Power supply circuit of domestic routing switch

Abstract

The utility model provides a domestic route switch power supply circuit, the route switch comprises a main controller, a processor and a switch chip, the data transmission end of the main controller is connected with the data transmission end of the processor, the control end of the main controller is connected with the control end of the processor, and the main controller is used for data transmission and control; the data transmission end of the processor is connected with the data transmission end of the exchange chip; the switching chip is connected with terminal equipment; according to the utility model, a multi-stage voltage reduction and modular design is adopted, so that the efficiency and the stability of power management are improved; the voltage reduction circuit is mainly composed of a first voltage reduction chip, a second voltage reduction chip, a third voltage reduction chip, a fourth voltage reduction chip, a fifth voltage reduction chip and a secondary voltage reduction chip,

Description

Technical Field

[0001] The utility model relates to the technical field of power supply circuits, in particular to a power supply circuit for a domestically produced routing switch. Background Art

[0002] The design of power supply circuits for domestically produced routing switches aims to improve power management efficiency and stability, but faces a series of technical challenges. First, the multi-stage step-down design with too many layers can lead to energy loss. Second, it is necessary to consider how to provide the voltage that best suits the performance requirements of each key component of the domestically produced routing switch. Finally, it is necessary to strike a balance between cost control and performance to reduce production costs and improve the system's cost-effectiveness. Utility Model Content

[0003] The utility model aims to at least solve the technical problems existing in the prior art, and in particular innovatively proposes a domestically produced routing switch power supply circuit.

[0004] To achieve the above-mentioned purpose of the present invention, the present invention provides a power supply circuit for a domestically produced routing switch, the routing switch comprising a main controller, a processor, and a switching chip, wherein the data transmission end of the main controller is connected to the data transmission end of the processor, and the control end of the main controller is connected to the control end of the processor for data transmission and control; the data transmission end of the processor is connected to the data transmission end of the switching chip; and the switching chip is connected to a terminal device;

[0005] The switch power supply circuit includes:

[0006] a first buck chip, a second buck chip, a third buck chip, a fourth buck chip, a fifth buck chip and a secondary buck chip;

[0007] The power output terminals of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip and the secondary buck chip are connected to the power input terminal of the main controller; the power input terminal of the secondary buck chip is connected to the power output terminals of the third buck chip and the fourth buck chip;

[0008] The power output terminals of the fourth step-down chip and the fifth step-down chip are connected to the power input terminal of the switching chip.

[0009] Preferably, the main controller is further connected to the memory and the eMMC memory;

[0010] The power input terminal of the memory is connected to the power output terminal of the third step-down chip;

[0011] The power input terminal of the eMMC memory is connected to the power output terminal of the fourth step-down chip.

[0012] Preferably, the data transmission ends of the eMMC memory are each connected to one end of a pull-up resistor through a respective connection line branch, and the other end of the pull-up resistor is commonly connected to the power supply VCCIO501, and the power supply VCCIO501 is obtained by passing the power supply 3.3V through the ferrite bead L18 or the resistor R196.

[0013] The data transmission end of the eMMC memory is connected to the power supply through a pull-up resistor. This connection method ensures that the data transmission line can remain in a certain level state provided by the power supply when it is not actively driven, thereby enhancing the stability and integrity of the signal.

[0014] Preferably, the power output end of the fourth step-down chip is also connected to the power input end of the power monitoring chip and the power input end of the MCU, and the reset signal end of the power monitoring chip is connected to the reset end of the eMMC memory.

[0015] When the power monitoring chip detects that the output voltage of the fourth step-down chip is abnormal, an interrupt signal is sent to the MCU, and the MCU controls the fourth step-down chip to stop working to ensure the safety of the system. The MCU includes a processor of the switch.

[0016] Preferably, the output power of the first buck chip is 1.05V, the output power of the second buck chip is 1.8V, the output power of the third buck chip is 1.5V, the output power of the fourth buck chip is 3.3V, and the output power of the fifth buck chip is 1.18V.

[0017] Preferably, the input power supply of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip and the fifth buck chip is VCC12V with a voltage value of 12V, the VCC12V is connected to the cathode of the voltage regulator diode VD4, the anode of the voltage regulator diode VD4 is connected to the cathode of the TVS diode VD3 and the first end of the fuse FU4, the second end of the fuse FU4 is connected to the external 12V power supply; the anode of the TVS diode VD3 is connected to the power ground.

[0018] TVS diodes are used for overvoltage protection, fuses are used for short circuit and overload protection, and Zener diodes are used to maintain output voltage stability.

[0019] Preferably, the circuit connections of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip, and the fifth buck chip all include:

[0020] The first end of capacitor C449, the first end of capacitor C458, the first end of capacitor C463, the first end of resistor R339, and the power input terminal VIN of the synchronous buck converter are connected to the power supply VCC12V, the enable terminal EN of the synchronous buck converter is connected to the second end of resistor R339 and the first end of resistor R340, the internal power supply terminal VCC of the synchronous buck converter is connected to the first end of capacitor C468, the mode selection terminal MODE of the synchronous buck converter is connected to the first end of resistor R349, the chip select terminal CS of the synchronous buck converter is connected to the first end of resistor R350, and the synchronous buck converter is connected to the first end of the resistor R350. The bootstrap power supply terminal BST is connected to the first end of resistor R358, the second end of resistor R358 is connected to the first end of capacitor C473, the second end of capacitor C473 is connected to the power switch terminals SW1 and SW2 of the synchronous buck converter, and the first end of inductor L21, the second end of inductor L21 outputs power, wherein inductor L21 serves as an energy storage inductor of the DCDC power supply and cooperates with the MOS transistor inside the DCDC chip to complete voltage conversion; the bootstrap power supply terminal BST is also connected to the first end of capacitor C483, the first end of resistor R380, the first end of capacitor C488, the first end of capacitor C493, and the first end of capacitor C498;

[0021] A second end of capacitor C483 is connected to a first end of resistor R137, a second end of resistor R137 is connected to a feedback terminal FB of the synchronous buck converter, a second end of resistor R380, and a first end of resistor R381, a status indication terminal PGOOD of the synchronous buck converter is connected to a first end of resistor R366, a second end of resistor R366 outputs a power supply VCC_VCC1V, a reference terminal REF of the synchronous buck converter is connected to a first end of capacitor C478, ground terminals AGND, PGND1, and PGND2 of the synchronous buck converter, a second end of capacitor C478, a second end of resistor R381, a second end of capacitor C488, a second end of capacitor C493, a second end of capacitor C498, a second end of capacitor C449, a second end of capacitor C458, a second end of capacitor C463, a second end of capacitor C468, a second end of resistor R340, a second end of resistor R349, and a second end of resistor R350 are connected to a power ground.

[0022] Preferably, the circuit connection of the fourth step-down chip further includes:

[0023] The second end of the inductor L21 is connected to the first end of the resistor R376 , the second end of the resistor R376 is connected to the anode of the light emitting diode HL6 , and the cathode of the light emitting diode HL6 is connected to the power ground.

[0024] The output power of the fourth step-down chip supplies power to multiple components of the routing switch, so it is a good idea to design a light-emitting diode (LED) to monitor the status of this power supply. This ensures that if there is a power problem, it can be quickly discovered through the LED indication, thus avoiding potential equipment failure.

[0025] Preferably, the model of the synchronous buck converter is IS6605A, the model of the main controller is the domestically produced FMQL45T900, and the model of the processor is the domestically produced GD32F427ZG.

[0026] Preferably, the circuit connection of the secondary buck chip includes:

[0027] The power supply terminal VCC of the linear regulator D12, the first terminal of the capacitor C420, the first terminal of the capacitor C423, and the first terminal of the capacitor C426 are connected to the power supply VCC3.3V.

[0028] The input voltage terminal VIN of the linear regulator D12, the first terminal of the capacitor C428, the first terminal of the capacitor C430, the first terminal of the capacitor C431, and the first terminal of the resistor R334 are connected to the power supply VCC1.5V.

[0029] The reference voltage terminal REF of the linear regulator D12 is connected to the second terminal of the resistor R334 and the first terminal of the resistor R335.

[0030] The termination voltage terminal VTT of the linear regulator D12 outputs the power supply PS_DDR3_VTT, where the current value of the power supply PS_DDR3_VTT is up to 2A; and is connected to the first end of the capacitor C436, the first end of the capacitor C439, the first end of the capacitor C442, and the first end of the capacitor C444;

[0031] The ground terminal of the linear regulator D12, the second end of the capacitor C420, the second end of the capacitor C423, the second end of the capacitor C426, the second end of the capacitor C428, the second end of the capacitor C430, the second end of the capacitor C431, the second end of the resistor R335, the second end of the capacitor C436, the second end of the capacitor C439, the second end of the capacitor C442, and the second end of the capacitor C444 are connected to the power ground.

[0032] In summary, thanks to the aforementioned technical solutions, this utility model employs a multi-stage voltage reduction and modular design, improving the efficiency and stability of power management. Primarily composed of first through fifth step-down chips and a secondary step-down chip, these step-down chips provide stable power input to key components such as the main controller, processor, and switch chip. Through precise voltage regulation, each component receives the voltage level that best suits its performance requirements, ensuring stable operation of the entire routing switch. Furthermore, this utility model offers the advantages of ease of expansion and maintenance, enabling flexible adaptation to diverse application scenarios and future technological developments.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 It is a structural diagram of the present utility model.

[0036] Figure 2 This is a circuit connection diagram of the five step-down chips of the utility model.

[0037] Figure 3 This is a circuit connection diagram of the secondary step-down chip of the utility model.

[0038] Figure 4 It is a circuit connection diagram of the memory of the utility model.

[0039] Figure 5 This is a circuit connection diagram of the eMMC memory of the utility model.

[0040] Figure 6 This is a circuit connection diagram of the MCU and power monitoring chip of the utility model.

[0041] Figure 7 It is a circuit connection diagram of the main controller of the utility model. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0043] This utility model proposes a domestic routing switch power supply circuit, such as Figure 1 As shown:

[0044] The routing switch includes a main controller, a processor, and a switching chip. The data transmission end of the main controller is connected to the data transmission end of the processor, and the control end of the main controller is connected to the control end of the processor for data transmission and control; the data transmission end of the processor is connected to the data transmission end of the switching chip; and the switching chip is connected to the terminal device.

[0045] The switch power supply circuit includes: a first step-down chip, a second step-down chip, a third step-down chip, a fourth step-down chip, a fifth step-down chip, and a secondary step-down chip; wherein the power output ends of the first step-down chip, the second step-down chip, the third step-down chip, the fourth step-down chip, and the secondary step-down chip are connected to the power input end of the main controller; the power input end of the secondary step-down chip is connected to the power output ends of the third step-down chip and the fourth step-down chip; and the power output ends of the fourth step-down chip and the fifth step-down chip are connected to the power input end of the switch chip.

[0046] In addition, there is a memory and an eMMC memory, the power input end of the memory is connected to the power output end of the third step-down chip; the power input end of the eMMC memory is connected to the power output end of the fourth step-down chip.

[0047] The circuit connection of the five step-down chips in this utility model is as follows Figure 2 As shown, it can be seen that the circuit connections of the first buck chip, the second buck chip, the third buck chip, and the fifth buck chip are the same. Take the circuit connection of the first buck chip as an example:

[0048] The first end of the capacitor C449, the first end of the capacitor C458, the first end of the capacitor C463, the first end of the resistor R339, and the power input terminal VIN of the synchronous buck converter U4 are connected to the power supply VCC12V, the enable terminal EN of the synchronous buck converter U4 is connected to the second end of the resistor R339 and the first end of the resistor R340, the internal power supply terminal VCC of the synchronous buck converter U4 is connected to the first end of the capacitor C468, the mode selection terminal MODE of the synchronous buck converter U4 is connected to the first end of the resistor R349, the chip select terminal CS of the synchronous buck converter U4 is connected to the first end of the resistor R350, and the synchronous buck converter U4 is connected to the first end of the resistor R350. The bootstrap power supply terminal BST of the converter U4 is connected to the first end of the resistor R358, the second end of the resistor R358 is connected to the first end of the capacitor C473, the second end of the capacitor C473 is connected to the power switch terminals SW1 and SW2 of the synchronous buck converter U4, and the first end of the inductor L21, the second end of the inductor L21 outputs power, wherein the inductor L21 serves as an energy storage inductor of the DCDC power supply and cooperates with the MOS transistor inside the DCDC chip to complete voltage conversion; and the inductor L21 is connected to the first end of the capacitor C483, the first end of the resistor R380, the first end of the capacitor C488, the first end of the capacitor C493, and the first end of the capacitor C498;

[0049] A second end of capacitor C483 is connected to a first end of resistor R137, a second end of resistor R137 is connected to a feedback end FB of the synchronous buck converter U4, a second end of resistor R380, and a first end of resistor R381, a status indication end PGOOD of the synchronous buck converter U4 is connected to a first end of resistor R366, a second end of resistor R366 outputs a power supply VCC_VCC1V, a reference end REF of the synchronous buck converter U4 is connected to a first end of capacitor C478, ground ends AGND, PGND1, and PGND2 of the synchronous buck converter U4, a second end of capacitor C478, a second end of resistor R381, a second end of capacitor C488, a second end of capacitor C493, a second end of capacitor C498, a second end of capacitor C449, a second end of capacitor C458, a second end of capacitor C463, a second end of capacitor C468, a second end of resistor R340, a second end of resistor R349, and a second end of resistor R350 are connected to a power ground.

[0050] The circuit connection of the fourth buck chip also includes: the second end of the inductor L21 is connected to the first end of the resistor R376, the second end of the resistor R376 is connected to the anode of the light emitting diode HL6, and the cathode of the light emitting diode HL6 is connected to the power ground.

[0051] The circuit connection of the secondary buck chip is as follows Figure 3 As shown:

[0052] The power supply terminal VCC of the linear regulator D12, the first terminal of the capacitor C420, the first terminal of the capacitor C423, and the first terminal of the capacitor C426 are connected to the power supply VCC3.3V.

[0053] The input voltage terminal VIN of the linear regulator D12, the first terminal of the capacitor C428, the first terminal of the capacitor C430, the first terminal of the capacitor C431, and the first terminal of the resistor R334 are connected to the power supply VCC1.5V.

[0054] The reference voltage terminal REF of the linear regulator D12 is connected to the second terminal of the resistor R334 and the first terminal of the resistor R335.

[0055] The termination voltage terminal VTT of the linear regulator D12 outputs the power supply PS_DDR3_VTT, where the current value of the power supply PS_DDR3_VTT is up to 2A; and is connected to the first end of the capacitor C436, the first end of the capacitor C439, the first end of the capacitor C442, and the first end of the capacitor C444;

[0056] The ground terminal of the linear regulator D12, the second end of the capacitor C420, the second end of the capacitor C423, the second end of the capacitor C426, the second end of the capacitor C428, the second end of the capacitor C430, the second end of the capacitor C431, the second end of the resistor R335, the second end of the capacitor C436, the second end of the capacitor C439, the second end of the capacitor C442, and the second end of the capacitor C444 are connected to the power ground.

[0057] Among them, the model of linear regulator D12 is SE9175.

[0058] The circuit connection of the memory is as follows Figure 4 The data transmission end of the memory is connected to the main controller, the reference voltage end of the memory is connected to the power supply VCC1.5V, and is connected to the first ends of several parallel capacitors, and the second ends of several parallel capacitors are connected to the power ground.

[0059] The circuit connection of eMMC memory is as follows Figure 5 As shown. The data transmission end of the eMMC memory is connected to the main controller and is also connected to the power supply VCCIO501. When connected to the power supply VCCIO501, a resistor is also connected in series. The reset end of the eMMC memory is connected to the reset signal end of the power monitoring chip;

[0060] A first power supply terminal VCC of the eMMC memory is connected to a power supply VCC3.3V, and further connected to first terminals of three parallel capacitors, wherein second terminals of the three parallel capacitors are connected to a power ground;

[0061] The second power supply terminal VCCQ of the eMMC memory is connected to the power supply VCCIO501. In addition, it is also connected to the first ends of three parallel capacitors, and the second ends of the three parallel capacitors are connected to the power ground; the power supply VCCIO501 is obtained by passing the power supply 3.3V through the ferrite bead L18 or the resistor R196.

[0062] Figure 6 This is a circuit connection diagram of the MCU and power monitoring chip of the utility model. It can be seen that the power supply voltage of MCU U6 and power monitoring chip D7 is the power supply VCC3.3V, and the power is provided by the output voltage of the fourth step-down chip.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A domestically produced routing switch power supply circuit, characterized in that: The routing switch includes a main controller, a processor and a switching chip. The data transmission end of the main controller is connected to the data transmission end of the processor, and the control end of the main controller is connected to the control end of the processor; the data transmission end of the processor is connected to the data transmission end of the switching chip; and the switching chip is connected to the terminal device. The switch power supply circuit includes: a first buck chip, a second buck chip, a third buck chip, a fourth buck chip, a fifth buck chip and a secondary buck chip; The power output terminals of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip and the secondary buck chip are connected to the power input terminal of the main controller; the power input terminal of the secondary buck chip is connected to the power output terminals of the third buck chip and the fourth buck chip; The power output terminals of the fourth step-down chip and the fifth step-down chip are connected to the power input terminal of the switching chip.

2. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: Also includes: The main controller is also connected to the memory and the eMMC memory; The power input terminal of the memory is connected to the power output terminal of the third step-down chip; The power input terminal of the eMMC memory is connected to the power output terminal of the fourth step-down chip.

3. The power supply circuit of a domestic routing switch according to claim 2, characterized in that: The data transmission ends of the eMMC memory are each connected to one end of a pull-up resistor through their own connection line branches, and the other end of the pull-up resistor is commonly connected to the power supply VCCIO501. The power supply VCCIO501 is obtained by passing the power supply 3.3V through the ferrite bead L18 or the resistor R196.

4. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: The power output terminal of the fourth step-down chip is also connected to the power input terminal of the power monitoring chip and the power input terminal of the MCU.

5. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: The output power of the first buck chip is 1.05V, the output power of the second buck chip is 1.8V, the output power of the third buck chip is 1.5V, the output power of the fourth buck chip is 3.3V, and the output power of the fifth buck chip is 1.18V.

6. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: The input power supply of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip, and the fifth buck chip is VCC12V with a voltage value of 12V. The VCC12V is connected to the cathode of the voltage regulator diode VD4, the anode of the voltage regulator diode VD4 is connected to the cathode of the TVS diode VD3 and the first end of the fuse FU4, and the second end of the fuse FU4 is connected to the external 12V power supply; the anode of the TVS diode VD3 is connected to the power ground.

7. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: The circuit connections of the first buck chip, the second buck chip, the third buck chip, the fourth buck chip, and the fifth buck chip all include: The first end of capacitor C449, the first end of capacitor C458, the first end of capacitor C463, the first end of resistor R339, the power input terminal VIN of the synchronous buck converter are connected to the power supply VCC12V, the enable terminal EN of the synchronous buck converter is connected to the second end of resistor R339 and the first end of resistor R340, the internal power supply terminal VCC of the synchronous buck converter is connected to the first end of capacitor C468, the mode selection terminal MODE of the synchronous buck converter is connected to the first end of resistor R349, and the chip select terminal CS of the synchronous buck converter is connected. connected to a first end of resistor R350, a bootstrap power supply terminal BST of the synchronous buck converter is connected to a first end of resistor R358, a second end of resistor R358 is connected to a first end of capacitor C473, a second end of capacitor C473 is connected to power switch terminals SW1 and SW2 of the synchronous buck converter, and a first end of inductor L21, a second end of inductor L21 outputs power and is connected to a first end of capacitor C483, a first end of resistor R380, a first end of capacitor C488, a first end of capacitor C493, and a first end of capacitor C498; A second end of capacitor C483 is connected to a first end of resistor R137, a second end of resistor R137 is connected to a feedback terminal FB of the synchronous buck converter, a second end of resistor R380, and a first end of resistor R381, a status indication terminal PGOOD of the synchronous buck converter is connected to a first end of resistor R366, a second end of resistor R366 outputs a power supply VCC_VCC1V, a reference terminal REF of the synchronous buck converter is connected to a first end of capacitor C478, ground terminals AGND, PGND1, and PGND2 of the synchronous buck converter, a second end of capacitor C478, a second end of resistor R381, a second end of capacitor C488, a second end of capacitor C493, a second end of capacitor C498, a second end of capacitor C449, a second end of capacitor C458, a second end of capacitor C463, a second end of capacitor C468, a second end of resistor R340, a second end of resistor R349, and a second end of resistor R350 are connected to a power ground.

8. The power supply circuit of a domestic routing switch according to claim 7, characterized in that: The circuit connection of the fourth step-down chip further includes: The second end of the inductor L21 is connected to the first end of the resistor R376 , the second end of the resistor R376 is connected to the anode of the light emitting diode HL6 , and the cathode of the light emitting diode HL6 is connected to the power ground.

9. The power supply circuit of a domestic routing switch according to claim 7, characterized in that: The model of the main controller is FMQL45T900 and the model of the processor is GD32F427ZG.

10. The power supply circuit of a domestic routing switch according to claim 1, characterized in that: The circuit connection of the secondary buck chip includes: The power supply terminal VCC of the linear regulator D12, the first terminal of the capacitor C420, the first terminal of the capacitor C423, and the first terminal of the capacitor C426 are connected to the power supply VCC3.3V. The input voltage terminal VIN of the linear regulator D12, the first terminal of the capacitor C428, the first terminal of the capacitor C430, the first terminal of the capacitor C431, and the first terminal of the resistor R334 are connected to the power supply VCC1.5V. The reference voltage terminal REF of the linear regulator D12 is connected to the second terminal of the resistor R334 and the first terminal of the resistor R335. The termination voltage terminal VTT of the linear regulator D12 outputs the power supply PS_DDR3_VTT; and is connected to the first end of the capacitor C436, the first end of the capacitor C439, the first end of the capacitor C442, and the first end of the capacitor C444; The ground terminal of the linear regulator D12, the second end of the capacitor C420, the second end of the capacitor C423, the second end of the capacitor C426, the second end of the capacitor C428, the second end of the capacitor C430, the second end of the capacitor C431, the second end of the resistor R335, the second end of the capacitor C436, the second end of the capacitor C439, the second end of the capacitor C442, and the second end of the capacitor C444 are connected to the power ground.

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