CN109257533B - Networking power supply device for camera and camera equipment - Google Patents
Networking power supply device for camera and camera equipment Download PDFInfo
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- CN109257533B CN109257533B CN201810213176.3A CN201810213176A CN109257533B CN 109257533 B CN109257533 B CN 109257533B CN 201810213176 A CN201810213176 A CN 201810213176A CN 109257533 B CN109257533 B CN 109257533B
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- 230000006855 networking Effects 0.000 title claims abstract description 40
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 103
- 239000003381 stabilizer Substances 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 102100028175 Abasic site processing protein HMCES Human genes 0.000 description 1
- 102100040999 Catechol O-methyltransferase Human genes 0.000 description 1
- 108020002739 Catechol O-methyltransferase Proteins 0.000 description 1
- 101100275316 Danio rerio comtb gene Proteins 0.000 description 1
- 101001006387 Homo sapiens Abasic site processing protein HMCES Proteins 0.000 description 1
- 101000615747 Homo sapiens tRNA-splicing endonuclease subunit Sen2 Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 102100021774 tRNA-splicing endonuclease subunit Sen2 Human genes 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
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Abstract
The invention relates to a networking power supply device for cameras and camera equipment, wherein the device comprises: the power receiving end PD circuit, the power supply end PSE circuit, the direct current voltage stabilizing circuit and the switch; the PD circuit is connected with the PSE circuit, the direct current voltage stabilizing circuit and the switch respectively, the direct current voltage stabilizing circuit is connected with the camera and the switch respectively, and the switch is connected with the camera and the PSE circuit respectively. According to the invention, the PoE technology is utilized, so that each networking power supply device can provide power for the camera and can perform data transmission, and each networking power supply device can be connected in series, so that each camera device can be connected in series into a complete networking power supply system of the camera device by using one network cable, the simultaneous same-line transmission of power and data is realized, and the construction difficulty and cost are greatly reduced.
Description
Technical Field
The invention relates to a camera power supply scheme and a networking scheme, in particular to a networking power supply device for a camera and camera equipment.
Background
Along with the popularization of camera technology, a camera networking system and construction wiring become an item to be optimized, wherein wiring through a switch network and a DC12 power supply becomes a main stream system, and the networking and power supply wiring mode needs two cables and comprises the following steps: the construction cost and the networking complexity are multiplied along with the increase of the number of cameras in the networking system.
Disclosure of Invention
Aiming at the technical problems, the invention provides a networking power supply device for a camera and camera equipment.
The technical scheme for solving the technical problems is as follows: a networking power supply device for a camera, comprising: the power receiving end PD circuit, the power supply end PSE circuit, the direct current voltage stabilizing circuit and the switch;
the PD circuit is respectively connected with the PSE circuit, the direct current voltage stabilizing circuit and the switch, the direct current voltage stabilizing circuit is respectively connected with the camera and the switch, and the switch is respectively connected with the camera and the PSE circuit;
the PD circuit is used for separating an externally input active Ethernet PoE signal into a power part and a network data part, the direct current voltage stabilizing circuit is used for converting the power part and then supplying power to the camera and the switch, the switch is used for exchanging data with the camera and the PSE circuit, and the PSE circuit is used for mixing the network data input by the power part and the switch into the PoE signal and outputting the PoE signal.
In order to achieve the above purpose, the invention also provides a camera device, which comprises a camera and the networking power supply device.
The beneficial effects of the invention are as follows: by using PoE technology, each networking power supply device can provide power for cameras and can perform data transmission, and each networking power supply device can be connected in series, so that each camera device can be connected in series into a complete networking power supply system of the camera device by using one network cable, the power and the data are transmitted in the same line, and the construction difficulty and cost are greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a connection structure for networking power supply of cameras in the prior art;
fig. 2 is a schematic diagram of a connection structure of networking power supply of a single camera in the prior art;
fig. 3 is a schematic diagram of a connection structure of a networking power supply device for a camera according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a connection structure of a networking power supply system formed by a PoE switch and a plurality of camera devices according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a PD circuit according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a switching power supply and a DC regulated power supply according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a switch according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a PSE circuit according to an embodiment of the invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Before understanding the present invention, it is necessary to understand the power supply mode of the camera networking in the prior art, as shown in fig. 1, in the prior art, the camera networking needs to connect two parts of a switch and a power supply with each camera through a network cable and a power cable. The connection mode can lead each camera to not affect each other, but the pressure on a data port of the switch and wires is large.
Fig. 2 is a schematic diagram of a connection structure of networking power supply of a single camera, and as can be seen from fig. 2, power supply and data transmission are performed separately, and the implementation function is relatively simple. The power supply uses a power chip to convert DC12V into two voltages of 5V and 3.3V to power the corresponding circuits. The camera module is connected with an external switch through an on-board switch chip by using a network cable. The most basic functions of the camera are image acquisition, processing, analysis, indication lamp adjustment and interaction between the camera and a server, and the cameras on the market can meet the requirements of the basic functions, but in order to meet the requirements, a plurality of network ports are reserved for the switch, so that the cost is greatly increased, and each camera is required to be additionally thrown with wires for power supply.
The following describes the technical scheme of the embodiment of the invention in detail.
Fig. 3 is a schematic diagram of a connection structure of a networking power supply device for a camera according to an embodiment of the present invention, where, as shown in fig. 3, the device includes: the power receiving end PD circuit, the power supply end PSE circuit, the direct current voltage stabilizing circuit and the switch;
the PD circuit is respectively connected with the PSE circuit, the direct current voltage stabilizing circuit and the switch, the direct current voltage stabilizing circuit is respectively connected with the camera and the switch, and the switch is respectively connected with the camera and the PSE circuit;
the PD circuit is used for separating an externally input active Ethernet PoE signal into a power part and a network data part, the direct current voltage stabilizing circuit is used for converting the power part and then supplying power to the camera and the switch, the switch is used for exchanging data with the camera and the PSE circuit, and the PSE circuit is used for mixing the network data input by the power part and the switch into the PoE signal and outputting the PoE signal.
Optionally, in this embodiment, the dc voltage stabilizing circuit includes a dc voltage stabilizing power supply for powering the switch and a switching power supply for powering the camera and the dc voltage stabilizing power supply;
the switch power supply is respectively connected with the PD circuit, the camera and the direct-current stabilized power supply, and the direct-current stabilized power supply is also connected with the switch.
Specifically, as shown in fig. 3, the internal part of the networking power supply device is divided into two parts, namely a system power supply part and a data part. The front-stage equipment provides a PoE network cable which has two functions of network cable and power supply, the PoE network cable is connected to the interface of the switch, and each networking power supply device forms a network through the switch. And a network cable prepared for connection with the next-stage networking power supply device is connected from the other interface of the switch. The power portion of PoE is converted to a 48V power supply by the PD circuitry. The 48V power supply is converted into 5V through a switching power supply and supplies power to the camera module, and is converted into 3.3V power supply through a direct-current stabilized power supply and supplies power to equipment such as a switch. In turn, 48V generates a PoE power segment meeting the ieee802.3af/at standard via the PSE circuitry, and utilizes PoE network transformers in the PSE circuitry to mix the PoE power segment with the data portion of the switch into a PoE network interface for connection to the next-level networking power sourcing equipment. And the three ports of the switch are respectively connected with the front-stage equipment, the rear-stage equipment and the camera module.
In the embodiment of the invention, each networking power supply device of each camera is provided with a PD circuit (PoE input circuit) and a PSE circuit (PoE output circuit), so that each networking power supply device can provide power for the camera and can perform data transmission, and each networking power supply device can be connected in series, as shown in fig. 4, a PoE switch and each camera device can be connected in series through one network cable to form a complete networking power supply system of the camera device.
The PoE power supply networking mode ensures that one network cable has the dual functions of power supply and data, thereby greatly saving the cost of cables and eliminating the need of providing other power supplies. The device can adopt a standard PoE transmission mode, so that gigabit network port access can be adopted, and a switch cannot be burnt. In addition, poE has a transmission distance of 100 meters and no attenuation, which also allows longer distances between devices.
The technical scheme is technically innovative aiming at the problems that the wiring of cameras in the field is difficult and the power transmission mode is complex in the market, and the networking power supply device with the PoE function is integrated in the camera equipment, so that the camera equipment is changed into a system which can be connected by only one network cable, and networking and power transmission can be realized by connecting the network cables in series. The construction difficulty and cost are greatly reduced, the total power of a single camera device is not more than 5W through the optimization of the system, the power consumption provided by the network port of a single PoE switch is limited, and the low power consumption of the camera device enables the single switch port to be connected with a plurality of camera devices in series. In the actual construction process, taking a 384 watt 24-port PoE switch as an example, the switch can form 76 camera devices into a network and supply power.
The circuit structure of each constituent circuit in the networking power supply device is specifically described below.
Optionally, in this embodiment, as shown in fig. 5, the PD circuit includes a first socket P5, a rectifier bridge D6, a first capacitor C29, a second capacitor C15, a third capacitor C11, a first diode D7, a second diode D3, a first resistor R47, a second resistor R45, a third resistor R49, a first power transistor Q2, a power receiving end PD controller U4, and a first network transformer U7;
the first signal input pin 3, the second signal input pin 4, the first signal output pin 5 and the second signal output pin 6 of the first socket P5 are respectively connected with the first signal input pin 16, the second signal input pin 14, the first signal output pin 11 and the second signal output pin 9 of the first network transformer,
the first data input pin 1, the second data input pin 3, the first data output pin 6 and the second data output pin 8 of the first network transformer are all connected with the switch, the first power output pin 10 and the second power output pin 15 of the first network transformer are respectively and correspondingly connected with the first input terminal COMTB and the second input terminal COMT of the rectifier bridge,
the first output end of the rectifier bridge is respectively connected with the first end of the first capacitor C29, the first end of the second capacitor C15, the first end of the first resistor R47, the first end of the third capacitor C11, the first end of the second resistor R45, the anode of the first diode D7, the pin 1 of the VDD pin 1 of the PD controller and the power supply end +48V of the PD circuit,
the second end of the first resistor R47 is connected to the DEN pin 2 of the PD controller, the second end of the third capacitor C11 is connected to the RTN pin 5 of the PD controller, the anode of the second diode D3 and the source of the first power transistor Q2, the cathode of the second diode D3 is connected to the CDB pin 6 of the PD controller, the second end of the second resistor R45 and the gate of the first power transistor Q2, the drain of the first power transistor Q2 is grounded, and the second output end of the rectifier bridge D6 is connected to the first capacitor C29, the first diode D7, the second end of the second capacitor C15, the first end of the third resistor C49, the VSS pin 4 of the PD controller and the PWPD pin 9, respectively, and the second end of the third resistor R49 is connected to the CLS pin 3 of the PD controller.
Specifically, the system selects a TPS2378DDA chip of TI company as PD equipment, namely, the TPS2378DDA chip is used for obtaining the power in the PoE network cable. A DC48V power supply was generated using TPS2378 DDA. U4 is the basic circuit of the overall PD system. P5 is the interface of the PoE network cable and connects the network data part to the switch chip and the power part to the two input pins of the rectifier bridge (D6) via the network transformer chip HLL20 NL. D6 transmits power meeting the ieee802.3af/at standard to U4 by rectification, and when the front stage detects that U4 is a PD device meeting the ieee802.3af/at standard, power is transmitted to pins 1 and 4,9 of U4 via the network cable at a different frequency from the network cable data communication. U4 generates a 48V power supply using the entire circuit. The 48V power supply provides power to the entire circuit that follows and transfers power to the next stage through the PSE circuitry.
Alternatively, in this embodiment, as shown in fig. 6, the switching power supply includes a fourth capacitor C3, a fifth capacitor C5, a sixth capacitor C7, a seventh capacitor C6, an eighth capacitor C4, a ninth capacitor C2, a fourth resistor R7, a fifth resistor R8, a sixth resistor R15, a seventh resistor R14, an eighth resistor R13, a ninth resistor R9, a third diode D1, a first inductor L1, and a first voltage regulator U1;
the first end of the fourth capacitor C3 is respectively connected with the power supply end +48V of the PD circuit, the first end of the fourth resistor R7 and the VIN pin 2 pin of the first voltage stabilizer U1, the second end of the fourth capacitor C3 is connected to the first end of the fifth resistor R8, the first end of the fifth capacitor C5, the first end of the sixth capacitor C7, the first end of the seventh capacitor C6, the first end of the sixth resistor R15, the first end of the seventh resistor R14, the first end of the eighth capacitor C4, and the GND pin 9 pin of the first voltage regulator U1, the second end of the fourth resistor R7 is respectively connected with the second end of the fifth resistor R8 and the pin EN pin 3 of the first voltage stabilizer U1, the second end of the fifth capacitor C5 is connected to the first end of the eighth resistor R13 and the COMP pin 8 pin of the first voltage stabilizer U1, a second end of the eighth resistor R13 is connected with a second end of the sixth capacitor C7, a second end of the seventh capacitor C6 is connected with the pin 4 of the SS/TR pin of the first voltage stabilizer U1, a second end of the sixth resistor R15 is connected with the pin 5 of the RT/CLK pin of the first voltage stabilizer U1, the second end of the seventh resistor R14 is connected to the pin of the VSENSE pin 7 of the first voltage regulator U1 and the first end of the ninth resistor R9, the second end of the ninth resistor R9 is respectively connected with the first end of the first inductor L1, the second end of the eighth capacitor C4 and the power supply end VCC5V of the switching power supply, the second end of the first inductor L1 is connected to the cathode of the third diode D1, the pin 10 of the PH pin of the first voltage stabilizer U1, and the first end of the ninth capacitor C2, the anode of the third diode D1 is grounded, and the second end of the ninth capacitor C2 is connected to the foot of the BOOT pin 1 of the first voltage regulator U1.
The direct-current stabilized power supply comprises a tenth capacitor C31, an eleventh capacitor C32, a twelfth capacitor C33, a second inductor BD1 and a second voltage stabilizer U6;
the first end of the tenth capacitor C31 is connected with the power supply end of the switching power supply and the Vin pin 3 of the second voltage regulator U6, the second end of the tenth capacitor C31 is connected with the GND pin 1 of the second voltage regulator U6, the first end of the eleventh capacitor C32 and the first end of the twelfth capacitor C33, and then grounded, and the second end of the eleventh capacitor C32 is connected with the Vout pin 2 of the second voltage regulator, the first power supply end DVDD3.3V of the dc voltage regulator and the first end of the second inductor BD1, and the second end of the twelfth capacitor C33 is connected with the second end of the second inductor BD1 and the second power supply end AVDD3.3V of the dc voltage regulator.
Specifically, the DC regulated power supply uses TPS54260 (U1) from TI to perform DC48V to DC5V conversion, and U1 and surrounding circuitry perform this function. In order to meet the condition that non-PoE input is common DC12V input, a TPS5430 (U5) is used for converting DC12V into a DC5V chip in the camera, and the functions of PoE connection and common DC12V+ network cable double connection can be achieved. Finally, the LM1117-3.3V is utilized to convert DC5V into stable DC3.3V, so that the power can be supplied to circuits such as a switch and the like, and the DC5V also supplies power to the camera module.
Alternatively, in this embodiment, as shown in fig. 7, the switch includes a second socket P1, a second network transformer U9, a switch chip U8, a thirteenth capacitor C41, a fourteenth capacitor 42, a fifteenth capacitor 46, a sixteenth capacitor C47, and a crystal oscillator Y1;
the RXON 1 pin 3, RXON 1 pin 2, TXON1 pin 4 and TXOP1 pin 5 of the switch chip U8 are respectively connected with the first data input pin 1, the second data input pin 3, the first data output pin 6 and the second data output pin 8 of the first network transformer U7, the TXOP2 pin, TXON2 pin, RXOP 2 pin and RXON 2 pin of the switch chip U8 are respectively connected with the PSE circuit, the TXOP3 pin, TXON3 pin, RXOP 3 pin and RXON 3 pin of the switch chip U8 are respectively connected with the first data output pin 9, the second data output pin 11, the first data input pin 14 and the second data input pin 16 of the second network transformer U9, the first signal input pin 1, the second signal input pin 3, the first signal output pin 6 and the second signal output pin 8 of the second network transformer U9 are respectively connected with the first signal input pin 4, the second signal input pin 3, the first signal output pin 2 and the second signal output pin 1 of the second socket P1, the V33IN pin 37 and the DVDDH pin 31 of the switch chip U8 are respectively connected with the first power supply end DVDD3.3V of the dc regulated power supply, the avddll pin 38 and the AVDDH pins 6, 8, 18 and 48 of the switch chip U8 are respectively connected with the second power supply end AVDD3.3V of the dc regulated power supply, the V33IN pin 37 of the switch chip U8 is respectively connected with the thirteenth capacitor C41 and the first end of the fourteenth capacitor C42, the second end of the thirteenth capacitor C41 and the second end of the fourteenth capacitor C42 are respectively grounded, the switch chip U8 is respectively connected with the first end 46 of the thirteenth capacitor C1 and the fifteenth capacitor C46, the pin X1 of the switch chip U8 is connected to the second end of the crystal oscillator Y1 and the first end of the sixteenth capacitor C47, and the second end of the sixteenth capacitor C47 is grounded.
Specifically, three network interfaces led out by the switch chip RTL8305NB are utilized to form each device into a network. The U9 is a network switch, and three network signals are respectively four data lines TXOP1, TXON1, RXIP1 and RXIN1 connected with the PoE input, four data lines TTXOP2, TXON2, RXIP2 and RXIN2 connected with the PoE output, and four data lines TXOP3, TXON3, RXIP3 and RXIN3 connected with the camera module. Wherein TXOP1, TXON1, RXIP1, RXIN1, TXOP2, TXON2, RXIP2, RXIN2 are normal data lines in the non-PoE mode. The two sets of data lines are functionally differentiated only when the PoE function is enabled, and the two sets of data lines are functionally identical in the non-PoE mode. And D9, D10, D11 are data indicator lights of three network interfaces. Y1 is the crystal oscillator of the exchanger chip. U8 is the entire switch base circuit.
Optionally, in this embodiment, as shown in fig. 8, the PSE circuit includes a third socket P2, a third network transformer U3, a second power transistor Q1, a PSE chip U2, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a third diode, and a key switch;
the first signal input pin 3, the second signal input pin 4, the first signal output pin 5 and the second signal output pin 6 of the third socket P2 are respectively connected with the first signal input pin 1, the second signal input pin 3, the first signal output pin 6 and the second signal output pin 8 of the third network transformer U3, the first data input pin 14, the second data input pin 16, the first data output pin 9 and the second data output pin 11 of the third network transformer U3 are respectively connected with the RXIP2 pin 12, the RXIN2 pin 11, the TXOP2 pin 9 and the TXON2 pin 10 of the switch chip U8, the VDD pin 1 of the PSE chip U2 is respectively connected with the first power supply terminal DVDD3.3V of the dc voltage regulator, the first terminal of the eleventh resistor R17 and the first terminal of the seventeenth capacitor C8, the second end of the seventeenth capacitor C8 is grounded, the RESET pin 2 of the PSE chip U2 is connected to the second end of the eleventh resistor R17 and the first end of the push switch S1, the second end of the push switch S2 is grounded, the VPWR pin 28 of the PSE chip U2 is connected to the power supply +48v of the PD circuit and the first end of the eighteenth capacitor C9, the second end of the eighteenth capacitor C9 is grounded, the GATE2 pin 21 of the PSE chip U2 is connected to the GATE 4 of the second power transistor Q1, the DRAIN2 pin 20 of the PSE chip U2 is connected to the first end of the twelfth resistor R18, the second end of the twelfth resistor R18 is connected to the anode of the third diode D2, the DRAINs 5, 6, 7, 8 pins of the second power transistor Q1, the first end of the nineteenth capacitor C10, the first power input pin 10 of the third network transformer U3 is connected to the pin 19 of the SEN2 of the PSE chip U2 and the first end of the thirteenth resistor R34, the second end of the thirteenth resistor R34 is connected to the first ends of the sources 1, 2 and 3 pins of the second power transistor Q1, the fourteenth resistor R35 and the fifteenth resistor R44, the second ends of the fourteenth resistor R35 and the fifteenth resistor R44 are connected to ground, the second power input pin 15 of the third network transformer U3 is connected to the +48v of the power supply end of the PD circuit, and the pin 24 of the SHTDWN of the PSE chip U2 is connected to the first power supply end DVDD3.3V of the dc regulated power supply.
Specifically, the PSE circuit generates PoE standard electrical signals using a TPS23861 (U2) chip, where U2 and Q1 form a power supply system, and the power supply signals are mixed into the network data signals via H1188NL (U3), and finally a standard PoE network signal is output by the P2 network interface socket.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A networking power supply device for a camera, comprising: the power receiving end PD circuit, the power supply end PSE circuit, the direct current voltage stabilizing circuit and the switch;
the PD circuit is connected with the PSE circuit, the PD circuit is also connected with the switch through the direct current voltage stabilizing circuit, the direct current voltage stabilizing circuit is respectively connected with the camera and the switch, and the switch is respectively connected with the camera and the PSE circuit;
the PD circuit is used for separating an externally input active Ethernet PoE signal into a power part and a network data part, the direct current voltage stabilizing circuit is used for converting the power part and then supplying power to the camera and the switch, the switch is used for exchanging data with the camera and the PSE circuit, and the PSE circuit is used for mixing the network data input by the power part and the switch into a PoE signal and outputting the PoE signal;
the direct-current voltage stabilizing circuit comprises a direct-current voltage stabilizing power supply for supplying power to the switch and a switching power supply for supplying power to the camera and the direct-current voltage stabilizing power supply;
the switch power supply is respectively connected with the PD circuit, the camera and the direct-current stabilized power supply, and the direct-current stabilized power supply is also connected with the switch;
the PD circuit outputs 48V to the switch power supply, the switch power supply converts 48V into 5V and supplies power to the camera, and then the switch power supply converts the power into 3.3V power through the direct-current stabilized power supply;
the PD circuit comprises a first socket, a rectifier bridge, a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a first power transistor, a power receiving end PD controller and a first network transformer;
the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the first socket are respectively connected with the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the first network transformer,
the first data input pin, the second data input pin, the first data output pin and the second data output pin of the first network transformer are all connected with the switch, the first power output pin and the second power output pin of the first network transformer are respectively and correspondingly connected with the first input end and the second input end of the rectifier bridge,
the first output end of the rectifier bridge is respectively connected with the first end of the first capacitor, the first end of the second capacitor, the first end of the first resistor, the first end of the third capacitor, the first end of the second resistor, the anode of the first diode, the VDD pin of the PD controller and the power supply end of the PD circuit,
the second end of the first resistor is connected with the DEN pin of the PD controller, the second end of the third capacitor is respectively connected with the RTN pin of the PD controller, the anode of the second diode and the source electrode of the first power transistor, the cathode of the second diode is respectively connected with the CDB pin of the PD controller, the second end of the second resistor and the grid electrode of the first power transistor, the drain electrode of the first power transistor is grounded, and the second output end of the rectifier bridge is respectively connected with the first capacitor, the first diode, the second end of the second capacitor, the first end of the third resistor, the VSS pin and the PWPD pin of the PD controller, and the second end of the third resistor is connected with the CLS pin of the PD controller.
2. The apparatus of claim 1, wherein the switching power supply comprises a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third diode, a first inductor, and a first voltage regulator;
the first end of the fourth capacitor is respectively connected with the power supply end of the PD circuit, the first end of the fourth resistor and the VIN pin of the first voltage stabilizer, the second end of the fourth capacitor is respectively connected with the first end of the fifth resistor, the first end of the fifth capacitor, the first end of the seventh capacitor, the first end of the sixth resistor, the first end of the seventh resistor, the first end of the eighth capacitor and the GND pin of the first voltage stabilizer, the second end of the fourth resistor is respectively connected with the second end of the fifth resistor and the EN pin of the first voltage stabilizer, the second end of the fifth capacitor is respectively connected with the first end of the eighth resistor and the COMP pin of the first voltage stabilizer, the second end of the eighth resistor is connected with the second end of the sixth capacitor, the second end of the seventh capacitor is connected with the SS/TR pin of the first voltage stabilizer, the second end of the sixth resistor is connected with the GND pin of the first voltage stabilizer, the second end of the fourth resistor is respectively connected with the second end of the first resistor and the GND pin of the ninth resistor, the second end of the fourth resistor is respectively connected with the first end of the fourth resistor, the ninth resistor is respectively connected with the fourth end of the fourth resistor and the power supply pin of the ninth resistor, the ninth resistor is respectively connected with the fourth end of the fourth resistor and the ninth resistor.
3. The apparatus of claim 2, wherein the dc regulated power supply comprises a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a second inductor, and a second regulator;
the first end of the tenth capacitor is connected with the power supply end of the switching power supply and the Vin pin of the second voltage stabilizer respectively, the second end of the tenth capacitor is connected with the GND pin of the second voltage stabilizer, the first end of the eleventh capacitor and the first end of the twelfth capacitor respectively and then grounded, the second end of the eleventh capacitor is connected with the Vout pin of the second voltage stabilizer, the first power supply end of the direct-current voltage-stabilized power supply and the first end of the second inductor respectively, and the second end of the twelfth capacitor is connected with the second end of the second inductor and the second power supply end of the direct-current voltage-stabilized power supply respectively.
4. The apparatus of claim 3, wherein the switch comprises a second socket, a second network transformer, a switch chip, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a crystal oscillator, and a tenth resistor;
the RXIP1 pin, RXON 1 pin, TXON1 pin and TXOP1 pin of the switch chip are respectively connected with the first data input pin, the second data input pin, the first data output pin and the second data output pin of the first network transformer, the TXOP2 pin, TXON2 pin, RXIP2 pin and RXON 2 pin of the switch chip are respectively connected with the PSE circuit, the TXOP3 pin, TXON3 pin, RXOP 3 pin and RXON 3 pin of the switch chip are respectively connected with the first data output pin, the second data output pin, the first data input pin and the second data input pin of the second network transformer, the first signal input pin, the second signal input pin and the second signal output pin of the second network transformer are respectively connected with the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the second socket, the V33IN pin and the DVDDH pin of the switch chip are connected with the first power supply end of the direct current stabilized power supply, the AVDDHPLL pin and the AVDDH pin of the switch chip are connected with the second power supply end of the direct current stabilized power supply, the V33IN pin of the switch chip is also connected with the first ends of the thirteenth capacitor and the fourteenth capacitor respectively, the second ends of the thirteenth capacitor and the fourteenth capacitor are grounded respectively, the X0 pin of the switch chip is connected with the first ends of the crystal oscillator and the fifteenth capacitor respectively, the second end of the fifteenth capacitor is grounded, the X1 pin of the switch chip is connected with the second end of the crystal oscillator and the first end of the sixteenth capacitor respectively, and the second end of the sixteenth capacitor is grounded.
5. The apparatus of claim 4, wherein the PSE circuitry comprises a third receptacle, a third network transformer, a second power transistor, a PSE chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a third diode, and a key switch;
the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the third socket are respectively connected with the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the third network transformer, the first data input pin, the second data input pin, the first data output pin and the second data output pin of the third network transformer are respectively connected with the RXIP2 pin, the RXIN2 pin, the TXOP2 pin and the TXON2 pin of the switch chip, the VDD pin of the PSE chip is respectively connected with the first power supply end of the direct current voltage stabilizing power supply, the first end of the eleventh resistor and the first end of the seventeenth resistor, the second end of the seventeenth resistor is grounded, the RESET pin of the PSE chip is respectively connected with the second end of the eleventh resistor and the first end of the key switch, the second end of the key switch is grounded, the VPWR pin of the PSE chip is respectively connected with the power supply end of the PD circuit and the eighteenth resistor, the TXOP2 pin is respectively connected with the second end of the PSE resistor, the ninth resistor is connected with the ninth end of the PSE resistor, the nineteenth resistor is respectively connected with the second end of the PSE resistor, the nineteenth resistor is connected with the ninth resistor, the nineteenth resistor is respectively, the second end of the PSE resistor is connected with the nineteenth resistor is connected with the second end of the PSE resistor, the second end of the thirteenth resistor is respectively connected with the source electrode of the second power transistor, the first ends of the fourteenth resistor and the fifteenth resistor, the second ends of the fourteenth resistor and the fifteenth resistor are connected and then grounded, the second power input pin of the third network transformer is connected with the power supply end of the PD circuit, and the SHTDWN pin of the PSE chip is connected with the first power supply end of the direct-current stabilized power supply.
6. The apparatus of claim 5, wherein the PD circuit, PSE circuit, dc voltage regulator circuit, and switch are disposed on a same circuit board.
7. The apparatus of any of claims 1-6, further comprising a PoE switch, the PoE switch being in circuit connection with the PD.
8. A camera device comprising a camera and a networking power supply according to any one of claims 1-7.
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| CN201810213176.3A CN109257533B (en) | 2018-03-15 | 2018-03-15 | Networking power supply device for camera and camera equipment |
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| CN201810213176.3A CN109257533B (en) | 2018-03-15 | 2018-03-15 | Networking power supply device for camera and camera equipment |
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| CN109257533A CN109257533A (en) | 2019-01-22 |
| CN109257533B true CN109257533B (en) | 2024-03-26 |
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| CN112929727B (en) * | 2021-03-09 | 2022-10-14 | 广州长鹏光电科技有限公司 | Terminal equipment of experiment examination system |
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