公开(公告)号：US10261477B2

公开(公告)日：2019-04-16

申请号：US15863571

申请日：2018-01-05

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su ,  Ryan Huff

IPC: H04L12/10 ,  G05B11/01 ,  H02J3/00

Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.

公开(公告)号：US09535437B1

公开(公告)日：2017-01-03

申请号：US14054516

申请日：2013-10-15

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su

IPC: G05F1/10 ,  H04L12/24 ,  B60R16/03 ,  H04L12/10

CPC classification number: G05F1/10 ,  B60R16/03 ,  G05F1/462 ,  H04L12/10 ,  H04L41/0681 ,  Y02D30/30 ,  Y02D30/32

Abstract: In a PoE system in an automobile, Power Source Equipment (PSE) is connected to Powered Devices (PDs) to provide data and power via Ethernet wires. When the ignition switch is on, the full PSE voltage, such as 44 volts, is supplied to the PDs, and the voltage is regulated by the PDs to power one or more loads in the PD. During a standby mode, such as when the ignition switch is off, the PSE is controlled to output a lower voltage of, for example, 5 volts, and the voltage is regulated by the PDs to power the loads, such as processors, in a low power standby mode. The voltage regulator in the PD for the low power mode may be an efficient linear regulator, and the voltage regulator in the PD for the full voltage mode may be a switching regulator. Thus, there is improved efficiency.

Abstract translation: 在汽车的PoE系统中，电源设备（PSE）连接到有源设备（PD），以通过以太网电线提供数据和电源。 当点火开关打开时，全部PSE电压（例如44伏特）被提供给PD，并且电压由PD调节以为PD中的一个或多个负载供电。 在待机模式期间，例如当点火开关关闭时，PSE被控制以输出例如5伏特的较低电压，并且电压由PD调节以对负载（例如处理器）供电，在 低功耗待机模式。 用于低功耗模式的PD中的电压调节器可以是高效的线性稳压器，并且用于全电压模式的PD中的稳压器可以是开关稳压器。 因此，提高了效率。

公开(公告)号：US20150091391A1

公开(公告)日：2015-04-02

申请号：US14501517

申请日：2014-09-30

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su ,  Ryan Huff

IPC: G05B11/01 ,  H02J3/00

CPC classification number: G05B11/01 ,  H02J3/00 ,  H04L12/10 ,  Y10T307/858

Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.

Abstract translation: 在PoE系统执行的方法中，PSE通过以太网线将数据和工作电压提供给PD。 在提供完整的PoE电压之前，PSE产生PD接收到的低电流信号。 连接在其输入端子上的PD中的电路具有对应于PD的PoE要求的PSE信号的特征模拟响应，例如PD是1型或2型PD。 该电路可以是一定值电容器，齐纳二极管，电阻器或其他电路。 PSE可以产生固定电流，固定电压或时变信号。 在PSE感测特定时间的模拟信号响应的幅度时，PSE将响应与PD的PoE要求相关联。 PSE然后根据PD的PoE要求施加完整的PoE电压。

公开(公告)号：US20180129171A1

公开(公告)日：2018-05-10

申请号：US15863571

申请日：2018-01-05

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su ,  Ryan Huff

IPC: G05B11/01 ,  H04L12/10 ,  H02J3/00

CPC classification number: G05B11/01 ,  H02J3/00 ,  H04L12/10 ,  Y10T307/858

Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.

公开(公告)号：US09897981B2

公开(公告)日：2018-02-20

申请号：US14501517

申请日：2014-09-30

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su ,  Ryan Huff

IPC: G05B11/01 ,  H02J3/00 ,  H04L12/10

CPC classification number: G05B11/01 ,  H02J3/00 ,  H04L12/10 ,  Y10T307/858

Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.

公开(公告)号：US09547318B1

公开(公告)日：2017-01-17

申请号：US14054488

申请日：2013-10-15

Applicant: Linear Technology Corporation

Inventor： David Dwelley ,  Jeffrey Heath ,  Kirk Su

IPC: G05F1/46 ,  G05F1/10

CPC classification number: G05F1/10 ,  B60R16/03 ,  G05F1/462 ,  H04L12/10 ,  H04L41/0681 ,  Y02D30/30 ,  Y02D30/32

Abstract: In a method performed by a Power Over Ethernet (PoE) system, Power Sourcing Equipment (PSE) provides data and voltage over Ethernet wires to a Powered Device (PD). The PD converts the PSE voltage to a regulated voltage by at least one DC-DC converter in the PD. A first load in the PD, such as a processor, operates in a standby mode during a standby period and draws a low current from the converter via a low current path. During this standby period, a high current load in the PD is disconnected and does not draw current. When the first load comes out of the standby mode and into an active mode, the converter supplies a relatively high current to the second load and the first load. In this way, the first load, if a processor, can be already booted up at the time the second load becomes active.

Abstract translation: 在通过以太网供电（PoE）系统执行的方法中，电源设备（PSE）通过以太网电缆将数据和电压提供给有源设备（PD）。 PD通过PD中的至少一个DC-DC转换器将PSE电压转换成调节电压。 PD中的第一负载（例如处理器）在待机期间在待机模式下工作，并且通过低电流路径从转换器抽取低电流。 在该待机期间，PD中的高电流负载断开，并且不抽出电流。 当第一个负载从待机模式进入活动模式时，转换器向第二个负载和第一个负载提供相对较高的电流。 以这种方式，如果处理器的第一个负载在第二个负载激活时可以被启动。