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公开(公告)号：US10705497B2
公开(公告)日：2020-07-07
申请号：US15996516
申请日：2018-06-03
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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公开(公告)号：US20200173948A1
公开(公告)日：2020-06-04
申请号：US16781988
申请日：2020-02-04
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Yu-Lin Yang , Chun-Hao Chang , Min-Da Wu , Hung-Der Su , Da-Hong Qian
Abstract: The invention provides a bio-detection device, including a carrier, a plurality of spacers, an electronic circuit, and a package layer, wherein an open platform is formed. The carrier includes a test region and a signal transmission wiring, wherein the test region is configured to carry a fluid under test. The spacers are located on the test region and electrically connected to two different voltage levels to form a capacitor for sensing a capacitance of the fluid. The spacers are connected to the signal transmission wiring. The electronic circuit receives and processes a sensing signal corresponding to the capacitance of the fluid. The package layer covers a portion of the carrier but does not cover the test region. The open platform is formed whereby a user can easily put in the fluid. The open platform has a bottom which includes the test region, and an area of the open platform is defined by the spacers and the package layer.
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公开(公告)号：US20200153285A1
公开(公告)日：2020-05-14
申请号：US16739702
申请日：2020-01-10
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Kuo-Chi Liu
IPC: H02J50/12
Abstract: The present invention provides a wireless power transmitter circuit which includes a power converter circuit, a power inverter circuit, a resonant transmitter circuit and a power control circuit. The power conversion circuit converts an input power to a conversion output power which includes a conversion output voltage. The power inverter circuit converts the conversion output power to an AC output power. The resonant transmitter circuit converts the AC output power to a resonant wireless power. The power control circuit generates a current reference signal according to the conversion output voltage, and generates a conversion control signal according to a difference between the current reference signal and a resonant current related signal, to control the power converter circuit such that the resonant wireless power is regulated substantially at a predetermined power level.
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公开(公告)号：US10594209B2
公开(公告)日：2020-03-17
申请号：US16171397
申请日：2018-10-26
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsuan-Ju Chen
Abstract: A switching power converter circuit includes a power switch for operating an inductor to convert the input voltage to the output voltage to drive a load circuit; and a control circuit, including: a pulse width modulation circuit comparing an output related signal with a ramp signal to generate a pulse width modulation signal for controlling the power switch, wherein the output related signal is related to the output voltage; an error amplifier circuit generating an error amplified signal according to a difference between the output related signal and a reference signal; and a ramp signal generation circuit generating the ramp signal, wherein an amplitude of the ramp signal is determined according to the input voltage and the output voltage; and/or the slope of the ramp signal is determined according to the error amplified signal.
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公开(公告)号：US20200067322A1
公开(公告)日：2020-02-27
申请号：US16666358
申请日：2019-10-28
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Hsu Chang , Ta-Yung Yang
Abstract: A rechargeable battery is coupled to a power delivery unit or an external load unit. In a charging mode, the power delivery unit converts an input power to a converted voltage and/or current. A charging circuit converts the converted voltage and/or current to a charging voltage and/or current for charging the rechargeable battery. Power data is communicated between the power delivery unit and the rechargeable battery by: 1) the power delivery unit adjusting the converted voltage, wherein the power data is expressed by plural voltage levels of the converted voltage; and/or 2) the rechargeable battery adjusting a battery input current, wherein the power data is expressed by plural current levels of the battery input current. At least one of the converted voltage, the converted current, the charging voltage, or the charging current is adjusted according to the power data.
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Patent Agency Ranking
公开(公告)号：US20200044022A1
公开(公告)日：2020-02-06
申请号：US16449350
申请日：2019-06-22
Applicant: Richtek Technology Corporation
Inventor： Tsung-Yi Huang , Chu-Feng Chen
IPC: H01L29/06 , H01L29/78 , H01L29/66 , H01L21/762
Abstract: A high voltage device includes: a semiconductor layer, an isolation region, a deep well, a buried layer, a first high voltage well, a first conductivity type well, a second high voltage well, a body region, a body contact, a deep well column, a gate, a source and a drain. The deep well column is located between the drain and a boundary of the conductive layer which is near the source in a channel direction. The deep well column is a minority carriers absorption channel, to avoid turning ON a parasitic transistor in the high voltage device.
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公开(公告)号：US20200006490A1
公开(公告)日：2020-01-02
申请号：US16354140
申请日：2019-03-14
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Tsung-Yi Huang
Abstract: An N-type high voltage device includes: a semiconductor layer, a well region, a floating region, a bias region, a body region, a body contact, a gate, a source and a drain. The floating region and the bias region both have P-type, and both are formed in a drift region in the well region. The bias region is electrically connected with a predetermined bias voltage, and the floating region is electrically floating, to increase a breakdown voltage of the high voltage device and suppressing turning-ON a parasitic transistor in the high voltage device.
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公开(公告)号：US10476275B2
公开(公告)日：2019-11-12
申请号：US15284643
申请日：2016-10-04
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Chang-Yu Wu , Yi-Wei Lee
Abstract: The present invention provides a multi-load control apparatus, a slave circuit and a control method thereof. The multi-load control apparatus includes a master circuit and at least one slave circuit. The master circuit generates at least one pulse width modulation (PWM) signal according to an input signal. The slave circuit controls a power switch according to a corresponding PWM signal. The slave circuit has a primary side circuit and a secondary side circuit. The primary side circuit generates an AC PWM signal according to the corresponding PWM signal. The power switch has a control terminal which is driven according to a floating ground level which is not a constant voltage level. The power switch has a current inflow terminal and a current outflow terminal, which are connected to a corresponding load circuit in series, wherein the series circuit of the power switch and the load circuit receives an AC voltage.
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69.发明申请公开(公告)号：US20190341770A1
公开(公告)日：2019-11-07
申请号：US16354129
申请日：2019-03-14
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Shung-Tsung Chen , Yi-Syue Jhu , Chieh-Min Lo , Tsung-Han Tsai
Abstract: A power supply system includes a power supplier circuit and a power receiver circuit. The power supplier circuit supplies a power via a communication interface compatible with a first communication interface specification or a second communication interface specification. The first communication interface specification includes a delay threshold. After the power supplier circuit is coupled to the power receiver circuit, the power supplier circuit supplies the power after a first delay period. The power receiver circuit confirms whether the power supplier circuit is coupled to the power receiver circuit via a coupling confirmation step according to the first communication interface specification. The power receiver circuit confirms whether the power supplier circuit is compatible with the first communication interface specification or the second communication interface specification according to whether the first delay period is greater than the delay threshold.
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公开(公告)号：US10461652B2
公开(公告)日：2019-10-29
申请号：US16132367
申请日：2018-09-15
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Chien-Fu Tang , Jo-Yu Wang , Isaac Y. Chen
Abstract: A flyback power converter includes: a transformer, a power switch, a switch control unit, a synchronous rectifier switch and a secondary side control circuit. The secondary side control circuit includes: a switch signal generation circuit and a first power conversion circuit. The secondary side control circuit is coupled to the synchronous rectifier switch and the secondary winding of the transformer. The switch signal generation circuit generates the synchronous rectifier switch signal selectively according to a first power or a second power, to control the synchronous rectifier switch. The first power is related to the output voltage. The first power conversion circuit generates the second power according to a secondary phase signal on a phase node between the secondary winding of the transformer and the synchronous rectifier switch.
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