Conversion connector and circuit thereof

Abstract

The utility model belongs to the field of conversion connectors, relates to a conversion connector and a circuit thereof, and discloses a conversion connector circuit, which comprises an input port module, an output port module, a protocol module, a first switch module and a second switch module, the first switch module and the second switch module are both connected to the voltage end of the input port module, and the first switch module and the second switch module are selectively conducted with the input port module; the voltage output end of the first switch module, the protocol module and the output port module are communicated in sequence, and the second switch module is communicated with the output port module; the second switch module is also communicated with a third switch module, and the third switch module is respectively communicated with the input port module and the output port module; according to the scheme, the conversion connector can selectively switch the connection mode of only charging or only data transmission in real time according to the output voltage of different main connection products and the working mode of the connected product, and the compatibility and practicability of the product are improved.

Description

Technical Field

[0001] The utility model relates to the field of conversion connectors, in particular to a conversion connector and its circuit. Background Art

[0002] In various electrical products, there are various interface standards for products. To interconnect interfaces of different standards, a conversion connector is required. As a transfer component, the conversion connector is respectively connected to interfaces of different standards and performs signal conversion through its internal circuit to achieve the interconnection and interoperability of interfaces of different standards.

[0003] Currently, most conversion connectors can only convert or adjust the voltage magnitude and signal type at both ends through their internal circuits, so that the conversion connectors are divided into three connection modes: only charging, only data transmission, and both charging and data transmission according to the effects. However, due to factors such as production process, cost, or use safety of some connected products, their different working modes cannot work simultaneously. For example, when the input voltage of the connected product is relatively small, only data transmission is performed without charging; relatively, when the input voltage of the connected product is relatively large, only charging is performed without data transmission.

[0004] Combined with the above situation, it can be seen that regardless of whether the output voltage of the main connected product is relatively large or relatively small, the conversion connector that both charges and transmits data will perform dual transmission of power and data in real time, resulting in the inability of the above types of connected products to use the conversion connector that both charges and transmits data, and only the conversion connector that only charges or only transmits data can be used. However, whenever the working mode of the connected product changes or the output voltage of the main connected product changes, the used conversion connector needs to be replaced synchronously to make the input voltage, connection mode of the conversion connector, and working mode of the connected product match each other. Thus, it can be seen that the circuit in the current conversion connector cannot selectively switch between the connection modes of only charging or only data transmission in real time according to the output voltage of different main connected products and the working mode of the connected product, resulting in poor compatibility and practicability of the product. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a conversion connector and its circuit, which can selectively switch between the connection modes of only charging or only data transmission in real time according to the output voltage of different main connected products and the working mode of the connected product, and improve the compatibility and practicability of the product.

[0006] The utility model provides a technical solution: a conversion connector circuit, including an input port module and an output port module, and a protocol module, a triggerable first switch module, and a second switch module are provided between the input port module and the output port module;

[0007] The voltage input terminals and signal input terminals of both the first switch module and the second switch module are connected to the voltage terminal of the input port module. The trigger voltage thresholds of the first switch module and the second switch module are different from each other, and their voltage input terminals are respectively connected to the input port module in an alternative manner;

[0008] The voltage output terminal of the first switch module, the protocol module, and the voltage terminal of the output port module are connected in sequence. The voltage output terminal of the second switch module is connected to the voltage terminal of the output port module;

[0009] The voltage output terminal of the second switch module is also connected to a triggerable third switch module. The third switch module is respectively connected to the data terminal of the input port module and the data terminal of the output port module.

[0010] In the above conversion connector circuit, a first under-voltage lockout unit is provided on the first switch module;

[0011] The first under-voltage lockout unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module. The signal input terminal of the first under-voltage lockout unit is connected to the voltage terminal of the input port module;

[0012] A first over-voltage lockout unit is provided on the second switch module;

[0013] The first over-voltage lockout unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the first over-voltage lockout unit is connected to the voltage terminal of the input port module;

[0014] The voltage threshold of the first under-voltage lockout unit is not less than the voltage threshold of the first over-voltage lockout unit.

[0015] In the above conversion connector circuit, the first under-voltage lockout unit includes a first under-voltage lockout main body, a first voltage-dividing resistor, and a second voltage-dividing resistor;

[0016] The first voltage-dividing resistor and the second voltage-dividing resistor are used to form the voltage threshold of the first under-voltage lockout unit; the voltage terminal of the input port module, the first voltage-dividing resistor, and the second voltage-dividing resistor are connected in sequence and grounded;

[0017] The first under-voltage lockout main body is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the first under-voltage lockout main body is connected to the voltage output terminal of the first voltage-dividing resistor;

[0018] The first over-voltage lockout unit includes a first over-voltage lockout main body, a third voltage-dividing resistor, and a fourth voltage-dividing resistor;

[0019] The third voltage-dividing resistor and the fourth voltage-dividing resistor are used to form the voltage threshold of the first overvoltage locking unit; the voltage terminal of the input port module, the third voltage-dividing resistor, and the fourth voltage-dividing resistor are connected in sequence and grounded.

[0020] The first overvoltage locking main body is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the first overvoltage locking main body is connected to the voltage output terminal of the third voltage-dividing resistor.

[0021] In the above conversion connector circuit, a second overvoltage locking unit is further provided on the first switch module;

[0022] The second overvoltage locking unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the second overvoltage locking unit is connected to the voltage terminal of the input port module;

[0023] The voltage threshold of the second overvoltage locking unit is greater than the voltage threshold of the first undervoltage locking unit.

[0024] In the above conversion connector circuit, the second overvoltage locking unit includes a second overvoltage locking main body, a fifth voltage-dividing resistor, and a sixth voltage-dividing resistor;

[0025] The fifth voltage-dividing resistor and the sixth voltage-dividing resistor are used to form the voltage threshold of the second overvoltage locking unit; the voltage terminal of the input port module, the fifth voltage-dividing resistor, and the sixth voltage-dividing resistor are connected in sequence and grounded;

[0026] The second overvoltage locking main body is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the second overvoltage locking main body is connected to the voltage output terminal of the fifth voltage-dividing resistor.

[0027] In the above conversion connector circuit, a second undervoltage locking unit is further provided on the second switch module;

[0028] The second undervoltage locking unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the second undervoltage locking unit is connected to the voltage terminal of the input port module;

[0029] The voltage threshold of the second undervoltage locking unit is less than the voltage threshold of the first overvoltage locking unit.

[0030] In the above conversion connector circuit, the second undervoltage locking unit includes a second undervoltage locking main body, a seventh voltage-dividing resistor, and an eighth voltage-dividing resistor;

[0031] The seventh voltage-dividing resistor and the eighth voltage-dividing resistor are used to form the voltage threshold of the second undervoltage locking unit; the voltage terminal of the input port module, the seventh voltage-dividing resistor, and the eighth voltage-dividing resistor are connected in sequence and grounded.

[0032] The second undervoltage locking body is used to control the on / off of the voltage input end and the voltage output end of the second switch module; the signal input end of the second undervoltage locking body is connected to the voltage output end of the seventh voltage-dividing resistor.

[0033] In the above conversion connector circuit, a first filter rectification module is further included; the voltage input end of the first filter rectification module is connected to the voltage terminal of the input port module, and the voltage output end of the first filter rectification module is respectively connected to the voltage input ends and data input ends of both the first switch module and the second switch module, and the voltage input ends of both the first switch module and the second switch module are respectively conducted with the first filter rectification module in an alternative manner.

[0034] In the above conversion connector circuit, a second filter rectification module is further included; the voltage input end of the second filter rectification module is connected to the voltage output end of the second switch module, and the voltage output end of the second filter rectification module is respectively connected to the voltage input end and the signal input end of the third switch module.

[0035] Another technical solution provided by the present utility model is: a conversion connector, including a housing and a circuit board disposed inside the housing, wherein the circuit board is provided with the above conversion connector circuit, and the housing is fixedly connected to the outer surface of the circuit board in a wrapping manner.

[0036] After the present utility model adopts the above technical solution, the beneficial effects thereof are:

[0037] In this technical solution, by sequentially connecting the voltage terminals of the input port module, the first switch module, the protocol module, and the output port module, a first branch for charging the connected product is formed. The signal input end of the first switch module is connected to the voltage terminal of the input port, and the signal input end of the first switch module is used to trigger the on / off between the voltage input end and the voltage output end of the first switch module according to the voltage value at this place. When the voltage input end and the voltage output end of the first switch module are conducted, the first branch becomes a conducting state, and at this time, it is the working mode of only charging the connected product.

[0038] The second branch for transmitting data to the connected product consists of two branch paths. The voltage terminals of the input port module, the second switch module, and the output port module are connected in sequence to form the first branch path for powering on the connected product. After the connected product is powered on, it can maintain basic operations such as receiving or sending data signals. The data terminals of the input port module, the third switch module, and the output port module are connected in sequence to form the second branch path for transmitting data. Similarly, the second switch module is triggered to turn on or off the voltage input terminal and the voltage output terminal through the voltage value at its signal input terminal. That is, when the voltage input terminal and the voltage output terminal of the second switch module are conducting, the first branch path becomes a conducting state, and at this time, the connected product is powered on. After the voltage input and output terminals of the second switch module are connected, a chain reaction also occurs between the second switch module and the third switch module, triggering the third switch module to change from the normally open state to the closed state, making the second branch path become a conducting state. At this time, the first branch path and the second branch path together constitute the working mode of only data transmission;

[0039] Among them, since the voltage value of the signal input terminal of the second switch module is also taken from the voltage terminal of the input port, that is, the voltages at the signal input terminal of the second switch module and the signal input terminal of the first switch module are the same, and the trigger voltage thresholds on the above two switch modules are different from each other, so that the same voltage can trigger one of the switch modules at the input port module, realizing that the conversion connector can selectively switch the connection mode of only charging or only data transmission in real time according to the output voltage of different main connected products and the working mode of the connected product, improving the compatibility and practicability of the product. Brief Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of the conversion connector circuit of Embodiment 1 of the present utility model;

[0041] Figure 2 is a schematic circuit diagram of the conversion connector circuit of Embodiment 1 of the present utility model;

[0042] Figure 3 is a schematic circuit diagram of the first filter rectifier module of Embodiment 1 of the present utility model;

[0043] Figure 4 is a schematic circuit diagram of the first switch module of Embodiment 1 of the present utility model;

[0044] Figure 5 is a schematic circuit diagram of the protocol module of Embodiment 1 of the present utility model;

[0045] Figure 6 is a schematic circuit diagram of the third switch module of Embodiment 1 of the present utility model;

[0046] Figure 7 It is a schematic circuit diagram of the second filter rectification module of Embodiment 1 of the present utility model;

[0047] Figure 8 It is a schematic circuit diagram of the second switch module of Embodiment 1 of the present utility model;

[0048] Figure 9 It is a schematic structural diagram of the input port module of Embodiment 1 of the present utility model;

[0049] Figure 10 It is a schematic structural diagram of the output port module of Embodiment 1 of the present utility model;

[0050] Figure 11 It is a schematic circuit diagram of the first undervoltage locking unit and the second overvoltage locking unit of Embodiment 1 of the present utility model;

[0051] Figure 12 It is a schematic circuit diagram of the first overvoltage locking unit and the second undervoltage locking unit of Embodiment 1 of the present utility model;

[0052] Figure 13 It is a schematic diagram of voltage threshold setting of the first switch module and the second switch module of Embodiment 1 of the present utility model;

[0053] Figure 14 It is a logic flow chart of the conversion connector circuit of Embodiment 1 of the present utility model;

[0054] Figure 15 It is a schematic structural diagram of the conversion connector of Embodiment 2 of the present utility model;

[0055] Figure 16 is of the present utility model Figure 15 Cross-sectional view along cutting line A-A.

[0056] Reference numerals: 1, first filter rectification module; 2, first switch module; 3, protocol module; 4, third switch module; 5, second filter rectification module; 6, second switch module; 7, housing; 8, circuit board;

[0057] 21, second overvoltage locking unit; 22, first undervoltage locking unit;

[0058] 61, first overvoltage locking unit; 62, second undervoltage locking unit; 71, groove. Detailed implementation manners

[0059] The following further elaborates on the technical solutions of the present utility model in combination with specific implementation manners, but does not constitute any limitation to the present utility model.

[0060] Embodiment 1:

[0061] As Figure 1-14 shown, the conversion connector circuit includes an input port module P1 and an output port module P2. A protocol module 3, a triggerable first switch module 2, and a second switch module 6 are provided between the input port module P1 and the output port module P2;

[0062] The voltage input terminals and signal input terminals of both the first switch module 2 and the second switch module 6 are connected to the voltage terminal of the input port module P1. The trigger voltage thresholds of the first switch module 2 and the second switch module 6 are different from each other, and their voltage input terminals are respectively conducted with the input port module P1 in an alternative manner;

[0063] The voltage output terminal of the first switch module 2, the protocol module 3, and the voltage terminal of the output port module P2 are sequentially connected. The voltage output terminal of the second switch module 6 is connected to the voltage terminal of the output port module P2;

[0064] The voltage output terminal of the second switch module 6 is also connected to a triggerable third switch module 4. The third switch module 4 is respectively connected to the data terminal of the input port module P1 and the data terminal of the output port module P2.

[0065] The working principle is that in this technical solution, the voltage terminals of the input port module P1, the first switch module 2, the protocol module 3, and the output port module P2 are sequentially connected to form a first branch for charging the connected product. The signal input terminal of the first switch module 2 is connected to the voltage terminal of the input port. The signal input terminal of the first switch module 2 is used to trigger the on-off between the voltage input terminal and the voltage output terminal of the first switch module 2 according to the voltage value at this place. When the voltage input terminal and the voltage output terminal of the first switch module 2 are conducted, the first branch becomes a conducting state. At this time, it is the working mode of only charging the connected product;

[0066] The second branch for transmitting data to the connected product is composed of two branch paths. The voltage terminals of the input port module P1, the second switch module 6, and the output port module P2 are connected in sequence to form the first branch path for powering on the connected product. After the connected product is powered on, it can maintain basic operations such as receiving or sending data signals. The data terminals of the input port module P1, the third switch module 4, and the output port module P2 are connected in sequence to form the second branch path for transmitting data. Similarly, the second switch module 6 is also triggered to turn on or off the voltage input terminal and the voltage output terminal through the voltage value at its signal input terminal, that is, when the voltage input terminal and the voltage output terminal of the second switch module 6 are conducted, the first branch path becomes a conducting state, and at this time, the connected product is powered on. After the voltage input and output terminals of the second switch module 6 are connected, a chain reaction also occurs between the second switch module 6 and the third switch module 4, triggering the third switch module 4 to change from the normally open state to the closed state, making the second branch path become a conducting state. At this time, the first branch path and the second branch path together constitute the working mode of only data transmission;

[0067] Among them, since the voltage value of the signal input terminal of the second switch module 6 is also taken from the voltage terminal of the input port, that is, the voltage at the signal input terminal of the second switch module 6 is the same as that at the signal input terminal of the first switch module 2, and the trigger voltage thresholds on the above two switch modules are different from each other, so that the same voltage can selectively trigger one of the switch modules at the input port module P1, enabling the conversion connector to selectively switch the connection mode of only charging or only data transmission in real time according to the output voltage of different main connected products and the working mode of the connected product, improving the compatibility and practicability of the product.

[0068] In a specific implementation, in this embodiment, taking the M12 interface and the TYPE-C interface as examples, the M12 interface is used as the input port module P1, and the TYPE-C interface is used as the output port module P2. Different branch paths are built between the M12 interface and the TYPE-C interface, and by controlling the real-time on-off of the required branch paths, the connection mode of the conversion connector can be selectively changed in real time, so that the input voltage, the connection mode, and the working mode of the connected product of the conversion connector are matched with each other.

[0069] Taking the M12 interface as an example, combined with Figure 2 and Figure 10 as shown, the input port module P1 is provided with four pins, namely the D-_in terminal of pin 1, the D+_in terminal of pin 2, the GND terminal of pin 3, and the VIN terminal of pin 4.

[0070] Taking the TYPE-C interface as an example, combined with Figure 2 and Figure 11As shown, the output port module P2 is provided with 6 pins, namely the D-_OUT terminal of pin 1, the D+_OUT terminal of pin 2, the CC1 terminal of pin 3, the CC2 terminal of pin 4, the GND terminal of pin 5, and the V_OUT terminal of pin 6.

[0071] It should be noted that since no matter what type of industrial interface and data interface are adopted, it has no impact on building the above-mentioned branch. The input port module P1 can be selected as an M12 interface, or can also be selected as different types of industrial interfaces such as RJ45 interface and DB9 interface, while the output port module P2 can be selected as a TYPE-C interface, or can also be selected as Micro USB, and can also be selected as different types of data interfaces such as USB-A; in addition, in addition to the mainstream types listed above for industrial interfaces and data interfaces, other non-mainstream types of industrial interfaces and data interfaces can also be adopted. This embodiment does not impose too many restrictions on the type specifications of the input port module P1 and the output port module P2.

[0072] Combined with Figure 2 and Figure 5 As shown, the protocol module 3 includes a chip U3, capacitors C13 - C20, a resistor R15, and an inductor L1; the chip U3 is provided with nine pins, namely the Vout terminal of pin 1, the Vin terminal of pin 2, the SW terminal of pin 3, the BST terminal of pin 4, the DM terminal of pin 5, the DP terminal of pin 6, the CC1 terminal of pin 7, the CC2 terminal of pin 8, and the EPAD terminal of pin 9.

[0073] In the specific connection, the EPAD terminal of the chip U3 is grounded, the CC1 terminal of the chip U3 is connected to the CC1 of the output port module P2, the CC2 terminal of the chip U3 is connected to the CC2 terminal of the output port module P2, the DM terminal of the chip U3 is connected to the D-_OUT terminal of the output port module P2, the DP terminal of the chip U3 is connected to the D+_OUT terminal of the output port module P2, the capacitor C20 is respectively connected to the BST terminal and the SW terminal of the chip U3, the SW terminal of the chip U3, the resistor R15, and the capacitor C17 are connected in sequence and grounded; the inductor L1 is respectively connected to the SW terminal and the Vout terminal of the chip U3; the Vout terminal of the chip U3 is also connected to a capacitor C13, and the capacitor C13 is grounded; the capacitors C14 - C16, C18, and C19 are all connected in parallel with the capacitor C13; the voltage input terminal of the capacitor C18 is connected to the V_OUT terminal of the output port module P2; the Vin terminal of the chip U3 is connected to the voltage output terminal of the first switch module 2 (specifically, the 13 - 15 pins of the chip U4).

[0074] The DP terminal and the DM terminal of the above chip U3 are used to transmit the handshake communication signal of the chip U3 with the load device during the charging working mode.

[0075] Combined with Figure 2 andFigure 6 As shown in the figure, the third switch module 4 includes a chip U2, a resistor R1, a capacitor C6, and a resistor R5. The chip U2 has 10 pins, namely the S1 terminal of pin 1, the S2 terminal of pin 2, the NC terminal of pin 3, the GND terminal of pin 4, the VDD terminal of pin 5, the IN2 terminal of pin 6, the IN1 terminal of pin 7, the VSS terminal of pin 8, the D2 terminal of pin 9, and the D1 terminal of pin 10.

[0076] In the specific connection, the S1 terminal of the chip U2 is connected to the D+_in terminal of the input port module P1, the S2 terminal of the chip U2 is connected to the D-_in terminal of the input port module P1, the GND terminal of the chip U2 is grounded, the VDD terminal of the chip U2 is connected to the voltage output terminal of the second switch module 6 (specifically, pins 13 - 15 of the chip U1), one end of the resistor R1 is connected to the VDD terminal of the chip U2, and the other end is respectively connected to the IN1 and IN2 terminals of the chip U2. The capacitor C6 and the resistor R5 are both connected in parallel with the resistor R1. The VSS terminal of the chip U2 is grounded, the D2 terminal of the chip U2 is connected to the D-_OUT of the input port module P1, and the D1 terminal of the chip U2 is connected to the D+_OUT terminal of the input port module P1.

[0077] The S1 terminal and the S2 terminal of the above chip U2 are used to transmit communication data signals to and from the load device in the data transmission only working mode.

[0078] In this embodiment, as shown in Figure 2 and Figure 4 a first undervoltage lockout unit 22 is provided on the first switch module 2.

[0079] The first undervoltage lockout unit 22 is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module 2. The signal input terminal of the first undervoltage lockout unit 22 is connected to the voltage terminal of the input port module P1.

[0080] As shown in Figure 2 and Figure 8 in this embodiment, a first overvoltage lockout unit 61 is provided on the second switch module 6.

[0081] The first overvoltage lockout unit 61 is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module 6. The signal input terminal of the first overvoltage lockout unit 61 is connected to the voltage terminal of the input port module P1.

[0082] The voltage threshold of the first undervoltage lockout unit 22 is not less than the voltage threshold of the first overvoltage lockout unit 61.

[0083] During operation, the first switch module 2 adopts an under-voltage lockout (UVLO) circuit structure, that is, when the input voltage value reaches the voltage threshold of the first under-voltage lockout unit 22, the circuit inside the first switch module 2 conducts (i.e., closes); the second switch module 6 adopts an over-voltage lockout (OVLO) circuit structure, that is, when the input voltage value reaches the voltage threshold of the first over-voltage lockout unit 61, the circuit of the second switch module 6 disconnects; and the voltage threshold of the first under-voltage lockout unit 22 is set to be not greater than the voltage threshold of the first over-voltage lockout unit 61. When the value of the input voltage is greater than the voltage threshold of the first under-voltage lockout unit 22, it will be greater than the voltage threshold of the first over-voltage lockout unit 61. Conversely, when the value of the input voltage is less than the voltage threshold of the first under-voltage lockout unit 22, it will also be less than the voltage threshold of the first over-voltage lockout unit 61. Thus, it can be seen that the input voltage can only match the set voltage threshold of one of the above two switch modules. Whenever the input voltage is delivered to the first switch module 2 and the second switch module 6, after the two switch modules simultaneously judge the magnitude of the input voltage value, one of the switch modules whose set voltage threshold matches the value of the input voltage conducts with the input port module P1, forming a trigger mechanism for one of the first switch module 2 and the second switch module 6 to conduct.

[0084] As Figure 4 shown, the specific structure of the first under-voltage lockout unit 22 is that the first under-voltage lockout unit 22 includes a first under-voltage lockout main body, a first voltage-dividing resistor R11, and a second voltage-dividing resistor R12;

[0085] The first voltage-dividing resistor R11 and the second voltage-dividing resistor R12 are used to form the voltage threshold of the first under-voltage lockout unit 22; the voltage terminal of the input port module P1, the first voltage-dividing resistor R11, and the second voltage-dividing resistor R12 are connected in sequence and grounded;

[0086] The first under-voltage lockout main body is used to control the on-off of the voltage input end and the voltage output end of the first switch module 2; the signal input end of the first under-voltage lockout main body is connected to the voltage output end of the first voltage-dividing resistor R11;

[0087] As Figure 8 shown, the specific structure of the first over-voltage lockout unit 61 is that the first over-voltage lockout unit 61 includes a first over-voltage lockout main body, a third voltage-dividing resistor R4, and a fourth voltage-dividing resistor R3;

[0088] The third voltage-dividing resistor R4 and the fourth voltage-dividing resistor R3 are used to form the voltage threshold of the first over-voltage lockout unit 61; the voltage terminal of the input port module P1, the third voltage-dividing resistor R4, and the fourth voltage-dividing resistor R3 are connected in sequence and grounded;

[0089] The first overvoltage locking main body is used to control the on / off of the voltage input end and the voltage output end of the second switch module 6; the signal input end of the first overvoltage locking main body is connected to the voltage output end of the third voltage-dividing resistor R4.

[0090] Combined with Figure 4 and Figure 11 As shown, in the implementation application, the first undervoltage locking main body is arranged inside the chip U4 and includes a comparator C1 and a power switch K1 (such as a MOS transistor). The voltage input end of the first switch module 2, the power switch K1, and the voltage output end of the first switch module 2 are connected in sequence. The voltage input end of the first voltage-dividing resistor R11 serves as one of the signal input ends of the first switch module 2 and is connected to the voltage input end of the first switch module 2. The voltage output end of the first voltage-dividing resistor R11 is connected to the positive electrode of the comparator C1. The voltage input end of the second voltage-dividing resistor R12 is connected to the voltage output end of the first voltage-dividing resistor R11, and the voltage output end of the second voltage-dividing resistor R12 is grounded. The signal output end of the comparator C1 is connected to the signal input end of the power switch K1. At this time, the voltage threshold (UVLO) of the first undervoltage locking unit 22 is the voltage VT1 of the negative electrode of the comparator C1 × [(the first voltage-dividing resistor R11 + the second voltage-dividing resistor R12) / the second voltage-dividing resistor R12], where the negative electrode of the comparator C1 is equivalent to the UVLO end of the first switch module 2 (i.e., pin 4 of the chip U4).

[0091] Similarly, combined with Figure 8 and Figure 12 As shown, the first overvoltage locking main body is arranged inside the chip U1 and includes a comparator C4 and a power switch K2 (such as a MOS transistor). The voltage input end of the second switch module 6, the power switch K2, and the voltage output end of the second switch module 6 are connected in sequence. The voltage input end of the third voltage-dividing resistor R4 serves as one of the signal input ends of the second switch module 6 and is connected to the voltage input end of the second switch module 6. The voltage output end of the third voltage-dividing resistor R4 is connected to the negative electrode of the comparator C4. The voltage input end of the fourth voltage-dividing resistor R3 is connected to the voltage output end of the third voltage-dividing resistor R4, and the voltage output end of the fourth voltage-dividing resistor R3 is grounded. The signal output end of the comparator C4 is connected to the signal input end of the power switch K2. At this time, the voltage threshold (OVLO) of the first overvoltage locking unit 61 is the voltage VT4 of the negative electrode of the comparator C4 × [(the third voltage-dividing resistor R4 + the fourth voltage-dividing resistor R3) / the fourth voltage-dividing resistor R3], where the positive electrode of the comparator C4 is equivalent to the OVLO end of the second switch module 6 (i.e., pin 5 of the chip U1).

[0092] In some embodiments, combined with Figure 2 and Figure 4 As shown, a second overvoltage locking unit 21 is further arranged on the first switch module 2;

[0093] The second overvoltage locking unit 21 is used to control the on / off of the voltage input end and the voltage output end of the first switching module 2; the signal input end of the second overvoltage locking unit 21 is connected to the voltage end of the input port module P1;

[0094] The voltage threshold of the second overvoltage locking unit 21 is greater than the voltage threshold of the first undervoltage locking unit 22.

[0095] As Figure 4 shown, the specific structure of the second overvoltage locking unit 21 is that the second overvoltage locking unit 21 includes a second overvoltage locking main body, a fifth voltage-dividing resistor R10 and a sixth voltage-dividing resistor R13;

[0096] The fifth voltage-dividing resistor R10 and the sixth voltage-dividing resistor R13 are used to form the voltage threshold of the second overvoltage locking unit 21; the voltage end of the input port module P1, the fifth voltage-dividing resistor R10, and the sixth voltage-dividing resistor R13 are connected in sequence and grounded;

[0097] The second overvoltage locking main body is used to control the on / off of the voltage input end and the voltage output end of the first switching module 2; the signal input end of the second overvoltage locking main body is connected to the voltage output end of the fifth voltage-dividing resistor R10.

[0098] Combined with Figure 4 and Figure 11 shown, in the implementation application, the second overvoltage locking main body is arranged inside the chip U4 and includes a comparator C2 and a power switch K1 (such as a MOS transistor). The voltage input end of the first switching module 2, the power switch K1, and the voltage output end of the first switching module 2 are connected in sequence. The voltage input end of the fifth voltage-dividing resistor R10 is used as one of the signal input ends of the first switching module 2 and is connected to the voltage input end of the first switching module 2. The voltage output end of the fifth voltage-dividing resistor R10 is connected to the negative pole of the comparator C2. The voltage input end of the sixth voltage-dividing resistor R13 is connected to the voltage output end of the fifth voltage-dividing resistor R10, and the voltage output end of the sixth voltage-dividing resistor R13 is grounded. The signal output end of the comparator C2 is connected to the signal input end of the power switch K1. At this time, the voltage threshold (OVLO) of the second overvoltage locking unit 21 is the voltage VT2 of the positive pole of the comparator C2 × [(the fifth voltage-dividing resistor R10 + the sixth voltage-dividing resistor R13) / the sixth voltage-dividing resistor R13], where the positive pole of the comparator C2 is equivalent to the OVLO end of the first switching module 2 (i.e., the pin 5 of the chip U4).

[0099] In some embodiments, combined with Figure 2 and Figure 8 shown, a second undervoltage locking unit 62 is also arranged in the second switching module 6;

[0100] The second undervoltage locking unit 62 is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module 6; the signal input terminal of the second undervoltage locking unit 62 is connected to the voltage terminal of the input port module P1;

[0101] The voltage threshold of the second undervoltage locking unit 62 is less than the voltage threshold of the first overvoltage locking unit 61.

[0102] As Figure 8 shown, the specific structure of the second undervoltage locking unit 62 is that the second undervoltage locking unit 62 includes a second undervoltage locking main body, a seventh voltage dividing resistor R9 and an eighth voltage dividing resistor R8;

[0103] The seventh voltage dividing resistor R9 and the eighth voltage dividing resistor R8 are used to form the voltage threshold of the second undervoltage locking unit 62; the voltage terminal of the input port module P1, the seventh voltage dividing resistor R9, and the eighth voltage dividing resistor R8 are connected in sequence and grounded;

[0104] The second undervoltage locking main body is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module 6; the signal input terminal of the second undervoltage locking main body is connected to the voltage output terminal of the seventh voltage dividing resistor R9.

[0105] Combined with Figure 8 and Figure 12 shown, the second undervoltage locking main body is arranged inside the chip U1 and includes a comparator C3 and a power switch K2 (such as a MOS transistor). The voltage input terminal of the second switch module 6, the power switch K2, and the voltage output terminal of the second switch module 6 are connected in sequence. The voltage input terminal of the seventh voltage dividing resistor R9 serves as one of the signal input terminals of the second switch module 6 and is connected to the voltage input terminal of the second switch module 6. The voltage output terminal of the seventh voltage dividing resistor R9 is connected to the positive pole of the comparator C3. The voltage input terminal of the eighth voltage dividing resistor R8 is connected to the voltage output terminal of the third voltage dividing resistor R4, and the voltage output terminal of the eighth voltage dividing resistor R8 is grounded. The signal output terminal of the comparator C3 is connected to the signal input terminal of the power switch K2. At this time, the voltage threshold (UVLO) of the second undervoltage locking unit 62 is the voltage VT3 of the positive pole of the comparator C3 × [(seventh voltage dividing resistor R9 + eighth voltage dividing resistor R8) /

[0106] eighth voltage dividing resistor R8], where the negative pole of the comparator C3 is equivalent to the UVLO terminal of the second switch module 6 (i.e., pin 4 of the chip U1).

[0107] Combined with Figure 2 and Figure 3As shown, preferably, it further includes a first filter rectification module 1; the voltage input terminal of the first filter rectification module 1 is connected to the voltage terminal of the input port module P1, and the voltage output terminal of the first filter rectification module 1 is respectively connected to the voltage input terminals and data input terminals of both the first switch module 2 and the second switch module 6. The voltage input terminals of both the first switch module 2 and the second switch module 6 are respectively conducted with the first filter rectification module 1 in an alternative manner.

[0108] In this embodiment, the first filter rectification module 1 includes a voltage stabilizing diode D1, a capacitor C21, an inductor L2, capacitors C5, C10, C11, C12 and C9 connected in parallel with each other; the voltage output terminal of the voltage stabilizing diode D1 is connected to the voltage terminal of the input port module P1P1. In a specific connection, the voltage output terminal of the voltage stabilizing diode D1 is connected to the voltage input terminal VIN of the input port module P1 (i.e., the pin 4 of the input port module P1P1), the voltage input terminal of the voltage stabilizing diode D1 is grounded, the capacitor C21 is connected in parallel with the voltage stabilizing diode D1, the inductor L2 is respectively connected to the voltage output terminal of the voltage stabilizing diode D1 and the voltage input terminal of the capacitor C5, the voltage output terminal of the capacitor C5 is grounded, the capacitors C10, C11, C12 are respectively connected in parallel with the capacitor C5, and the voltage input terminal of the capacitor C12 is respectively connected to the voltage input terminal VIN of the second switch module 6 (specifically, the pins 1 - 3 of the chip U1) and the signal input terminal (i.e., the signal input terminals of the first overvoltage locking unit 61 and the second undervoltage locking unit 62). Among them, the signal input terminal of the first overvoltage locking unit 61 is specifically the voltage input terminal of the resistor R4, and the signal input terminal of the second undervoltage locking unit 62 is specifically the voltage input terminal of the resistor R9. When the input voltage is relatively large or small, the second switch module 6 can disconnect the circuit inside the second switch module 6, so that the first overvoltage locking unit 61 can switch to the first switch module 2 to work in cooperation with the first undervoltage locking unit 22 of the first switch module 2. In some embodiments, the voltage input terminal of the capacitor C12 is only connected to the voltage input terminal of the resistor R4, and the voltage input terminal of the resistor R9 is disconnected, that is, the second switch module 6 only disconnects its internal circuit when the input voltage is relatively large, meeting the purpose of switching the first switch module 2, and when the input voltage is relatively small, it does not control the on - off of the voltage at both ends of the second switch module 6.

[0109] Combined Figure 2 and Figure 7 As shown, another preference is that it further includes a second filter rectification module 5; the voltage input terminal of the second filter rectification module 5 is connected to the voltage output terminal of the second switch module 6, and the voltage output terminal of the second filter rectification module 5 is respectively connected to the voltage input terminal and the signal input terminal of the third switch module 4.

[0110] In this embodiment, the second filter rectification module 5 includes a resistor R7, capacitors C2, C1, C8, C3, and C7; the voltage input terminal of capacitor C2 is connected to the voltage output terminal OUT of the second switch module 6 (i.e., pins 13 - 15 of chip U1), the voltage output terminal of capacitor C2 is connected to the CLMODE terminal of the second switch module 6 (specifically, pin 6 of chip U1), the voltage input terminal of resistor R7 is connected to the voltage output terminal of capacitor C2, and the voltage output terminal is connected to the SETI terminal of the second switch module 6 (specifically, pin 7 of chip U1), capacitors C1, C8, C3, and C7 are respectively connected in parallel with capacitor C2, and the voltage input terminal of capacitor C7 is respectively connected to the voltage input terminal VDD of the third switch module 4 (specifically, pin 5 of chip U2) and the signal input terminal (specifically, the voltage input terminals of resistor R1 and resistor R5).

[0111] Embodiment 2:

[0112] Combined Figure 15 with Figure 16 As shown, this embodiment also provides a conversion connector, which includes a housing 7 and a circuit board 8 disposed inside the housing 7. The circuit board 8 is provided with the conversion connector circuit as described in Embodiment 1, and the housing 7 is fixedly connected to the outer surface of the circuit board 8 in a wrapped manner.

[0113] In actual processing, the housing 7 uses a double - injection - molding encapsulation process to wrap the circuit board 8 360°, and is fixedly connected to the outer surface of the circuit board 8 through its own curing, so that the circuit board 8 is fixed inside the housing 7. At this time, the structure between the outer surface of the housing 7 and the outer surface of the circuit board 8 is solid. Compared with the hollow structure between the traditional housing 7 and the circuit board 8, it has better anti - impact and anti - vibration effects; in addition, there is an air barrier between the circuit board 8 and the housing 7 in the above - mentioned hollow structure, and the thermal conductivity of air is about one - tenth of that of the plastic raw material. Compared with this hollow structure, the housing 7 of this technical solution wraps the circuit board 8, changing the heat dissipation method to plastic heat conduction, and at the same time increasing the contact area with the circuit board 8, making this product have relatively excellent sealing and heat dissipation performance.

[0114] In the selection of materials, the material of the housing 7 is preferably TPU material. The TPU material has the comprehensive advantages of relatively high thermal conductivity and low cost. In addition, it can also be replaced with a heat - conducting material, and this embodiment does not limit this too much.

[0115] In addition, the outer surface of the housing 7 is also provided with grooves 71 for increasing the heat dissipation area. Among them, the groove 71 structure can be replaced with a convex structure, and this embodiment does not limit the concave - convex structure of the outer surface of the housing 7 too much.

[0116] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A conversion connector circuit, comprising an input port module and an output port module, characterized in that: A protocol module, a triggerable first switch module and a second switch module are provided between the input port module and the output port module; The voltage input terminals and signal input terminals of the first switch module and the second switch module are both connected to the voltage terminal of the input port module, the trigger voltage thresholds of the first switch module and the second switch module are different from each other, and the voltage input terminals of the two are respectively connected to the input port module in a selective manner; The voltage output end of the first switch module, the protocol module and the voltage end of the output port module are connected in sequence, and the voltage output end of the second switch module is connected to the voltage end of the output port module; The voltage output end of the second switch module is also connected to a triggerable third switch module, and the third switch module is respectively connected to the data end of the input port module and the data end of the output port module.

2. The conversion connector circuit according to claim 1, characterized in that: The first switch module is provided with a first undervoltage lockout unit; The first undervoltage lockout unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module, and the signal input terminal of the first undervoltage lockout unit is connected to the voltage terminal of the input port module; The second switch module is provided with a first overvoltage locking unit; The first overvoltage locking unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the first overvoltage locking unit is connected to the voltage terminal of the input port module; A voltage threshold of the first undervoltage lockout unit is not less than a voltage threshold of the first overvoltage lockout unit.

3. The conversion connector circuit according to claim 2, characterized in that: The first undervoltage lockout unit includes a first undervoltage lockout body, a first voltage-dividing resistor and a second voltage-dividing resistor; The first voltage-dividing resistor and the second voltage-dividing resistor are used to form a voltage threshold of the first undervoltage lockout unit; the voltage end of the input port module, the first voltage-dividing resistor, and the second voltage-dividing resistor are connected in sequence and grounded; The first undervoltage lockout body is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the first undervoltage lockout body is connected to the voltage output terminal of the first voltage-dividing resistor; The first overvoltage lockout unit includes a first overvoltage lockout body, a third voltage-dividing resistor and a fourth voltage-dividing resistor; The third voltage-dividing resistor and the fourth voltage-dividing resistor are used to form a voltage threshold of the first overvoltage locking unit; the voltage end of the input port module, the third voltage-dividing resistor, and the fourth voltage-dividing resistor are connected in sequence and grounded; The first overvoltage lockout body is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the first overvoltage lockout body is connected to the voltage output terminal of the third voltage-dividing resistor.

4. The conversion connector circuit according to claim 2, characterized in that: The first switch module is also provided with a second overvoltage locking unit; The second overvoltage locking unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the second overvoltage locking unit is connected to the voltage terminal of the input port module; A voltage threshold of the second overvoltage lockout unit is greater than a voltage threshold of the first undervoltage lockout unit.

5. The conversion connector circuit according to claim 4, characterized in that: The second overvoltage lockout unit includes a second overvoltage lockout body, a fifth voltage-dividing resistor and a sixth voltage-dividing resistor; The fifth voltage-dividing resistor and the sixth voltage-dividing resistor are used to form a voltage threshold of the second overvoltage locking unit; the voltage end of the input port module, the fifth voltage-dividing resistor, and the sixth voltage-dividing resistor are connected to the ground in sequence; The second overvoltage lockout body is used to control the on / off of the voltage input terminal and the voltage output terminal of the first switch module; the signal input terminal of the second overvoltage lockout body is connected to the voltage output terminal of the fifth voltage-dividing resistor.

6. The conversion connector circuit according to claim 2, characterized in that: The second switch module is also provided with a second undervoltage lockout unit; The second undervoltage lockout unit is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the second undervoltage lockout unit is connected to the voltage terminal of the input port module; A voltage threshold of the second undervoltage lockout unit is smaller than a voltage threshold of the first overvoltage lockout unit.

7. The conversion connector circuit according to claim 6, characterized in that: The second undervoltage lockout unit includes a second undervoltage lockout body, a seventh voltage-dividing resistor and an eighth voltage-dividing resistor; The seventh voltage-dividing resistor and the eighth voltage-dividing resistor are used to form a voltage threshold of the second undervoltage lockout unit; the voltage end of the input port module, the seventh voltage-dividing resistor, and the eighth voltage-dividing resistor are connected in sequence and grounded; The second undervoltage lockout body is used to control the on / off of the voltage input terminal and the voltage output terminal of the second switch module; the signal input terminal of the second undervoltage lockout body is connected to the voltage output terminal of the seventh voltage-dividing resistor.

8. The conversion connector circuit according to any one of claims 1 to 7, characterized in that: It also includes a first filtering and rectifying module; the voltage input end of the first filtering and rectifying module is connected to the voltage end of the input port module, the voltage output end of the first filtering and rectifying module is respectively connected to the voltage input end and the data input end of the first switch module and the second switch module, and the voltage input ends of the first switch module and the second switch module are respectively connected to the first filtering and rectifying module in an alternative manner.

9. The conversion connector circuit according to any one of claims 1 to 7, characterized in that: It also includes a second filtering and rectifying module; the voltage input end of the second filtering and rectifying module is connected to the voltage output end of the second switch module, and the voltage output end of the second filtering and rectifying module is respectively connected to the voltage input end and the signal input end of the third switch module.

10. A conversion connector, comprising a housing and a circuit board arranged in the housing, characterized in that: The circuit board is provided with a conversion connector circuit as described in any one of claims 1 to 9, and the shell is fixedly connected to the outer surface of the circuit board in a wrapping manner.

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