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公开(公告)号：US20140226372A1
公开(公告)日：2014-08-14
申请号：US13869684
申请日：2013-04-24
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Chien Fu Tang , Isaac Y. Chen , Jiun Hung Pan , Yung Chih Lai , Jyun Che Ho
IPC: H02M3/335
CPC classification number: H02M3/33523 , H02M3/158 , H02M2001/0009
Abstract: A voltage converter circuit, includes: a power switch for generating a pulse-width-modulation (PWM) signal to drive a current load, wherein the PWM signal toggles between a first level and a second level; a sensing pin, receiving a first sensing signal when the PWM signal is at the first level, and receiving a second sensing signal when the PWM signal is at the second level; a parameter sampling and setting unit, having an input terminal coupling to the sensing pin, generating a default current or a default voltage on the sensing pin and sampling the second sensing signal to generate a sampling signal when the PWM signal is at the second level, and holding the sampling signal to set a parameter of the voltage converter circuit when the PWM signal is at the first level.
Abstract translation: 一种电压转换器电路，包括：用于产生脉宽调制（PWM）信号以驱动电流负载的电源开关，其中所述PWM信号在第一电平和第二电平之间切换; 感测引脚，当PWM信号处于第一电平时接收第一感测信号，以及当PWM信号处于第二电平时接收第二感测信号; 参数采样和设置单元，具有耦合到感测引脚的输入端，在感测引脚上产生默认电流或默认电压，并且在PWM信号处于第二电平时采样第二感测信号以产生采样信号， 并且当PWM信号处于第一电平时，保持采样信号以设置电压转换器电路的参数。
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公开(公告)号：US20140217921A1
公开(公告)日：2014-08-07
申请号：US13914667
申请日：2013-06-11
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Shei Chie Yang , Shui Mu Lin , Shih Chung Wang
IPC: H05B33/08
CPC classification number: H05B33/0845 , H05B33/0848
Abstract: A linearly dimming circuit of a light-emitting device, includes a diming signal processing unit, having a dimming signal input terminal and a current setting output terminal, wherein the dimming signal input terminal receives a luminance percentage setting to set a luminance of the light-emitting device to be a maximal luminance multiplying the luminance percentage setting, the dimming signal processing unit generates a current percentage setting according to the luminance percentage setting, the current setting output terminal outputs a driving current setting which sets the driving current to be a maximal driving current multiplying the current percentage setting; a light-emitting device driver stage, having a current setting input terminal and a driving current output terminal, wherein the current setting input terminal couples to the current setting output terminal and receives the driving current setting, the driving current output terminal outputs the driving current to the light-emitting device.
Abstract translation: 发光装置的线性调光电路包括具有调光信号输入端子和电流设定输出端子的调光信号处理单元，其中调光信号输入端子接收亮度百分比设定以设定发光装置的亮度， 发光装置为与亮度百分比设定相乘的最大亮度，调光信号处理单元根据亮度百分比设定生成电流百分比设定，当前设定输出端子输出将驱动电流设定为最大驱动的驱动电流设定 当前乘以当前百分比设置; 具有电流设定输入端子和驱动电流输出端子的发光装置驱动级，其中电流设定输入端子耦合到电流设定输出端子并接收驱动电流设定，驱动电流输出端子输出驱动电流 到发光装置。
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公开(公告)号：US08698548B2
公开(公告)日：2014-04-15
申请号：US13867662
申请日：2013-04-22
Applicant: Richtek Technology Corp.
Inventor： Hung-Shou Nien , Chung-Sheng Cheng
IPC: H01L35/00
CPC classification number: H03K3/011 , H02M3/1588 , H02M2001/0025 , Y02B70/1466
Abstract: For thermal compensation for an intrinsic element in a system, a circuit and method are proposed to predict the temperature variation caused by power loss of the intrinsic element, in addition to sense the external environment temperature variation of the intrinsic element, and thus sense the operational temperature of the intrinsic element more precisely.
Abstract translation: 对于系统中本征元件的热补偿，提出了一种电路和方法来预测由本征元件的功率损耗引起的温度变化，以及感测本征元件的外部环境温度变化，从而感知操作 内在元素的温度更精确。
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公开(公告)号：US20130162359A1
公开(公告)日：2013-06-27
申请号：US13772628
申请日：2013-02-21
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： CHIEN-FU TANG , ISAAC Y. CHEN
IPC: H03B29/00
Abstract: An oscillator generates a clock signal according to a voltage, a current and a capacitance, and a frequency jitter circuit and method use a random number to modulate the voltage, the current or the capacitance, or a count value to modulate the capacitance, to jitter the frequency of the clock signal.
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公开(公告)号：US20130107591A1
公开(公告)日：2013-05-02
申请号：US13659431
申请日：2012-10-24
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Roland Van ROY , Leng-Nien HSIU , Pei-Yuan CHEN
IPC: H02M7/04
CPC classification number: H02M1/4258 , H02M2001/0025 , Y02B70/126
Abstract: A power-factor-improving circuit and method for an offline converter block the DC component and obtain the AC component of an input voltage of the offline converter. The AC component is superpositioned onto a DC bias signal to generate a dimming signal for the offline converter to adjust an output current of the offline converter. The offline converter has a high power factor due to the dimming signal with the AC component of the input voltage. In addition, the average of the dimming signal is determined by the DC bias signal, hence the output current can be precisely controlled according to the DC bias signal.
Abstract translation: 用于离线转换器的功率因数改善电路和方法阻断DC分量并获得离线转换器的输入电压的AC分量。 AC分量叠加到DC偏置信号上，以产生离线转换器的调光信号，以调整离线转换器的输出电流。 离线转换器由于具有输入电压的AC分量的调光信号而具有高功率因数。 此外，调光信号的平均值由直流偏置信号确定，因此可以根据直流偏置信号精确控制输出电流。
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Patent Agency Ranking
公开(公告)号：US20240311327A1
公开(公告)日：2024-09-19
申请号：US18426261
申请日：2024-01-29
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Ching-Yi Chen , Hsing-Shen Huang , Bo-Jyun Huang
CPC classification number: G06F13/4256 , G06F1/10 , G06F13/4072
Abstract: A bus configuration system includes a plurality of driver integrated circuits (ICs) coupled sequentially on a daisy chain, and a bus controller coupled to the plurality of driver ICs. Each driver IC includes a plurality of ports. The bus controller is used to generate a port definition code for configuring each port of the each driver IC. The bus controller includes a clock output port used to output a clock signal and a data output port used to output a data signal. When a port of the plurality of ports detects the clock signal, the port is configured as a clock input port.
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公开(公告)号：US20240155292A1
公开(公告)日：2024-05-09
申请号：US18079011
申请日：2022-12-12
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Tsung-Han Yang , Yen-Chih Wang , Ming-Jun Hsiao , Tsung-Nan Wu
Abstract: An electronic device includes two speakers, a single functional chip, a parameter extraction circuit, an audio processing module, a gain adjusting circuit and a current detecting unit. The current detecting unit is disposed in the functional chip for detecting the driving current of the two speakers. The functional chip provides the driving voltage of the two speakers based on an output signal and converts the analogue current/voltages of the two speakers into digital current/voltages. The parameter extraction circuit acquires the parameter of each speaker based on the digital current/voltages. The audio processing module acquires the gains of various physical quantities based on the parameter of each speaker and determines the final gain of each physical quantity. The gain adjusting circuit provides the output signal by adjusting the gain of an input signal based on the final gain of each physical quantity.
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公开(公告)号：US20230127211A1
公开(公告)日：2023-04-27
申请号：US17684393
申请日：2022-03-01
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Yung-Jen Chen
Abstract: A buck converter includes a quick response circuit, a compensator coupled to an output node, an interleaving logic circuit coupled to the compensator, a plurality of on-time generators, a plurality of OR gates coupled to the corresponding on-time generator, a plurality of power stages coupled to the corresponding OR gates, a plurality of inductors and an output capacitor. Each on-time generator is coupled to the interleaving logic circuit, an input node and the output node. The quick response circuit includes a voltage droop sensor coupled to the output node, a load frequency sensor coupled to the output node, a quick response signal generator coupled to the voltage droop sensor, a maximum quick response signal generator coupled to the voltage droop sensor and the load frequency sensor, an AND gate coupled to the quick response signal generator, the maximum quick response signal generator and the plurality of OR gates.
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公开(公告)号：US09859783B1
公开(公告)日：2018-01-02
申请号：US14075432
申请日：2013-11-08
Applicant: RICHTEK TECHNOLOGY CORP
Inventor： Yu-Lun Chang , Yuan-Wen Hsiao , Jian-Rong Huang
CPC classification number: H02M1/088 , H02M1/38 , H02M3/156 , H02M3/1588 , H02M2001/0048
Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.
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公开(公告)号：US20170366080A1
公开(公告)日：2017-12-21
申请号：US14075432
申请日：2013-11-08
Applicant: RICHTEK TECHNOLOGY CORP
Inventor： Yu-Lun Chang , Yuan-Wen Hsiao , Jian-Rong Huang
CPC classification number: H02M1/088 , H02M1/38 , H02M3/156 , H02M3/1588 , H02M2001/0048
Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.
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