CN201639476U - Voltage-adjustable PoE power adapter - Google Patents
Voltage-adjustable PoE power adapter Download PDFInfo
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- CN201639476U CN201639476U CN 201020123523 CN201020123523U CN201639476U CN 201639476 U CN201639476 U CN 201639476U CN 201020123523 CN201020123523 CN 201020123523 CN 201020123523 U CN201020123523 U CN 201020123523U CN 201639476 U CN201639476 U CN 201639476U
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Abstract
The utility model discloses a voltage-adjustable PoE power adapter consisting of an electric equipment controller chip LTC4257, an integrated switch regulator LT3435 and a chip ETH10230LB provided with local area network connection ports. A VIN pin of the LTC4257 is connected with a rectifier bridge D1 and a rectifier bridge D2, a second pin is connected with a resistor R1, a fifth pin is connected with an eighth pin, a capacitor C9 is connected between the LT3435 and a BOOST, a capacitor C10 is connected with a Css pin and an output, an input port RJIN and an output port RJOUT of the ETH1-230LB are connected with a standard interface RJ45 of the Ethernet, an electric signal is input into VSSIN and VSSIN_AT via the standard interface RJ45 of the ETHERNET in a two-channel input manner and inputted into the LTC4257 through the bridge rectifiers so as to be in power selection, dual-current limit protection, under voltage lock-out and overload heat protection, and an output end of the LTC4257 is connected with a third pin VIN of an input end of the LE3435 through a DC/DC converter so as to output voltage VOUT12 which is allocated. The voltage-adjustable PoE power adapter can provide power to equipment, such as low-power LX1 instruments, IP telephones, wireless local area network access points AP, safety network cameras and the like via cables, wherein the equipment is provided with network interfaces.
Description
Technical field
The utility model relates generally to the equipment to final power devices, the PoE power supply adaptor that particularly a kind of voltage is adjustable.
Background technology
POE (Power Over Ethernet) Power over Ethernet refers on existing Ethernet CAT-5 wiring architecture just can not guarantee that as under the situation of any change kind equipment provides the ability of direct current supply for this reason in wireless local network connecting point AP (WAP (wireless access point)), secure network video camera and some other terminal transmission data-signal based on Ethernet.
The POE technology is transmitted ethernet signal and DC power supply simultaneously with a general Ethernet cable, and power supply and data integration in the middle of same wired system, have been guaranteed the normal operation of existing network when guaranteeing existing structure wiring safety.By the embedded remote monitoring and the data acquisition system of Power over Ethernet owing to can not be subjected to the constraint of power-supply wiring and the restriction of transfer of data, the connection by a netting twine it can on-the-spot and some the inconvenient places of power supplys power supply of industry control.It will make various embedded systems obtain using more widely.It makes these electronic products not need to rely on the restriction of power supply simultaneously, can effectively reduce electric wiring and make things convenient for moving of equipment.
For PD (receiving end equipment); except compatibility standard; outside high-power; the output voltage of flexible configuration PD; can make voltage range adjustable flexibly, and accurate double-current limiting protecting is provided, have under-voltage locking output function and overload heat protection function; because the detection resistance of inner integrated 25K and have the little encapsulation of DFN of 4mm*3mm only needs external devices seldom just can work normally during design.
At present, a lot of embedded type terminal equipments such as voip phone, wireless local network connecting point AP (WAP (wireless access point)), secure network camera are all supported the PoE standard, but the company of development independently-powered equipment of PSE and PD power supply adaptor is really very few, Britain Silvertel company has carried out the research of independently-powered equipment of PSE and power supply adaptor, also release a series of product, but its interface shape and do not meet the use habit of Chinese user.Perfect scientific ﹠ technical corporation in Taiwan and Mei Sheng scientific ﹠ technical corporation have developed PSE power supply unit and the PD power supply adaptor of supporting the PoE standard, the supply district of PSE covers from 48V-12V, the output of PD adapter covers 12V, 5V, 3.3V power does not wait from 13.5W to 45W, function is complete, kind is many, but price is all higher.At present domestic PSE power supply unit and the PD power supply adaptor that does not also have the marketization support PoE of the manufacturer standard of type.
According to the investigation of domestic and international product is determined that but the developing direction of PoE is high-power output and output voltage flexible configuration from now on.Therefore how to improve power output and Adjustable Output Voltage, how research is eliminated is just put in face of us the interference problem of normal signal transmission.
Summary of the invention
The utility model has proposed the adjustable PoE power supply adaptor of a kind of voltage in order to make voltage range adjustable flexibly, adopts the DC/DC modular converter of the current supply circuit of toggle switch control, the output voltage of flexible configuration PD.Reach the equipment that the LXI instrument that can be low-power consumption, IP phone machine, wireless local network connecting point AP, secure network video camera etc. have network interface and power, lower the purpose of this type of deployed with devices and difficulty of construction greatly by netting twine.
The utility model realizes that the technical scheme that above-mentioned purpose adopts is: it is mainly by power receiving equipment controller chip LTC4257; integrated switch adjuster LT3435 is connected lan port chip ETH1-230LB composition with providing; be connected the polarity behind the voltage commutation of determining to transmit from PSE with D2 at the VIN of described LTC4257 pin and rectifier bridge D1; 2 pin are connected with resistance R 1 the power classification classification are set; 5 pin VOUT are connected to the GND of 8 pin and are used for guaranteeing that the input voltage of LTC4257 is a negative voltage being connected of VOUT output pin; being connected to 9 pairs of mains switches of capacitor C between the SW of described LT3435 and BOOST carries out completely saturated; between Css pin and output, be connected into a capacitor C 10; the input port RJIN of described ETH1-230LB; output port RJOUT is connected with the standard interface RJ45 port of Ethernet ETHERNET; the signal of telecommunication carries out the two-way input by standard interface RJ45 port input VSSIN and the VSSIN_AT of Ethernet ETHERNET; bridge rectifier DFOISA through D1 and D2; input LTC4257 carries out power selection and double-current limiting protecting; under-voltage locking and heat-carrying protection excessively; the output of LTC4257 connects the voltage VOUT12 of output through configuration by the tripod VIN of the input that DC-DC converter DC/DC is connected with LT3435, and this connection is finished by network label DCOUT.
But the utility model adopts configurable DC/DC chip to realize the PD module of output voltage flexible, can export 12V flexibly, 9V, and the voltage of 5V is to adapt to the demand of different power consumption equipments.Configurable its output voltage of PD can be controlled at 80% with power supplying efficiency by circuit analysis, to reduce line loss and heating.LXI instrument, IP phone machine, wireless local network connecting point AP, secure network video camera that can be low-power consumption etc. has the equipment of network interface powers by netting twine, to adapt to the needs of distinct device, lowers the difficulty of this type of deployed with devices and construction greatly.
Description of drawings
Fig. 1 is the utility model power receiving equipment controller chip LTC4257 and peripheral circuit schematic diagram thereof;
Fig. 2 is the utility model integrated switch adjuster LT3435 and peripheral circuit schematic diagram thereof;
Fig. 3 is that the utility model provides connection lan port chip ETH1-230LB and peripheral circuit schematic diagram thereof;
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
The PoE that voltage described in the utility model is adjustable (based on Power over Ethernet) power supply adaptor comprises that mainly power receiving equipment controller chip LTC4257, integrated switch adjuster LT3435 are connected lan port chip ETH1-230LB and peripheral circuit thereof with providing.The VIN pin of described LTC4257 and rectifier bridge D1 are connected the polarity behind the voltage commutation of determining to transmit from PSE with D2,2 pin of described LTC4257 are connected with resistance R 1 the power classification classification are set, the 5 pin VOUT of described LTC4257 are connected to being connected of VOUT output pin with the GND of 8 pin, are used for guaranteeing that the input voltage of LTC4257 is a negative voltage; Be connected between the SW of integrated switch adjuster LT3435 and BOOST 9 pairs of mains switches of capacitor C carry out completely saturated, the Css pin and output between be connected into a capacitor C 10; The input port RJIN of described ETH1-230LB, output port RJOUT is connected with the standard interface RJ45 port of Ethernet ETHERNET.The 4th leg signal input VIN of LTC4257 isolates output DCOUT by capacitor C 1 and is connected with the 3rd pin VIN of LT3435.The direct-flow input end VDDIN_AT of LTC4257 links to each other with ETH1-230LB the 11 pin TXCT, and the direct-flow input end VSSIN_AT of LTC4257 links to each other with ETH1-230LB the 12 pin RXCT; The direct-flow input end VSSIN of LTC4257 links to each other with standard interface RJ45 the 7th pin of Ethernet ETHERNET, and the direct-flow input end VDDIN of LTC4257 links to each other with standard interface RJ45 the 4th pin of Ethernet ETHERNET.The two-way network port input that these four ports are POE.The 6th pin of LTC4257/PWRGD all is connected outer button/SHDN with LT3435 15 pins/SHDN and carries out system closing control.LT3435 the 6th pin BOOST, the 12 pin FB, the tenth pin BLAS all connect VOUT12, carry out the output voltage configuration.
Described LTC4257 is high power PD (receiving end equipment) controller that Linear Tech produces; in compatible IEEE802.3af standard; has sufficient power output; can select power flexibly; accurate double-current limiting protecting is provided; have under-voltage locking output function and overload heat protection function; the output of LTC4257 connects by the tripod VIN of the input that DC-DC converter DC/DC is connected with LT3435, is the 802.11n access point; high power VoIP (Voice over InternetProtoco1) visual telephone; RFID equipment such as (Radio Frequency Identification radio-frequency (RF) identification) provides high-performance power supply solution.LTC4257 has 8 pins; some pin can be according to the use needs of reality and is not connected; LTC4257 will detect resistance and be integrated in chip internal; it is just passable that the outside only need connect graded resistance; power input only need connect the capacitor filtering of a low-capacitance in addition; simultaneously and connect a transient voltage inhibitor to do overvoltage protection just passable, circuit such as Fig. 1.Input voltage that it should be noted that LTC4257 is a negative voltage, input range is from 0.3V to-100V, the voltage that transmits from PSE through rectifier bridge D1 or D2 rectification after polarity determine, 8 pin of LTC4257 are ground, No. 8 pin electromotive forces of relative 5 pin VOUT output pins are high level, therefore the forward voltage that rectification is gone out is carried in pin No. 8, and No. 5 pin are as the reference ground of other devices, LTC4257 just can operate as normal like this, the detection and the stage division of the compatible IEEE802.3af standard definition of LTC4257, can add graded resistance by the 2nd pin the power classification classification is set
The signal of telecommunication carries out the two-way input by standard interface RJ45 port input VSSIN and the VSSIN_AT of Ethernet ETHERNET; bridge rectifier DFOISA through D1 and D2; the 4th pin VIN of input LTC4257; carry out power selection and double-current limiting protecting, under-voltage locking and heat-carrying protection excessively.The output of LTC4257 connects by the tripod VIN of the input that DC-DC converter DC/DC (DC-DC) is connected with LT3435, and this connection is finished by network label DCOUT.LT3435 is the integrated switch adjuster, exportable voltage VOUT12 through configuration.
When PSE is in detecting pattern, one-2.8V can be carried in the LTC4257 two ends to the detection voltage of-10V, this moment, LTC4257 can be carried in the featured resistance of a 25K Ω of inside between GND and VIN, this resistance very accurately and have a temperature compensation function, featured resistance is used for showing that to PSE the online and requirement of PD can be powered, yet the diode in the rectifier bridge is connected with featured resistance in the loop, the integrated featured resistance of the resistance of diode and LTC4257 will be used as a whole detection and arrive concerning PSE, LTC4257 comes the resistance of two diodes in the compensating signal passage by the inner skew that detects resistance is set, thereby meets the detection requirement of IEEE802.3af standard.
Require to have optional accessory power supply in some designs, so just need control PSE whether can detect PD, when PSE is in detecting pattern, LTC4257 will stop PSE to detect, prevent to PD power supply, when input voltage surpass-during 10V, featured resistance returns to 25K and reduces power loss.Input will have the tapping voltage signal of one-15.5V to-20.5V after detecting successfully; the power classification situation will be determined by the graded resistance of 2 pin; device will consume very big power when classification; for fear of overheated and cause device failure; the standard code grading time can not surpass 75ms; if PSE classification detection time has surpassed 75ms; LTC4257 can be overheated; thermal protection circuit will move and cut off classification current source protection LTC4257 in this case, and the progressive operation meeting recovers automatically after temperature reduces.The classification current that gradually changes by loading and keep positive I-V slope to move up to under-voltage locking, LTC4257 provides a good loading behavior to guarantee compatible any PSE, in compatible IEEE802.3af standard, chip internal is integrated, and a driving force reaches the MOSFET of 750mA, and this has guaranteed high-power transmittability.
Described LT3435 is the integrated switch adjuster with the individual 500KHZ of having, and is known products (being sold by female great achievement International Technology Co., Ltd of unit).It allows input voltage to be up to 60V.Have an efficient 3A, the switch of 0.1 Ω can provide to comprise required oscillator, controller and logical circuit.The topological mode of electric current can be used to transient response fast, has the good stable loop systems.Along with the success of innovative designing technique and novel high voltage technology, in super wide input range, obtained very high efficiency.This efficiently in super wide output area electric current, always being held, and utilize excitation mode to be operated under the low current environment.Utilize output that internal circuit is setovered, between the SW of integrated switch adjuster LT3435 and BOOST, be connected to a capacitor C 9 of supplying with supercharging and come mains switch is carried out completely saturated.Can make circuit keep peak switch current, and the required electric current of input is reduced to below the 1 μ A in the whole circulation work period.Can drive the SYNC pin by input logic level, external circuit is realized synchronously.By between Css pin and pin BIAS, being connected into a capacitor C 10, can provide an output voltage (passing through soft start) that slowly rises.This device also has a good power supply mark, can carry out programmable threshold value and overtime and hot protection.
Described ETH1-230LB provides the LAN port that connects the input netting twine by HuaTe Science exploitation and sale, can insert two-way.Be used among the high-power POE application, it supports IEEE802.3at working group.This module aims at 2 pairs of wires design that work in 30 watts, also designed 4 pairs of wirings that two modules are used for 60 watts of application.It has surmounted the requirement of the return loss of gigabit Ethernet.It has the coil of minimum open inductance coefficient 350 μ H, can work under offset current 35mA, 25 ℃ the ambient temperature.Can handle minimum direct current 22.5mA 85 ℃ compensation.Typical ambient temperature can be under direct current 800mA, and from 7 ℃ of 25 ℃ of risings, direct current 1000mA can raise 10 ℃.The isolation of 1500Vrms is arranged between the winding.Operating ambient temperature range is from-40 ℃ to+85 ℃, electric current 1A.
Peripheral circuit comprises that the alternating current-direct current short-circuit mode selects, short-circuit detecting, overvoltage protection, the power supply error condition shows, employing be known circuits, connect by the network label.
Claims (5)
1. PoE power supply adaptor that voltage is adjustable; it is characterized in that: it is mainly by power receiving equipment controller chip LTC4257; integrated switch adjuster LT3435 is connected lan port chip ETH1-230LB composition with providing; be connected the polarity behind the voltage commutation of determining to transmit from PSE with D2 at the VIN of described LTC4257 pin and rectifier bridge D1; 2 pin are connected with resistance R 1 the power classification classification are set; 5 pin VOUT are connected to the GND of 8 pin and are used for guaranteeing that the input voltage of LTC4257 is a negative voltage being connected of VOUT output pin; being connected to 9 pairs of mains switches of capacitor C between the SW of described LT3435 and BOOST carries out completely saturated; between Css pin and output, be connected into a capacitor C 10; input port RJIN at described ETH1-230LB; output port RJOUT is connected with the standard interface RJ45 port of Ethernet ETHERNET; the signal of telecommunication carries out the two-way input by standard interface RJ45 port input VSSIN and the VSSIN_AT of Ethernet ETHERNET; bridge rectifier DFOISA through D1 and D2; input LTC4257 carries out power selection and double-current limiting protecting; under-voltage locking and heat-carrying protection excessively; the output of LTC4257 connects the voltage VOUT12 of output through configuration by the tripod VIN of the input that DC-DC converter DC/DC is connected with LT3435, and this connection is finished by network label DCOUT.
2. the PoE power supply adaptor that voltage according to claim 1 is adjustable is characterized in that: the 4th leg signal input VIN of described power receiving equipment controller chip LTC4257 isolates output DCOUT by capacitor C 1 and is connected with the 3rd pin VIN of LT3435.
3. the PoE power supply adaptor that voltage according to claim 1 is adjustable, it is characterized in that: the direct-flow input end VDDIN_AT of described power receiving equipment controller chip LTC4257 links to each other with ETH1-230LB the 11 pin TXCT, the direct-flow input end VSSIN_AT of LTC4257 links to each other with ETH1-230LB the 12 pin RXCT, the direct-flow input end VSSIN of LTC4257 links to each other with standard interface RJ45 the 7th pin of Ethernet ETHERNET, the direct-flow input end VDDIN of LTC4257 links to each other with standard interface RJ45 the 4th pin of Ethernet ETHERNET, the two-way network port input that these four ports are POE.
4. the PoE power supply adaptor that voltage according to claim 1 is adjustable is characterized in that: the 6th pin/PWRGD of described power receiving equipment controller chip LTC4257 all is connected outer button/SHDN with integrated switch adjuster LT3435 15 pins/SHDN and carries out system closing control.
5. the PoE power supply adaptor that voltage according to claim 1 is adjustable is characterized in that: described integrated switch adjuster LT3435 the 6th pin BOOST, the 12 pin FB, the tenth pin BLAS all connect VOUT12 and carry out the output voltage configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020123523 CN201639476U (en) | 2010-03-05 | 2010-03-05 | Voltage-adjustable PoE power adapter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020123523 CN201639476U (en) | 2010-03-05 | 2010-03-05 | Voltage-adjustable PoE power adapter |
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| CN201639476U true CN201639476U (en) | 2010-11-17 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751919A (en) * | 2012-07-07 | 2012-10-24 | 浙江利欧股份有限公司 | Double-voltage automatic switchover switch and processing method |
| CN102882538A (en) * | 2011-07-12 | 2013-01-16 | 智邦科技股份有限公司 | Driving device for wireless signal access device |
| CN104137022A (en) * | 2012-02-27 | 2014-11-05 | 苹果公司 | Controlling a current drawn from an adapter by a computer system |
| CN106027268A (en) * | 2016-06-29 | 2016-10-12 | 杭州士兰微电子股份有限公司 | Power over Ehernet system, control circuit and control method |
| CN109257533A (en) * | 2018-03-15 | 2019-01-22 | 北京筑梦园科技有限公司 | A kind of networking power supply unit and camera device for camera |
| CN110554725A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | Power receiving equipment for power over Ethernet |
| CN110677264A (en) * | 2019-09-30 | 2020-01-10 | 新华三信息安全技术有限公司 | Method and device for processing power supply fault |
| CN112332515A (en) * | 2020-10-29 | 2021-02-05 | 西安易朴通讯技术有限公司 | Power supply device, computer equipment and power supply system of computer equipment |
| CN115066866A (en) * | 2020-02-26 | 2022-09-16 | 施耐德电器工业公司 | Bidirectional transmission of power and data over a wired telecommunications network |
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- 2010-03-05 CN CN 201020123523 patent/CN201639476U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102882538A (en) * | 2011-07-12 | 2013-01-16 | 智邦科技股份有限公司 | Driving device for wireless signal access device |
| TWI471050B (en) * | 2011-07-12 | 2015-01-21 | Accton Technology Corp | Operating apparatus for a wireless access point |
| CN104137022A (en) * | 2012-02-27 | 2014-11-05 | 苹果公司 | Controlling a current drawn from an adapter by a computer system |
| CN104137022B (en) * | 2012-02-27 | 2017-06-06 | 苹果公司 | The electric current drawn from adapter by computer system control |
| CN102751919A (en) * | 2012-07-07 | 2012-10-24 | 浙江利欧股份有限公司 | Double-voltage automatic switchover switch and processing method |
| CN106027268B (en) * | 2016-06-29 | 2022-09-09 | 杭州士兰微电子股份有限公司 | Ethernet power supply system and control circuit |
| CN106027268A (en) * | 2016-06-29 | 2016-10-12 | 杭州士兰微电子股份有限公司 | Power over Ehernet system, control circuit and control method |
| CN109257533A (en) * | 2018-03-15 | 2019-01-22 | 北京筑梦园科技有限公司 | A kind of networking power supply unit and camera device for camera |
| CN109257533B (en) * | 2018-03-15 | 2024-03-26 | 北京筑梦园科技有限公司 | Networking power supply device for camera and camera equipment |
| US10887117B2 (en) | 2018-05-30 | 2021-01-05 | Huawei Technologies Co., Ltd. | Powered device used for power over ethernet |
| CN110554725A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | Power receiving equipment for power over Ethernet |
| CN110677264A (en) * | 2019-09-30 | 2020-01-10 | 新华三信息安全技术有限公司 | Method and device for processing power supply fault |
| CN110677264B (en) * | 2019-09-30 | 2021-11-12 | 新华三信息安全技术有限公司 | Method and device for processing power supply fault |
| CN115066866A (en) * | 2020-02-26 | 2022-09-16 | 施耐德电器工业公司 | Bidirectional transmission of power and data over a wired telecommunications network |
| CN112332515A (en) * | 2020-10-29 | 2021-02-05 | 西安易朴通讯技术有限公司 | Power supply device, computer equipment and power supply system of computer equipment |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20101117 Termination date: 20110305 |