CN107370364A - POE power supply circuits - Google Patents
POE power supply circuits Download PDFInfo
- Publication number
- CN107370364A CN107370364A CN201710624997.1A CN201710624997A CN107370364A CN 107370364 A CN107370364 A CN 107370364A CN 201710624997 A CN201710624997 A CN 201710624997A CN 107370364 A CN107370364 A CN 107370364A
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- CN
- China
- Prior art keywords
- chips
- power supply
- max5969
- pins
- pse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a kind of POE power supply circuits, including PD detections circuit, DC D/C powers translation circuit and PSE bypass circuits, wherein, the output end of the PD detections circuit is connected with the DC D/C powers translation circuit, PSE bypass circuits respectively.The beneficial effects of the invention are as follows：Remove booster circuit, simplify circuit, reduce cost.
Description
Technical field
The present invention relates to power supply circuit, more particularly to a kind of POE power supply circuits.
Background technology
At present, the product major defect that there are PSE power applications at PD ends has booster circuit at PD ends, answers PD circuitries
It is miscellaneous, easily there is fault, furthermore complete machine cost is high.
The content of the invention
In order to solve the problems of the prior art, the invention provides a kind of POE power supply circuits.
The invention provides a kind of POE power supply circuits, including PD detections circuit, DC-DC power source translation circuit and PSE
Bypass circuits, wherein, the output end of PD detection circuit respectively with the DC-DC power source translation circuit, PSE bypass
Circuit connects.
As a further improvement on the present invention, the PD detections circuit includes MAX5969 chip U507, PD detection resistances
R257, graded resistance R258, clamper protection diode D29, wherein, the input of the clamper protection diode D29 passes through magnetic
Pearl L6 is connected with the VSS pins of the MAX5969 chips U507, and the output end of the clamper protection diode D29 passes through magnetic bead
L3 is connected with the VDD pins of the MAX5969 chips U507, and DET pins and the PD of the MAX5969 chips U507 are detected
Resistance R257 one end connection, the other end of the PD detection resistances R257 are connected to magnetic bead L3, MAX5969 chip U507
VDD pins between, the CLS pins of the MAX5969 chips U507 are connected with one end of the graded resistance R258, described point
The level resistance R258 other end is connected between the VSS pins of magnetic bead L6, MAX5969 chip U507, and power supply unit is through institute
Respectively DC-DC power source translation circuit and PSE bypass circuits provides voltage after stating MAX5969 chips U507 detections, classification.
As a further improvement on the present invention, the DC-DC power source translation circuit includes MAX17505 chips U509.
As a further improvement on the present invention, VIN1 pins, VIN2 pins, the VIN3 of the MAX17505 chips U509 draws
VDD pin of the pin respectively with the MAX5969 chips U507 is connected.
As a further improvement on the present invention, the VCC pin of the MAX17505 chips U509 is connected with electric capacity C210, institute
State electric capacity C210 other end ground connection.
As a further improvement on the present invention, the RT pins of the MAX17505 chips U509 are connected with resistance R265, institute
State resistance R265 other end ground connection.
As a further improvement on the present invention, the PSE bypass circuits include MAX5971 chips U17.
As a further improvement on the present invention, the PSE bypass circuits also include diode D24, the diode
D24 input end grounding, output end are connected to voltage input end.
As a further improvement on the present invention, the PSE bypass circuits also include electric capacity C732, the electric capacity C732
One end ground connection, add one end to be connected to voltage input end.
The beneficial effects of the invention are as follows：By such scheme, remove booster circuit, simplify circuit, reduce cost.
Brief description of the drawings
Fig. 1 is a kind of the general frame of POE power supply circuits of the present invention.
Fig. 2 is a kind of circuit diagram of the PD detection circuits of POE power supply circuits of the present invention.
Fig. 3 is a kind of circuit diagram of the DC-DC power source translation circuit of POE power supply circuits of the present invention.
Fig. 4 is a kind of circuit diagram of the PSE bypass circuits of POE power supply circuits of the present invention.
Embodiment
The invention will be further described for explanation and embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of POE power supply circuits, including PD detections circuit 1, DC-DC power source translation circuit 2 and PSE
Bypass circuits 3, wherein, the output end of PD detection circuit 1 respectively with the DC-DC power source translation circuit 2, PSE
Bypass circuits 3 connect.
As shown in Fig. 2 the PD detections circuit 1 includes MAX5969 chip U507, PD detection resistances R257, graded resistance
R258, clamper protection diode D29, wherein, the input of the clamper protection diode D29 by magnetic bead L6 with it is described
MAX5969 chips U507 VSS pins connection, the output end of the clamper protection diode D29 by magnetic bead L3 with it is described
MAX5969 chips U507 VDD pins connection, the DET pins of the MAX5969 chips U507 and the PD detection resistances R257
One end connection, the VDD that the other end of the PD detection resistances R257 is connected to magnetic bead L3, MAX5969 chip U507 draws
Between pin, the CLS pins of the MAX5969 chips U507 are connected with one end of the graded resistance R258, the graded resistance
The R258 other end is connected between the VSS pins of magnetic bead L6, MAX5969 chip U507, described in power supply unit warp
It is respectively that DC-DC power source translation circuit and PSE bypass circuits provide voltage after MAX5969 chips U507 detections, classification.
As shown in figure 3, the DC-DC power source translation circuit 2 includes MAX17505 chips U509.
As shown in figure 3, the VIN1 pins of the MAX17505 chips U509, VIN2 pins, VIN3 pins respectively with it is described
MAX5969 chips U507 VDD pins connection.
As shown in figure 3, the VCC pin of the MAX17505 chips U509 is connected with electric capacity C210, the electric capacity C210's
The other end is grounded.
As shown in figure 3, the RT pins of the MAX17505 chips U509 are connected with resistance R265, the resistance R265's is another
One end is grounded.
As shown in figure 4, the PSE bypass circuits 3 include MAX5971 chips U17.
As shown in figure 4, the PSE bypass circuits 3 also input including diode D24, the diode D24 terminates
Ground, output end are connected to voltage input end.
As shown in figure 4, the PSE bypass circuits 3 also one end including electric capacity C732, the electric capacity C732 is grounded, add
One end is connected to voltage input end.
A kind of operation principle of POE power supply circuits provided by the invention is：
1st, PD detects circuit 1, and PSE is connected to CT1, CT2 or CT5 through RJ45, network transformer centre cap, CT6 is inputted, warp
48V voltage is provided after MAX5969 chips U507 detections, classification for PD systems and PSE BY-PASS.Wherein R257 detects for PD
Resistance, R258 are PD graded resistances, and D29 is clamper protection diode.This partial circuit can use commercial PD detection chips
Or the PD detection circuit realirations of separation.
2nd, DC-DC power source translation circuit 2, the 48V voltages exported from AX5969 chips U507 are through MAX17505 chips U509
3.3V or 5V direct current outputs are transformed to, suitable power supply is provided for the master chip of PD equipment.This partial circuit can select commercialization
Input voltage be higher than 65V DC-DC chips.
3rd, PSE bypass circuits 3, the 48V voltages another way exported from MAX5969 chips U507 give MAX5971 chips
U17 powers, to realize PoE by-pass functions.This partial circuit can select commercial PSE chips to complete.by-pass PoE
The power supply of chip must be inputted by MAX5969 chips U507 output, otherwise can be influenceed the power supply of whole PD equipment, be made PD equipment
It is unable to normal use.
A kind of POE power supply circuits provided by the invention, remove booster circuit, simplify circuit, reduce cost.
A kind of POE power supply circuits provided by the invention, be related to PoE power supply PD ends and PSE ends, compatible IEEE802.3af,
IEEE802.3at standard, it is mainly used in the product that PD ends need standard PSE to power, simplifies wiring.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (9)
- A kind of 1. POE power supply circuits, it is characterised in that：Including PD detections circuit, DC-DC power source translation circuit and PSE bypass Circuit, wherein, the output end of the PD detections circuit connects with the DC-DC power source translation circuit, PSE bypass circuits respectively Connect.
- 2. POE power supply circuits according to claim 1, it is characterised in that：The PD detections circuit includes MAX5969 chips U507, PD detection resistance R257, graded resistance R258, clamper protection diode D29, wherein, the clamper protection diode D29 Input be connected by magnetic bead L6 with the VSS pins of the MAX5969 chips U507, the clamper protection diode D29's Output end is connected by magnetic bead L3 with the VDD pins of the MAX5969 chips U507, and the DET of the MAX5969 chips U507 draws Pin is connected with one end of the PD detection resistances R257, the other end of the PD detection resistances R257 be connected to the magnetic bead L3, Between MAX5969 chips U507 VDD pins, the CLS pins of the MAX5969 chips U507 are with the graded resistance R258's One end connects, the other end of the graded resistance R258 be connected to magnetic bead L6, MAX5969 chip U507 VSS pins it Between, power supply unit is respectively DC-DC power source translation circuit and PSE after the MAX5969 chips U507 is detected, is classified Bypass circuits provide voltage.
- 3. POE power supply circuits according to claim 2, it is characterised in that：The DC-DC power source translation circuit includes MAX17505 chips U509.
- 4. POE power supply circuits according to claim 3, it is characterised in that：The VIN1 of the MAX17505 chips U509 draws The VDD pins of pin, VIN2 pins, VIN3 pins respectively with the MAX5969 chips U507 are connected.
- 5. POE power supply circuits according to claim 3, it is characterised in that：The VCC pin of the MAX17505 chips U509 It is connected with electric capacity C210, the electric capacity C210 other end ground connection.
- 6. POE power supply circuits according to claim 3, it is characterised in that：The RT pins of the MAX17505 chips U509 It is connected with resistance R265, the resistance R265 other end ground connection.
- 7. POE power supply circuits according to claim 2, it is characterised in that：The PSE bypass circuits include MAX5971 Chip U17.
- 8. POE power supply circuits according to claim 2, it is characterised in that：The PSE bypass circuits also include two poles Pipe D24, the input end grounding of the diode D24, output end are connected to voltage input end.
- 9. POE power supply circuits according to claim 2, it is characterised in that：The PSE bypass circuits also include electric capacity C732, the electric capacity C732 one end ground connection, add one end to be connected to voltage input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624997.1A CN107370364A (en) | 2017-07-27 | 2017-07-27 | POE power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624997.1A CN107370364A (en) | 2017-07-27 | 2017-07-27 | POE power supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107370364A true CN107370364A (en) | 2017-11-21 |
Family
ID=60307809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710624997.1A Pending CN107370364A (en) | 2017-07-27 | 2017-07-27 | POE power supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107370364A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202150863U (en) * | 2011-07-15 | 2012-02-22 | 上海理工大学 | POE power supply apparatus having automatic voltage detection function |
| CN102497276A (en) * | 2011-12-20 | 2012-06-13 | 青岛海信网络科技股份有限公司 | Power source conversion circuit and network camera with same |
| CN104869003A (en) * | 2014-02-25 | 2015-08-26 | 华为技术有限公司 | Power supply device and method |
| CN205490598U (en) * | 2016-01-06 | 2016-08-17 | 四川智邦***集成有限公司 | Intellectual detection system POE power supply |
| US20160323115A1 (en) * | 2013-12-27 | 2016-11-03 | Zte Corporation | Power Supply Protection System and Method for POE |
| CN205864444U (en) * | 2016-07-22 | 2017-01-04 | 深圳市网联天下科技有限公司 | The POE detection output circuit of a kind of WIFI equipment and WIFI equipment |
| CN205883290U (en) * | 2016-07-22 | 2017-01-11 | 北京安拓伟业科技发展有限公司 | Switch circuit structure and high -power POE switch |
-
2017
- 2017-07-27 CN CN201710624997.1A patent/CN107370364A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202150863U (en) * | 2011-07-15 | 2012-02-22 | 上海理工大学 | POE power supply apparatus having automatic voltage detection function |
| CN102497276A (en) * | 2011-12-20 | 2012-06-13 | 青岛海信网络科技股份有限公司 | Power source conversion circuit and network camera with same |
| US20160323115A1 (en) * | 2013-12-27 | 2016-11-03 | Zte Corporation | Power Supply Protection System and Method for POE |
| CN104869003A (en) * | 2014-02-25 | 2015-08-26 | 华为技术有限公司 | Power supply device and method |
| CN205490598U (en) * | 2016-01-06 | 2016-08-17 | 四川智邦***集成有限公司 | Intellectual detection system POE power supply |
| CN205864444U (en) * | 2016-07-22 | 2017-01-04 | 深圳市网联天下科技有限公司 | The POE detection output circuit of a kind of WIFI equipment and WIFI equipment |
| CN205883290U (en) * | 2016-07-22 | 2017-01-11 | 北京安拓伟业科技发展有限公司 | Switch circuit structure and high -power POE switch |
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