Single isolation trigger circuit

Abstract

The utility model belongs to the technical field of isolation trigger circuits, and particularly discloses a single isolation trigger circuit which comprises an isolation signal input end, an isolation signal output end and a tube Q1, the isolation signal input end is connected with a pin 1 of the tube Q1, a pin 2 of the tube Q1 is grounded, a pin 3 of the tube Q1 is connected with one end of a left coil of a transformer L1, and the other end of the left coil of the transformer L1 is grounded. The other end of the left coil of the transformer L1 is externally connected with 5V voltage; one end of a right coil of the transformer L1 is grounded, and the other end of the right coil of the transformer L1 is connected with an isolation signal output end. According to the scheme, the isolation signal can be transmitted, and the wake-up port can be released in time. A wake-up signal isolation function is realized, and a wake-up signal at a high-voltage side can be directly sent to a low-voltage side; the function of an imported chip is achieved through the combination of domestic devices; the circuit is simplified; the circuit maintainability is improved; and after being awakened, the awakening port can be released in time without influencing the input of other awakening sources.

Description

Technical Field

[0001] This utility model relates to the field of isolation trigger circuit technology, specifically a single-time isolation trigger circuit. Background Technology

[0002] The high-voltage platform for new energy vehicles refers to the high-voltage electrical system used in new energy vehicles. This platform covers key components such as batteries, motors, and electronic control systems, providing the necessary electrical energy for vehicle power and operation.

[0003] As existing high-voltage platforms for new energy vehicles become increasingly sophisticated, signal transmission between high and low voltage levels requires isolation. However, some wake-up signal circuits lack isolation capabilities, causing the wake-up signal to occupy the wake-up port for extended periods without automatically releasing it, resulting in the circuit failing to recognize other wake-up sources. Utility Model Content

[0004] The purpose of this invention is to provide a single-time isolation trigger circuit to solve the problem mentioned in the background art that some wake-up signal circuits do not have isolation functions, resulting in the circuit being unable to identify other wake-up sources.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-time isolation trigger circuit, comprising:

[0006] Isolation signal input terminal, isolation signal output terminal, and transistor Q1;

[0007] The isolation signal input terminal is connected to pin 1 of tube Q1, pin 2 of tube Q1 is grounded, pin 3 of tube Q1 is connected to one end of the left coil of transformer L1, and the other end of the left coil of transformer L1 is connected to an external 5V voltage.

[0008] One end of the right coil of transformer L1 is grounded, and the other end of the right coil of transformer L1 is connected to the isolation signal output terminal.

[0009] Preferably, a resistor R1 is connected between the left coil of the transformer L1 and the 5V voltage terminal, and the resistance of the resistor R1 is 2KΩ.

[0010] Preferably, a resistor R3 is connected between the left coil of the transformer L1 and pin 3 of the tube Q1, and the resistance of the resistor R3 is 2KΩ.

[0011] Preferably, a resistor R2 is connected between the right coil of the transformer L1 and the isolation signal output terminal, and the resistance of the resistor R2 is 2KΩ.

[0012] Preferably, a resistor R4 is connected in series on the right coil of the transformer L1, and the resistance of the resistor R4 is 2KΩ.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This circuit, composed of discrete components such as resistors, N-type MOSFETs (Q1), and transformers, is capable of transmitting isolated signals and promptly releasing the wake-up port. It achieves wake-up signal isolation, allowing the high-voltage side wake-up signal to be directly supplied to the low-voltage side; it achieves the functionality of imported chips using domestically produced components; it simplifies the circuit; it increases circuit maintainability; and after being woken up, the wake-up port releases promptly without affecting other wake-up source inputs. Attached Figure Description

[0015] Figure 1 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Example 1:

[0019] Please see Figure 1 This utility model provides a technical solution: a single-time isolation trigger circuit, comprising: an isolation signal input terminal, an isolation signal output terminal, and a transistor Q1;

[0020] The isolation signal input terminal is connected to pin 1 of transistor Q1, pin 2 of transistor Q1 is grounded, pin 3 of transistor Q1 is connected to one end of the left coil of transformer L1, and the other end of the left coil of transformer L1 is connected to a 5V voltage. One end of the right coil of transformer L1 is grounded, and the other end of the right coil of transformer L1 is connected to the isolation signal output terminal. A resistor R1 with a resistance of 2KΩ is connected between the left coil of transformer L1 and the 5V voltage terminal. A resistor R3 with a resistance of 2KΩ is connected between the left coil of transformer L1 and pin 3 of transistor Q1. A resistor R2 with a resistance of 2KΩ is connected between the right coil of transformer L1 and the isolation signal output terminal. A resistor R4 with a resistance of 2KΩ is connected in series with the right coil of transformer L1.

[0021] Analysis of the above content: such as Figure 1 As shown, it includes a side A and a side B. The side A includes an isolation signal input terminal, tube Q1, resistor R3, resistor R1, and the left coil of transformer L1. The side B includes the right coil of transformer L1, resistor R2, resistor R4, and an isolation signal output terminal.

[0022] 1: Side A and side B are two parts that require electrical isolation. Transformer L1 provides the isolation function.

[0023] 2: The isolation signal input terminal is a wake-up signal. When the wake-up signal is input, transistor Q1 is turned on. When transistor Q1 is turned on, the 5V voltage terminal provides 5V voltage, which forms a circuit through resistor R1, the left coil of transformer L1, resistor R3, transistor Q1 to GND. The current of the left coil of transformer L1 changes, thereby generating an induced electromotive force in the right coil of transformer L1.

[0024] 3: When the current in the right coil of transformer L1 generates an induced electromotive force, the isolation signal output will output a high level.

[0025] Transistor Q1 acts as a switch, controlling the on / off state of the circuit. Resistor R3 is a current-limiting resistor for transistor Q1, protecting it.

[0026] Resistors (R1, R2, R3, R4): Resistors R1 and R3 are used to limit the current and protect transistor Q1 and other parts of the circuit; resistor R2 limits the current of the output signal; resistor R4 provides a reference ground for the B-side circuit and stabilizes the circuit operation.

[0027] 4. Because transformer L1 requires a continuous change in current on one side to generate an induced electromotive force on the other side, once the left-side transistor Q1 is closed and the current in the left coil of transformer L1 stabilizes, the right coil of transformer L1 can no longer maintain an electromotive force. At this point, the wake-up port of the chip used for wake-up is released, without affecting the wake-up actions of other wake-up sources. (The use case where the wake-up port needs to be released is when multiple wake-up sources are connected to the same wake-up port).

[0028] This circuit, composed of discrete components such as resistors, N-type MOSFETs (Q1), and transformers, is capable of transmitting isolated signals and promptly releasing the wake-up port. It achieves wake-up signal isolation, allowing the high-voltage side wake-up signal to be directly supplied to the low-voltage side; it achieves the functionality of imported chips using domestically produced components; it simplifies the circuit; it increases circuit maintainability; and after being woken up, the wake-up port releases promptly without affecting other wake-up source inputs.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-shot isolation trigger circuit, characterized by, The utility model relates to an isolation signal input end, isolation signal output end and tube Q1 are included to the utility model discloses a kind of isolation signal output circuit. Wherein, the isolation signal input end is connected with the pin 1 of tube Q1, the pin two of the tube Q1 is grounded, the pin 3 of the tube Q1 is connected with the left side coil one end of transformer L1, the left side coil other end of the transformer L1 is externally connected with 5V voltage. The right side coil one end of the transformer L1 is grounded, and the right side coil other end of the transformer L1 is connected with the isolation signal output end. The resistance R1 is connected between the left side coil of the transformer L1 and the 5V voltage end, and the resistance R1 has a resistance value of 2KΩ.

2. A one-shot isolation trigger circuit according to claim 1, characterized in that: The resistance R3 is connected between the left side coil of the transformer L1 and the pin 3 of tube Q1, and the resistance R3 has a resistance value of 2KΩ.

3. A one-shot isolation trigger circuit according to claim 1, wherein: The resistance R2 is connected between the right side coil of the transformer L1 and the isolation signal output end, and the resistance R2 has a resistance value of 2KΩ.

4. A one-shot isolation trigger circuit according to claim 1, wherein: The resistance R4 is connected in series on the right side coil of the transformer L1, and the resistance R4 has a resistance value of 2KΩ.

5. A one-shot isolation trigger circuit according to claim 1, wherein: ​

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