CN104770884A - Electronic cigarette control chip and electronic cigarette - Google Patents
Electronic cigarette control chip and electronic cigarette Download PDFInfo
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- CN104770884A CN104770884A CN201510077393.0A CN201510077393A CN104770884A CN 104770884 A CN104770884 A CN 104770884A CN 201510077393 A CN201510077393 A CN 201510077393A CN 104770884 A CN104770884 A CN 104770884A
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- oxide
- semiconductor
- metal
- electronic cigarette
- control chip
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- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 194
- 239000004065 semiconductor Substances 0.000 claims description 207
- 235000019504 cigarettes Nutrition 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 36
- 229910052744 lithium Inorganic materials 0.000 abstract description 36
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 241000208125 Nicotiana Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 2
- 229960002715 nicotine Drugs 0.000 description 2
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A24F47/008—
-
- H02J7/0091—
Abstract
The invention discloses an electronic cigarette control chip and an electronic cigarette. An internal oscillation and voltage reference module is started up when a working state control module detects that an SW terminal of the electronic cigarette control chip is started or the voltage of an OUT terminal is higher than the voltage of a VDD terminal of the electronic cigarette control chip, so that the electronic cigarette control chip starts to work; then, the working state control module detects whether the voltage of the OUT terminal is higher than the voltage of the VDD terminal, if yes, the electronic cigarette control chip is judged in the working mode, and if no, the electronic cigarette control chip is judged in the charging mode, so that different working states of the electronic cigarette control chip can be accurately detected, and the working modes are controlled according to the working states; and when the temperature of the electronic cigarette control chip is higher than the internally set temperature point, an immediate stop is required to prevent a lithium battery from over temperature.
Description
Technical field
The present invention relates to electronic cigarette technical field, particularly a kind of electronic cigarette control chip and electronic cigarette.
Background technology
Electronic cigarette is a novel cigarette substitute products, and it supplies energy to atomizer by inner lithium battery, allows atomizer heat tobacco tar (containing nicotine in tobacco tar) and tobacco tar is atomized.User obtains the nicotine in similar cigarette after the smog sucking electronic cigarette atomizing, the harmful substance such as tar, carbon monoxide produced after simultaneously avoiding sucking cigarette combustion.Electronic cigarette control chip can carry out management of charging and discharging to electronic cigarette inside lithium battery, drives atomizer to heat, meets the smoking experience of smoker, guarantee healthy.
In present electronic cigarette, usually can, because the charging current of electronic cigarette control chip is too low or charging current is unstable, cause the charging interval of control chip to lithium battery long.And because the discharge current of electronic cigarette control chip is too low, drive atomizer underpower etc., cause amount of smoke low.
In addition, the stand-by power consumption of existing electronic cigarette control chip is higher, and due to electronic cigarette be in for a long time standby in the middle of, stand-by power consumption is accumulated for a long time, also can carry out the loss of larger electricity to the lithium battery of limited capacity.
Thus prior art need to improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of electronic cigarette control chip and electronic cigarette, the different operating state of energy detected electrons cigarette control chip, it is according to its mode of operation of working state control.
In order to achieve the above object, this invention takes following technical scheme:
A kind of electronic cigarette control chip, it comprises:
Whether the SW end for detected electrons cigarette control chip is opened, and whether the voltage of the OUT end of detected electrons cigarette control chip is greater than the working state control module of the voltage of its vdd terminal;
Open for the SW end when electronic cigarette control chip, or the internal oscillator that starts when whether being greater than the voltage of its vdd terminal of the voltage of OUT end and voltage reference module;
For controlling the charged state control module that electronic cigarette control chip is charged to external cell;
For controlling the holding state judge module of the holding state of electronic cigarette control chip;
For when electronic cigarette control chip temperature is higher than preset temperature, control the out-of-work temperature protection module of electronic cigarette control chip;
The first input end of described working state control module connects the SW end of electronic cigarette control chip, first output of described working state control module connects OUT end and the LED end of electronic cigarette control chip, second output of working state control module connects the first input end of holding state judge module, temperature protection module connects the second input of holding state judge module, the output of holding state judge module is connected the second input of working state control module and the first input end of charged state control module by internal oscillator with voltage reference module, second input of described charged state control module connects the OUT end of electronic cigarette control chip, first output of charged state control module connects the LED end of electronic cigarette control chip, second output of charged state control module connects the first input end of holding state judge module.
In described electronic cigarette control chip, described working state control module comprises working state control module and comprises the first comparator, first metal-oxide-semiconductor, first phase inverter and the second metal-oxide-semiconductor, the negative input end of described first comparator connects the vdd terminal of electronic cigarette control chip, the positive input terminal of the first comparator connects the OUT end of electronic cigarette control chip, the output of described first comparator connects the grid of the first metal-oxide-semiconductor, the source electrode of the first metal-oxide-semiconductor connects the internal electric source of electronic cigarette control chip, the drain electrode of the first metal-oxide-semiconductor connects described vdd terminal, the substrate of the first metal-oxide-semiconductor connects the grid of the second metal-oxide-semiconductor by the first phase inverter, the source electrode of the second metal-oxide-semiconductor connects the internal electric source of electronic cigarette control chip, the drain electrode of the second metal-oxide-semiconductor connects described vdd terminal.
In described electronic cigarette control chip, described first metal-oxide-semiconductor and the second metal-oxide-semiconductor are P channel MOS tube.
In described electronic cigarette control chip, described charged state control module comprises the second comparator, 3rd comparator, 3rd metal-oxide-semiconductor, 4th metal-oxide-semiconductor, 5th metal-oxide-semiconductor and resistance, drain electrode and the drain electrode of the 4th metal-oxide-semiconductor of described 3rd metal-oxide-semiconductor are all connected the OUT end of electronic cigarette control chip, the substrate of described 3rd metal-oxide-semiconductor connects the grid of the 4th metal-oxide-semiconductor, the source electrode of described 3rd metal-oxide-semiconductor connects the positive input terminal of the second comparator, the positive pole of external cell is also connected by the vdd terminal of electronic cigarette control chip, the source electrode of described 4th metal-oxide-semiconductor connects the negative input end of the second comparator and the source electrode of the 5th metal-oxide-semiconductor, the output of described second comparator connects the grid of the 5th metal-oxide-semiconductor, resistance eutral grounding is passed through in the drain electrode of the 5th metal-oxide-semiconductor, the positive input terminal of described 3rd comparator connects the internal reference voltage end of electronic cigarette control chip, the negative input end of the 3rd comparator is by described resistance eutral grounding, the output of described 3rd comparator connects the grid of the 3rd metal-oxide-semiconductor.
In described electronic cigarette control chip, described 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor are P channel MOS tube.
In described electronic cigarette control chip, described electronic cigarette control chip also comprises short-circuit detecting module, hold with the OUT of electronic cigarette control chip and be connected, described short-circuit detecting module comprises: the 6th metal-oxide-semiconductor, 7th metal-oxide-semiconductor, 8th metal-oxide-semiconductor, 9th metal-oxide-semiconductor, tenth metal-oxide-semiconductor, 11 metal-oxide-semiconductor, 12 metal-oxide-semiconductor and the second phase inverter, the grid of described 6th metal-oxide-semiconductor is connected the REFI end of electronic cigarette control chip with drain electrode, the source electrode of the 6th metal-oxide-semiconductor, the source electrode of the 7th metal-oxide-semiconductor, source electrode and the source electrode of the 9th metal-oxide-semiconductor of the 8th metal-oxide-semiconductor are all connected the in-line power end of electronic cigarette control chip, the substrate of the 6th metal-oxide-semiconductor connects the grid of the 7th metal-oxide-semiconductor, the drain electrode of the 7th metal-oxide-semiconductor connects the drain and gate of the tenth metal-oxide-semiconductor and the grid of the 11 metal-oxide-semiconductor, the substrate of described 7th metal-oxide-semiconductor connects the grid of the 8th metal-oxide-semiconductor, the drain electrode of the 8th metal-oxide-semiconductor connects the drain electrode of the 11 metal-oxide-semiconductor and the grid of the 12 metal-oxide-semiconductor, the substrate of described 8th metal-oxide-semiconductor connects the grid of the 9th metal-oxide-semiconductor, the drain electrode of described 9th metal-oxide-semiconductor connects the input of the second phase inverter and the drain electrode of the 12 metal-oxide-semiconductor, the output of the second phase inverter connects working state control module, the source electrode of the tenth metal-oxide-semiconductor and the source ground of the 12 metal-oxide-semiconductor, the source electrode of the 11 metal-oxide-semiconductor connects the OUT end of electronic cigarette control chip.
In described electronic cigarette control chip, described 6th metal-oxide-semiconductor, the 7th metal-oxide-semiconductor, the 8th metal-oxide-semiconductor and the 9th metal-oxide-semiconductor are P channel MOS tube, and the tenth metal-oxide-semiconductor, the 11 metal-oxide-semiconductor and the 12 metal-oxide-semiconductor are N-channel MOS pipe.
A kind of electronic cigarette, comprise: battery, atomizer, LED light, switch and electronic cigarette control chip described above, the vdd terminal of described electronic cigarette control chip connects the positive pole of battery, the GND end of described electronic cigarette control chip connects negative pole and the ground of battery, the SW end of described electronic cigarette control chip connects the negative pole of battery by described switch, the OUT end of described electronic cigarette control chip connects charging inlet, also by atomizer ground connection, the LED end of described electronic cigarette control chip connects the positive pole of LED light, the minus earth of described LED light.
Compared to prior art, electronic cigarette control chip provided by the invention and electronic cigarette, held by the SW of working state control module detected electrons cigarette control chip and open, or the internal oscillator that the voltage of OUT end starts when whether being greater than the voltage of its vdd terminal and voltage reference module make electronic cigarette control chip start working, then detect by working state control module the voltage whether voltage that described OUT holds be greater than its vdd terminal; If so, then judge that electronic cigarette control chip is mode of operation; If not, judge that electronic cigarette control chip is charge mode, achieve the different operating state of accurate detected electrons cigarette control chip, it is according to its mode of operation of working state control.And detecting that the temperature of electronic cigarette control chip is greater than the temperature spot of its inner setting, quitting work immediately, preventing lithium battery temperature too high.
Accompanying drawing explanation
The structured flowchart of the electronic cigarette control chip that Fig. 1 provides for the embodiment of the present invention.
The circuit diagram of working state control module in the electronic cigarette control chip that Fig. 2 provides for the embodiment of the present invention.
The circuit diagram of charged state control module in the electronic cigarette control chip that Fig. 3 provides for the embodiment of the present invention.
The circuit diagram of electronic cigarette control chip in the electronic cigarette control chip that Fig. 4 provides for the embodiment of the present invention.
The circuit diagram of the electronic cigarette that Fig. 5 provides for the embodiment of the present invention.
The flow chart of the working state control method of the electronic cigarette that Fig. 6 provides for the embodiment of the present invention.
The workflow diagram of the electronic cigarette that Fig. 7 provides for the embodiment of the present invention.
Detailed description of the invention
The invention provides a kind of electronic cigarette control chip and electronic cigarette, for making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The model of electronic cigarette control chip provided by the invention is LC6201, it comprises lithium battery anode end VDD, connects cathode of lithium battery end GND, atomizer drives and charging input end OUT, key switch SW, display driver LED these 5 ends.Wherein, when charge mode, VDD be voltage output end to lithium cell charging, OUT is that voltage input end connects external charging interface; When mode of operation, VDD be voltage input end from lithium battery input voltage, OUT is that voltage output end drives atomizer work.
After LC6201 electronic cigarette control chip starts, the voltage of real-time detection OUT end and vdd terminal: when vdd terminal voltage is greater than OUT terminal voltage, judge that electronic cigarette control chip is mode of operation, when vdd terminal voltage is less than OUT terminal voltage, judge that electronic cigarette control chip is charge mode.
Under charge mode, first LC6201 electronic cigarette control chip can judge the voltage of lithium battery, because lithium battery needs corresponding electric current to charge under different voltage, unaffected to ensure the service life of lithium battery.Then use current control circuit accurately to control the charging current exported, timer internal is opened simultaneously, and after charging reaches certain hour, positive closing charging, avoids lithium battery overcharge.
In the operational mode, LC6201 electronic cigarette control chip has two states, i.e. holding state and duty.When external switch invalidating signal not detected, electronic cigarette control chip is in holding state, and electronic cigarette control chip can close internal oscillator and internal reference voltage, now the power consumption of electronic cigarette control chip and small in being less than 1 milliwatt.After detecting that external switch signal effectively, electronic cigarette control chip enters duty, first internal oscillator and internal reference voltage can be opened, detect whether lithium battery voltage is too low is not suitable for work again, when lithium battery is pressed in working range, so drive atomizer work and detect atomizer whether short circuit, timer is opened and being prevented long-time electric discharge from impacting lithium battery simultaneously.
When electronic cigarette control chip starts, no matter be in charge mode or mode of operation, all can the temperature of detected electrons cigarette control chip, when detecting that temperature is greater than the temperature spot of inner setting, quitting work immediately, preventing lithium battery temperature too high.
Refer to Fig. 1, electronic cigarette control chip provided by the invention comprises: working state control module, internal oscillator and voltage reference module, charged state control module, holding state judge module and temperature protection module.The first input end of described working state control module connects the SW end of electronic cigarette control chip, first output of described working state control module connects OUT end and the LED end of electronic cigarette control chip, second output of working state control module connects the first input end of holding state judge module, temperature protection module connects the second input of holding state judge module, the output of holding state judge module is connected the second input of working state control module and the first input end of charged state control module by internal oscillator with voltage reference module, second input of described charged state control module connects the OUT end of electronic cigarette control chip, first output of charged state control module connects the LED end of electronic cigarette control chip, second output of charged state control module connects the first input end of holding state judge module.
Wherein, whether the SW end that described working state control module is used for detected electrons cigarette control chip is opened, and whether the voltage of the OUT end of detected electrons cigarette control chip is greater than the voltage of its vdd terminal.When the SW end of electronic cigarette control chip is opened, or start internal oscillator and voltage reference module when whether the voltage of OUT end is greater than the voltage of its vdd terminal.
Described charged state control module controls electronic cigarette control chip and charges to external cell, and controls the size of charging voltage.Holding state judge module is for controlling the holding state of electronic cigarette control chip.When temperature protection module electronic cigarette control chip temperature is higher than preset temperature, controls electronic cigarette control chip and quit work, prevent lithium battery temperature too high.
The present embodiment is held by the SW of working state control module detected electrons cigarette control chip and is opened, or the internal oscillator that the voltage of OUT end starts when whether being greater than the voltage of its vdd terminal and voltage reference module make electronic cigarette control chip start working, then detect by working state control module the voltage whether voltage that described OUT holds be greater than its vdd terminal; If so, then judge that electronic cigarette control chip is mode of operation; If not, judge that electronic cigarette control chip is charge mode, achieve the different operating state of accurate detected electrons cigarette control chip, it is according to its mode of operation of working state control.And detecting that the temperature of electronic cigarette control chip is greater than the temperature spot of its inner setting, quitting work immediately, preventing lithium battery temperature too high.
See also Fig. 1 and Fig. 2, described working state control module comprises working state control module and comprises the first comparator A1, first metal-oxide-semiconductor P1, first phase inverter and the second metal-oxide-semiconductor P2, the negative input end of described first comparator A1 connects the vdd terminal of electronic cigarette control chip, the positive input terminal of the first comparator A1 connects the OUT end of electronic cigarette control chip, the output of described first comparator A1 connects the grid of the first metal-oxide-semiconductor P1, the source electrode of the first metal-oxide-semiconductor P1 connects the internal electric source of electronic cigarette control chip, the drain electrode of the first metal-oxide-semiconductor P1 connects described vdd terminal, the substrate of the first metal-oxide-semiconductor P1 connects the grid of the second metal-oxide-semiconductor P2 by the first phase inverter, the source electrode of the second metal-oxide-semiconductor P2 connects the internal electric source of electronic cigarette control chip, the drain electrode of the second metal-oxide-semiconductor P2 connects described vdd terminal.
Described first metal-oxide-semiconductor P1 and the second metal-oxide-semiconductor P2 is P channel MOS tube.The present embodiment uses the first comparator A1 to judge the OUT end of electronic cigarette control chip and the voltage of vdd terminal, and when vdd terminal voltage is higher than the first metal-oxide-semiconductor P1 conducting during OUT terminal voltage, electronic cigarette control chip internal electric source is connected with VDD; When OUT terminal voltage is higher than the second metal-oxide-semiconductor P2 conducting during vdd terminal voltage, electronic cigarette control chip internal electric source is connected with OUT, thus ensureing when vdd voltage is 0V, after electronic cigarette control chip connects upper charger, electronic cigarette control chip can use OUT end to carry out charging operations as power supply.
Refer to Fig. 3, described charged state control module comprises the second comparator A3, 3rd comparator A4, 3rd metal-oxide-semiconductor P3, 4th metal-oxide-semiconductor P4, 5th metal-oxide-semiconductor P5 and resistance R1, drain electrode and the drain electrode of the 4th metal-oxide-semiconductor P4 of described 3rd metal-oxide-semiconductor P3 are all connected the OUT end of electronic cigarette control chip, the substrate of described 3rd metal-oxide-semiconductor P3 connects the grid of the 4th metal-oxide-semiconductor P4, the source electrode of described 3rd metal-oxide-semiconductor P3 connects the positive input terminal of the second comparator A3, the positive pole of external cell is also connected by the vdd terminal of electronic cigarette control chip, the source electrode of described 4th metal-oxide-semiconductor P4 connects the negative input end of the second comparator A3 and the source electrode of the 5th metal-oxide-semiconductor P5, the output of described second comparator A3 connects the grid of the 5th metal-oxide-semiconductor P5, the drain electrode of the 5th metal-oxide-semiconductor P5 is by resistance R1 ground connection, the positive input terminal of described 3rd comparator A4 connects the internal reference voltage end of electronic cigarette control chip, the negative input end of the 3rd comparator A4 is by described resistance R1 ground connection, the output of described 3rd comparator A4 connects the grid of the 3rd metal-oxide-semiconductor P3.
Described 3rd metal-oxide-semiconductor P3, the 4th metal-oxide-semiconductor P4, the 5th metal-oxide-semiconductor P5 are P channel MOS tube, when its grid is low level, and metal-oxide-semiconductor conducting.Owing to carrying out current detecting at charging section series resistance R1 during large current charge, the loss of electric current can be caused, therefore the image current method shown in Fig. 3 is adopted to detect charging current, by the equal current proportion type minifier picture of the 4th metal-oxide-semiconductor P4 to the 3rd metal-oxide-semiconductor P3, IP3=N*IP4 (N be greater than 1 number).When internal resistance difference due to outside connection lithium battery is different with lithium battery voltage, internal resistance is also different, the 5th metal-oxide-semiconductor P5 is used to carry out mirror image to lithium battery internal resistance, electronic cigarette control chip internal mode is made to draw up a charging current similar with lithium battery, a voltage is created as current flowing resistance R1, voltage and internal reference voltage use the 3rd comparator A4 to compare, thus ensure to the electric current of lithium cell charging to be steady state value.If need the size adjusting charging current, only need the resistance of adjusting resistance R1.
Preferably, electronic cigarette control chip of the present invention also comprises short-circuit detecting module, holds be connected with the OUT of electronic cigarette control chip.Refer to Fig. 4, described short-circuit detecting module comprises: the 6th metal-oxide-semiconductor P6, the 7th metal-oxide-semiconductor P7, the 8th metal-oxide-semiconductor P8, the 9th metal-oxide-semiconductor P9, the tenth metal-oxide-semiconductor N1, the 11 metal-oxide-semiconductor N2, the 12 metal-oxide-semiconductor N3 and the second phase inverter A5.
In the present embodiment, described 6th metal-oxide-semiconductor P6, the 7th metal-oxide-semiconductor P7, the 8th metal-oxide-semiconductor P8 and the 9th metal-oxide-semiconductor P9 are P channel MOS tube, and the tenth metal-oxide-semiconductor N1, the 11 metal-oxide-semiconductor N2 and the 12 metal-oxide-semiconductor N3 are N-channel MOS pipe.The grid of described 6th metal-oxide-semiconductor P6 is connected the REFI end of electronic cigarette control chip with drain electrode, the source electrode of the 6th metal-oxide-semiconductor P6, the source electrode of the 7th metal-oxide-semiconductor P7, source electrode and the source electrode of the 9th metal-oxide-semiconductor P9 of the 8th metal-oxide-semiconductor P8 are all connected the in-line power end of electronic cigarette control chip, the substrate of the 6th metal-oxide-semiconductor P6 connects the grid of the 7th metal-oxide-semiconductor P7, the drain electrode of the 7th metal-oxide-semiconductor P7 connects the drain and gate of the tenth metal-oxide-semiconductor N1 and the grid of the 11 metal-oxide-semiconductor N2, the substrate of described 7th metal-oxide-semiconductor P7 connects the grid of the 8th metal-oxide-semiconductor P8, the drain electrode of the 8th metal-oxide-semiconductor P8 connects the drain electrode of the 11 metal-oxide-semiconductor N2 and the grid of the 12 metal-oxide-semiconductor N3, the substrate of described 8th metal-oxide-semiconductor P8 connects the grid of the 9th metal-oxide-semiconductor P9, the drain electrode of described 9th metal-oxide-semiconductor P9 connects the input of the second phase inverter A5 and the drain electrode of the 12 metal-oxide-semiconductor N3, the output of the second phase inverter A5 connects working state control module, the source electrode of the tenth metal-oxide-semiconductor N1 and the source ground of the 12 metal-oxide-semiconductor N3, the source electrode of the 11 metal-oxide-semiconductor N2 connects the OUT end of electronic cigarette control chip.
When the present invention avoids atomizer short circuit, electronic cigarette control chip work causes its internal components to damage, and therefore adopts short-circuit detecting module as shown in Figure 4, when OUT terminal shortcircuit (atomizer short circuit), short-circuit detecting module detects, and prevents the excessive damage device of output current.In the diagram, the 6th metal-oxide-semiconductor P6, the 7th metal-oxide-semiconductor P7, the 8th metal-oxide-semiconductor P8, the 9th metal-oxide-semiconductor P9 form mirror current source, and the tenth metal-oxide-semiconductor N1 goes out to obtain electric current from the 7th metal-oxide-semiconductor P7 and is supplied to the 11 metal-oxide-semiconductor N2.When OUT end does not have short circuit grounding, the 12 metal-oxide-semiconductor N3 will obtain electric current from the 8th metal-oxide-semiconductor P8, make output SC be high level; When OUT terminal shortcircuit ground connection, there is electric current at the 11 metal-oxide-semiconductor N2 place, makes the 12 metal-oxide-semiconductor N3 obtain electric current from the 11 metal-oxide-semiconductor N2, makes output SC be low level, thus reaches and detect the object that OUT holds whether short circuit.
The present invention is corresponding provides a kind of electronic cigarette, refer to Fig. 5, it comprises: battery BAT, atomizer L1, LED light D1, interrupteur SW and electronic cigarette control chip U1, the vdd terminal of described electronic cigarette control chip U1 connects the positive pole of battery BAT, the GND end of described electronic cigarette control chip U1 connects negative pole and the ground of battery BAT, the SW end of described electronic cigarette control chip U1 connects the negative pole of battery BAT by described interrupteur SW, the OUT end of described electronic cigarette control chip U1 connects charging inlet J1, also by atomizer L1 ground connection, the LED end of described electronic cigarette control chip U1 connects the positive pole of LED light D1, the minus earth of described LED light D1.
In electronic cigarette, when interrupteur SW disconnects, electronic cigarette control chip U1 is in holding state always, and when only detecting that gauge tap SW is closed or OUT terminal voltage is greater than vdd terminal voltage, electronic cigarette control chip U1 just can open internal oscillator and voltage reference module.In electronic cigarette control chip U1, have independently temperature protection module, as long as ensure that electronic cigarette control chip temperature just must quit work immediately higher than the temperature spot of inner setting, and temperature protection module is not by the impact of other modules.
The present invention is the corresponding a kind of working state control method providing above-mentioned electronic cigarette also, and refer to Fig. 6, it comprises:
The SW end of S100, working state control module detected electrons cigarette control chip is opened, or the internal oscillator that starts when whether being greater than the voltage of its vdd terminal of the voltage of OUT end and voltage reference module;
S200, working state control module detect the voltage that described OUT holds and whether are greater than the voltage of its vdd terminal; If so, then judge that electronic cigarette control chip is mode of operation; If not, judge that electronic cigarette control chip is charge mode.
Wherein, in step s 200, when judging that electronic cigarette control chip is charge mode, described charged state control module compares the voltage of vdd terminal and the size of the first reference voltage V 1 and the second reference voltage V 2; When the voltage of vdd terminal is less than the first reference voltage V 1, the first charging current I1 of constant voltage is adopted to charge the battery; When the voltage of vdd terminal is between the first reference voltage V 1 and the second reference voltage V 2, the second charging current I2 of constant voltage is adopted to charge the battery; When the voltage of vdd terminal is greater than the second reference voltage V 2, the 3rd charging current I3 of constant voltage is adopted to charge the battery.Wherein, the second charging current I2 is greater than the first charging current I1 and is less than the 3rd charging current I3.Then, start first timer, timing terminate or OUT terminal voltage lower than vdd voltage time, make electronic cigarette control chip exit charged state, and enter holding state.
When working state control module detects that switch closes, electronic cigarette control chip needs to detect vdd terminal voltage (i.e. lithium battery voltage) and whether is greater than inner setting electrical voltage point V3, thus prevent lithium battery voltage too low, drive atomizer DeGrain, and low-voltage discharge impacts lithium battery excessively, detect atomizer whether short circuit afterwards, prevent discharge current excessive, burn out electronic cigarette control chip and lithium battery.After the work of driving atomizer, start second timer, prevent long-time electric discharge.
The present invention is the corresponding Application Example providing the working state control method of electronic cigarette also, as shown in Figure 7, when sense switch is pressed or OUT terminal voltage is greater than vdd terminal voltage, opens internal oscillator and voltage reference module; Now be divided into two kinds of situations: the first situation, when detecting OUT terminal voltage and being greater than vdd terminal voltage, battery charging voltage is detected by charged state control module, and select applicable charging current according to aforesaid way, and when the charge timing time arrives, or electronic cigarette control chip when disconnecting with charger, is made to enter holding state; The second situation, when interrupteur SW is pressed, detect cell discharge voltage, discharge voltage exceed circuit is set time, electronic cigarette control chip is made to enter holding state, prevent lithium battery voltage too low, drive atomizer DeGrain, and low-voltage discharge impacts lithium battery excessively.Detect atomizer whether short circuit afterwards, make electronic cigarette control chip enter holding state in atomizer short circuit, prevent discharge current excessive, burn out electronic cigarette control chip and lithium battery.When atomizer does not have short circuit, drive atomizer work, and when timing arrives or interrupteur SW disconnects, make electronic cigarette control chip enter holding state.
In sum, electronic cigarette control chip provided by the invention and electronic cigarette, held by the SW of working state control module detected electrons cigarette control chip and open, or the internal oscillator that the voltage of OUT end starts when whether being greater than the voltage of its vdd terminal and voltage reference module make electronic cigarette control chip start working, then detect by working state control module the voltage whether voltage that described OUT holds be greater than its vdd terminal; If so, then judge that electronic cigarette control chip is mode of operation; If not, judge that electronic cigarette control chip is charge mode, achieve the different operating state of accurate detected electrons cigarette control chip, it is according to its mode of operation of working state control.And detecting that the temperature of electronic cigarette control chip is greater than the temperature spot of its inner setting, quitting work immediately, preventing lithium battery temperature too high.
The peripheral components that electronic cigarette control chip of the present invention uses is few, circuit structure is simple; avoid the management of charging and discharging of the differentia influence lithium battery of external devices; and there is independently temperature protection module, when ensureing that electronic cigarette control chip temperature is too high, charging and discharging module no longer works.
Meanwhile, when electronic cigarette control chip is charged, can ensure when large current charge, accurately control the scope of electric current, improve charge efficiency.
In addition, electronic cigarette control chip of the present invention also has 0V charge function, namely when lithium battery be low pressure, electronic cigarette control chip work can not be ensured when, connect after external power source, electronic cigarette control chip also can start and carry out charging operations to lithium battery.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (8)
1. an electronic cigarette control chip, is characterized in that, comprising:
Whether the SW end for detected electrons cigarette control chip is opened, and whether the voltage of the OUT end of detected electrons cigarette control chip is greater than the working state control module of the voltage of its vdd terminal;
Open for the SW end when electronic cigarette control chip, or the internal oscillator that starts when whether being greater than the voltage of its vdd terminal of the voltage of OUT end and voltage reference module;
For controlling the charged state control module that electronic cigarette control chip is charged to external cell;
For controlling the holding state judge module of the holding state of electronic cigarette control chip;
For when electronic cigarette control chip temperature is higher than preset temperature, control the out-of-work temperature protection module of electronic cigarette control chip;
The first input end of described working state control module connects the SW end of electronic cigarette control chip, first output of described working state control module connects OUT end and the LED end of electronic cigarette control chip, second output of working state control module connects the first input end of holding state judge module, temperature protection module connects the second input of holding state judge module, the output of holding state judge module is connected the second input of working state control module and the first input end of charged state control module by internal oscillator with voltage reference module, second input of described charged state control module connects the OUT end of electronic cigarette control chip, first output of charged state control module connects the LED end of electronic cigarette control chip, second output of charged state control module connects the first input end of holding state judge module.
2. electronic cigarette control chip according to claim 1, it is characterized in that, described working state control module comprises working state control module and comprises the first comparator, first metal-oxide-semiconductor, first phase inverter and the second metal-oxide-semiconductor, the negative input end of described first comparator connects the vdd terminal of electronic cigarette control chip, the positive input terminal of the first comparator connects the OUT end of electronic cigarette control chip, the output of described first comparator connects the grid of the first metal-oxide-semiconductor, the source electrode of the first metal-oxide-semiconductor connects the internal electric source of electronic cigarette control chip, the drain electrode of the first metal-oxide-semiconductor connects described vdd terminal, the substrate of the first metal-oxide-semiconductor connects the grid of the second metal-oxide-semiconductor by the first phase inverter, the source electrode of the second metal-oxide-semiconductor connects the internal electric source of electronic cigarette control chip, the drain electrode of the second metal-oxide-semiconductor connects described vdd terminal.
3. electronic cigarette control chip according to claim 2, is characterized in that, described first metal-oxide-semiconductor and the second metal-oxide-semiconductor are P channel MOS tube.
4. electronic cigarette control chip according to claim 1, it is characterized in that, described charged state control module comprises the second comparator, 3rd comparator, 3rd metal-oxide-semiconductor, 4th metal-oxide-semiconductor, 5th metal-oxide-semiconductor and resistance, drain electrode and the drain electrode of the 4th metal-oxide-semiconductor of described 3rd metal-oxide-semiconductor are all connected the OUT end of electronic cigarette control chip, the substrate of described 3rd metal-oxide-semiconductor connects the grid of the 4th metal-oxide-semiconductor, the source electrode of described 3rd metal-oxide-semiconductor connects the positive input terminal of the second comparator, the positive pole of external cell is also connected by the vdd terminal of electronic cigarette control chip, the source electrode of described 4th metal-oxide-semiconductor connects the negative input end of the second comparator and the source electrode of the 5th metal-oxide-semiconductor, the output of described second comparator connects the grid of the 5th metal-oxide-semiconductor, resistance eutral grounding is passed through in the drain electrode of the 5th metal-oxide-semiconductor, the positive input terminal of described 3rd comparator connects the internal reference voltage end of electronic cigarette control chip, the negative input end of the 3rd comparator is by described resistance eutral grounding, the output of described 3rd comparator connects the grid of the 3rd metal-oxide-semiconductor.
5. electronic cigarette control chip according to claim 4, is characterized in that, described 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor are P channel MOS tube.
6. electronic cigarette control chip according to claim 1, it is characterized in that, described electronic cigarette control chip also comprises short-circuit detecting module, hold with the OUT of electronic cigarette control chip and be connected, described short-circuit detecting module comprises: the 6th metal-oxide-semiconductor, 7th metal-oxide-semiconductor, 8th metal-oxide-semiconductor, 9th metal-oxide-semiconductor, tenth metal-oxide-semiconductor, 11 metal-oxide-semiconductor, 12 metal-oxide-semiconductor and the second phase inverter, the grid of described 6th metal-oxide-semiconductor is connected the REFI end of electronic cigarette control chip with drain electrode, the source electrode of the 6th metal-oxide-semiconductor, the source electrode of the 7th metal-oxide-semiconductor, source electrode and the source electrode of the 9th metal-oxide-semiconductor of the 8th metal-oxide-semiconductor are all connected the in-line power end of electronic cigarette control chip, the substrate of the 6th metal-oxide-semiconductor connects the grid of the 7th metal-oxide-semiconductor, the drain electrode of the 7th metal-oxide-semiconductor connects the drain and gate of the tenth metal-oxide-semiconductor and the grid of the 11 metal-oxide-semiconductor, the substrate of described 7th metal-oxide-semiconductor connects the grid of the 8th metal-oxide-semiconductor, the drain electrode of the 8th metal-oxide-semiconductor connects the drain electrode of the 11 metal-oxide-semiconductor and the grid of the 12 metal-oxide-semiconductor, the substrate of described 8th metal-oxide-semiconductor connects the grid of the 9th metal-oxide-semiconductor, the drain electrode of described 9th metal-oxide-semiconductor connects the input of the second phase inverter and the drain electrode of the 12 metal-oxide-semiconductor, the output of the second phase inverter connects working state control module, the source electrode of the tenth metal-oxide-semiconductor and the source ground of the 12 metal-oxide-semiconductor, the source electrode of the 11 metal-oxide-semiconductor connects the OUT end of electronic cigarette control chip.
7. electronic cigarette control chip according to claim 6, is characterized in that, described 6th metal-oxide-semiconductor, the 7th metal-oxide-semiconductor, the 8th metal-oxide-semiconductor and the 9th metal-oxide-semiconductor are P channel MOS tube, and the tenth metal-oxide-semiconductor, the 11 metal-oxide-semiconductor and the 12 metal-oxide-semiconductor are N-channel MOS pipe.
8. an electronic cigarette, it is characterized in that, comprise: battery, atomizer, LED light, switch and the electronic cigarette control chip as described in claim 1-7 any one, the vdd terminal of described electronic cigarette control chip connects the positive pole of battery, the GND end of described electronic cigarette control chip connects negative pole and the ground of battery, the SW end of described electronic cigarette control chip connects the negative pole of battery by described switch, the OUT end of described electronic cigarette control chip connects charging inlet, also by atomizer ground connection, the LED end of described electronic cigarette control chip connects the positive pole of LED light, the minus earth of described LED light.
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