Electronic cigarette chip circuit

Abstract

The utility model discloses an electronic cigarette chip circuit which comprises a core logic circuit, the core logic circuit is connected with an LED output control circuit, a load detection circuit, an output drive circuit, a protection circuit, an efuse circuit, a behavior judgment logic circuit and a capacitance detection circuit, the efuse circuit is connected with a basic global variable circuit and the behavior judgment logic circuit, and the capacitance detection circuit is connected with the basic global variable circuit. The basic global variable circuit is connected with the protection circuit and the charging management circuit, the behavior judgment logic circuit is connected with the capacitance detection circuit and the key detection circuit, and the output driving circuit is connected with the load detection circuit. The beneficial effects of the utility model are that the integration difficulty of a single chip is reduced, and the investment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic cigarette chips, and in particular to an electronic cigarette chip circuit. Background Art

[0002] Compared with traditional cigarettes, new electronic cigarettes are less harmful to the human body, safer and more environmentally friendly to use. The number of smokers replacing traditional cigarettes with electronic cigarettes is increasing year by year.

[0003] Most of the electronic cigarette solution systems on the market today are implemented using MCU plus airflow sensors. Due to the addition of MCU, this solution has high power consumption, large area and poor reliability. The market has also developed chips that combine MCU and airflow sensor chips or integrate them into a single chip. However, combining chips cannot completely reduce costs, and there are problems such as difficulty in single-chip integration and excessive cost investment. Utility Model Content

[0004] In view of the shortcomings of the existing technology that single chip integration is difficult and the cost investment is too high, the present application proposes an electronic cigarette chip circuit, which reduces the difficulty of single chip integration and reduces the investment cost.

[0005] The following is the technical solution of the utility model, an electronic cigarette chip circuit, including: a core logic circuit, the core logic circuit is connected to an LED output control circuit, a load detection circuit, an output drive circuit, a protection circuit, an efuse circuit, a behavior determination logic circuit and a capacitance detection circuit, the efuse circuit is connected to a basic global variable circuit and a behavior determination logic circuit, the basic global variable circuit is connected to a protection circuit and a charging management circuit, the behavior determination logic circuit is connected to a capacitance detection circuit and a key detection circuit, and the output drive circuit is connected to a load detection circuit.

[0006] Preferably, the LED output control circuit is connected to the LED output pin LED1, the LED output pin LED2 and the LED output pin LED3, the output drive circuit and the load detection circuit are connected to the output pin OUT, the charging management circuit is connected to the charging pin VCC, the charging management circuit, the basic global variable circuit and the protection circuit are connected to the power pin VDD, the key detection circuit is connected to the key pin KEY1 and the key pin KEY2, and the capacitance detection circuit is connected to the sensor access pin SEN.

[0007] Preferably, the power pin VDD is connected to the power supply; the charging pin VCC is connected to the charging port; the ground pin GND is connected to the negative electrode of the power supply, the negative electrode of the button, the negative electrode of the LED device, the negative electrode of the load resistor and the negative electrode of the sensor; the output pin OUT is connected to the positive electrode of the load; the sensor access pin SEN is connected to the positive electrode of the sensor; the button pin KEY1 is connected to the positive end of the first button, and the button pin KEY2 is connected to the positive end of the second button; the LED output pin LED1 is connected to the positive electrode of the first LED device, the LED output pin LED2 is connected to the positive electrode of the second LED device, and the LED output pin LED3 is connected to the positive electrode of the third LED device.

[0008] Preferably, the protection circuit includes an overvoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit.

[0009] Preferably, the basic global variable circuit includes a reference circuit, a bias circuit, an oscillator circuit and an enable circuit.

[0010] Preferably, the key pin KEY1 and the key pin KEY2 are pulled down and connected to the ground port GND, and are pulled up and connected to the power pin VDD.

[0011] Preferably, the chip is provided with a button access port, a sensor access port and a load detection circuit.

[0012] The beneficial effects of the utility model are as follows: function selection is realized through operations such as pressing buttons, plugging and unplugging, and suction, and combined operations, thereby reducing the difficulty of single-chip integration and reducing investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a chip pin diagram of an electronic cigarette chip circuit of the utility model;

[0014] Figure 2 This is a circuit connection diagram of an electronic cigarette chip circuit of the utility model;

[0015] Figure 3 This is a working principle state diagram of an electronic cigarette chip circuit of the utility model;

[0016] In the figure:

[0017] 10. Chip; 20. Power supply; 30. First button; 40. Second button; 50. Sensor; 60. First LED device; 70. Second LED device; 80. Third LED device; 90. Load;

[0018] 101. Charging management circuit; 102. Basic global variable circuit; 103. Protection circuit; 104. Efuse circuit; 105. Key detection circuit; 106. Behavior determination logic circuit; 107. Capacitance detection circuit; 108. Core logic circuit; 109. LED output control circuit; 110. Load detection circuit; 111. Output drive circuit. DETAILED DESCRIPTION

[0019] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Example

[0021] like Figures 1 to 3 As shown, an electronic cigarette chip circuit includes:

[0022] Core logic circuit 108, charging management circuit 101, protection circuit 103, basic global variable circuit 102, output drive circuit 111, load detection circuit 110, key detection circuit 105, efuse (one-time programmable memory, electronic fuse) circuit 104, capacitance detection circuit 107, behavior determination logic circuit 106 and LED output control circuit 109.

[0023] The core logic circuit 108 is connected to the LED output control circuit 109, the load detection circuit 110, the output drive circuit 111, the protection circuit 103, the efuse circuit 104, the behavior determination logic circuit 106 and the capacitance detection circuit 107; the efuse circuit 104 is connected to the basic global variable circuit 102 and the behavior determination logic circuit 106; the basic global variable circuit 102 is connected to the protection circuit 103 and the charging management circuit 101; the behavior determination logic circuit 106 is connected to the capacitance detection circuit 107 and the button detection circuit 105; and the output drive circuit 111 is connected to the load detection circuit 110.

[0024] Among them, the LED output control circuit 109 is connected to the LED output pin LED1, the LED output pin LED2 and the LED output pin LED3, the output drive circuit 111 and the load detection circuit 110 are connected to the output pin OUT, the charging management circuit 101 is connected to the charging pin VCC, the charging management circuit 101, the basic global variable circuit 102 and the protection circuit 103 are connected to the power pin VDD, the key detection circuit 105 is connected to the key pin KEY1 and the key pin KEY2, and the capacitance detection circuit 107 is connected to the sensor access pin SEN.

[0025] The charging management circuit 101 implements a charging control circuit for charging VCC to VDD;

[0026] The protection circuit 103 is a general term for various protection circuits 103 inside the chip 10 , and the protection circuit 103 includes an overvoltage protection circuit 103 , an overcurrent protection circuit 103 , and an overtemperature protection circuit 103 ;

[0027] The basic global variable circuit 102 is a general term for commonly used circuits inside the chip 10. The basic global variable circuit 102 includes a reference circuit, a bias circuit, an oscillator circuit, an enable circuit, etc.;

[0028] The output drive circuit 111 is a control and logic circuit of the output tube;

[0029] The load detection circuit 110 is a network circuit for feedback detection of changes in physical quantities such as voltage and current of the load 90;

[0030] The key detection circuit 105 is a circuit for detecting changes in electrical parameters caused by key changes;

[0031] The efuse circuit 104 is a one-time adjustable circuit, which is used to change the internal control word of the chip 10, so as to realize the selection of some functions or the adjustment of performance;

[0032] The capacitance detection circuit 107 is used to convert the change of the sensor 50 into the change of the electrical signal;

[0033] The behavior determination logic circuit 106 is used to compile the combined behavior of key presses and capacitance value changes;

[0034] The core logic circuit 108 is used to implement the calculation of the physical quantity change of each pin of the chip 10 to the output logic, and finally determine the working state and output performance of the chip 10;

[0035] The LED output control circuit 109 is used to convert the core logic output signal into LED output.

[0036] The chip 10 has a key access port, a sensor 50 access port and a load detection circuit 110. The behavior is identified by the behavior logic circuit, so that the function and output are set or adjusted during the operation of the chip 10.

[0037] The behavior logic circuit defines the priority and meaning of the behavior combination for the key input, the sensor 50 signal input and the load detection circuit 110. When different behavior logic combinations are detected, corresponding outputs are made to the core logic circuit 108, thereby controlling the behavior of the output OUT of the chip 10.

[0038] In this embodiment, the key pin KEY1 and the key pin KEY2 are used as key inputs to save hardware costs.

[0039] The pins of the chip 10 include: a power pin VDD, a charging pin VCC, a ground pin GND, an output pin OUT, a sensor access pin SEN, a key pin KEY1, a key pin KEY2, an LED output pin LED1, an LED output pin LED2 and an LED output pin LED3.

[0040] The power pin VDD is connected to the power source 20, such as the positive terminal of a lithium battery electrode; the charging pin VCC is connected to the charging port; the ground pin GND is connected to the negative terminal of the power source 20, the negative terminal of the button, the negative terminal of the LED device, the negative terminal of the load 90 resistor and the negative terminal of the sensor 50; the output pin OUT is connected to the positive terminal of the load 90; the sensor access pin SEN is connected to the positive terminal of the sensor 50; the button pin KEY1 is connected to the positive terminal of the first button 30, and the button pin KEY2 is connected to the positive terminal of the second button 40; the LED output pin LED1 is connected to the positive terminal of the first LED device 60, the LED output pin LED2 is connected to the positive terminal of the second LED device 70, and the LED output pin LED3 is connected to the positive terminal of the third LED device 80.

[0041] When the charging pin VCC is connected to the charging port, the lithium battery is charged; when charging, the LED output pin LED1, the LED output pin LED2 and the LED output pin LED3 make different outputs according to the current power.

[0042] The key pin KEY1 and the key pin KEY2 can be pulled down to connect to the ground port GND, or pulled up to connect to the power pin VDD.

[0043] The utility model realizes function selection through operations such as pressing buttons, plugging and unplugging, and suction, and combined operations, thereby reducing the difficulty of integrating the single chip 10 and reducing the investment cost.

[0044] The utility model realizes function selection through operations such as pressing buttons, plugging and unplugging, and suction, and combined operations, thereby reducing the difficulty of integrating the single chip 10 and reducing the investment cost.

[0045] Working principle: When the chip 10 is in the power-off state, a lithium battery can be plugged in, that is, VDD is connected, and the chip 10 enters the standby state. Alternatively, when there is no lithium battery, VCC can be plugged in, and the chip 10 enters the charging state from the power-off state. If there is a lithium battery, the chip 10 first enters the standby state from the power-off state, and then enters the charging state. In the charging state, the LED device displays the power level. Three LED devices can be used to display the power level, or a light can be used to display the power level by the number of flashes. When the charging port is unplugged, the chip 10 enters the standby state. In the standby state, the chip 10 can be activated and transferred to the efuse burning mode through pin multiplexing technology. In this mode, some static functions and parameters of the chip 10 can be adjusted. After the burning is completed, the power is turned off to enter the power-off mode, and the power is turned on to enter the standby mode. In the standby mode, the selectable working state can be entered by a combination of actions such as buttons. In the selectable working state, the sensor changes can be caused by inhalation to enter the output mode. In the selectable working state, the LED selection mode can be entered by a combination of actions such as buttons. In this state, the LED behavior indication can be selected, such as checking the power level. In the selectable working state, you can enter the preheating mode by pressing buttons and other combinations of actions. In this state, you can select the preheating time and enter the preheating mode randomly. After the preheating is completed, if no action is taken within the specified time, the preheating mode returns to the selectable working state. In the selectable working state, you can enter the output gear adjustment mode by pressing buttons and other combinations of actions. In this state, if you do not smoke within the specified time after the setting is completed, it returns to the selectable working state, and the set gear is maintained until the next setting or before the power is turned off.

[0046] The control method of the present invention is controlled by the chip 10. The control circuit of the chip 10 can be realized by simple programming by a person skilled in the art, so the present invention will not explain the control method in detail.

[0047] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electronic cigarette chip circuit, characterized in that: include: Core logic circuit, the core logic circuit is connected to the LED output control circuit, the load detection circuit, the output drive circuit, the protection circuit, the efuse circuit, the behavior determination logic circuit and the capacitance detection circuit, the efuse circuit is connected to the basic global variable circuit and the behavior determination logic circuit, the basic global variable circuit is connected to the protection circuit and the charging management circuit, the behavior determination logic circuit is connected to the capacitance detection circuit and the button detection circuit, and the output drive circuit is connected to the load detection circuit.

2. An electronic cigarette chip circuit according to claim 1, characterized in that: The LED output control circuit is connected to the LED output pin LED1, the LED output pin LED2 and the LED output pin LED3, the output drive circuit and the load detection circuit are connected to the output pin OUT, the charging management circuit is connected to the charging pin VCC, the charging management circuit, the basic global variable circuit and the protection circuit are connected to the power pin VDD, the key detection circuit is connected to the key pin KEY1 and the key pin KEY2, and the capacitance detection circuit is connected to the sensor access pin SEN.

3. The electronic cigarette chip circuit according to claim 1, characterized in that: The power pin VDD is connected to the power supply; the charging pin VCC is connected to the charging port; the ground pin GND is connected to the negative pole of the power supply, the negative pole of the button, the negative pole of the LED device, the negative pole of the load resistor and the negative pole of the sensor; the output pin OUT is connected to the positive pole of the load; the sensor access pin SEN is connected to the positive pole of the sensor; the button pin KEY1 is connected to the positive end of the first button, and the button pin KEY2 is connected to the positive end of the second button; the LED output pin LED1 is connected to the positive pole of the first LED device, the LED output pin LED2 is connected to the positive pole of the second LED device, and the LED output pin LED3 is connected to the positive pole of the third LED device.

4. The electronic cigarette chip circuit according to claim 1, characterized in that: The protection circuit includes an overvoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit.

5. An electronic cigarette chip circuit according to claim 1 or 4, characterized in that: The basic global variable circuits include reference circuits, bias circuits, oscillator circuits, and enable circuits.

6. The electronic cigarette chip circuit according to claim 3, characterized in that: The key pin KEY1 and the key pin KEY2 are pulled down and connected to the ground port GND, and are pulled up and connected to the power pin VDD.

7. The electronic cigarette chip circuit according to claim 1, characterized in that: The chip is provided with a button access port, a sensor access port and a load detection circuit.

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