Functional circuit compatible with POE power supply and adapter DC power supply

Abstract

The utility model relates to the field of optical network unit power supply, and provides a functional circuit compatible with POE power supply and adapter DC power supply, which comprises an input voltage detection circuit, a voltage regulation circuit, a voltage division circuit, an electric energy storage circuit and an MOSFET switching circuit. The input voltage detection circuit is electrically connected with the voltage regulation circuit, the voltage division circuit and the MOSFET switching circuit and is used for detecting the type of input voltage; the voltage regulating circuit is electrically connected with the MOSFET switching circuit and is used for regulating the grid voltage of the MOSFET; the voltage division circuit is electrically connected with the electric energy storage circuit and the MOSFET switching circuit and is used for dividing the reference voltage; the electric energy storage circuit is electrically connected with the voltage division circuit and is used for storing electric energy; and the MOSFET switching circuit is electrically connected with the input voltage detection circuit, the voltage regulation circuit and the voltage division circuit, and is used for switching the switching state of the MOSFET. Through the input voltage detection circuit, the voltage regulation circuit, the voltage division circuit, the energy storage circuit and the MOSFET switching circuit, the compatibility of the optical network unit to POE and DC power supply is realized, the stability of the optical network unit under different power supply conditions is ensured, the optical network unit has a dying gasp function to protect key data, and an alternative power supply scheme is provided when POE power supply equipment fails.

Description

Technical Field

[0001] The utility model relates to the field of power supply for optical network units, in particular to a functional circuit compatible with POE power supply and adapter DC power supply. Background Art

[0002] The optical network unit is a network terminal device, and the stability and reliability of the power supply must be guaranteed. In different application scenarios, the power supply method used for the optical network unit is also different. For optical network units with relatively high power consumption, such as optical network units with additional functions such as wireless AP and video surveillance, and scenarios with difficult wiring, such as the renovation of old communities, POE power supply can be used, and the power supply is centrally managed to provide higher power supply power; for optical network units with lower power consumption, such as basic broadband access optical network units, adapter DC power supply can be used, which is cost-effective and relatively simple to install and debug. However, at present, if you want to achieve two power supplies at the same time, you need to use multiple circuit designs, which are not compatible.

[0003] The Chinese patent with publication number CN115766301A discloses an optical network unit and POE power supply system, which supplies power to the optical network unit through a POE power supply device. However, when the POE power supply device of the system fails, there is no alternative power supply unit, and other external power sources may be required, which cannot guarantee the cost and efficiency, and the compatibility issue must also be considered. Utility Model Content

[0004] In view of this, the utility model proposes a functional circuit compatible with POE power supply and adapter DC power supply, and realizes the compatibility of the optical network unit with POE 54V and DC 12V power supply through an input voltage detection circuit, a voltage regulation circuit, a voltage divider circuit, an energy storage circuit and a MOSFET switch circuit, thereby ensuring the stability of the optical network unit under different power supply conditions, and having a dying gasp function to protect key data, thereby solving the problem of incompatible power supply modes in the prior art and providing an alternative power supply solution when the POE power supply equipment fails.

[0005] The technical solution of the utility model is implemented as follows: a functional circuit compatible with POE power supply and adapter DC power supply, including an input voltage detection circuit, a voltage regulation circuit, a voltage dividing circuit, an energy storage circuit and a MOSFET switch circuit;

[0006] The input voltage detection circuit is electrically connected to the voltage regulation circuit, the voltage divider circuit and the MOSFET switch circuit respectively, and is used to detect the input voltage type;

[0007] The voltage regulating circuit is electrically connected to the MOSFET switch circuit and is used to adjust the gate voltage of the MOSFET tube;

[0008] The voltage divider circuit is electrically connected to the electric energy storage circuit and the MOSFET switch circuit respectively, and is used to divide the reference voltage;

[0009] The electric energy storage circuit is electrically connected to the voltage divider circuit and is used to store electric energy;

[0010] The MOSFET switch circuit is electrically connected to the input voltage detection circuit, the voltage regulation circuit and the voltage divider circuit, and is used to switch the switch state of the MOSFET tube.

[0011] On the basis of the above technical solution, preferably, the input voltage detection circuit includes a capacitor C1, a capacitor C2, a resistor R1, and a resistor R3;

[0012] The positive electrode of the capacitor C1, the positive electrode of the capacitor C2, one end of the resistor R3 and one end of the resistor R1 are all connected to the Input input voltage, and the negative electrode of the capacitor C1 and the negative electrode of the capacitor C2 are both grounded.

[0013] On the basis of the above technical solution, preferably, the voltage regulating circuit includes a Zener diode D1, a resistor R5, a resistor R6, and a resistor R8;

[0014] The cathode of the Zener diode D1 is electrically connected to the other end of the resistor R3, the anode of the Zener diode D1 is electrically connected to one end of the resistor R5, the other end of the resistor R5 is electrically connected to one end of the resistor R6 and one end of the resistor R8 respectively, and the other end of the resistor R8 is grounded.

[0015] On the basis of the above technical solution, preferably, the voltage divider circuit includes a resistor R2, a resistor R4, and a resistor R7;

[0016] One end of the resistor R2 is electrically connected to the other end of the resistor R1 , the other end of the resistor R2 is electrically connected to one end of the resistor R4 , the other end of the resistor R4 is electrically connected to one end of the resistor R7 , and the other end of the resistor R7 is grounded.

[0017] On the basis of the above technical solution, preferably, the electric energy storage circuit includes a capacitor C3;

[0018] One end of the capacitor C3 is grounded, the other end of the capacitor C3 is electrically connected to the other end of the resistor R2 and one end of the resistor R4 respectively, and the other end of the capacitor C3 is input with a VREF reference voltage.

[0019] On the basis of the above technical solution, preferably, the MOSFET switch circuit includes a MOSFET tube Q1;

[0020] The gate of the MOSFET tube Q1 is electrically connected to the other end of the resistor R6, the source of the MOSFET tube Q1 is electrically connected to the other end of the resistor R4 and one end of the resistor R7 respectively, and the drain of the MOSFET tube Q1 is grounded.

[0021] On the basis of the above technical solution, preferably, the other end of the capacitor C3 is electrically connected to the Dying Gasp pin of the CPU for recording abnormal power supply events.

[0022] On the basis of the above technical solution, preferably, the Zener diode adopts a voltage regulator diode with model BZT52C20.

[0023] On the basis of the above technical solution, preferably, the MOSFET tube Q1 adopts an N-channel field effect tube of model AO3400A.

[0024] On the basis of the above technical solution, preferably, the Input voltage includes POE54V and DC12V.

[0025] The utility model provides a functional circuit compatible with POE power supply and adapter DC power supply, which has the following beneficial effects compared with the prior art:

[0026] (1) Through the input voltage detection circuit, voltage regulation circuit, voltage divider circuit, energy storage circuit and MOSFET switch circuit, the compatibility of the optical network unit with POE and DC power supply is achieved, ensuring the stability of the optical network unit under different power supply conditions, and having a dying gasp function to protect key data, providing an alternative power supply solution when the POE power supply equipment fails;

[0027] (2) The input voltage detection circuit uses a simple capacitor and resistor combination to achieve effective identification and isolation of POE and DC input voltages, providing a basis for the compatibility of functional circuits;

[0028] (3) The gate voltage of the MOSFET is adjusted by using a Zener diode and a resistor voltage divider through a voltage regulation circuit to ensure stable operation of the MOSFET under different power supply conditions, which reflects good voltage regulation and protection capabilities;

[0029] (4) By using the automatic switching mechanism of MOSFET tube Q1 through the MOSFET switching circuit, seamless switching between POE and DC power supply modes is achieved, with good voltage isolation and power consumption optimization characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a structural diagram of a functional circuit compatible with POE power supply and adapter DC power supply of the utility model;

[0032] Figure 2 This is a wiring diagram of a functional circuit compatible with POE power supply and adapter DC power supply of the utility model;

[0033] Figure 3 It is the wiring diagram of the input voltage detection circuit of the utility model;

[0034] Figure 4 It is the wiring diagram of the voltage regulating circuit of the utility model;

[0035] Figure 5 It is the wiring diagram of the voltage divider circuit of the utility model;

[0036] Figure 6 It is a wiring diagram of the electric energy storage circuit of the utility model;

[0037] Figure 7 It is the wiring diagram of the MOSFET switch circuit of the utility model. DETAILED DESCRIPTION

[0038] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figure 1-2 , this embodiment provides a functional circuit compatible with POE power supply and adapter DC power supply, including an input voltage detection circuit 1, a voltage regulation circuit 2, a voltage divider circuit 3, an energy storage circuit 4 and a MOSFET switch circuit 5;

[0040] The input voltage detection circuit 1 is electrically connected to the voltage regulation circuit 2, the voltage divider circuit 3 and the MOSFET switch circuit 5 respectively, and is used to detect the input voltage type;

[0041] The voltage regulating circuit 2 is electrically connected to the MOSFET switch circuit 5 and is used to adjust the gate voltage of the MOSFET tube;

[0042] The voltage divider circuit 3 is electrically connected to the energy storage circuit 4 and the MOSFET switch circuit 5 respectively, and is used to divide the reference voltage;

[0043] The electric energy storage circuit 4 is electrically connected to the voltage divider circuit 3 and is used to store electric energy;

[0044] The MOSFET switch circuit 5 is electrically connected to the input voltage detection circuit 1 , the voltage regulation circuit 2 and the voltage divider circuit 3 , and is used to switch the switch state of the MOSFET tube.

[0045] Specifically, the functional circuit of this embodiment achieves important technical effects such as compatibility with POE and DC power supply modes, ensuring stable operation of the equipment under different power supply conditions, and having abnormal power supply protection through the coordinated work of multiple sub-circuits such as input voltage detection, voltage regulation, voltage division, energy storage and MOSFET switching, thereby improving the flexibility and reliability of power supply.

[0046] Through the input voltage detection circuit, voltage regulation circuit, voltage divider circuit, energy storage circuit and MOSFET switch circuit, the compatibility of the optical network unit with POE 54V and DC 12V power supply is achieved, ensuring the stability of the optical network unit under different power supply conditions. It also has a dying gasp function to protect key data, solves the problem of incompatible power supply methods in the existing technology, and provides an alternative power supply solution when the POE power supply equipment fails.

[0047] like Figure 3 As shown, the input voltage detection circuit 1 includes a capacitor C1, a capacitor C2, a resistor R1, and a resistor R3;

[0048] The positive electrode of the capacitor C1, the positive electrode of the capacitor C2, one end of the resistor R3 and one end of the resistor R1 are all connected to the Input input voltage, and the negative electrode of the capacitor C1 and the negative electrode of the capacitor C2 are both grounded.

[0049] The input voltage includes POE54V and DC12V.

[0050] Specifically, the input voltage detection circuit 1 of this embodiment detects and distinguishes whether the input voltage is POE 54V or DC 12V through capacitors C1, C2, resistors R1, and R3. When the input voltage is POE 54V, the charge and discharge characteristics of capacitors C1 and C2 will be different from when the input is DC 12V, so the type of input voltage can be determined.

[0051] The series connection of capacitors C1 and C2 can isolate the input voltage from the subsequent circuit to prevent the high voltage POE voltage from damaging the subsequent circuit. At the same time, the negative electrodes of capacitors C1 and C2 are grounded, which can also play a role in voltage isolation and protection.

[0052] The input voltage detection circuit 1 is compatible with two different input voltages, POE 54V and DC 12V, to meet the needs of different application scenarios. By detecting the input voltage type, the subsequent voltage regulation circuit 2 and voltage divider circuit 3 are adjusted to achieve seamless switching between the two power supply modes.

[0053] The input voltage detection circuit 1 of this embodiment realizes effective identification and isolation of POE and DC input voltages through a simple combination of capacitors and resistors, provides a basis for the compatibility of the functional circuit, and is the key to the functional circuit to achieve switching between two power supply modes.

[0054] like Figure 4 As shown, the voltage regulating circuit 2 includes a Zener diode D1, a resistor R5, a resistor R6, and a resistor R8;

[0055] The cathode of the Zener diode D1 is electrically connected to the other end of the resistor R3, the anode of the Zener diode D1 is electrically connected to one end of the resistor R5, the other end of the resistor R5 is electrically connected to one end of the resistor R6 and one end of the resistor R8 respectively, and the other end of the resistor R8 is grounded.

[0056] The Zener diode is a voltage regulator diode of model BZT52C20.

[0057] Specifically, the voltage regulating circuit 2 of this embodiment uses a Zener diode D1 as a voltage stabilizing element to adjust the input voltage to a stable reference voltage. Through the voltage divider circuit of the Zener diode D1, the resistor R5, the resistor R6 and the resistor R8, the gate voltage of the MOSFET tube Q1 can be adjusted to control its switching state.

[0058] Zener diode D1 has a voltage stabilization function, which can prevent the input voltage from being too high and causing damage to other circuits. Even if the input voltage fluctuates, Zener diode D1 can maintain a stable reference voltage and improve the circuit's anti-interference ability.

[0059] The voltage regulation circuit can adapt to two different input voltages: POE 54V and DC 12V. The gate voltage of the MOSFET tube is adjusted by the Zener diode D1 to achieve compatibility with the two power supply modes. The BZT52C20 Zener diode is used to meet the voltage regulation requirements under different input voltages.

[0060] The voltage regulation circuit 2 of this embodiment can effectively regulate the gate voltage of the MOSFET tube by means of Zener diode and resistor voltage division, ensuring its stable operation under different power supply conditions, and embodies good voltage regulation and protection capabilities.

[0061] like Figure 5 As shown, the voltage divider circuit 3 includes a resistor R2, a resistor R4, and a resistor R7;

[0062] One end of the resistor R2 is electrically connected to the other end of the resistor R1 , the other end of the resistor R2 is electrically connected to one end of the resistor R4 , the other end of the resistor R4 is electrically connected to one end of the resistor R7 , and the other end of the resistor R7 is grounded.

[0063] Specifically, the voltage divider circuit 3 of this embodiment generates a stable reference voltage VREF from the input voltage through the voltage divider circuit of resistors R2, R4 and R7. VREF serves as a voltage reference for subsequent circuits and provides the required voltage reference for the energy storage circuit 4 and the MOSFET switch circuit 5.

[0064] The voltage divider circuit 3 of this embodiment generates a stable reference voltage VREF from the input voltage by a simple resistor voltage divider, which provides a voltage reference for the normal operation of the energy storage circuit 4 and the MOSFET switch circuit 5, and embodies good voltage isolation and power consumption optimization characteristics.

[0065] like Figure 6 As shown, the electric energy storage circuit 4 includes a capacitor C3;

[0066] One end of the capacitor C3 is grounded, the other end of the capacitor C3 is electrically connected to the other end of the resistor R2 and one end of the resistor R4 respectively, and the other end of the capacitor C3 is input with a VREF reference voltage.

[0067] The other end of the capacitor C3 is electrically connected to the Dying Gasp pin of the CPU for recording abnormal power supply events.

[0068] Specifically, capacitor C3 is used as an energy storage element, which can store electric energy during normal power supply and provide a short-term backup power supply.

[0069] When the input voltage is abnormal or interrupted, the energy stored in capacitor C3 can be temporarily supplied to the subsequent circuit. This power supply protection mechanism can ensure that the circuit can work normally for a period of time when the power supply fails and trigger the DyingGasp function.

[0070] The other end of capacitor C3 is connected to the Dying Gasp pin of the CPU, which can send a signal to the CPU when the power supply is abnormal and record the power supply failure event, which is helpful for subsequent fault analysis and system maintenance.

[0071] The electric energy storage circuit 4 of this embodiment realizes short-term power supply protection and fault monitoring in the event of power supply abnormality through the electric energy storage and Dying Gasp event recording functions of the capacitor C3, thereby improving the reliability of the entire circuit.

[0072] like Figure 7 As shown, the MOSFET switch circuit 5 includes a MOSFET tube Q1;

[0073] The gate of the MOSFET tube Q1 is electrically connected to the other end of the resistor R6, the source of the MOSFET tube Q1 is electrically connected to the other end of the resistor R4 and one end of the resistor R7 respectively, and the drain of the MOSFET tube Q1 is grounded.

[0074] The MOSFET tube Q1 is an N-channel field effect tube of model AO3400A.

[0075] Specifically, the MOSFET tube Q1, as a switching element, can automatically switch the working state according to the type of input voltage (POE54V or DC12V). When the input is POE54V, Q1 is in the on state; when the input is DC12V, Q1 is in the off state.

[0076] The drain of the MOSFET tube Q1 is grounded, which can isolate the input voltage from the subsequent circuit and prevent the high-voltage POE voltage from damaging the subsequent circuit.

[0077] When the input is DC12V, Q1 is in the cut-off state, which can greatly reduce the power consumption of the circuit and improve energy utilization efficiency.

[0078] The AO3400A N-channel field effect transistor has good switching characteristics and voltage resistance, and can meet the requirements of reliable operation under different power supply conditions.

[0079] The MOSFET switch circuit 5 of this embodiment realizes seamless switching between POE and DC power supply modes through the automatic switching mechanism of the MOSFET tube Q1, and has good voltage isolation and power consumption optimization characteristics.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A functional circuit compatible with POE power supply and adapter DC power supply, characterized in that: It comprises an input voltage detection circuit (1), a voltage regulation circuit (2), a voltage dividing circuit (3), an electric energy storage circuit (4) and a MOSFET switch circuit (5); The input voltage detection circuit (1) is electrically connected to the voltage regulation circuit (2), the voltage divider circuit (3) and the MOSFET switch circuit (5) respectively, and is used to detect the input voltage type; The voltage regulating circuit (2) is electrically connected to the MOSFET switch circuit (5) and is used to regulate the gate voltage of the MOSFET tube; The voltage divider circuit (3) is electrically connected to the electric energy storage circuit (4) and the MOSFET switch circuit (5) respectively, and is used to divide the reference voltage; The electric energy storage circuit (4) is electrically connected to the voltage divider circuit (3) and is used to store electric energy; The MOSFET switch circuit (5) is electrically connected to the input voltage detection circuit (1), the voltage regulation circuit (2) and the voltage divider circuit (3), and is used to switch the switch state of the MOSFET tube.

2. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 1, characterized in that: The input voltage detection circuit (1) comprises a capacitor C1, a capacitor C2, a resistor R1, and a resistor R3; The positive electrode of the capacitor C1, the positive electrode of the capacitor C2, one end of the resistor R3 and one end of the resistor R1 are all connected to the Input input voltage, and the negative electrode of the capacitor C1 and the negative electrode of the capacitor C2 are both grounded.

3. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 2, characterized in that: The voltage regulating circuit (2) comprises a Zener diode D1, a resistor R5, a resistor R6, and a resistor R8; The cathode of the Zener diode D1 is electrically connected to the other end of the resistor R3, the anode of the Zener diode D1 is electrically connected to one end of the resistor R5, the other end of the resistor R5 is electrically connected to one end of the resistor R6 and one end of the resistor R8 respectively, and the other end of the resistor R8 is grounded.

4. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 3, characterized in that: The voltage divider circuit (3) comprises a resistor R2, a resistor R4, and a resistor R7; One end of the resistor R2 is electrically connected to the other end of the resistor R1 , the other end of the resistor R2 is electrically connected to one end of the resistor R4 , the other end of the resistor R4 is electrically connected to one end of the resistor R7 , and the other end of the resistor R7 is grounded.

5. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 4, characterized in that: The electric energy storage circuit (4) comprises a capacitor C3; One end of the capacitor C3 is grounded, the other end of the capacitor C3 is electrically connected to the other end of the resistor R2 and one end of the resistor R4 respectively, and the other end of the capacitor C3 is input with a VREF reference voltage.

6. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 5, characterized in that: The MOSFET switch circuit (5) comprises a MOSFET tube Q1; The gate of the MOSFET tube Q1 is electrically connected to the other end of the resistor R6, the source of the MOSFET tube Q1 is electrically connected to the other end of the resistor R4 and one end of the resistor R7 respectively, and the drain of the MOSFET tube Q1 is grounded.

7. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 6, characterized in that: The other end of the capacitor C3 is electrically connected to the Dying Gasp pin of the CPU for recording abnormal power supply events.

8. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 7, characterized in that: The Zener diode is a voltage regulator diode of model BZT52C20.

9. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 8, characterized in that: The MOSFET tube Q1 is an N-channel field effect tube of model AO3400A.

10. A functional circuit compatible with POE power supply and adapter DC power supply as claimed in claim 9, characterized in that: The input voltage includes POE54V and DC12V.

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