A power failure DYING GASP reporting delay circuit and electronic product
By designing a DYING GASP reporting delay circuit for power outages, the problem of data loss caused by sudden power outages in communication equipment was solved, enabling complete data reporting and stable system operation after power failure, thus enhancing the reliability and lifespan of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JWIPC TECH CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-06-05
AI Technical Summary
During data exchange in communication equipment, a sudden power outage can lead to the loss of critical data, especially when capacitor energy storage efficiency is low under low voltage input, making it impossible to maintain stable transmission of critical information.
Design a power failure DYING GASP reporting delay circuit, including a DC input power supply, a voltage detection module, a boost module, a switching switch, an energy storage capacitor, and a DC/DC power supply module. By monitoring the voltage in real time and switching to energy storage capacitor power supply when power is lost, the system can be ensured to operate normally for at least 10ms after power failure.
It enables complete data reporting during power outages, prevents communication interruptions, ensures stable transmission of critical data, and improves system reliability and lifespan through backflow protection and adaptive voltage detection.
Smart Images
Figure CN224329209U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic circuit technology, and more specifically, to a power-off DYING GASP reporting delay circuit and electronic product. Background Technology
[0002] Currently, during the operation of communication equipment switching devices, there is usually data interaction with the upper-level equipment. During the data interaction, it is necessary to maintain stable data transmission to avoid the loss of critical data due to sudden downtime. Under low voltage input, the energy storage efficiency of capacitors is low, which means that the equipment does not have enough time to retain the critical information of the equipment and report the abnormality to the upper-level equipment. Therefore, a circuit solution with power failure DYING GAPS reporting function is needed. Utility Model Content
[0003] The technical problem to be solved by this utility model is how to solve the problem of critical data loss caused by sudden power failure of equipment during data exchange. In view of the above-mentioned defects of the prior art, a DYING GASP reporting delay circuit and electronic product after power failure are provided.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] on the one hand
[0006] A power failure DYING GASP reporting delay circuit includes a DC input power supply, the output terminal of which is connected in series with a voltage detection module and a boost module, the output terminal of which is connected to a switching switch, and the power supply terminal of the switching switch is connected to an energy storage capacitor C2.
[0007] The voltage detection module is used to monitor the voltage of the DC input power supply in real time and generate a power-off trigger signal when the detected voltage is lower than a preset threshold.
[0008] The boost module boosts the input voltage to the target value when the power supply is normal and charges the energy storage capacitor C2.
[0009] The switching switch has its control terminal connected to the output terminal of the voltage detection module. The switching switch is controlled by the power failure trigger signal and is used to switch to the energy storage capacitor C2 to supply power to the system when the power is off.
[0010] Preferably, the boost module is a PoE power supply module, the enable terminal of the boost module is connected to the output terminal of the voltage detection module, and the boost function of the PoE power supply module is disabled when the power-off trigger signal is low.
[0011] Preferably, a MOSFET D1 is connected in series between the DC input power supply and the boost module. The drain of the MOSFET D1 is connected to the DC input power supply, the source of the MOSFET D1 is connected to the boost module, and the gate of the MOSFET D1 receives the output signal of the voltage detection module. The MOSFET D1 is used to block the current from flowing back to the DC input power supply when the power-off trigger signal is active.
[0012] Preferably, the voltage detection module includes a voltage divider resistor network and a voltage comparator. The voltage divider resistor network performs voltage divider sampling on the DC input power supply and inputs the sampled voltage into the voltage comparator for comparison with a reference voltage. The output of the voltage comparator generates the power-off trigger signal.
[0013] Preferably, a filter capacitor C1 is connected in parallel between the source of the MOS transistor D1 and ground, and the filter capacitor C1 is used to suppress high-frequency power supply noise.
[0014] Preferably, the output terminal of the switching switch is connected to a DC / DC power module, which is used to convert the output voltage of the energy storage capacitor C2 into the system operating voltage during power failure and maintain system operation for at least 10ms to meet the DYING GASP signal reporting requirements.
[0015] Preferably, the switching switch is a magnetic latching relay, whose coil drive end is connected to the output end of the voltage detection module. When the power-off trigger signal is low, the relay switches to the power supply state of the energy storage capacitor C2.
[0016] on the other hand
[0017] An electronic product, wherein the electronic product is provided with any of the power failure DYING GASP reporting delay circuits.
[0018] The beneficial effects of this utility model are as follows:
[0019] 1. Power failure delayed reporting function: The boost module and DC / DC module work together to efficiently convert the energy of the energy storage capacitor C2 into the system's usable voltage. The energy storage capacitor C2 provides the system with at least 10ms of continuous power supply at the moment of power failure, ensuring that the DYING GASP signal is reported completely and avoiding data loss due to communication interruption.
[0020] 2. Current reverse flow protection: When the power-off trigger signal is activated, MOSFET D1 cuts off the DC input power supply circuit to prevent the energy of the energy storage capacitor C2 from flowing back into the power supply and causing losses.
[0021] 3. Adaptive voltage detection: The voltage divider resistor network and voltage comparator monitor the input voltage in real time, and the threshold is adjustable to adapt to different power supply scenarios.
[0022] 4. The filter capacitor can effectively suppress high-frequency noise, resist interference, and ensure the sampling accuracy of the voltage detection module;
[0023] 5. Low-power switching control: The magnetic latching relay only activates during power failure and consumes no power under normal conditions, effectively extending the equipment's lifespan. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the overall structure of the power-off DYING GASP reporting delay circuit in an embodiment of this application. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, of the embodiments of this utility model. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] The technical solution adopted by this utility model to solve its technical problem is:
[0028] Example 1
[0029] The preferred embodiment of this utility model is as follows: Figure 1 As shown, a power-off DYING GASP reporting delay circuit is included, comprising a DC input power supply, a voltage detection module, a boost module, a switching switch, a DC / DC power supply module, a MOSFET D1, a filter capacitor C1, and an energy storage capacitor C2.
[0030] Both the voltage detection module and the boost module are connected to the DC input power supply. The voltage detection module includes a voltage divider resistor network and a voltage comparator. The voltage divider resistor network performs voltage division sampling on the DC input power supply and inputs the sampled voltage to the voltage comparator for comparison with a reference voltage. The output of the voltage comparator generates a power-off trigger signal. As an optional embodiment, the voltage detection module is implemented using a reset chip SGM706. The SGM706 chip has a built-in voltage comparator, and through the configuration of the voltage divider resistors, it can realize the voltage power-off detection function.
[0031] The boost module is a PoE power supply module. Its enable terminal is connected to the voltage detection module to boost the DC input voltage to the target value and charge the energy storage capacitor C2. Alternatively, the boost module can be implemented using a 12V to 48V PoE power supply based on the LM5022 chip integrated into the motherboard. The 48V output itself supplies PoE power and also includes the C2 energy storage capacitor, simultaneously charging it.
[0032] The switching switch is connected to the boost module; the energy storage capacitor C2 is connected to the switching switch, and the other end of the energy storage capacitor is grounded. The energy storage capacitor C2 is used to store electrical energy when the power supply is normal; the voltage detection module is used to monitor the power supply voltage in real time and generate a power-off trigger signal when the detected voltage is lower than a preset threshold; the switching switch is a magnetic latching relay, and its coil drive end is connected to the output end of the voltage detection module. When the power-off trigger signal is low, the relay switches to the power supply state of the energy storage capacitor C2.
[0033] The control terminal of the switch is connected to the output terminal of the voltage detection module. The switch is controlled by a power-off trigger signal and is used to switch to power supply from the energy storage capacitor C2 when power is off. The switch is a relay, triggered by a low-level signal output from the voltage detection module, and is used to connect the energy storage capacitor C2 to the DC / DC power supply module.
[0034] MOSFET D1 is connected in series between the DC input power supply and the boost module. The drain of MOSFET D1 is connected to the DC input power supply, and the source of MOSFET D1 is connected to the boost module. The gate of MOSFET D1 is controlled by the output signal of the voltage detection module. When MOSFET D1 is turned off, it prevents reverse current flow. The energy storage capacitor C2 then starts supplying power to the DC / DC power module, extending the power output for the entire board and thus prolonging the normal operating time after a power failure, meeting the time required for the system to report DYING GASP.
[0035] The filter capacitor C1 is connected in parallel between the source of the MOSFET D1 and ground. The filter capacitor C1 is used to suppress high-frequency noise in the power supply.
[0036] The DC / DC power module is connected to the output of the switching switch. The DC / DC power module is used to convert the output voltage of the energy storage capacitor C2 into the system operating voltage during power outages and maintain system operation for at least 10ms to meet the DYING GASP signal reporting requirements.
[0037] As an optional embodiment, taking a DC input voltage of 12V as an example, a high-level indication signal is output when the DC input power supply voltage is working normally;
[0038] When the 12V power begins to drop, a voltage divider configuration is used to set the voltage to drop by 10.8V. The voltage detection module monitors the voltage drop to a certain threshold and outputs a low-level indicator signal, thereby controlling the toggle switch and the boost converter chip. The toggle switch is implemented using a relay integrated into the motherboard.
[0039] When the 12V DC power supply is working normally, MOSFET D1 is turned on, the boost module on the switch board works normally, outputs 48V and stores energy in the energy storage capacitor C2; when the input power supply starts to lose power, the voltage detection module detects the 12V power supply loss, the output level indicator signal outputs a low level, and at the same time turns off the enable terminal of the boost chip LM5022 to avoid power consumption of the module. At the same time, the enable switch allows the energy storage capacitor C2 to be interconnected with the DC / DC power module.
[0040] Example 2
[0041] An electronic product that integrates the power failure DYING GASP reporting delay circuit described in Example 1.
[0042] The implementation principle of the power failure DYING GASP reporting delay circuit in this application embodiment is as follows: When the circuit is powered normally, the voltage detection module samples the input voltage in real time through the voltage divider resistor network and compares it with the preset reference voltage. If the sampled voltage is higher than the reference value, the voltage comparator outputs a high-level signal. At this time, the MOSFET D1 is turned on, and the DC input power supply supplies power to the boost module through the MOSFET D1. The boost module boosts the input voltage to the target value and charges the energy storage capacitor C2 to full capacity. The high-level signal of the voltage detection module causes the switching switch to be in the off state, and the energy storage capacitor C2 is isolated from the power supply of the back-end system.
[0043] When the input power supply voltage drops below the preset threshold due to power failure or fault, the voltage detection module outputs a low level. The sampling voltage of the voltage divider resistor network is lower than the reference voltage. The voltage comparator flips, generating a low-level power failure trigger signal. The boost module is immediately disabled. The low-level signal turns off the boost function of the POE power supply module through the enable terminal, stopping energy conversion. The low-level signal is applied to the gate of the MOSFET, disconnecting the drain-source path and completely blocking the current conduit to the DC input path.
[0044] After the power failure trigger signal takes effect, the switch closes, and the low-level signal drives the magnetic latching relay to operate, connecting the energy storage capacitor C2 to the DC / DC power module. The energy storage capacitor C2 releases the stored electrical energy, which is then stepped down to the system operating voltage through the DC / DC module to maintain the operation of critical circuits. Within a duration of at least 10ms, the system completes the DYING GASP signal generation, data encapsulation, and network reporting process.
[0045] When the DC input power is reconnected or the voltage returns to the normal range, the voltage detection module resets, the sampled voltage is higher than the threshold, the comparator output returns to a high level, the MOSFET D1 turns on, the power supply path from the input power to the boost module is re-established, the boost module restarts, continues to charge the energy storage capacitor C2, the switch resets and disconnects, and the system switches back to the main power supply mode.
[0046] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A power-off DYING GASP reporting delay circuit, comprising a DC input power supply, characterized in that, The output terminal of the DC input power supply is connected in series with a voltage detection module and a boost module. The output terminal of the boost module is connected to a switch, and the power supply terminal of the switch is connected to an energy storage capacitor C2. The voltage detection module is used to monitor the voltage of the DC input power supply in real time and generate a power-off trigger signal when the detected voltage is lower than a preset threshold. The boost module boosts the input voltage to the target value when the power supply is normal and charges the energy storage capacitor C2. The switching switch has its control terminal connected to the output terminal of the voltage detection module. The switching switch is controlled by the power failure trigger signal and is used to switch to the energy storage capacitor C2 to supply power to the system when the power is off.
2. The power failure DYING GASP reporting delay circuit according to claim 1, characterized in that, The boost module is a PoE power supply module. The enable terminal of the boost module is connected to the output terminal of the voltage detection module. When the power-off trigger signal is low, the boost function of the PoE power supply module is disabled.
3. The power failure DYING GASP reporting delay circuit according to claim 1, characterized in that, A MOSFET D1 is connected in series between the DC input power supply and the boost module. The drain of the MOSFET D1 is connected to the DC input power supply, the source of the MOSFET D1 is connected to the boost module, and the gate of the MOSFET D1 receives the output signal of the voltage detection module. The MOSFET D1 is used to block the current from flowing back to the DC input power supply when the power-off trigger signal is active.
4. The power failure DYING GASP reporting delay circuit according to claim 1, characterized in that, The voltage detection module includes a voltage divider resistor network and a voltage comparator. The voltage divider resistor network performs voltage division sampling on the DC input power supply and inputs the sampled voltage into the voltage comparator for comparison with a reference voltage. The output of the voltage comparator generates the power-off trigger signal.
5. The power failure DYING GASP reporting delay circuit according to claim 3, characterized in that, A filter capacitor C1 is connected in parallel between the source of the MOS transistor D1 and ground. The filter capacitor C1 is used to suppress high-frequency noise in the power supply.
6. The power failure DYING GASP reporting delay circuit according to claim 1, characterized in that, The output terminal of the switching switch is connected to a DC / DC power module. The DC / DC power module is used to convert the output voltage of the energy storage capacitor C2 into the system operating voltage during power outages and maintain system operation for at least 10ms to meet the DYING GASP signal reporting requirements.
7. The power failure DYING GASP reporting delay circuit according to claim 1, characterized in that, The switching switch is a magnetic latching relay, whose coil drive end is connected to the output end of the voltage detection module. When the power-off trigger signal is low, the relay switches to the power supply state of the energy storage capacitor C2.
8. An electronic product, characterized in that, The electronic product is provided with a power failure DYING GASP reporting delay circuit as described in any one of claims 1-7.