阅读说明：本技术 一种可调状态的电子烟驱动芯片及电子烟 (Electronic cigarette driving chip with adjustable state and electronic cigarette ) 是由 吴建霖 温彦衫 谢徐豪 吴必刚 吴宣呈 吕凯帆 于 2021-09-08 设计创作，主要内容包括：本发明公开一种可调状态的电子烟驱动芯片,包括逻辑功能电路,可调状态的电子烟驱动芯片还包括与所述逻辑功能电路连接的一次性可编程存储电路,所述一次性可编程存储电路包括：电压输出电路,其一端连接电源；多晶硅熔线,其串接在所述电源与电压输出电路之间；熔断控制场效应管,其栅极与所述逻辑功能电路连接,漏极连接在所述多晶硅熔线与电压输出电路的连接处,源极接地。本发明还公开了一种具有上述可调状态的电子烟驱动芯片的电子烟。本发明可用于电子烟。(The invention discloses a state-adjustable electronic cigarette driving chip, which comprises a logic function circuit, and a one-time programmable storage circuit connected with the logic function circuit, wherein the one-time programmable storage circuit comprises: a voltage output circuit, one end of which is connected with a power supply; the polycrystalline silicon fuse wire is connected between the power supply and the voltage output circuit in series; and the grid electrode of the fusing control field effect transistor is connected with the logic function circuit, the drain electrode of the fusing control field effect transistor is connected with the joint of the polycrystalline silicon fuse wire and the voltage output circuit, and the source electrode of the fusing control field effect transistor is grounded. The invention also discloses an electronic cigarette with the electronic cigarette driving chip with the adjustable state. The invention can be used for electronic cigarettes.)

1. The utility model provides an electron cigarette driver chip of adjustable state, includes logic function circuit, its characterized in that: the electronic cigarette driving chip with the adjustable state further comprises a one-time programmable storage circuit connected with the logic function circuit, wherein the one-time programmable storage circuit comprises:

a voltage output circuit, one end of which is connected with a power supply;

the polycrystalline silicon fuse wire is connected between the power supply and the voltage output circuit in series;

and the grid electrode of the fusing control field effect transistor is connected with the logic function circuit, the drain electrode of the fusing control field effect transistor is connected with the joint of the polycrystalline silicon fuse wire and the voltage output circuit, and the source electrode of the fusing control field effect transistor is grounded.

2. The state-adjustable electronic cigarette driving chip according to claim 1, wherein: the voltage output circuit includes: the first field effect transistor, the second field effect transistor, the third field effect transistor, the fourth field effect transistor, the fifth field effect transistor, the sixth field effect transistor, the seventh field effect transistor, the first resistor, the second resistor, the third resistor and the fourth resistor;

the polycrystalline silicon fuse wire comprises a first polycrystalline silicon fuse wire and a second polycrystalline silicon fuse wire;

the fusing control field effect transistor comprises a first fusing control field effect transistor and a second fusing control field effect transistor;

the first polysilicon fuse wire, the second polysilicon fuse wire and the power supply are connected with the seventh field effect tube, the grid electrode of the seventh field effect tube is connected with the fourth resistor, the grid electrodes of the first field effect tube and the second field effect tube are connected together, the drain electrodes of the first field effect tube and the second field effect tube are respectively connected with the drain electrodes of the third field effect tube and the fourth field effect tube, the grid electrodes of the third field effect tube and the fourth field effect tube are connected together, and the drain electrodes are connected together; the grid electrodes of the fifth field effect tube and the sixth field effect tube are respectively connected with the drain electrodes of the first field effect tube and the second field effect tube, the first resistor is connected between the drain electrode and the source electrode of the fifth field effect tube in parallel, and the second resistor and the third resistor are connected between the drain electrode and the source electrode of the sixth field effect tube in parallel;

the drain electrodes of the first fusing control field effect transistor and the second fusing control field effect transistor are respectively connected with the first polycrystalline silicon fuse wire and the second polycrystalline silicon fuse wire, the source electrodes are grounded, and the grid electrodes are connected with the logic function circuit.

3. The state-adjustable electronic cigarette driving chip according to claim 2, wherein: the electronic cigarette driving chip comprises:

the airflow sensing circuit is used for detecting the capacitance value change of the microphone and outputting a sensing signal;

an oscillator connected with the logic function circuit and used for generating an oscillation signal;

and the logic function circuit is connected with the airflow sensing circuit and the oscillator, calculates the frequency of the induction signal according to the oscillation signal, and outputs an atomization signal when the frequency of the induction signal is within a set frequency range.

4. The state-adjustable electronic cigarette driving chip according to claim 3, wherein: the electronic cigarette driving chip also comprises an induction signal amplifying circuit which is connected between the airflow sensor circuit and the logic function circuit in series, amplifies the induction signal and converts the induction signal into a square wave signal to be output to the logic function circuit.

5. The state-adjustable electronic cigarette driving chip according to claim 4, wherein: the electronic cigarette driving chip further comprises a temperature control circuit which is connected with the logic function circuit and used for controlling the temperature of the driving chip.

6. The state-adjustable electronic cigarette driving chip according to claim 5, wherein: the electronic cigarette driving chip further comprises an overcurrent protection circuit which is connected with the logic function circuit and used for entering a standby mode when the output voltage exceeds a preset voltage.

7. The state-adjustable electronic cigarette driving chip according to claim 6, wherein: the electronic cigarette driving chip further comprises a charging circuit connected with the logic function circuit.

8. The state-tunable electronic cigarette driving chip of claim 7, wherein: the driving chip further comprises an LED control circuit which is connected with the logic function circuit and controls the LED to be turned on, turned off or flickered according to the working state of the electronic cigarette.

9. An electronic cigarette, characterized in that: the electronic cigarette comprises the electronic cigarette driving chip with the adjustable state as claimed in any one of claims 1 to 8.

10. The electronic cigarette of claim 9, wherein: the electronic cigarette further comprises:

a body;

the human body infrared sensor is arranged on the body and sends out a wake-up signal after detecting a human body;

the logic function circuit is connected with the human body infrared sensor, is in a standby state in a normal state and recovers to a normal working state after receiving the wake-up signal.

Technical Field

The invention relates to an electronic cigarette, in particular to an electronic cigarette driving chip.

Background

The electronic cigarette generally comprises a body, an electronic cigarette microphone and an electronic cigarette driving chip, wherein the electronic cigarette microphone and the electronic cigarette driving chip are arranged in the body, and various control circuits such as an overcurrent protection circuit, an LED control circuit, a temperature control circuit and the like are usually arranged in the electronic cigarette driving chip. The existing electronic cigarette driving chip generally utilizes a field effect transistor as a switching element to control various control circuits, and controls various control circuits through the field effect transistor, although the control mode can also debug the working state required by a user, the debugged working state is easier to modify, and the user experience is poorer.

Disclosure of Invention

The invention provides an electronic cigarette driving chip with an adjustable state and an electronic cigarette, and aims to solve the technical problems that the working state of the electronic cigarette after debugging is easy to modify and the user experience is poor in the prior art.

In order to solve the technical problem, the invention adopts a technical scheme that an electronic cigarette driving chip with an adjustable state is designed, the electronic cigarette driving chip comprises a logic function circuit, the electronic cigarette driving chip with the adjustable state further comprises a one-time programmable storage circuit connected with the logic function circuit, and the one-time programmable storage circuit comprises:

a voltage output circuit, one end of which is connected with a power supply;

the polycrystalline silicon fuse wire is connected between the power supply and the voltage output circuit in series;

and the grid electrode of the fusing control field effect transistor is connected with the logic function circuit, the drain electrode of the fusing control field effect transistor is connected with the joint of the polycrystalline silicon fuse wire and the voltage output circuit, and the source electrode of the fusing control field effect transistor is grounded.

The voltage output circuit includes: the first field effect transistor, the second field effect transistor, the third field effect transistor, the fourth field effect transistor, the fifth field effect transistor, the sixth field effect transistor, the seventh field effect transistor, the first resistor, the second resistor, the third resistor and the fourth resistor;

the polycrystalline silicon fuse wire comprises a first polycrystalline silicon fuse wire and a second polycrystalline silicon fuse wire;

the fusing control field effect transistor comprises a first fusing control field effect transistor and a second fusing control field effect transistor;

the first polysilicon fuse wire, the second polysilicon fuse wire and the power supply are connected with the seventh field effect tube, the grid electrode of the seventh field effect tube is connected with the fourth resistor, the grid electrodes of the first field effect tube and the second field effect tube are connected together, the drain electrodes of the first field effect tube and the second field effect tube are respectively connected with the drain electrodes of the third field effect tube and the fourth field effect tube, the grid electrodes of the third field effect tube and the fourth field effect tube are connected together, and the drain electrodes are connected together; the grid electrodes of the fifth field effect tube and the sixth field effect tube are respectively connected with the drain electrodes of the first field effect tube and the second field effect tube, the first resistor is connected between the drain electrode and the source electrode of the fifth field effect tube in parallel, and the second resistor and the third resistor are connected between the drain electrode and the source electrode of the sixth field effect tube in parallel;

the drain electrodes of the first fusing control field effect transistor and the second fusing control field effect transistor are respectively connected with the first polycrystalline silicon fuse wire and the second polycrystalline silicon fuse wire, the source electrodes are grounded, and the grid electrodes are connected with the logic function circuit.

The electronic cigarette driving chip comprises:

the airflow sensing circuit is used for detecting the capacitance value change of the microphone and outputting a sensing signal;

an oscillator connected with the logic function circuit and used for generating an oscillation signal;

and the logic function circuit is connected with the airflow sensing circuit and the oscillator, calculates the frequency of the induction signal according to the oscillation signal, and outputs an atomization signal when the frequency of the induction signal is within a set frequency range.

The electronic cigarette driving chip also comprises an induction signal amplifying circuit which is connected between the airflow sensor circuit and the logic function circuit in series, amplifies the induction signal and converts the induction signal into a square wave signal to be output to the logic function circuit.

The electronic cigarette driving chip further comprises a temperature control circuit which is connected with the logic function circuit and used for controlling the temperature of the driving chip.

The electronic cigarette driving chip further comprises an overcurrent protection circuit which is connected with the logic function circuit and used for entering a standby mode when the output voltage exceeds a preset voltage.

The electronic cigarette driving chip further comprises a charging circuit connected with the logic function circuit.

The driving chip further comprises an LED control circuit which is connected with the logic function circuit and controls the LED to be turned on, turned off or flickered according to the working state of the electronic cigarette.

The invention also provides an electronic cigarette, which comprises the electronic cigarette driving chip with the adjustable state.

The electronic cigarette further comprises:

a body;

the human body infrared sensor is arranged on the body and sends out a wake-up signal after detecting a human body;

the logic function circuit is connected with the human body infrared sensor, is in a standby state in a normal state and recovers to a normal working state after receiving the wake-up signal.

According to the invention, the polycrystalline silicon fuse wire and the fusing control field effect tube are arranged, and the logic function control circuit is used for controlling the fusing control field effect tube to be switched on and off so as to realize the switching on and off of the corresponding polycrystalline silicon fuse wire, so that the voltage output circuit is adjusted, and as some polycrystalline silicon fuse wires are fused, the polycrystalline silicon fuse wire is not easy to be modified again after being adjusted to a state required by a user, and the experience of the user is better.

Drawings

The invention is described in detail below with reference to examples and figures, in which:

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a schematic diagram of the one time programmable memory circuit of the present invention;

FIG. 3 is a circuit diagram of the one time programmable memory circuit of the present invention;

figure 4 is a block diagram of the electronic cigarette of the present invention.

Detailed Description

The embodiments of the invention are further illustrated in the following figures:

please refer to fig. 1 to 3. The electronic cigarette driving circuit comprises an electronic cigarette driving chip 1 in an adjustable state and a driving MOS (metal oxide semiconductor) tube 2 which is positioned outside the electronic cigarette driving chip and connected with the electronic cigarette driving chip. Through arranging the drive MOS outside the tube in the drive chip of the electronic cigarette, the built-in structure of the drive MOS tube of the existing drive chip of the electronic cigarette is changed, the drive capability can be determined according to actual needs, the drive capability is stronger, and the adaptability is better.

In order to facilitate the control of the output voltage, the electronic cigarette driving circuit further comprises a feedback circuit 3 connected with the driving MOS transistor, the electronic cigarette driving chip 1 comprises a logic function circuit 11 and a PWM circuit 12 connected with the logic function circuit, the input end of the PWM circuit is connected with the output end of the feedback circuit 3, and the output end of the PWM circuit is connected with the driving MOS transistor 2.

The voltage output by the driving MOS tube is converted into a digital signal and then is compared with a preset voltage value. When the voltage exceeds a preset voltage value, the voltage is fed back to the logic function circuit through the feedback circuit, and the logic function circuit reduces the duty ratio of the PWM circuit, so that the output voltage of the driving MOS tube is controlled to be reduced. When the voltage is lower than the preset voltage value, the duty ratio of the PWM circuit is increased; when the voltage reaches the preset voltage value, the driving MOS tube is separated from the control of the PWM circuit.

In order to prevent the electronic cigarette from being started by mistake under the influence of environmental factors, the electronic cigarette driving chip further comprises an airflow sensing circuit 13 and an oscillator 14. Wherein:

the airflow sensing circuit 13 is connected with the logic function circuit and used for detecting the capacitance value change of the electronic cigarette microphone and outputting a sensing signal. The electronic cigarette microphone comprises a pole piece and a diaphragm, wherein the pole piece and the diaphragm form a capacitor, the distance between the diaphragm and the pole piece is changed during smoking, so that the capacitance value is changed, and the vibration condition of the diaphragm can be known by detecting the change of the capacitance value of the electronic cigarette microphone through the airflow sensing circuit.

The airflow sensing circuit comprises an operational amplification circuit, the operational amplification circuit is connected with the electronic cigarette microphone, the capacitance value generated by the vibration of a diaphragm of the electronic cigarette microphone changes, and a signal is processed by the operational amplification circuit to generate a square wave signal to be output, namely, a sensing signal is output in a square wave form.

An oscillator 14 is connected with the logic function circuit and is used to generate an oscillating signal. The oscillator generates an oscillation signal of a certain frequency.

And the logic function circuit calculates the frequency of the induction signal according to the oscillation signal and outputs an atomization signal when the frequency of the induction signal is in a set frequency range.

And an operational amplification circuit in the logic function circuit compares the oscillation signal with the induction signal, and calculates the frequency of the square wave signal generated by the change of the capacitance value according to the oscillation signal, thereby judging the change of the electronic cigarette. Because the smoking action produces a specific change in capacitance, a square wave signal of a specific frequency is produced. When the logic function circuit detects the square wave signal in the range, the atomization signal is output to trigger the smoking work mode, so that the smoking sensitivity of the electronic cigarette is ensured, and meanwhile, the false triggering is avoided.

In order to prevent the temperature of the electronic cigarette driving chip from being too high, the electronic cigarette driving chip further comprises a temperature control circuit 15 connected with the logic function circuit and used for controlling the temperature of the electronic cigarette driving chip. The temperature control circuit can also be realized by controlling the output, for example, when the temperature is detected to be overhigh, the duty ratio of the output is adjusted by the PWM circuit, the output is reduced, and even the output is directly cut off.

In order to protect the chip and prevent the chip from being burnt due to overlarge current, the electronic cigarette driving chip further comprises an overcurrent protection circuit 16 which is connected with the logic function circuit and used for entering a standby mode when the output voltage exceeds a preset voltage.

In addition, the electronic cigarette driving chip further comprises a charging circuit 17 connected with the logic function circuit. The charging circuit monitors the battery voltage through an internal comparison circuit, performs trickle charging mode when charging is started, and switches to the constant-voltage charging mode within a very short time when the voltage reaches a set threshold value.

In order to make the user intuitively judge the working state of the electronic cigarette, the electronic cigarette driving chip further comprises an LED control circuit 18 which is connected with the logic function circuit and controls the LED to be turned on, turned off or flickered according to the working state of the electronic cigarette.

In order to adjust the working state of the chip, the electronic cigarette driving chip further includes a One Time Programmable (OTP) storage circuit 19 connected to the logic function circuit, where the OTP storage circuit includes a voltage output circuit, a polysilicon fuse (poly fuse), and a fuse control fet. Wherein:

one end of the voltage output circuit is connected with a power supply;

the polycrystalline silicon fuse wire is connected between the power supply and the voltage output circuit in series;

the grid electrode of the fusing control field effect transistor is connected with the logic function circuit, the drain electrode is connected with the joint of the polycrystalline silicon fuse wire and the voltage output circuit, and the source electrode is grounded.

When the chip is used, the set value can be transmitted to the logic function circuit according to the IIC communication protocol, the logic function control circuit sends data to the polysilicon fuse wire of the corresponding address of the one-time programmable storage circuit, and the on-off state of the field effect switch is controlled through the polysilicon fuse wire, so that the working state of the chip is adjusted.

Through the one-time programmable storage circuit, a user can set charging voltage, charging current, an LED flashing mode and trigger voltage for entering a protection mode according to the requirement of the user.

In this embodiment, the voltage output circuit includes a first fet M1, a second fet M2, a third fet M3, a fourth fet M4, a fifth fet M5, a sixth fet M6, a seventh fet M7, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The polysilicon fuses include a first polysilicon fuse P1 and a second polysilicon fuse P2. The fusing control field effect transistor comprises a first fusing control field effect transistor M8 and a second fusing control field effect transistor M9.

The first polysilicon fuse P1 and the second polysilicon fuse P2 are respectively connected between a power supply VDD and the sources of the first field effect transistor M1 and the second field effect transistor M2, in this embodiment, a seventh field effect transistor M7 is connected between the first polysilicon fuse P1 and the power supply VDD and between the second polysilicon fuse P2 and the power supply VDD, and a fourth resistor R4 is connected to the gate of the seventh field effect transistor M7. The grids of the first field-effect tube M1 and the second field-effect tube M2 are connected together, the drains of the first field-effect tube M1 and the second field-effect tube M2 are respectively connected with the drains of the third field-effect tube M3 and the fourth field-effect tube M4, the grids of the third field-effect tube M3 and the fourth field-effect tube M4 are connected together, and the drains are connected together. The gates of the fifth field-effect tube M5 and the sixth field-effect tube M6 are respectively connected with the drains of the first field-effect tube M1 and the second field-effect tube M2, the first resistor R1 is connected in parallel between the drain and the source of the fifth field-effect tube M5, the second resistor R2 and the third resistor R3 are connected in parallel between the drain and the source of the sixth field-effect tube M6, the input end Vin is connected with the drain of the fifth field-effect tube M5, and the output end Vout is connected with the source of the sixth field-effect tube M6.

The drains of the first fusing control field effect transistor M8 and the second fusing control field effect transistor M9 are respectively connected with the first polysilicon fuse wire P1 and the second polysilicon fuse wire P2, the source is grounded, the grid is connected with the logic function circuit, the control signal output by the logic function circuit controls whether the first fusing control field effect transistor M8 and the second fusing control field effect transistor M9 are conducted or not, when the first fusing control field effect transistor M8 or the second fusing control field effect transistor M9 are conducted, the corresponding first polysilicon fuse wire P1 or the second polysilicon fuse wire P2 is fused, so that the connection between a power supply and a voltage output circuit is cut off, and the output is influenced.

According to the invention, the polycrystalline silicon fuse wire and the fusing control field effect tube are arranged, and the logic function control circuit is used for controlling the fusing control field effect tube to be switched on and off so as to realize the switching on and off of the corresponding polycrystalline silicon fuse wire, so that the voltage output circuit is adjusted, and as some polycrystalline silicon fuse wires are fused, the polycrystalline silicon fuse wire is not easy to be modified again after being adjusted to a state required by a user, and the experience of the user is better.

The electronic cigarette driving circuit can be used for an electronic cigarette which is provided with the electronic cigarette driving circuit.

Referring to fig. 4, when the electronic cigarette is applied to an electronic cigarette, in order to further prevent false triggering, the electronic cigarette further includes a body 8 and a human body infrared sensor 9. The human body infrared sensor is arranged on the body and sends out a wake-up signal after detecting a human body; the logic function circuit is connected with the human body infrared sensor, is in a standby state in a normal state and recovers to a normal working state after receiving the wake-up signal.

The body 8 comprises a holding part 81 and a suction nozzle 82 arranged at the upper end of the holding part, and the human body infrared sensor can be arranged on the suction nozzle 82 or the holding part 81, or on both the suction nozzle and the holding part. At the moment, the electronic cigarette can be opened only by people, and the electronic cigarette is effectively prevented from being started by mistake due to airflow or vibration in the environment.

The invention has the following characteristics:

1. the driving MOS tube is separated from the chip, and the performance of the external driving MOS tube is stronger than that of the integrated internal MOS tube. The design of the driving MOS tube is not limited by a chip, the area of the driving MOS tube can be expanded according to requirements during design, and the output power is enhanced. The driving MOS tube is arranged externally, so that the driving device has strong driving capability and high output power.

2. After integration, the circuit consistency is better than that of discrete components, and the individual difference of the memory devices such as POLY FUSE and the like arranged inside the integrated circuit can be corrected conveniently, so that the consistency problem is further improved, the yield is improved, and the production cost is reduced.

3. The chip is charged in a trickle charging mode and a constant-voltage charging mode, the charging is efficient and safe, the charging voltage can be set independently, the battery is not damaged due to overcharging, and the user is not required to charge frequently due to insufficient charging.

4. The internal working state that has multiple protection circuit monitoring chip always, when operating voltage is unusual, protection circuit can respond with very fast speed, and control chip gets into standby state, ensures that the chip can not damage, also can the steady operation after guaranteeing that the chip works for a long time again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.