Power supply main control board and mobile power supply

Abstract

The utility model discloses a power supply main control board and a mobile power supply, and relates to the technical field of mobile power supplies, the power supply main control board comprises a plurality of first interface circuits, a first voltage conversion circuit and a second interface circuit; each first interface circuit is connected to a first voltage conversion circuit; the first interface circuit comprises a first connector; the first connector comprises a power supply pin, a data pin and a configuration channel pin; the power supply pin is connected to the output end of the first voltage conversion circuit; the first voltage conversion circuit comprises a first power supply input and control module, a first power supply conversion module and a first filtering module; the first power supply input and control module is connected to the first power supply conversion module; the first power supply conversion module is connected to the first filtering module; through the reasonable circuit module design and connection mode, the performance and reliability of the outdoor mobile power supply are improved, and the diversified requirements of users in different scenes are met.

Description

Technical Field

[0001] This utility model relates to the field of mobile power technology, and in particular to a power control board and a mobile power supply. Background Technology

[0002] With outdoor sports becoming increasingly popular and emergency scenarios such as natural disasters and sudden power outages occurring frequently, outdoor portable power banks have become an important piece of equipment for people's outdoor activities and emergency response due to their portability and power supply function.

[0003] In today's society, outdoor sports are gradually becoming a popular lifestyle, with more and more people enjoying outdoor activities such as hiking, camping, and adventure. These activities are usually far from traditional power supply facilities, making the demand for portable power supplies extremely urgent. At the same time, natural disasters (such as earthquakes, floods, typhoons, etc.) and sudden power outages also occur frequently. In these situations, power supply interruptions severely impact people's normal lives and work, making emergency power supply equipment that can provide a stable power output crucial.

[0004] Outdoor portable power banks, as devices that combine portability and power supply, perfectly meet the power needs of outdoor activities and emergency scenarios. They can charge various electronic devices such as mobile phones, tablets, cameras, and lighting fixtures, ensuring their normal operation and providing convenience for people's lives and work.

[0005] However, current outdoor portable power banks on the market still have some shortcomings in circuit design and functionality. For example, their power conversion efficiency is low, resulting in insufficient utilization of battery energy; their interface compatibility is poor, failing to meet the charging needs of various devices; their circuit stability is unsatisfactory, making them prone to failure in complex environments; and they lack comprehensive protection mechanisms, making it difficult to effectively deal with issues such as static electricity, overcurrent, and overvoltage, which may damage the equipment and the user.

[0006] To improve the performance and reliability of outdoor portable power supplies and meet the diverse needs of users in different scenarios, it is of great practical significance to research and design a power control board that is efficient, stable, and has multiple protection functions. Utility Model Content

[0007] The purpose of this utility model is to provide a power control board and a portable power bank, which improves the performance and reliability of outdoor portable power banks through reasonable circuit module design and connection methods, and meets the diverse needs of users in different scenarios.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] In a first aspect, this application provides a power supply main control board, comprising:

[0010] Multiple first interface circuits and first voltage conversion circuits; each first interface circuit is connected to a first voltage conversion circuit.

[0011] The first interface circuit includes a first connector; the first connector includes a power pin, a data pin, and a configuration channel pin; the power pin is connected to the output of a first voltage conversion circuit; the data pin is connected to an external data transmission line; and the configuration channel pin is used for power supply negotiation.

[0012] The first voltage conversion circuit includes a first power input and control module, a first power conversion module, and a first filter module; the first power input and control module is connected to the first power conversion module; the first power conversion module is connected to the first filter module.

[0013] The first power conversion module includes a first power management chip; the positive terminal of the battery is connected to the first power input and control module, and after being controlled by the field-effect transistor and transistor of the first power input and control module, it is input to the input pin of the first power management chip through a filter capacitor; the first power management chip and an inductor work together to complete voltage conversion, and the converted voltage is output through the output pin of the first power management chip, and after being filtered by the first filter module, a stable output voltage is obtained; the output voltage serves as the power supply for the first interface circuit; the configuration channel pin of the first power management chip is connected to the configuration channel pin of the first connector for power supply negotiation with the external device connected to the first interface.

[0014] Preferably, the first voltage conversion circuit includes:

[0015] The positive terminal of the battery is connected to the relevant pin of the field-effect transistor and also to the first resistor. The other end of the first resistor is connected to the second resistor and then grounded. The output terminal of the field-effect transistor is connected to a capacitor and then to the input pin of the first power management chip to provide it with input power.

[0016] The first control signal is connected to the base of the transistor via the third resistor. The emitter of the transistor is grounded, and the collector is connected to a control pin of the field-effect transistor. One end of the fourth resistor is connected to the base of the field-effect transistor, and the other end is grounded. It is used to control the state of the transistor, and thus control the field-effect transistor.

[0017] The BST pin of the first power management chip is connected to a capacitor, the SW pin is connected to an inductor, then to a filter capacitor and a fifth resistor, and finally to the voltage output terminal; the voltage is output through the output pin of the first power management chip.

[0018] Preferably, the first interface is a Type-C interface, and the power supply motherboard includes four Type-C interface circuits.

[0019] Preferably, the power supply main control board further includes a first voltage divider circuit. The input terminal of the first voltage divider circuit is connected to the first voltage conversion circuit. After voltage division by the voltage divider resistor, a voltage signal is obtained and fed back to the output voltage of the first voltage conversion circuit.

[0020] Preferably, the first interface circuit further includes a first status monitoring module for monitoring the power supply and operating status of the first interface.

[0021] Preferably, the power supply main control board further includes a second interface circuit, which includes a second power input and control module, a second power conversion module, and a second filtering module. The second power conversion module includes a second power management chip. The second power input and control module is connected to the second power conversion module. The second power conversion module is connected to the second filtering module. The output terminal of the second filtering module is connected to the VBUS pin of the second interface. The second interface is a USB interface.

[0022] Preferably, the second power conversion module includes two second power management chips; the two second power management chips convert the output power to power the second interface.

[0023] Preferably, the second power input and control module includes a voltage divider resistor, a transistor, and a field-effect transistor; the positive terminal of the battery is connected to the relevant pin of the field-effect transistor and also connected to the sixth resistor, the other end of the sixth resistor is connected to the seventh resistor and then grounded; the output terminal of the field-effect transistor is connected to a filter capacitor and then to the input pins of two second power management chips respectively; the second power management chips and inductors work together to complete voltage conversion;

[0024] The converted voltage is filtered by the inductor and multiple capacitors of the second filter module to output a stable output voltage, which is then connected to the VBUS pin of the corresponding USB interface.

[0025] Preferably, the power supply main control board further includes a second current monitoring circuit for monitoring the current of the second interface, including:

[0026] The USB interface leads are connected to the eighth resistor and then in series with the ninth resistor. A monitoring line is led out at the midpoint between the eighth and ninth resistors to output the monitoring signal.

[0027] Secondly, this application provides a portable power bank, including any of the power control boards described in this application.

[0028] Compared with existing technologies, the beneficial effects of this utility model include at least the following: It possesses multiple Type-C interface circuits and USB interface circuits. The Type-C interface is compatible with various digital products; the USB interface further expands the compatibility range, facilitating the connection of various USB devices and improving the versatility of the power supply main control board. The first and second voltage conversion circuits, respectively, work with inductors, capacitors, and other components through a power management chip to accurately complete voltage conversion. Simultaneously, the filtering module effectively filters out noise and ripple, outputting a stable and clean voltage, providing reliable power supply to the device, reducing damage caused by voltage instability, and extending the device's lifespan. The first power management chip is connected to the configuration channel pin of the first connector through a configuration channel pin, enabling power supply negotiation with connected external devices, automatically matching the required power supply voltage and current, achieving intelligent power supply, improving power utilization efficiency, and avoiding unnecessary energy loss. The first interface circuit is equipped with a first status monitoring module, which can monitor the power supply and operating status of the interface in real time, such as voltage, current, and connection status. This allows users to promptly understand the operating status of the power supply main control board and connected devices, and quickly troubleshoot and resolve problems in case of abnormalities. Both the first and second interface circuits are equipped with interface protection modules. Built-in electrostatic discharge (ESD) protection components effectively prevent damage to the interfaces and connected devices from static electricity. Furthermore, the voltage divider circuit provides feedback on the output voltage, helping to promptly detect overvoltage issues and ensuring the safe and stable operation of the circuits and equipment. The power input and control module, through a circuit composed of MOSFETs, transistors, and related resistors, precisely controls the power supply based on control signals. This not only cuts off power when not needed, saving energy, but also promptly cuts off power in case of circuit abnormalities, providing protection. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the power supply main control board structure according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the first interface circuit of this utility model embodiment;

[0031] Figure 3 This is a schematic diagram of the first voltage divider circuit according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the first voltage conversion circuit structure according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the second interface circuit structure according to an embodiment of the present utility model;

[0034] Figure 6 This is a schematic diagram of the structure of the second power input and control module according to an embodiment of the present invention;

[0035] Figure 7 This is a partial structural diagram of the second interface circuit according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the second voltage divider circuit structure according to an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the second current monitoring circuit structure according to an embodiment of the present invention. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0039] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. The described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, this application covers any alternatives, modifications, equivalent methods and solutions made within the spirit, principles and scope of this application as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0041] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0042] Example 1: This example provides a power supply main control board, including:

[0043] Multiple first interface circuits and first voltage conversion circuits; each first interface circuit is connected to a first voltage conversion circuit.

[0044] The first interface circuit includes a first connector; the first connector includes a power pin, a data pin, and a configuration channel pin; the power pin is connected to the output of a first voltage conversion circuit; the data pin is connected to an external data transmission line; and the configuration channel pin is used for power supply negotiation.

[0045] The first voltage conversion circuit includes a first power input and control module, a first power conversion module, and a first filter module; the first power input and control module is connected to the first power conversion module; the first power conversion module is connected to the first filter module.

[0046] The first power conversion module includes a first power management chip; the positive terminal of the battery is connected to the first power input and control module, and after being controlled by the field-effect transistor and transistor of the first power input and control module, it is input to the input pin of the first power management chip through a filter capacitor; the first power management chip and an inductor work together to complete voltage conversion, and the converted voltage is output through the output pin of the first power management chip, and after being filtered by the first filter module, a stable output voltage is obtained; the output voltage serves as the power supply for the first interface circuit; the configuration channel pin of the first power management chip is connected to the configuration channel pin of the first connector for power supply negotiation with the external device connected to the first interface.

[0047] In one possible implementation, the first voltage conversion circuit includes:

[0048] The positive terminal of the battery is connected to the relevant pin of the field-effect transistor and also to the first resistor. The other end of the first resistor is connected to the second resistor and then grounded. The output terminal of the field-effect transistor is connected to a capacitor and then to the input pin of the first power management chip to provide it with input power.

[0049] The first control signal is connected to the base of the transistor via the third resistor. The emitter of the transistor is grounded, and the collector is connected to a control pin of the field-effect transistor. One end of the fourth resistor is connected to the base of the field-effect transistor, and the other end is grounded. It is used to control the state of the transistor, and thus control the field-effect transistor.

[0050] The BST pin of the first power management chip is connected to a capacitor, the SW pin is connected to an inductor, then to a filter capacitor and a fifth resistor, and finally to the voltage output terminal; the voltage is output through the output pin of the first power management chip.

[0051] In one possible implementation, the first interface is a Type-C interface, and the power supply motherboard includes four Type-C interface circuits; through the Type-C interface, it is possible to charge various digital products (such as mobile phones, tablets, etc.) that use Type-C interface chargers;

[0052] In one possible implementation, the power supply main control board further includes a first voltage divider circuit. The input terminal of the first voltage divider circuit is connected to the first voltage conversion circuit. After voltage division by the voltage divider resistor, a voltage signal is obtained and fed back to the output voltage of the first voltage conversion circuit.

[0053] In one possible implementation, the first interface circuit further includes a first status monitoring module for monitoring the power supply and operating status of the first interface.

[0054] In one possible implementation, the first interface circuit further includes an interface protection module, the output voltage is connected to the interface protection module, and the interface protection module includes an electrostatic discharge (ESD) protection element, which is grounded.

[0055] The working principle of the above technical solution is as follows:

[0056] The power control board includes multiple first interface circuits and first voltage conversion circuits for managing the input, conversion and output of the power supply; each first interface circuit is connected to a first voltage conversion circuit; multiple first interface circuits and corresponding first voltage conversion circuits work together to provide charging and data transmission services for multiple digital products using Type-C interfaces at the same time;

[0057] The Type-C interface of the first interface circuit has a power pin that receives a stable output voltage to charge connected digital products; a data pin that connects to an external data transmission line to enable data transmission; and a configuration channel pin for power supply negotiation with the device. In addition, the first status monitoring module monitors the interface's power supply and operating status in real time, such as voltage, current, and connection status.

[0058] The first interface circuit includes a first connector.

[0059] The first connector is a USB Type-C connector with the following pins:

[0060] Power supply pin (USBC1_V): Connected to the output of the first voltage conversion circuit to receive the converted stable voltage.

[0061] Data pins (TX1+ / -, RX1+ / -, D+ / -): Connect to external data transmission lines, supporting USB 2.0 and USB 3.0 data transmission.

[0062] Configuration channel pins (CC1, CC2): used to detect connection status and power role, support USB PowerDelivery (PD) protocol, and realize power negotiation.

[0063] The first power input and control module receives the battery input voltage and controls it via a field-effect transistor (Q13) and a transistor (Q14). Power from the battery's positive terminal enters the first power input and control module. The field-effect transistor and its surrounding first and second resistors form a voltage divider circuit for preliminary processing of the input voltage. Simultaneously, a first control signal is transmitted to the transistor's base via a third resistor, working in conjunction with a fourth resistor to control the transistor's state, thereby controlling the field-effect transistor's conduction and cutoff, determining whether to supply power to subsequent circuits. When the control signal meets the conditions, the field-effect transistor conducts, and the power is input to the first power management chip after passing through a filter capacitor. Specifically, this includes:

[0064] Battery positive terminal connection: The battery positive terminal (BAT+) is connected to the relevant pin of the field-effect transistor Q13, and is also connected to the first resistor R103. The other end of the first resistor R103 is connected to the second resistor R105 and then grounded. The battery positive terminal (BAT+) controls the conduction and cutoff of MOSFET Q13 through the voltage divider of resistors R103 and R105 to prevent reverse current.

[0065] The control signal C1_30W_EN is connected to the base of transistor Q14 via the third resistor R106. The emitter of Q14 is grounded, and the collector is connected to a control pin of Q13. One end of the fourth resistor R107 is connected to the base of Q14, and the other end is grounded. It is used to control the state of transistor Q14, and thus control the field-effect transistor Q13. By controlling the base of NPN transistor Q14 through resistors R106 and R107, the enable of DC-DC converter chip IC3 is controlled, realizing on-demand power supply.

[0066] The first power conversion module's core component is the DC-DC converter chip IC3 (SW3522-30W, the first power management chip), responsible for converting the input voltage to 5V, 9V, or 12V output. The first power management chip, in conjunction with internal circuitry and external components such as inductors and capacitors, performs voltage conversion on the input power. The chip stores and releases electrical energy through the capacitor connected to the BST pin and the inductor connected to the SW pin, achieving voltage transformation and outputting the required voltage. During this process, the power management chip also connects to the configuration channel pin of the first connector (Type-C interface) via the configuration channel pin to negotiate power supply with external devices, determining the appropriate supply voltage and current. Specifically, this includes:

[0067] Input voltage (VIN): Connected to the VIN pin of IC3 through the source of Q13, and provided as a stable input voltage after being filtered by capacitors C67 and C68;

[0068] Start-up pin (BST): Connected to capacitor C66 (100nF / 25V), used to start the converter;

[0069] Switch pin (SW): Connected to inductor L4 (22uH), it performs voltage conversion by storing and releasing energy through the inductor;

[0070] Output pin (OUT): Connected to the USBC1_V pin of the USB Type-C interface, the output voltage is filtered by capacitors C69 (100uF / 25V) and C70 (100nF / 25V) and then output through the fifth resistor R104, providing a stable output voltage;

[0071] Grounding connection: The grounding pins (GND) of each device are connected to each other and grounded in a unified manner to ensure that the electrical reference point of the circuit is consistent;

[0072] USBC1_V; CC1, CC2, DP, and DM pins are connected to the corresponding external lines for power supply negotiation and data transmission.

[0073] The first filtering module includes capacitors C66, C69, C70, etc., which are used for filtering to ensure the stability of the output voltage. The converted voltage contains high-frequency noise and ripple, which enter the first filtering module. The filtering network composed of the filtering capacitors and inductors plays its role in filtering out noise and ripple, and outputting a stable and clean voltage to power the first interface circuit.

[0074] The battery positive terminal (BAT+) is connected to the VIN pin of IC3 via Q13 and related resistors, providing the input voltage. IC3 converts the input voltage to 5V, 9V, or 12V depending on the configuration and outputs it through the USBC1_V pin. The data pins (DP, DM) of the USBC1 interface are used for USB data transmission. Power negotiation with external devices is performed through the CC1 and CC2 pins to determine the output voltage. The voltage of USBC1_V is monitored in real time through a voltage divider circuit and an ADC input to ensure output stability.

[0075] The output voltage is negotiated and determined by communicating with external devices through the CC1 and CC2 pins.

[0076] USB data transfer is supported via DP and DM pins, ensuring data communication between devices.

[0077] The input terminal of the first voltage divider circuit is connected to the output terminal of the first voltage conversion circuit. The voltage signal is obtained by voltage division through the voltage divider resistor, and the output voltage status is fed back, which facilitates the system to monitor and adjust the output voltage.

[0078] The electrostatic discharge (ESD) protection element in the interface protection module is connected to the Type-C interface and grounded. When there is an ESD event, it quickly conducts the static electricity to the ground, protecting the interface and connected devices from ESD damage.

[0079] In one possible implementation, the power supply main control board further includes a second interface circuit, which includes a second power input and control module, a second power conversion module, and a second filtering module. The second power conversion module includes a second power management chip. The second power input and control module is connected to the second power conversion module. The second power conversion module is connected to the second filtering module. The output terminal of the second filtering module is connected to the VBUS pin of the second interface. The second interface is a USB interface.

[0080] In one possible implementation, the second power conversion module includes two second power management chips; the two second power management chips respectively convert the output power to power the second interface.

[0081] The second power input and control module includes voltage divider resistors, transistors, and field-effect transistors; the positive terminal of the battery is connected to the relevant pins of the field-effect transistor and also to the sixth resistor, the other end of the sixth resistor is connected to the seventh resistor and then grounded; the output terminal of the field-effect transistor is connected to a filter capacitor and then to the input pins of two second power management chips; the second power management chips and inductors work together to complete voltage conversion;

[0082] The converted voltage is filtered by the inductor and multiple capacitors of the second filter module to output a stable output voltage, which is then connected to the VBUS pin of the corresponding USB interface.

[0083] In one possible implementation, the first interface circuit further includes an interface protection module, the output voltage is connected to the interface protection module, and the interface protection module includes an electrostatic discharge (ESD) protection element, which is grounded.

[0084] The working principle of the above technical solution is as follows:

[0085] This circuit starts with the positive terminal (BAT+) of the battery as the input and mainly includes a field-effect transistor Q40 (PED3008), a transistor Q41 (2N7002), two secondary power management chips U5 and U6 (both model TM1228L), as well as multiple resistors (such as R173, R177, etc.), capacitors (such as C27, C28, etc.), inductors (L6, L1), and USB interfaces (USB1, USB2). In addition, there are electrostatic discharge (ESD) protection components ESD4 and ESD5. The two secondary power management chips (TMI2282L chips) convert the battery voltage to a stable 5V output for use by USB devices. Current-limiting resistors (such as R174, R175, R182, R195) ensure that the output current does not exceed 2500mA, protecting the USB devices and the circuitry.

[0086] The second power input and control module: BAT+ serves as the positive battery input. Through voltage division by resistors R173 and R177, it controls MOSFET Q40, which controls the power supply's on / off state. Transistor Q41, under the control of the 5V_USBA_EN signal, further controls the circuit's switching. The 5V_USBA_EN signal, via resistors R178 and R179, controls the conduction and cutoff of Q41, thereby controlling the USB interface's power switch, achieving on-demand power supply and saving energy.

[0087] Secondary power conversion module: Two secondary power management chips, U5 and U6, convert the input power (Vin) to output a stable 5V voltage (5V_USB1V+ and 5V_USB2V+) to power the USB interface. The chips, through FSW, ISET, FB pins and external resistors and capacitors, regulate and stabilize the output voltage and current. According to the specifications, this circuit has a current limit of 2500mA.

[0088] The SW pins of the two secondary power management chips U5 and U6 are connected to inductors L6 or L1, which store and release energy to complete voltage conversion. The other end of inductor L6 or L1 is connected to the VBUS pin of the USB interface, which provides a stable 5V output after filtering by C21, C93, C94, C95, C33, C104, C105, and C106.

[0089] Data transmission and power supply: The USB1 and USB2 interfaces transmit data through the D+ and D- pins respectively, and the VBUS pin provides a 5V power output to power external devices.

[0090] Electrostatic discharge (ESD) protection: ESD4 and ESD5 are connected to USB1 and USB2 interfaces respectively to prevent electrostatic discharge from damaging the circuits and connected devices.

[0091] Filtering and stabilization: The numerous capacitors and inductors in the circuit play a role in filtering and stabilizing the voltage, removing high-frequency noise from the power supply, and ensuring the stability of the output voltage.

[0092] The positive terminal BAT+ of the power supply is connected to the sixth resistor R173 and pin 1 of Q40; the other end of R173 is connected to the seventh resistor R177 and pin 2 of Q40; the other end of R177 is grounded. The output at pin 8 of Q40 is connected to the Vin pins of U5 and U6 respectively.

[0093] Control section: The 5V_USBA_EN signal is connected to the base of Q41 through R178. The emitter of Q41 is grounded, and the collector is connected to pin 4 of Q40. One end of R179 is connected to the base of Q41, and the other end is grounded.

[0094] The second power conversion module: The FSW, ISET, FB, and other pins of U5 and U6 are connected to the corresponding resistors (such as R174, R175, R195, etc.) to set the chip's operating parameters. The SW pin is connected to the inductors (L6, L1) to perform voltage conversion and filtering in conjunction with the capacitors. The output 5V voltage is connected to the VBUS pin of the corresponding USB interface.

[0095] USB interface section: The VBUS pins of USB1 and USB2 are connected to the power output, the D+ and D- pins are used for data transmission, the GND pin is grounded, and ESD4 and ESD5 are connected between the VBUS and ground of the interface, respectively.

[0096] In one possible implementation, the power supply main control board further includes a second voltage divider circuit. The input terminal of the second voltage divider circuit is connected to the second interface circuit. After voltage division by the voltage divider resistor, a voltage signal is obtained and fed back to the output voltage of the second power conversion module.

[0097] In one possible implementation, the power control board further includes a second current monitoring circuit for monitoring the current of the second interfaces (USB1 and USB2 interfaces).

[0098] For the USB1 interface section, the line leading out from the USB1 pin is first connected to the eighth resistor R185 (100R), then connected in series with a small resistor (the ninth resistor R186, 0.02R, 1% accuracy) before grounding. A line labeled ADC_5V_USBA_I1 is led out at the node between R185 and R186 for outputting the monitoring signal.

[0099] The USB2 interface section has a similar structure. A line is led out from the USB2 pin, connected to resistor R188 (100Ω), then connected in series with resistor R189 (0.02Ω, 1% accuracy) before grounding. A line labeled ADC_5V_USBA_I2 is led out from the node between R188 and R189 to output the monitoring signal. The entire circuit uses this resistor combination to monitor the USB interface current.

[0100] Example 2 provides a portable power bank, including the power control board described in any of Examples 1-3 of this application.

[0101] The power supply control board features multiple Type-C and USB interface circuits. The Type-C interface is compatible with various digital products, while the USB interface further expands its compatibility, facilitating the connection of various USB devices and improving the power supply control board's versatility. The first and second voltage conversion circuits, through a power management chip and in conjunction with inductors, capacitors, and other components, accurately perform voltage conversion. Simultaneously, the filtering module effectively filters out noise and ripple, outputting a stable and clean voltage, providing reliable power supply to devices, reducing damage caused by voltage instability, and extending device lifespan. The first power management chip connects to the configuration channel pins of the first connector via configuration channel pins, enabling power negotiation with connected external devices. It automatically matches the required power supply voltage and current, achieving intelligent power supply, improving power utilization efficiency, and avoiding unnecessary energy loss. The first interface circuit is equipped with a first status monitoring module, which can monitor the power supply and operating status of the interface in real time, such as voltage, current, and connection status. This allows users to promptly understand the operating status of the power supply control board and connected devices, and quickly troubleshoot and resolve any abnormalities. Both the first and second interface circuits are equipped with interface protection modules. Built-in electrostatic discharge (ESD) protection components effectively prevent damage to the interfaces and connected devices from static electricity. Furthermore, the voltage divider circuit provides feedback on the output voltage, helping to promptly detect overvoltage issues and ensuring the safe and stable operation of the circuits and equipment. The power input and control module, through a circuit composed of MOSFETs, transistors, and related resistors, precisely controls the power supply based on control signals. This not only cuts off power when not needed, saving energy, but also promptly cuts off power in case of circuit abnormalities, providing protection.

[0102] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A power supply main control board, characterized in that, include: Multiple first interface circuits and first voltage conversion circuits; Each first interface circuit is connected to a first voltage conversion circuit; The first interface circuit includes a first connector; the first connector includes a power pin, a data pin, and a configuration channel pin; the power pin is connected to the output of a first voltage conversion circuit; the data pin is connected to an external data transmission line; and the configuration channel pin is used for power supply negotiation. The first voltage conversion circuit includes a first power input and control module, a first power conversion module, and a first filter module; the first power input and control module is connected to the first power conversion module; the first power conversion module is connected to the first filter module. The first power conversion module includes a first power management chip; the positive terminal of the battery is connected to the first power input and control module, and after being controlled by the field-effect transistor and transistor of the first power input and control module, it is input to the input pin of the first power management chip through a filter capacitor; the first power management chip and an inductor work together to complete voltage conversion, and the converted voltage is output through the output pin of the first power management chip. After being filtered by the first filter module, a stable output voltage is obtained; the output voltage serves as the power supply for the first interface circuit. The configuration channel pin of the first power management chip is connected to the configuration channel pin of the first connector for power supply negotiation with the external device connected to the first interface.

2. The power supply main control board according to claim 1, characterized in that, The first voltage conversion circuit includes: The positive terminal of the battery is connected to the pin of the field-effect transistor and also to the first resistor. The other end of the first resistor is connected to the second resistor and then grounded. The output terminal of the field-effect transistor is connected to a capacitor and then to the input pin of the first power management chip to provide it with input power. The first control signal is connected to the base of the transistor via the third resistor. The emitter of the transistor is grounded, and the collector is connected to a control pin of the field-effect transistor. One end of the fourth resistor is connected to the base of the field-effect transistor, and the other end is grounded. It is used to control the state of the transistor, and thus control the field-effect transistor. The BST pin of the first power management chip is connected to a capacitor, the SW pin is connected to an inductor, then to a filter capacitor and a fifth resistor, and finally to the voltage output terminal; the voltage is output through the output pin of the first power management chip.

3. The power supply main control board according to claim 1, characterized in that, The first interface is a Type-C interface, and the power control board includes 4 Type-C interface circuits.

4. The power supply main control board according to claim 1, characterized in that, The power supply main control board also includes a first voltage divider circuit. The input terminal of the first voltage divider circuit is connected to the first voltage conversion circuit. After voltage division by the voltage divider resistor, a voltage signal is obtained and fed back to the output voltage of the first voltage conversion circuit.

5. The power supply main control board according to claim 1, characterized in that, The first interface circuit also includes a first status monitoring module for monitoring the power supply and operating status of the first interface.

6. The power supply main control board according to claim 1, characterized in that, The power supply main control board also includes a second interface circuit, which includes a second power input and control module, a second power conversion module, and a second filtering module. The second power conversion module includes a second power management chip. The second power input and control module is connected to the second power conversion module. The second power conversion module is connected to the second filtering module. The output terminal of the second filtering module is connected to the VBUS pin of the second interface. The second interface is a USB interface.

7. The power supply main control board according to claim 6, characterized in that, The second power conversion module includes two second power management chips; the two second power management chips convert the output power to power the second interface.

8. The power supply main control board according to claim 6, characterized in that, The second power input and control module includes voltage divider resistors, transistors, and MOSFETs; the positive terminal of the battery is connected to the relevant pins of the MOSFET, and also to the sixth resistor, the other end of the sixth resistor is connected to the seventh resistor and then grounded; the output terminal of the MOSFET is connected to a filter capacitor and then to the input pins of two second power management chips; the second power management chips and inductors work together to complete voltage conversion; The converted voltage is filtered by the inductor and multiple capacitors of the second filter module to output a stable output voltage, which is then connected to the VBUS pin of the corresponding USB interface.

9. The power supply main control board according to claim 6, characterized in that, The power supply main control board also includes a second current monitoring circuit for monitoring the current of the second interface, including: The USB interface leads are connected to the eighth resistor and then in series with the ninth resistor. A monitoring line is led out at the midpoint between the eighth and ninth resistors to output the monitoring signal.

10. A portable power bank, characterized in that, include: The power control board according to any one of claims 1-9.

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