Power fail hold circuit and fttr device

Abstract

The utility model discloses a kind of power-off maintaining circuit and FTTR equipment, including power supply circuit according to power connection end, provide first power supply signal to isolation diode;Isolation diode reverse isolation power supply circuit and energy storage capacitor circuit, and reverse isolation power supply circuit and load connection end;The first end of energy storage capacitor circuit is connected with load connection end, the second end of energy storage capacitor circuit is connected with ground terminal, for when power supply circuit normal power supply, according to first power supply signal charging;When power supply circuit stops power supply, provide second power supply signal to load connection end;The first end of bleeder resistor circuit is connected with the connecting node between power supply circuit and isolation diode, the second end of bleeder resistor circuit is connected with ground terminal, for when power supply circuit stops power supply, the electric energy of connecting node is discharged to ground terminal.This technical solution can be powered off when power connection end, FTTR equipment relies on the energy stored by energy storage capacitor circuit normal shutdown.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a power failure maintenance circuit and an FTTR device. Background Technology

[0002] FTTR (Fiber to the Room) equipment, as a core node in high-speed home networks, requires stable operation 24 / 7. Its motherboard contains power-sensitive components such as optical modules, CPUs, and RF units. In practical applications, frequent unexpected power outages or power plugging / unplugging can easily lead to data loss, corrupted system logs, and even hardware failures in FTTR equipment, impacting user experience and increasing maintenance costs. Therefore, there is an urgent need for a power protection solution that can effectively handle power anomalies and ensure graceful shutdown of the equipment. Utility Model Content

[0003] This utility model provides a power-down sustaining circuit and an FTTR device to solve the problem that frequent unexpected power outages or power plugging / unplugging can easily lead to data loss, corrupted system logs, or even hardware failure in the FTTR device.

[0004] A power-down sustaining circuit includes a power supply circuit, a bleeder circuit, an isolation diode, and an energy storage capacitor circuit; The power supply circuit is used to connect the power supply connection terminal and is connected to the anode of the isolation diode, and is used to provide a first power supply signal to the isolation diode according to the power supply connection terminal; The cathode of the isolation diode is connected to the first terminal and the load connection terminal of the energy storage capacitor circuit, and is used to reverse isolate the power supply circuit and the energy storage capacitor circuit, as well as to reverse isolate the power supply circuit and the load connection terminal. The first end of the energy storage capacitor circuit is connected to the load connection terminal, and the second end of the energy storage capacitor circuit is connected to the ground terminal. It is used to charge the capacitor according to the first power supply signal when the power supply circuit is supplying power normally, and to provide a second power supply signal to the load connection terminal when the power supply circuit stops supplying power. The first end of the bleeder resistor circuit is connected to the connection node between the power supply circuit and the isolation diode, and the second end of the bleeder resistor circuit is connected to the ground terminal, which is used to bleed the electrical energy of the connection node to the ground terminal when the power supply circuit stops supplying power.

[0005] Furthermore, the power supply circuit includes a switching circuit; The switching circuit is connected in series between the power supply circuit and the anode of the isolation diode, and is used to control the power supply circuit to supply power normally in the first switching state; and to control the power supply circuit to stop supplying power in the second switching state.

[0006] Furthermore, the switching circuit includes a manually controlled switch.

[0007] Furthermore, the power supply circuit also includes an input protection circuit; the first terminal of the input protection circuit is connected to the power connection terminal and the manual control switch, and the second terminal of the input protection circuit is grounded, for suppressing surge signals and interference signals generated by the power connection terminal.

[0008] Furthermore, the input protection circuit includes a transient suppression diode and a first capacitor; The cathode of the transient suppression diode is connected to the power supply terminal and the manual control switch, and the anode of the transient suppression diode is connected to the ground terminal. The first end of the first capacitor is connected to the power supply terminal and the manual control switch, and the second end of the first capacitor is connected to the ground terminal.

[0009] Furthermore, the energy storage capacitor circuit includes at least two electrolytic capacitors; the at least two electrolytic capacitors are connected in parallel.

[0010] Furthermore, the electrolytic capacitor is an aluminum electrolytic capacitor.

[0011] Furthermore, the power-down sustaining circuit also includes a second capacitor; the first terminal of the second capacitor is connected to the cathode of the isolation diode and the first terminal of the energy storage capacitor circuit, and the second capacitor is connected to the ground terminal.

[0012] An FTTR device includes the aforementioned power-down sustaining circuit.

[0013] This utility model provides a power-down sustaining circuit and an FTTR device. The power-down sustaining circuit includes a power supply circuit, a bleeder resistor circuit, an isolation diode, and an energy storage capacitor circuit. The power supply circuit provides a first power supply signal to the isolation diode based on the power connection terminal to ensure power supply reliability. The isolation diode reverse-isolates the power supply circuit and the energy storage capacitor circuit, as well as the load connection terminal, preventing reverse connection of the load terminal from causing safety hazards. It also prevents the energy stored in the energy storage capacitor circuit from flowing to the power supply circuit when the power connection terminal loses power. Therefore, all the energy stored in the energy storage capacitor circuit flows to the load connection terminal, ensuring that the FTTR device relies on energy storage when the power connection terminal loses power. The energy stored in the capacitor circuit during normal shutdown is charged by the energy storage capacitor circuit according to the first power supply signal when the power supply circuit is supplying power normally. When the power supply circuit stops supplying power, a second power supply signal is provided to the load connection terminal to maintain power supply to the load connection terminal when the power supply connection terminal loses power. The first end of the bleed resistor circuit is connected to the connection node between the power supply circuit and the isolation diode, and the second end of the bleed resistor circuit is connected to the ground terminal. This is used to bleed the electrical energy of the connection node to the ground terminal when the power supply circuit stops supplying power, so as to enhance the isolation shutdown effect and response speed. At the same time, when the power supply circuit is supplying power normally, it provides a minimum load to the power supply circuit, which helps to enhance the power supply stability under no-load or light-load conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a power-down sustaining circuit in one embodiment of the present invention.

[0016] In the diagram: 1. Power supply circuit; 11. Switching circuit; 12. Input protection circuit; 2. Bleeding resistor circuit; 3. Isolation diode; 4. Energy storage capacitor circuit. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0018] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art.

[0019] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0020] This embodiment provides a power-down sustaining circuit, such as... Figure 1 As shown, the circuit includes a power supply circuit 1, a bleeder resistor circuit 2, an isolation diode 3, and an energy storage capacitor circuit 4. The power supply circuit 1 is connected to the DC power supply terminal and the anode of the isolation diode 3, providing a first power supply signal to the isolation diode 3 based on the DC power supply terminal. The cathode of the isolation diode 3 is connected to the first terminal of the energy storage capacitor circuit 4 and the 12V load terminal, providing reverse isolation between the power supply circuit 1 and the energy storage capacitor circuit 4, as well as between the power supply circuit 1 and the 12V load terminal. The first terminal of the energy storage capacitor circuit 4 is connected to the 12V load terminal, and the second terminal is connected to the ground terminal, charging the capacitor according to the first power supply signal when the power supply circuit 1 is supplying power normally, and providing a second power supply signal to the 12V load terminal when the power supply circuit 1 stops supplying power. The first terminal of the bleeder resistor circuit 2 is connected to the connection node between the power supply circuit 1 and the isolation diode 3, and the second terminal is connected to the ground terminal, discharging the energy from the connection node to the ground terminal when the power supply circuit 1 stops supplying power.

[0021] As an example, this power failure sustainment circuit is used in an FTTR device, where the DC power connection terminal is used to connect to an external power grid and / or an energy storage battery in the FTTR device to provide a first power supply signal through the external power grid or the energy storage battery.

[0022] As an example, power supply circuit 1 is connected to the power supply terminal DC and is connected to the anode of isolation diode 3. It provides a first power supply signal to isolation diode 3 based on the power supply terminal DC. In this example, power supply circuit 1 performs surge suppression, interference signal suppression, and power on / off control on the first power supply signal provided by the power supply terminal DC to ensure power supply reliability and flexibility.

[0023] As an example, the 12V load connection terminal is used to connect to the main control board in the FTTR equipment, supplying power to the optical module, CPU, RF unit, storage unit, etc. on the main control board. The cathode of the isolation diode 3 is connected to the first terminal of the energy storage capacitor circuit 4 and the 12V load connection terminal, used to reverse isolate the power supply circuit 1 and the energy storage capacitor circuit 4, as well as the reverse isolation between the power supply circuit 1 and the 12V load connection terminal. This is to prevent the 12V load connection terminal from being reverse-connected, thus preventing the energy stored in the energy storage capacitor circuit 4 from flowing to the power supply circuit 1 when the DC power connection terminal fails. This ensures that all the energy stored in the energy storage capacitor circuit 4 flows to the 12V load connection terminal, so that the main control board in the FTTR equipment can shut down normally by relying on the energy stored in the energy storage capacitor circuit 4 when the DC power connection terminal fails.

[0024] As an example, the first end of the energy storage capacitor circuit 4 is connected to the load connection terminal 12V, and the second end of the energy storage capacitor circuit 4 is connected to the ground terminal. It is used to charge the capacitor according to the first power supply signal when the power supply circuit 1 is supplying power normally; and to provide a second power supply signal to the load connection terminal 12V when the power supply circuit 1 stops supplying power, so as to maintain the power supply of the load connection terminal 12V when the DC power supply terminal fails.

[0025] As an example, the first end of the bleeder resistor circuit 2 is connected to the connection node between the power supply circuit 1 and the isolation diode 3, and the second end of the bleeder resistor circuit 2 is connected to the ground terminal. This is used to discharge the electrical energy of the connection node to the ground terminal when the power supply circuit 1 stops supplying power, providing a fast discharge path to ground. This allows for rapid discharge of residual charge on the connection node between the power supply circuit 1 and the isolation diode 3, ensuring that the anode potential of the isolation diode 3 quickly returns to zero, thus enabling it to enter the reverse cutoff state more quickly and reliably, enhancing the isolation turn-off effect and response speed. Simultaneously, when the power supply circuit 1 is supplying power normally, it provides a minimum load to the power supply circuit 1, helping to enhance power supply stability under no-load or light-load conditions. Exemplarily, the bleeder resistor circuit 2 may include a single resistor R1, or multiple resistors R1, which may be connected in series and / or parallel. Figure 1 As shown, the bleeder circuit 2 may include a single resistor R1.

[0026] In this embodiment, the power-down sustaining circuit includes a power supply circuit 1, a bleeder resistor circuit 2, an isolation diode 3, and an energy storage capacitor circuit 4. The power supply circuit 1 provides a first power supply signal to the isolation diode 3 based on the DC power supply connection, ensuring power supply reliability. The isolation diode 3 reverse-isolates the power supply circuit 1 and the energy storage capacitor circuit 4, as well as the load connection 12V, preventing reverse connection of the load connection 12V from causing safety hazards. It also prevents the energy stored in the energy storage capacitor circuit 4 from flowing to the power supply circuit 1 when the DC power supply connection fails. This ensures that all the energy stored in the energy storage capacitor circuit 4 flows to the load connection 12V, guaranteeing that the FTTR device relies on the energy storage capacitor circuit 4 when the DC power supply connection fails. When the stored energy is powered off normally, it is charged by the energy storage capacitor circuit 4 according to the first power supply signal when the power supply circuit 1 is powered normally. When the power supply circuit 1 stops supplying power, a second power supply signal is provided to the 12V load connection terminal to maintain the 12V power supply to the load connection terminal when the DC power supply terminal fails. The first end of the bleed resistor circuit 2 is connected to the connection node between the power supply circuit 1 and the isolation diode 3, and the second end of the bleed resistor circuit 2 is connected to the ground terminal. This is used to bleed the electrical energy of the connection node to the ground terminal when the power supply circuit 1 stops supplying power, so as to enhance the isolation shutdown effect and response speed. At the same time, when the power supply circuit 1 is powered normally, it provides a minimum load for the power supply circuit 1, which helps to enhance the power supply stability under no-load or light-load conditions.

[0027] In one embodiment, the power supply circuit 1 includes a switching circuit 11; the switching circuit 11 is connected in series between the power supply circuit 1 and the anode of the isolation diode 3, and is used to control the power supply circuit 1 to supply power normally in a first switching state; and to control the power supply circuit 1 to stop supplying power in a second switching state.

[0028] In this embodiment, when the DC power supply at the power connection terminal is normally powered, the power supply circuit 1 can also be controlled to supply power normally or to stop supplying power through the switching circuit 11, so as to improve the power supply flexibility. At the same time, through the isolation diode 3, the bleeder resistor circuit 2 and the energy storage capacitor circuit 4, the FTTR equipment can also be guaranteed to shut down normally when actively powered off.

[0029] In one embodiment, the switching circuit 11 includes a manual control switch. In this embodiment, the power supply circuit 1 is controlled to supply power normally or stop supplying power via the manual control switch, which is low-cost and easy to operate.

[0030] In one embodiment, the power supply circuit 1 further includes an input protection circuit 12; the first terminal of the input protection circuit 12, the power supply connection terminal DC, is connected to the manual control switch, and the second terminal of the input protection circuit 12 is grounded, for suppressing surge signals and interference signals generated by the power supply connection terminal DC.

[0031] In this embodiment, the first terminal of the input protection circuit 12, the DC power connection terminal, is connected to the manual control switch, and the second terminal of the input protection circuit 12 is grounded. This is used to suppress surge signals and interference signals generated by the DC power connection terminal, thereby ensuring the safety and reliability of the power supply.

[0032] In one embodiment, the input protection circuit 12 includes a transient suppression diode D1 and a first capacitor C1; the cathode of the transient suppression diode D1 is connected to the power supply terminal DC and the manual control switch, and the anode of the transient suppression diode D1 is connected to the ground terminal; the first terminal of the first capacitor C1 is connected to the power supply terminal DC and the manual control switch, and the second terminal of the first capacitor C1 is connected to the ground terminal.

[0033] In this embodiment, the surge signal and interference signal generated by the DC power supply terminal are suppressed by the transient suppression diode D1 and the first capacitor C1. The circuit structure is simple and the cost is low.

[0034] In one embodiment, the energy storage capacitor circuit 4 includes at least two electrolytic capacitors; the at least two electrolytic capacitors are connected in parallel.

[0035] For example, such as Figure 1 As shown, the energy storage capacitor circuit 4 includes three 1000uF electrolytic capacitors C3, C4, and C5. When the external power is cut off and the isolation diode 3 is turned off, the energy storage capacitor circuit 4 becomes the only temporary power supply for the FTTR device. Since the discharge circuit of the energy storage capacitor circuit 4 has been isolated by the isolation diode 3, the energy cannot leak to the power supply circuit 1 and can only supply the 12V to the load connection terminal. This causes the second power supply signal to slowly decrease from 12V, forming a reliable power-down sustaining slope. When the three 1000uF electrolytic capacitors reduce the voltage from 12V to the minimum operating voltage, such as 10.5V, under a load current of 0.5A, the power-down sustaining time Δt can be calculated to be approximately 9ms according to Δt = (C * ΔV) / I, which is sufficient for the FTTR device to enter an emergency state to save data. In this embodiment, by setting at least two electrolytic capacitors in parallel, the total equivalent series resistance (ESR) is significantly reduced, ensuring that when the main control chip in the FTTR device starts the emergency data saving program and the power consumption increases at the moment of power failure, the energy storage capacitor circuit 4 can provide a sufficient and stable instantaneous current to prevent the shutdown program from failing due to voltage collapse.

[0036] In one embodiment, the electrolytic capacitor is an aluminum electrolytic capacitor. In this embodiment, the large capacitance and low cost of aluminum electrolytic capacitors are utilized to improve power-down retention and reduce costs.

[0037] In one embodiment, the power-down sustaining circuit further includes a second capacitor C2; the first terminal of the second capacitor C2 is connected to the cathode of the isolation diode 3 and the first terminal of the energy storage capacitor circuit 4, and the second capacitor C2 is connected to the ground terminal. In this embodiment, the first terminal of the second capacitor C2 is connected to the cathode of the isolation diode 3 and the first terminal of the energy storage capacitor circuit 4, and the second capacitor C2 is connected to the ground terminal to ensure the stability of the output voltage.

[0038] This embodiment provides an FTTR device, including the power-down sustaining circuit described above.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A power-down sustaining circuit, characterized in that, This includes power supply circuits, bleeder resistor circuits, isolation diodes, and energy storage capacitor circuits; The power supply circuit is used to connect the power supply connection terminal and is connected to the anode of the isolation diode, and is used to provide a first power supply signal to the isolation diode according to the power supply connection terminal; The cathode of the isolation diode is connected to the first terminal and the load connection terminal of the energy storage capacitor circuit, and is used to reverse isolate the power supply circuit and the energy storage capacitor circuit, as well as to reverse isolate the power supply circuit and the load connection terminal. The first end of the energy storage capacitor circuit is connected to the load connection terminal, and the second end of the energy storage capacitor circuit is connected to the ground terminal. It is used to charge the capacitor according to the first power supply signal when the power supply circuit is supplying power normally, and to provide a second power supply signal to the load connection terminal when the power supply circuit stops supplying power. The first end of the bleeder resistor circuit is connected to the connection node between the power supply circuit and the isolation diode, and the second end of the bleeder resistor circuit is connected to the ground terminal, which is used to bleed the electrical energy of the connection node to the ground terminal when the power supply circuit stops supplying power.

2. The power-down sustaining circuit according to claim 1, characterized in that, The power supply circuit includes a switching circuit; The switching circuit is connected in series between the power supply circuit and the anode of the isolation diode, and is used to control the power supply circuit to supply power normally in the first switching state; and to control the power supply circuit to stop supplying power in the second switching state.

3. The power-down sustaining circuit according to claim 2, characterized in that, The switching circuit includes a manually controlled switch.

4. The power-down sustaining circuit according to claim 3, characterized in that, The power supply circuit also includes an input protection circuit; the first terminal of the input protection circuit is connected to the power connection terminal and the manual control switch, and the second terminal of the input protection circuit is grounded to suppress surge signals and interference signals generated by the power connection terminal.

5. The power-down sustaining circuit according to claim 4, characterized in that, The input protection circuit includes a transient suppression diode and a first capacitor; The cathode of the transient suppression diode is connected to the power supply terminal and the manual control switch, and the anode of the transient suppression diode is connected to the ground terminal. The first end of the first capacitor is connected to the power supply terminal and the manual control switch, and the second end of the first capacitor is connected to the ground terminal.

6. The power-down sustaining circuit according to claim 1, characterized in that, The energy storage capacitor circuit includes at least two electrolytic capacitors; the at least two electrolytic capacitors are connected in parallel.

7. The power-down sustaining circuit according to claim 6, characterized in that, The electrolytic capacitor is an aluminum electrolytic capacitor.

8. The power-down sustaining circuit according to claim 1, characterized in that, The power-down sustaining circuit further includes a second capacitor; the first terminal of the second capacitor is connected to the cathode of the isolation diode and the first terminal of the energy storage capacitor circuit, and the second capacitor is connected to the ground terminal.

9. An FTTR device, characterized in that, Includes the power-down sustaining circuit as described in any one of claims 1 to 8.

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