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公开(公告)号：US20170192446A1
公开(公告)日：2017-07-06
申请号：US14989378
申请日：2016-01-06
Applicant: NXP B.V.
Inventor： Chiahung Su , Madan Mohan Reddy Vemula , Abhijeet Chandrakant Kulkarni , Kenneth Jaramillo
CPC classification number: G05F3/02 , G06F1/266 , G06F1/3253 , H02J4/00 , H04L12/10 , H04L43/08 , H04L43/16 , Y02D10/151 , Y02D50/20 , Y04S40/168
Abstract: Low power solutions can be provided in a serial bus system with a logic controller circuit. The logic controller circuit can include analog circuitry that includes a plurality of analog components and trimming circuitry for configuring the analog components. Digital circuitry can be configured to switch between an active mode and a hibernation mode, wherein the hibernation mode consumes less current than the active mode. A voltage regulator circuit can be configured to generate a regulated voltage from a supply voltage. A reset generation circuit can be configured to determine that the supply voltage has reached a first threshold voltage level and enable the voltage regulator circuit. When the regulated voltage has reached a second threshold voltage level and the supply voltage has reached a third threshold voltage level, the digital circuitry can be switched to the active mode.
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公开(公告)号：US11422578B2
公开(公告)日：2022-08-23
申请号：US16860887
申请日：2020-04-28
Applicant: NXP B.V.
Inventor： Xiaoqun Liu , Madan Mohan Reddy Vemula , Mohammad Nizam Kabir
Abstract: A low dropout regulator includes a first stage that generate a first output voltage and a second stage that generates a second output voltage different from the first output voltage. The first stage and the second stage are coupled in parallel to a node, the stages are selectively controlled respective first and second output signals based on different conditions. One condition may be operation of a load in one or more predetermined modes. Another condition may be transition between modes. Selective control of the first stage during a mode transition may reduce voltage undershoot or voltage overshoot in the load.
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公开(公告)号：US10998897B2
公开(公告)日：2021-05-04
申请号：US16171012
申请日：2018-10-25
Applicant: NXP B.V.
Inventor： Xiaoqun Liu , Madan Mohan Reddy Vemula
IPC: H03K17/082 , H03K17/693 , H03K17/687 , H03K17/567 , H03K17/081 , H02H9/02
Abstract: A power switch over current protection system including a power switch transistor configured to deliver a power current from a power source to power load, a power switch driver configured to control and on/off state of the power switch, an over current protection (OCP) circuit to detect a threshold value of the power current, a discharge transistor configured to discharge a parasitic capacitance of the power switch transistor, and a system state machine to receive a signal from the OCP circuit configured to control an action of the power switch driver and discharge transistor depending on the level of the power current.
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公开(公告)号：US10826386B2
公开(公告)日：2020-11-03
申请号：US16172464
申请日：2018-10-26
Applicant: NXP B.V.
Inventor： Xiaoqun Liu , Madan Mohan Reddy Vemula
Abstract: A multi-stage charge pump including a first stage configured to generate a first output voltage, a last stage configured to receive the first output voltage from the first stage and output a second output voltage, a switch configured to receive the second output voltage from the last stage, and a voltage regulator circuit configured to control the second output voltage of the last stage to maintain a substantially constant on-resistance of the switch.
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公开(公告)号：US10152448B2
公开(公告)日：2018-12-11
申请号：US15364014
申请日：2016-11-29
Applicant: NXP B.V.
Inventor： Madan Mohan Reddy Vemula
Abstract: Embodiments of a resistor module of a USB interface device and a method for operating a resistor module of a USB interface device are described. In an embodiment, a resistor module of a USB interface device includes a pull-down resistor connectable to a USB power-sourcing device, a switch connected between the pull-down resistor and a fixed reference voltage, an energy storage unit connectable to the USB power-sourcing device and configured to store electrical energy in response to a current from the USB power-sourcing device, a switch control unit connected to the energy storage unit and configured to control the switch with a control signal in response to a voltage of the energy storage unit, and a glitch filter connected to the switch and to the switch control unit and configured to remove a glitch in the control signal. Other embodiments are also described.
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Patent Agency Ranking
公开(公告)号：US10019386B2
公开(公告)日：2018-07-10
申请号：US14705631
申请日：2015-05-06
Applicant: NXP B.V.
Inventor： Chiahung Su , Madan Mohan Reddy Vemula
CPC classification number: G06F13/126 , G06F11/2247 , G06F11/3051 , G06F13/385
Abstract: One or more characteristics of devices are ascertained in accordance with one or more aspects of the disclosure. As may be consistent with one or more embodiments, the attachment of an external circuit to an input port is detected based on a resistance value presented by the external circuit. A resistance range that includes the resistance value presented at the input port is determined, in response to detecting the attachment, by dynamically coupling one or more of a plurality of resistor-based circuits relative to the input port. A signal presented by the external circuit on the input port is coded based on the determined resistance range, using one or more of the resistor-based circuits, and the code is used to identify a type of the external circuit. These aspects can provide for the communication of power and data with a variety of different types of external circuits.
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公开(公告)号：US11322975B1
公开(公告)日：2022-05-03
申请号：US17067378
申请日：2020-10-09
Applicant: NXP B.V.
Inventor： Siamak Delshadpour , Madan Mohan Reddy Vemula , Steven Daniel
Abstract: A power source switching circuit is disclosed. The power source switching circuit includes a voltage regulator, a first transistor and a second transistor. The first transistor is coupled with a first voltage source and the second transistor is coupled with a second voltage source. The voltage regulator includes a resistor, one or more diodes coupled together in series and a capacitor. Terminals of the capacitor are coupled between a gate and a source of the first transistor through a first switch and a second switch respectively. The capacitor is configured to hold charge to switch the first transistor on. A value of the capacitor is smaller than a gate to source capacitance of the first transistor.
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公开(公告)号：US20180095490A1
公开(公告)日：2018-04-05
申请号：US15821817
申请日：2017-11-23
Applicant: NXP B.V.
Inventor： Chiahung Su , Madan Mohan Reddy Vemula , Abjijeet Chandrakant Kulkarni , Kenneth Jaramillo , Siamak Delshadpour , Xueyang Geng
CPC classification number: G05F3/02 , G06F1/266 , G06F1/3253 , H02J4/00 , H04L12/10 , H04L43/08 , H04L43/16 , Y02D10/151 , Y02D50/20 , Y04S40/168
Abstract: Low power solutions can be provided in a serial bus system with a logic controller circuit. The logic controller circuit can include analog circuitry that includes a plurality of analog components and trimming circuitry for configuring the analog components. Digital circuitry can be configured to switch between an active mode and a hibernation mode, wherein the hibernation mode consumes less current than the active mode. A voltage regulator circuit can be configured to generate a regulated voltage from a supply voltage. A reset generation circuit can be configured to determine that the supply voltage has reached a first threshold voltage level and enable the voltage regulator circuit. When the regulated voltage has reached a second threshold voltage level and the supply voltage has reached a third threshold voltage level, the digital circuitry can be switched to the active mode.
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公开(公告)号：US20220115904A1
公开(公告)日：2022-04-14
申请号：US17067378
申请日：2020-10-09
Applicant: NXP B.V.
Inventor： Siamak Delshadpour , Madan Mohan Reddy Vemula , Steven Daniel
Abstract: A power source switching circuit is disclosed. The power source switching circuit includes a voltage regulator, a first transistor and a second transistor. The first transistor is coupled with a first voltage source and the second transistor is coupled with a second voltage source. The voltage regulator includes a resistor, one or more diodes coupled together in series and a capacitor. Terminals of the capacitor are coupled between a gate and a source of the first transistor through a first switch and a second switch respectively. The capacitor is configured to hold charge to switch the first transistor on. A value of the capacitor is smaller than a gate to source capacitance of the first transistor.
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公开(公告)号：US10209730B2
公开(公告)日：2019-02-19
申请号：US15821817
申请日：2017-11-23
Applicant: NXP B.V.
Inventor： Chiahung Su , Madan Mohan Reddy Vemula , Abjijeet Chandrakant Kulkarni , Kenneth Jaramillo , Siamak Delshadpour , Xueyang Geng
IPC: H01H35/00 , H01H83/00 , H02H3/00 , H01H47/00 , G05F3/02 , H02J4/00 , G06F1/26 , H04L12/10 , H04L12/26
Abstract: Low power solutions can be provided in a serial bus system with a logic controller circuit. The logic controller circuit can include analog circuitry that includes a plurality of analog components and trimming circuitry for configuring the analog components. Digital circuitry can be configured to switch between an active mode and a hibernation mode, wherein the hibernation mode consumes less current than the active mode. A voltage regulator circuit can be configured to generate a regulated voltage from a supply voltage. A reset generation circuit can be configured to determine that the supply voltage has reached a first threshold voltage level and enable the voltage regulator circuit. When the regulated voltage has reached a second threshold voltage level and the supply voltage has reached a third threshold voltage level, the digital circuitry can be switched to the active mode.
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