Power management control circuit based on MCU

Abstract

The invention, which relates to the technical field of power management, discloses an MCU-based power management control circuit comprising a first voltage stabilization module and a second voltage stabilization module which are used for carrying out voltage stabilization processing on DC electric energy provided by a power supply module so as to provide two groups of different voltage stabilization values required by an MCU module. The MCU module controls the third voltage stabilization module to carry out voltage stabilization adjustment work and supply power to the connected electric equipment, and the state detection module detects a voltage stabilization value provided by the first voltage stabilization module according to a set first overvoltage threshold value and a set first undervoltage threshold value, and when overvoltage or undervoltage occurs, the state detection module controls the third voltage stabilization module to carry out voltage stabilization adjustment work and supplies power to the connected electric equipment. And the power management module controls the third voltage stabilization module to supply power to the first voltage stabilization module, detects a voltage stabilization value of the second voltage stabilization module according to a second overvoltage threshold and a second undervoltage threshold, and controls the third voltage stabilization module to supply power to the second voltage stabilization module during overvoltage or undervoltage. According to the power management control circuit based on the MCU, the power supply safety of the MCU module can be improved, and voltage-stabilized power supply can be maintained.

Description

Technical Field

[0001] This invention relates to the field of power management technology, specifically a power management control circuit based on an MCU. Background Technology

[0002] Traditional power management circuits are typically constructed from voltage regulators, resistors, capacitors, etc., and can provide a fixed amount of regulated power. However, they have fixed functions, poor flexibility, and cannot automatically adjust the output voltage. Furthermore, when the provided voltage becomes abnormal, they cannot link with surrounding voltage regulators to maintain regulated power supply. Therefore, they need improvement. Summary of the Invention

[0003] This invention provides a power management control circuit based on an MCU to solve the problems mentioned in the background art.

[0004] According to an embodiment of the present invention, a power management control circuit based on an MCU is provided, comprising: The power module is used to provide DC power. The first voltage regulator module is connected to the power supply module and the power management module. It is used to regulate the voltage of DC power or power transmitted by the power management module and output the first power. The second voltage regulator module is connected to the power supply module and the power management module. It is used to regulate the voltage of DC power or power transmitted by the power management module and output the second power. The status detection module is connected to the first voltage regulator module and the second voltage regulator module. It is used to output a first detection signal when the first electrical energy is greater than a set first overvoltage threshold or less than a first undervoltage threshold, and to output a second detection signal when the second electrical energy is greater than a set second overvoltage threshold or less than a second undervoltage threshold. The MCU module is connected to the status detection module, the first voltage regulator module, the second voltage regulator module, and the third voltage regulator module. It is used to receive the first electrical energy and the second electrical energy, output a drive signal and control the third voltage regulator module to perform voltage regulation. When the first detection signal is received, it outputs the first management signal and controls the power management module to perform power transmission. When the second detection signal is received, it outputs the second management signal and controls the power management module to perform power transmission. The third voltage regulator module is connected to the power supply module. When it receives a drive signal, it performs voltage regulation on the DC power and outputs the third power to transmit the third power to the connected electrical equipment. The power management module, connected to the third voltage regulator module, is used to transmit third electrical energy to the first voltage regulator module when receiving the first management signal, and to transmit third electrical energy to the second voltage regulator module when receiving the second management signal.

[0005] As a further embodiment of the present invention: the power supply module includes a DC power supply and a first capacitor; the first voltage regulator module includes a first resistor, a first power transistor, a first voltage regulator and a second capacitor; the MCU module includes a first controller; Preferably, the first terminal of the DC power supply is connected to the source of the first power transistor and connected to the second terminal of the DC power supply, the second terminal of the first voltage regulator, and the second terminal of the second capacitor through the first capacitor. The third terminal of the first voltage regulator is connected to the first terminal of the second capacitor and the VCC1 terminal of the first controller. The gate of the first power transistor is connected to the IO3 terminal of the first controller and grounded through the first resistor. The drain of the first power transistor is connected to the first terminal of the first voltage regulator.

[0006] As a further embodiment of the present invention: the second voltage regulator module includes a second power transistor, a second resistor, a second voltage regulator, and a third capacitor; Preferably, the source of the second power transistor is connected to the first terminal of the DC power supply, the drain of the second power transistor is connected to the third terminal of the second voltage regulator, the second terminal of the second voltage regulator is connected to the VCC2 terminal of the first controller and the first terminal of the third capacitor, and the gate of the second power transistor is connected to the IO2 terminal of the first controller and connected to the second terminal of the DC power supply, the first terminal of the second voltage regulator and the second terminal of the third capacitor through the second resistor.

[0007] As a further embodiment of the present invention: the third voltage regulator module includes a third resistor, a fourth resistor, a first inductor, a third voltage regulator, a fourth capacitor, a first diode, a third power transistor, a fifth resistor, a fifth capacitor, a sixth capacitor, a second inductor, and a load interface; Preferably, one end of the third resistor is connected to the sixth terminal of the third voltage regulator and the first terminal of the DC power supply; the other end of the third resistor is connected to the seventh terminal of the third voltage regulator and one end of the first inductor, and is connected to the eighth terminal of the third voltage regulator through the third resistor; the other end of the first inductor is connected to the anode of the first diode and the first terminal of the third voltage regulator; the cathode of the first diode is connected to the fifth terminal of the third voltage regulator, the drain of the third power transistor, and one end of the fifth capacitor, and is connected to the first terminal of the sixth capacitor and the first terminal of the load interface through the second inductor; the second and fourth terminals of the third voltage regulator are both connected to one end of the fifth resistor, the other end of the fifth capacitor, the second end of the sixth capacitor, the second terminal of the load interface, and the second terminal of the DC power supply; the third terminal of the third voltage regulator is grounded through the fourth capacitor; the source of the third power transistor is connected to the other end of the fifth resistor; and the gate of the third power transistor is connected to the IO1 terminal of the first controller.

[0008] As a further embodiment of the present invention: the power management module includes a fourth power transistor and a fifth power transistor; Preferably, the drain of the fourth power transistor is connected to the drain of the fifth power transistor and the first terminal of the sixth capacitor, the source of the fourth power transistor and the source of the fifth power transistor are respectively connected to the third terminal of the second voltage regulator and the first terminal of the first voltage regulator, and the gate of the fourth power transistor and the gate of the fifth power transistor are respectively connected to the IO2 terminal and the IO3 terminal of the first controller.

[0009] As a further embodiment of the present invention: the state detection module includes a sixth resistor, a seventh resistor, a first reference power supply, a second reference power supply, a first comparator, and a second comparator; Preferably, one end of the sixth resistor is connected to the first end of the second capacitor, and the other end of the sixth resistor is connected to the inverting input of the first comparator and the non-inverting input of the second comparator, and is connected to the second end of the second capacitor through the seventh resistor. The outputs of the first comparator and the second comparator are both connected to the IO4 terminal of the first controller.

[0010] As a further embodiment of the present invention: the power management module further includes a first detection device; Preferably, the first input terminal and the second input terminal of the first detection device are respectively connected to the first terminal and the second terminal of the third capacitor, and the output terminal of the first detection device is connected to the IO5 terminal of the first controller.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The power management control circuit based on the MCU of the present invention can perform voltage regulation on the DC power provided by the power module by the first voltage regulator module and the second voltage regulator module, so as to provide the MCU module with two different sets of regulated voltage values. The MCU module controls the third voltage regulator module to perform voltage regulation and supply power to the connected electrical equipment. The status detection module detects the regulated voltage value status provided by the first voltage regulator module according to the set first overvoltage threshold and the first undervoltage threshold. When overvoltage or undervoltage occurs, the power management module controls the third voltage regulator module to supply power to the first voltage regulator module. The power management module detects the regulated voltage value status of the second voltage regulator module according to the second overvoltage threshold and the second undervoltage threshold, and controls the third voltage regulator module to supply power to the second voltage regulator module when overvoltage or undervoltage occurs. This improves the power supply safety of the MCU module and maintains regulated power supply. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic block diagram of a power management control circuit based on an MCU provided for an embodiment of the present invention; Figure 2 A circuit diagram of a power management control circuit based on an MCU provided for an embodiment of the present invention; Figure 3 The circuit diagram is provided for the state detection module in an embodiment of the present invention. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] In one embodiment, see Figure 1 A power management control circuit based on an MCU, comprising: Specifically, power module 1 is used to provide DC power; The first voltage regulator module 2 is connected to the power supply module 1 and the power management module 7, and is used to regulate the DC power or the power transmitted by the power management module 7 and output the first power. The second voltage regulator module 3 is connected to the power supply module 1 and the power management module 7, and is used to regulate the DC power or the power transmitted by the power management module 7 and output the second power. The status detection module 4 is connected to the first voltage regulator module 2 and the second voltage regulator module 3. It is used to output a first detection signal when the first electrical energy is greater than the set first overvoltage threshold or less than the first undervoltage threshold, and to output a second detection signal when the second electrical energy is greater than the set second overvoltage threshold or less than the second undervoltage threshold. MCU module 5 is connected to state detection module 4, first voltage regulator module 2, second voltage regulator module 3 and third voltage regulator module 6. It is used to receive first electrical energy and second electrical energy, output drive signals and control the third voltage regulator module 6 to perform voltage regulation. When it receives the first detection signal, it outputs the first management signal and controls the power management module 7 to perform power transmission. When it receives the second detection signal, it outputs the second management signal and controls the power management module 7 to perform power transmission. The third voltage regulator module 6 is connected to the power supply module 1. When it receives the drive signal, it performs voltage regulation on the DC power and outputs the third power to transmit the third power to the connected electrical equipment. The power management module 7 is connected to the third voltage regulator module 6 and is used to transmit the third power to the first voltage regulator module 2 when receiving the first management signal, and to transmit the third power to the second voltage regulator module 3 when receiving the second management signal.

[0016] In a specific embodiment, the power supply module 1 can be a power supply circuit composed of a DC power supply and a capacitor to provide DC power; the first voltage regulator module 2 can be a first voltage regulator circuit composed of a field-effect transistor, a voltage regulator, a capacitor, etc., which can perform power transmission control and voltage regulation control to provide the 5V voltage required by the MCU module 5; the second voltage regulator module 3 can be a second voltage regulator circuit composed of a field-effect transistor, a voltage regulator, a capacitor, etc., which can perform power transmission control and voltage regulation control to provide the 3.3V voltage required by the MCU module 5; the state detection module 4 can be a state detection circuit composed of a resistor, a comparator, a first detection device, a reference power supply, etc., which can set a first overvoltage threshold and a first undervoltage threshold and compare them with the voltage of the first power output by the first voltage regulator module 2 to determine whether the first power is overvoltage or undervoltage. The first undervoltage threshold... If the value is less than the first electrical energy and the first overvoltage threshold is greater than the first electrical energy, a second overvoltage threshold and a second undervoltage threshold are set and compared with the voltage of the second electrical energy output by the second voltage regulator module 3 to determine whether the second electrical energy is overvoltage or undervoltage. The second undervoltage threshold is less than the second electrical energy and the second overvoltage threshold is greater than the second electrical energy. The MCU module 5 can be an MCU circuit composed of MCU devices, integrating many components such as an arithmetic unit, a controller, a memory, and input / output devices to realize functions such as signal processing, data storage, module control, and timing control. The third voltage regulator module 6 can be a third voltage regulator circuit composed of voltage regulators, inductors, field-effect transistors, capacitors, etc., which can be controlled by the MCU module 5 and perform voltage regulation. The power management module 7 can be a power management circuit composed of field-effect transistors, etc., to control the power transmission status.

[0017] In this embodiment, please refer to Figure 2 and Figure 3 The power supply module 1 includes a DC power supply and a first capacitor C1; the first voltage regulator module 2 includes a first resistor R1, a first power transistor Q1, a first voltage regulator IC1, and a second capacitor C2; the MCU module 5 includes a first controller U1. Specifically, the first terminal of the DC power supply is connected to the source of the first power transistor Q1 and is connected to the second terminal of the DC power supply, the second terminal of the first voltage regulator IC1, and the second terminal of the second capacitor C2 through the first capacitor C1. The third terminal of the first voltage regulator IC1 is connected to the first terminal of the second capacitor C2 and the VCC1 terminal of the first controller U1. The gate of the first power transistor Q1 is connected to the IO3 terminal of the first controller U1 and is grounded through the first resistor R1. The drain of the first power transistor Q1 is connected to the first terminal of the first voltage regulator IC1.

[0018] In a specific embodiment, the first power transistor Q1 can be a P-channel MOSFET; the first voltage regulator IC1 can be an LM2940 voltage regulator; and the first controller U1 can be composed of an MCU device.

[0019] Furthermore, the second voltage regulator module 3 includes a second power transistor Q2, a second resistor R2, a second voltage regulator IC2, and a third capacitor C3; Specifically, the source of the second power transistor Q2 is connected to the first terminal of the DC power supply, the drain of the second power transistor Q2 is connected to the third terminal of the second voltage regulator IC2, the second terminal of the second voltage regulator IC2 is connected to the VCC2 terminal of the first controller U1 and the first terminal of the third capacitor C3, and the gate of the second power transistor Q2 is connected to the IO2 terminal of the first controller U1 and connected to the second terminal of the DC power supply, the first terminal of the second voltage regulator IC2 and the second terminal of the third capacitor C3 through the second resistor R2.

[0020] In a specific embodiment, the second voltage regulator IC2 can be an AS1117 voltage regulator; the second power transistor Q2 can be a P-channel MOSFET.

[0021] Furthermore, the third voltage regulator module 6 includes a third resistor R3, a fourth resistor R4, a first inductor L1, a third voltage regulator IC3, a fourth capacitor C4, a first diode D1, a third power transistor Q3, a fifth resistor R5, a fifth capacitor C5, a sixth capacitor C6, a second inductor L2, and a load interface. Specifically, one end of the third resistor R3 is connected to the sixth terminal of the third voltage regulator IC3 and the first terminal of the DC power supply. The other end of the third resistor R3 is connected to the seventh terminal of the third voltage regulator IC3 and one end of the first inductor L1, and is connected to the eighth terminal of the third voltage regulator IC3 through the third resistor. The other end of the first inductor L1 is connected to the anode of the first diode D1 and the first terminal of the third voltage regulator IC3. The cathode of the first diode D1 is connected to the fifth terminal of the third voltage regulator IC3, the drain of the third power transistor Q3, and one end of the fifth capacitor C5, and is connected to the first terminal of the sixth capacitor C6 and the first terminal of the load interface through the second inductor L2. The second and fourth terminals of the third voltage regulator IC3 are both connected to one end of the fifth resistor R5, the other end of the fifth capacitor C5, the second end of the sixth capacitor C6, the second terminal of the load interface, and the second terminal of the DC power supply. The third terminal of the third voltage regulator IC3 is grounded through the fourth capacitor C4. The source of the third power transistor Q3 is connected to the other end of the fifth resistor R5, and the gate of the third power transistor Q3 is connected to the IO1 terminal of the first controller U1.

[0022] In a specific embodiment, the third voltage regulator IC3 can be an MC34063 voltage regulator with a wide input voltage range; the third power transistor Q3 can be an N-channel MOSFET. By controlling the conduction state, the voltage of the signal input to the fifth terminal of the third voltage regulator IC3 is adjusted, thereby realizing the output voltage regulation of the third voltage regulator IC3.

[0023] Furthermore, the power management module 7 includes a fourth power transistor Q4 and a fifth power transistor Q5; Specifically, the drain of the fourth power transistor Q4 is connected to the drain of the fifth power transistor Q5 and the first terminal of the sixth capacitor C6. The source of the fourth power transistor Q4 and the source of the fifth power transistor Q5 are respectively connected to the third terminal of the second voltage regulator IC2 and the first terminal of the first voltage regulator IC1. The gate of the fourth power transistor Q4 and the gate of the fifth power transistor Q5 are respectively connected to the IO2 terminal and the IO3 terminal of the first controller U1. In a specific embodiment, both the fifth power transistor Q5 and the fourth power transistor Q4 can be N-channel field-effect transistors.

[0024] Furthermore, the state detection module 4 includes a sixth resistor R6, a seventh resistor R7, a first reference power supply VF1, a second reference power supply VF2, a first comparator A1, and a second comparator A2; Specifically, one end of the sixth resistor R6 is connected to the first end of the second capacitor C2, and the other end of the sixth resistor R6 is connected to the inverting input of the first comparator A1 and the non-inverting input of the second comparator A2, and is connected to the second end of the second capacitor C2 through the seventh resistor R7. The outputs of the first comparator A1 and the second comparator A2 are both connected to the IO4 terminal of the first controller U1.

[0025] In a specific embodiment, both the first comparator A1 and the second comparator A2 can be selected as LM358 comparators; the first reference power supply VF1 and the second reference power supply VF2 respectively provide a first undervoltage threshold and a first overvoltage threshold.

[0026] Furthermore, the power management module 7 also includes a first detection device; Specifically, the first input terminal and the second input terminal of the first detection device are respectively connected to the first terminal and the second terminal of the third capacitor C3, and the output terminal of the first detection device is connected to the IO5 terminal of the first controller U1.

[0027] In a specific embodiment, the circuit structure of the first detection device is the same as that of the sixth resistor R6, the seventh resistor R7, the first reference power supply VF1, the second reference power supply VF2, the first comparator A1 and the second comparator A2, and provides a second undervoltage threshold and a second overvoltage threshold.

[0028] In this embodiment, a power management control circuit based on an MCU provides DC power. A first power transistor Q1 and a second power transistor Q2 transmit power and regulate the voltage of a first voltage regulator IC1 and a second voltage regulator IC2, respectively, outputting first and second electrical energy. These outputs power to the VCC1 and VCC2 terminals of a first controller U1, respectively. The IO1 terminal of the first controller U1 adjusts the conduction state of the third power transistor Q3, thereby controlling the third voltage regulator IC3 in conjunction with a third resistor R3, a fourth resistor R4, a first inductor L1, a fourth capacitor C4, a fifth resistor R5, and a first diode D1 to perform voltage regulation and output the third electrical energy. This third electrical energy is filtered by the fifth capacitor C5, a sixth capacitor C6, and the second inductor L2 before powering the electrical equipment connected to the load interface. The first electrical energy is sampled by a voltage divider using a sixth resistor R6 and a seventh resistor R7. The sampled signal is then compared by a first comparator A1 and a second comparator A2. When the sampled signal is less than the first undervoltage threshold provided by the first reference power supply VF1, the first comparator A1 outputs a high level. When the sampled signal is greater than the first overvoltage threshold provided by the second reference power supply VF2, the second comparator A2 outputs a high level. Both are interfaced through the IO4 terminal of the first controller U1, indicating that the DC power is fluctuating or the first power transistor Q1 is abnormal. This causes the IO3 terminal of the first controller U1 to output a first management signal and turn off the first power transistor Q1, controlling the fifth power transistor Q5 to turn on, transferring the third power to the first voltage regulator IC1 for voltage regulation, maintaining the voltage regulation operation of the first voltage regulator IC1. Similarly, the first detection device detects whether the second power is overvoltage or undervoltage according to the set second overvoltage threshold and second undervoltage threshold. When there is overvoltage or undervoltage, the IO2 terminal of the first controller U1 controls the second power transistor Q2 to turn off and controls the fourth power transistor Q4 to turn on, transferring the third power to the second voltage regulator IC2, maintaining the voltage regulation operation of the second voltage regulator IC2.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power management control circuit based on an MCU, characterized in that, The circuit includes: The power module is used to provide DC power. The first voltage regulator module is connected to the power supply module and the power management module. It is used to regulate the voltage of DC power or power transmitted by the power management module and output the first power. The second voltage regulator module is connected to the power supply module and the power management module. It is used to regulate the voltage of DC power or power transmitted by the power management module and output the second power. The status detection module is connected to the first voltage regulator module and the second voltage regulator module. It is used to output a first detection signal when the first electrical energy is greater than a set first overvoltage threshold or less than a first undervoltage threshold, and to output a second detection signal when the second electrical energy is greater than a set second overvoltage threshold or less than a second undervoltage threshold. The MCU module is connected to the status detection module, the first voltage regulator module, the second voltage regulator module, and the third voltage regulator module. It is used to receive the first electrical energy and the second electrical energy, output a drive signal and control the third voltage regulator module to perform voltage regulation. When the first detection signal is received, it outputs the first management signal and controls the power management module to perform power transmission. When the second detection signal is received, it outputs the second management signal and controls the power management module to perform power transmission. The third voltage regulator module is connected to the power supply module. When it receives a drive signal, it performs voltage regulation on the DC power and outputs the third power to transmit the third power to the connected electrical equipment. The power management module, connected to the third voltage regulator module, is used to transmit third electrical energy to the first voltage regulator module when receiving the first management signal, and to transmit third electrical energy to the second voltage regulator module when receiving the second management signal.

2. The MCU-based power management control circuit according to claim 1, characterized in that, The power supply module includes a DC power supply and a first capacitor; the first voltage regulator module includes a first resistor, a first power transistor, a first voltage regulator, and a second capacitor; the MCU module includes a first controller; The first terminal of the DC power supply is connected to the source of the first power transistor and is connected to the second terminal of the DC power supply, the second terminal of the first voltage regulator, and the second terminal of the second capacitor through the first capacitor. The third terminal of the first voltage regulator is connected to the first terminal of the second capacitor and the VCC1 terminal of the first controller. The gate of the first power transistor is connected to the IO3 terminal of the first controller and is grounded through the first resistor. The drain of the first power transistor is connected to the first terminal of the first voltage regulator.

3. The MCU-based power management control circuit according to claim 2, characterized in that, The second voltage regulator module includes a second power transistor, a second resistor, a second voltage regulator, and a third capacitor; The source of the second power transistor is connected to the first terminal of the DC power supply, the drain of the second power transistor is connected to the third terminal of the second voltage regulator, the second terminal of the second voltage regulator is connected to the VCC2 terminal of the first controller and the first terminal of the third capacitor, and the gate of the second power transistor is connected to the IO2 terminal of the first controller and connected to the second terminal of the DC power supply, the first terminal of the second voltage regulator and the second terminal of the third capacitor through the second resistor.

4. The MCU-based power management control circuit according to claim 3, characterized in that, The third voltage regulator module includes a third resistor, a fourth resistor, a first inductor, a third voltage regulator, a fourth capacitor, a first diode, a third power transistor, a fifth resistor, a fifth capacitor, a sixth capacitor, a second inductor, and a load interface. One end of the third resistor is connected to the sixth terminal of the third voltage regulator and the first terminal of the DC power supply. The other end of the third resistor is connected to the seventh terminal of the third voltage regulator and one end of the first inductor, and is connected to the eighth terminal of the third voltage regulator through the third resistor. The other end of the first inductor is connected to the anode of the first diode and the first terminal of the third voltage regulator. The cathode of the first diode is connected to the fifth terminal of the third voltage regulator, the drain of the third power transistor, and one end of the fifth capacitor, and is connected to the first terminal of the sixth capacitor and the first terminal of the load interface through the second inductor. The second and fourth terminals of the third voltage regulator are both connected to one end of the fifth resistor, the other end of the fifth capacitor, the second end of the sixth capacitor, the second terminal of the load interface, and the second terminal of the DC power supply. The third terminal of the third voltage regulator is grounded through the fourth capacitor. The source of the third power transistor is connected to the other end of the fifth resistor, and the gate of the third power transistor is connected to the IO1 terminal of the first controller.

5. The MCU-based power management control circuit according to claim 4, characterized in that, The power management module includes a fourth power transistor and a fifth power transistor; The drain of the fourth power transistor is connected to the drain of the fifth power transistor and the first terminal of the sixth capacitor. The source of the fourth power transistor and the source of the fifth power transistor are respectively connected to the third terminal of the second voltage regulator and the first terminal of the first voltage regulator. The gate of the fourth power transistor and the gate of the fifth power transistor are respectively connected to the IO2 terminal and the IO3 terminal of the first controller.

6. The MCU-based power management control circuit according to claim 5, characterized in that, The state detection module includes a sixth resistor, a seventh resistor, a first reference power supply, a second reference power supply, a first comparator, and a second comparator. One end of the sixth resistor is connected to the first end of the second capacitor, and the other end of the sixth resistor is connected to the inverting input of the first comparator and the non-inverting input of the second comparator, and is connected to the second end of the second capacitor through the seventh resistor. The outputs of the first comparator and the second comparator are both connected to the IO4 terminal of the first controller.

7. The MCU-based power management control circuit according to claim 6, characterized in that, The power management module also includes a first detection device; The first input terminal and the second input terminal of the first detection device are respectively connected to the first terminal and the second terminal of the third capacitor, and the output terminal of the first detection device is connected to the IO5 terminal of the first controller.

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