CN104460378A - Novel electronic cigarette controller having open and short circuit detection function - Google Patents
Novel electronic cigarette controller having open and short circuit detection function Download PDFInfo
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- CN104460378A CN104460378A CN201410705785.2A CN201410705785A CN104460378A CN 104460378 A CN104460378 A CN 104460378A CN 201410705785 A CN201410705785 A CN 201410705785A CN 104460378 A CN104460378 A CN 104460378A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The invention discloses a novel electronic cigarette controller having an open and short circuit detection function. The novel electronic cigarette controller comprises a microphone, a control chip, a battery, a heating wire having an atomization function and an LED lamp. The novel electronic cigarette controller is characterized in that the VDD pin of the control chip is connected with the positive pole of the battery, the VSS pin of the control chip is connected with the negative pole of the battery, the AT pin of the control chip is connected with the heating wire having the atomization function and meanwhile serves as a charging interface of the battery, the LED pin of the control chip is connected with the LED lamp, and the SW pin of the control chip is connected with the microphone. The novel electronic cigarette controller having the open and short circuit detection function improves the safety in the assembling and using process.
Description
Technical field
The present invention relates to a kind of novel electronic cigarette controller with function of short circuit detection.
Background technology
Electronic cigarette is a kind of by powered battery, and whether the motion determination being detected air-flow by inner detection module is in smoking state, and operates heater strip, realizes the electronic equipment of smoking effect.Conveniently user uses, and battery, control chip, heater strip tobacco tar seemingly, and are all assembled in smoke pipe inside by electronic cigarette appearance design and common cigarette comparing class.
But be all adopt control chip to be directly welded on control circuit board in the process of producing electronic cigarette, push away on the metal sleeve of embedding electronic cigarette afterwards again, complete the assembling of electronic cigarette, in this assembling process, very easily produce drive end and the sleeve short circuit of control chip, cause chip to generate heat instantaneously, even cause chip to burn.Simultaneously due between heater strip and wire by welding or riveting together, heating wire and device wire are directly connected and there is unstable situation.But also can realize open circuit without any a kind of electronic cigarette control chip at present to detect and protection, how increase such New function, become the subject matter that the design of present electronic cigarette is concerned about.
Also can realize open circuit without any a kind of electronic cigarette control chip in prior art to detect and defencive function; the loose contact caused in process of production will cause pilot lamp in smoking process bright; but do not have smog to produce, sacrifice the comfort of user, have potential safety hazard.
Summary of the invention
For solving above-mentioned existing shortcoming, fundamental purpose of the present invention is the novel electronic cigarette controller with function of short circuit detection providing a kind of practicality, adds the electronic cigarette controller of open circuit measuring ability, enhances the security in assembling and use procedure.
For reaching above-described object, a kind of novel electronic cigarette controller with function of short circuit detection of the present invention takes following technical scheme:
A kind of novel electronic cigarette controller with function of short circuit detection, comprise miaow head, control chip, battery, the heater strip of atomizing functions and LED, it is characterized in that, the VDD pin of described control chip connects anode, VSS pin connects battery cathode, and AT pin connects the heater strip of atomizing functions, simultaneously also as the charging inlet of battery, LED pin connects LED, and SW pin connects miaow head.
Described control chip comprises smoking detection module, LED driver module, charging module, driver module, control module, open circuit detection module and short-circuit detecting module, by electrical connection between described above each module.
Comprise the following steps:
A: smoking detection module detects miaow head capacitance change and whether is greater than 6%;
B: miaow head capacitance change is greater than 6%, detect cell voltage and whether be greater than 3.2V, miaow head capacitance change is less than 6%, and driver module is closed, and display module is closed;
C: cell voltage is greater than 3.2V, short-circuit detecting module detects and exports whether short circuit, and whether AT pin is less than 0.6ohm to earth resistance, and cell voltage is less than 3.2V, and driver module is closed, and display module is reported to the police, and LED connects closedown after sudden strain of a muscle ten times;
D:AT pin is less than 0.6ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is greater than 0.6ohm to earth resistance, and whether open circuit detection module detects to export and open a way, and whether AT pin is greater than 25ohm to earth resistance;
E:AT pin is greater than 25ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is less than 25ohm to earth resistance, and driver module is opened, display module display smoking, and LED length is bright, and detects output current and whether be greater than 3A;
F: detect output current and be greater than 3A, overcurrent protection, driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, detect output current and be less than 3A, driver module is opened, and display module display smoking, LED is long bright.
Described smoking detection module according to the difference of miaow head, can set 3%, 6%, 9%, 12% 4 different threshold value, the variable quantity of miaow head electric capacity when detecting smoking.
Described charging module adopts the multiplex mode of output port and charging input end mouth, when AT is greater than vdd voltage, as charging port, when AT is less than VDD, as output port, and has constant-current constant-voltage charging characteristic safely and efficiently.
Described control chip also comprises protection module; protection module comprises open-circuit-protection unit, short-circuit protection unit, under-voltage protection unit and over-current protecting unit; short-circuit protection unit and over-current protecting unit are detected by AT end, and under-voltage protection unit is detected by vdd terminal.
Described open-circuit-protection unit and short-circuit protection unit are clearly indicated by LED.
A kind of electronic cigarette, is characterized in that, comprise the electronic cigarette circuit in claim 1 ~ 7 at least described in any one, and the change of chip pin order and the identical electronic cigarette of function.
Adopt the present invention of as above technical scheme, there is following beneficial effect:
Not only can realize under-voltage, overcurrent protection, can also realize open circuit and short-circuit detection protection function, can be indicated by LED to different conditions, control chip designs for one chip, and assemble simple, cost is low.
Accompanying drawing explanation
Fig. 1 is electronic cigarette finished product structure schematic diagram of the present invention.
Fig. 2 is electronic cigarette controller structural representation of the present invention.
Fig. 3 is electronic cigarette built-in function block diagram of the present invention.
Fig. 4 is flowchart of the present invention.
Embodiment
In order to further illustrate the present invention, be described further below in conjunction with accompanying drawing:
As depicted in figs. 1 and 2, a kind of novel electronic cigarette controller with function of short circuit detection of the present invention, comprises miaow head, control chip, battery, the heater strip of atomizing functions and LED, and heater strip provides heat for atomization.Battery provides power supply for whole electronic cigarette, and LED is as the indicator of electronic cigarette current state.The VDD pin of control chip connects anode, and VSS pin connects battery cathode, and AT pin connects the heater strip of atomizing functions, and simultaneously also as the charging inlet of battery, LED pin connects LED, and SW pin connects miaow head.
As shown in Figure 3, control chip adopts SOT23-5 encapsulation, each module is included.As preferably, control chip comprises smoking detection module, LED driver module, charging module, driver module, control module, open circuit detection module and short-circuit detecting module, by electrical connection between above each module.Smoking detection module according to the difference of miaow head, can set 3%, 6%, 9%, 12% 4 different threshold value, the variable quantity of miaow head electric capacity when detecting smoking.Charging module adopts the multiplex mode of output port and charging input end mouth, when AT is greater than vdd voltage, as charging port, when AT is less than VDD, as output port, and has constant-current constant-voltage charging characteristic safely and efficiently.Protection module comprises open-circuit-protection unit, short-circuit protection unit, under-voltage protection unit and over-current protecting unit, and short-circuit protection and overcurrent protection are detected by AT end, and under-voltage protection is detected by vdd terminal.Open-circuit-protection unit and short-circuit protection unit are clearly indicated by LED.
As shown in Figure 4, execution of the present invention is popular comprises the following steps:
A: smoking detection module detects miaow head capacitance change and whether is greater than 6%;
B: miaow head capacitance change is greater than 6%, detect cell voltage and whether be greater than 3.2V, miaow head capacitance change is less than 6%, and driver module is closed, and display module is closed;
C: cell voltage is greater than 3.2V, short-circuit detecting module detects and exports whether short circuit, and whether AT pin is less than 0.6ohm to earth resistance, and cell voltage is less than 3.2V, and driver module is closed, and display module is reported to the police, and LED connects closedown after sudden strain of a muscle ten times;
D:AT pin is less than 0.6ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is greater than 0.6ohm to earth resistance, and whether open circuit detection module detects to export and open a way, and whether AT pin is greater than 25ohm to earth resistance;
E:AT pin is greater than 25ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is less than 25ohm to earth resistance, and driver module is opened, display module display smoking, and LED length is bright, and detects output current and whether be greater than 3A;
F: detect output current and be greater than 3A, overcurrent protection, driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, detect output current and be less than 3A, driver module is opened, and display module display smoking, LED is long bright.
Under normal tobacco smoking status, smoking detection module, according to the capacitance variations of outside miaow head, judges whether to be in smoking state, and state flag bit is sent into control module.Control module controls driver module and display module accordingly according to the state flag bit of detection module, when detection module sends smoking zone bit, simultaneously when cell voltage is normal, control module controls display module display smoking state, control driver module to heating wire output current simultaneously, when cell voltage is not enough, control module sends electricity shortage signal to display module and closes driver module, and display module externally makes the alarm indication of electricity deficiency simultaneously.When detection module sends standby zone bit, control module is closed driver module and is controlled to close after display module display smoking stops.
When heater strip and AT port contact is bad or when disconnecting, electronic cigarette controller flows through the electric current of AT pin by sampling, this electric current is compared by current comparator with internal reference electric current, when sample rate current is less than internal reference electric current, comparer exports as low, and send open circuit enable signal (OP_en) to control module, after control module receives enable signal, short circuit display is sent to display module, LED often bright two seconds, then extinguish, and send shutdown signal to driver module, output power pipe is quit work.
When heater strip short circuit or the direct ground connection of AT pin, electronic cigarette controller flows through the electric current of AT pin by sampling, this electric current is compared by current comparator with internal reference electric current, when sample rate current is less than internal reference electric current, comparer exports as low, and send short circuit enable signal (SCP_en) to control module, after control module receives enable signal, short circuit display is sent to display module, LED often bright two seconds, then extinguish, and send shutdown signal to driver module, output power pipe is quit work.
The present invention is in order to improve the reliability of electronic cigarette; devise a kind of open circuit and short-circuit detecting module; conveniently user's detected electrons cigarette protects situation simultaneously; the present invention devises the electronic cigarette control chip of the clear display defencive function of energy; owing to considering the miniaturization of electronic cigarette control chip; in order to not increase pin number, namely detect the test side of output terminal load as electronic cigarette by output port (AT) simultaneously.When heater strip short circuit and AT interface disconnect or heater strip short circuit time, electronic cigarette controller can make electronic cigarette controller export cut-off, and is pointed out by LED, realizes the defencive function to electronic cigarette control chip, improves the dependability of electronic cigarette.
The present embodiment in a power-save mode quiescent current is less than 3uA, and during smoking, the electric current of atomizing piece is greater than 1A; This chip has visual LED work deixis simultaneously, according to different application states, has diacritic LED to indicate in chip enable, smoking period, voltage detecting, short-circuit protection, open-circuit-protection and charging process; Charging performance is superior, has perfect battery protection function; Include charging control circuit, support the charging equipments such as common fiery ox and USB.Be trickle charge when lithium cell charging voltage is less than 2.7V, can guarantee not damage battery, guarantee safety; When being charged to more than 2.7V, start large current charge, when voltage is close to 4.2V, charging current progressively declines.Charging voltage metrical error can be accomplished within 1%.Peripheral applications circuit is simple.Integrated voltage-stabilized pipe in IC, easy to process, reduce the wastage; Adopt SOT23-5 encapsulation, volume is little; Peripheral cell is few, and only use a LED lamp and an electric capacity, system cost is low.
Claims (8)
1. a novel electronic cigarette controller with function of short circuit detection, comprise miaow head, control chip, battery, the heater strip of atomizing functions and LED, it is characterized in that, the VDD pin of described control chip connects anode, VSS pin connects battery cathode, and AT pin connects the heater strip of atomizing functions, simultaneously also as the charging inlet of battery, LED pin connects LED, and SW pin connects miaow head.
2. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 1, it is characterized in that, described control chip comprises smoking detection module, LED driver module, charging module, driver module, control module, open circuit detection module and short-circuit detecting module, by electrical connection between described above each module.
3. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 2, is characterized in that, comprise the following steps:
A: smoking detection module detects miaow head capacitance change and whether is greater than 6%;
B: miaow head capacitance change is greater than 6%, detect cell voltage and whether be greater than 3.2V, miaow head capacitance change is less than 6%, and driver module is closed, and display module is closed;
C: cell voltage is greater than 3.2V, short-circuit detecting module detects and exports whether short circuit, and whether AT pin is less than 0.6ohm to earth resistance, and cell voltage is less than 3.2V, and driver module is closed, and display module is reported to the police, and LED connects closedown after sudden strain of a muscle ten times;
D:AT pin is less than 0.6ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is greater than 0.6ohm to earth resistance, and whether open circuit detection module detects to export and open a way, and whether AT pin is greater than 25ohm to earth resistance;
E:AT pin is greater than 25ohm to earth resistance, and driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, and AT pin is less than 25ohm to earth resistance, and driver module is opened, display module display smoking, and LED length is bright, and detects output current and whether be greater than 3A;
F: detect output current and be greater than 3A, overcurrent protection, driver module is closed, and display module is reported to the police, and LED is closed after long bright 2 seconds, detect output current and be less than 3A, driver module is opened, and display module display smoking, LED is long bright.
4. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 2, it is characterized in that, described smoking detection module can according to the difference of miaow head, set 3%, 6%, 9%, 12% 4 different threshold value, the variable quantity of miaow head electric capacity when detecting smoking.
5. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 2, it is characterized in that, described charging module adopts the multiplex mode of output port and charging input end mouth, when AT is greater than vdd voltage, as charging port, when AT is less than VDD, as output port, and there is constant-current constant-voltage charging characteristic safely and efficiently.
6. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 2; it is characterized in that; described control chip also comprises protection module; protection module comprises open-circuit-protection unit, short-circuit protection unit, under-voltage protection unit and over-current protecting unit; short-circuit protection unit and over-current protecting unit are detected by AT end, and under-voltage protection unit is detected by vdd terminal.
7. a kind of novel electronic cigarette controller with function of short circuit detection according to claim 6, it is characterized in that, described open-circuit-protection unit and short-circuit protection unit are clearly indicated by LED.
8. an electronic cigarette, is characterized in that, comprises the electronic cigarette circuit in claim 1 ~ 7 at least described in any one, and the change of chip pin order and the identical electronic cigarette of function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410705785.2A CN104460378A (en) | 2014-12-01 | 2014-12-01 | Novel electronic cigarette controller having open and short circuit detection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410705785.2A CN104460378A (en) | 2014-12-01 | 2014-12-01 | Novel electronic cigarette controller having open and short circuit detection function |
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| CN104460378A true CN104460378A (en) | 2015-03-25 |
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| CN201410705785.2A Pending CN104460378A (en) | 2014-12-01 | 2014-12-01 | Novel electronic cigarette controller having open and short circuit detection function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108827372A (en) * | 2018-03-21 | 2018-11-16 | 深圳麦克韦尔股份有限公司 | A kind of electronic cigarette state detection circuit, detection method and electronic cigarette |
| CN110384252A (en) * | 2018-04-17 | 2019-10-29 | 湖南中烟工业有限责任公司 | A kind of low temperature cigarette heating control system and method for heating and controlling |
| CN110543112A (en) * | 2019-07-16 | 2019-12-06 | 深圳瀚星翔科技有限公司 | Short-circuit rapid protection structure, method, power supply and electronic cigarette |
| CN110547516A (en) * | 2019-09-25 | 2019-12-10 | 深圳市康泓威科技有限公司 | Electronic cigarette with automatic closed-loop control output power supply chip |
| CN112773003A (en) * | 2021-01-28 | 2021-05-11 | 深圳市海派特光伏科技有限公司 | Special integrated chip for electronic atomizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108827372A (en) * | 2018-03-21 | 2018-11-16 | 深圳麦克韦尔股份有限公司 | A kind of electronic cigarette state detection circuit, detection method and electronic cigarette |
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| CN110547516A (en) * | 2019-09-25 | 2019-12-10 | 深圳市康泓威科技有限公司 | Electronic cigarette with automatic closed-loop control output power supply chip |
| CN112773003A (en) * | 2021-01-28 | 2021-05-11 | 深圳市海派特光伏科技有限公司 | Special integrated chip for electronic atomizer |
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Application publication date: 20150325 |