Plug-in switching module for round hole adapter and type-c adapter without power-off

Abstract

The present application relates to the technical field of power supply circuit, in particular to a module for switching between a round-hole adapter and a Type-C adapter without power-off. The module comprises a uninterrupted power supply module, a round-hole adapter and a Type-C adapter. In the present application, when the round-hole adapter and the Type-C adapter are connected at the same time, the system starts with the round-hole adapter first. If the round-hole adapter is removed during operation, the module quickly connects to the ground through the Switch pin, informs the system to reduce the frequency to reduce power consumption, and seamlessly switches to Type-C power supply to avoid voltage drop caused by power-off. If the system is originally powered by Type-C, after the round-hole adapter is inserted, the module will automatically disconnect Type-C and switch to round-hole adapter power supply after the voltage is stable. This mechanism not only allows users to freely plug in and plug out between different power sources without the need to shut down, but also greatly improves the reliability and operational convenience of continuous operation of the device.

Description

Technical Field

[0001] This invention relates to the field of power supply circuit technology, and more specifically, to a module that does not lose power when switching between a round-hole adapter and a Type-C adapter. Background Technology

[0002] The power supply circuit is the core system in electronic devices responsible for providing a stable power supply. It converts the input power into the DC or AC power required by the device to achieve energy transmission, signal processing, and system control.

[0003] Traditional laptops rely on built-in batteries, which can provide continuous power even when the external adapter is disconnected, effectively ensuring work continuity and device portability. However, most mini PCs and various compact computer devices that are equipped with both round-port adapters and Type-C interfaces for power supply often omit the integrated battery module in pursuit of miniaturization and low cost. This results in a significant structural shortcoming: the inability to switch between the two power input methods without interrupting power supply during system operation.

[0004] If a user plugs or unplugs any power connector while the device is running, it will immediately cause a power outage and system crash. This sudden power failure not only interrupts user operation and affects work efficiency, but may also lead to data loss, file system corruption, or even hardware failure, severely limiting the reliability of such devices in critical missions and continuous application scenarios. Therefore, providing a module that enables uninterrupted power switching between Type-C and round-port adapters has become a key technical requirement for improving the practicality and user experience of such devices. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that miniaturized electronic devices without integrated battery modules cannot switch power supplies without losing power.

[0006] The purpose of this invention is to provide a module that allows for seamless power switching between a round hole adapter and a Type-C adapter. By introducing a special round hole DC connector and circuit design, it ensures seamless power connection when the host is powered on, avoids system power outages, and improves the ease of use and stability of the device.

[0007] To achieve the above objectives, the present invention aims to provide a module for switching between a round hole adapter and a Type-C adapter without power loss, including an uninterruptible power supply module and a round hole adapter and a Type-C adapter electrically connected to the uninterruptible power supply module. The uninterruptible power supply module includes a power adaptation circuit, a control switching circuit, and a load control circuit.

[0008] The round hole adapter and the Type-C adapter are connected to the power adapter circuit. The power adapter circuit is connected to the control switching circuit and the load control circuit. The control switching circuit is connected to the load control circuit. The load control circuit is connected to the processor.

[0009] When the power adapter circuit detects that the circular adapter is inserted / removed, it switches the power supply through the control switching circuit and adjusts the processor load through the load control circuit.

[0010] As a further improvement to this technical solution, the power adapter circuit includes a circular hole detection circuit, a first adapter circuit, and a second adapter circuit.

[0011] The first adapter circuit is connected to the Type-C adapter to adapt to the power supply current of the Type-C adapter;

[0012] The second adapter circuit and the circular hole detection circuit are both connected to the circular hole adapter. The second adapter circuit is used to adapt to the power supply current of the circular hole adapter, and the circular hole detection circuit is used to detect the insertion and removal status of the circular hole adapter.

[0013] The circular hole detection circuit, the first adapter circuit, and the second adapter circuit are all connected to the control switching circuit.

[0014] As a further improvement to this technical solution, the circular hole detection circuit includes MOS transistors Q5903, Q5904, and Q5905;

[0015] The gate of the MOSFET Q5903 is connected to the resistor R5906, the resistor R5906 is connected to the mechanical switch pin, the source of the MOSFET Q5903 is grounded, the drain of the MOSFET Q5903 is connected to the resistor R5904 and in parallel to the gate of the MOSFET Q5904 and the gate of the MOSFET Q5905, and the resistor R5904 is connected to the +3V_CTRL terminal;

[0016] The source of the MOSFET Q5904 is grounded, and the drain of the MOSFET Q5904 is connected to the resistor R5905. The resistor R5905 is connected to the signal terminal of the round-head adapter.

[0017] The source of the MOSFET Q5905 is grounded, and the drain of the MOSFET Q5905 is connected to a resistor R5907, which is connected to a 19V power supply.

[0018] As a further improvement to this technical solution, the circular hole adapter is connector J5901;

[0019] The second adapter circuit includes MOSFETs PQ5901, PQ5902, and PQ5903;

[0020] The gate of the MOS transistor PQ5901 is connected to the gate of the MOS transistor PQ5902 and connected to capacitors PC5902, PC5905, PC5906 and resistor PR5904. The source of the MOS transistor PQ5901 is connected to the source of the MOS transistor PQ5902, resistor PR5903 is connected to the other end of capacitor PC5902.

[0021] The drain of the MOSFET PQ5902 is connected to the capacitor PC5907, the other end of the capacitor PC5906 is connected in parallel to the system power supply terminal, and the capacitor PC5907 is grounded.

[0022] The source of the MOSFET PQ5901 is connected to capacitor PC5901, resistor PR5901, PR5902, inductor PL5901 and connected in parallel to a +19V power supply, capacitor PC5905, resistor PR5901 is connected to the other end of resistor PR5902 and connected in parallel to capacitor PC5908, and capacitor PC5908 is grounded.

[0023] The inductor PL5901 is connected to capacitors PC5903 and PC5904, the negative terminal of diode PV5901, the power supply terminal of the round adapter, and the DC IN pin of connector J5901. The capacitor PC5903 is connected to the other end of capacitor PC5904, the positive terminal of diode PV5901, the GND pin of connector J5901, and grounded.

[0024] The SWITCH pin of connector J5901 is connected to the mechanical switch pin.

[0025] The gate of the MOSFET PQ5903 is connected to capacitor PC5909, resistor PR5906, and resistor PR5907, and is connected to the signal terminal of the round-head adapter. Resistor PR5906 is connected to the 19V power supply terminal, and resistor PR5907 is connected to the other end of capacitor PC5909 and grounded.

[0026] The drain of the MOSFET PQ5903 is connected to the resistor PR5905, and the resistor PR5905 is connected to the other end of the resistor PR5903 and the other end of the resistor PR5904.

[0027] The source of the MOS transistor PQ5903 is grounded.

[0028] As a further improvement to this technical solution, the control switching circuit includes MOS transistors Q4701, Q4702, Q4703, and Q4704;

[0029] The gate of the MOSFET Q4701 is connected to the gate of the MOSFET Q4702, and the capacitor C4701 is connected in parallel with resistors R4704 and R4705.

[0030] The source of the MOSFET Q4701 is connected to the source of the MOSFET Q4702 and to the other end of the resistor R4704 and the other end of the capacitor C4701. The drain of the MOSFET Q4702 is connected to the system power supply terminal.

[0031] The drain of the MOSFET Q4701 is connected to capacitors C4702, C4703, and C4704, the negative terminal of diode V4715, and then connected to the Type-C power supply terminal. The Type-C power supply terminal is connected to the first adapter circuit. The positive terminal of diode V4715 is connected to the other end of capacitors C4702, C4703, and C4704, and then grounded.

[0032] The gate of the MOSFET Q4703 is connected to the drain of the MOSFET Q4704 and connected to resistors R4706 and R4707. Resistor R4707 is grounded, and the source of the MOSFET Q4703 is grounded.

[0033] The gate of the MOSFET Q4704 is connected to the signal terminal of the round-head adapter, and the source of the MOSFET Q4704 is grounded.

[0034] As a further improvement to this technical solution, the load control circuit includes MOSFETs Q5901A and Q5901B;

[0035] The gate of the MOS transistor Q5901A is connected to resistors R5901 and R5902, capacitor C5901 and connected to the resistor divider signal terminal. Resistor R5901 is connected to the +3V_CTRL terminal, and resistor R5902 is connected to the other end of capacitor C5901 and connected to the mechanical switch pin terminal.

[0036] The source of the MOSFET Q5901A is grounded, the drain of the MOSFET Q5901A is connected to resistor R5903 and then to the gate of the MOSFET Q5091B, and resistor R5903 is connected to the +3.3V_LDO terminal.

[0037] The source of the MOSFET Q5901B is grounded, and the drain of the MOSFET Q5901B is connected to the resistor R5910. The resistor R5910 is connected to the frequency reduction signal terminal.

[0038] In this invention, when the round hole adapter and the Type-C adapter are connected to the host device at the same time, the host device is powered on by the round hole adapter first. After powering on, the adapter is unplugged. Before the system power supply drops to a level that is insufficient to maintain normal system operation, the Switch pin of the round hole adapter connector interface is quickly grounded to notify the host to reduce the frequency to reduce the load. At the same time, the power supply of the Type-C adapter is switched off to allow the system to operate normally.

[0039] When the system is powered only by the Type-C adapter, insert the round-hole adapter. When the voltage of the round-hole adapter reaches a level that allows the system to operate stably, disconnect the Type-C adapter, thus prioritizing power supply from the round-hole adapter.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] In this module that allows for seamless switching between the round-hole adapter and the Type-C adapter without power loss, when both the round-hole adapter and the Type-C adapter are connected simultaneously, the system prioritizes powering on with the round-hole adapter. If the round-hole adapter is removed during operation, the module quickly grounds through its Switch pin, notifying the system to reduce the frequency to lower power consumption, while seamlessly switching to Type-C power supply to avoid power loss due to voltage drops.

[0042] Conversely, if the system was originally powered only by Type-C, after inserting the round-hole adapter, the module will automatically disconnect Type-C after its voltage stabilizes and switch to the round-hole adapter for priority power supply. This mechanism not only allows users to freely plug and unplug between different power sources without shutting down the device, but also greatly improves the reliability and ease of operation of the device during continuous operation. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 This is a circuit diagram for the circular hole detection of the present invention;

[0045] Figure 3 The second adapter circuit of the present invention Figure 1 ;

[0046] Figure 4 The second adapter circuit of the present invention Figure 2 ;

[0047] Figure 5 The second adapter circuit of the present invention Figure 3 ;

[0048] Figure 6 This is a control switching circuit diagram of the present invention;

[0049] Figure 7 This is a circuit diagram of the load control circuit of the present invention. Detailed Implementation

[0050] The technical solutions in 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.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] Please see Figures 1-7 As shown, the purpose of this embodiment is to provide a module that allows for plugging and unplugging of a round hole adapter and a Type-C adapter without losing power. The module includes an uninterruptible power supply module and a round hole adapter and a Type-C adapter that are electrically connected to the uninterruptible power supply module. The uninterruptible power supply module includes a power adapter circuit, a control switching circuit, and a load control circuit.

[0053] The round-hole adapter and Type-C adapter are connected to the power adapter circuit. The power adapter circuit is connected to the control switching circuit and the load control circuit. The control switching circuit is connected to the load control circuit. The load control circuit is connected to the processor (CPU).

[0054] When the power adapter circuit detects the insertion / removal of the round-hole adapter, it switches the power supply by controlling the switching circuit and adjusts the processor load by controlling the load control circuit. This enables a rapid switch between power supply from the Type-C adapter and the round-hole adapter. The response time of the entire switching process can be controlled at the microsecond level, effectively preventing system voltage drops.

[0055] The power adapter circuit includes a circular hole detection circuit, a first adapter circuit, and a second adapter circuit.

[0056] The first adapter circuit is connected to the Type-C adapter to adapt to the power supply current of the Type-C adapter;

[0057] The second adapter circuit and the round hole detection circuit are both connected to the round hole adapter. The second adapter circuit is used to adapt to the power supply current of the round hole adapter, and the round hole detection circuit is used to detect the insertion and removal status of the round hole adapter.

[0058] The circular hole detection circuit, the first adapter circuit, and the second adapter circuit are all connected to the control switching circuit.

[0059] The circular hole detection circuit includes MOSFETs Q5903, Q5904, and Q5905;

[0060] The gate of MOSFET Q5903 is connected to resistor R5906. Resistor R5906 is connected to the mechanical switch pin. The source of MOSFET Q5903 is grounded. The drain of MOSFET Q5903 is connected to resistor R5904 and then to the gate of MOSFET Q5904 and the gate of MOSFET Q5905. Resistor R5904 is connected to the +3V_CTRL terminal.

[0061] The source of MOSFET Q5904 is grounded, and the drain of MOSFET Q5904 is connected to resistor R5905. Resistor R5905 is connected to the signal terminal of the round-head adapter.

[0062] The source of MOSFET Q5905 is grounded, and the drain of MOSFET Q5905 is connected to resistor R5907. Resistor R5907 is connected to the 19V power supply terminal.

[0063] The round-hole adapter is connector J5901;

[0064] The second adapter circuit includes MOSFETs PQ5901, PQ5902, and PQ5903;

[0065] The gate of MOSFET PQ5901 is connected to the gate of MOSFET PQ5902 and connected in parallel with capacitors PC5902, PC5905, PC5906 and resistor PR5904. The source of MOSFET PQ5901 is connected to the source of MOSFET PQ5902 and resistor PR5903 is connected in parallel with the other end of capacitor PC5902.

[0066] The drain of MOSFET PQ5902 is connected to capacitor PC5907, and the other end of capacitor PC5906 is connected in parallel to the system power supply. Capacitor PC5907 is grounded.

[0067] The source of MOSFET PQ5901 is connected to capacitor PC5901, resistor PR5901, PR5902, inductor PL5901 and connected in parallel to a 19V power supply (19V after inductor filtering), capacitor PC5905, resistor PR5901 is connected to the other end of resistor PR5902 and connected in parallel to capacitor PC5908, and capacitor PC5908 is grounded.

[0068] Inductor PL5901 is connected to capacitors PC5903 and PC5904, the negative terminal of diode PV5901, the power supply terminal of the round adapter, and connected to the DC IN pin of connector J5901. Capacitor PC5903 is connected to the other end of capacitor PC5904, the positive terminal of diode PV5901, the GND pin of connector J5901, and grounded.

[0069] The SWITCH pin of connector J5901 is connected to the mechanical switch pin.

[0070] The gate of MOSFET PQ5903 is connected to capacitor PC5909, resistor PR5906, and resistor PR5907, and then connected to the signal terminal of the round-head adapter. Resistor PR5906 is connected to the 19V power supply terminal, and resistor PR5907 is connected to the other end of capacitor PC5909 and grounded.

[0071] The drain of MOSFET PQ5903 is connected to resistor PR5905, and resistor PR5905 is connected to the other end of resistor PR5903 and in parallel to the other end of resistor PR5904.

[0072] The source of the MOSFET PQ5903 is grounded.

[0073] Connect the 19V power supply terminal to resistor R5908. Connect resistor R5908 to resistor R5909 and then to the positive terminal of diode D5902. Connect resistor R5909 to ground. Connect the negative terminal of diode D5902 to the negative terminal of diode D5901 and then to the +3V_CTRL terminal. Connect the positive terminal of diode D5901 to the +3.3V_LDO terminal.

[0074] The circular hole detection circuit adopts a high-speed comparison structure composed of MOSFETs Q5903, Q5904, and Q5905, which can send a circular adapter insertion signal within 1ms after detecting a plugging / unplugging event, greatly improving the real-time performance of status awareness.

[0075] By default, the Type-C adapter outputs power to the control switching module through the first adapter circuit. When connector J5901 is plugged in and powered, the power supply current is converted to the processor's operating power by the second adapter circuit and then output to the control switching module. The control switching module then powers the processor. When connector J5901 is plugged in and powered, the round head adapter insertion signal output by the round hole detection circuit quickly jumps to a high level. The control switching circuit then shuts off the Type-C power supply path and seamlessly switches to the round hole adapter power supply. The switching delay is less than 500µs, and the voltage fluctuation range is controlled within 5%, ensuring that the system operation is not affected.

[0076] The control switching circuit includes MOSFETs Q4701, Q4702, Q4703, and Q4704;

[0077] The gate of MOSFET Q4701 is connected to the gate of MOSFET Q4702, and capacitor C4701 is connected in parallel with resistors R4704 and R4705.

[0078] The source of MOSFET Q4701 is connected to the source of MOSFET Q4702 and in parallel to the other end of resistor R4704 and capacitor C4701. The drain of MOSFET Q4702 is connected to the system power supply.

[0079] The drain of MOSFET Q4701 is connected to capacitors C4702, C4703, and C4704, the negative terminal of diode V4715, and then connected to the Type-C power supply terminal. The Type-C power supply terminal is connected to the first adapter circuit. The positive terminal of diode V4715 is connected to the other end of capacitors C4702, C4703, and C4704, and then grounded.

[0080] The gate of MOSFET Q4703 is connected to the drain of MOSFET Q4704 and connected in parallel with resistors R4706 and R4707. Resistor R4707 is grounded, and the source of MOSFET Q4703 is grounded.

[0081] The gate of MOSFET Q4704 is connected to the signal terminal of the round-headed adapter, and the source of MOSFET Q4704 is grounded.

[0082] When both the round-hole adapter and the Type-C adapter (including displays with one-line power supply) are connected to the host device, the round-hole adapter insertion signal is high, which causes the gate of the NMOS transistor Q4703 to be low, thus turning off the connection between the two back-to-back PMOS transistors (i.e., MOS transistors Q4701 and Q4702). This prevents the Type-C adapter from supplying power, and the round-hole adapter is given priority for power supply.

[0083] The control switching circuit adopts a combination structure of back-to-back PMOS transistor groups (Q4701, Q4702) and NMOS control transistors (Q4703, Q4704), which has low on-resistance (<20mΩ) and high frequency response characteristics, and supports rapid switching of multi-ampere current.

[0084] The load control circuit includes MOSFETs Q5901A and Q5901B;

[0085] The gate of MOSFET Q5901A is connected to resistors R5901 and R5902, capacitor C5901 and connected in parallel to the voltage divider signal terminal. Resistor R5901 is connected to the +3V_CTRL terminal. Resistor R5902 is connected to the other end of capacitor C5901 and connected in parallel to the mechanical switch pin terminal.

[0086] The source of MOSFET Q5901A is grounded, the drain of MOSFET Q5901A is connected to resistor R5903 and then to the gate of MOSFET Q5091B, and resistor R5903 is connected to the +3.3V_LDO terminal.

[0087] The source of MOSFET Q5901B is grounded, and the drain of MOSFET Q5901B is connected to resistor R5910. Resistor R5910 is connected to the frequency reduction signal terminal.

[0088] The load control circuit can quickly pull down the frequency reduction signal via a mechanical switch pin when it detects that the round-hole adapter has been removed, notifying the processor to execute a frequency reduction instruction. This dynamically adjusts the core voltage and frequency, reducing system power consumption to the level required for Type-C adapter power supply within 2ms, thus avoiding power interruption due to sudden load drops. When the round-hole adapter is inserted into the Type-C power supply, the round-hole adapter insertion signal is reset high. After the control circuit detects that the round-hole power supply has been stably established (voltage rise time not exceeding 3ms), it immediately cuts off the Type-C power supply and switches to the round-hole power supply, achieving a seamless reverse switching.

[0089] After the host device boots up and enters the system normally, unplugging the round-hole adapter will quickly ground the switch pin of the round-hole connector, pulling the frequency reduction signal low. This will then notify the processor to perform frequency reduction to reduce the load, so that it can switch to Type-C adapter power supply.

[0090] When both the round-pin adapter and the Type-C adapter (including monitors with one-cable power delivery) are connected to the host device, the round-pin adapter insertion signal is high, causing the gate of NMOS transistor Q4703 to go low. This turns off MOS transistors Q4701 and Q4702, connecting the two back-to-back PMOS transistors, thus preventing the Type-C adapter from supplying power and prioritizing power from the round-pin adapter. Once the host device powers on normally and enters the system, unplugging the round-pin adapter causes the switch pin of the round-pin connector to quickly ground, pulling the frequency reduction signal low. This signals the CPU to reduce its frequency to lower the load. Simultaneously, the round-pin adapter insertion signal is pulled low, causing the gate of NMOS transistor Q4703 to go high, turning on the back-to-back PMOS transistors. Before the system power supply drops to a level insufficient to maintain normal system operation, power from the Type-C adapter is promptly restored, thus switching power from the round-pin adapter to the Type-C adapter.

[0091] When the system is powered only by the Type-C adapter, inserting the round adapter will cause the round adapter insertion signal to be high, which will cause the gate of the NMOS transistor Q4703 to be low, thus turning off the connection between the two back-to-back PMOS transistors. This enables a fast switch between Type-C adapter power supply and round adapter power supply.

[0092] In summary, this invention provides a module that allows for seamless switching between a round-hole adapter and a Type-C adapter without power loss. This module, through the introduction of a specially structured round-hole DC connector and corresponding intelligent circuit design, automatically detects and coordinates the input status of the two power supply interfaces during the host's startup and operation, achieving seamless power supply connection. This module features high response speed (overall switching time < 5ms), low power consumption (overall efficiency > 95%), and excellent voltage stability (fluctuation not exceeding ±5%). This design completely avoids system power outages caused by arbitrarily plugging and unplugging power cables, significantly improving the ease of use and power supply stability of such devices.

[0093] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A module for switching between a round-hole adapter and a Type-C adapter without power loss, comprising an uninterruptible power supply module and a round-hole adapter and a Type-C adapter electrically connected to the uninterruptible power supply module, characterized in that: The uninterruptible power supply module includes a power adapter circuit, a control switching circuit, and a load control circuit. The round hole adapter and the Type-C adapter are connected to the power adapter circuit. The power adapter circuit is connected to the control switching circuit and the load control circuit. The control switching circuit is connected to the load control circuit. The load control circuit is connected to the processor. When the power adapter circuit detects the insertion / removal of the circular adapter, it switches the power supply through the control switching circuit and adjusts the processor load through the load control circuit. The power adapter circuit includes a circular hole detection circuit, a first adapter circuit, and a second adapter circuit. The first adapter circuit is connected to the Type-C adapter to adapt to the power supply current of the Type-C adapter; The second adapter circuit and the circular hole detection circuit are both connected to the circular hole adapter. The second adapter circuit is used to adapt to the power supply current of the circular hole adapter, and the circular hole detection circuit is used to detect the insertion and removal status of the circular hole adapter. The circular hole detection circuit, the first adapter circuit, and the second adapter circuit are all connected to the control switching circuit; The control switching circuit includes MOSFETs Q4701, Q4702, Q4703, and Q4704; The gate of the MOSFET Q4701 is connected to the gate of the MOSFET Q4702, and the capacitor C4701 is connected in parallel with resistors R4704 and R4705. The source of the MOSFET Q4701 is connected to the source of the MOSFET Q4702 and to the other end of the resistor R4704 and the other end of the capacitor C4701. The drain of the MOSFET Q4702 is connected to the system power supply terminal. The drain of the MOSFET Q4701 is connected to capacitors C4702, C4703, and C4704, the negative terminal of diode V4715, and then connected to the Type-C power supply terminal. The Type-C power supply terminal is connected to the first adapter circuit. The positive terminal of diode V4715 is connected to the other end of capacitors C4702, C4703, and C4704, and then grounded. The gate of the MOSFET Q4703 is connected to the drain of the MOSFET Q4704 and connected to resistors R4706 and R4707. Resistor R4707 is grounded, and the source of the MOSFET Q4703 is grounded. The gate of the MOSFET Q4704 is connected to the signal terminal of the round-head adapter, and the source of the MOSFET Q4704 is grounded.

2. The module for switching between the round-hole adapter and the Type-C adapter without power loss as described in claim 1, characterized in that: The circular hole detection circuit includes MOSFETs Q5903, Q5904, and Q5905; The gate of the MOSFET Q5903 is connected to the resistor R5906, the resistor R5906 is connected to the mechanical switch pin, the source of the MOSFET Q5903 is grounded, the drain of the MOSFET Q5903 is connected to the resistor R5904 and in parallel to the gate of the MOSFET Q5904 and the gate of the MOSFET Q5905, and the resistor R5904 is connected to the +3V_CTRL terminal; The source of the MOSFET Q5904 is grounded, and the drain of the MOSFET Q5904 is connected to the resistor R5905. The resistor R5905 is connected to the signal terminal of the round-head adapter. The source of the MOSFET Q5905 is grounded, and the drain of the MOSFET Q5905 is connected to a resistor R5907, which is connected to a 19V power supply.

3. The module for switching between the round-hole adapter and the Type-C adapter without power loss according to claim 2, characterized in that: The round hole adapter is connector J5901; The second adapter circuit includes MOSFETs PQ5901, PQ5902, and PQ5903; The gate of the MOS transistor PQ5901 is connected to the gate of the MOS transistor PQ5902 and connected to capacitors PC5902, PC5905, PC5906 and resistor PR5904. The source of the MOS transistor PQ5901 is connected to the source of the MOS transistor PQ5902, resistor PR5903 is connected to the other end of capacitor PC5902. The drain of the MOSFET PQ5902 is connected to capacitor PC5907, the other end of capacitor PC5906 is connected in parallel to the system power supply terminal, and capacitor PC5907 is grounded. The source of the MOSFET PQ5901 is connected to capacitor PC5901, resistor PR5901, resistor PR5902, inductor PL5901 and connected in parallel to a 19V power supply, capacitor PC5905, resistor PR5901 is connected to the other end of resistor PR5902 and connected in parallel to capacitor PC5908, and capacitor PC5908 is grounded. The inductor PL5901 is connected to capacitors PC5903 and PC5904, the negative terminal of diode PV5901, the power supply terminal of the round adapter, and the DC IN pin of connector J5901. The capacitor PC5903 is connected to the other end of capacitor PC5904, the positive terminal of diode PV5901, the GND pin of connector J5901, and grounded. The SWITCH pin of connector J5901 is connected to the mechanical switch pin. The gate of the MOSFET PQ5903 is connected to capacitor PC5909, resistor PR5906, and resistor PR5907, and is connected to the signal terminal of the round-head adapter. Resistor PR5906 is connected to the 19V power supply terminal, and resistor PR5907 is connected to the other end of capacitor PC5909 and grounded. The drain of the MOSFET PQ5903 is connected to the resistor PR5905, and the resistor PR5905 is connected to the other end of the resistor PR5903 and the other end of the resistor PR5904. The source of the MOS transistor PQ5903 is grounded.

4. The module for switching between the round-hole adapter and the Type-C adapter without power loss as described in claim 3, characterized in that: The load control circuit includes MOSFETs Q5901A and Q5901B; The gate of the MOS transistor Q5901A is connected to resistors R5901 and R5902, capacitor C5901 and connected to the resistor divider signal terminal. Resistor R5901 is connected to the +3V_CTRL terminal, and resistor R5902 is connected to the other end of capacitor C5901 and connected to the mechanical switch pin terminal. The source of the MOSFET Q5901A is grounded, the drain of the MOSFET Q5901A is connected to resistor R5903 and then to the gate of the MOSFET Q5091B, and resistor R5903 is connected to the +3.3V_LDO terminal. The source of the MOSFET Q5901B is grounded, and the drain of the MOSFET Q5901B is connected to the resistor R5910. The resistor R5910 is connected to the frequency reduction signal terminal.

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