CN102801536A - Network communication equipment - Google Patents
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- CN102801536A CN102801536A CN2011101416453A CN201110141645A CN102801536A CN 102801536 A CN102801536 A CN 102801536A CN 2011101416453 A CN2011101416453 A CN 2011101416453A CN 201110141645 A CN201110141645 A CN 201110141645A CN 102801536 A CN102801536 A CN 102801536A
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Abstract
The invention discloses network communication equipment, which is used for generating a dying gasp signal. The network communication equipment comprises a voltage sensing circuit, a charging and discharging circuit, a power supply circuit, a central processing unit, a subsystem circuit, an overheat sensing circuit and an overheat protection circuit, wherein the voltage sensing circuit senses the voltage of an external power supply; the central processing unit comprises a dying gasp sensing pin, and is connected with the voltage sensing circuit to obtain the sensed voltage, judge whether the external power supply is cut off or not according to the sensed voltage and generate the dying gasp signal when the external power supply is cut off; the overheat sensing circuit senses whether the network communication equipment is overheated or not; and the overheat protection circuit switches off the subsystem circuit and the power supply circuit when the network communication equipment is overheated, and enables the central processing unit to generate the dying gasp signal. According to the network communication equipment, the dying gasp signal can be generated under a dying gasp condition and an overheat condition without interference.
Description
Technical field
The present invention relates to network service, particularly a kind of network equipment that produces power-off signal.
Background technology
Producing power-off signal (dying gasp) is the basic demand of digital user loop (XDSL) equipment; This action makes the local side manager can know that the terminal use is oneself outage shutdown or causes broken string because of the line quality problem, to make things convenient for the local side manager line inspection and customer service.In recent years, because of the requirement of terminal use to miniaturization of electronic products, the shell of digital user loop equipment is done littler and littler.Simultaneously, because the terminal use usually can not pull out the power supply of digital user loop equipment, make digital user loop equipment overheated easily under long-time the use, severe patient causes the digital user loop device housings to melt distortion.Thereby, in digital user loop equipment, add overheat protective function usually.Yet present overheat protective function is common and produce the power-off signal onrelevant, and this causes local side manager erroneous judgement.
Summary of the invention
In view of this, a kind of network communication equipment need be provided, under outage and overheat condition, all can produce power-off signal.
A kind of network communication equipment is used to produce power-off signal and is sent to local side apparatus, comprises voltage detection circuit, charge-discharge circuit, power supply circuits, central processing unit, subsystem circuit, overheated circuit for detecting and overheating protection circuit.Voltage detection circuit connects external power source, is used to detect the voltage of said external power source.Charge-discharge circuit connects said external power source, is used for charging when said external power source is worked, and discharge when said external power source breaks off.Power supply circuits connect said charge-discharge circuit, are used for converting input voltage into a plurality of output voltages, are said network communication equipment power supply.Central processing unit connects said voltage detection circuit and said power supply circuits, comprises outage detecting pin, and said outage detecting pin connects said voltage detection circuit to obtain said detecting voltage.Said central processing unit is used to control the work of said network communication equipment, and judges according to said detecting voltage whether said external power source breaks off, and when said external power source breaks off, produces power-off signal.Subsystem circuit connects said central processing unit and said power supply circuits, is used for carrying out work according to the control of said central processing unit.Whether overheated circuit for detecting is used to detect said network communication equipment overheated.Overheating protection circuit connects the outage detecting pin of said overheated circuit for detecting and central processing unit, is used for when said network communication equipment is overheated, turn-offing said subsystem circuit and said power supply circuits, and makes said central processing unit produce power-off signal.Said overheating protection circuit comprises first switch element, second switch element and first electric capacity.First switch element comprises the control utmost point, first electrode and second electrode, and said first electrode connects said outage detecting pin, and said second electrode is via first grounding through resistance, and the said control utmost point connects said overheated circuit for detecting via second resistance.The second switch element comprises the control utmost point, first electrode and second electrode; The control utmost point of said second switch element connects the control utmost point of said first switch element and connects said subsystem circuit via said second resistance; First electrode of said second switch element receives first voltage, and second electrode of said second switch element is via the 3rd grounding through resistance and connect said power supply circuits.First electric capacity is parallelly connected with said the 3rd resistance.
Preferably, said overheating protection circuit also comprises the 4th resistance, is connected between the control utmost point and ground of said first switch element.
Preferably, said first voltage is said one of output voltage that waits of said power supply circuits.
Preferably, said voltage detection circuit comprises the 5th resistance, the 6th resistance, the 7th resistance and the 8th resistance.Said the 5th resistance and said the 6th resistance string are coupled between said external power source and the ground.Said the 7th resistance and said the 8th resistance string are coupled between the tie point and ground of said the 5th resistance and said the 6th resistance, and said the 7th resistance is connected the outage detecting pin of said central processing unit with the tie point of said the 8th resistance.
Preferably, said charge-discharge circuit comprises thermistor, diode and at least one second electric capacity.Thermistor one end connects said external power source.The anode of diode connects the other end of said thermistor, and negative electrode connects said power supply circuits.At least one second electric capacity is connected between the negative electrode and ground of said diode.
Preferably, said power supply circuits comprise pressurizer and a plurality of power transfer module.Said pressurizer comprises input and output, and said input connects said charge-discharge circuit, and said output is exported first output voltage, is said overheated circuit for detecting and the power supply of said overheating protection circuit.Power transfer module such as said comprises first input end, second input and output; The first input end of power transfer module such as said connects said charge-discharge circuit; Second input of power transfer module such as said connects second electrode of the second switch element of said overheating protection circuit; The output of power transfer module such as said is exported a plurality of second output voltages, is the power supply of said central processing unit and said subsystem circuit.
Preferably, said subsystem circuit comprise first with the door and subsystem element.First comprises first input end, second input and output with door, and said first is connected said central processing unit with the first input end of door, said first with second input be connected the control utmost point of the second switch element of said overheating protection circuit.Subsystem element connects one of power transfer module such as said, by power supply such as one of said second output voltage such as grade, and connect said first with the output of door.
Preferably, said subsystem circuit also comprise second with the door and the USB power subsystem.Second comprises first input end, second input and output with door, and said second is connected said voltage detection circuit with the first input end of door, said second with second input be connected the control utmost point of the second switch element of said overheating protection circuit.The USB power subsystem connect said second with the output of door, be used for according to said second with the control of door, be the power supply of external USB client.
A kind of network communication equipment is used to produce power-off signal and is sent to local side apparatus, comprises voltage detection circuit, charge-discharge circuit, power supply circuits, central processing unit, subsystem circuit, overheated circuit for detecting and overheating protection circuit.Voltage detection circuit connects external power source, is used to detect the voltage of said external power source.
Charge-discharge circuit connects said external power source, is used for charging when said external power source is worked, and discharge when said external power source breaks off.Power supply circuits connect said charge-discharge circuit, are used for converting said external power source into a plurality of output voltages, are said network communication equipment power supply.Central processing unit connects said voltage detection circuit and said power supply circuits; Comprise outage detecting pin; Said outage detecting pin connects said voltage detection circuit to obtain said detecting voltage; Said central processing unit is used for judging according to said detecting voltage whether said external power source breaks off, and when said external power source breaks off, produces power-off signal.Subsystem circuit connects said central processing unit and said power supply circuits, is used for carrying out work according to the control of said central processing unit.Whether overheated circuit for detecting is used to detect said network communication equipment overheated.Overheating protection circuit connects the outage detecting pin of said overheated circuit for detecting and central processing unit; Be used for when said network communication equipment is overheated; Change the voltage of said outage detecting pin; So that said central processing unit produces power-off signal, and turn-off said subsystem circuit and said power supply circuits.
Preferably, said overheating protection circuit comprises first switch element, second switch element and first electric capacity.First switch element comprises the control utmost point, first electrode and second electrode, and said first electrode connects said outage detecting pin, and said second electrode is via first grounding through resistance, and the said control utmost point connects said overheated circuit for detecting via second resistance.The second switch element comprises the control utmost point, first electrode and second electrode; The control utmost point of said second switch element connects the control utmost point of said first switch element and connects said subsystem circuit via said second resistance; First electrode of said second switch element receives first voltage, and second electrode of said second switch element is via the 3rd grounding through resistance and connect said power supply circuits.First electric capacity is parallelly connected with said the 3rd resistance.
The detecting of will cutting off the power supply of above-mentioned network communication equipment combines with overtemperature protection, cut off the power supply and overheat condition under all can produce power-off signal and can not interfere with each other.
Description of drawings
Fig. 1 is the sketch map of network communication equipment in an embodiment of the present invention;
Fig. 2 is the circuit diagram of the overheating protection circuit of network communication equipment in the first embodiment of the invention;
Fig. 3 is the circuit diagram of the overheating protection circuit of network communication equipment in the second embodiment of the invention;
Fig. 4 is the physical circuit figure of network communication equipment in an embodiment of the present invention; And
Fig. 5 is the physical circuit figure of network communication equipment in another execution mode of the present invention.
The main element symbol description
Charge-discharge circuit 110
Subsystem circuit 140,140A, 140B
First with the door G1
Second with the door G2
Overheated circuit for detecting 150
Overheating protection circuit 160,160A, 160B
The first switch element Q1
Second switch element Q2
First to fourth capacitor C 1, C2, C3, C4
First to the 8th resistance R 1～R8
Thermistor NTC
Diode D1
The first voltage V
First output voltage V 1
Second output voltage V 2
External power source Vin
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
Fig. 1 is the sketch map of network communication equipment 10 in an embodiment of the present invention.In this execution mode, network communication equipment 10 is a digital user loop equipment, is used to produce power-off signal and is sent to local side apparatus.Network communication equipment 10 comprises voltage detection circuit 100, charge-discharge circuit 110, power supply circuits 120, central processing unit 130, subsystem circuit 140, overheated circuit for detecting 150 and overheating protection circuit 160.Voltage detection circuit 100 connects external power source Vin, is used to detect the voltage of external power source Vin.Charge-discharge circuit 110 connects external power source Vin, and charging when being used for externally power supply Vin work reaches discharge when externally power supply Vin breaks off.
Whether overheated circuit for detecting 150 is used to detect network communication equipment 10 overheated.Overheated circuit for detecting 150 is supplied power by the first voltage V, to keep continued power.In this execution mode, the first voltage V is power supply independently.In another embodiment of the present invention, the first voltage V also can be provided by power supply circuits 120.Overheated circuit for detecting 150 realizes that by temperature-sensitive element it exports signal to the overheating protection circuit 160 of different voltages under condition of different temperatures.
In this execution mode, when network communication equipment 10 operate as normal, charge-discharge circuit 110 chargings, the detecting voltage that voltage detection circuit 100 obtains is high level signal.Thereby central processing unit 130 is judged external power source Vin normal power supply according to the detecting voltage of high level, can not produce power-off signal.If this moment, network communication equipment 10 was overheated, it is overheated that overheated circuit for detecting 150 detects, and then notifies overheating protection circuit 160.Overheating protection circuit 160 changes the voltage of the outage detecting pin of central processing unit 130, promptly drags down the voltage of outage detecting pin, makes central processing unit 130 think that external power source Vin cuts off the power supply, thereby produces power-off signal, the notice local side apparatus.Simultaneously; Overheating protection circuit 160 slowly turn-offs power supply circuits 120; Make power supply circuits 120 provide central processing unit 130 to produce the required necessary electric power of power-off signal; And turn-off subsystem circuit 140 immediately, saving the electricity consumption of network communication equipment 10, and avoid that subsystem circuit 140 and power supply circuits 120 continuous firings bring persistently overheating.
When external power source Vin cut off the power supply, the detecting voltage that voltage detection circuit 100 detects was about 0, and central processing unit 130 is judged external power source Vin outage according to said detecting voltage.At this moment, charge-discharge circuit 110 for power supply circuits 120 provide input voltage, makes it that necessary output voltage to central processing unit 130 is provided to power supply circuits 120 discharges, makes central processing unit 130 have enough electric power to produce power-off signal.
Shown in Figure 2 is the physical circuit figure of overheating protection circuit 160A in an embodiment of the present invention.Overheating protection circuit 160A comprises the first switch element Q1, first resistance R 1, second resistance R 2, second switch element Q2, the 3rd resistance R 3 and first capacitor C 1.The first switch element Q1 and second switch element Q2 include the control utmost point, first electrode and second electrode.First electrode of the first switch element Q1 connects the outage detecting pin of central processing unit 130, and second electrode is via first resistance R, 1 ground connection, and the control utmost point connects overheated circuit for detecting 150 via second resistance R 2.The control utmost point of second switch element Q2 receives the first voltage V via the control utmost point and connector circuit system 140, the first electrodes that second resistance R 2 connects the first switch element Q1, and second electrode is via the 3rd resistance R 3 ground connection and connect power supply circuits 120.First capacitor C 1 is parallelly connected with the 3rd resistance R 3.
In this execution mode; The first switch element Q1 is P-type mos FET (PMOSFET); The control of the first switch element Q1 is the grid of PMOSFET very; First electrode of the first switch element Q1 is the source electrode of PMOSFET, and second electrode of the first switch element Q1 is the drain electrode of PMOSFET.Second switch element Q2 is the transistor of NPN type; The control of second switch element Q2 is the base stage of NPN transistor very; First electrode of second switch element Q2 is the collector electrode of NPN transistor, and second electrode of second switch element Q2 is the emitter of NPN transistor.First resistance R 1 is 20Kohm, and the 3rd resistance R 3 is 47Kohm.
When network communication equipment 10 operate as normal, overheating conditions does not take place in the signalisation overheating protection circuit 160A network communication equipment 10 that overheated circuit for detecting 150 produces high level.At this moment; The first switch element Q1 ends; Has high-impedance behavior when ending because of the first switch element Q1; Avoid influencing the dividing potential drop of the outage detecting pin of central processing unit 130, thereby overheating protection circuit 160A can not change the voltage of the outage detecting pin of central processing unit 130, central processing unit 130 can not produce power-off signal.Second switch element Q2 conducting; Thereby second electrode of second switch element Q2 is a high level; 1 charging of first capacitor C, and enable signal to the power supply circuits 120 and the subsystem circuit 140 of overheating protection circuit 160A transmission high level make power supply circuits 120 and subsystem circuit 140 equal operate as normal.
When network communication equipment 10 was overheated, it is overheated that overheated circuit for detecting 150 detects, and produces low level signalisation overheating protection circuit 160A.At this moment, the first switch element Q1 conducting, the outage detecting pin dividing potential drop of 1 pair of central processing unit 130 of first resistance R, thus drag down the voltage that pin is detected in outage, make central processing unit 130 produce power-off signals.Simultaneously, overheating protection circuit 160A sends low level enable signal to subsystem circuit 140, and to reduce the power consumption of network communication equipment 10, it is overheated to avoid temperature to continue.Second switch element Q2 ends; This moment, first capacitor C 1 was to 3 discharges of the 3rd resistance R; Be that overheating protection circuit 160A sends enable signal to the power supply circuits 120 that voltage slowly descends; Make power supply circuits 120 that necessary electric power to central processing unit 130 is provided earlier,, and then turn-off with the generation power-off signal.
Fig. 3 is the physical circuit figure of overheating protection circuit 160B in another execution mode of the present invention.The different overheating protection circuit 160B that are of overheating protection circuit 160A among overheating protection circuit 160B in this execution mode and Fig. 2 also comprise the 4th resistance R 4, and remainder is identical, thereby no longer detail here.The 4th resistance R 4 is connected between the control utmost point and ground of the first switch element Q1, forms bleeder circuits with second resistance R 2, with the voltage of the control utmost point of finely tuning the first switch element Q1.
Fig. 4 is the physical circuit figure of network communication equipment 10 in an embodiment of the present invention, particularly voltage detection circuit 100, charge-discharge circuit 110, power supply circuits 120 and subsystem circuit 140A.Voltage detection circuit 100 comprises the 5th resistance R 5 to the 9th resistance R 9.The 5th resistance R 5 and the 6th resistance R 6 are series between external power source Vin and the ground.The 7th resistance R 7 and the 8th resistance R 8 are series between the tie point and ground of the 5th resistance R 5 and the 6th resistance R 5, and the 7th resistance R 7 is connected the outage detecting pin of central processing unit 130 with the tie point of the 8th resistance R 8.In this execution mode, the voltage of external power source Vin is 12V, and the 5th resistance R 5 is 47Kohm, and the 6th resistance R 6 is 39Kohm, and the 7th resistance R 7 is 24Kohm, and the 8th resistance R 8 is 20Kohm.Thereby during external power source Vin normal power supply, the voltage of the outage of central processing unit 130 detecting pin is about 1.67V, and the voltage of the tie point of the 5th resistance R 5 and the 6th resistance R 6 is about 3.67V.In this execution mode, central processing unit 130 can produce power-off signal in outage detecting pin voltage below 1.25V (fluctuating 2.5%).
Charge-discharge circuit 110 comprises thermistor NTC, diode D1 and at least one second electric capacity.The quantity of at least one second electric capacity is set according to the need for electricity of network communication equipment 10; In this execution mode; It comprises second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 that appearance value parallel with one another is less, avoids the use of big electric capacity, thereby reduces the thickness of network communication equipment 10.Thermistor NTC is connected between the anode of external power source Vin and diode D1, the instantaneous large-current when being used to prevent external power source Vin unlatching.The negative electrode of the first diode D1 connects power supply circuits 120, and via second capacitor C 2 parallel with one another, the 3rd capacitor C 3 and the 4th capacitor C 4 ground connection.In this execution mode, thermistor NTC is a negative tempperature coefficient thermistor.
When external power source Vin normal power supply, diode D1 conducting, second capacitor C 2, the 3rd capacitor C 3 and 4 chargings of the 4th capacitor C, external power source Vin is that power supply circuits 120 provide input voltage via thermistor NTC and diode D1.When external power source Vin cut off the power supply, second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 were to power supply circuits 120 discharges, and at this moment, diode D1 ends, and prevented that discharging current from refluxing, to avoid the electric weight waste.
Fig. 5 is the physical circuit figure of network communication equipment 10 in another execution mode of the present invention; Among itself and Fig. 4 the difference of network communication equipment 10 be subsystem circuit 140B also comprise second with door G2 and USB power subsystem 1410; All the other are identical, thereby repeat no more.Second with the door G2 comprise first input end, second input and output; Second is connected the 5th resistance R 5 of voltage detection circuit 100 and the tie point of the 6th resistance R 5 with the first input end of door G2, and second is connected the control utmost point of the second switch element Q2 of overheating protection circuit 160 with second input of G2.USB power subsystem 1410 connect second with the output of door G2, and by the power supply of one of power transfer module 1210, be used for according to second with the control of door G2, be the power supply of external USB client.In this execution mode; When the tie point voltage of the 5th resistance R 5 and the 6th resistance R 6 and enable signal that overheating protection circuit 160,160A, 160B send out were high level, second just saw control signal control USB power subsystem 1410 work of high level off with door G2.When any is for low level in the tie point voltage of the 5th resistance R 5 and the 6th resistance R 6 and the enable signal that overheating protection circuit 160,160A, 160B send out; Second with the door G2 see low level control signal off; Control USB power subsystem 1410 is not worked, thereby stops to be the power supply of external USB client.
In this execution mode; When external power source Vin operate as normal; External power source Vin is second capacitor C 2, the 3rd capacitor C 3 and 4 chargings of the 4th capacitor C via thermistor NTC and diode D1; And input voltage is provided for pressurizer 1200 and power transfer module 1210; Thereby pressurizer 1200 output first output voltage V 1 to overheated circuit for detecting 150 and overheating protection circuit 160,160A, 160B, a plurality of second output voltage V 2 to the central processing units 130 of power transfer module 1210 outputs, subsystem element 1400 and USB power subsystem 1410.This moment, the outage detecting pin voltage of central processing unit 130 was about 1.67V, and central processing unit 130 can not produce power-off signal.The voltage of the 5th resistance R 5 and the 6th resistance R 6 tie points is about 3.67V, is high level signal.At this moment; Network communication equipment 10 is not overheated, thereby produces high level signal, for example; 3.3V high level signal notice overheating protection circuit 160,160A, 160B; The first switch element Q1 ends, second switch element Q2 conducting, overheating protection circuit 160,160A, 160B see off high level enable signal to power transfer module 1210, first and door G1 and second with a G2.At this moment, first is high level signal with door G1 and second with the input of G2, thereby all exports high level signal, and subsystem element 1400 and USB supply voltage 1410 are all worked.
If it is overheated that network communication equipment 10 takes place, external power source Vin this moment continued power still, thereby the outage of central processing unit 130 detecting pin voltage still be 1.67V, second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 still continue to charge.It is overheated that overheated circuit for detecting 150 detects, and produces low level signal notice overheating protection circuit 160,160A, 160B, and promptly the control utmost point of the first switch element Q1 and second switch element Q2 is low level.Thereby, the first switch element Q1 conducting, second switch element Q2 ends.First resistance R 1 is parallelly connected with the 8th resistance R 8, outage detecting pin voltage is dragged down be 0.98V, thereby central processing unit 130 begins to produce power-off signal.Overheating protection circuit 160,160A, 160B send low level enable signal to the first and door G1 and second with G2; Thereby subsystem element 1400 and USB power subsystem 1410 are closed; Reducing power consumption, and avoid that subsystem element 1400 and USB power subsystem 1410 work on and brought persistently overheating.Simultaneously; First capacitor C 1 is to 3 discharges of the 3rd resistance R; Be enable signal to the power transfer module 1210 that overheating protection circuit 160,160A, 160B provide voltage slowly to descend, power transfer module 1210 is turn-offed after providing central processing unit 130 to produce the required electric power of power-off signals.And pressurizer 1200 this moment continuous firing is still given overheated circuit for detecting 150 and overheating protection circuit 160,160A, 160B with continued power.In this execution mode, the voltage when first capacitor C 1 has just begun to discharge is 4.8V, and when it was discharged to voltage and is about 0.8V, power transfer module 1210 was turn-offed, and this discharge process is kept about 107ms.
If external power source Vin outage, second capacitor C 2, the 3rd capacitor C 3 and 4 discharges of the 4th capacitor C, diode D1 ends, and prevents that discharging current from refluxing.Thereby outage detecting pin voltage becomes 0 immediately, has reduced the detecting time of central processing unit 130, and central processing unit 130 begins to produce power-off signal.Power transfer module 1210 is utilized the input voltage of second capacitor C 2, the 3rd capacitor C 3 and 4 discharges of the 4th capacitor C, continues as central processing unit 130 power supplies, makes it produce power-off signal.
Claims (10)
1. a network communication equipment is used to produce power-off signal and is sent to local side apparatus, it is characterized in that said network communication equipment comprises:
Voltage detection circuit connects external power source, is used to detect the voltage of said external power source;
Charge-discharge circuit connects said external power source, is used for charging when said external power source is worked, and discharge when said external power source breaks off;
Power supply circuits connect said charge-discharge circuit, are used for converting input voltage into a plurality of output voltages, are said network communication equipment power supply;
Central processing unit; Connect said voltage detection circuit and said power supply circuits; Comprise outage detecting pin, said outage detecting pin connects said voltage detection circuit to obtain said detecting voltage, and said central processing unit is used to control the work of said network communication equipment; And judge according to said detecting voltage whether said external power source breaks off, and, said external power source produces power-off signal when breaking off;
Subsystem circuit connects said central processing unit and said power supply circuits, is used for carrying out work according to the control of said central processing unit;
Overheated circuit for detecting, whether be used to detect said network communication equipment overheated; And
Overheating protection circuit, pin is detected in the outage that connects said overheated circuit for detecting and central processing unit, is used for when said network communication equipment is overheated, turn-offing said subsystem circuit and said power supply circuits, and makes said central processing unit produce power-off signal, comprising:
First switch element comprises the control utmost point, first electrode and second electrode, and said first electrode connects said outage detecting pin, and said second electrode is via first grounding through resistance, and the said control utmost point connects said overheated circuit for detecting via second resistance;
The second switch element; Comprise the control utmost point, first electrode and second electrode; The control utmost point of said second switch element connects the control utmost point of said first switch element and connects said subsystem circuit via said second resistance; First electrode of said second switch element receives first voltage, and second electrode of said second switch element is via the 3rd grounding through resistance and connect said power supply circuits; And
First electric capacity, parallelly connected with said the 3rd resistance.
2. network communication equipment as claimed in claim 1 is characterized in that said overheating protection circuit also comprises the 4th resistance, is connected between the control utmost point and ground of said first switch element.
3. network communication equipment as claimed in claim 1 is characterized in that, one of said output voltage that said first voltage is said power supply circuits.
4. network communication equipment as claimed in claim 1 is characterized in that, said voltage detection circuit comprises:
The 5th resistance;
The 6th resistance, said the 5th resistance and said the 6th resistance string are coupled between said external power source and the ground;
The 7th resistance; And
The 8th resistance, said the 7th resistance and said the 8th resistance string are coupled between the tie point and ground of said the 5th resistance and said the 6th resistance, and said the 7th resistance is connected the outage detecting pin of said central processing unit with the tie point of said the 8th resistance.
5. network communication equipment as claimed in claim 1 is characterized in that, said charge-discharge circuit comprises:
Thermistor, an end connects said external power source;
Diode, anode connect the other end of said thermistor, and negative electrode connects said power supply circuits; And
At least one second electric capacity is connected between the negative electrode and ground of said diode.
6. network communication equipment as claimed in claim 1 is characterized in that, said power supply circuits comprise:
Pressurizer comprises input and output, and said input connects said charge-discharge circuit, and said output is exported first output voltage, is said overheated circuit for detecting and the power supply of said overheating protection circuit; And
A plurality of power transfer module; Comprise first input end, second input and output; The first input end of said power transfer module connects said charge-discharge circuit; Second input of said power transfer module connects second electrode of the second switch element of said overheating protection circuit, and the output of said power transfer module is exported a plurality of second output voltages, is said central processing unit and the power supply of said subsystem circuit.
7. network communication equipment as claimed in claim 6 is characterized in that, said subsystem circuit comprises:
First with door, comprise first input end, second input and output, said first is connected said central processing unit with the first input end of door, said first with second input be connected the control utmost point of the second switch element of said overheating protection circuit; And
Subsystem element connects one of said power transfer module, by one of said second output voltage power supply, and connect said first with the output of door.
8. network communication equipment as claimed in claim 7 is characterized in that, said subsystem circuit also comprises:
Second with door, comprise first input end, second input and output, said second is connected said voltage detection circuit with the first input end of door, said second with second input be connected the control utmost point of the second switch element of said overheating protection circuit; And
The USB power subsystem, connect said second with the output of door, be used for according to said second with the control of door, be the power supply of external USB client.
9. a network communication equipment is used to produce power-off signal and is sent to local side apparatus, it is characterized in that said network communication equipment comprises:
Voltage detection circuit connects external power source, is used to detect the voltage of said external power source;
Charge-discharge circuit connects said external power source, is used for charging when said external power source is worked, and discharge when said external power source breaks off;
Power supply circuits connect said charge-discharge circuit, are used for converting said external power source into a plurality of output voltages, are said network communication equipment power supply;
Central processing unit; Connect said voltage detection circuit and said power supply circuits; Comprise outage detecting pin; Said outage detecting pin connects said voltage detection circuit to obtain said detecting voltage, and said central processing unit is used for judging according to said detecting voltage whether said external power source breaks off, and when said external power source breaks off, produces power-off signal;
Subsystem circuit connects said central processing unit and said power supply circuits, is used for carrying out work according to the control of said central processing unit;
Overheated circuit for detecting, whether be used to detect said network communication equipment overheated; And
Overheating protection circuit; The outage detecting pin that connects said overheated circuit for detecting and central processing unit; Be used for when said network communication equipment is overheated; Change the voltage of said outage detecting pin,, and turn-off said subsystem circuit immediately and slowly turn-off said power supply circuits so that said central processing unit produces power-off signal.
10. network communication equipment as claimed in claim 9 is characterized in that, said overheating protection circuit comprises:
First switch element comprises the control utmost point, first electrode and second electrode, and said first electrode connects said outage detecting pin, and said second electrode is via first grounding through resistance, and the said control utmost point connects said overheated circuit for detecting via second resistance;
The second switch element; Comprise the control utmost point, first electrode and second electrode; The control utmost point of said second switch element connects the control utmost point of said first switch element and connects said subsystem circuit via said second resistance; First electrode of said second switch element receives first voltage, and second electrode of said second switch element is via the 3rd grounding through resistance and connect said power supply circuits; And
First electric capacity, parallelly connected with said the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110141645.3A CN102801536B (en) | 2011-05-27 | 2011-05-27 | Network communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110141645.3A CN102801536B (en) | 2011-05-27 | 2011-05-27 | Network communication equipment |
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| CN102801536A true CN102801536A (en) | 2012-11-28 |
| CN102801536B CN102801536B (en) | 2014-12-10 |
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| CN201110141645.3A Active CN102801536B (en) | 2011-05-27 | 2011-05-27 | Network communication equipment |
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Citations (6)
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| CN201733320U (en) * | 2010-07-15 | 2011-02-02 | 鸿富锦精密工业（深圳）有限公司 | Network equipment |
| US20120300353A1 (en) * | 2011-05-27 | 2012-11-29 | Hon Hai Precision Industry Co., Ltd. | Network communication device |
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| CN1921405A (en) * | 2005-08-26 | 2007-02-28 | 鸿富锦精密工业（深圳）有限公司 | Network equipment capable of generating electric-breaking signal |
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| CN201656433U (en) * | 2010-02-05 | 2010-11-24 | 国基电子（上海）有限公司 | Overheat protection circuit and electronic equipment using overheat protection circuit |
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| US20120300353A1 (en) * | 2011-05-27 | 2012-11-29 | Hon Hai Precision Industry Co., Ltd. | Network communication device |
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| CN102801536B (en) | 2014-12-10 |
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Effective date of registration: 20170601 Address after: Xiaoshan District of Hangzhou City, Zhejiang province Wen Yan Street No. 1711, Hunan Patentee after: Hangzhou Avisi Electronic Co., Ltd. Address before: 201613 Shanghai City, Songjiang District Shanghai city south of Songjiang Export Processing Zone Road No. 1925 Co-patentee before: Hon Hai Precision Industry Co., Ltd. Patentee before: Ambit Microsystems (Shanghai) Co., Ltd. |