Electronic cigarette and power supply circuit thereof

Abstract

The present invention provides an electronic cigarette and a power supply circuit thereof. The power supply circuit includes a power circuit. The power supply circuit further includes: a first booster circuit connected to the power circuit to boost up the voltage outputted by the power circuit to a first voltage to be supplied to a microcontroller of the electronic cigarette; and a second booster circuit connected to the power circuit to boost up the voltage outputted by the power circuit to a second voltage to be supplied to an output stage switch circuit of the electronic cigarette. The electronic cigarette and the power supply circuit thereof can ensure the operating voltage of the microcontroller more stable, so that the power supply circuit can supply power normally even if different operating voltages are required by different power consumption devices.

1 - 11 . (canceled) 
     
     
         12 . A power supply circuit for an electronic cigarette, comprising a power circuit, the power supply circuit further comprising:
 a first booster circuit connected to the power circuit, configured for boosting up the voltage outputted by the power circuit to a first voltage and supplying the first voltage to a microcontroller of the electronic cigarette;   a second booster circuit connected to the power circuit, configured for boosting up the voltage outputted by the power circuit to a second voltage and supplying the second voltage to an output stage switch circuit of the electronic cigarette.   
     
     
         13 . The power supply circuit for the electronic cigarette according to  claim 12 , wherein the second booster circuit is further configured for supplying the second voltage to a display circuit of the electronic cigarette. 
     
     
         14 . The power supply circuit for the electronic cigarette according to  claim 12 , further comprising a voltage stabilization circuit connected to an output end of the first booster circuit, configured for performing voltage stabilization processing on the first voltage, and after the voltage stabilization processing, for supplying the first voltage to the microcontroller of the electronic cigarette. 
     
     
         15 . The power supply circuit for the electronic cigarette according to  claim 12 , wherein the power circuit comprises a power source and a protection circuit connected sequentially. 
     
     
         16 . The power supply circuit for the electronic cigarette according to  claim 12 , wherein the first booster circuit comprises a first booster unit and a first switch unit, the voltage outputted by the power circuit is inputted from an input end of the first booster unit, and the boosted first voltage is outputted to an input end of the first switch unit. 
     
     
         17 . The power supply circuit for the electronic cigarette according to  claim 12 , wherein the second booster circuit comprises a second booster unit and a second switch unit, the voltage outputted by the power circuit is inputted from an input end of the second booster unit, and the boosted second voltage is outputted to an input end of the second switch unit. 
     
     
         18 . An electronic cigarette comprising a microcontroller, an output stage switch circuit and an atomizing circuit, wherein the microcontroller controls the output stage switch circuit to control the atomizing circuit, the electronic cigarette further comprises the power supply circuit for the electronic cigarette according to  claim 12 . 
     
     
         19 . The electronic cigarette according to  claim 18 , further comprising a temperature sensing circuit connected to the microcontroller, wherein the temperature sensing circuit is configured for detecting an operating temperature of the atomizing circuit, when the operating temperature of the atomizing circuit exceeds a preset threshold, the microcontroller turns off the atomizing circuit. 
     
     
         20 . A power supply method for an electronic cigarette according to  claim 18 , the method comprises:
 boosting up the voltage outputted by the power circuit to a first voltage by the first booster circuit, and supplying the first voltage to the microcontroller of the electronic cigarette;   boosting up the voltage outputted by the power circuit to a second voltage by the second booster circuit, and supplying the second voltage to the output stage switch circuit of the electronic cigarette.   
     
     
         21 . The power supply circuit for the electronic cigarette according to  claim 16 , wherein the first booster unit comprises a boost converter chip and related peripheral components. 
     
     
         22 . The power supply circuit for the electronic cigarette according to  claim 21 , wherein the boost converter chip adopts an integrated circuit chip TPS61040, and for the integrated circuit chip TPS61040:
 an inductor L 1  is connected between pin 1 and pin 5, pin 1 is also connected to the anode of a diode D 1 ;   pin 2 is connected to the common terminal of voltage dividing resistors R 1 , R 2  connected in series; the voltage dividing resistors R 1 , R 2  are connected in series between the cathode of the diode D 1  and ground; a capacitor C 1  is further connected between the cathode of the diode D 1  and pin 2;   pin 3 is grounded, a capacitor C 2  is further connected between the cathode of the diode D 1  and pin 3;   pin 4 is grounded through a resistor R 3 , and pin 4 is connected to the control signal;   pin 5 is connected to the power circuit, and pin 5 is further grounded through a capacitor set.   
     
     
         23 . The power supply circuit for the electronic cigarette according to  claim 16 , wherein the first switch unit adopts an integrated circuit chip UMC 3 N, and for the integrated circuit chip UMC 3 N adopted by the first switch unit:
 pin 1 is grounded;   pin 2 is connected to the control signal;   pin 3 is connected to an output end of the first booster unit;   pin 4 is connected to a voltage stabilization circuit as an output end of the first booster circuit, the voltage stabilization circuit being configured for performing voltage stabilization processing on the first voltage, and after the voltage stabilization processing, for supplying the first voltage to the microcontroller of the electronic cigarette.   
     
     
         24 . The power supply circuit for the electronic cigarette according to  claim 17 , wherein the second booster unit comprises a boost converter chip and related peripheral components. 
     
     
         25 . The electronic cigarette according to  claim 18 , wherein the power supply circuit for the electronic cigarette further comprises a voltage stabilization circuit, the voltage stabilization circuit is connected to the microcontroller for supplying power to the microcontroller. 
     
     
         26 . The electronic cigarette according to  claim 18 , wherein a reverse protection diode is further connected between an output end of the power circuit and the microcontroller.