CN106101028B - Ethernet switch and power receiving and supplying circuit thereof - Google Patents
Ethernet switch and power receiving and supplying circuit thereof Download PDFInfo
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- CN106101028B CN106101028B CN201610685638.2A CN201610685638A CN106101028B CN 106101028 B CN106101028 B CN 106101028B CN 201610685638 A CN201610685638 A CN 201610685638A CN 106101028 B CN106101028 B CN 106101028B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/40—Constructional details, e.g. power supply, mechanical construction or backplane
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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Abstract
The invention belongs to the technical field of Ethernet and provides an Ethernet switch and a power receiving and supplying circuit thereof. In the invention, by adopting a power receiving and supplying circuit comprising a power receiving module, a power supplying module, a mainboard power supply module, a power receiving detection module, a control module and a switch chip, the power receiving module sends direct current to the power supplying module, the mainboard power supply module and the power receiving detection module and sends data to the switch chip; the power supply module supplies power outwards according to the direct current; the mainboard power supply module is used for performing voltage conversion on the direct current and then supplying power to the power receiving detection module, the control module and the switch chip; the power receiving detection module outputs a detection signal to the control module according to the direct current; control module is according to detection signal output control signal, and the switch chip is according to the break-make of detection signal control network port to go out data transmission, solved current POE switch and had that circuit structure is complicated, the fault rate is high, with high costs and the uncontrollable problem of non-supply network port.
Description
Technical Field
The invention belongs to the technical field of Ethernet, and particularly relates to an Ethernet switch and a power receiving and supplying circuit thereof.
Background
At present, active Ethernet (POE) powered and powered Ethernet switch devices are widely applied in the internet field due to the advantages of simple installation, convenient construction, and the like. The POE switch provided in the market has a single chip function, and can only perform single-port power supply or single-port power receiving.
In order to solve the above problems, in the prior art, multiple power supply chips and multiple power receiving chips are adopted in a POE switch, however, this method makes the circuit structure of the POE switch complex, which leads to the problems of increased failure rate, high cost, and the like; in addition, when a certain network port of the POE switch supplies power, the method can not only communicate with the power supply network port, but also communicate with other network ports, so that the problem that the POE switch cannot control the non-power supply network port is caused.
In conclusion, the conventional POE switch has the problems of complex circuit structure, high failure rate, high cost and uncontrollable non-power supply network ports.
Disclosure of Invention
The invention aims to provide an Ethernet switch and a power receiving and supplying circuit thereof, and aims to solve the problems that the existing POE switch is complex in circuit structure, high in failure rate and high in cost, and a non-power-supply network port is uncontrollable.
The invention is realized in this way, a power receiving and supplying circuit of Ethernet exchanger, the said power receiving and supplying circuit is connected with external power supply equipment and external power receiving equipment, the said power receiving and supplying circuit includes power receiving module, power supply module, power module of the mother board, power detection module, control module and exchanger chip;
the data port of the power receiving module is connected with the network port of the switch chip, and the output end of the power receiving module is connected with the input end of the power supply module, the input end of the mainboard power supply module and the first input end of the power receiving detection module; the data port of the power supply module is connected with the network port of the switch chip; the output end of the mainboard power supply module is connected with the second input end of the power receiving detection module, the voltage input end of the control module and the voltage input end of the switch chip; the output end of the power receiving detection module is connected with the signal input end of the control module; the signal output end of the control module is connected with the signal input end of the switch chip;
the power receiving module receives direct current and data provided by the external power supply equipment and sends the direct current to the power supply module, the mainboard power supply module and the power receiving detection module; the power supply module supplies power to the external powered device according to the direct current; the mainboard power supply module performs voltage conversion on the direct current and supplies power to the power receiving detection module, the control module and the switch chip according to the converted working direct current; the power receiving detection module outputs a detection signal to the control module according to the direct current; the control module processes the detection signal and then outputs a control signal, the switch chip identifies the control signal and controls the on-off of a network port according to the control signal so as to send the data received by the power receiving module to the external power receiving equipment through the power supply module.
Another object of the present invention is to provide an ethernet switch, which includes the above power receiving and supplying circuit.
According to the invention, by adopting a power receiving and supplying circuit comprising a power receiving module, a power supply module, a mainboard power supply module, a power receiving detection module, a control module and a switch chip, the power receiving module sends direct current to the power supply module, the mainboard power supply module and the power receiving detection module, and sends data to the switch chip; the power supply module supplies power to external powered equipment according to the direct current; the mainboard power supply module is used for converting the voltage of the direct current and then supplying power to the power receiving detection module, the control module and the switch chip; the power receiving detection module outputs a detection signal to the control module according to the direct current; control module exports control signal to the switch chip according to the detected signal, the break-make of switch chip according to control signal control network port, in order to send data to outside powered device through power module, because this circuit detects the power receiving condition of ethernet switch through receiving power detection module, and then make the network port of switch chip controllable, and this circuit need not to use a plurality of power supply chips and power receiving chip, moreover, the steam generator is simple in structure, and low cost, it is complicated to have solved current POE switch to have circuit structure, the fault rate is high, with high costs and the uncontrollable problem of non-power supply network port.
Drawings
Fig. 1 is a schematic block diagram of a power receiving and supplying circuit according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a power receiving and supplying circuit according to another embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of a power receiving module, a power supplying module and a motherboard power module of the power receiving and supplying circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a power receiving detection module, a control module and a switch chip of the power receiving and supplying circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of implementations of the invention refers to the accompanying drawings in which:
fig. 1 shows a module structure of a power over ethernet switch power supply circuit according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:
as shown in fig. 1, the power receiving and supplying circuit according to the embodiment of the present invention includes a power receiving module 10, a power supplying module 11, a motherboard power module 12, a power receiving detecting module 13, a control module 14, and a switch chip 15.
The data port of the powered module 10 is connected to the network port of the switch chip 15, and the output end of the powered module 10 is connected to the input end of the power supply module 11, the first input end of the motherboard power module 12 and the first input end of the powered detection module 13; the data port of the power supply module 11 is connected with the network port of the switch chip 15; the output end of the main board power module 12 outputs working direct current, and the output end of the main board power module 12 is connected with the second input end of the power receiving detection module 13, the voltage input end of the control module 14 and the voltage input end of the switch chip 15; the output end of the power receiving detection module 13 is connected with the signal input end of the control module 14; the signal output of the control module 14 is connected to the signal input of the switch chip 15.
Specifically, the power receiving module 10 receives the direct current and the data provided by the external power supply device 20, and sends the direct current to the power supply module 11, the motherboard power supply module 12, and the power receiving detection module 13; the power supply module 11 supplies power to the external powered device 30 according to the direct current; the main board power supply module 12 converts the voltage of the direct current and supplies power to the power receiving detection module 13, the control module 14 and the switch chip 15 according to the converted working direct current; the power receiving detection module 13 outputs a detection signal to the control module 14 according to the direct current; the control module 14 processes the detection signal and outputs a control signal, and the switch chip 15 recognizes the control signal and controls the on/off of the network port according to the control signal, so as to transmit the data received by the power receiving module 10 to the external power receiving device 30 through the power supply module 11.
It should be noted that, in this embodiment, the voltage value of the direct current is 48V, the value of the power supply voltage is the same as the voltage value of the direct current, and the voltage value of the working direct current is 3.3V.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the power receiving module 10 includes a power receiving interface unit 100 and a power receiving unit 101.
The data interface of the power receiving interface unit 100 is a data port of the power receiving module 10, the power receiving interface of the power receiving interface unit 100 is connected to the input terminal of the power receiving unit 101, and the output terminal of the power receiving unit 101 and the power receiving interface of the power receiving interface unit 100 form the output terminal of the power receiving module 10.
Specifically, the power receiving unit 101 receives the dc power and the data provided by the external power supply device 20 through the power receiving interface unit 100, and transmits the dc power to the power supply module 11 and the motherboard power module 12, the power receiving interface unit 100 outputs the dc power to the power receiving detection module 13, and the power receiving interface unit 100 transmits the data to the switch chip 15.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the power receiving interface unit 100 includes a plurality of power receiving interface chips RJ45, and the power receiving unit 101 includes a plurality of first diodes D1.
A data pin Y1 of the power receiving interface chip RJ45 forms a data interface of the power receiving interface unit 100, a voltage pin Y2 of the power receiving interface chip RJ45 forms a power receiving interface of the power receiving interface unit 100, anodes of the first diodes D1 form an input end of the power receiving unit 101, cathodes of the first diodes D1 form an output end of the power receiving unit 101, and a voltage pin Y2 of each power receiving interface chip RJ45 is connected with an anode of each first diode D1 in a one-to-one correspondence manner; it should be noted that, in this embodiment, a data pin Y1 of the power receiving interface chip RJ45 refers to pin 1 or pin 2 of the power receiving interface chip RJ45, or pin 3 or pin 6 of the power receiving interface chip, a voltage pin Y2 of the power receiving interface chip RJ45 refers to pin 4 or pin 5 of the power receiving interface chip RJ45, a pin Y3 of the power receiving interface chip RJ45 is grounded, and pin 3 refers to a ground pin 7 or a ground pin 8 of the power receiving chip RJ 45.
It should be noted that, in this embodiment, the number of power receiving interface chips RJ45 in the circuit shown in fig. 3 is 7, but the number of interfaces of the power receiving interface chip RJ45 is not limited to 7, and it may be set according to the number of network ports of the ethernet switch and the number of power supplying interface chips U1, for example, when the ethernet switch is an 8-port ethernet switch and the number of power supplying interface chips U1 is 1, as shown in fig. 3, the number of the power receiving interface chips RJ45 is 7, and when the ethernet switch is an 8-port ethernet switch and the number of power supplying interface chips U1 is 2, the number of the power receiving interface chips RJ45 is 6, and so the sum of the number of the power receiving interface chips RJ45 and the number of the power supplying interface chips U1 is the number of ports of the ethernet switch; the number of the power receiving interface chips RJ45 is the same as the number of the first diodes D1.
Furthermore, in this embodiment, voltage pin Y2 of the first power receiving interface chip RJ45 is the output terminal PWR0 of the first power receiving interface unit 100, voltage pin Y2 of the second power receiving interface chip RJ45 is the output terminal PWR1 of the second power receiving interface unit 100, voltage pin Y2 of the third power receiving interface chip RJ45 is the output terminal PWR2 of the third power receiving interface unit 100, voltage pin Y2 of the fourth power receiving interface chip RJ45 is the output terminal PWR3 of the fourth power receiving interface unit 100, voltage pin Y2 of the fifth power receiving interface chip RJ45 is the output terminal PWR4 of the fifth power receiving interface unit 100, voltage pin Y2 of the sixth power receiving interface chip RJ45 is the output terminal PWR5 of the sixth power receiving interface unit 100, voltage pin Y2 of the seventh power receiving interface chip RJ45 is the output terminal PWR6 of the seventh power receiving interface unit 100, and output terminal PWR0 of the first power receiving interface unit 100, Output terminal PWR1 of the second power receiving interface unit 100, output terminal PWR2 of the third power receiving interface unit 100, output terminal PWR3 of the fourth power receiving interface unit 100, output terminal PWR4 of the fifth power receiving interface unit 100, output terminal PWR5 of the sixth power receiving interface unit 100, and output terminal PWR6 of the seventh power receiving interface unit 100 constitute a first output terminal of the power receiving module 10.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the power supply module 11 includes a power supply unit 110 and a power supply interface unit 111.
The input end of the power supply unit 110 is the input end of the power supply module 11, the output end of the power supply unit 110 is connected to the power supply interface of the power supply interface unit 111, and the data interface of the power supply interface unit 111 is the data port of the power supply module 11.
Specifically, the power supply Unit 110 receives the direct current and supplies power to the external powered device 30 through the power supply interface Unit 111, where the external powered device 30 may be a terminal device such as an IP phone, a Network camera, a Network switch, and an ONU (Optical Network Unit).
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the power supply unit 110 includes at least one second diode D2, and the power supply interface unit 111 includes at least one power supply interface chip U1.
An anode of the second diode D2 is an input end of the power supply unit 110, a cathode of the second diode D2 is an output end of the power supply unit 110, a voltage pin Y2 of the power supply interface chip U1 is a power supply interface of the power supply interface unit 111, and a data pin Y1 of the power supply interface chip U1 is a data interface of the power supply interface unit 111; it should be noted that, in this embodiment, the data pin Y1 of the power supply interface chip U1 refers to pin 1 or pin 2 of the power supply interface chip U1, or pin 3 or pin 6 of the power receiving interface chip, the voltage pin Y2 of the power supply interface chip U1 refers to pin 4 or pin 5 of the power supply interface chip U1, the pin Y3 of the power receiving interface chip U1 is grounded, and the pin Y3 refers to the ground pin 7 or ground pin 8 of the power supply chip U1.
It should be noted that, in this embodiment, the number of power sourcing interface chips U1 in the circuit shown in fig. 3 is 1, but the number of power sourcing interface chip U1 interfaces is not limited to 1, and it can be set according to the number of network ports of the ethernet switch and the number of power sourcing interface chips RJ45, for example, when the ethernet switch is an 8-port ethernet switch and the number of power sourcing interface chips RJ45 is 7, as shown in fig. 3, the number of power sourcing interface chips U1 is 1, and when the ethernet switch is an 8-port ethernet switch and the number of power sourcing interface chips RJ45 is 6, the number of power sourcing interface chips U1 is 2, and so the sum of the number of power sourcing interface chips RJ45 and the number of power sourcing interface chips U1 is the number of ports of the ethernet switch; the number of the power receiving interface chips U1 is the same as the number of the second diodes D2.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the motherboard power module 12 includes a first voltage converting unit 120 and a second voltage converting unit 121.
The input end of the first voltage conversion unit 120 is the input end of the motherboard power module 12, the output end of the first voltage conversion unit 120 is connected with the input end of the second voltage conversion unit 121, and the output end of the second voltage conversion unit 121 is the output end of the motherboard power module 12.
Specifically, the first voltage conversion unit 120 receives the direct current, performs voltage conversion on the direct current, and outputs the direct current to the second voltage conversion unit 121, and the second voltage conversion unit 121 performs voltage conversion on the direct current and outputs the working direct current; in this embodiment, the voltage of the first direct current is lower than the voltage of the direct current, and preferably, the voltage of the first direct current is 12V.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the first voltage converting unit 120 is implemented by a voltage converting chip Ax3161, a voltage input terminal Vin of the voltage converting chip Ax3161 is an input terminal of the first voltage converting unit 120, a voltage output terminal Vout of the voltage converting chip Ax3161 is an output terminal of the first voltage converting unit 120, and a ground terminal Gnd of the voltage converting chip Ax3161 is grounded; the second voltage conversion unit 121 is implemented by a voltage conversion chip AP1534, a voltage input terminal Vin of the voltage conversion chip AP1534 is an input terminal of the second voltage conversion unit 121, a voltage output terminal Vout of the voltage conversion chip AP1534 is an output terminal of the second voltage conversion unit 121, and a ground terminal Gnd of the voltage conversion chip AP1534 is grounded.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the motherboard power module 12 further includes a third voltage converting unit 122 and a fourth voltage converting unit 123.
The input end of the third voltage conversion unit 122 and the input end of the fourth voltage conversion unit 123 are both connected to the output end of the first voltage conversion unit 120, and the output end of the third voltage conversion unit 122 and the output end of the fourth voltage conversion unit 123 output the second direct current and the third direct current respectively.
Specifically, the third voltage conversion unit 122 receives the first direct current, performs voltage conversion on the first direct current, and outputs a second direct current; the fourth voltage conversion unit 123 receives the first direct current, performs voltage conversion on the first direct current, and outputs a third direct current; it should be noted that, in this embodiment, voltage values of the second direct current and the third direct current are both lower than a voltage value of the first direct current, preferably, the voltage value of the second direct current is 2.5V, the voltage value of the third direct current is 1.8V, and the 2.5V second direct current and the 1.8V third direct current can provide voltages required for operations for other operating modules on the motherboard of the ethernet switch.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the third voltage converting unit 122 and the fourth voltage converting unit 123 are both implemented by a voltage converting chip AP1534, a voltage input terminal Vin of the voltage converting chip AP1534 is an input terminal of the third voltage converting unit 122 and the fourth voltage converting unit 123, a voltage output terminal Vout of the voltage converting chip AP1534 is an output terminal of the third voltage converting unit 122 and the fourth voltage converting unit 123, and a ground terminal Gnd of the voltage converting chip AP1534 is grounded.
Further, as a preferred embodiment of the present invention, as shown in fig. 2 and fig. 4, the power receiving detection module 13 includes a plurality of power receiving detection units 130.
Wherein, the first voltage input terminals of the power receiving detection units 130 form the first input terminals of the power receiving detection module 13, the output terminals of the power receiving detection units 130 form the output terminals of the power receiving detection module 13, the second voltage input terminals of the power receiving detection units 130 form the second input terminals of the power receiving detection module 13, the second input terminals all receive working direct current, and the first voltage input terminals of each power receiving detection unit 130 are connected with the power receiving interfaces of each power receiving interface unit 100 in a one-to-one correspondence manner; in this embodiment, the number of power reception detection units 130 is the same as the number of power reception interface units 100.
Specifically, each of the power receiving detection units 130 operates on the operating direct current and outputs a detection signal according to the direct current.
Further, as a preferred embodiment of the present invention, as shown in fig. 4, each power receiving detection unit 130 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a photocoupler U2.
The first end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to form a first voltage input end of the power receiving detection unit 130, the second end of the first resistor R1 and the second end of the second resistor R2 are both connected to the first input end of the photocoupler U2, the second input end of the photocoupler U2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 is the second voltage input end of the power receiving detection unit 130, the output end of the photocoupler U2 is the output end of the power receiving detection unit 130, the output end of the photocoupler U2 is connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is grounded.
In this embodiment, the first voltage input terminal of the first power receiving detection unit 130 is connected to the output terminal PWR0 of the first power receiving interface unit 100, the first voltage input terminal of the second power receiving detection unit 130 is connected to the output terminal PWR1 of the second power receiving interface unit 100, the first voltage input terminal of the third power receiving detection unit 130 is connected to the output terminal PWR2 of the third power receiving interface unit 100, the first voltage input terminal of the fourth power receiving detection unit 130 is connected to the output terminal PWR3 of the fourth power receiving interface unit 100, the first voltage input terminal of the fifth power receiving detection unit 130 is connected to the output terminal PWR4 of the fifth power receiving interface unit 100, the first voltage input terminal of the sixth power receiving detection unit 130 is connected to the output terminal PWR5 of the sixth power receiving interface unit 100, and the first voltage input terminal of the seventh power receiving detection unit 130 is connected to the output terminal PWR7 of the seventh power receiving interface unit 100.
Further, as a preferred embodiment of the present invention, as shown in fig. 4, the control module 14 is implemented by a Central Processing Unit (CPU) with a model of TF-331, where the CPU includes a plurality of signal receiving terminals, a Medium Independent Interface (MII) and a voltage input terminal VCC, the plurality of signal receiving terminals constitute a signal input terminal of the control module 14, and the MII is a signal output terminal of the control module 14; it should be noted that, in this embodiment, the CPU TF-331 in fig. 3 only shows seven signal receiving terminals GPIO0-GPIO6, and the number of signal receiving terminals used by the CPU TF-331 is the same as the number of power receiving interface chips RJ45 and the number of power receiving detection units 130.
Further, as a preferred embodiment of the present invention, as shown in fig. 4, the switch chip 15 is implemented by a switch chip with model number RTL9309SB, the switch chip RTL9309SB includes an MII, a voltage input VCC, and eight network ports P0-P7, the MII is an input of the switch chip 15, seven network ports P0-P6 of the eight network ports P0-P7 are respectively connected to the data pins Y1 of the seven power receiving interface chips RJ45 of the power receiving interface unit 100 in a one-to-one correspondence manner, and the network port P7 is connected to the data pin Y1 of the power supply interface chip U1.
Specifically, network port P0 is connected to data pin Y1 of a first powered interface chip RJ45, network port P1 is connected to data pin Y1 of a second powered interface chip RJ45, network port P2 is connected to data pin Y1 of a third powered interface chip RJ45, network port P3 is connected to data pin Y1 of a fourth powered interface chip RJ45, network port P4 is connected to data pin Y1 of a fifth powered interface chip RJ45, network port P5 is connected to data pin Y1 of a sixth powered interface chip RJ45, and network port P6 is connected to data pin Y1 of a seventh powered interface chip RJ 45.
It should be noted that, in this embodiment, fig. 4 only shows 1 switch chip RTL9309SB, that is, the ethernet switch including the circuit shown in fig. 4 is an 8-port ethernet switch, and when the ethernet switch is 16-port or 32-port, it only needs to cascade the switch chip RTL9309SB on the basis of the power supply circuit of the ethernet switch, and accordingly change the number of the power receiving detection units 130, the number of the power receiving interface chips RJ45, and the number of the first diodes D1, and it should be noted that when changing the number of the power receiving detection units 130, the number of the power receiving interface chips RJ45, and the number of the first diodes D1, the principle that the number of the power receiving detection units 130, the number of the power receiving interface chips RJ45, and the number of the first diodes D1 are the same is needed to be followed.
The following describes the operation principle of the power receiving and supplying circuit according to the embodiment of the present invention with the circuit structures shown in fig. 3 and fig. 4, and the following details are described:
first, it should be noted that each power receiving interface chip RJ45 in fig. 3 can receive 48V dc power and data signals provided by the external power supply apparatus 20. When the first powered interface chip RJ45 connected to the network port P0 of the switch chip RTL9309SB receives the 48V dc power and the data signal provided by the external power supply device 20, the first powered interface chip RJ45 connected to the network port P0 sends the 48V dc power to and from the second diode D2 and the voltage conversion chip Ax3161 through the first diode D1 connected thereto, and the second diode D2 outputs the 48V dc power to the power supply interface chip U1, so that the power supply interface chip U1 supplies power to the external powered device 30 according to the 48V dc power, thereby implementing external power supply of the ethernet switch.
The voltage conversion chip Ax3161 converts the 48V direct current into a first 12V direct current and outputs the first 12V direct current to the voltage conversion chip AP1534, and the voltage conversion chip AP1534 converts the first 12V direct current into a working direct current of 3.3V, so as to provide working voltages to the multiple photocouplers U2, CPUTF-331 and the switch chip RTL9309SB according to the working direct current of 3.3V; moreover, the voltage conversion chip Ax3161 converts the 48V dc power into a 12V first dc power and outputs the first dc power to the other two voltage conversion chips AP1534, the other two voltage conversion chips AP1534 convert the 12V first dc power into a 2.5V second dc power and a 1.8V third dc power, respectively, and the 2.5V second dc power and the 1.8V third dc power can provide voltages required for operations of other operation modules on the motherboard of the ethernet switch.
Meanwhile, the first power receiving interface chip RJ45 connected to the network port P0 transmits the 48V dc power to the photocoupler U2 in the first power receiving detection unit 130 connected thereto, the photocoupler U2 triggers the internal phototube to emit light according to the 48V dc power, so that the switching tube in the photocoupler U2 is turned on, thereby outputting a detection signal to the signal receiving end GPIO0 of the CPUTF-331, after the signal receiving end GPIO0 of the CPUTF-331 detects the detection signal, the detection signal is processed to output a corresponding control signal, and the control signal is output to the MII of the switch chip RTL9309SB through the MII, the switch chip RTL93 9309SB can recognize the control signal of the CPUTF-331, and according to the control signal, the network port P0 is controlled to be turned on, and at the same time, the other network ports P1-P6 are controlled to be turned off continuously, so that the network port P0 can transmit the data signal received by the RJ45 connected to the external device; it should be noted that, in this embodiment, the network ports P0-P7 in the switch chip RTL9309SB are all turned off in the initial state, and only when the power receiving interface chip RJ45 connected to the network port receives the direct current provided by the external power supply device, the corresponding network port is turned on to perform communication, otherwise, the network port is turned off continuously. It should be noted that the working process of the power receiving interface chip RJ45 connected to the other network ports of the switch chip RTL9309SB is the same as the working process of the power receiving interface chip RJ45 connected to the network port P0 of the switch RTL9309SB, and is not described herein again; in addition, the power receiving and supplying circuit of the ethernet switch shown in this embodiment is not limited to that only one power receiving interface chip RJ45 receives the 48V working direct current provided by the user and the data signal provided by the external circuit at a time, that is, the power receiving and supplying circuit of the ethernet switch shown in this embodiment at least includes one power receiving interface chip RJ45 to receive the 48V working direct current provided by the user and the data signal provided by the external circuit at a time, and performs corresponding processing on the received signals.
In this embodiment, the powered power supply circuit provided by this embodiment adopts the first diode D1 to replace a plurality of powered chips in the existing ethernet switch, and adopts the second diode D2 to replace a power supply chip in the existing ethernet switch, so that the circuit structure of the powered power supply circuit for the ethernet switch provided by this embodiment is simple in structure and low in cost compared with the powered power supply circuit for the existing ethernet switch, thereby solving the problems of complex circuit structure and high cost of the existing ethernet switch.
In addition, the power receiving and supplying circuit provided in this embodiment uses the power receiving detection module 13 of the photo-electric coupler U2, so that the photo-electric coupler U2 outputs a corresponding detection signal to the CPU according to the 48 dc output by the power receiving interface chip RJ45, so that the CPU converts the detection signal and outputs a corresponding on or off control signal to the switch chip RTL9309SB, and the switch chip RTL9309SB controls the corresponding network port to be opened or closed according to the on or off control signal, so as to control communication, thereby realizing port control and solving the problem that the non-power-supply network port of the existing ethernet switch is uncontrollable.
Further, an embodiment of the present invention further provides an ethernet switch, where the ethernet switch includes the above powered power supply circuit.
In the invention, by adopting a power receiving and supplying circuit comprising a power receiving module 10, a power supply module 11, a mainboard power supply module 12, a power receiving detection module 113, a control module 14 and a switch chip 15, the power receiving module 10 sends direct current to the power supply module 11, the mainboard power supply module 12 and the power receiving detection module 13, and sends data to the switch chip 15; the power supply module 11 supplies power to the external power receiving apparatus 30 according to the direct current; the main board power supply module 12 converts the voltage of the direct current and supplies power to the power receiving detection module 13, the control module 14 and the switch chip 15; the power receiving detection module 13 outputs a detection signal to the control module 14 according to the direct current; control module 14 handles back output control signal to switch chip 15 to the detected signal, switch chip 15 discernment control signal, and break-make according to control signal control network port, in order to send data to outside powered device 30 through power module 11, because this circuit detects the power receiving condition of ethernet switch through receiving power detection module 13, and then make switch chip 15's network port controllable, and this circuit need not to use a plurality of power supply chips and powered chip, moreover, the steam generator is simple in structure, and is with low costs, it has circuit structure complicacy to have solved current POE switch, the fault rate is high, with high costs and the uncontrollable problem of non-power supply network port.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A powered power supply circuit for an ethernet switch, the powered power supply circuit being connected to an external power sourcing equipment and an external powered device, the powered power supply circuit comprising:
the power receiving module, the power supply module, the mainboard power supply module, the power receiving detection module, the control module and the switch chip are arranged in the shell;
the data port of the power receiving module is connected with the network port of the switch chip, and the output end of the power receiving module is connected with the input end of the power supply module, the input end of the mainboard power supply module and the first input end of the power receiving detection module; the data port of the power supply module is connected with the network port of the switch chip; the output end of the mainboard power supply module is connected with the second input end of the power receiving detection module, the voltage input end of the control module and the voltage input end of the switch chip; the output end of the power receiving detection module is connected with the signal input end of the control module; the signal output end of the control module is connected with the signal input end of the switch chip;
the power receiving module receives direct current and data provided by the external power supply equipment and sends the direct current to the power supply module, the mainboard power supply module and the power receiving detection module; the power supply module supplies power to the external powered device according to the direct current; the mainboard power supply module performs voltage conversion on the direct current and supplies power to the power receiving detection module, the control module and the switch chip according to the converted working direct current; the power receiving detection module outputs a detection signal to the control module according to the direct current; the control module processes the detection signal and then outputs a control signal, the switch chip identifies the control signal and controls the on-off of a corresponding network port according to the control signal so as to send the data received by the power receiving module to the external power receiving equipment through the power supply module;
wherein, the power receiving module includes a plurality of power receiving interface units, the power receiving detection module includes a plurality of power receiving detection units, the power receiving interface units are connected with the same number and one-to-one correspondence of the power receiving detection units, the data interface of the power receiving interface units is the data port of the power receiving module, and the power receiving interface units output direct current to the power receiving detection module.
2. The powered power supply circuit of claim 1, wherein the powered module further comprises a powered unit;
the power receiving interface of the power receiving interface unit is connected with the input end of the power receiving unit, and the output end of the power receiving unit and the power receiving interface of the power receiving interface unit form the output end of the power receiving module;
the power receiving unit receives the direct current provided by the external power supply equipment through the power receiving interface unit, the direct current is sent to the power supply module and the mainboard power supply module, and the power receiving interface unit sends the data to the switch chip.
3. The powered power supply circuit of claim 2, wherein the powered interface unit comprises a plurality of powered interface chips, the powered unit comprising a plurality of first diodes;
it is a plurality of receive the data pin of power interface chip and constitute receive power interface unit's data interface, it is a plurality of receive power interface chip's voltage pin and constitute receive power interface unit's receive power interface, it is a plurality of the positive pole of first diode is constituteed receive power unit's input, it is a plurality of the negative pole of first diode is constituteed receive power unit's output, every receive power interface chip's voltage pin and every receive power interface chip's positive pole one-to-one connection.
4. The powered power supply circuit of claim 1, wherein the power supply module comprises a power supply unit and a power supply interface unit;
the input end of the power supply unit is the input end of the power supply module, the output end of the power supply unit is connected with the power supply interface of the power supply interface unit, and the data interface of the power supply interface unit is the data port of the power supply module;
the power supply unit receives the direct current and supplies power to the external powered device through the power supply interface unit.
5. The powered supply circuit of claim 4, wherein the power supply unit comprises at least one second diode, and wherein the power supply interface unit comprises at least one power supply interface chip;
the anode of the second diode is the input end of the power supply unit, the cathode of the second diode is the output end of the power supply unit, the voltage pin of the power supply interface chip is the power supply interface of the power supply interface unit, and the data pin of the power supply interface chip is the data interface of the power supply interface unit.
6. The powered power supply circuit of claim 1, wherein the motherboard power module comprises a first voltage conversion unit and a second voltage conversion unit;
the input end of the first voltage conversion unit is the input end of the mainboard power supply module, the output end of the first voltage conversion unit is connected with the input end of the second voltage conversion unit, and the output end of the second voltage conversion unit is the output end of the mainboard power supply module;
the first voltage conversion unit receives the direct current and outputs a first direct current to the second voltage conversion unit after voltage conversion is carried out on the direct current, and the second voltage conversion unit outputs the working direct current after voltage conversion is carried out on the first direct current.
7. The powered circuit of claim 6, wherein the motherboard power module further comprises a third voltage conversion unit and a fourth voltage conversion unit;
the input ends of the third voltage conversion unit and the fourth voltage conversion unit are connected with the output end of the first voltage conversion unit, and the output end of the third voltage conversion unit and the output end of the fourth voltage conversion unit output a second direct current and a third direct current respectively;
the third voltage conversion unit receives the first direct current, performs voltage conversion on the first direct current, and outputs a second direct current; the fourth voltage conversion unit receives the first direct current, converts the voltage of the first direct current and outputs a third direct current.
8. The powered power supply circuit of claim 3, wherein:
the first voltage input ends of the plurality of power receiving detection units form the first input ends of the power receiving detection modules, the output ends of the plurality of power receiving detection units form the output ends of the power receiving detection modules, the second voltage input ends of the plurality of power receiving detection units form the second input ends of the power receiving detection modules, and the first voltage input ends of the power receiving detection units are connected with the voltage pins of the power receiving interface chips in a one-to-one correspondence manner;
and each power receiving detection unit works according to the working direct current and outputs a detection signal according to the direct current.
9. The power receiving and supplying circuit according to claim 8, wherein each of the power receiving detection units includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a photocoupler;
the first end of first resistance with the first end of second resistance connects jointly and forms the first voltage input end of received power detecting element, the second end of first resistance with the second end of second resistance all with optoelectronic coupler's first input end is connected, optoelectronic coupler's second input with the first end of third resistance is connected, the second end of third resistance does the second voltage input end of received power detecting element, optoelectronic coupler's output does the output of received power detecting element, optoelectronic coupler's output with the first end of fourth resistance is connected, the second end ground connection of fourth resistance.
10. An ethernet switch, characterized in that it comprises a powered power supply circuit according to any of claims 1 to 9.
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| CN201610685638.2A CN106101028B (en) | 2016-08-18 | 2016-08-18 | Ethernet switch and power receiving and supplying circuit thereof |
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| CN201610685638.2A CN106101028B (en) | 2016-08-18 | 2016-08-18 | Ethernet switch and power receiving and supplying circuit thereof |
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| CN106101028A CN106101028A (en) | 2016-11-09 |
| CN106101028B true CN106101028B (en) | 2022-06-28 |
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| CN109428726B (en) * | 2017-08-28 | 2022-07-26 | 华为技术有限公司 | Port adaptive method and device |
| CN111722029B (en) * | 2019-03-21 | 2023-03-07 | 杭州海康威视数字技术股份有限公司 | Detection device and method for power supply mode of network camera and network camera |
| CN114264868B (en) * | 2021-11-30 | 2023-10-20 | 深圳飞音时代网络通讯技术有限公司 | Detection circuit and method of power receiving end equipment |
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