CN210742467U - Device for realizing Dying Gasp function based on NP (network processor) chip - Google Patents
Device for realizing Dying Gasp function based on NP (network processor) chip Download PDFInfo
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- CN210742467U CN210742467U CN201921575951.6U CN201921575951U CN210742467U CN 210742467 U CN210742467 U CN 210742467U CN 201921575951 U CN201921575951 U CN 201921575951U CN 210742467 U CN210742467 U CN 210742467U
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Abstract
The utility model relates to a device for realizing Dying Gasp function based on NP chip, which is connected to the DC power supply of communication equipment, comprising a power failure detection circuit, a voltage conversion circuit and an NP chip which are connected with each other, wherein the detection end of the power failure detection circuit is connected with the voltage conversion circuit and the power input end, and the power failure detection circuit is connected with the interrupt signal input end of the NP chip; the output end of the voltage conversion circuit provides a working power supply for the power failure detection circuit and the NP chip; the interrupt processing module of the NP chip is used for receiving the power failure signal and sending a power failure alarm signal; warning messages are prestored in a power failure warning module of the NP chip, and the warning messages are sent out after power failure warning signals are received. After power failure, the energy storage module discharges in a short time to provide a working power supply for the NP chip and the power failure detection circuit so as to ensure that an alarm message is sent out; the device is arranged in the communication equipment, shares an NP chip with the communication equipment, has small volume, does not occupy additional equipment space, and saves equipment cost.
Description
Technical Field
The utility model relates to a communication equipment field, concretely relates to realize device of Dying Gasp function based on NP chip.
Background
The Dying Gasp function means that after the input voltage of the equipment is powered off, the product can also work for a period of time, and the power-off information is reported so that the uplink equipment can store important information and the like. When a communication device used in an engineering field encounters a fault of the device, a manager cannot easily distinguish whether a transmission line of the transmission device is in a problem or a power supply is in a problem, so that the communication device is required to send an alarm event to inform a network management whether the network management is a power supply system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a device based on NP chip realizes DyingGasp function, the device sets up inside communication equipment, with communication equipment sharing NP chip, and is small, does not additionally occupy the equipment space when accomplishing the electricity and report an emergency and ask for help or increased vigilance the function, has saved equipment cost.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a device for realizing Dying Gasp function based on NP chip, the power input end of which is connected with the DC power supply of the communication equipment, comprises a power failure detection circuit, a voltage conversion circuit and an NP chip which are connected with each other, the detection input end of the power failure detection circuit is connected with the power input end of the device, the detection output end of the power failure detection circuit is connected with the interrupt signal input end of the NP chip and is used for detecting whether the input power supply is in power failure or not and outputting a power failure signal; the input end of the voltage conversion circuit is connected with the power input end of the device, and the output end of the voltage conversion circuit is respectively connected with the power failure detection circuit and the NP chip and is used for providing working power for the power failure detection circuit and the NP chip; the NP chip comprises an interrupt processing module and a power failure alarm module, wherein the interrupt processing module is used for receiving a power failure signal and sending a power failure alarm signal; and the power failure alarm module is internally prestored with an alarm message and is used for receiving the power failure alarm signal and sending the alarm message.
When detecting that the direct-current power supply is powered down, the device sends an interrupt signal to the NP chip in time, and the NP chip sends a preset alarm message to remind a worker of power failure; the voltage conversion circuit provides a working power supply for the NP chip and the power failure detection circuit so as to ensure the sending of an alarm message; the device is arranged in the communication equipment, shares an NP chip with the communication equipment, has small volume, does not additionally occupy the equipment space when finishing the power failure alarm function, and saves the equipment cost.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the voltage conversion circuit comprises an anti-reverse diode and a DC-DC voltage reduction chip which are sequentially connected in series, wherein the negative electrode of the anti-reverse diode is connected with the positive electrode of the power input end, the positive electrode of the anti-reverse diode is connected with the voltage input end of the DC-DC voltage reduction chip, and the voltage output end of the DC-DC voltage reduction chip is respectively connected with the working power input end of the NP chip and the working power input end of the power failure detection circuit. In the working process of the device, when the anti-reverse diode prevents a power supply from being powered off, the capacitor in a rear circuit discharges to cause interference on a power failure detection circuit, so that the accuracy of a detection result is protected; the DC-DC voltage reduction chip converts the direct-current power supply voltage of the communication equipment into direct-current voltage suitable for the device, and provides a reliable working power supply for the device.
Furthermore, the voltage conversion circuit also comprises an energy storage module, wherein the anode of the energy storage module is connected with the anode of the anti-reverse diode, and the cathode of the energy storage module is grounded; the energy storage module comprises a plurality of electrolytic capacitors connected in parallel, the anodes of the electrolytic capacitors are connected with the anode of the anti-reverse diode, and the cathodes of the electrolytic capacitors are grounded. When the power failure detection circuit is in a normal working state, the direct-current power supply of the communication equipment charges an electrolytic capacitor of the energy storage module, when the power failure detection circuit is in a power failure state, the energy storage module discharges, and a working power supply is continuously provided for the power failure detection circuit and the NP chip, so that the power failure detection circuit outputs a power failure interrupt signal to the NP chip, and the NP chip sends a power failure warning message in time.
Further, the energy storage module is further provided with a transient suppression diode, the transient suppression diode is arranged in a reverse bias mode, the anode of the transient suppression diode is connected with the anodes of the electrolytic capacitors, and the cathode of the transient suppression diode is grounded. The transient suppression diode is reversely biased and connected with the following circuit in parallel, when the voltage of the transient suppression diode exceeds a breakdown level, the transient suppression diode directly shunts excessive current, absorbs peak energy possibly occurring in the circuit and clamps the voltage of the circuit within the breakdown voltage of the transient suppression diode; when the overvoltage disappears, the transient suppression diode can automatically reset, and a circuit behind the transient suppression diode is effectively protected from voltage spikes introduced by a power supply wire.
Furthermore, the power failure detection circuit comprises two divider resistors, two triodes and two pull-up resistors which are connected in series, a common node of the two divider resistors is connected with a base electrode of a first triode, an emitting electrode of the first triode is grounded, and a collector electrode of the first triode is connected with a voltage output end of the voltage conversion circuit after being connected with the first pull-up resistor in series; the base electrode of the second triode is connected with the common node of the collector electrode of the first triode and the pull-up resistor, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the voltage output end of the voltage conversion circuit after being connected with the second pull-up resistor in series; and the common node of the collector of the second triode and the pull-up resistor is connected with the interrupt signal input end of the NP chip. The triode is used as an electronic switch in the power failure detection circuit, and has the advantages of small volume, no mechanical contact, high switching speed and convenience in controlling on-off by using an electric signal. The pull-up resistor prevents the voltage from being suspended, so that the instability of the circuit is caused, and the application of the pull-up resistor in the circuit is to fix the interrupt signal input end of an NP chip at a high level. When power failure does not occur, the direct current power supply voltage of the device provides input for the base electrode of the first triode, at the moment, the first triode is in a conducting state, the collector electrode of the first triode is grounded after being in short circuit with the emitter electrode, and the collector electrode of the first triode is in a low potential. Because the collector of the first triode is used as the base input of the second triode, the second triode is in a cut-off state at the moment, and the interrupt signal input end of the NP chip always keeps high-level input. When power failure occurs, the base input of the first triode is not enough to enable the collector and the emitter of the first triode to be conducted, so that the first triode is cut off at the moment, the collector of the first triode is connected with a working power supply, and the first triode is in a high potential state; the collector of the first triode provides high potential input for the base of the second triode, the collector of the second triode is grounded after being conducted with the emitter, the collector of the second triode becomes low potential at the moment, the interrupt signal input end of the NP chip becomes low level input, and the NP chip receives a power failure signal.
Furthermore, a filter capacitor is arranged on the collector of the second triode, one end of the filter capacitor is connected with the collector of the second triode, and the other end of the filter capacitor is grounded, so that signal jitter of the detection output end of the power failure detection circuit is prevented, and the detection result is inaccurate.
Further, the triode is an NPN type triode. When the base of the NPN type triode is high voltage, the collector and the emitter of the NPN type triode are in short circuit, namely are conducted; the base of the NPN type triode is low voltage, and the collector and the emitter of the NPN type triode are open-circuited, namely cut off.
Further, the DC-DC voltage reduction chip is SY 8205. SY8205 is a relatively mature DC-DC step-down chip, and has an inherent wiring mode, and the input voltage range before step-down is 4.5V ~ 30V, provides 3.3V output voltage, can satisfy the user demand of this device.
The power failure detection circuit comprises a power input end, a power failure detection circuit, a common-mode inductor and a power supply control circuit, wherein the power supply input end is connected with the power failure detection circuit through the common-mode inductor, the common-mode inductor is arranged between the power input end and the power failure detection circuit, a first inductor of the common-mode inductor is connected with the anode of the power input end in series, and a second inductor of the common-mode inductor is connected with the. The common mode inductor provides filtering for the power line and filters common mode electromagnetic interference signals.
Further, the power supply further comprises a fuse, and the fuse is connected between the anode of the power supply input end and the first inductor of the common-mode inductor in series. The fuse prevents the abnormal flow of excessive current from the DC power supply to burn out the following circuit, and provides effective overcurrent protection for the device.
The utility model has the advantages that: the utility model discloses a device based on NP chip realizes DyingGasp function, when detecting direct current power supply and cutting off the power supply, in time send interrupt signal to the NP chip, the NP chip will predetermine and report an emergency and ask for help or increased vigilance the message and send to remind the staff to have power failure; after power failure, the energy storage module discharges in a short time to provide a working power supply for the NP chip and the power failure detection circuit so as to ensure that an alarm message is sent out; the device is arranged in the communication equipment, shares an NP chip with the communication equipment, has small volume, does not additionally occupy the equipment space when finishing the power failure alarm function, and saves the equipment cost.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of the power down detection circuit of the present invention;
FIG. 3 shows the voltage conversion circuit principle of the present invention;
fig. 4 is a block diagram of the system of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
f1, a fuse, C1-C3, an electrolytic capacitor, C6, a coupling capacitor, C4-C5/C7-C21, a filter capacitor, R1-R2/R5-R8, a voltage dividing resistor, R3-R4, a pull-up resistor, R9, a current sampling resistor, L1, a common mode inductor, L2, an inductor, D1, an anti-reverse diode, U1, a DC-DC voltage reduction chip, CON3, a plug terminal, TVS and a transient suppression diode.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The device for realizing the Dying Gasp function based on the NP chip shown in fig. 1 to 4 is arranged in the communication device, and is used for detecting whether the communication device is powered down or not and sending a power down warning message when the power is down. The power input end of the communication device is connected with a direct current power supply of the communication device, and the NP chip of the communication device shares the NP chip. The device comprises a power failure detection circuit, a voltage conversion circuit and an NP chip which are mutually connected, wherein the detection input end of the power failure detection circuit is connected with the power supply input end of the device, and the detection output end of the power failure detection circuit is connected with the interrupt signal input end of the NP chip and is used for detecting whether an input power supply has power failure or not and outputting a power failure signal; the input end of the voltage conversion circuit is connected with the power input end of the device, and the output end of the voltage conversion circuit is respectively connected with the power failure detection circuit and the NP chip and is used for providing working power for the power failure detection circuit and the NP chip; the NP chip comprises an interrupt processing module and a power failure alarm module, wherein the interrupt processing module is used for receiving a power failure signal and sending a power failure alarm signal; and the power failure alarm module is internally prestored with an alarm message and is used for receiving the power failure alarm signal and sending the alarm message.
When detecting that the direct-current power supply is powered down, the device sends an interrupt signal to the NP chip in time, and the NP chip sends a preset alarm message to remind a worker of power failure; the voltage conversion circuit provides a working power supply for the NP chip and the power failure detection circuit so as to ensure the sending of an alarm message; the device is arranged in the communication equipment, shares an NP chip with the communication equipment, has small volume, does not additionally occupy the equipment space when finishing the power failure alarm function, and saves the equipment cost.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
The voltage conversion circuit will now be described with reference to specific circuit diagrams. As shown in fig. 1 and 3, the present apparatus uses the connection terminal CON3 as a DC power input terminal of the apparatus, and is connected to a DC12V DC power supply of a communication device. The voltage conversion circuit comprises an anti-reverse diode D1 and a DC-DC buck chip U1 which are sequentially connected in series, wherein the cathode of the anti-reverse diode D1 is connected with the anode of the power input end, namely the 3 pin of a plug terminal CON3 in FIG. 2, the anode of the anti-reverse diode D1 is connected with the voltage input end of the DC-DC buck chip U1, and the voltage output end of the DC-DC buck chip U1 is respectively connected with the working power input end of the NP chip (namely VDD _ MAIN _3.3V in FIG. 3) and the working power input end of the power-down detection circuit (namely VDD _3.3V in FIG. 2). In the working process of the device, the anti-reverse diode D1 is used for preventing the electrolytic capacitor and the filter capacitor in the rear circuit from discharging to cause interference to the power failure detection circuit when the power supply is powered down, so that the accuracy of the detection result is protected; the DC-DC voltage reduction chip U1 converts DC12V DC power supply voltage of the communication equipment into DC voltage DC3.3V suitable for the device, and provides reliable working power supply for the device.
Further, the DC-DC voltage reduction chip U1 is SY 8205. According to actual needs, other types of direct current buck chips can be adopted, and in the embodiment, SY8205 is adopted as the DC-DC buck chip U1. SY8205 is a relatively mature DC-DC step-down chip, and has an inherent wiring mode, and the input voltage range before step-down is 4.5V ~ 30V, provides 3.3V output voltage, can satisfy the user demand of this device. In this embodiment, as shown in fig. 3, the specific connection manner of the DC-DC voltage reduction chip U1 is as follows: a VIN1 pin and a VIN2 pin are connected with a DC12V power supply input, the DC12V power supply input is also connected with a divider resistor R5 and a divider resistor R6 which are sequentially connected in series and then grounded, a common node of the divider resistor R5 and the divider resistor R6 is connected with an enable pin EN to ensure that the enable pin EN is in high-level input, and a filter capacitor C9 is connected to the divider resistor R6 in parallel and used for high-frequency filtering; the VCC pin is grounded after being connected with the filter capacitor C7 in series, and the filter capacitor C7 filters out high-frequency waves, so that the voltage output by the DC-DC voltage reduction chip U1 is more stable; g pin is grounded; the SS pin is a delayed start control end of a DC-DC voltage reduction chip U1, is connected with a filter capacitor C8, an LX pin is used as PWM output, and is connected with an inductor L2, and DC3.3V voltage is output at one end of the inductor L2 opposite to the LX pin and is used for providing working voltage for an NP chip and a power failure detection circuit; the BS pin is a bootstrap voltage input and is connected with the LX pin after being connected with a 100nF coupling capacitor C6 in series; the FB pin is used as a feedback input and used for detecting an output voltage value of the chip, a voltage division resistor R8 and a voltage division resistor R7 are sequentially connected in series at a voltage output end VDD _3.3V in fig. 3 and then grounded, a common node of the voltage division resistor R8 and the voltage division resistor R7 is connected with the FB pin, and a capacitor C10 is connected to the voltage division resistor R8 in parallel and used for filtering high-frequency waves. In order to more effectively ensure that the voltage conversion circuit outputs a stable 3.3V voltage, several filter capacitors connected in parallel are respectively disposed at the VIN pin and the LX pin of the DC-DC buck chip U1, specifically, as shown in fig. 3, a filter capacitor C11, a filter capacitor C12, a filter capacitor C13, and a filter capacitor C14 are disposed in parallel at the VIN pin, and a filter capacitor C15, a filter capacitor C16, a filter capacitor C17, a filter capacitor C18, a filter capacitor C19, a filter capacitor C20, and a filter capacitor C21 are disposed in parallel at an end of the inductor L2 opposite to the LX pin. In order to determine the reliability of the output power of the voltage conversion circuit, a current sampling resistor R9 may be further disposed at the voltage output terminal VDD _3.3V to monitor the current.
Further, the voltage conversion circuit further comprises an energy storage module, wherein the anode of the energy storage module is connected with the anode of the anti-reverse diode D1, and the cathode of the energy storage module is grounded; the energy storage module comprises a plurality of electrolytic capacitors connected in parallel, the anodes of the electrolytic capacitors are connected with the anode of the anti-reverse diode, and the cathodes of the electrolytic capacitors are grounded. As shown in fig. 1, the electrolytic capacitor C1, the electrolytic capacitor C2 and the electrolytic capacitor C3 are connected in parallel and then connected to the positive electrode of the anti-reflection diode D1, and the negative electrodes of the electrolytic capacitor C1, the electrolytic capacitor C2 and the electrolytic capacitor C3 are grounded. The energy storage module is also provided with a filter capacitor C4 in parallel for filtering high-frequency waves of the input power supply. After the plurality of electrolytic capacitors are connected in parallel, the equivalent series resistance is reduced, meanwhile, ripple current can be distributed to the plurality of capacitors, each capacitor can work under rated ripple current, but in actual use, if the ripple current is distributed evenly, the lead impedance of each capacitor and the ripple current source is the same, namely the length and the width of a connecting line of the anti-reverse diode D1 and the anode of each electrolytic capacitor are the same, and the filtering effect is optimal. When the power failure detection circuit is in a normal working state, the direct-current power supply of the communication equipment charges an electrolytic capacitor of the energy storage module, when the power failure detection circuit is in a power failure state, the energy storage module discharges, and a working power supply is continuously provided for the power failure detection circuit and the NP chip, so that the power failure detection circuit outputs a power failure interrupt signal to the NP chip, and the NP chip sends a power failure warning message in time.
In this embodiment, the energy storage module is further provided with a transient suppression diode TVS, the transient suppression diode TVS is reversely biased, the positive electrode of the transient suppression diode TVS is connected with the positive electrodes of the electrolytic capacitors, and the negative electrode of the transient suppression diode TVS is grounded. The transient suppression diode TVS is reversely biased and is connected with a circuit behind the transient suppression diode TVS in parallel, when the voltage of the transient suppression diode TVS exceeds a breakdown level, excessive current is directly shunted to absorb peak energy possibly occurring in the circuit, and the voltage of the transient suppression diode TVS is clamped within the breakdown voltage of the transient suppression diode TVS; when the overvoltage disappears, the transient suppression diode TVS can automatically reset, and the following circuit is effectively protected from being damaged by voltage spikes introduced by a power supply lead.
As shown in fig. 2, the power-down detection circuit includes two voltage-dividing resistors (voltage-dividing resistor R1 and voltage-dividing resistor R2), two transistors (transistor Q1 and transistor Q2), and two pull-up resistors (pull-up resistor R3 and pull-up resistor R4) connected in series. The triode is of the type MMBT 3904. The common node of the voltage dividing resistor R1 and the voltage dividing resistor R2 is connected with the base electrode of the triode Q2, the emitter electrode of the triode Q2 is grounded, and the collector electrode of the triode Q2 is connected with the pull-up resistor R3 in series and then is connected with the voltage output end (VDD _3.3V) of the voltage conversion circuit; the base electrode of the triode Q1 is connected with the common node of the collector electrode of the triode Q2 and the pull-up resistor R3, the emitter electrode of the triode Q1 is grounded, and the collector electrode of the triode Q1 is connected with the pull-up resistor R4 in series and then is connected with the voltage output end (VDD _3.3V) of the voltage conversion circuit; the collector of the transistor Q1 is connected to the interrupt signal input of the NP chip (i.e., the INTR2 pin of the NP chip) along with the common node of the pull-up resistor R4. The triode in the embodiment is used as an electronic switch in the power failure detection circuit, and has the advantages of small volume, no mechanical contact, high switching speed and convenience for controlling on and off by using an electric signal. The pull-up resistor prevents the voltage from being suspended, so that the instability of the circuit is caused, and the application of the pull-up resistor in the circuit is to fix the interrupt signal input end of an NP chip at a high level. When power failure does not occur, the direct current power supply voltage of the device provides input for the base electrode of the triode Q2, at the moment, the triode Q2 is in a conducting state, the collector electrode of the triode Q2 is grounded after being short-circuited with the emitter electrode, and the collector electrode of the triode Q2 is low in potential. Since the collector of the transistor Q2 is used as the base input of the transistor Q1, the transistor Q1 is in the off state at this time, and the interrupt signal input terminal of the NP chip always remains at the high input level. When power failure occurs, the base input of the triode Q2 is not enough to enable the collector and the emitter of the triode Q2 to be conducted, so that the triode Q2 is cut off at the moment, the collector of the triode Q2 is connected with a working power supply, and the triode Q2 is in a high potential state; the collector of the triode Q2 provides high potential input for the base of the triode Q1, the collector of the triode Q1 is grounded after being conducted with the emitter, the collector of the triode Q1 becomes low potential at the moment, the interrupt signal input end of the NP chip becomes low level input, and the NP chip receives a power failure signal.
Further, triode Q1's collecting electrode is provided with filter capacitor C5, filter capacitor C5 one end is connected with triode Q1's collecting electrode, filter capacitor C5's other end ground connection prevents to fall the detection output of power failure detection circuit and takes place the signal shake, makes the testing result inaccurate.
Further, the transistor Q1 and the transistor Q2 are both NPN transistors. When the base of the NPN type triode is high voltage, the collector and the emitter of the NPN type triode are in short circuit, namely are conducted; the base of the NPN type triode is low voltage, and the collector and the emitter of the NPN type triode are open-circuited, namely cut off.
Further, the power failure detection circuit further comprises a common-mode inductor L1, the common-mode inductor L1 is arranged between the power input end and the power failure detection circuit, a first inductor of the common-mode inductor L1 is connected in series with the positive electrode of the power input end, and a second inductor of the common-mode inductor is connected in series with the negative electrode of the power input end. The common mode inductor L1 provides filtering for the power line and filters common mode electromagnetic interference signals.
Further, a fuse F1 is included, the fuse being connected in series between the positive terminal of the power input terminal and the first inductor of the common mode inductor L1. The fuse F1 prevents the abnormal flow of excessive current from the dc power source to burn out the following circuits, providing effective overcurrent protection for the device.
The utility model has the advantages that: the utility model discloses a device based on NP chip realizes DyingGasp function, when detecting direct current power supply and cutting off the power supply, in time send interrupt signal to the NP chip, the NP chip will predetermine and report an emergency and ask for help or increased vigilance the message and send to remind the staff to have power failure; after power failure, the energy storage module discharges in a short time to provide a working power supply for the NP chip and the power failure detection circuit so as to ensure that an alarm message is sent out; the device is arranged in the communication equipment, shares an NP chip with the communication equipment, has small volume, does not additionally occupy the equipment space when finishing the power failure alarm function, and saves the equipment cost.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A device for realizing Dying Gasp function based on NP chip, the power input end of which is connected with the DC power supply of the communication equipment, is characterized in that the device comprises a power failure detection circuit, a voltage conversion circuit and an NP chip which are connected with each other, the detection input end of the power failure detection circuit is connected with the power input end of the device, the detection output end of the power failure detection circuit is connected with the interrupt signal input end of the NP chip and is used for detecting whether the input power supply is in power failure or not and outputting a power failure signal; the input end of the voltage conversion circuit is connected with the power input end of the device, and the output end of the voltage conversion circuit is respectively connected with the power failure detection circuit and the NP chip and is used for providing working power for the power failure detection circuit and the NP chip; the NP chip comprises an interrupt processing module and a power failure alarm module, wherein the interrupt processing module is used for receiving a power failure signal and sending a power failure alarm signal; and the power failure alarm module is internally prestored with an alarm message and is used for receiving the power failure alarm signal and sending the alarm message.
2. The device as claimed in claim 1, wherein the voltage conversion circuit comprises an anti-reverse diode and a DC-DC buck chip connected in series in sequence, a cathode of the anti-reverse diode is connected to an anode of the power input terminal, an anode of the anti-reverse diode is connected to a voltage input terminal of the DC-DC buck chip, and a voltage output terminal of the DC-DC buck chip is connected to the working power input terminal of the NP chip and the working power input terminal of the power down detection circuit, respectively.
3. The NP-chip-based device for realizing Dying Gasp function according to claim 2, wherein the voltage conversion circuit further comprises an energy storage module, the anode of the energy storage module is connected with the anode of the anti-reverse diode, and the cathode of the energy storage module is grounded; the energy storage module comprises a plurality of electrolytic capacitors connected in parallel, the anodes of the electrolytic capacitors are connected with the anode of the anti-reverse diode, and the cathodes of the electrolytic capacitors are grounded.
4. The NP-chip-based device for realizing Dying Gasp function according to claim 3, wherein the energy storage module is further provided with a transient suppression diode, the transient suppression diode is reversely arranged, the anode of the transient suppression diode is connected with the anodes of the plurality of electrolytic capacitors, and the cathode of the transient suppression diode is grounded.
5. The device for realizing Dying Gasp function based on the NP chip is characterized in that the power-down detection circuit comprises two divider resistors, two triodes and two pull-up resistors which are connected in series, wherein a common node of the two divider resistors is connected with a base electrode of a first triode, an emitter electrode of the first triode is grounded, and a collector electrode of the first triode is connected with a voltage output end of the voltage conversion circuit after being connected with the first pull-up resistor in series; the base electrode of the second triode is connected with the common node of the collector electrode of the first triode and the pull-up resistor, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the voltage output end of the voltage conversion circuit after being connected with the second pull-up resistor in series; and the common node of the collector of the second triode and the pull-up resistor is connected with the interrupt signal input end of the NP chip.
6. The apparatus as claimed in claim 5, wherein a second of the transistors has a filter capacitor at its collector, one end of the filter capacitor is connected to the collector of the second transistor, and the other end of the filter capacitor is grounded.
7. The apparatus as claimed in claim 5, wherein the triode is an NPN type triode.
8. The NP-based chip capable of realizing Dying Gasp function according to claim 2, wherein the DC-DC voltage reduction chip is SY 8205.
9. The apparatus of claim 1, further comprising a common-mode inductor, wherein the common-mode inductor is disposed between the power input terminal and the power-down detection circuit, a first inductor of the common-mode inductor is connected in series with a positive terminal of the power input terminal, and a second inductor of the common-mode inductor is connected in series with a negative terminal of the power input terminal.
10. The apparatus of claim 9, further comprising a fuse connected in series between the positive terminal of the power input terminal and the first inductor of the common mode inductor.
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| CN201921575951.6U CN210742467U (en) | 2019-09-22 | 2019-09-22 | Device for realizing Dying Gasp function based on NP (network processor) chip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111865273A (en) * | 2020-07-29 | 2020-10-30 | Oppo广东移动通信有限公司 | Power failure reminding circuit and CPE (customer premise Equipment) |
| CN112886697A (en) * | 2020-12-31 | 2021-06-01 | 杭州堃博生物科技有限公司 | Injection pump and power supply circuit thereof |
| CN113899939A (en) * | 2021-12-10 | 2022-01-07 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
| CN115932386A (en) * | 2023-03-09 | 2023-04-07 | 深圳龙电华鑫控股集团股份有限公司 | Electric energy metering circuit and electric energy metering device |
| CN118102152A (en) * | 2024-04-28 | 2024-05-28 | 中兴通讯股份有限公司 | Power failure warning system and network equipment |
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2019
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| CN111865273A (en) * | 2020-07-29 | 2020-10-30 | Oppo广东移动通信有限公司 | Power failure reminding circuit and CPE (customer premise Equipment) |
| CN112886697A (en) * | 2020-12-31 | 2021-06-01 | 杭州堃博生物科技有限公司 | Injection pump and power supply circuit thereof |
| CN113899939A (en) * | 2021-12-10 | 2022-01-07 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
| CN113899939B (en) * | 2021-12-10 | 2022-03-29 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
| WO2023104196A1 (en) * | 2021-12-10 | 2023-06-15 | 广东省新一代通信与网络创新研究院 | Power failure alarm circuit for communication device, power failure alarm processing method for communication device, and communication device |
| CN115932386A (en) * | 2023-03-09 | 2023-04-07 | 深圳龙电华鑫控股集团股份有限公司 | Electric energy metering circuit and electric energy metering device |
| CN118102152A (en) * | 2024-04-28 | 2024-05-28 | 中兴通讯股份有限公司 | Power failure warning system and network equipment |
| CN118102152B (en) * | 2024-04-28 | 2024-07-23 | 中兴通讯股份有限公司 | Power failure warning system and network equipment |
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