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公开(公告)号：US11874680B2
公开(公告)日：2024-01-16
申请号：US18154060
申请日：2023-01-13
发明人： Shatabda Saha
摘要： Disclosed is a power supply that automatically switches between a voltage regulation mode and an over current protection mode, as needed. The power supply includes a voltage regulator that generates a first control voltage for applying to the control terminal of a pass transistor during a voltage regulation mode to maintain an output voltage at a desired voltage level. The power supply includes a current limiter that generates a second control voltage for applying to the control terminal of the pass transistor during an over current protection mode to prevent an output current from rising above a maximum output current limit. The power supply includes additional circuitry that detects when over current protection is required and automatically switches the control voltage applied to the control terminal from the first control voltage to the second control voltage or vice versa, as necessary. Also disclosed is an associated power supply method.
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公开(公告)号：US20240012439A1
公开(公告)日：2024-01-11
申请号：US18346965
申请日：2023-07-05
申请人： ROHM Co., LTD.
发明人： Isamu Iwhashi , Hiroki Inoue
IPC分类号： G05F1/575
摘要： Provided is a power supply system including a plurality of linear power supply devices. Each of the linear power supply devices includes an output transistor having a first main electrode that is connectable to an application terminal of an input voltage and a second main electrode that is connectable to a first feedback resistor, the first feedback resistor and a second feedback resistor being connected to each other in series, an error amplifier to which a reference voltage and a feedback voltage that is generated at a node to which the first feedback resistor and the second feedback resistor are connected are input, the error amplifier being capable of driving a control terminal of the output transistor, an output terminal, and an electrode pad.
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公开(公告)号：US20230409065A1
公开(公告)日：2023-12-21
申请号：US18317107
申请日：2023-05-15
发明人： Yi FENG , Hsueh-Yu KAO
摘要： A low-dropout regulator includes an amplifier circuit, a buffer circuit, a control circuit, a power transistor, and a feedback circuit. The amplifier circuit is configured to operate based on an input voltage and generate a first voltage at a first node according to a reference voltage and a feedback voltage. The buffer circuit is configured to generate a second voltage at a second node according to the first voltage. The control circuit is configured to work with the buffer circuit to form a noise canceller. The noise canceller is coupled between the first node, the second node, and a voltage terminal. The power transistor is configured to generate an output voltage according to the input voltage and the second voltage. The feedback circuit is configured to generate the feedback voltage according to the output voltage.
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公开(公告)号：US20230409063A1
公开(公告)日：2023-12-21
申请号：US18084859
申请日：2022-12-20
发明人： Zhen-Yang PANG , Si-Xin HONG , Tian-Li QU
摘要： A voltage mode transmitter circuit includes a low-dropout (LDO) regulator and an output circuit. The LDO regulator generates a driving voltage. The output circuit generates an output signal, and includes: a termination resistor, transmitting the output signal; a data processing circuit, driven by the driving voltage and adjusting a level of a node according to first and second data signals; a pre-emphasis circuit, transmitting a supply voltage to the node according to a control signal to adjust a transition edge of the output signal; a voltage protection circuit, providing an overvoltage protection according to a bias voltage, and coupling the node to the termination resistor. The data processing circuit, the pre-emphasis circuit, and the voltage protection circuit include at least one transistor, and a highest level of the output signal is higher than a withstand voltage of the at least one transistor.
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公开(公告)号：US11822359B1
公开(公告)日：2023-11-21
申请号：US17411656
申请日：2021-08-25
发明人： Yuval Shohet , Robert Manlick
摘要： A current-balanced voltage source may include two regulated voltage sources, each having an input and an output, and an amplifier to receive a control voltage at a positive input and a feedback voltage at a negative input. The output of each amplifier is coupled to the input of the respective regulated voltage source. The outputs of the regulated voltage sources are coupled together to source a current to a load. A differential amplifier may include positive and negative differential inputs, and positive and negative differential outputs. The positive differential input is coupled to the output of the first regulated voltage source and the negative differential input is coupled to the output of the second regulated voltage source. The positive differential output provides the feedback to the first regulated voltage source, and the negative differential output provides the feedback to the second regulated voltage source.
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公开(公告)号：US11815928B2
公开(公告)日：2023-11-14
申请号：US18084309
申请日：2022-12-19
发明人： Viktor Zsolczai , Andras V. Horvath , Peter Onody
摘要： A supply-glitch-tolerant voltage regulator includes a regulated voltage node and an output transistor having a source terminal, a gate terminal, and a drain terminal. The source terminal is coupled to the regulated voltage node. The supply-glitch-tolerant voltage regulator includes a first current generator coupled between a first node and a first power supply node. The supply-glitch-tolerant voltage regulator includes a second current generator coupled between the first node and a second power supply node. The supply-glitch-tolerant voltage regulator includes a feedback circuit coupled to the first current generator and the second current generator and is configured to adjust a voltage on the first node based on a reference voltage and a voltage level on the regulated voltage node. The supply-glitch-tolerant voltage regulator includes a diode coupled between the drain terminal and the first power supply node and a resistor coupled between the gate terminal and the first node.
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公开(公告)号：US20230359235A1
公开(公告)日：2023-11-09
申请号：US18298758
申请日：2023-04-11
发明人： Ivan Floriani , Elena Brigo
CPC分类号： G05F1/575 , G05F1/595 , H02M1/0009 , H02M3/1582
摘要： A control device for a switching voltage regulator includes: a first detector of a first measurement signal indicative of a current flowing in a first side of the regulator, and providing a first comparison signal as a function of a first threshold; a second detector of a second measurement signal indicative of a current flowing in a second side of the regulator, and providing a second comparison signal as a function of a second threshold; a driving-signal generation circuit which generates a switching control signal from the first comparison signal to drive the switching circuit; a calibration circuit which receives an alert signal indicative of the first threshold, compares the alert signal and the second comparison signal, and provides a calibration signal in response; and a feedback circuit which provides a control signal as a function of an error signal and of the calibration signal.
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公开(公告)号：US20230359234A1
公开(公告)日：2023-11-09
申请号：US18298005
申请日：2023-04-10
申请人： NXP B.V.
CPC分类号： G05F1/575 , G05F1/565 , G06K19/0715
摘要： A voltage limiter for a radio-frequency identification (RFID) integrated circuit (IC) for an RFID tag and a method for operating a voltage limiter is disclosed. The RFID IC includes a radio-frequency (RF) rectifier. The voltage limiter comprises: a current sink device coupled between an output of the RF rectifier and ground; a reference generator having an output for providing a reference voltage (Vlim) for controlling a current through the current sink device to limit a voltage (Vrec) at the output of the RF rectifier to values below a predefined voltage level; and feedback circuitry arranged to provide a feedback current to the reference generator to vary the reference voltage (Vlim), the feedback current being dependent on the current through the current sink device.
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公开(公告)号：US20230359233A1
公开(公告)日：2023-11-09
申请号：US17738740
申请日：2022-05-06
发明人： Kenji Maeda , Eric Chim , Yichao Jiang
CPC分类号： G05F1/575 , G06F1/26 , H04B3/54 , H01R13/665
摘要： Methods and systems are provided for current and/or power balancing. One method includes comparing a first input current of a first regulator in a first path between a power source and a power sink with a second input current of a second regulator in a second path between the power source and the power sink; lowering an output from the first regulator, in response to the first input current being higher than the second input current; and increasing an output from the second regulator, in response to the second input current being higher than the first input current.
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公开(公告)号：US11803202B2
公开(公告)日：2023-10-31
申请号：US17933972
申请日：2022-09-21
发明人： Marco Ruta , Antonio Conte , Michelangelo Pisasale , Agatino Massimo Maccarrone , Francesco Tomaiuolo
摘要： A voltage regulator receives an input voltage and produces a regulated output voltage. A first feedback network compares a feedback signal to a reference signal to assert/de-assert a first pulsed control signal when the reference signal is higher/lower than the feedback signal. A second feedback network compares the output voltage to a threshold signal to assert/de-assert a second control signal when the threshold signal is higher/lower than the output voltage. A charge pump is enabled if the second control signal is de-asserted and is clocked by the first pulsed control signal to produce a supply voltage higher than the input voltage. A first pass element is enabled when the second control signal is asserted and is selectively activated when the first pulsed control signal is asserted. A second pass element is selectively activated when the second control signal is de-asserted.
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