Anti-misplug protection module, interface power supply circuit and electronic equipment
By adding parallel diodes to the interface power supply circuit, the problems of high cost of preventing error plugging and unstable voltage in the prior art are solved, and low-cost and stable interface plugging and protection are achieved.
Patent Information
- Application Number
- CN202420543680.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-19
AI Technical Summary
When the prior art realizes interface anti-interpolation protection, there are problems of high costs and unstable voltages, which affects the normal operation of the equipment.
The parallel diode is added in the interface power supply circuit, the anode is connected to the current limiting output end of the current limiting switch, and the cathode is connected to the power supply output end, which is used to reduce the forward voltage drop and prevent voltage fluctuations caused by sudden load changes.
It realizes that while ensuring the stable interface function, it prevents voltage fluctuations caused by misplugging at low cost, and avoids interface damage and equipment failure.
Smart Images
Figure CN222464153U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of power electronics technology, and in particular to an anti-misinsertion protection module, an interface power supply circuit, and an electronic device. Background Art
[0002] With the development of economy and the advancement of science and technology, users have more and more demands for consumer electronics, which makes the interfaces of most consumer electronics become diverse. Take the Type-C interface, which is widely used for data transmission and power supply, for example. There may be multiple Type-C interfaces on an electronic device. For cost considerations, the functions of these Type-C interfaces are not the same. This inevitably leads to the risk that users will insert the Type-C plug that is supposed to power the machine into the USB3.0 Type-C interface, so electrical damage problems caused by user mis-insertion often occur.
[0003] Existing anti-misinsertion solutions mainly focus on physical shape markings, color markings, etc., but there are some shortcomings in practical applications. Even if current protectors (current limiting ICs) and voltage protectors (TVS, Zener) and other protection devices are added during interface design, these protection devices will not only increase costs, but also cause voltage instability when the USB3.0 interface is powered due to sudden load changes, which in turn affects the normal operation of the device. Utility Model Content
[0004] The main purpose of the embodiments of the present application is to provide an anti-misinsertion protection module, an interface power supply circuit and an electronic device, aiming to solve the technical problem of how to achieve interface anti-misinsertion protection at low cost while ensuring the stability of the interface function.
[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides an anti-misinsertion protection module, which is arranged in an interface power supply circuit, and the anti-misinsertion protection module includes:
[0006] A parallel diode, wherein the anode of the parallel diode is connected to the current limiting output end of the current limiting switch in the interface power supply circuit, and the cathode of the parallel diode is connected to the power supply output end of the interface power supply circuit. The parallel diode is used to reduce the forward voltage drop to prevent voltage fluctuations caused by sudden changes in the load connected to the interface power supply circuit.
[0007] Optionally, the parallel diode is composed of at least two diodes connected in parallel, the anodes of the at least two diodes are connected in common as the anode of the parallel diode, and the cathodes of the at least two diodes are connected in common as the cathode of the parallel diode.
[0008] Optionally, the diode is a Schottky diode.
[0009] Optionally, the anti-misinsertion protection module further includes:
[0010] A load resistor, one end of which is connected to the cathode of the parallel diode, and the other end of which is grounded.
[0011] Optionally, the anti-misinsertion protection module further includes:
[0012] A filter capacitor, one end of which is connected to the cathode of the parallel diode, and the other end of which is grounded.
[0013] In addition, to achieve the above-mentioned purpose, an embodiment of the present application also provides an interface power supply circuit, which includes a power supply input terminal, a current limiting switch, an anti-misinsertion protection module as described above, and a power supply output terminal connected in sequence.
[0014] Optionally, the current limiting switch includes a current limiting input terminal, a current limiting enable terminal, a current limiting output terminal, a current limiting setting terminal and a ground terminal; wherein the current limiting input terminal is connected to the power supply input terminal, the current limiting output terminal is connected to one end of the anti-misinsertion protection module, and the ground terminal is grounded.
[0015] Optionally, the interface power supply circuit further includes:
[0016] A first capacitor, one end of the first capacitor is grounded, and the other end of the first capacitor is connected to the current limiting input end;
[0017] A voltage divider module, wherein a first end of the voltage divider module is connected to an enable signal, a second end of the voltage divider module is grounded, and a third end of the voltage divider module is connected to the current limiting enable end;
[0018] A first resistor, one end of the first resistor is connected to the current limiting setting end, and the other end of the first resistor is grounded;
[0019] A second capacitor, a third capacitor and a voltage-stabilizing diode, one end of the second capacitor, one end of the third capacitor and a cathode of the voltage-stabilizing diode are connected to the current-limiting output end, and the other end of the second capacitor, the other end of the third capacitor and an anode of the voltage-stabilizing diode are grounded;
[0020] A fourth capacitor and a fifth capacitor, one end of the fourth capacitor and one end of the fifth capacitor are connected to the power supply output end, and the other end of the fourth capacitor and the other end of the fifth capacitor are grounded.
[0021] Optionally, the voltage division module includes:
[0022] a second resistor, one end of which is connected to the enable signal, and the other end of which is grounded;
[0023] A third resistor, one end of the third resistor is connected to the enable signal, and the other end of the third resistor is connected to the current limiting enable end.
[0024] In addition, to achieve the above-mentioned purpose, an embodiment of the present application further provides an electronic device, which includes the interface power supply circuit as described above.
[0025] The embodiment of the present application proposes an anti-misinsertion protection module, an interface power supply circuit and an electronic device, which overcomes the problem that the interface anti-misinsertion scheme in the related art is unstable and costly. The anti-misinsertion protection module is arranged in the interface power supply circuit, and includes: a parallel diode, the anode of the parallel diode is connected to the current limiting output end of the current limiting switch in the interface power supply circuit, the cathode of the parallel diode is connected to the power supply output end of the interface power supply circuit, and the parallel diode is used to reduce the forward voltage drop to prevent voltage fluctuations caused by sudden changes in the load connected to the interface power supply circuit. The anti-misinsertion protection module provided in the embodiment of the present application only needs to add simple electrical components to the interface power supply circuit to stabilize the voltage at the power supply output end of the interface power supply circuit, and prevent voltage fluctuations caused by sudden changes in the load connected to the interface power supply circuit. While ensuring the stability of the interface function, the interface anti-misinsertion protection is achieved at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0027] Figure 1 A schematic diagram of the structure of an anti-misinsertion protection module provided in an embodiment of the present application;
[0028] Figure 2 A schematic diagram of the structure of another anti-misinsertion protection module provided in an embodiment of the present application;
[0029] Figure 3 A structural schematic diagram of another anti-misinsertion protection module provided in an embodiment of the present application;
[0030] Figure 4 A schematic diagram of the structure of an interface power supply circuit provided in an embodiment of the present application;
[0031] Figure 5 A schematic diagram of the structure of a current limiting switch in an interface power supply circuit provided in an embodiment of the present application;
[0032] Figure 6A schematic diagram of the structure of another interface power supply circuit provided in an embodiment of the present application;
[0033] Figure 7 A schematic diagram of the structure of a voltage divider module in an interface power supply circuit provided in an embodiment of the present application;
[0034] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
[0035] The realization of the purpose, functional features and advantages of the embodiments of the present application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0036] Description of Figure Numbers:
[0037] Label name Label name 100 Anti-misinsertion protection module 200 Interface power supply circuit D1 / / D2 Parallel diode OCP Current Limiting Switch VOUT Power supply output R Load resistance C Filter capacitor VIN Power input IN Current limiting input EN Current limit enable terminal OUT Current limiting output SET Current limit setting terminal GND Ground terminal / ground C1~C5 The first capacitor to the fifth capacitor 201 Voltage divider module R1~R3 First resistor to third resistor D3 Zener diode 300 Electronic devices DETAILED DESCRIPTION
[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.
[0039] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0040] In addition, in the embodiments of the present application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the meaning of "and / or" appearing in the full text is to include three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B.
[0041] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0042] It should also be understood that the references to "one embodiment" or "some embodiments" described in the specification of the embodiments of the present application mean that one or more embodiments of the embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0043] With the development of economy and the advancement of science and technology, users have more and more demands for consumer electronics, which has also made the interfaces of most consumer electronics become diverse. Among them, Type-C interface has also become the most commonly used interface type by users. The common Type-C interface of consumer electronics on the market is widely used for data transmission and power supply functions, so there may be multiple Type-C interfaces on a machine. For cost considerations, different Type-C interfaces often have different functions. This inevitably leads to the risk that users will plug the Type-C plug that is supposed to power the machine into the USB3.0 Type-C interface, and electrical damage problems caused by user mis-plugging often occur.
[0044] Existing anti-misinsertion solutions mainly focus on physical shape markings, color markings, etc., but there are some shortcomings in practical applications. Even if current protectors (current limiting ICs) and voltage protectors (TVS, Zener) and other protection devices are added during interface design, these protection devices will not only increase costs, but also cause voltage instability when the USB3.0 interface is powered due to sudden load changes, which in turn affects the normal operation of the device.
[0045] Based on this, the embodiment of the present application provides an anti-misinsertion protection module, an interface power supply circuit and an electronic device, which overcomes the problem of instability and high cost of the interface anti-misinsertion scheme in the related art. The embodiment of the present application only needs to add simple electrical components to the interface power supply circuit, and the anti-misinsertion protection module can be set in the interface power supply circuit, so that the voltage at the power supply output end of the interface power supply circuit can be stabilized, and the voltage fluctuation caused by the sudden change of the load connected to the interface power supply circuit can be prevented. Under the condition of ensuring the stability of the interface function, the interface anti-misinsertion protection is realized at a low cost.
[0046] The anti-misinsertion protection module, interface power supply circuit and electronic device provided in the embodiments of the present application are specifically described through the following embodiments. First, the anti-misinsertion protection module in the embodiments of the present application is described.
[0047] The present application embodiment provides an anti-misinsertion protection module, referring to Figure 1 , Figure 1 The structure diagram of an anti-misinsertion protection module provided in an embodiment of the present application is as follows. The anti-misinsertion protection module 100 is arranged in an interface power supply circuit 200. The anti-misinsertion protection module 100 includes:
[0048] A parallel diode D1 / / D2, wherein the anode of the parallel diode D1 / / D2 is connected to the current limiting output terminal OUT of the current limiting switch OCP in the interface power supply circuit 200, and the cathode of the parallel diode D1 / / D2 is connected to the power supply output terminal VOUT of the interface power supply circuit 200. The parallel diode D1 / / D2 is used to reduce the forward voltage drop to prevent voltage fluctuations caused by sudden load changes connected to the interface power supply circuit 200.
[0049] In this embodiment, by adding parallel diodes D1 / / D2 at the rear end of the current limiting switch OCP in the interface power supply circuit 200, damage to the interface caused by mis-insertion can be prevented. The parallel diodes can reduce the equivalent resistance and further reduce the voltage drop. In the case of parallel connection, the current can be shunted through each diode, so the current on each diode is relatively reduced. Since there is a physical relationship between the voltage drop and current of the diode, that is, V=I*Rd, where V is the voltage drop of the diode, I is the current, and Rd is the dynamic resistance of the diode. It can be seen from the above formula that when the current decreases, the voltage drop of the diode will also decrease. Therefore, connecting the diodes in parallel will cause the overall current to be shared among the diodes, and the current on each diode is smaller, thereby reducing the voltage drop effect of the diode.
[0050] In some feasible embodiments, the parallel diode D1 / / D2 is composed of at least two diodes connected in parallel, the anodes of the at least two diodes are connected in common as the anode of the parallel diode D1 / / D2, and the cathodes of the at least two diodes are connected in common as the cathode of the parallel diode D1 / / D2.
[0051] It is understandable that the parallel diodes D1 / / D2 provided in this embodiment are only two diodes connected in parallel as an example. According to actual needs, more diodes may be connected in parallel to further improve the anti-misinsertion effect and circuit stability.
[0052] As an example, the diode is a Schottky diode.
[0053] In this embodiment, the Schottky diode is selected because of its low forward voltage drop characteristic. In practical applications, different types of diodes can also be selected according to specific requirements to meet the needs of specific application scenarios. For example, ordinary diodes can be replaced to increase power capacity or reduce reverse leakage current, and this embodiment does not limit this.
[0054] Reference Figure 2 In some feasible embodiments, the anti-misinsertion protection module 100 further includes:
[0055] A load resistor R, one end of the load resistor R is connected to the cathode of the parallel diode D1 / / D2, and the other end of the load resistor R is grounded.
[0056] In this embodiment, the load resistor R is used to ensure that the parallel diodes D1 / / D2 are turned on to maintain a basic voltage drop.
[0057] Reference Figure 3 In some feasible embodiments, the anti-misinsertion protection module 100 further includes:
[0058] A filter capacitor C, one end of the filter capacitor C is connected to the cathode of the parallel diode D1 / / D2, and the other end of the filter capacitor C is grounded.
[0059] In this embodiment, the filter capacitor C is used to make the output smooth and pure, thereby reducing the occurrence of ripples.
[0060] In addition, it should be understood that, in some feasible embodiments, the anti-misinsertion protection module 100 may include parallel diodes D1 / / D2, a load resistor R and a filter capacitor C at the same time.
[0061] In the present embodiment, an anti-misinsertion protection module 100 is proposed, which mainly utilizes the electronic characteristic of the diode that is unidirectionally conducted to improve the commonly used interface power supply circuit 200, and is matched with other resistors and capacitors to further stabilize the interface function. The anti-misinsertion protection module 100 provided in the present embodiment has many advantages such as high performance stability, low cost, and small PCB (Printed Circuit Board) modification while ensuring the anti-misinsertion protection function.
[0062] In addition, the embodiment of the present application also provides an interface power supply circuit 200, referring to Figure 4 , Figure 4 A structural schematic diagram of an interface power supply circuit 200 provided in an embodiment of the present application, wherein the interface power supply circuit 200 includes a power supply input terminal VIN, a current limiting switch OCP, an anti-misinsertion protection module 100 in any of the above embodiments, and a power supply output terminal VOUT connected in sequence.
[0063] In this embodiment, the power supply input terminal VIN and the power supply output terminal VOUT of the interface power supply circuit 200 are used to connect to the load, and by adding an anti-misinsertion protection module 100 in any of the above embodiments between the current limiting switch OCP and the power supply output terminal VOUT, the interface power supply circuit 200 can have the function of anti-misinsertion protection without consuming too much cost.
[0064] Reference Figure 5 In some feasible embodiments, the current limiting switch OCP includes a current limiting input terminal IN, a current limiting enable terminal EN, a current limiting output terminal OUT, a current limiting setting terminal SET and a ground terminal GND; wherein the current limiting input terminal IN is connected to the power supply input terminal VIN, the current limiting output terminal OUT is connected to one end of the anti-misinsertion protection module 100, and the ground terminal GND is grounded.
[0065] It is understandable that the current limiting switch OCP, namely Over Current Protection, is a device for current overload protection. When it enters the setting state, the relay in the protector will automatically release, and the protector will exit the protection state, effectively preventing misoperation in the setting state.
[0066] Reference Figure 6 In some feasible embodiments, the interface power supply circuit 200 further includes:
[0067] A first capacitor C1, one end of the first capacitor C1 is grounded, and the other end of the first capacitor C1 is connected to the current limiting input terminal IN;
[0068] A voltage divider module 201, wherein a first terminal of the voltage divider module 201 is connected to an enable signal POWER EN, a second terminal of the voltage divider module 201 is grounded, and a third terminal of the voltage divider module 201 is connected to the current limiting enable terminal EN;
[0069] A first resistor R1, one end of the first resistor R1 is connected to the current limiting setting end SET, and the other end of the first resistor R1 is grounded;
[0070] A second capacitor C2, a third capacitor C3 and a voltage-stabilizing diode D3, one end of the second capacitor C2, one end of the third capacitor C3 and a cathode of the voltage-stabilizing diode D3 are connected to the current-limiting output terminal OUT, and the other end of the second capacitor C2, the other end of the third capacitor C3 and an anode of the voltage-stabilizing diode D3 are grounded;
[0071] A fourth capacitor C4 and a fifth capacitor C5, one end of the fourth capacitor C4 and one end of the fifth capacitor C5 are connected to the power supply output terminal VOUT, and the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 are grounded.
[0072] Reference Figure 7 In some feasible embodiments, the voltage dividing module 201 includes:
[0073] A second resistor R2, one end of the second resistor R2 is connected to the enable signal, and the other end of the second resistor R2 is grounded;
[0074] A third resistor R3, one end of the third resistor R3 is connected to the enable signal, and the other end of the third resistor R3 is connected to the current limiting enable end EN.
[0075] The interface power supply circuit proposed in this embodiment and the anti-misinsertion protection module proposed in the above embodiment belong to the same technical concept. The technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the above embodiments of the anti-misinsertion protection module.
[0076] In addition, the present application also provides an electronic device, referring to Figure 8 The electronic device 300 includes the interface power supply circuit 200 provided in the above embodiment.
[0077] As an example, the electronic device 300 may be a terminal device with an external interface, such as a computer, a mobile phone, a display, or a server.
[0078] Those skilled in the art will understand that Figure 8 The structure shown in the figure does not constitute a limitation on the electronic device 300, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.
[0079] The electronic device proposed in this embodiment and the interface power supply circuit proposed in the above embodiments belong to the same technical concept. The technical details not fully described in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the above embodiments of the interface power supply circuit.
[0080] It should be noted that the technical solutions of the various embodiments of the embodiments of the present application can be combined with each other, but it must be based on the fact that they can be implemented by technical personnel in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present application.
[0081] The above are only optional embodiments of the embodiments of the present application, and do not limit the patent scope of the embodiments of the present application. Any equivalent structure or equivalent process transformation made using the description and drawings of the embodiments of the present application, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the embodiments of the present application.
Claims
1. An anti-misinsertion protection module, characterized in that: The anti-misinsertion protection module is arranged in the interface power supply circuit, and the anti-misinsertion protection module comprises: A parallel diode, wherein the anode of the parallel diode is connected to the current limiting output end of the current limiting switch in the interface power supply circuit, and the cathode of the parallel diode is connected to the power supply output end of the interface power supply circuit. The parallel diode is used to reduce the forward voltage drop to prevent voltage fluctuations caused by sudden changes in the load connected to the interface power supply circuit.
2. The anti-misinsertion protection module according to claim 1, characterized in that: The parallel diode is composed of at least two diodes connected in parallel, the anodes of the at least two diodes are connected in common as the anode of the parallel diode, and the cathodes of the at least two diodes are connected in common as the cathode of the parallel diode.
3. The anti-misinsertion protection module according to claim 2, characterized in that: The diode is a Schottky diode.
4. The anti-misinsertion protection module according to claim 1, characterized in that: The anti-misinsertion protection module also includes: A load resistor, one end of which is connected to the cathode of the parallel diode, and the other end of which is grounded.
5. The anti-misinsertion protection module according to claim 1, characterized in that: The anti-misinsertion protection module also includes: A filter capacitor, one end of which is connected to the cathode of the parallel diode, and the other end of which is grounded.
6. An interface power supply circuit, characterized in that: The interface power supply circuit comprises a power supply input terminal, a current limiting switch, an anti-misinsertion protection module according to any one of claims 1 to 5, and a power supply output terminal which are connected in sequence.
7. The interface power supply circuit according to claim 6, characterized in that: The current limiting switch includes a current limiting input terminal, a current limiting enable terminal, a current limiting output terminal, a current limiting setting terminal and a ground terminal; wherein the current limiting input terminal is connected to the power supply input terminal, the current limiting output terminal is connected to one end of the anti-misinsertion protection module, and the ground terminal is grounded.
8. The interface power supply circuit according to claim 7, characterized in that: The interface power supply circuit also includes: A first capacitor, one end of the first capacitor is grounded, and the other end of the first capacitor is connected to the current limiting input end; A voltage divider module, wherein a first end of the voltage divider module is connected to an enable signal, a second end of the voltage divider module is grounded, and a third end of the voltage divider module is connected to the current limiting enable end; A first resistor, one end of the first resistor is connected to the current limiting setting end, and the other end of the first resistor is grounded; A second capacitor, a third capacitor and a voltage-stabilizing diode, one end of the second capacitor, one end of the third capacitor and a cathode of the voltage-stabilizing diode are connected to the current-limiting output end, and the other end of the second capacitor, the other end of the third capacitor and an anode of the voltage-stabilizing diode are grounded; A fourth capacitor and a fifth capacitor, one end of the fourth capacitor and one end of the fifth capacitor are connected to the power supply output end, and the other end of the fourth capacitor and the other end of the fifth capacitor are grounded.
9. The interface power supply circuit according to claim 8, characterized in that: The voltage divider module comprises: a second resistor, one end of which is connected to the enable signal, and the other end of which is grounded; A third resistor, one end of the third resistor is connected to the enable signal, and the other end of the third resistor is connected to the current limiting enable end.
10. An electronic device, characterized in that: The electronic device comprises the interface power supply circuit according to any one of claims 6 to 9.