Intelligent extension socket 220V alternating current power supply and TYPE-C power supply switching circuit

Abstract

The utility model relates to a 220V alternating current power supply and TYPE-C power supply switching circuit of an intelligent extension socket, which comprises a TYPE-C interface, an AC-DC interface, a soft start circuit, a DC-DC module, a current limiting IC, an output interface, a first N-MOS, a second N-MOS, a first double P-MOS and a second double P-MOS, when it is detected that the AC-DC interface is electrified, the soft start circuit opens the first N-MOS and closes the second N-MOS, at the moment, power is supplied by means of alternating current, and the double P-MOS of the TYPE-C path is closed to prevent backflow; and when the AC-DC interface is detected to be out of power, the soft start circuit closes the first N-MOS and opens the second N-MOS, and the double P-MOS of the DC-DC path is closed to prevent backflow, so that the purpose of low-cost switching between 220V alternating current power supply and TYPE-C power supply of the intelligent extension socket can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of intelligent power strip technology, and more specifically, to an intelligent power strip circuit that switches between 220V AC power supply and TYPE-C power supply. Background Technology

[0002] As consumers own more and more electronic devices, the demand for smart power strips that can support multiple power supply methods simultaneously is growing. This includes not only traditional 220V AC sockets, but also support for newer interfaces such as USB Type-C;

[0003] Users expect devices to automatically identify the type of connected device and its optimal power supply, and switch automatically without manual operation, simplifying the usage process. Smart power strips need to be able to automatically identify the type of connected device and its required power supply, which often requires highly accurate current and voltage detection circuits and complex algorithms to determine device needs. The circuit cost is high, so a low-cost smart power strip circuit that switches between 220V AC power supply and TYPE-C power supply is needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply, which addresses the above-mentioned deficiencies of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A smart power strip switching circuit for 220V AC power supply and TYPE-C power supply is constructed, which includes a TYPE-C interface, an AC-DC interface, a soft-start circuit, a DC-DC module, a current limiting IC and an output interface, and also includes a first N-MOS, a second N-MOS, a first dual P-MOS and a second dual P-MOS;

[0007] The current limiting IC is electrically connected to the output interface, and the current limiting IC is electrically connected to both the first dual P-MOS and the second dual P-MOS.

[0008] The AC-DC interface, the soft-start circuit, the DC-DC module, the first N-MOS and the first dual P-MOS are sequentially electrically connected to form the first branch;

[0009] The TYPE-C interface, the second N-MOS and the second dual P-MOS are electrically connected in sequence to form the second branch;

[0010] The soft-start circuit is electrically connected to the second N-MOS and is used to turn on the first N-MOS and turn off the second N-MOS when power is detected at the AC-DC interface, and to turn off the first N-MOS and turn on the second N-MOS when power is detected at the AC-DC interface.

[0011] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply described in this utility model further includes a voltage reference chip and an operational amplifier.

[0012] The voltage reference chip is electrically connected to the TYPE-C interface and is used to provide a reference voltage for the operational amplifier;

[0013] The operational amplifier is electrically connected to the TYPE-C interface and is used to continuously detect the TYPE-C interface voltage. When the TYPE-C interface voltage exceeds the reference voltage by a value exceeding the threshold, the second N-MOS is controlled to turn off.

[0014] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes the following: the positive input pin of the operational amplifier is connected to the output terminal of the voltage reference chip; the negative input pin of the operational amplifier is electrically connected to a first resistor and a second resistor; the other end of the first resistor is connected to the TYPE-C interface; and the other end of the second resistor is grounded. The positive power supply pin of the operational amplifier is electrically connected to a third resistor and a first capacitor; the other end of the third resistor is connected to the TYPE-C interface; and the other end of the first capacitor is grounded. The output terminal of the transport amplifier is connected to the gate (G) of the second N-MOS transistor.

[0015] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes an output terminal of the transport amplifier that is electrically connected to the drain (D) of a third N-MOS transistor. The source (S) of the third N-MOS transistor is grounded. The gate (G) of the third N-MOS transistor is electrically connected to a fourth resistor and a fifth resistor. The other end of the fourth resistor is grounded, and the other end of the fifth resistor is connected to the output terminal of the soft-start circuit.

[0016] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes a second dual P-MOS comprising a first P-MOS and a second P-MOS. The source (S) of the first P-MOS and the source (S) of the second P-MOS are electrically connected. The gate (G) of both the first P-MOS and the second P-MOS are electrically connected to the drain (D) of the second N-MOS. The drain of the first P-MOS is connected to the TYPE-C interface, and the drain of the second P-MOS is connected to the input terminal of the current limiting IC and a TVS diode. The other end of the TVS diode is grounded. The source (S) of the first P-MOS and the source (S) of the second P-MOS are also electrically connected to a sixth resistor. The other end of the sixth resistor is electrically connected to the gate (G) of the first P-MOS, the gate (G) of the second P-MOS, and a second capacitor. The other end of the second capacitor is grounded.

[0017] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes a voltage reference chip comprising a voltage reference IC, a seventh resistor, and a third capacitor. The power supply pin and output pin of the voltage reference IC are electrically connected to the seventh resistor and the third capacitor. The other end of the seventh resistor is connected to the TYPE-C interface, and the other end of the third capacitor is grounded. The grounding pin of the voltage reference IC is grounded. Both the power supply pin and output pin of the voltage reference IC are connected to the output terminal of the voltage reference chip.

[0018] The present invention relates to a smart power strip switching circuit for 220V AC power supply and TYPE-C power supply. The soft-start circuit includes an eight-pin MOSFET, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth N-MOS transistor, and a fourth capacitor. The four drain (D) pins of the eight-pin MOSFET are connected to the output of the soft-start circuit. The three source (S) pins of the eight-pin MOSFET are electrically connected to the eighth resistor, the ninth resistor, the fourth capacitor, and the AC-DC interface. The other end of the fourth capacitor is connected to the gate (G) pin of the eight-pin MOSFET. The other end of the eighth resistor is electrically connected to the gate (G) pin of the eight-pin MOSFET and the tenth resistor. The other end of the tenth resistor is electrically connected to the drain (D) of the fourth N-MOS transistor. The other end of the ninth resistor is electrically connected to the eleventh resistor and the gate (G) of the fourth N-MOS transistor. The other end of the eleventh resistor and the source (S) of the fourth N-MOS transistor are both grounded.

[0019] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes a first dual P-MOS comprising a third P-MOS and a fourth P-MOS; the source (S) of the third P-MOS and the source (S) of the fourth P-MOS are electrically connected, and the gate (G) of both the third P-MOS and the fourth P-MOS are electrically connected to the drain (D) of the first N-MOS; the drain of the third P-MOS is connected to the output terminal of the DC-DC module, and the drain of the fourth P-MOS is connected to the input terminal of the current limiting IC; the source (S) of the third P-MOS and the source (S) of the fourth P-MOS are also electrically connected to a twelfth resistor, the other end of the twelfth resistor is electrically connected to the gate (G) of the third P-MOS, the gate (G) of the fourth P-MOS, and a fifth capacitor, and the other end of the fifth capacitor is grounded.

[0020] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes a first N-MOS transistor whose gate (G) is electrically connected to a thirteenth and fourteenth resistor, the other end of the thirteenth resistor is electrically connected to a P-MOS transistor whose drain (D) is connected to the first N-MOS transistor, the first N-MOS transistor's source (S) is grounded, and the other end of the fourteenth resistor is grounded.

[0021] The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply of this utility model includes a current limiting IC comprising a current limiting module, a fifteenth resistor, a sixteenth resistor, a sixth capacitor, a seventh capacitor, and an eighth capacitor. The VIN pin of the current limiting module is electrically connected to the input terminal of the current limiting IC, the fifteenth resistor, and the sixth capacitor. The GND pin of the current limiting module is grounded. The EN pin of the current limiting module is electrically connected to the other end of the fifteenth resistor, and the other end of the sixth capacitor is grounded. The VOUT pin of the current limiting module is electrically connected to the output terminal of the current limiting IC, the seventh capacitor, and the eighth capacitor. The ILIM pin of the current limiting module is electrically connected to the sixteenth resistor, and the other end of the sixteenth resistor, the other end of the seventh capacitor, and the other end of the eighth capacitor are grounded.

[0022] The beneficial effects of this utility model are as follows: when power is detected at the AC-DC interface, the soft-start circuit turns on the first N-MOS and turns off the second N-MOS, and power is supplied by AC power. The dual P-MOS of the TYPE-C path is turned off to prevent backflow. When power is detected at the AC-DC interface, the soft-start circuit turns off the first N-MOS and turns on the second N-MOS. The dual P-MOS of the DC-DC path is turned off to prevent backflow. This can achieve the purpose of low-cost intelligent power strip switching between 220V AC power supply and TYPE-C power supply. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. 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.

[0024] Figure 1 This is a block diagram of the circuit principle for switching between 220V AC power supply and TYPE-C power supply of a smart power strip according to a preferred embodiment of this utility model.

[0025] Figure 2 This is a circuit diagram of the operational amplifier circuit for the 220V AC power supply and TYPE-C power supply switching circuit of the intelligent power strip according to a preferred embodiment of this utility model.

[0026] Figure 3 This is a circuit diagram of the voltage reference chip for the 220V AC power supply and TYPE-C power supply switching circuit of the intelligent power strip according to a preferred embodiment of this utility model.

[0027] Figure 4 This is a circuit diagram of the soft-start circuit for the 220V AC power supply and TYPE-C power supply switching circuit of the preferred embodiment of this utility model;

[0028] Figure 5 This is a circuit diagram of the DC-DC module of the intelligent power strip 220V AC power supply and TYPE-C power supply switching circuit of the preferred embodiment of this utility model;

[0029] Figure 6 This is a circuit diagram of a current-limiting IC for a smart power strip that switches between 220V AC power supply and TYPE-C power supply, which is a preferred embodiment of this utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, of the embodiments of this utility model. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The preferred embodiment of this utility model features a smart power strip that switches between 220V AC power supply and TYPE-C power supply. Figure 1 As shown, see also Figures 2-6It includes a TYPE-C interface, an AC-DC interface, a soft-start circuit 1, a DC-DC module 2, a current limiting IC 3, and an output interface (which can be a USB interface, an HDMI interface, etc.). It also includes a first N-MOS Q5, a second N-MOS Q7, a first dual P-MOS, and a second dual P-MOS.

[0032] The current limiting IC 3 is electrically connected to the output interface, and the current limiting IC 3 is also electrically connected to both the first dual P-MOS and the second dual P-MOS.

[0033] The AC-DC interface, soft-start circuit 1, DC-DC module 2, first N-MOS Q5 and first dual P-MOS are connected in sequence to form the first branch;

[0034] The TYPE-C interface, the second N-MOS Q7, and the second dual P-MOS are electrically connected in sequence to form the second branch;

[0035] The soft-start circuit is electrically connected to the second N-MOS Q7 and is used to turn on the first N-MOS Q5 and turn off the second N-MOS Q7 when power is detected at the AC-DC interface, and to turn off the first N-MOS Q5 and turn on the second N-MOS Q7 when power is detected at the AC-DC interface.

[0036] When power is detected at the AC-DC interface, the soft-start circuit turns on the first N-MOS Q5 and turns off the second N-MOS Q7, relying on AC power for supply. The dual P-MOS of the TYPE-C path is turned off to prevent backflow. When power is detected at the AC-DC interface, the soft-start circuit turns off the first N-MOS Q5 and turns on the second N-MOS Q7. The dual P-MOS of the DC-DC path is turned off to prevent backflow. This can achieve the purpose of low-cost intelligent power strip switching between 220V AC power supply and TYPE-C power supply.

[0037] like Figure 2 and Figure 3 As shown, the circuit also includes a voltage reference chip 4 and an operational amplifier 5, labeled U5 in the circuit diagram;

[0038] Voltage reference chip 4 is electrically connected to the TYPE-C interface and is used to provide a reference voltage for the operational amplifier;

[0039] Operational amplifier 5 is electrically connected to the TYPE-C interface to continuously detect the TYPE-C interface voltage. When the TYPE-C interface voltage exceeds the reference voltage by a value exceeding the threshold, it controls the second N-MOS Q7 to turn off.

[0040] When using TYPE-C power supply, a reference voltage is provided through a voltage reference chip. The operational amplifier detects the voltage value and shuts down the subsequent output when it exceeds a certain range, thus providing overvoltage protection. Preferably, the voltage value can be set to 5.4V or the equivalent value, but this is not limited.

[0041] The positive input pin of operational amplifier U5 is connected to the output of the voltage reference chip. The negative input pin of the operational amplifier is electrically connected to the first resistor R10 and the second resistor R11. The other end of the first resistor R10 is connected to the TYPE-C interface, and the other end of the second resistor R11 is grounded. The positive power supply pin of the operational amplifier is electrically connected to the third resistor R7 and the first capacitor C10. The other end of the third resistor R7 is connected to the TYPE-C interface, and the other end of the first capacitor C10 is grounded. The output of the transport amplifier is connected to the gate (G) of the second N-MOS Q7. The output of the transport amplifier is also electrically connected to the drain (D) of the third N-MOS Q6. The source (S) of the third N-MOS Q6 is grounded. The gate (G) of the third N-MOS Q6 is electrically connected to the fourth resistor R18 and the fifth resistor R6. The other end of the fourth resistor R18 is grounded, and the other end of the fifth resistor R6 is connected to the output of the soft-start circuit. The second dual P-MOS includes the first P-MOS Q3 and the second P-MOS Q4. The source (S) of the first P-MOS Q3 and the source (S) of the second P-MOS Q4 are electrically connected, and the gate (G) of the first P-MOS Q3 and the second P-MOS Q4 are electrically connected. The gate (G) of Q4 is electrically connected to the drain (D) of the second N-MOS Q7; the drain of the first P-MOS Q3 is connected to the TYPE-C interface, and the drain of the second P-MOS Q4 is connected to the input terminal of the current limiting IC and the TVS diode D1, with the other end of the TVS diode D1 grounded; the source (S) of the first P-MOS Q3 and the source (S) of the second P-MOS Q4 are also electrically connected to the sixth resistor R9, with the other end of the sixth resistor R9 electrically connected to the gates of the first P-MOS Q3 and the second P-MOS Q4, as well as the second capacitor C11, with the other end of the second capacitor C11 grounded;

[0042] R7 provides current limiting for the operational amplifier to prevent damage, while C10 prevents it from crashing. During operation, the inverting terminal of the operational amplifier detects the voltage of the TYPE-C port through R10 and R11, providing overvoltage protection. When no AC-DC converter is connected, Q6 is off and Q5 is on, opening the TYPE-C path; conversely, the TYPE-C path is closed when AC-DC is connected. Q6 provides redundancy, protecting the downstream circuitry in case of failure of one of its components, ensuring that no voltage exceeding 5V enters the downstream circuitry. D1 absorbs the surge voltage generated by Q3 and Q4 during voltage switching of the TYPE-C port under PD and other protocol states. This circuit has low requirements for the specifications of the MOS, operational amplifier, and voltage reference IC, saving costs.

[0043] like Figure 3 As shown, the voltage reference chip includes a voltage reference IC U4, a seventh resistor R8, and a third capacitor C8. The power supply pin and output pin of the voltage reference IC U4 are electrically connected to the seventh resistor R8 and the third capacitor C8. The other end of the seventh resistor is connected to a TYPE-C interface, and the other end of the third capacitor is grounded. The ground pin of the voltage reference IC is grounded. The power supply pin and output pin of the voltage reference IC U4 are connected to the output terminal of the voltage reference chip. The voltage reference IC is used to provide redundancy and avoid excessive sampling deviation caused by power fluctuations.

[0044] like Figure 4 As shown, the soft-start circuit includes an eight-pin MOSFET Q8, an eighth resistor R15, a ninth resistor R19, a tenth resistor R20, an eleventh resistor R21, a fourth N-MOS transistor Q9, and a fourth capacitor C12. The four drain (D) pins of the eight-pin MOSFET Q8 are connected to the output of the soft-start circuit. The three source (S) pins of the eight-pin MOSFET Q8 are electrically connected to the eighth resistor R15, the ninth resistor R19, the fourth capacitor C12, and the AC-DC interface. The other end of the fourth capacitor C12 is connected to the gate (G) pin of the eight-pin MOSFET Q8. The other end of the eighth resistor R15 is electrically connected to the gate (G) pin of the eight-pin MOSFET Q8 and the tenth resistor R20. The other end of the tenth resistor R20 is electrically connected to the drain (D) of the fourth N-MOS transistor Q9. The other end of the ninth resistor R19 is electrically connected to the eleventh resistor R21 and the gate (G) of the fourth N-MOS transistor. The other end of the eleventh resistor R21 and the source (S) of the fourth N-MOS transistor are both grounded. In application, the soft-start time can be adjusted by adjusting the values ​​of C12 and R20.

[0045] like Figure 5As shown, the first dual P-MOS includes a third P-MOS Q2 and a fourth P-MOS Q1; the source (S) of the third P-MOS Q2 and the source (S) of the fourth P-MOS Q1 are electrically connected, and the gate (G) of both the third P-MOS Q2 and the fourth P-MOS Q1 are electrically connected to the drain (D) of the first N-MOS Q5; the drain of the third P-MOS Q2 is connected to the output terminal of the DC-DC module, and the drain of the fourth P-MOS Q1 is connected to the input terminal of the current limiting IC; the source (S) of the third P-MOS Q2 and the source (S) of the fourth P-MOS Q1 are also electrically connected to the twelfth resistor R14, the other end of the twelfth resistor R14 is electrically connected to the gate (G) of the third P-MOS Q2, the gate (G) of the fourth P-MOS Q1, and the fifth capacitor C9, and the other end of the fifth capacitor C9 is grounded; the gate (G) of the first N-MOS Q5 is electrically connected to the thirteenth resistor R16 and the fourteenth resistor R17, the other end of the thirteenth resistor R16 is electrically connected to the drain (D) of the P-MOS; the first N-MOS... The source terminal of Q5 is grounded, and the other end of the fourteenth resistor R17 is grounded; MOS is used to reduce losses and prevent backflow; capacitors C9 and C11 are used to prevent MOS from crashing.

[0046] like Figure 6 As shown, the current limiting IC includes a current limiting module U2, a fifteenth resistor R3, a sixteenth resistor R2, a sixth capacitor C5, a seventh capacitor C4, and an eighth capacitor C7. The VIN pin of the current limiting module U2 is electrically connected to the input terminal of the current limiting IC, the fifteenth resistor R3, and the sixth capacitor C5. The GND pin of the current limiting module U2 is grounded. The EN pin of the current limiting module U2 is electrically connected to the other end of the fifteenth resistor R3, and the other end of the sixth capacitor C5 is grounded. The VOUT pin of the current limiting module U2 is electrically connected to the output terminal of the current limiting IC, the seventh capacitor C4, and the eighth capacitor C7. The ILIM pin of the current limiting module U2 is electrically connected to the sixteenth resistor R2. The other end of the sixteenth resistor R2 is grounded, the other end of the seventh capacitor C4 is grounded, and the other end of the eighth capacitor C7 is grounded. The circuit structure is simple and the current limiting effect is good.

[0047] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A smart power strip circuit for switching between 220V AC power supply and TYPE-C power supply, characterized in that, It includes a TYPE-C interface, an AC-DC interface, a soft-start circuit, a DC-DC module, a current limiting IC, and an output interface, as well as a first N-MOS, a second N-MOS, a first dual P-MOS, and a second dual P-MOS; The current limiting IC is electrically connected to the output interface, and the current limiting IC is electrically connected to both the first dual P-MOS and the second dual P-MOS. The AC-DC interface, the soft-start circuit, the DC-DC module, the first N-MOS and the first dual P-MOS are sequentially electrically connected to form the first branch; The TYPE-C interface, the second N-MOS and the second dual P-MOS are electrically connected in sequence to form the second branch; The soft-start circuit is electrically connected to the second N-MOS and is used to turn on the first N-MOS and turn off the second N-MOS when power is detected at the AC-DC interface, and to turn off the first N-MOS and turn on the second N-MOS when power is detected at the AC-DC interface.

2. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 1, characterized in that, The circuit also includes a voltage reference chip and an operational amplifier; The voltage reference chip is electrically connected to the TYPE-C interface and is used to provide a reference voltage for the operational amplifier; The operational amplifier is electrically connected to the TYPE-C interface and is used to continuously detect the TYPE-C interface voltage. When the TYPE-C interface voltage exceeds the reference voltage by a value exceeding the threshold, the second N-MOS is controlled to turn off.

3. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 2, characterized in that, The positive input pin of the operational amplifier is connected to the output of the voltage reference chip, and the negative input pin of the operational amplifier is electrically connected to a first resistor and a second resistor. The other end of the first resistor is connected to a TYPE-C interface, and the other end of the second resistor is grounded. The positive power supply pin of the operational amplifier is electrically connected to a third resistor and a first capacitor. The other end of the third resistor is connected to a TYPE-C interface, and the other end of the first capacitor is grounded. The output of the operational amplifier is connected to the gate (G) of the second N-MOS transistor.

4. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 3, characterized in that, The output terminal of the operational amplifier is also electrically connected to the drain (D) of the third N-MOS transistor. The source (S) of the third N-MOS transistor is grounded. The gate (G) of the third N-MOS transistor is electrically connected to a fourth resistor and a fifth resistor. The other end of the fourth resistor is grounded, and the other end of the fifth resistor is connected to the output terminal of the soft-start circuit.

5. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 3 or 4, characterized in that, The second dual P-MOS includes a first P-MOS and a second P-MOS. The source (S) of the first P-MOS and the source (S) of the second P-MOS are electrically connected. The gate (G) of both the first P-MOS and the second P-MOS are electrically connected to the drain (D) of the second N-MOS. The drain of the first P-MOS is connected to a TYPE-C interface. The drain of the second P-MOS is connected to the input terminal of the current limiting IC and a TVS diode. The other end of the TVS diode is grounded. The source (S) of the first P-MOS and the source (S) of the second P-MOS are also electrically connected to a sixth resistor. The other end of the sixth resistor is electrically connected to the gate (G) of the first P-MOS, the gate (G) of the second P-MOS, and a second capacitor. The other end of the second capacitor is grounded.

6. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 3 or 4, characterized in that, The voltage reference chip includes a voltage reference IC, a seventh resistor, and a third capacitor; the power supply pin and output pin of the voltage reference IC are electrically connected to the seventh resistor and the third capacitor, the other end of the seventh resistor is connected to a TYPE-C interface, and the other end of the third capacitor is grounded; the ground pin of the voltage reference IC is grounded; the power supply pin and output pin of the voltage reference IC are connected to the output terminal of the voltage reference chip.

7. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to any one of claims 1-4, characterized in that, The soft-start circuit includes an eight-pin MOSFET, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth N-MOS transistor, and a fourth capacitor. The four drain (D) pins of the eight-pin MOSFET are connected to the output of the soft-start circuit. The three source (S) pins of the eight-pin MOSFET are electrically connected to the eighth resistor, the ninth resistor, the fourth capacitor, and the AC-DC interface. The other end of the fourth capacitor is connected to the gate (G) pin of the eight-pin MOSFET. The other end of the eighth resistor is electrically connected to the gate (G) pin of the eight-pin MOSFET and the tenth resistor. The other end of the tenth resistor is electrically connected to the drain (D) of the fourth N-MOS transistor. The other end of the ninth resistor is electrically connected to the eleventh resistor and the gate (G) of the fourth N-MOS transistor. The other end of the eleventh resistor and the source (S) of the fourth N-MOS transistor are both grounded.

8. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to any one of claims 1-4, characterized in that, The first dual P-MOS includes a third P-MOS and a fourth P-MOS; The source (S) of the third P-MOS and the source (S) of the fourth P-MOS are electrically connected. The gate (G) of both the third and fourth P-MOS is electrically connected to the drain (D) of the first N-MOS. The drain of the third P-MOS is connected to the output terminal of the DC-DC module, and the drain of the fourth P-MOS is connected to the input terminal of the current limiting IC. The source (S) of both the third and fourth P-MOS are also electrically connected to a twelfth resistor. The other end of the twelfth resistor is electrically connected to the gate (G) of the third and fourth P-MOS, the gate (G) of the fourth P-MOS, and a fifth capacitor. The other end of the fifth capacitor is grounded.

9. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to claim 8, characterized in that, The gate (G) of the first N-MOS is electrically connected to the thirteenth and fourteenth resistors. The other end of the thirteenth resistor is electrically connected to the drain (D) of the P-MOS. The source (S) of the first N-MOS is grounded, and the other end of the fourteenth resistor is grounded.

10. The intelligent power strip switching circuit for 220V AC power supply and TYPE-C power supply according to any one of claims 1-4, characterized in that, The current limiting IC includes a current limiting module, a fifteenth resistor, a sixteenth resistor, a sixth capacitor, a seventh capacitor, and an eighth capacitor. The VIN pin of the current limiting module is electrically connected to the input terminal of the current limiting IC, the fifteenth resistor, and the sixth capacitor. The GND pin of the current limiting module is grounded. The EN pin of the current limiting module is electrically connected to the other end of the fifteenth resistor, and the other end of the sixth capacitor is grounded. The VOUT pin of the current limiting module is electrically connected to the output terminal of the current limiting IC, the seventh capacitor, and the eighth capacitor. The ILIM pin of the current limiting module is electrically connected to the sixteenth resistor, and the other end of the sixteenth resistor, the other end of the seventh capacitor, and the other end of the eighth capacitor are grounded.

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