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公开(公告)号：US20180375362A1
公开(公告)日：2018-12-27
申请号：US16006633
申请日：2018-06-12
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Jen Huang , Chih-Hua Hou , Fu-Chi Lin
CPC classification number: H02J7/0072 , H02J7/0055 , H02J7/022 , H02J7/025 , H02J7/04 , H02J50/10 , H02M1/10 , H02M3/07 , H02M3/158 , H02M7/2176
Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
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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
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.
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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.
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4.发明授权公开(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
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.
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5.发明申请公开(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
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.
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Patent Agency Ranking
公开(公告)号：US10523032B2
公开(公告)日：2019-12-31
申请号：US16006633
申请日：2018-06-12
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Jen Huang , Chih-Hua Hou , Fu-Chi Lin
Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
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7.发明申请公开(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.
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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.
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公开(公告)号：US09166477B2
公开(公告)日：2015-10-20
申请号：US14223580
申请日：2014-03-24
Applicant: Richtek Technology Corporation
Inventor： Wei-Jen Huang , Chueh-Kuei Jan , Tsung-Wei Huang , Shui-Mu Lin
CPC classification number: H02M3/156 , H02M2001/0032 , Y02B70/16
Abstract: A control circuit of a power converter includes: a zero current detection circuit for detecting a current flowing between an inductor and a voltage output terminal of the power converter to generate a zero current detection signal; an adjusting circuit for generating an adjustment signal according to the zero current detection signal; a clock signal generating circuit for adjusting a frequency of a clock signal according to the adjustment signal; a periodical signal generating circuit for generating a periodical signal according to the clock signal; an error detection circuit for generating an error signal; and a control signal generating circuit for generating a control signal to control operations of a power switch. If the and amount of pulses generated by the zero current detection circuit satisfy a predetermined condition, the adjusting circuit switches the power converter's operation mode from DCM to CCM.
Abstract translation: 电力转换器的控制电路包括：零电流检测电路，用于检测在电力转换器的电感器和电压输出端之间流动的电流以产生零电流检测信号; 调整电路，用于根据零电流检测信号产生调整信号; 时钟信号发生电路，用于根据调整信号调整时钟信号的频率; 周期信号发生电路，用于根据时钟信号产生周期信号; 用于产生误差信号的误差检测电路; 以及控制信号发生电路，用于产生控制信号以控制电源开关的操作。 如果由零电流检测电路产生的脉冲和量达到预定条件，则调节电路将电力转换器的操作模式从DCM切换到CCM。
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10.发明授权公开(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.
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