Power management circuit for internal connection system

Abstract

The utility model relates to the technical field of power management, and discloses a power management circuit for an internal connection system, which comprises a power supply module, a first power module and a second power module. According to the application, a complete internal communication system power supply management circuit is constructed, the power supply module provides stable power for the first power supply module and the second power supply module to ensure normal operation of the whole circuit, the first power supply management unit of the first power supply module and the first power supply monitoring unit cooperatively work, and the first power supply monitoring unit monitors two paths of power supplies and generates power supply signals. The first power supply management unit processes the signals to realize accurate management of functions of overload protection, short circuit protection, single-end voltage stabilization and the like of the power supply, and similarly, the second power supply management unit and the second power supply monitoring unit of the second power supply module also effectively monitor and process the other two paths of power supplies. Therefore, independent and efficient management of four paths of power supplies is realized, stable power supply of each channel of the internal communication system is ensured, the reliability and stability of the system are improved, and the influence of a certain channel fault on other channels is avoided.

Description

Technical Field

[0001] This application relates to the field of power management technology, and in particular to a power management circuit for an internal communication system. Background Technology

[0002] In modern communication systems, power management circuits are a crucial component for ensuring stable system operation. Internal communication systems are widely used in communications, industrial control, and other fields. Their basic function is to enable efficient communication between internal components, and a stable power supply is fundamental to achieving this function.

[0003] The existing internal communication system power management circuit has many problems, specifically:

[0004] 1. Regarding power supply stability, some circuits cannot effectively cope with voltage fluctuations. When there is a slight change in the input power supply, the output voltage will deviate significantly, causing the electronic components in the communication system to malfunction and affecting the communication quality.

[0005] 2. In terms of protection functions, many existing circuits lack a complete overload protection and short circuit protection mechanism. Once an overload or short circuit occurs, it is very easy to damage the power supply circuit or even the entire internal communication system, causing huge economic losses and operational failures.

[0006] 3. In terms of fault detection and indication, when a channel malfunctions, it cannot issue a timely and accurate fault indication, making it difficult for maintenance personnel to detect and eliminate the fault in a timely manner, which greatly reduces the reliability and maintenance efficiency of the internal communication system.

[0007] In summary, there is an urgent need for a new power management solution for intercom systems to improve power management performance and support the performance enhancement and widespread application of intercom systems. Utility Model Content

[0008] The purpose of this application is to provide a power management circuit for an internal communication system to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, this application discloses the following technical solution: a power management circuit for an internal communication system, comprising a power supply module, a first power supply module, and a second power supply module;

[0010] The power supply module is used to supply power to the first power supply module and the second power supply module; wherein, the power supply to the first power supply module and the second power supply module are both connected to the power supply module;

[0011] The first power module includes a first power management unit and a first power monitoring unit. The first power management unit is used to process the power signals of the first power monitoring unit, and the first power monitoring unit is used to monitor two power sources and generate the power signals. The first power management unit is connected to the first power monitoring unit.

[0012] The second power module includes a second power management unit and a second power monitoring unit. The second power management unit is used to process the power signals of the second power monitoring unit, and the second power monitoring unit is used to monitor the two power supplies and generate the power signals. The second power management unit is connected to the second power monitoring unit.

[0013] Preferably, in the power supply module, pins 1 and 3 of socket P1 are grounded; pin 2 of socket P1, DCIN, the positive terminal of polarized capacitor C2, and pin 1 of capacitor C1 are all connected to pin 1 of resistor R2; pin 2 of resistor R2 and pin 1 of capacitor C5 are all connected to pin 1 of chip U5; pin 3 of U5, the positive terminal of polarized capacitor C32, pin 1 of capacitor C6, pin 1 of capacitor C111, and the positive terminal of LED D3 are all connected to +5V; the negative terminal of LED D3 is connected to pin 1 of resistor R10; and the negative terminal of polarized diode C2, pin 2 of capacitor C1, pin 2 of capacitor C5, pins 2 and 4 of chip U5, the negative terminal of polarized capacitor C32, pin 2 of capacitor C6, pin 2 of capacitor C111, and pin 2 of resistor R10 are all grounded.

[0014] Pin 1 of capacitor C4 is connected to pin 1 of resistor R4, and pin 2 of capacitor C4 and pin 2 of resistor R4 are both grounded.

[0015] Preferably, in the first power management unit of the first power module, pin 6 of socket P15 and pin 1 of resistor R29 are both connected to +5V; pin 2 of resistor R29 and pin 5 of socket P15 are both connected to pin 4 of chip U1; pin 4 of socket P15 is connected to pin 12 of chip U1; pin 3 of socket P15 is connected to pin 11 of chip U1; pin 2 of socket P15 is connected to pin 13 of chip U1; pin 1 of socket P15 is grounded; pin 14 of chip U1 is grounded; and pin 1 of capacitor C11... Pin 1 is grounded. Pin 2 of capacitor C11 and pin 1 of chip U1 are both connected to +5V. The positive terminals of LEDs D7 and D6 are both connected to +5V. The negative terminal of LED D7 is connected to pin 1 of resistor R35. Pin 2 of resistor R35 is connected to pin 2 of chip U1. The negative terminal of LED D6 is connected to pin 1 of resistor R34. Pin 2 of resistor R34 is connected to pin 3 of chip U1. Pin 10 of chip U1 is connected to the first power monitoring unit. Pin 9 of chip U1 is connected to the... A power monitoring unit is connected. Pin 8 of chip U1 is connected to pin 7 of chip U2. Pin 5 of chip U1 is left floating. Pin 6 of chip U1 is connected to pin 2 of chip U2. Pin 7 of chip U1 is connected to pin 1 of chip U2. Pin 16 of chip U2 is connected to +5V. Pin 15 of chip U2 is grounded. Pin 9 of chip U2 is left floating. Pin 8 of chip U2 is grounded. Pins 11, 12, 13, and 14 of chip U2 are all connected to the first power monitoring unit. Pin 3 of chip U2 is connected to resistor R33. All pins are connected to pin 1 of socket P9. Pin 2 of socket P9 is grounded. Pin 4 of chip U2 and pin 1 of resistor R32 are both connected to pin 3 of socket P9. Pin 5 of chip U2 and pin 1 of resistor R31 are both connected to pin 4 of socket P9. Pin 5 of socket P9 is grounded. Pin 6 of chip U2 is connected to pin 1 of resistor R30. Pin 6 of socket P9 is left floating. Pins 2 of resistor R33, pins 2 of resistor R32, pins 2 of resistor R31 and pins 2 of resistor R30 are all connected to +5V. Pin 10 of chip U2 is left floating.

[0016] Preferably, in the first power monitoring unit of the first power module, pin 1 of resistor R20 is connected to +5V; pin 2 of resistor R20 and pin 13 of chip U2 are both connected to the collector of transistor Q11; the emitter of transistor Q11 is grounded; the base of transistor Q11 is connected to pin 1 of resistor R25; pin 2 of resistor R25 and pin 1 of resistor R26 are both connected to the collector of transistor Q2; pin 2 of resistor R26 is connected to pin 2 of resistor R28; and pin 1 of resistor R28 is connected to pin 9 of chip U1. The collector of transistor Q2 and pin 1 of resistor R7 are both connected to DCIN. The base of transistor Q2 and pin 2 of resistor R7 are both connected to pin 1 of resistor R9. Pin 2 of resistor R9 and the collector of transistor Q4 are both connected to pin 1 of resistor R6. Pin 2 of resistor R6 and pin 2 of resistor R1 are connected to pin 2 of resistor R1. Pin 1 of resistor R1 is connected to DCIN. Pins 2 of resistor R28, pin 2 of resistor R26, and pin 2 of capacitor C10 are all connected to the base of transistor Q12. The emitter of transistor Q12 is grounded. Pin 1 of capacitor C10, the collector of transistor Q12, and pin 2 of resistor R14 are all connected to the base of transistor Q6. Pin 1 of resistor R14 and the positive terminal of polarized capacitor C8 are both connected to pin 1 of resistor R12. The negative terminal of polarized capacitor C8 is grounded. Pin 2 of resistor R12 and the collector of transistor Q6 are both connected to DCIN. The emitter of transistor Q6 is connected to the base of transistor Q4. Pins 1 and 3 of the positive terminal of diode D5 are both connected to the emitter of transistor Q4. Pin 1 of resistor R16 is connected to +5V. Pin 2 of resistor R16 and the collector of transistor Q8 are both connected to pin 14 of chip U2. Pin 2 of transistor Q8 is grounded. The base of transistor Q8 and pin 1 of resistor R22 are both connected to pin 1 of resistor R18. Pin 2 of resistor R22 is grounded. Pin 2 of resistor R18, pin 2 of the negative terminal of diode D5, pin 1 and pin 3 of the positive terminal of polarized capacitor C12 and diode D2 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C12 is grounded. Pin 2 of the positive terminal of diode D2 is connected to DCIN.

[0017] In the first power monitoring unit of the first power module, pin 1 of resistor R19 is connected to +5V. Pin 2 of resistor R19 and pin 11 of chip U2 are both connected to the collector of transistor Q9. The emitter of transistor Q9 is grounded. The base of transistor Q9 is connected to pin 1 of resistor R23. Pins 2 of resistor R23 and pin 1 of resistor R24 ​​are both connected to the collector of transistor Q1. Pin 2 of resistor R24 ​​is connected to pin 2 of resistor R27. Pin 1 of resistor R27 is connected to pin 10 of chip U1. The pins are connected as follows: the emitter of transistor Q1 and pin 1 of resistor R3 are both connected to DCIN; the base of transistor Q1 and pin 2 of resistor R3 are both connected to pin 1 of resistor R8; pin 2 of resistor R8 and the collector of transistor Q3 are both connected to pin 1 of resistor R5; pin 2 of resistor R5 and pin 2 of resistor R1 are connected; pins 2 of resistor R27, pin 2 of resistor R24, and pin 2 of capacitor C9 are all connected to the base of transistor Q10; the emitter of transistor Q10 is grounded; and pin 1 of capacitor C9 and the transistor... The collector of Q10 and pin 2 of resistor R13 are both connected to the base of transistor Q5. Pin 1 of resistor R13 and the positive terminal of polarized capacitor C7 are both connected to pin 1 of resistor R11. The negative terminal of polarized capacitor C7 is grounded. Pin 2 of resistor R11 and the collector of transistor Q5 are both connected to DCIN. The emitter of transistor Q5 is connected to the base of transistor Q3. Pins 1 and 3 of the positive terminal of diode D4 are both connected to the emitter of transistor Q3. Pin 1 of resistor R15 is connected to +5V. Pin 2 of the transistor and the collector of transistor Q7 are both connected to pin 12 of chip U2. Pin 2 of transistor Q7 is grounded. The base of transistor Q7 and pin 1 of resistor R21 are both connected to pin 1 of resistor R17. Pin 2 of resistor R21 is grounded. Pin 2 of resistor R17, pin 2 of the negative terminal of diode D4, the positive terminal of polarized capacitor C3, pin 1 and pin 3 of the positive terminal of diode D1 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C3 is grounded. Pin 2 of the positive terminal of diode D1 is connected to DCIN.

[0018] Preferably, in the second power management unit of the second power module, pin 6 of socket P16 and pin 1 of resistor R129 are both connected to +5V; pin 2 of resistor R129 and pin 5 of socket P16 are both connected to pin 4 of chip U101; pin 4 of socket P16 is connected to pin 12 of chip U101; pin 3 of socket P16 is connected to pin 11 of chip U101; and pin 2 of socket P16 is connected to pin 13 of chip U101. Pin 1 of connector P16 is grounded, pin 14 of chip U101 is grounded, pin 1 of capacitor C33 is grounded, pin 2 of capacitor C33 and pin 1 of chip U101 are both connected to +5V, the positive terminals of LEDs D107 and D106 are both connected to +5V, the negative terminal of LED D107 is connected to pin 1 of resistor R135, pin 2 of resistor R135 is connected to pin 2 of chip U101, and the negative terminal of LED D106 is connected to... Pin 1 and pin 2 of resistor R134 are connected to pin 3 of chip U101. Pin 10 of chip U101 is connected to the second power monitoring unit. Pin 9 of chip U101 is connected to the second power monitoring unit. Pin 8 of chip U101 is connected to pin 7 of chip U102. Pin 5 of chip U101 is left floating. Pin 6 of chip U101 is connected to pin 2 of chip U102. Pin 7 of chip U101 is connected to pin 1 of chip U102. The pins are connected as follows: pin 16 of chip U102 is connected to +5V; pin 15 of chip U102 is grounded; pin 9 of chip U102 is floating; pin 8 of chip U102 is grounded; pins 11, 12, 13, and 14 of chip U102 are all connected to the second power monitoring unit; pins 3, 4, 5, and 6 of chip U102 and pin 1 of capacitor C13 are all connected to +5V; and pin 10 of chip U102 and pin 2 of capacitor C13 are both grounded.

[0019] Preferably, in the second power monitoring unit of the second power module, pin 1 of resistor R119 is connected to +5V; pin 2 of resistor R119 and pin 13 of chip U102 are both connected to the collector of transistor Q109; the emitter of transistor Q109 is grounded; the base of transistor Q109 is connected to pin 1 of resistor R123; pins 2 of resistor R123 and pin 1 of resistor R124 are both connected to the collector of transistor Q101; pin 2 of resistor R124 is connected to pin 2 of resistor R127; and pin 1 of resistor R127 is connected to the collector of chip U101. Pins 10 and 10 are connected. The collector of transistor Q101 and pin 1 of resistor R103 are both connected to DCIN. The base of transistor Q101 and pin 2 of resistor R103 are both connected to pin 1 of resistor R108. Pin 2 of resistor R108 and the collector of transistor Q103 are both connected to pin 1 of resistor R105. Pin 2 of resistor R105 is connected to pin 2 of resistor R1. Pins 2 of resistor R127, pin 2 of resistor R124, and pin 2 of capacitor C109 are all connected to the base of transistor Q110. The emitter of transistor Q110 is grounded. Pin 1 of capacitor C109 is connected to the base of transistor Q110. Pin 1 of resistor R113, the collector of transistor Q110, and pin 2 of resistor R113 are all connected to the base of transistor Q115. Pin 1 of resistor R113 and the positive terminal of polarized capacitor C107 are all connected to pin 1 of resistor R111. The negative terminal of polarized capacitor C107 is grounded. Pin 2 of resistor R111 and the collector of transistor Q115 are both connected to DCIN. The emitter of transistor Q115 is connected to the base of transistor Q103. Pins 1 and 3 of diode D14 are both connected to the emitter of transistor Q103. Pin 1 of resistor R115 is connected to +5V. Pin 2 of R115 and the collector of transistor Q117 are both connected to pin 12 of chip U102. Pin 2 of transistor Q117 is grounded. The base of transistor Q117 and pin 1 of resistor R117 are both connected to pin 1 of resistor R121. Pin 2 of resistor R117 is grounded. Pin 2 of resistor R121, pin 2 of the negative terminal of diode D14, the positive terminal of polarized capacitor C103, pins 1 and 3 of the positive terminal of diode D11 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C103 is grounded. Pin 2 of the positive terminal of diode D11 is connected to DCIN.

[0020] In the second power monitoring unit of the second power module, pin 1 of resistor R120 is connected to +5V. Pin 2 of resistor R120 and pin 13 of chip U102 are both connected to the collector of transistor Q111. The emitter of transistor Q111 is grounded. The base of transistor Q111 is connected to pin 1 of resistor R125. Pins 2 of resistor R125 and pin 1 of resistor R126 are both connected to the collector of transistor Q102. Pin 2 of resistor R126 is connected to pin 2 of resistor R128. Pin 1 of resistor R128 is connected to pin 10 of chip U101. The emitter of transistor Q102 and pin 1 of resistor R107 are both connected to DCIN. The base of transistor Q102 and pin 2 of resistor R107 are both connected to pin 1 of resistor R109. Pin 2 of resistor R109 and the collector of transistor Q104 are both connected to pin 1 of resistor R106. Pin 2 of resistor R106 is connected to pin 2 of resistor R1. Pins 2 of resistors R128 and R126, and pin 2 of capacitor C110 are all connected to the base of transistor Q112. The emitter of transistor Q112 is grounded. Pin 1 of capacitor C110 and the transistor... The collector of Q112 and pin 2 of resistor R114 are both connected to the base of transistor Q106. Pin 1 of resistor R114 and the positive terminal of polarized capacitor C108 are both connected to pin 1 of resistor R112. The negative terminal of polarized capacitor C108 is grounded. Pin 2 of resistor R112 and the collector of transistor Q106 are both connected to DCIN. The emitter of transistor Q106 is connected to the base of transistor Q104. Pins 1 and 3 of the positive terminal of diode D105 are both connected to the emitter of transistor Q104. Pin 1 of resistor R116 is connected to +5V. Resistor R11... Pin 2 of chip 6 and the collector of transistor Q108 are both connected to pin 14 of chip U102. Pin 2 of transistor Q108 is grounded. The base of transistor Q108 and pin 1 of resistor R122 are both connected to pin 1 of resistor R118. Pin 2 of resistor R122 is grounded. Pin 2 of resistor R118, pin 2 of the negative terminal of diode D105, the positive terminal of polarized capacitor C112, pins 1 and 3 of the positive terminal of diode D102 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C112 is grounded. Pin 2 of the positive terminal of diode D102 is connected to DCIN.

[0021] Beneficial Effects: This application discloses a power management circuit for an internal communication system, which constructs a complete power management circuit for the internal communication system. The power supply module provides stable power to the first and second power supply modules, ensuring the normal operation of the overall circuit. The first power management unit and the first power monitoring unit of the first power supply module work together. The first power monitoring unit monitors the two power supplies and generates power signals. The first power management unit processes these signals to achieve precise management of the power supply, including overload protection, short circuit protection, and single-ended voltage regulation. Similarly, the second power management unit and the second power monitoring unit of the second power supply module also effectively monitor and process the other two power supplies, thereby achieving independent and efficient management of the four power supplies, ensuring stable power supply to each channel of the internal communication system, improving the reliability and stability of the system, and preventing a failure in one channel from affecting other channels. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A circuit schematic diagram of a power management circuit for an internal communication system provided in an embodiment of this application;

[0024] Reference numerals: 100, LNB signal input port; 101, LNB signal input port; 110, DiSEqC signal drive switching circuit; 120, DiSEqC signal drive switching circuit; 210, two-channel LNB secondary signal; 220, LNB signal input channel circuit; 310, LNB primary signal; 320, LNB signal input channel circuit; 410, output port; 510, DiSEqC two-to-one switching circuit. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] This embodiment discloses, as follows: Figure 1 The power management circuit for an internal communication system shown includes a power supply module, a first power supply module, and a second power supply module.

[0028] The power supply module is used to supply power to the first power supply module and the second power supply module; wherein, the power supply to both the first power supply module and the second power supply module is connected to the power supply module;

[0029] The first power module includes a first power management unit and a first power monitoring unit. The first power management unit is used to process the power signals of the first power monitoring unit, and the first power monitoring unit is used to monitor the two power supplies and generate power signals. The first power management unit is connected to the first power monitoring unit.

[0030] The second power module includes a second power management unit and a second power monitoring unit. The second power management unit is used to process the power signals of the second power monitoring unit, and the second power monitoring unit is used to monitor the two power supplies and generate power signals. The second power management unit is connected to the second power monitoring unit.

[0031] Based on the above, this embodiment constructs a complete power management circuit for the internal communication system. The power supply module provides stable power to the first and second power supply modules, ensuring the normal operation of the overall circuit. The first power management unit and the first power monitoring unit of the first power supply module work together. The first power monitoring unit monitors the two power supplies and generates power signals. The first power management unit processes these signals to achieve precise management of the power supply, including overload protection, short circuit protection, and single-ended voltage regulation. Similarly, the second power management unit and the second power monitoring unit of the second power supply module also effectively monitor and process the other two power supplies, thereby achieving independent and efficient management of the four power supplies, ensuring stable power supply to each channel of the internal communication system, improving the reliability and stability of the system, and preventing a failure in one channel from affecting other channels.

[0032] Specifically, in the power supply module, pins 1 and 3 of socket P1 are grounded. Pins 2, DCIN, the positive terminal of polarized capacitor C2, and pin 1 of capacitor C1 are all connected to pin 1 of resistor R2. Pins 2 of resistor R2 and pin 1 of capacitor C5 are all connected to pin 1 of chip U5. Pin 3 of U5, the positive terminal of polarized capacitor C32, pin 1 of capacitor C6, pin 1 of capacitor C111, and the positive terminal of LED D3 are all connected to +5V. The negative terminal of LED D3 is connected to pin 1 of resistor R10. The negative terminal of polarized diode C2, pins 2 of capacitor C1, pin 2 of capacitor C5, pins 2 and 4 of chip U5, the negative terminal of polarized capacitor C32, pins 2 of capacitor C6, pins 2 of capacitor C111, and pin 2 of resistor R10 are all grounded.

[0033] Pin 1 of capacitor C4 is connected to pin 1 of resistor R4, and pin 2 of capacitor C4 and pin 2 of resistor R4 are both grounded.

[0034] In a specific example, the input DC power supply of this embodiment is Mean Well DC27V, 1.8A. The entire circuit is powered by this DC power supply. The chip U5 is model LM2931AS-5.0. The output regulated +5V power supply is used to power the VCC and VDD output ports of all digital circuits. The grounding design is a single grounding output by capacitor C4 and resistor R4 in parallel for filtering.

[0035] Based on the above, this embodiment achieves stable power input and processing, implementing current limiting and filtering of the input power to reduce interference and fluctuations. Specifically, chip U5 performs voltage regulation, converting the input voltage into a stable +5V output, providing reliable power for subsequent circuits. Polarized capacitors C32, C6, and C111 further filter the power, ensuring the stability of the +5V supply. An indicator circuit consisting of LED D3 and resistor R10 provides a convenient and intuitive understanding of the +5V power supply's operating status. A parallel filtering grounding circuit composed of capacitor C4 and resistor R4 effectively reduces grounding interference. Based on this, the stability and reliability of the entire power supply module are improved, providing a solid power foundation for the internal communication system's power management circuit.

[0036] Specifically, in the first power management unit of the first power module, pin 6 of socket P15 and pin 1 of resistor R29 are both connected to +5V; pin 2 of resistor R29 and pin 5 of socket P15 are both connected to pin 4 of chip U1; pin 4 of socket P15 is connected to pin 12 of chip U1; pin 3 of socket P15 is connected to pin 11 of chip U1; pin 2 of socket P15 is connected to pin 13 of chip U1; pin 1 of socket P15 is grounded; pin 14 of chip U1 is grounded; and pin 1 of capacitor C11 is connected to... Ground, pin 2 of capacitor C11 and pin 1 of chip U1 are both connected to +5V, the positive terminals of LEDs D7 and D6 are both connected to +5V, the negative terminal of LED D7 is connected to pin 1 of resistor R35, pin 2 of resistor R35 is connected to pin 2 of chip U1, the negative terminal of LED D6 is connected to pin 1 of resistor R34, pin 2 of resistor R34 is connected to pin 3 of chip U1, pin 10 of chip U1 is connected to the first power monitoring unit, and pin 9 of chip U1 is connected to the first power monitoring unit. The control unit is connected. Pin 8 of chip U1 is connected to pin 7 of chip U2. Pin 5 of chip U1 is left floating. Pin 6 of chip U1 is connected to pin 2 of chip U2. Pin 7 of chip U1 is connected to pin 1 of chip U2. Pin 16 of chip U2 is connected to +5V. Pin 15 of chip U2 is grounded. Pin 9 of chip U2 is left floating. Pin 8 of chip U2 is grounded. Pins 11, 12, 13, and 14 of chip U2 are all connected to the first power monitoring unit. Pin 3 of chip U2 and pin 1 of resistor R33 are both connected to... Pin 1 of socket P9 is connected, pin 2 of socket P9 is grounded, pin 4 of chip U2 and pin 1 of resistor R32 are both connected to pin 3 of socket P9, pin 5 of chip U2 and pin 1 of resistor R31 are both connected to pin 4 of socket P9, pin 5 of socket P9 is grounded, pin 6 of chip U2 and pin 1 of resistor R30 are connected, pin 6 of socket P9 is left floating, pins 2 of resistors R33, R32, R31 and R30 are all connected to +5V, and pin 10 of chip U2 is left floating.

[0037] In one specific example, chips U1 and U101 in this embodiment are MCUs, and the selected model is PIC16F505-I, while chips U2 and U102 are shift registers, and the selected model is 74HC165D.

[0038] Through the above, this embodiment realizes the processing and status indication of power signals. Specifically, socket P15 is connected to chips U1 and U2, providing power and signal input to the chips; LEDs D7 and D6, along with resistors R35 and R34, are connected to pins 2 and 3 of chip U1, respectively, and through preset internal programming, control level changes to display the normal operation and fault status of the power supply; pins 8, 6, and 7 of chip U1 are connected to chip U2, jointly processing the power signals, and pins 11, 12, 13, and 14 of chip U2 are connected to the first power monitoring unit, transmitting the processed signals to the monitoring unit. Based on this, the first power management unit can accurately manage and monitor the power status, ensuring the stable operation of the internal communication system power supply.

[0039] Specifically, in the first power monitoring unit of the first power module, pin 1 of resistor R20 is connected to +5V; pin 2 of resistor R20 and pin 13 of chip U2 are both connected to the collector of transistor Q11; the emitter of transistor Q11 is grounded; the base of transistor Q11 is connected to pin 1 of resistor R25; pins 2 of resistor R25 and pin 1 of resistor R26 are both connected to the collector of transistor Q2; pin 2 of resistor R26 is connected to pin 2 of resistor R28; and pin 1 of resistor R28 is connected to pin 9 of chip U1. The collector of transistor Q2 and pin 1 of resistor R7 are both connected to DCIN. The base of transistor Q2 and pin 2 of resistor R7 are both connected to pin 1 of resistor R9. Pin 2 of resistor R9 and the collector of transistor Q4 are both connected to pin 1 of resistor R6. Pin 2 of resistor R6 and pin 2 of resistor R1 are connected to DCIN. Pins 2 of resistors R28 and R26 and pin 2 of capacitor C10 are all connected to the base of transistor Q12. The emitter of transistor Q12 is grounded. Pin 1 of resistor R14, the collector of transistor Q12, and pin 2 of resistor R14 are all connected to the base of transistor Q6. Pin 1 of resistor R14 and the positive terminal of polarized capacitor C8 are both connected to pin 1 of resistor R12. The negative terminal of polarized capacitor C8 is grounded. Pin 2 of resistor R12 and the collector of transistor Q6 are both connected to DCIN. The emitter of transistor Q6 is connected to the base of transistor Q4. Pins 1 and 3 of the positive terminal of diode D5 are both connected to the emitter of transistor Q4. Pin 1 of resistor R16 is connected to +5V. Pin 2 of R16 and the collector of transistor Q8 are both connected to pin 14 of chip U2. Pin 2 of transistor Q8 is grounded. The base of transistor Q8 and pin 1 of resistor R22 are both connected to pin 1 of resistor R18. Pin 2 of resistor R22 is grounded. Pin 2 of resistor R18, pin 2 of the negative terminal of diode D5, pin 1 and pin 3 of the positive terminal of polarized capacitor C12 and diode D2 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C12 is grounded. Pin 2 of the positive terminal of diode D2 is connected to DCIN.

[0040] In the first power monitoring unit of the first power module, pin 1 of resistor R19 is connected to +5V. Pin 2 of resistor R19 and pin 11 of chip U2 are both connected to the collector of transistor Q9. The emitter of transistor Q9 is grounded. The base of transistor Q9 is connected to pin 1 of resistor R23. Pins 2 of resistor R23 and pin 1 of resistor R24 ​​are both connected to the collector of transistor Q1. Pin 2 of resistor R24 ​​is connected to pin 2 of resistor R27. Pin 1 of resistor R27 is connected to pin 10 of chip U1. The emitter of transistor Q1 and pin 1 of resistor R3 are both connected to DCIN. The base of transistor Q1 and pin 2 of resistor R3 are both connected to pin 1 of resistor R8. Pin 2 of resistor R8 and the collector of transistor Q3 are both connected to pin 1 of resistor R5. Pin 2 of resistor R5 and pin 2 of resistor R1 are connected. Pins 2 of resistor R27, pin 2 of resistor R24, and pin 2 of capacitor C9 are all connected to the base of transistor Q10. The emitter of transistor Q10 is grounded. Pin 1 of capacitor C9 and pin 2 of transistor Q1... The collector of diode D4 and pin 2 of resistor R13 are both connected to the base of transistor Q5. Pin 1 of resistor R13 and the positive terminal of polarized capacitor C7 are both connected to pin 1 of resistor R11. The negative terminal of polarized capacitor C7 is grounded. Pin 2 of resistor R11 and the collector of transistor Q5 are both connected to DCIN. The emitter of transistor Q5 is connected to the base of transistor Q3. Pins 1 and 3 of the positive terminal of diode D4 are both connected to the emitter of transistor Q3. Pin 1 of resistor R15 is connected to +5V. Pin 2 and the collector of transistor Q7 are both connected to pin 12 of chip U2. Pin 2 of transistor Q7 is grounded. The base of transistor Q7 and pin 1 of resistor R21 are both connected to pin 1 of resistor R17. Pin 2 of resistor R21 is grounded. Pin 2 of resistor R17, pin 2 of the negative terminal of diode D4, the positive terminal of polarized capacitor C3, pin 1 and pin 3 of the positive terminal of diode D1 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C3 is grounded. Pin 2 of the positive terminal of diode D1 is connected to DCIN.

[0041] Through the above, this embodiment achieves the monitoring and stable output of two power supplies. Resistors, transistors, capacitors, and diodes work together to amplify, filter, and regulate the power supply signal. For example, the +5V power supply, after current limiting by resistor R20, drives transistor Q11 for signal amplification. Transistors Q12, Q6, and Q4 further process the signal, ultimately outputting a stable voltage to the preset internal communication system through diodes D5 and D2. Simultaneously, pin 14 of chip U2 uses transistor Q8 and other components to provide feedback regulation of the output voltage, enhancing its stability. Based on this, real-time monitoring of the power supply status is achieved, allowing for timely adjustments when abnormalities occur, ensuring a stable power supply to the internal communication system.

[0042] Specifically, in the second power management unit of the second power module, pin 6 of socket P16 and pin 1 of resistor R129 are both connected to +5V; pin 2 of resistor R129 and pin 5 of socket P16 are both connected to pin 4 of chip U101; pin 4 of socket P16 is connected to pin 12 of chip U101; pin 3 of socket P16 is connected to pin 11 of chip U101; pin 2 of socket P16 is connected to pin 13 of chip U101; and so on. Pin 1 of LED 6 is grounded, pin 14 of chip U101 is grounded, pin 1 of capacitor C33 is grounded, pin 2 of capacitor C33 and pin 1 of chip U101 are both connected to +5V, the positive terminals of LED D107 and LED D106 are both connected to +5V, the negative terminal of LED D107 is connected to pin 1 of resistor R135, pin 2 of resistor R135 is connected to pin 2 of chip U101, and the negative terminal of LED D106 is connected to... Pin 1 and pin 2 of resistor R134 are connected to pin 3 of chip U101. Pin 10 of chip U101 is connected to the second power monitoring unit. Pin 9 of chip U101 is also connected to the second power monitoring unit. Pin 8 of chip U101 is connected to pin 7 of chip U102. Pin 5 of chip U101 is left floating. Pin 6 of chip U101 is connected to pin 2 of chip U102. Pin 7 of chip U101 is connected to pin 1 of chip U102. The following connections are made: pin 16 of chip U102 is connected to +5V; pin 15 of chip U102 is grounded; pin 9 of chip U102 is floating; pin 8 of chip U102 is grounded; pins 11, 12, 13, and 14 of chip U102 are all connected to the second power monitoring unit; pins 3, 4, 5, and 6 of chip U102 and pin 1 of capacitor C13 are all connected to +5V; and pin 10 of chip U102 and pin 2 of capacitor C13 are both grounded.

[0043] Specifically, in the second power monitoring unit of the second power module, pin 1 of resistor R119 is connected to +5V; pin 2 of resistor R119 and pin 13 of chip U102 are both connected to the collector of transistor Q109; the emitter of transistor Q109 is grounded; the base of transistor Q109 is connected to pin 1 of resistor R123; pins 2 of resistor R123 and pin 1 of resistor R124 are both connected to the collector of transistor Q101; pin 2 of resistor R124 is connected to pin 2 of resistor R127; and pin 1 of resistor R127 is connected to pin 10 of chip U101. The collector of transistor Q101 and pin 1 of resistor R103 are both connected to DCIN. The base of transistor Q101 and pin 2 of resistor R103 are both connected to pin 1 of resistor R108. Pin 2 of resistor R108 and the collector of transistor Q103 are both connected to pin 1 of resistor R105. Pin 2 of resistor R105 is connected to pin 2 of resistor R1. Pins 2 of resistors R127 and R124, and pin 2 of capacitor C109 are all connected to the base of transistor Q110. The emitter of transistor Q110 is grounded. Pin 1 of capacitor C109... The collector of transistor Q110 and pin 2 of resistor R113 are both connected to the base of transistor Q115. Pin 1 of resistor R113 and the positive terminal of polarized capacitor C107 are both connected to pin 1 of resistor R111. The negative terminal of polarized capacitor C107 is grounded. Pin 2 of resistor R111 and the collector of transistor Q115 are both connected to DCIN. The emitter of transistor Q115 is connected to the base of transistor Q103. Pins 1 and 3 of the positive terminal of diode D14 are both connected to the emitter of transistor Q103. Pin 1 of resistor R115 is connected to +5V. Pin 2 of 115 and the collector of transistor Q117 are both connected to pin 12 of chip U102. Pin 2 of transistor Q117 is grounded. The base of transistor Q117 and pin 1 of resistor R117 are both connected to pin 1 of resistor R121. Pin 2 of resistor R117 is grounded. Pin 2 of resistor R121, pin 2 of the negative terminal of diode D14, the positive terminal of polarized capacitor C103, pins 1 and 3 of the positive terminal of diode D11 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C103 is grounded. Pin 2 of the positive terminal of diode D11 is connected to DCIN.

[0044] In the second power monitoring unit of the second power module, pin 1 of resistor R120 is connected to +5V. Pin 2 of resistor R120 and pin 13 of chip U102 are both connected to the collector of transistor Q111. The emitter of transistor Q111 is grounded. The base of transistor Q111 is connected to pin 1 of resistor R125. Pins 2 of resistor R125 and pin 1 of resistor R126 are both connected to the collector of transistor Q102. Pin 2 of resistor R126 is connected to pin 2 of resistor R128. Pin 1 of resistor R128 is connected to pin 10 of chip U101. The emitter of transistor Q102 and pin 1 of resistor R107 are both connected to DCIN. The base of transistor Q102 and pin 2 of resistor R107 are both connected to pin 1 of resistor R109. Pin 2 of resistor R109 and the collector of transistor Q104 are both connected to pin 1 of resistor R106. Pin 2 of resistor R106 and pin 2 of resistor R1 are connected to pin 2 of resistor R1. Pins 2 of resistors R128 and R126 and pin 2 of capacitor C110 are all connected to the base of transistor Q112. The emitter of transistor Q112 is grounded. Pin 1 of capacitor C110 and pin 2 of transistor Q104 are both connected to DCIN. The collector of diode 12 and pin 2 of resistor R114 are both connected to the base of transistor Q106. Pin 1 of resistor R114 and the positive terminal of polarized capacitor C108 are both connected to pin 1 of resistor R112. The negative terminal of polarized capacitor C108 is grounded. Pin 2 of resistor R112 and the collector of transistor Q106 are both connected to DCIN. The emitter of transistor Q106 is connected to the base of transistor Q104. Pins 1 and 3 of the positive terminal of diode D105 are both connected to the emitter of transistor Q104. Pin 1 of resistor R116 is connected to +5V. Pin 2 of the transistor and the collector of transistor Q108 are both connected to pin 14 of chip U102. Pin 2 of transistor Q108 is grounded. The base of transistor Q108 and pin 1 of resistor R122 are both connected to pin 1 of resistor R118. Pin 2 of resistor R122 is grounded. Pin 2 of resistor R118, pin 2 of the negative terminal of diode D105, the positive terminal of polarized capacitor C112, pins 1 and 3 of the positive terminal of diode D102 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C112 is grounded. Pin 2 of the positive terminal of diode D102 is connected to DCIN.

[0045] It should be noted that the second power module and its corresponding second power management unit and second power monitoring unit in this embodiment correspond to the first power module and its corresponding first power management unit and first power monitoring unit mentioned above. Therefore, the contents of the second power module and its corresponding second power management unit and second power monitoring unit in this embodiment that are not specifically described may include, but are not limited to, functional definitions, working principles and technical effects, etc., and can be referred to the records in the first power module and its corresponding first power management unit and first power monitoring unit mentioned above. This text will not repeat them here.

[0046] In summary, the power management circuit for the internal communication system in this embodiment constructs a complete power management circuit for the internal communication system. The power supply module provides stable power to the first and second power supply modules, ensuring the normal operation of the overall circuit. The first power management unit and the first power monitoring unit of the first power supply module work together. The first power monitoring unit monitors the two power supplies and generates power signals. The first power management unit processes these signals to achieve precise management of the power supply, including overload protection, short circuit protection, and single-ended voltage regulation. Similarly, the second power management unit and the second power monitoring unit of the second power supply module also effectively monitor and process the other two power supplies, thereby achieving independent and efficient management of the four power supplies, ensuring stable power supply to each channel of the internal communication system, improving the reliability and stability of the system, and preventing a failure in one channel from affecting other channels.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power management circuit for an internal communication system, characterized in that, Includes a power supply module, a first power supply module, and a second power supply module; The power supply module is used to supply power to the first power supply module and the second power supply module; wherein, the power supply to the first power supply module and the second power supply module are both connected to the power supply module; The first power module includes a first power management unit and a first power monitoring unit. The first power management unit is used to process the power signals of the first power monitoring unit, and the first power monitoring unit is used to monitor two power supplies and generate the power signals. The first power management unit is connected to the first power monitoring unit. The second power module includes a second power management unit and a second power monitoring unit. The second power management unit is used to process the power signals of the second power monitoring unit, and the second power monitoring unit is used to monitor the two power supplies and generate the power signals. The second power management unit is connected to the second power monitoring unit.

2. The power management circuit for an internal communication system according to claim 1, characterized in that, In the power supply module, pins 1 and 3 of socket P1 are grounded. Pins 2, DCIN, the positive terminal of polarized capacitor C2, and pin 1 of capacitor C1 are all connected to pin 1 of resistor R2. Pins 2 of resistor R2 and pin 1 of capacitor C5 are all connected to pin 1 of chip U5. Pin 3 of U5, the positive terminal of polarized capacitor C32, pin 1 of capacitor C6, pin 1 of capacitor C111, and the positive terminal of LED D3 are all connected to +5V. The negative terminal of LED D3 is connected to pin 1 of resistor R10. The negative terminal of polarized diode C2, pins 2 of capacitor C1, pin 2 of capacitor C5, pins 2 and 4 of chip U5, the negative terminal of polarized capacitor C32, pins 2 of capacitor C6, pins 2 of capacitor C111, and pin 2 of resistor R10 are all grounded. Pin 1 of capacitor C4 is connected to pin 1 of resistor R4, and pin 2 of capacitor C4 and pin 2 of resistor R4 are both grounded.

3. The power management circuit for an internal communication system according to claim 1, characterized in that, In the first power management unit of the first power module, pin 6 of socket P15 and pin 1 of resistor R29 are both connected to +5V; pin 2 of resistor R29 and pin 5 of socket P15 are both connected to pin 4 of chip U1; pin 4 of socket P15 is connected to pin 12 of chip U1; pin 3 of socket P15 is connected to pin 11 of chip U1; pin 2 of socket P15 is connected to pin 13 of chip U1; pin 1 of socket P15 is grounded; pin 14 of chip U1 is grounded; and pin 1 of capacitor C11 is grounded. Pin 2 of capacitor C11 and pin 1 of chip U1 are both connected to +5V. The positive terminals of LEDs D7 and D6 are both connected to +5V. The negative terminal of LED D7 is connected to pin 1 of resistor R35. Pin 2 of resistor R35 is connected to pin 2 of chip U1. The negative terminal of LED D6 is connected to pin 1 of resistor R34. Pin 2 of resistor R34 is connected to pin 3 of chip U1. Pin 10 of chip U1 is connected to the first power monitoring unit. Pin 9 of chip U1 is connected to the first power supply... The monitoring unit is connected. Pin 8 of chip U1 is connected to pin 7 of chip U2. Pin 5 of chip U1 is left floating. Pin 6 of chip U1 is connected to pin 2 of chip U2. Pin 7 of chip U1 is connected to pin 1 of chip U2. Pin 16 of chip U2 is connected to +5V. Pin 15 of chip U2 is grounded. Pin 9 of chip U2 is left floating. Pin 8 of chip U2 is grounded. Pins 11, 12, 13, and 14 of chip U2 are all connected to the first power monitoring unit. Pin 3 of chip U2 and pin 1 of resistor R33 are both connected to the first power monitoring unit. Pin 1 of socket P9 is connected to the ground. Pin 2 of socket P9 is grounded. Pin 4 of chip U2 and pin 1 of resistor R32 are both connected to pin 3 of socket P9. Pin 5 of chip U2 and pin 1 of resistor R31 are both connected to pin 4 of socket P9. Pin 5 of socket P9 is grounded. Pin 6 of chip U2 is connected to pin 1 of resistor R30. Pin 6 of socket P9 is left floating. Pins 2 of resistor R33, R32, R31, and R30 are all connected to +5V. Pin 10 of chip U2 is left floating.

4. The power management circuit for an internal communication system according to claim 3, characterized in that, In the first power monitoring unit of the first power module, pin 1 of resistor R20 is connected to +5V. Pin 2 of resistor R20 and pin 13 of chip U2 are both connected to the collector of transistor Q11. The emitter of transistor Q11 is grounded. The base of transistor Q11 is connected to pin 1 of resistor R25. Pins 2 of resistor R25 and pin 1 of resistor R26 are both connected to the collector of transistor Q2. Pin 2 of resistor R26 is connected to pin 2 of resistor R28. Pin 1 of resistor R28 is connected to pin 9 of chip U1. The collector of transistor Q2 and pin 1 of resistor R7 are both connected to DCIN. The base of transistor Q2 and pin 2 of resistor R7 are both connected to pin 1 of resistor R9. Pin 2 of resistor R9 and the collector of transistor Q4 are both connected to pin 1 of resistor R6. Pin 2 of resistor R6 and pin 2 of resistor R1 are connected to DCIN. Pins 2 of resistors R28 and R26 and pin 2 of capacitor C10 are all connected to the base of transistor Q12. The emitter of transistor Q12 is grounded. Pin 1 of resistor R14, the collector of transistor Q12, and pin 2 of resistor R14 are all connected to the base of transistor Q6. Pin 1 of resistor R14 and the positive terminal of polarized capacitor C8 are both connected to pin 1 of resistor R12. The negative terminal of polarized capacitor C8 is grounded. Pin 2 of resistor R12 and the collector of transistor Q6 are both connected to DCIN. The emitter of transistor Q6 is connected to the base of transistor Q4. Pins 1 and 3 of the positive terminal of diode D5 are both connected to the emitter of transistor Q4. Pin 1 of resistor R16 is connected to +5V. Pin 2 of R16 and the collector of transistor Q8 are both connected to pin 14 of chip U2. Pin 2 of transistor Q8 is grounded. The base of transistor Q8 and pin 1 of resistor R22 are both connected to pin 1 of resistor R18. Pin 2 of resistor R22 is grounded. Pin 2 of resistor R18, pin 2 of the negative terminal of diode D5, pin 1 and pin 3 of the positive terminal of polarized capacitor C12 and diode D2 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C12 is grounded. Pin 2 of the positive terminal of diode D2 is connected to DCIN. In the first power monitoring unit of the first power module, pin 1 of resistor R19 is connected to +5V. Pin 2 of resistor R19 and pin 11 of chip U2 are both connected to the collector of transistor Q9. The emitter of transistor Q9 is grounded. The base of transistor Q9 is connected to pin 1 of resistor R23. Pins 2 of resistor R23 and pin 1 of resistor R24 ​​are both connected to the collector of transistor Q1. Pin 2 of resistor R24 ​​is connected to pin 2 of resistor R27. Pin 1 of resistor R27 is connected to pin 10 of chip U1. The pins are connected as follows: the emitter of transistor Q1 and pin 1 of resistor R3 are both connected to DCIN; the base of transistor Q1 and pin 2 of resistor R3 are both connected to pin 1 of resistor R8; pin 2 of resistor R8 and the collector of transistor Q3 are both connected to pin 1 of resistor R5; pin 2 of resistor R5 and pin 2 of resistor R1 are connected; pins 2 of resistor R27, pin 2 of resistor R24, and pin 2 of capacitor C9 are all connected to the base of transistor Q10; the emitter of transistor Q10 is grounded; and pin 1 of capacitor C9 and the transistor... The collector of Q10 and pin 2 of resistor R13 are both connected to the base of transistor Q5. Pin 1 of resistor R13 and the positive terminal of polarized capacitor C7 are both connected to pin 1 of resistor R11. The negative terminal of polarized capacitor C7 is grounded. Pin 2 of resistor R11 and the collector of transistor Q5 are both connected to DCIN. The emitter of transistor Q5 is connected to the base of transistor Q3. Pins 1 and 3 of the positive terminal of diode D4 are both connected to the emitter of transistor Q3. Pin 1 of resistor R15 is connected to +5V. Pin 2 of the transistor and the collector of transistor Q7 are both connected to pin 12 of chip U2. Pin 2 of transistor Q7 is grounded. The base of transistor Q7 and pin 1 of resistor R21 are both connected to pin 1 of resistor R17. Pin 2 of resistor R21 is grounded. Pin 2 of resistor R17, pin 2 of the negative terminal of diode D4, the positive terminal of polarized capacitor C3, pin 1 and pin 3 of the positive terminal of diode D1 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C3 is grounded. Pin 2 of the positive terminal of diode D1 is connected to DCIN.

5. The power management circuit for an internal communication system according to claim 1, characterized in that, In the second power management unit of the second power module, pin 6 of socket P16 and pin 1 of resistor R129 are both connected to +5V; pin 2 of resistor R129 and pin 5 of socket P16 are both connected to pin 4 of chip U101; pin 4 of socket P16 is connected to pin 12 of chip U101; pin 3 of socket P16 is connected to pin 11 of chip U101; pin 2 of socket P16 is connected to pin 13 of chip U101; and so on. Pin 1 of the capacitor is grounded, pin 14 of chip U101 is grounded, pin 1 of capacitor C33 is grounded, pin 2 of capacitor C33 and pin 1 of chip U101 are both connected to +5V, the positive terminals of LEDs D107 and D106 are both connected to +5V, the negative terminal of LED D107 is connected to pin 1 of resistor R135, pin 2 of resistor R135 is connected to pin 2 of chip U101, and the negative terminal of LED D106 is connected to resistor R135. Pin 1 of IC 134 is connected to pin 2 of resistor R134 and pin 3 of chip U101. Pin 10 of chip U101 is connected to the second power monitoring unit. Pin 9 of chip U101 is connected to the second power monitoring unit. Pin 8 of chip U101 is connected to pin 7 of chip U102. Pin 5 of chip U101 is left floating. Pin 6 of chip U101 is connected to pin 2 of chip U102. Pin 7 of chip U101 is connected to pin 1 of chip U102. The following connections are made: pin 16 of chip U102 is connected to +5V; pin 15 of chip U102 is grounded; pin 9 of chip U102 is floating; pin 8 of chip U102 is grounded; pins 11, 12, 13, and 14 of chip U102 are all connected to the second power monitoring unit; pins 3, 4, 5, and 6 of chip U102 and pin 1 of capacitor C13 are all connected to +5V; and pin 10 of chip U102 and pin 2 of capacitor C13 are both grounded.

6. The power management circuit for an internal communication system according to claim 5, characterized in that, In the second power monitoring unit of the second power module, pin 1 of resistor R119 is connected to +5V. Pin 2 of resistor R119 and pin 13 of chip U102 are both connected to the collector of transistor Q109. The emitter of transistor Q109 is grounded. The base of transistor Q109 is connected to pin 1 of resistor R123. Pins 2 of resistor R123 and pin 1 of resistor R124 are both connected to the collector of transistor Q101. Pin 2 of resistor R124 is connected to pin 2 of resistor R127. Pin 1 of resistor R127 is connected to pin 10 of chip U101. The collector of transistor Q101 and pin 1 of resistor R103 are both connected to DCIN. The base of transistor Q101 and pin 2 of resistor R103 are both connected to pin 1 of resistor R108. Pin 2 of resistor R108 and the collector of transistor Q103 are both connected to pin 1 of resistor R105. Pin 2 of resistor R105 is connected to pin 2 of resistor R1. Pins 2 of resistors R127 and R124, and pin 2 of capacitor C109 are all connected to the base of transistor Q110. The emitter of transistor Q110 is grounded. Pin 1 of capacitor C109... The collector of transistor Q110 and pin 2 of resistor R113 are both connected to the base of transistor Q115. Pin 1 of resistor R113 and the positive terminal of polarized capacitor C107 are both connected to pin 1 of resistor R111. The negative terminal of polarized capacitor C107 is grounded. Pin 2 of resistor R111 and the collector of transistor Q115 are both connected to DCIN. The emitter of transistor Q115 is connected to the base of transistor Q103. Pins 1 and 3 of the positive terminal of diode D14 are both connected to the emitter of transistor Q103. Pin 1 of resistor R115 is connected to +5V. Pin 2 of 115 and the collector of transistor Q117 are both connected to pin 12 of chip U102. Pin 2 of transistor Q117 is grounded. The base of transistor Q117 and pin 1 of resistor R117 are both connected to pin 1 of resistor R121. Pin 2 of resistor R117 is grounded. Pin 2 of resistor R121, pin 2 of the negative terminal of diode D14, the positive terminal of polarized capacitor C103, pins 1 and 3 of the positive terminal of diode D11 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C103 is grounded. Pin 2 of the positive terminal of diode D11 is connected to DCIN. In the second power monitoring unit of the second power module, pin 1 of resistor R120 is connected to +5V. Pin 2 of resistor R120 and pin 13 of chip U102 are both connected to the collector of transistor Q111. The emitter of transistor Q111 is grounded. The base of transistor Q111 is connected to pin 1 of resistor R125. Pins 2 of resistor R125 and pin 1 of resistor R126 are both connected to the collector of transistor Q102. Pin 2 of resistor R126 is connected to pin 2 of resistor R128. Pin 1 of resistor R128 is connected to pin 10 of chip U101. The emitter of transistor Q102 and pin 1 of resistor R107 are both connected to DCIN. The base of transistor Q102 and pin 2 of resistor R107 are both connected to pin 1 of resistor R109. Pin 2 of resistor R109 and the collector of transistor Q104 are both connected to pin 1 of resistor R106. Pin 2 of resistor R106 is connected to pin 2 of resistor R1. Pins 2 of resistors R128 and R126, and pin 2 of capacitor C110 are all connected to the base of transistor Q112. The emitter of transistor Q112 is grounded. Pin 1 of capacitor C110 and the transistor... The collector of Q112 and pin 2 of resistor R114 are both connected to the base of transistor Q106. Pin 1 of resistor R114 and the positive terminal of polarized capacitor C108 are both connected to pin 1 of resistor R112. The negative terminal of polarized capacitor C108 is grounded. Pin 2 of resistor R112 and the collector of transistor Q106 are both connected to DCIN. The emitter of transistor Q106 is connected to the base of transistor Q104. Pins 1 and 3 of the positive terminal of diode D105 are both connected to the emitter of transistor Q104. Pin 1 of resistor R116 is connected to +5V. Resistor R11... Pin 2 of chip 6 and the collector of transistor Q108 are both connected to pin 14 of chip U102. Pin 2 of transistor Q108 is grounded. The base of transistor Q108 and pin 1 of resistor R122 are both connected to pin 1 of resistor R118. Pin 2 of resistor R122 is grounded. Pin 2 of resistor R118, pin 2 of the negative terminal of diode D105, the positive terminal of polarized capacitor C112, pins 1 and 3 of the positive terminal of diode D102 are connected and connected to the preset internal communication system. The negative terminal of polarized capacitor C112 is grounded. Pin 2 of the positive terminal of diode D102 is connected to DCIN.

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