 ,  H03K7/08 ,  H03K17/042

Abstract: A switching power conversion apparatus includes: a multi-level power stage, a PWM control circuit, a multi-level driver circuit, a bootstrap capacitor control circuit and a driving power control circuit. The bootstrap capacitor control circuit includes bootstrap capacitor control switches. During a charging period, a bootstrap control signal controls the bootstrap capacitor control switches, to electrically connect a second bootstrap node to the ground voltage level, whereby the supply voltage charges the bootstrap capacitor via the bootstrap diode. During a pumping period, the bootstrap control signal controls the bootstrap capacitor control switches to electrically connect the second bootstrap node to one of the upper-gate nodes or the switching node, whereby the voltage of the first bootstrap node is pumped to a corresponding pumping voltage level.

公开(公告)号：US20190252896A1

公开(公告)日：2019-08-15

申请号：US16167392

申请日：2018-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Tsung-Han Lee ,  Shun-Yu Huang ,  Chun-Kai Chang

IPC: H02J7/00

Abstract: A charging circuit includes a power conversion circuit, an inductor, and at least one conversion capacitor. The power conversion circuit includes a conversion switch circuit and a conversion control circuit. The conversion switch circuit includes an upper switch, a lower switch, and at least one auxiliary switch. In a switching conversion mode, the conversion control circuit operates the conversion switch circuit to switch the inductor to plural voltage levels repetitively for converting an input power to a charging power to charge a battery by switching power conversion. In a capacitive conversion mode, the conversion control circuit operates the conversion switch circuit to switch the conversion capacitor between two of voltage division nodes periodically for converting the input power to the charging power by capacitive power conversion.

公开(公告)号：US10797500B2

公开(公告)日：2020-10-06

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 ,  H02M3/07

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：US10411581B1

公开(公告)日：2019-09-10

申请号：US16220305

申请日：2018-12-14

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Shun-Yu Huang

IPC: H02M1/096 ,  H03K17/042 ,  H03K7/08 ,  H02M1/08

Abstract: A switching power conversion apparatus includes: a multi-level power stage, a PWM control circuit, a multi-level driver circuit, a bootstrap capacitor control circuit and a driving power control circuit. The bootstrap capacitor control circuit includes bootstrap capacitor control switches. During a charging period, a bootstrap control signal controls the bootstrap capacitor control switches, to electrically connect a second bootstrap node to the ground voltage level, whereby the supply voltage charges the bootstrap capacitor via the bootstrap diode. During a pumping period, the bootstrap control signal controls the bootstrap capacitor control switches to electrically connect the second bootstrap node to one of the upper-gate nodes or the switching node, whereby the voltage of the first bootstrap node is pumped to a corresponding pumping voltage level.

公开(公告)号：US10714944B2

公开(公告)日：2020-07-14

申请号：US16167392

申请日：2018-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Tsung-Han Lee ,  Shun-Yu Huang ,  Chun-Kai Chang

IPC: H02J7/00 ,  H02M3/00 ,  H02J7/02

Abstract: A charging circuit includes a power conversion circuit, an inductor, and at least one conversion capacitor. The power conversion circuit includes a conversion switch circuit and a conversion control circuit. The conversion switch circuit includes an upper switch, a lower switch, and at least one auxiliary switch. In a switching conversion mode, the conversion control circuit operates the conversion switch circuit to switch the inductor to plural voltage levels repetitively for converting an input power to a charging power to charge a battery by switching power conversion. In a capacitive conversion mode, the conversion control circuit operates the conversion switch circuit to switch the conversion capacitor between two of voltage division nodes periodically for converting the input power to the charging power by capacitive power conversion.