CN110250573A - A kind of novel electronic cigarette control system - Google Patents
A kind of novel electronic cigarette control system Download PDFInfo
- Publication number
- CN110250573A CN110250573A CN201910423807.9A CN201910423807A CN110250573A CN 110250573 A CN110250573 A CN 110250573A CN 201910423807 A CN201910423807 A CN 201910423807A CN 110250573 A CN110250573 A CN 110250573A
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- China
- Prior art keywords
- switch
- control module
- power supply
- nmos tube
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims abstract description 33
- 239000004065 semiconductor Substances 0.000 claims abstract description 22
- 230000000391 smoking effect Effects 0.000 claims abstract description 19
- 238000002955 isolation Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- 238000012827 research and development Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- A24F47/002—
Abstract
The present invention provides a kind of novel electronic cigarette control systems, in user's smoking, gas flow transducer SW closure is so that the VDD of switch control is connected with SN, driving metal-oxide-semiconductor Q1 increases the voltage value at the end GATE of MCU, to which MCU starts to execute nebulisation operation, simultaneously because boostrap circuit can continue to be switch control module, gas flow transducer SW and metal-oxide-semiconductor power supply there are capacitor C1, Logic control module cuts the smoking movement of user, 1kHz is used, the impulse wave that duty ratio is 99% is modulated.Bootstrap capacitor in circuit is changed to the one thousandth of existing general capacity by the present invention, both the production cost of system had been reduced, the cloth line pressure of circuit can be alleviated simultaneously, this circuit is while realizing perfect circuit function simultaneously, very little is changed to available circuit, many circuit modules reduce the research and development cost of project without redesigning.
Description
Technical field
The present invention relates to electronic field, especially a kind of electronic cigarette control system.
Background technique
The design of electronic cigarette achieves rapid progress, at this stage electronic cigarette switch control by continuously improving and innovating
With the circuit of MCU as shown in Figure 1, by way of introducing bootstrap capacitor, in user's smoking gas flow transducer SW be closed so that
The VDD of switch control is connected with SN, and driving metal-oxide-semiconductor Q1 increases the voltage value at the end GATE of MCU, so that MCU starts to execute
Nebulisation operation, simultaneously because boostrap circuit there are capacitor C1 can continue be switch control module, gas flow transducer SW with
And metal-oxide-semiconductor power supply, to maintain the normal work of whole system.Such design scheme had both made the switching control section of circuit
Line between the part MCU becomes two lines from three lines of conditional electronic cigarette, while the circuit that can be reduced in switch control is set
Meter is not necessarily to constant-current source, and it is only necessary to add a switch between VDD and SN, while the end the GATE detection of MCU is voltage
The presence or absence of signal, the requirement for MCU are lower.
But it is this design still have a serious problem, when user carries out smoking movement, bootstrap capacitor C1 by
In need simultaneously to air-flow detection switch SW, switch control module and metal-oxide-semiconductor Q1 power supply, by calculate and actual verification it is found that
It needs to be more than that the capacitor of 22uF could maintain the turn-on time of 5S or more, the design and size of electronic cigarette, which determine, is not available electricity
Capacitor is solved, and the ceramic condenser of capacitance in this way is common is encapsulated as 0805 or bigger, and price is higher, therefore pcb board design and produced
Product cost control is problematic in that.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of novel electronic cigarette control system, existing inheriting
On the basis of electronic cigarette control circuit advantage, the smoking movement of user is cut, that is, uses 1kHz, duty ratio is 99%
Impulse wave be modulated, therefore the bootstrap capacitor in circuit can be changed to that 22nF is even lower by 22uF, this capacitance
Capacitor price is low, and package dimension is small, and reduce circuit area when design produces reduces production cost simultaneously.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of novel electronic cigarette control system, including switch control module, Logic control module, MCU module, reversely every
From module and peripheral component, peripheral component includes DC power supply, fixed value resistance R1, NMOS tube Q1, SW and nF grades of switch
Ceramic condenser C1；The DC power supply is directly coupled to the two sides VDD and GND of MCU module, powers for MCU module；DC power supply
Cathode is connected respectively to the source at the end GATE of MCU, the GND of switch control module and NMOS tube Q1 after fixed value resistance R1
End；The drain terminal of the anode connection NMOS tube Q1 of DC power supply, and pass through the VDD that reverse isolation module is connected to switch control module
End；The switch control module built-in switch connection VDD and Logic control module, the switch and switch of the Logic control module
The pin SN of control module is connected, the control by SW on off operating mode；The pin SN of switch control module passes through logic control mould
Block is connected to the grid end of metal-oxide-semiconductor Q1；Switch SW is air-flow detection switch, and default switch is opened, switchs and close when there is air-flow to pass through
It closes；Switch in switch control module, which is defaulted, to be opened, and is connected between VDD and SN when SW closure；The Logic control module connects
It connects between switch control module and NMOS tube Q1, in user's smoking, telecommunications of the Logic control module to smoking movement generation
It number is cut, using 1kHz, the pulse wave signal that duty ratio is 99% is modulated NMOS tube.
After the novel electronic cigarette control system powers on, DC power supply is the power supply of entire circuit, electronic cigarette control system
Into standby mode, SW default is opened at this time, VDD and the SN foot inside switch control it is separated, metal-oxide-semiconductor Q1 is in disconnection shape
State, DC power supply, which connects, to charge at the both ends capacitor C1 for it, and the end the GATE potential of MCU is zero.
When user smokes, SW comes into force, and closing the switch in switch control module links together VDD and SN,
SN current potential is raised through logic control driving NMOS tube Q1, and at this time after NMOS tube Q1 closure, the anode of DC power supply is directly connected to
The high potential end voltage at the low potential end of fixed value resistance R1, the GND of switch control and capacitor C1, capacitor C1 further increases,
It powers for switch control module, while the potential of the grid at the end NMOS is increased to twice of direct current power source voltage, is higher than source voltage,
Continue to drive NMOS tube Q1 work.
During the work time, Logic control module persistently carries out the switch control of circuit, and the primary smoking of user is acted
The electric signal of generation carries out thousands of cuttings, i.e., controls the logical of NMOS tube Q1 by the pulse wave signal that duty ratio is 99%
Disconnected, in NMOS tube Q1 shutdown, power supply is C1 charging.
The invention has the beneficial effects that the bootstrap capacitor in circuit can be replaced by above-mentioned connection and working method
For the one thousandth of existing general capacity, the production cost of system was both reduced, while the cloth line pressure of circuit can be alleviated, together
When this circuit while realizing perfect circuit function, very little is changed to available circuit, many circuit modules without setting again
Meter, reduces the research and development cost of project.
Detailed description of the invention
Fig. 1 is the line schematic diagram of existing electronic cigarette switch control and MCU.
Fig. 2 is the line schematic diagram of electronic cigarette switch control of the present invention and MCU, is wherein IC internal structure in dotted line frame.
Fig. 3 is the switching waveform figure of metal-oxide-semiconductor when existing electronic cigarette works.
Fig. 4 is capacitance voltage curves when existing electronic cigarette works.
Fig. 5 is metal-oxide-semiconductor switching waveform figure when electronic cigarette of the present invention works.
Fig. 6 is capacitance voltage curves when electronic cigarette of the present invention works.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The present invention designs the line between one kind novel switch control and MCU by the design of introducing boostrap circuit
Control mode so that the capacitance of bootstrap capacitor needed for available circuit be reduced to the prior art needed for one thousandth.
A kind of novel electronic cigarette control system, as shown in Fig. 2, including switch control module, Logic control module, MCU
Module, reverse isolation module and corresponding peripheral component, peripheral component include DC power supply, fixed value resistance R1, NMOS
SW and nF grades of pipe Q1, switch ceramic condenser C1；The DC power supply is directly coupled to the two sides VDD and GND of MCU module, is MCU
Module for power supply；The cathode of DC power supply is connected respectively to the end GATE of MCU, switch control module after fixed value resistance R1
The source of GND and NMOS tube Q1；The drain terminal of the anode connection NMOS tube Q1 of DC power supply, and connected by reverse isolation module
To the vdd terminal of switch control module；The switch control module built-in switch connection VDD and Logic control module, the logic
The switch of control module is connected with the pin SN of switch control module, the control by SW on off operating mode；Switch control module
Pin SN is connected to the grid end of metal-oxide-semiconductor Q1 by Logic control module；Switch SW is air-flow detection switch, and default switch is opened,
It is closed the switch when there is air-flow to pass through；Switch in switch control module, which is defaulted, to be opened, and is connected between VDD and SN when SW closure
It is logical；The Logic control module is connected between switch control module and NMOS tube Q1, in user's smoking, Logic control module
The electric signal generated to smoking movement is cut, and using 1kHz, the pulse wave signal that duty ratio is 99% carries out NMOS tube
Modulation, to make it possible the use of nF grades of ceramic condenser C1；NF grades of ceramic condenser C1 are bootstrap capacitor, and C1 is connected to switch
Between the VDD and GND of control module, power in circuit work for switch control module.
After the novel electronic cigarette control system powers on, DC power supply is the power supply of entire circuit, electronic cigarette control system
Into standby mode, SW default is opened at this time, VDD and the SN foot inside switch control it is separated, metal-oxide-semiconductor Q1 is in disconnection shape
State, DC power supply, which connects, to charge at the both ends capacitor C1 for it, and due to not having current loop, fixed value resistance R1 does not generate pressure drop, therefore
The end the GATE potential of MCU is zero.
When user smokes, SW comes into force, and closing the switch in switch control module links together VDD and SN,
SN current potential is raised through logic control driving NMOS tube Q1, and at this time after NMOS tube Q1 closure, the anode of DC power supply is directly connected to
The low potential end of fixed value resistance R1, the GND of switch control and capacitor C1, due to the presence of reverse isolation module, capacitor C1's
High potential end voltage further increases, and powers for switch control module, while the potential of the grid at the end NMOS is increased to direct current
Twice of source voltage is higher than source voltage, continues to drive NMOS tube Q1 work.
During the work time, Logic control module persistently carries out the switch control of circuit, and the primary smoking of user is acted
The electric signal of generation carries out thousands of cuttings, i.e., controls the logical of NMOS tube Q1 by the pulse wave signal that duty ratio is 99%
Disconnected, as shown in Fig. 5, in NMOS tube Q1 shutdown, power supply is C1 charging, is then normally carried out atomization in the time of Q1 conducting.And nF
The capacitor of grade can complete charging within 1 ‰ times that Q1 is turned off；Simultaneously because being carried out to primary smoking movement (about 3~5s)
Thousand segmentations, therefore nF grade of capacitor can stable be examining for NMOS tube Q1 and circuit within 3~5ms time of circuit conducting
The power supply of official's control module.
As shown in Fig. 2, entire circuit include power supply P1, switch control module, MCU, reverse isolation module, capacitor C1,
NMOS tube Q1, logic control, switch SW, fixed value resistance R1 and corresponding connecting line.Wherein power supply Q1 is DC power supply, in electricity
It is usually rechargeable lithium battery in the practical application of sub- cigarette；The main function of reverse isolation module is that electric current is allowed to be flowed to by power supply
The vdd terminal of switch control, but can not flow backwards.Switch SW is air-flow detection switch, and default switch is opened, when the gas for being more than threshold value
Flow through out-of-date close the switch.Another switch, is connected between VDD and SN built in switch control module, for passing through logic control
The switch of metal-oxide-semiconductor Q1 is driven, wherein logic control sends preset high duty ratio impulse wave during user smokes.
The specific connection type of circuit are as follows: the anode of DC power supply P1 directly connects in the vdd terminal of MCU module, metal-oxide-semiconductor Q1
Drain terminal, while process reverse isolation module is followed by vdd terminal and the one end capacitor C1 in switch control module；The cathode of power supply P1 is straight
It connects at the end GND of MCU, while being followed by by fixed value resistance R1 in the end GATE of MCU, the source of metal-oxide-semiconductor Q1, switch control mould
The end GND of block and the other side of capacitor C1；Switch SW is connected with switch control module；The SN foot of switch control passes through logic control
System is connected to the grid of metal-oxide-semiconductor Q1.For convenience of description, it is labelled with voltage mark point at three in figure, is denoted as respectively 1., 2., 3..
After the completion of circuit connection, DC power supply P1 is the power supply of entire circuit system, and note supply voltage value is V, at this time MCU
VDD and the direct-connected power positive cathode of GND, into standby mode；Due to acting at this time without user's smoking, SW default is disconnected, switch
Switch inside control disconnects, and VDD is connect with SN, i.e., SN potential is low, therefore Q1 is opened.It is fixed due to there is no electric current process
Pressure drop on value resistance R1 is zero, thus three in figure at the voltage of mark point be respectively as follows: 1.=V, 2.=V, 3.=0.Due to MCU
GATE terminal voltage value be equal to and 3. locate voltage value, therefore nebulisation operation is not carried out in MCU at this time.
When user starts smoking, the air-flow of generation is closed switch SW, at this time opening built in switch control module
It closes and closes, VDD is connected with SN, and SN potential increases, and metal-oxide-semiconductor is driven, so that Q1 is closed.The potential 3. located at this time is equal to power supply P1's
The GATE terminal voltage value of voltage value V, i.e. MCU become V, and MCU starts to drive electronic cigarette atomizing when detecting the voltage value.Electricity simultaneously
The potential for holding the downside of C1 becomes V, and since the voltage value of capacitor cannot be mutated, the potential on the upside of capacitor C can rise to 2*
V, i.e., the potential 2. located become 2*V, and due to the presence of reverse isolation, the discharge path on capacitor C1 can only pass through switch control mould
Block, the current potential of SN further increases at this time, still higher than the current potential of metal-oxide-semiconductor source level, therefore SN can continue to drive Q1.It patrols at this time
The impulse wave of the lasting preset high duty ratio of generation of control is collected, such as frequency is 1kHz, the impulse wave that duty ratio is 95%.?
Logic control is equivalent to access when signal is high, and SN foot position is allowed to drive metal-oxide-semiconductor Q1, and signal is equivalent to open circuit when being low, SN without
Method drives Q1, and DC power supply is that capacitor C is recharged at this time.
When user terminates smoking movement, switch SW is opened, and the switch built in switch control module reopens, SN electricity
Gesture becomes 0, no longer driving metal-oxide-semiconductor, and the state of each point becomes the state before starting smoking again at this time, and MCU no longer drives atomizer
Work, system reenter standby mode.
Fig. 3 and Fig. 5 shows respectively metal-oxide-semiconductor switching waveform when electronic cigarette and electronic cigarette of the present invention work, which is
The actual output situation of electronic cigarette can be shown, Fig. 4 and Fig. 6 are the capacitance voltage curves of two kinds of different designs, due to the present invention
The pulse wave signal that logic control is sent mend capacitor can in one second electricity thousands of times, therefore use minimum capacitor
Guarantee the power supply needed in user's use process, meanwhile, higher duty cycle signals make the sense of user in use
By almost the same with scheme before, the switching speed of the frequency is much larger than the range of human-perceivable, and user can not perceive
The switch of system, to sum up, capacitance needed for the present invention significantly reduces circuit on it ensure that the identical usage experience of user.
Claims (1)
1. a kind of novel electronic cigarette control system, it is characterised in that:
The novel electronic cigarette control system, including switch control module, Logic control module, MCU module, reverse isolation mould
Block and peripheral component, peripheral component include SW and nF grades of DC power supply, fixed value resistance R1, NMOS tube Q1, switch ceramics
Capacitor C1；The DC power supply is directly coupled to the two sides VDD and GND of MCU module, powers for MCU module；The cathode of DC power supply
The source at the end GATE of MCU, the GND of switch control module and NMOS tube Q1 is connected respectively to after fixed value resistance R1；Directly
The drain terminal of the anode connection NMOS tube Q1 in galvanic electricity source, and pass through the vdd terminal that reverse isolation module is connected to switch control module；Institute
State switch control module built-in switch connection VDD and Logic control module, the switch and switch control of the Logic control module
The pin SN of module is connected, the control by SW on off operating mode；The pin SN of switch control module connects by Logic control module
It is connected to the grid end of metal-oxide-semiconductor Q1；Switch SW is air-flow detection switch, and default switch is opened, closed the switch when there is air-flow to pass through；It opens
The switch closed in control module defaults opening, is connected between VDD and SN when SW closure；The Logic control module is connected to out
It closes between control module and NMOS tube Q1, in user's smoking, the electric signal that Logic control module generates smoking movement is carried out
Cutting, using 1kHz, the pulse wave signal that duty ratio is 99% is modulated NMOS tube.
After the novel electronic cigarette control system powers on, DC power supply is the power supply of entire circuit, and electronic cigarette control system enters
Standby mode, SW default is opened at this time, the VDD and SN foot inside switch control it is separated, metal-oxide-semiconductor Q1 is in an off state,
DC power supply, which connects, to charge at the both ends capacitor C1 for it, and the end the GATE potential of MCU is zero.
When user smokes, SW comes into force, and closing the switch in switch control module links together VDD and SN, SN electricity
Position is raised through logic control driving NMOS tube Q1, and at this time after NMOS tube Q1 closure, the anode of DC power supply is directly connected to definite value
The high potential end voltage at the low potential end of resistance R1, the GND of switch control and capacitor C1, capacitor C1 further increases, to open
Control module power supply is closed, while the potential of the grid at the end NMOS is increased to twice of direct current power source voltage, be higher than source voltage, continued
Drive NMOS tube Q1 work.
During the work time, Logic control module persistently carries out the switch control of circuit, and the primary smoking of user is acted and is generated
Electric signal carry out thousands of time cuttings, i.e., the on-off of NMOS tube Q1 is controlled by the pulse wave signal that duty ratio is 99%,
Power supply is C1 charging when NMOS tube Q1 is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423807.9A CN110250573B (en) | 2019-05-21 | 2019-05-21 | Novel electronic cigarette control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423807.9A CN110250573B (en) | 2019-05-21 | 2019-05-21 | Novel electronic cigarette control system |
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| Publication Number | Publication Date |
|---|---|
| CN110250573A true CN110250573A (en) | 2019-09-20 |
| CN110250573B CN110250573B (en) | 2024-02-23 |
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|---|---|---|---|
| CN201910423807.9A Active CN110250573B (en) | 2019-05-21 | 2019-05-21 | Novel electronic cigarette control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677960A (en) * | 2019-11-05 | 2020-01-10 | 西安拓尔微电子有限责任公司 | Flash device quick start circuit and control method |
| CN117277464A (en) * | 2022-12-30 | 2023-12-22 | 无锡市稳先微电子有限公司 | Battery protection circuit, battery pack, electronic device, and mode control method |
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| CN109393574A (en) * | 2018-11-20 | 2019-03-01 | 杭州拓尔微电子有限公司 | A kind of new electronic cigarette control system |
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| CN102510605A (en) * | 2011-10-17 | 2012-06-20 | 潘永雄 | Novel LED (light emitting diode) driving circuit |
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| CN110250573B (en) | 2024-02-23 |
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Address after: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Applicant after: Tuoer Microelectronics Co.,Ltd. Address before: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Applicant before: Xi'an Tuoer Microelectronics Co.,Ltd. Address after: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Applicant after: Xi'an Tuoer Microelectronics Co.,Ltd. Address before: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Applicant before: XI'AN TUOER MICROELECTRONICS Co.,Ltd. |
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