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公开(公告)号：US10170923B2
公开(公告)日：2019-01-01
申请号：US15951759
申请日：2018-04-12
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Ta-Yung Yang , Jing-Meng Liu , Isaac Y. Chen , Tzu-Chen Lin
Abstract: An adaptive buck converter of a charging cable includes: a power receiving interface for receiving a DC voltage and a cable current from a cable; a terminal communication interface for transmitting a charging voltage and a charging current to a connection terminal of the charging cable and for receiving a communication signal generated by a mobile device from the connection terminal; a power converting circuit for receiving the DC voltage and the cable current from the power receiving interface and for generating the charging voltage and the charging current; a monitor circuit arranged to operably detect the DC voltage or the cable current; and a data processing circuit configured for controlling the power converting circuit according to the communication signal. The data processing circuit further communicates with the mobile device through the terminal communication interface and the connection terminal in response to a detection result of the monitor circuit.
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公开(公告)号：US20180309385A1
公开(公告)日：2018-10-25
申请号：US15632321
申请日：2017-06-24
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Jyun-Che Ho , Isaac Y. Chen , Yi-Wei Lee
CPC classification number: H02M7/4807 , G05F1/40 , H02M1/36 , H02M3/156 , H02M3/335
Abstract: The invention provides a power conversion device, including: a voltage conversion stage, including a primary side for receiving a rectified voltage and a secondary side for generating a rectified voltage according to the rectified voltage, wherein the primary side includes a primary side switch; a switch control circuit having a startup status and a normal operation status, the switch control circuit being configured to operably provide a control signal to a control terminal of the primary side switch; a startup circuit, providing a current to the control terminal when the switch control circuit is in the startup status, to at least partially conduct the primary side switch; and a slow soft-startup circuit, wherein when the switch control circuit is in the startup status and the output voltage does not reach a predetermined voltage in a first predetermined time period, the slow soft-startup circuit reduces a total current quantity supplied to the control terminal in a second predetermined time period which is after the first predetermined time period.
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43.发明申请公开(公告)号：US20180159423A1
公开(公告)日：2018-06-07
申请号：US15874733
申请日：2018-01-18
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Yi-Min Shiu , Isaac Y. Chen
CPC classification number: H02M1/32 , H02H7/10 , H02M3/156 , H02M3/33523 , H02M7/217 , H02M2001/0012 , H02M2001/0025
Abstract: The present invention discloses a short circuit and/or bad connection detection method for use in a power supply system. The power supply system includes a power converter which converts an input voltage to an output voltage and supplies an output current to an electronic device. In the short circuit detection method, the conversion from the input voltage to the output voltage is disabled in a disable time period, and whether a short circuit occurs is determined according to the decreasing speed of the output voltage. In the bad connection detection method, an actual voltage and an actual current received by the electronic device are compared with the output voltage and the output current, to determine whether a bad connection occurs.
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公开(公告)号：US09966857B2
公开(公告)日：2018-05-08
申请号：US15192187
申请日：2016-06-24
Applicant: Richtek Technology Corporation
Inventor： Jiun-Hung Pan , Chien-Fu Tang , Jyun-Che Ho , Isaac Y. Chen , Yu-Chang Chen , Jung-Pei Cheng
CPC classification number: H02M3/33507 , H02M1/08 , H02M3/156 , H02M3/157 , H02M3/33515 , H02M3/33523 , H02M7/217 , H02M2001/0009
Abstract: An AC-to-DC power converter with a BJT as a power switch can set a base current of the BJT by a current setting resistor which is in the outside of a control integrated circuit. Since an output current and a recovery current of the BJT are injected into a sensing resistor, the AC-to-DC power converter can correctly detect an inductor current thereof from the sensing resistor.
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公开(公告)号：US09964972B2
公开(公告)日：2018-05-08
申请号：US15201476
申请日：2016-07-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Chien-Fu Tang , Jiun-Hung Pan , Isaac Y. Chen
CPC classification number: G05F1/10 , H02M3/157 , H02M2001/0025 , H03M1/38
Abstract: A mixed mode compensation circuit for a power converter generate a digital signal according to a reference signal and a feedback signal which is related to the output voltage of the power converter, convert the digital signal into a first analog signal, offset the first analog signal with a variable offset value to generate a second analog signal, and filter out high-frequency components of the second analog signal to generate a third analog signal for stable output voltage of the power converter. The mixed mode compensation does not require large capacitors, and thus the circuit can be integrated into an integrated circuit.
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Patent Agency Ranking
46.发明授权公开(公告)号：US09755511B2
公开(公告)日：2017-09-05
申请号：US15076908
申请日：2016-03-22
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Yi-Wei Lee , Isaac Y. Chen
CPC classification number: H02M3/156 , H02M1/08 , H02M1/14 , H02M2001/0009 , H02M2001/0048 , H03K17/166 , H03K2217/0027 , H05B33/0815 , H05B33/0824 , Y02B20/347 , Y02B70/1491
Abstract: The present invention discloses a current regulator circuit capable of reducing current ripple and a method of reducing current ripple. A power supply circuit generates a load current which originally has a current ripple. The load current is supplied to a load circuit. The current regulator circuit includes a regulator switch coupled to the load circuit, a current sense circuit for sensing the load current, and a control circuit. The control circuit controls the regulator switch to regulate a peak of a current sense signal minus an average of the current sense signal to a non-negative first predetermined value, or regulate the peak minus a valley of the current sense signal to a non-negative second predetermined value.
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47.发明授权Control circuit of power converter with error detection circuit and reverse adjusting circuit 有权具有误差检测电路和反向调整电路的电源转换器控制电路公开(公告)号：US09570989B2
公开(公告)日：2017-02-14
申请号：US14669679
申请日：2015-03-26
Applicant: Richtek Technology Corporation
Inventor： Chien-Fu Tang , Isaac Y. Chen
CPC classification number: H02M3/33507 , H02M2001/0003 , H02M2001/0022 , H02M2001/0048 , Y02B70/1491
Abstract: A control circuit of a power converter includes: an input signal detection circuit, configured to operably detect a magnitude of an input signal to generate a detection signal; a clock generation circuit, configured to operably generate a clock signal; an error detection circuit, configured to operably generate an error signal according to a reference signal and a feedback signal; a control signal generation circuit, coupled with the clock generation circuit and the error detection circuit, configured to operably control a switching frequency of a power switch according to the clock signal and the error signal; and a reverse adjusting circuit, coupled with the input signal detection circuit, configured to operably adjust the clock generation circuit or the control signal generation circuit according to the detection signal to configure the switching frequency of the power switch to be inversely proportional to the magnitude of the input signal.
Abstract translation: 功率转换器的控制电路包括：输入信号检测电路，被配置为可操作地检测输入信号的幅度以产生检测信号; 时钟生成电路，被配置为可操作地生成时钟信号; 误差检测电路，被配置为根据参考信号和反馈信号可操作地产生误差信号; 与时钟发生电路和误差检测电路耦合的控制信号产生电路被配置为根据时钟信号和误差信号可操作地控制功率开关的开关频率; 以及与所述输入信号检测电路耦合的反向调整电路，被配置为根据所述检测信号可操作地调整所述时钟生成电路或所述控制信号生成电路，以将所述功率开关的开关频率与所述功率开关的开关频率成反比 输入信号。
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48.发明授权Apparatus and method for implementing a multiple function pin in a BCM power supply 有权在BCM电源中实现多功能引脚的装置和方法公开(公告)号：US09450486B2
公开(公告)日：2016-09-20
申请号：US14266566
申请日：2014-04-30
Applicant: Richtek Technology Corporation
Inventor： Chien-Fu Tang , Jiun-Hung Pan , Isaac Y. Chen
CPC classification number: H02M3/156 , H02M2001/0009
Abstract: An apparatus and a method for implementing a multiple function pin in a boundary conduction mode power supply, uses a same pin to switch a power switch and to achieve zero current detection to reduce pin count and save cost of a control integrated circuit. A first voltage is applied to the multiple function pin to turn on the power switch, and then a second voltage is applied to the multiple function pin after the power switch has been turned on for a first time, to thereby turn off the power switch. After the power switch has been turned off for a second time, a third voltage is applied to the multiple function pin keep the power switch off. Preferably, a tristate output driver is used to provide the first and second voltages, and a clamping circuit is used to provide the third voltage.
Abstract translation: 在边界导通模式电源中实现多功能引脚的装置和方法，使用相同的引脚切换电源开关，实现零电流检测，减少引脚数，节省控制集成电路的成本。 向多功能引脚施加第一电压以接通电源开关，然后在电源开关第一次接通之后，向多功能引脚施加第二电压，从而关闭电源开关。 电源开关第二次关闭后，第三个电压被施加到多功能引脚上，保持电源开关的不动作。 优选地，使用三态输出驱动器来提供第一和第二电压，并且使用钳位电路来提供第三电压。
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公开(公告)号：US09104216B2
公开(公告)日：2015-08-11
申请号：US13672125
申请日：2012-11-08
Applicant: Richtek Technology Corporation
Inventor： Chien-Fu Tang , Jiun-Hung Pan , Isaac Y. Chen
CPC classification number: G05F1/10 , H02M1/00 , H02M2001/0025 , Y02B70/126
Abstract: A mixed mode compensation circuit and method for a power converter generate a digital signal according to a reference value and a feedback signal which is related to the output voltage of the power converter, convert the digital signal into a first analog signal, offset the first analog signal with a variable offset value to generate a second analog signal, and filter out high-frequency components of the second analog signal to generate a third analog signal for stable output voltage of the power converter. The mixed mode compensation does not require large capacitors, and thus the circuit can be integrated into an integrated circuit.
Abstract translation: 用于功率转换器的混合模式补偿电路和方法根据参考值和与功率转换器的输出电压相关的反馈信号产生数字信号，将数字信号转换成第一模拟信号，偏移第一模拟信号 具有可变偏移值的信号以产生第二模拟信号，并且滤除第二模拟信号的高频分量以产生用于功率转换器的稳定输出电压的第三模拟信号。 混合模式补偿不需要大电容器，因此电路可以集成到集成电路中。
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公开(公告)号：US11303218B2
公开(公告)日：2022-04-12
申请号：US16926726
申请日：2020-07-12
Applicant: Richtek Technology Corporation
Inventor： Isaac Y. Chen , Chien-Fu Tang , Jo-Yu Wang
Abstract: A low delay time power converter circuit includes a driver circuit and a load. The driver circuit generates a switching driving signal to control the load. The driver circuit includes a switching control circuit and an output stage circuit which includes a first power switch, a second power switch and an impedance adjusting circuit. When the switching control circuit controls the switching driving signal to a first voltage level at a first time point, the first power switch is turned ON and then is turned OFF after a predetermined period. When the switching control circuit controls the switching driving signal to a second voltage level at a second time point, the second power switch is turned ON. The time point when the first power switch is turned OFF is earlier than the second time point. A resistance of the impedance adjusting circuit is larger than a conductive resistance of the first power switch.
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