Electronic cigarette control circuit with cigarette cartridge encryption function

Abstract

The utility model provides an electronic cigarette control circuit with a cartridge encryption function, which is characterized in that the input end of a voltage-stabilizing power supply circuit is connected with a power supply, and the output end of the voltage-stabilizing power supply circuit is in power supply connection with an electronic cigarette main body main control circuit and a tobacco tar atomization control circuit; the output end of the electronic cigarette body main control circuit is connected with the input end of the encryption communication circuit, the input end of the tobacco tar atomization control circuit and the input end of the nixie tube display circuit, the encryption communication circuit is in communication connection with the smoke cartridge atomizer circuit, and the output end of the tobacco tar atomization control circuit is connected with the input end of the smoke cartridge atomizer circuit. The input end of the electronic cigarette body main control circuit is further connected with the output end of the microphone switch control circuit, and the output end of the nixie tube display circuit is connected with a digital display tube. The electronic cigarette has the advantages that encryption matching of the electronic cigarette body and the smoke cartridge can be achieved, and only when the smoke cartridge meeting encryption matching is connected, the electronic cigarette body can supply power to the smoke cartridge atomizer to work.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and in particular to an electronic cigarette control circuit with a cigarette cartridge encryption function. Background Art

[0002] E-cigarettes are electronic products that mimic cigarettes, offering the same appearance, smoke, taste, and feel as regular cigarettes, even with a wider variety of flavors. They transform nicotine and other substances into vapor through atomization, which is then inhaled by the user. Typically, an e-cigarette consists of a pipe containing a nicotine solution, an evaporator, and a battery. The battery-powered atomizer converts the liquid nicotine in the cartridge into mist, giving the user a similar smoking sensation.

[0003] E-cigarettes currently on the market generally consist of a cartridge and the main body of the e-cigarette. The cartridge generally consists of a non-detachable oil tank and an atomizer. The oil in the tank is atomized by the atomizer for the user to inhale. There are currently two main types of atomization methods: one is heating atomization, which mainly uses a heating wire and heating mesh to heat the oil in the tank and atomize it for inhalation; the other is ultrasonic atomization. The cartridge generally consists of a non-detachable oil tank and atomizer, and the oil is atomized by ultrasonic waves for inhalation. However, regardless of the atomization method, the atomizer in the cartridge requires power to operate, and the main body of the e-cigarette must have a main control circuit board and power supply.

[0004] In the prior art, the electronic cigarette body and the cigarette cartridge are detachable. When a cigarette cartridge is used up, it can be removed and replaced with a new one. An electronic cigarette body can often be adapted to multiple cigarette cartridges, making it easy to replace cigarette cartridges with different flavors. However, there is a problem. If the electronic cigarette body uses a non-standard cigarette cartridge, a cigarette cartridge without any "three-no" label, or a cigarette cartridge that is incompatible with the electronic cigarette body model, it may lead to insufficient atomization, easy damage to the atomizer, and even cause a fire inside the electronic cigarette body. This not only compromises safety but also provides a poor user experience. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides an electronic cigarette control circuit with a cigarette cartridge encryption function. By arranging mutually coordinated voltage-stabilized power supply circuit, electronic cigarette main body main control circuit, encryption communication circuit, smoke oil atomization control circuit, cigarette cartridge atomizer circuit, microphone switch control circuit and digital tube display circuit in the electronic cigarette control circuit with the cigarette cartridge encryption function, encryption matching of the electronic cigarette main body and the cigarette cartridge can be achieved. The circuit structure is simple, which greatly improves the safety of the electronic cigarette and the user experience, and solves the problems in the prior art that the unlimited combination of electronic cigarettes and cigarette cartridges will lead to insufficient atomization, easy damage of the atomizer and poor safety.

[0006] The utility model provides an electronic cigarette control circuit with a cigarette cartridge encryption function, comprising a voltage-stabilized power supply circuit, an electronic cigarette main body main control circuit, an encryption communication circuit, a smoke oil atomization control circuit, a cigarette cartridge atomizer circuit, a microphone switch control circuit and a digital tube display circuit. The input end of the voltage-stabilized power supply circuit is connected to a power supply, the output end of the voltage-stabilized power supply circuit is connected to the electronic cigarette main body main control circuit and the smoke oil atomization control circuit for power supply, the output end of the electronic cigarette main control circuit is connected to the input end of the encryption communication circuit, the input end of the smoke oil atomization control circuit, The input end of the digital tube display circuit is connected, the encrypted communication circuit is in communication connection with the cigarette cartridge atomizer circuit, the output end of the smoke oil atomization control circuit is connected to the input end of the cigarette cartridge atomizer circuit, the input end of the electronic cigarette main control circuit is also connected to the output end of the microphone switch control circuit, the output end of the digital tube display circuit is connected to a digital display tube, and the electronic cigarette main control circuit can control the on and off of the smoke oil atomization control circuit and the cigarette cartridge atomizer circuit according to the cigarette cartridge information in the cigarette cartridge atomizer circuit fed back by the encrypted communication circuit.

[0007] The present utility model is further improved. A main control chip U2 and a resistor R17 are provided in the main control circuit of the electronic cigarette body. The main control chip U2 is provided with 25 pins. Pin 1 of the main control chip U2 is connected to the output end of the voltage-stabilized power supply circuit through the resistor R17. Pins 4, 6, and 23 of the main control chip U2 are connected to the input end of the encryption communication circuit. Pins 5 and 21 of the main control chip U2 are connected to the input end of the smoke oil atomization control circuit. Pins 9, 7, 8, 10, 12, 14, 13, and 15 of the main control chip U2 are connected to the input end of the digital tube display circuit. Pin 2 of the main control chip U2 is connected to the output end of the microphone switch control circuit.

[0008] The present utility model is further improved. A voltage regulator chip U1 is provided in the voltage-regulated power supply circuit. The voltage regulator chip U1 has 5 pins. The 4th pin of the voltage regulator chip U1 is connected to the power supply. The 3rd pin of the voltage regulator chip U1 is connected to the 1st pin of the main control chip U2 and the power supply of the e-liquid atomization control circuit. The 2nd pin of the voltage regulator chip U1 is grounded.

[0009] The present utility model is further improved. The encrypted communication circuit is provided with a field effect transistor Q6, a resistor R4, a resistor R25 and a resistor R27. The gate of the field effect transistor Q6 is connected to one end of the resistor R25 and the fourth pin of the main control chip U2. The drain of the field effect transistor Q6 is connected to one end of the resistor R4, one end of the resistor R27 and the cigarette cartridge atomizer circuit. The other end of the resistor R4 is connected to the sixth pin of the main control chip U2. The other end of the resistor R27 is connected to the 23rd pin of the main control chip U2. The source of the field effect transistor Q6 and the other end of the resistor R25 are grounded.

[0010] The present utility model is further improved. The cigarette cartridge atomizer circuit is provided with an atomizer chip U3 and a field effect transistor Q7. The atomizer chip U3 is provided with 6 pins. The first pin of the atomizer chip U3 is connected to the source of the field effect transistor Q7 and the drain of the field effect transistor Q6. The gate of the field effect transistor Q7 is connected to the output end of the cigarette oil atomization control circuit. The second pin of the atomizer chip U3 and the drain of the field effect transistor Q7 are grounded.

[0011] The utility model is further improved. A field effect transistor Q5 and a resistor R2 are provided in the e-liquid atomization control circuit. The gate of the field effect transistor Q5 is connected to the 21st pin of the main control chip U2, the source of the field effect transistor Q5 is connected to the 3rd pin of the voltage regulator chip U1, the drain of the field effect transistor Q5 is connected to one end of the resistor R2 and the gate of the field effect transistor Q7, and the other end of the resistor R2 is connected to the 5th pin of the main control chip U2.

[0012] The present utility model is further improved. The microphone switch control circuit is provided with a microphone switch M1 and a resistor R18. The microphone switch M1 is provided with 3 pins. The first pin of the microphone switch M1 is connected to the third pin of the voltage regulator chip U1 through the resistor R18. The third pin of the microphone switch M1 is connected to the second pin of the main control chip U2.

[0013] The present utility model is further improved. The digital tube display circuit is provided with a display interface J1. The output end of the display interface J1 is connected to the digital display tube. The input end of the display interface J1 is provided with 12 pins. The 1st, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th pins of the display interface J1 are respectively connected to the 9th, 7th, 8th, 10th, 12th, 14th, 13th and 15th pins of the main control chip U2.

[0014] The present invention is further improved, and the model of the main control chip U2 is PY32C616.

[0015] The present invention is further improved in that the model of the atomizer chip U3 is RJGT105, and the model of the voltage regulator chip U1 is LP4068.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: providing an electronic cigarette control circuit with a cartridge encryption function, by arranging mutually cooperating voltage-stabilized power supply circuit, electronic cigarette main body main control circuit, encryption communication circuit, smoke oil atomization control circuit, smoke cartridge atomizer circuit, microphone switch control circuit and digital tube display circuit in the electronic cigarette control circuit with the cartridge encryption function, the electronic cigarette main body main control circuit can control the on and off of the smoke oil atomization control circuit and the smoke cartridge atomizer circuit according to the smoke cartridge information in the smoke cartridge atomizer circuit fed back by the encryption communication circuit, and can realize encryption matching between the electronic cigarette main body and the smoke cartridge. Only when the smoke cartridge that meets the encryption matching is connected, the electronic cigarette main body will supply power to the smoke cartridge atomizer. The circuit structure is simple, which greatly improves the safety of the electronic cigarette and the user experience, and solves the problems in the prior art of insufficient atomization, easy damage to the atomizer and poor safety caused by the unlimited combination of electronic cigarettes and smoke cartridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a principle block diagram of an electronic cigarette control circuit with a cartridge encryption function according to the present utility model;

[0019] Figure 2 This is a circuit diagram of the main control circuit of the electronic cigarette body of the present utility model;

[0020] Figure 3 This is a circuit diagram of the voltage-stabilized power supply circuit of the present utility model;

[0021] Figure 4A circuit diagram of the encryption communication circuit of the present utility model;

[0022] Figure 5 This is a circuit diagram of the cigarette cartridge atomizer circuit of the present utility model;

[0023] Figure 6 This is a circuit diagram of the smoke oil atomization control circuit of the present utility model;

[0024] Figure 7 This is a circuit diagram of the microphone switch control circuit of the present utility model;

[0025] Figure 8 The following is a circuit diagram of a digital tube display circuit of the present utility model. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] like Figures 1-8As shown, the utility model provides an electronic cigarette control circuit with a cartridge encryption function, including a voltage-stabilized power supply circuit, an electronic cigarette main control circuit, an encryption communication circuit, a smoke oil atomization control circuit, a smoke cartridge atomizer circuit, a microphone switch control circuit and a digital tube display circuit. The input end of the voltage-stabilized power supply circuit is connected to a power supply, and the output end of the voltage-stabilized power supply circuit is connected to the electronic cigarette main control circuit and the smoke oil atomization control circuit for power supply. The output end of the electronic cigarette main control circuit is connected to the input end of the encryption communication circuit, the input end of the smoke oil atomization control circuit, and the input end of the digital tube display circuit. The encryption communication circuit is communicatively connected to the smoke cartridge atomizer circuit, the output end of the smoke oil atomization control circuit is connected to the input end of the smoke cartridge atomizer circuit, the input end of the electronic cigarette main control circuit is also connected to the output end of the microphone switch control circuit, and the output end of the digital tube display circuit is connected to a digital display tube. In this embodiment, the main control circuit of the electronic cigarette body can control the on and off of the smoke oil atomization control circuit and the smoke cartridge atomizer circuit according to the smoke cartridge information in the smoke cartridge atomizer circuit fed back by the encrypted communication circuit, and can realize the encrypted matching of the electronic cigarette body and the smoke cartridge. Only when the smoke cartridge that meets the encryption matching is connected, the electronic cigarette body will supply power to the smoke cartridge atomizer. The circuit structure is simple, which greatly improves the safety of the electronic cigarette and the user experience.

[0030] like Figure 2 As shown, the main control circuit of the electronic cigarette body is equipped with a main control chip U2 and a resistor R17. The model of the main control chip U2 is PY32C616. The main control chip U2 has 25 pins. Pin 1 of the main control chip U2 is connected to the output of the voltage-stabilized power supply circuit through resistor R17. Pins 4, 6, and 23 of the main control chip U2 are connected to the input of the encryption communication circuit. Pins 5 and 21 of the main control chip U2 are connected to the input of the liquid atomization control circuit. Pins 9, 7, 8, 10, 12, 14, 13, and 15 of the main control chip U2 are connected to the input of the digital tube display circuit. Pin 2 of the main control chip U2 is connected to the output of the microphone switch control circuit. In this embodiment, the main control circuit of the electronic cigarette body is used to control the on / off of the liquid atomization control circuit and the cartridge atomizer circuit based on the cartridge information in the cartridge atomizer circuit fed back by the encryption communication circuit.

[0031] like Figure 3 As shown, the voltage-regulated power supply circuit includes a voltage regulator chip U1, model LP4068. This chip has five pins: Pin 4 of the chip is connected to the power supply, Pin 3 of the chip is connected to Pin 1 of the main control chip U2 and the power supply for the e-liquid atomization control circuit, and Pin 2 of the chip is grounded. In this embodiment, the voltage-regulated power supply circuit is used to power the main control circuit of the electronic cigarette body, the e-liquid atomization control circuit, and the microphone switch control circuit.

[0032] like Figure 4 As shown, the encrypted communication circuit includes a field-effect transistor Q6, a resistor R4, a resistor R25, and a resistor R27. The gate of the field-effect transistor Q6 is connected to one end of the resistor R25 and pin 4 of the main control chip U2. The drain of the field-effect transistor Q6 is connected to one end of the resistor R4, one end of the resistor R27, and the cartridge atomizer circuit. The other end of the resistor R4 is connected to pin 6 of the main control chip U2, and the other end of the resistor R27 is connected to pin 23 of the main control chip U2. The source of the field-effect transistor Q6 and the other end of the resistor R25 are grounded. In this embodiment, the encrypted communication circuit is used to communicate with the cartridge atomizer circuit to obtain cartridge information and feed it back to the main control circuit of the electronic cigarette body.

[0033] like Figure 5 As shown, the cigarette cartridge atomizer circuit includes an atomizer chip U3 and a field-effect transistor Q7. The model of atomizer chip U3 is RJGT105. Atomizer chip U3 has six pins. Pin 1 of atomizer chip U3 is connected to the source of field-effect transistor Q7 and the drain of field-effect transistor Q6. The gate of field-effect transistor Q7 is connected to the output of the smoke oil atomization control circuit. Pin 2 of atomizer chip U3 and the drain of field-effect transistor Q7 are grounded. In this embodiment, the cigarette cartridge atomizer circuit is used to transmit information from the cigarette cartridge to the encrypted communication circuit and atomize the smoke oil under power from the smoke oil atomization control circuit.

[0034] like Figure 6 As shown, the e-liquid atomization control circuit includes a field-effect transistor (FET) Q5 and a resistor R2. The gate of FET Q5 is connected to pin 21 of the main control chip U2, the source of FET Q5 is connected to pin 3 of the voltage regulator chip U1, the drain of FET Q5 is connected to one end of resistor R2 and the gate of FET Q7, and the other end of resistor R2 is connected to pin 5 of the main control chip U2. In this embodiment, the e-liquid atomization control circuit is used to power the cartridge atomizer circuit based on control signals from the main control circuit of the electronic cigarette body.

[0035] like Figure 7 As shown, the microphone switch control circuit includes a microphone switch M1 and a resistor R18. The microphone switch M1 has three pins. Pin 1 of the microphone switch M1 is connected to pin 3 of the voltage regulator chip U1 through resistor R18. Pin 3 of the microphone switch M1 is connected to pin 2 of the main control chip U2. In this embodiment, the microphone switch control circuit is used to turn the main control circuit of the electronic cigarette body on and off.

[0036] like Figure 8As shown, the digital tube display circuit is provided with a display interface J1. The output end of the display interface J1 is connected to the digital display tube. The input end of the display interface J1 is provided with 12 pins. Pins 1, 2, 3, 4, 5, 6, 7, and 8 of the display interface J1 are respectively connected to pins 9, 7, 8, 10, 12, 14, 13, and 15 of the main control chip U2. In this embodiment, the digital tube display circuit is used to display the electronic cigarette body and cigarette cartridge information provided by the main control circuit of the electronic cigarette body.

[0037] As can be seen from the above, the utility model provides an electronic cigarette control circuit with a cartridge encryption function. By arranging mutually coordinated voltage-stabilized power supply circuit, electronic cigarette main body main control circuit, encryption communication circuit, smoke oil atomization control circuit, smoke cartridge atomizer circuit, microphone switch control circuit and digital tube display circuit in the electronic cigarette control circuit with the cartridge encryption function, the electronic cigarette main body control circuit can control the on and off of the smoke oil atomization control circuit and the smoke cartridge atomizer circuit according to the smoke cartridge information in the smoke cartridge atomizer circuit fed back by the encryption communication circuit, and can realize encryption matching between the electronic cigarette main body and the smoke cartridge. Only when the smoke cartridge that meets the encryption matching is connected, the electronic cigarette main body will supply power to the smoke cartridge atomizer. The circuit structure is simple, which greatly improves the safety of the electronic cigarette and the user experience, and solves the problems in the prior art of insufficient atomization, easy damage to the atomizer and poor safety caused by the unlimited combination of electronic cigarettes and smoke cartridges.

[0038] The specific implementation methods described above are preferred implementation methods of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. An electronic cigarette control circuit with a cartridge encryption function, characterized by: The electronic cigarette comprises a voltage-stabilized power supply circuit, an electronic cigarette main control circuit, an encrypted communication circuit, a smoke oil atomization control circuit, a smoke cartridge atomizer circuit, a microphone switch control circuit, and a digital tube display circuit. The input end of the voltage-stabilized power supply circuit is connected to a power supply, and the output end of the voltage-stabilized power supply circuit is connected to the electronic cigarette main control circuit and the smoke oil atomization control circuit for power supply. The output end of the electronic cigarette main control circuit is connected to the input end of the encrypted communication circuit, the input end of the smoke oil atomization control circuit, and the input end of the digital tube display circuit. The encrypted communication circuit is communicatively connected to the smoke cartridge atomizer circuit, the output end of the smoke oil atomization control circuit is connected to the input end of the smoke cartridge atomizer circuit, the input end of the electronic cigarette main control circuit is also connected to the output end of the microphone switch control circuit, and the output end of the digital tube display circuit is connected to a digital display tube. The electronic cigarette main control circuit can control the on / off of the smoke oil atomization control circuit and the smoke cartridge atomizer circuit according to the smoke cartridge information in the smoke cartridge atomizer circuit fed back by the encrypted communication circuit.

2. The electronic cigarette control circuit with cartridge encryption function according to claim 1, characterized in that: The main control circuit of the electronic cigarette body is provided with a main control chip U2 and a resistor R17. The main control chip U2 is provided with 25 pins. The first pin of the main control chip U2 is connected to the output end of the voltage-stabilized power supply circuit through the resistor R17. The 4th, 6th and 23rd pins of the main control chip U2 are connected to the input end of the encryption communication circuit. The 5th and 21st pins of the main control chip U2 are connected to the input end of the smoke oil atomization control circuit. The 9th, 7th, 8th, 10th, 12th, 14th, 13th and 15th pins of the main control chip U2 are connected to the input end of the digital tube display circuit. The 2nd pin of the main control chip U2 is connected to the output end of the microphone switch control circuit.

3. The electronic cigarette control circuit with cartridge encryption function according to claim 2, characterized in that: A voltage regulator chip U1 is provided in the voltage-regulated power supply circuit. The voltage regulator chip U1 has 5 pins. The 4th pin of the voltage regulator chip U1 is connected to the power supply, the 3rd pin of the voltage regulator chip U1 is connected to the 1st pin of the main control chip U2 and the power supply of the e-liquid atomization control circuit, and the 2nd pin of the voltage regulator chip U1 is grounded.

4. The electronic cigarette control circuit with cartridge encryption function according to claim 3, characterized in that: The encrypted communication circuit is provided with a field effect transistor Q6, a resistor R4, a resistor R25 and a resistor R27. The gate of the field effect transistor Q6 is connected to one end of the resistor R25 and the 4th pin of the main control chip U2. The drain of the field effect transistor Q6 is connected to one end of the resistor R4, one end of the resistor R27 and the cigarette cartridge atomizer circuit. The other end of the resistor R4 is connected to the 6th pin of the main control chip U2. The other end of the resistor R27 is connected to the 23rd pin of the main control chip U2. The source of the field effect transistor Q6 and the other end of the resistor R25 are grounded.

5. The electronic cigarette control circuit with cartridge encryption function according to claim 4, characterized in that: The cigarette cartridge atomizer circuit is provided with an atomizer chip U3 and a field effect transistor Q7. The atomizer chip U3 is provided with 6 pins. The first pin of the atomizer chip U3 is connected to the source of the field effect transistor Q7 and the drain of the field effect transistor Q6. The gate of the field effect transistor Q7 is connected to the output end of the cigarette oil atomization control circuit. The second pin of the atomizer chip U3 and the drain of the field effect transistor Q7 are grounded.

6. The electronic cigarette control circuit with cartridge encryption function according to claim 5, characterized in that: The e-liquid atomization control circuit is provided with a field-effect transistor Q5 and a resistor R2. The gate of the field-effect transistor Q5 is connected to the 21st pin of the main control chip U2, the source of the field-effect transistor Q5 is connected to the 3rd pin of the voltage-stabilizing diode chip U1, the drain of the field-effect transistor Q5 is connected to one end of the resistor R2 and the gate of the field-effect transistor Q7, and the other end of the resistor R2 is connected to the 5th pin of the main control chip U2.

7. The electronic cigarette control circuit with cartridge encryption function according to claim 6, characterized in that: The microphone switch control circuit is provided with a microphone switch M1 and a resistor R18. The microphone switch M1 has three pins. The first pin of the microphone switch M1 is connected to the third pin of the voltage regulator chip U1 through the resistor R18. The third pin of the microphone switch M1 is connected to the second pin of the main control chip U2.

8. The electronic cigarette control circuit with cartridge encryption function according to claim 7, characterized in that: The digital tube display circuit is provided with a display interface J1, the output end of the display interface J1 is connected to the digital display tube, the input end of the display interface J1 is provided with 12 pins, and the 1st, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th pins of the display interface J1 are respectively connected to the 9th, 7th, 8th, 10th, 12th, 14th, 13th and 15th pins of the main control chip U2.

9. The electronic cigarette control circuit with cartridge encryption function according to claim 8, characterized in that: The model of the main control chip U2 is PY32C616.

10. The electronic cigarette control circuit with cigarette cartridge encryption function according to claim 9, characterized in that: The model of the atomizer chip U3 is RJGT105, and the model of the voltage regulator chip U1 is LP4068.

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