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11.发明公开公开(公告)号：US20230246548A1
公开(公告)日：2023-08-03
申请号：US18149112
申请日：2023-01-01
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Wei-Hsu Chang
CPC classification number: H02M3/07 , H02M1/08 , H02M1/0009
Abstract: A switched capacitor voltage converter circuit for converting a first voltage to a second voltage, includes: a switched capacitor converter and a control circuit. The switched capacitor converter includes at least two capacitors, plural switches and at least one inductor. In a mode switching period wherein the switched capacitor converter switches from a present conversion mode to a next conversion mode, at least two forward switches of the plural switches operate in a unidirectional conduction mode. Each of the forward switches provides a current channel that unidirectionally flows toward the second voltage in the unidirectional conduction mode. The switched capacitor voltage converter circuit is also operable to convert the second voltage to the first voltage.
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公开(公告)号：US11329491B2
公开(公告)日：2022-05-10
申请号：US16890000
申请日：2020-06-02
Applicant: Richtek Technology Corporation
Inventor： Wei-Ting Tai , Wei-Hsu Chang
IPC: H02J7/00
Abstract: A distributed battery balance management method includes: performing a battery system balancing procedure by a battery system balance management unit and performing battery module balancing procedure by module balance management circuit (MBMC) of corresponding battery module (BM). The battery system balancing procedure includes: obtaining lowest module voltages of corresponding BMs; obtaining a lowest system voltage and an average system voltage of the battery system; determining whether the lowest module voltage of the corresponding BM is greater than the average system voltage; when yes, setting a balance time duty ratio of the corresponding MBMC as a first duty ratio; when no, setting the balance time duty ratio of the corresponding MBMC as a second duty ratio; and setting module balance enable signal of corresponding MBMC to be enable, thus allowing the corresponding BM to perform voltage balance control on the batteries in the corresponding BM.
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公开(公告)号：US20220140758A1
公开(公告)日：2022-05-05
申请号：US17511631
申请日：2021-10-27
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Hsu Chang
Abstract: A brushless DC electric (BLDC) motor driver circuit includes: a power stage circuit configured to operably drive a brushless DC electric (BLDC) motor according to a pulse width modulation (PWM) signal; and an abnormality diagnosis circuit, wherein when a first parameter is under control, the abnormality diagnosis circuit is configured to operably determine a rotation abnormality condition of the BLDC motor according to a second parameter; wherein the first parameter and the second parameter are correlated with the rotation of the BLDC motor.
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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
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.
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公开(公告)号：US11137733B2
公开(公告)日：2021-10-05
申请号：US16882500
申请日：2020-05-24
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Hsu Chang , Jung-Won Kim
Abstract: A power system capable of detecting a foreign object, includes a power supplier side, a power receiver side, and a cable. The power supplier side includes a power converter, a foreign object detection and control circuit, and a pull-up circuit. The power converter supplies a supply voltage to the power receiver side according to a power supply control signal. The foreign object detection and control circuit generates the power supply control signal for controlling the power converter, and generates a foreign object detection and control signal according to a voltage at a supplier transmission node of the power supplier side, for determining whether a foreign object exists in the power receiver side. The pull-up circuit adjusts a level of a supply current which is supplied from the supplier transmission node to the power receiver side.
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Patent Agency Ranking
公开(公告)号：US20210075229A1
公开(公告)日：2021-03-11
申请号：US16890000
申请日：2020-06-02
Applicant: Richtek Technology Corporation
Inventor： Wei-Ting Tai , Wei-Hsu Chang
IPC: H02J7/00
Abstract: A distributed battery balance management method includes: performing a battery system balancing procedure by a battery system balance management unit and performing battery module balancing procedure by module balance management circuit (MBMC) of corresponding battery module (BM). The battery system balancing procedure includes: obtaining lowest module voltages of corresponding BMs; obtaining a lowest system voltage and an average system voltage of the battery system; determining whether the lowest module voltage of the corresponding BM is greater than the average system voltage; when yes, setting a balance time duty ratio of the corresponding MBMC as a first duty ratio; when no, setting the balance time duty ratio of the corresponding MBMC as a second duty ratio; and setting module balance enable signal of corresponding MBMC to be enable, thus allowing the corresponding BM to perform voltage balance control on the batteries in the corresponding BM.
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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
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.
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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
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.
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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.
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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
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.
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