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公开(公告)号：US11056970B1
公开(公告)日：2021-07-06
申请号：US16821681
申请日：2020-03-17
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A bridgeless step-up and step-down AC-to-DC converter is used to convert an AC input power source into a DC output power source. The converter includes a first circuit, a second circuit, a third circuit, a third diode, and a fourth diode. The first circuit has a first end, a second send, and a third end; the first end is coupled to the AC input power source, the second end is coupled to a ground end, and the third end is coupled to the DC output power source. The second circuit has a first end, a second end, and a third end; the first end is coupled to the AC input power source, the second end is coupled to the ground end, and the third end is coupled to the DC output power source.
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公开(公告)号：US10886907B1
公开(公告)日：2021-01-05
申请号：US16717371
申请日：2019-12-17
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A method of controlling a resolution of digital pulse width modulation is applied to a digital pulse width modulation generator. The method is to divide a value of a first duty clock by a value of a first pulse width modulation period clock to generate a first resolution. And then, if it is confirmed that a modulation command has been received, a second resolution is generated, and if it is confirmed that the modulation command is not received, a third resolution is generated. The second resolution is greater than the first resolution, and the second resolution is less than the third resolution.
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公开(公告)号：US11018593B1
公开(公告)日：2021-05-25
申请号：US16718680
申请日：2019-12-18
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A dual-mode active clamp flyback converter includes a transformer circuit, a clamping energy storage circuit, and a main switch circuit. The transformer circuit is coupled to a load, and the transformer circuit includes an auxiliary winding. The clamping energy storage circuit is coupled to the transformer circuit. If the load as a heavy loading, the clamping energy storage circuit is turned on. If the load as a light loading, the clamping energy storage circuit is turned off. The main switch circuit is coupled to the transformer circuit. When the main switch circuit is turned on, the auxiliary winding releases energy to a primary-side winding of the transformer circuit.
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公开(公告)号：US10306717B1
公开(公告)日：2019-05-28
申请号：US16038721
申请日：2018-07-18
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A flicker-free LED driving apparatus and voltage regulating method thereof are disclosed. The apparatus includes a power conversion circuit receiving an AC electricity and then generating an output voltage with a ripple component for an LED string; a feedback circuit electrically connected to the power conversion circuit and generating a feedback signal with varying duty cycle according to operation states of the LED string; a power conversion circuit including, a controller receiving the feedback signal turns on or off a switching device thereof according to the feedback signal; and a linear voltage-regulating circuit electrically connected to the power conversion circuit, the feedback circuit, and the LED string. and configured to regulate the output voltage in accordance with a voltage difference between the output voltage and a voltage across the LED string.
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公开(公告)号：US10271401B1
公开(公告)日：2019-04-23
申请号：US16025948
申请日：2018-07-02
发明人： Tsung-Liang Hung , Yeu-Torng Yau
摘要： An electronic device is provided. The electronic device integrates an enable function and an over-temperature protection function (OTP) on the same line, thereby reducing the PCB layout between a microcontroller and a mainboard circuit, and further reducing the circuit complexity and cost. In addition, the negative temperature coefficient (NTC) thermistor in the electronic device is also directly coupled to a circuit pin used for the enable function of the microcontroller to serve as an over-temperature protection application. Therefore, even if the microcontroller fails, the electronic device may still use the hardware circuit structure to automatically achieve the over-temperature protection function.
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6.发明授权公开(公告)号：US09407136B2
公开(公告)日：2016-08-02
申请号：US14747797
申请日：2015-06-23
发明人： Tsung-Liang Hung , Yeu-Torng Yau
CPC分类号： H02M1/4225 , H02M1/34 , H02M1/42 , H02M1/4208 , H02M3/156 , H02M2001/0058 , H02M2001/346 , Y02B70/126 , Y02B70/1491 , Y02P80/112
摘要： A passive coupled-inductor soft-switching circuit of a power factor corrector is provided. The passive coupled-inductor soft-switching circuit includes a power input terminal, a first inductor, a first diode, a power output terminal, a power switch and a buffer circuit. The first inductor has a first terminal and a second terminal, wherein the first terminal of the first inductor is electrically coupled with the power input terminal. The first diode has a positive terminal and a negative terminal, wherein the positive terminal of the first diode is electrically coupled with the second terminal of the first inductor. The power output terminal is electrically coupled with the negative terminal of the first diode. The buffer circuit is electrically coupled with the power switch. By using the buffer circuit, the voltage and current have phase interlacing shifts and thereby reducing the switching loss.
摘要翻译： 提供功率因数校正器的无源耦合电感软开关电路。 无源耦合电感软开关电路包括电源输入端，第一电感，第一二极管，功率输出端，电源开关和缓冲电路。 第一电感器具有第一端子和第二端子，其中第一电感器的第一端子与电力输入端子电耦合。 第一二极管具有正极端子和负极端子，其中第一二极管的正极端子与第一电感器的第二端子电耦合。 电源输出端子与第一二极管的负极端子电连接。 缓冲电路与电源开关电耦合。 通过使用缓冲电路，电压和电流具有相位交错位移，从而降低开关损耗。
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公开(公告)号：US09236808B1
公开(公告)日：2016-01-12
申请号：US14533103
申请日：2014-11-05
发明人： Tsung-Liang Hung , Ya-Lun Ouyang , Yeu-Torng Yau
CPC分类号： H02M3/33576 , H02M3/285 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491 , Y02P80/112
摘要： A parallel resonant converter circuit with current-equalization function includes a power input terminal, a power output terminal, an output capacitor, first and second resonant converters and a third transformer. The first resonant converter is electrically coupled between the power input terminal and the output capacitor/power output terminal. The first resonant converter includes a first transformer. The second resonant converter is electrically coupled between the power input terminal and the output capacitor. The first resonant converter and the second resonant converter are coupled in parallel. The second resonant converter includes a second transformer. The third transformer includes a first coil winding set and a second coil winding set. The first coil winding set is electrically coupled between the power input terminal and the first transformer in series. The second coil winding set is electrically coupled between the power input terminal and the second transformer in series.
摘要翻译： 具有电流均衡功能的并联谐振转换器电路包括电源输入端子，功率输出端子，输出电容器，第一和第二谐振变换器和第三变压器。 第一谐振转换器电耦合在电源输入端和输出电容/功率输出端之间。 第一谐振转换器包括第一变压器。 第二谐振转换器电耦合在电源输入端和输出电容之间。 第一谐振转换器和第二谐振转换器并联耦合。 第二谐振转换器包括第二变压器。 第三变压器包括第一线圈绕组和第二线圈绕组。 第一线圈绕组被串联地电耦合在电源输入端和第一变压器之间。 第二线圈绕组组电连接在电力输入端和第二变压器之间。
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公开(公告)号：US11177740B1
公开(公告)日：2021-11-16
申请号：US17096692
申请日：2020-11-12
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A power conversion apparatus with oscillation reduction control supplies power to a load through an output end. The power conversion apparatus includes a transformer, a power switch, a control module, and an oscillation reduction control module. A primary side of the transformer receives an input voltage, and a secondary side of the transformer is coupled to the output end. The power switch is coupled to the primary side. The control module is coupled to the power switch, controls the power switch continuously turning on and turning off, and converts the input voltage into an output voltage. When the oscillation reduction control module detects a resonance voltage through the secondary side, the oscillation reduction control module performs an oscillation reduction operation to the resonance voltage to reduce an amplitude of the resonance voltage by a damper.
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公开(公告)号：US11165351B1
公开(公告)日：2021-11-02
申请号：US17016535
申请日：2020-09-10
发明人： Yeu-Torng Yau , Tsung-Liang Hung
摘要： A conversion apparatus with oscillation reduction control includes a conversion circuit and an oscillation reduction control circuit. The conversion circuit includes a transformer, a rectifying circuit, and a first switch. The oscillation reduction control circuit stores a leakage inductance energy of the transformer when the first switch is turned off, and the oscillation reduction control provides the leakage inductance energy to a primary-side winding of the transformer when the first switch is turned on.
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公开(公告)号：US10797604B1
公开(公告)日：2020-10-06
申请号：US16544109
申请日：2019-08-19
发明人： Tsung-Liang Hung , Yeu-Torng Yau
摘要： An LLC converter includes a switch module, a transformer, an output circuit, a resonant circuit and a safety capacitor. The switch module is connected between an input voltage and a ground. The transformer has a primary side winding and at least one secondary side winding. The output circuit is connected between the at least one secondary side winding and a load. The resonant circuit is coupled between the primary side winding and the switch module and includes at least one leakage inductor. The safety capacitor is connected between the at least one leakage inductor and the switch module.
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