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公开(公告)号：US12107586B2
公开(公告)日：2024-10-01
申请号：US17681728
申请日：2022-02-26
发明人： Yi-Kuang Chen , Ming-Jun Hsiao
CPC分类号： H03K7/08 , H03F3/217 , H03F2200/351 , H03K3/017
摘要： A BD type pulse width modulation (PWM) circuit is configured to convert a pair of complementary input signals to a pair of output PWM signals. The BD PWM circuit modulates a basic modulation signal according to the pair of input signals, to generate a basic PWM signal. The common mode levels of the pair of input signals and the basic modulation signal are the same. The BD PWM circuit modulates an offset modulation signal according to the pair of input signals to generate an offset PWM signal. The offset modulation signal and the basic modulation signal have a non-zero offset in between. The BD PWM circuit selects the offset PWM signal or a heavy load PWM signal as the pair of output PWM signals. The heavy load PWM signal is correlated with the basic PWM signal.
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公开(公告)号：US12062974B2
公开(公告)日：2024-08-13
申请号：US17716933
申请日：2022-04-08
发明人： Ta-Yung Yang , Yu-Chang Chen
CPC分类号： H02M1/0006 , H02M3/07 , H02M3/33523
摘要： A switched capacitor converter circuit includes: a conversion capacitor; an output capacitor; and switches configured to switch the coupling configurations of the conversion capacitor and the output capacitor according to a level of the first power supply voltage of the switched capacitor converter circuit, to generate the second power supply voltage at the output capacitor according to the first power supply voltage. The second power supply voltage provides power to control the power converter circuit. When the first power supply voltage is higher than a high threshold, the switched capacitor converter circuit controls the second power supply voltage to be lower than the first power supply voltage. When the first power supply voltage is lower than a low threshold, the switched capacitor converter circuit controls the second power supply voltage to be higher than the first power supply voltage.
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公开(公告)号：US12034367B2
公开(公告)日：2024-07-09
申请号：US17851015
申请日：2022-06-27
发明人： Chen-Pin Huang , Chia-Chun Li , Chen-Lin Hsu , Hung-Yu Cheng , Wan-Hsuan Yang
CPC分类号： H02M1/44 , H02M1/0009 , H02M1/34 , H02M3/158
摘要： A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise canceling signal, wherein the noise canceling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.
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公开(公告)号：US12027966B2
公开(公告)日：2024-07-02
申请号：US17892085
申请日：2022-08-21
发明人： Ta-Yung Yang , Wei-Chuan Wu , Chih-Hao Yang , Ping-Ching Huang , Li-Wen Fang
CPC分类号： H02M1/084 , H02M1/0041 , H02M1/0043 , H02M3/158
摘要： A control circuit for controlling a stackable multiphase power converter includes: a synchronization terminal; a synchronization signal connected to the synchronization terminals of a plurality of the control circuits in parallel, wherein the synchronization signal includes a plurality of pulses to be successively counted as a count number; and a reset signal, configured to reset and initiate the count number; wherein the control circuit further comprises a phase-sequence number, wherein the control circuit enables a corresponding power stage circuit to generate a phase of the output power when the count number reaches the phase-sequence number.
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5.发明授权公开(公告)号：US11962247B2
公开(公告)日：2024-04-16
申请号：US17673062
申请日：2022-02-16
发明人： Ta-Yung Yang , Ying-Chieh Su , Yu-Chang Chen
CPC分类号： H02M3/33571 , H02M1/0058 , H02M1/083 , H02M3/33592 , H02M1/0009
摘要： A resonant half-bridge flyback power converter includes: a first transistor and a second transistor which form a half-bridge circuit; a transformer and a resonant capacitor connected in series and coupled to the half-bridge circuit; and a switching control circuit configured to generate a first driving signal and a second driving signal to control the first transistor and the second transistor respectively for switching the transformer to generate an output voltage. The first driving signal is configured to magnetize the transformer. The second driving signal includes at most one pulse between two consecutive pulses of the first driving signal. The switching control circuit generates a skipping cycle period when an output power is lower than a predetermined threshold. A resonant pulse of the second driving signal is skipped during the skipping cycle period. The skipping cycle period is increased in response to the decrease of the output power.
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公开(公告)号：US11932087B2
公开(公告)日：2024-03-19
申请号：US17389578
申请日：2021-07-30
发明人： Chia-Pao Cheng , Pao-Lin Guo , An-Tsun Teng
CPC分类号： B60J3/0282 , B60Q3/252 , B60Q3/80
摘要： A vanity mirror with lighting function includes: a mounting portion, connected to a vehicle sun visor; a movable portion which can move relatively to the mounting portion; a mirror located in the mounting portion or the movable portion; a power storage unit; a front-open sensing unit for determining whether the vanity mirror is in a front-open state or a folded state; a sensing circuit, wherein when the vanity mirror is in the front-open state, the power storage unit conducts electrical power to the sensing circuit; and a light source for providing lighting function, wherein in the front-open state, whether to emit light and intensity of the light is determined according to the sensing result of the sensing circuit.
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公开(公告)号：US11876093B2
公开(公告)日：2024-01-16
申请号：US17142154
申请日：2021-01-05
发明人： Chih-Feng Huang , Lung-Sheng Lin
IPC分类号： H01L27/07 , H01L29/739 , H01L29/66 , H01L21/8249 , H01L29/872
CPC分类号： H01L27/0722 , H01L21/8249 , H01L29/66136 , H01L29/66143 , H01L29/66325 , H01L29/7393 , H01L29/872
摘要： A power device which is formed on a semiconductor substrate includes: plural lateral insulated gate bipolar transistors (LIGBTs) and a forward conductive unit. The plural LIGBTs are connected in parallel to each other. The forward conductive unit is connected in parallel to the plural LIGBTs. The forward conductive unit consists of a PN diode and a Schottky diode connected in parallel to each other. The PN diode and the Schottky diode share a same N-type region, a reverse terminal, an N-type extension region, an field oxide region, a gate, and a P-type well in an epitaxial layer. The N-type region and the P-type well form a PN junction, wherein the PN junction has a staggered comb-teeth interface from top view. A metal line extends on the staggered comb-teeth interface and alternatingly contacts the N-type region and the P-type well.
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公开(公告)号：US11870400B2
公开(公告)日：2024-01-09
申请号：US17676594
申请日：2022-02-21
发明人： Yi-Kuang Chen
CPC分类号： H03F1/26 , H03F1/0216 , H03F3/217 , H03F2200/372
摘要： A class-D amplifying system includes: a first digital-to-analog converter (DAC), a class-D amplifier circuit and a second DAC. The first DAC generates an analog input signal according to a digital input signal. The class-D amplifier circuit generates an output signal according to the analog input signal in a pulse width modulation (PWM) manner. The second DAC generates a common mode (CM) adjustment current for adjusting a CM voltage of the analog input signal according to one or more of the following parameters: (1) the CM voltage of the analog input signal; and/or (2) a driving power. A power stage circuit of the class-D amplifier circuit is powered by the driving power. The second DAC determines which parameter the CM adjustment current is correlated to according to: (A) A level state of the output signal; and/or (B) A level state of a PWM signal of the class-D amplifier circuit.
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公开(公告)号：US11843321B2
公开(公告)日：2023-12-12
申请号：US17534538
申请日：2021-11-24
发明人： Ta-Yung Yang , Wei-Hsu Chang , Yu-Chang Chen , Tsung-Wei Huang , Shui-Mu Lin
CPC分类号： H02M3/33592 , H02M1/08
摘要： A control circuit for controlling a power supply circuit to provide power to a system device which includes a communication circuit includes: a pulse width modulation (PWM) controller configured to switch a transformer of the power supply circuit to generate a first output voltage; and a switched capacitor converter configured to generate a second output voltage according to the first output voltage. The second output voltage provides power to the communication circuit, wherein the communication circuit generates a power saving signal to control the PWM controller and the switched capacitor converter. When the power saving signal is enabled, the first output voltage is decreased and a duty ratio of the switched capacitor converter is increased.
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公开(公告)号：US11812531B1
公开(公告)日：2023-11-07
申请号：US18049703
申请日：2022-10-26
发明人： Je-Kwang Cho
摘要： A digital-to-analog converter (DAC) for generating an output voltage according to an input code includes a first-type and a second-type sub-DAC's connected in series. The first-type sub-DAC includes a first resistor string and plural first switches, and receives a reference current to determine a first voltage drop. The first switches are controlled by a first portion of the input code to determine a voltage division of the first voltage drop. The second-type sub-DAC includes a second resistor string and plural second switches. The second switches are controlled by a second portion of the input code to determine a portion of the second resistor string to receive the reference current, wherein the portion of the second resistor string and the reference current determines a second voltage drop. The output voltage includes a sum of the second voltage drop and the voltage division of the first voltage drop.
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