WO2018161610A1

WO2018161610A1 - Atomization control circuit and electronic cigarette

Info

Publication number: WO2018161610A1
Application number: PCT/CN2017/108268
Authority: WO
Inventors: 邱伟华
Original assignee: 常州市派腾电子技术服务有限公司
Priority date: 2017-03-10
Filing date: 2017-10-30
Publication date: 2018-09-13
Also published as: CN206586398U

Abstract

Provided are an atomization control circuit and an electronic cigarette, wherein a power input end of a controller (100) and a power input end of the atomization circuit (200) are respectively connected with a power supply (400). The first input end of the controller (100) is connected to a feedback end of the atomization circuit (200), and an output end of the controller (100) is connected to the control input end of the atomization circuit (200). The output end of the atomization circuit (200) is connected to a heating element (300). The controller (100) is used for outputting a corresponding control signal according to the signal fed back by the feedback end of the atomization circuit (200). The atomization circuit (200) is used to output direct current to the heating element (300) under the control of the controller (100) to atomize smoke liquid. The controller (100) can control the atomization circuit (200) to output direct current to the heating element (300) at a constant power to atomize the liquid smoke according to the feedback signal from the feedback end of the atomization circuit (200). Therefore, the cost is reduced on the premise that the constant power can be output to the heating element (300).

Description

Atomization control circuit and electronic cigarette

Technical field

The utility model relates to the technical field of electronic cigarettes, in particular to an atomization control circuit and an electronic cigarette.

Background technique

Electronic cigarettes are electronic products that mimic cigarettes and have the same appearance, smoke, taste and feel as cigarettes. It is a product that allows users to use nicotine and the like after being atomized by means of atomization.

The atomization circuit of the conventional electronic cigarette usually adopts one or two signal boosting ICs (integrated circuits), two or four large current MOS tubes and one power inductor to form a half bridge or a full bridge circuit to achieve The purpose of outputting constant power is, but the cost is also increased due to the large amount of electronic materials used.

Utility model content

Based on this, it is necessary to provide an atomization control circuit and an electronic cigarette for the problem that the atomization circuit of the conventional electronic cigarette has high cost.

An atomization control circuit for controlling a voltage applied to a heating element, the atomization control circuit comprising a controller and an atomizing circuit; a power input end of the controller, and a power input end of the atomizing circuit Connecting a power source respectively; a first input end of the controller is connected to a feedback end of the atomization circuit, an output end of the controller is connected to a control input end of the atomization circuit; an output of the atomization circuit An end for connecting to the heating element;

The controller is configured to output a corresponding control signal according to a signal fed back by the feedback end of the atomization circuit; the atomization circuit is configured to output a direct current to the heating element under the control of the controller to The liquid is atomized.

In one embodiment, the atomization circuit includes an energy storage unit, a synchronous buck converter, and a DC conversion unit; one end of the energy storage unit and the input end of the synchronous buck converter jointly access the a power source, the other end of the energy storage unit is grounded; a control signal input end of the synchronous buck converter, The enable end is respectively connected to the controller; the feedback end of the synchronous buck converter is a feedback end of the atomization circuit; the output end of the synchronous buck converter and the input end of the DC conversion unit Connecting; the output end of the DC conversion unit is an output end of the atomization circuit.

In one of the embodiments, the energy storage unit includes at least one storage capacitor.

In one embodiment, the DC conversion unit includes a power inductor and at least one filter capacitor; one end of the power inductor is connected to an output end of the synchronous buck converter; and the other end of the power inductor is sequentially One end of the filter capacitor is connected; the other end of each of the filter capacitors is grounded; the common end of the power inductor and each of the filter capacitors is an output end of the DC conversion unit.

In one embodiment, the atomization control circuit further includes a feedback unit; an input end of the feedback unit is connected to an output end of the atomization circuit, and an output end of the feedback unit and the controller The two input terminals are connected; the feedback unit is configured to feed back the output voltage of the atomization circuit to the controller.

In one embodiment, the feedback unit includes a resistor R10, a resistor R12, and a capacitor C44;

One end of the resistor R10 is connected to the output end of the atomization circuit, and the other end of the resistor R10 is respectively connected to one end of the resistor R12 and one end of the capacitor C44; the other end of the resistor R12 is The other end of the capacitor C44 is commonly grounded; the common end of the resistor R10, the resistor R12 and the capacitor C44 is the output end of the feedback unit.

In one embodiment, the atomization control circuit further includes a charging circuit; an input end of the charging circuit is connected to an output end of the atomizing circuit, and an output end of the charging circuit is used to supply power to an external device.

In one of the embodiments, the charging circuit includes a USB charging unit; the USB charging unit is configured to supply power to the external device with a voltage of 5V.

In one embodiment, the USB charging unit includes a diode and a USB interface; a cathode of the diode is connected to an output of the atomizing circuit, and a cathode of the diode is connected to the USB interface.

An electronic cigarette comprising: an atomization control circuit and a heating element; the atomization control circuit is for controlling a voltage applied on the heating element; and the atomization control circuit comprises: a controller and an atomization circuit The power input end of the controller and the power input end of the atomization circuit are respectively connected to the power source; a first input end of the controller is coupled to a feedback end of the atomization circuit, an output end of the controller is coupled to a control input end of the atomization circuit; an output end of the atomization circuit is Heating element connection;

The above-mentioned atomization control circuit and the electronic cigarette have the beneficial effects that in the atomization control circuit and the electronic cigarette, the first input end of the controller is connected with the feedback end of the atomization circuit, and the output end of the controller and the atomization circuit The control input is connected. Moreover, the controller is configured to output a corresponding control signal according to the signal fed back from the feedback end of the atomizing circuit, so that the atomizing circuit can be controlled to output a direct current to the heating element at a constant power to fog the liquid. Therefore, the above-described electronic cigarette and atomization control circuit reduces the cost on the premise that a constant power can be output to the heating element.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For the sake of some embodiments of the present invention, those skilled in the art can obtain the drawings of other embodiments according to the drawings without any creative work.

1 is a block diagram showing the composition of an atomization control circuit and a heating element according to an embodiment;

2 is a block diagram showing one specific composition of the atomization control circuit and the heating element of the embodiment shown in FIG. 1;

3 is a specific circuit diagram of the atomization circuit, the feedback unit, the charging circuit, and the heating element in the atomization control circuit of the embodiment shown in FIG. 2.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Instead, provide these implementations The purpose of the examples is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning meaning The terminology used in the description of the invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

One embodiment provides an atomization control circuit, as shown in FIG. 1, for controlling the voltage applied to the heating element 300. Among them, the heating element 300 is, for example, a heating wire. The atomization control circuit includes a controller 100 and an atomization circuit 200. The power input terminal of the controller 100 and the power input terminal of the atomizing circuit 200 are respectively connected to the power source 400. A first input of controller 100 is coupled to a feedback terminal of atomizing circuit 200. The first input end of the controller 100 is configured to receive a signal fed back by the feedback end of the atomization circuit 200, and the feedback signal is, for example, a current value of the atomization circuit 200. The output of the controller 100 is coupled to the control input of the atomizing circuit 200, and the output of the controller 100 is used to output a control signal to the atomizing circuit 200. The output of the atomizing circuit 200 is for connection to the heating element 300.

The power source 400 is used to supply power to the controller 100 and the atomizing circuit 200, respectively. The controller 100 is configured to output a corresponding control signal according to a signal fed back by the feedback terminal of the atomizing circuit 200. Specifically, the controller 100 can adjust the power output by the atomizing circuit 200 according to the signal fed back by the atomizing circuit 200 so that the output power of the atomizing circuit 200 is kept constant. For example, if the controller 100 finds that the output power of the atomizing circuit 200 is reduced according to the feedback signal, the output power of the atomizing circuit 200 can be increased by adjusting the output control signal, and vice versa, thereby making the atomizing circuit 200 The output power remains constant.

The atomizing circuit 200 is configured to output a direct current to the heating element 300 under the control of the controller 100 to atomize the liquid. When the atomizing circuit 200 outputs a direct current, the direct current passes through the heating element 300 and is converted into thermal energy, thereby achieving the effect of atomizing the liquid.

Therefore, the atomization control circuit provided by the embodiment of the present invention can control the atomization circuit 200 to output constant power only by using the controller 100 and the atomization circuit 200, so that the constant power can be output to the heating element 300. Reduced costs.

In one embodiment, referring to FIG. 3 , the atomization circuit 200 includes an energy storage unit 210 , a synchronous buck converter 220 , and a DC conversion unit 230 . Wherein, one end of the energy storage unit 210 is synchronously stepped down The input terminal (VIN pin) of the converter 220 is commonly connected to the power source 400, and the other end of the energy storage unit 210 is grounded. The control signal input terminal (PWM pin) and the enable terminal (ENABLE pin) of the synchronous buck converter 220 are respectively connected to the controller 100. The feedback terminal (IOUT pin) of the synchronous buck converter 220 is the feedback terminal of the atomization circuit 200. Specifically, the feedback terminal of the synchronous buck converter 220 is connected to the first input terminal of the controller 100. Also, the feedback terminal (IOUT pin) of the synchronous buck converter 220 inputs the current value of the synchronous buck converter 220 to the first input terminal of the controller 100. The output of the synchronous buck converter 220 (VSW pin) is coupled to the input of the DC conversion unit 230. The output end of the DC conversion unit 230 is the output end of the atomization circuit 200. Specifically, the output end of the DC conversion unit 230 is connected to the heating element 300. When the atomizing circuit 200 outputs a direct current, the direct current passes through the heating element 300 and is converted into thermal energy, thereby achieving the effect of atomizing the liquid.

The energy storage unit 210 is configured to store electrical energy and output the stored electrical energy to the synchronous buck converter 220. Specifically, the energy storage unit 210 includes at least one storage capacitor. For example, referring to FIG. 3, the energy storage unit 210 may include a capacitor C43, a capacitor C34, and a capacitor C42. One end of the capacitor C43, one end of the capacitor C34, and one end of the capacitor C42 are respectively connected to the power source 400. The other end of the capacitor C43, the other end of the capacitor C34, and the other end of the capacitor C42 are commonly grounded. In the embodiment of the present invention, the capacitor C43, the capacitor C34, and the capacitor C42 are all large-capacity capacitors, for example, 100 μF.

Synchronous buck converter 220 uses a MOSFET tube as the low side switch and reduces the output voltage to match the load. Both the low side MOSFET and the high side MOSFET in synchronous buck converter 220 are driven by a PWM (Pulse Width Modulation) signal. Therefore, the control signal output by the controller 100 is a PWM signal, and the controller 100 can know the change of the load according to the electrical signal fed back by the synchronous buck converter 220, for example, the current value of the synchronous buck converter 220, thereby adjusting the PWM. The duty cycle of the signal controls the power output by the synchronous buck converter 220 such that the synchronous buck converter 220 outputs a relatively stable power. The duty ratio of the PWM signal output by the controller 100 may vary from 0% to 85%. Also, the signal output from the output of the synchronous buck converter 220 may be a square wave signal. The synchronous buck converter 220 can output a maximum voltage of 5.5V, a maximum current of 60A, and a power of 330W. In addition, in order to make the electronic cigarette have long-term stability, the power can be taken as 75W.

Specifically, in FIG. 3, DCDC_FB, DCDC_EN, CSP1, and TEMP_ADC represent four network lines, which are respectively connected to different pins of the controller 100. Wherein, the controller 100 passes the DCDC_FB The network transmits a PWM signal to the input of synchronous buck converter 220. The controller 100 enables the synchronous buck converter 220 through the DCDC_EN network, and the DCDC_EN network high-level synchronous buck converter 220 is activated, and the low-level synchronous buck converter 220 is turned off. The magnitude of the feedback output current of the synchronous buck converter 220 can be fed back to the first input of the controller 100 via the CSP1 network. The temperature of the synchronous buck converter 220 is fed back to the controller 100 through the TEMP_ADC network.

Further, the peripheral device of the synchronous buck converter 220 further includes a resistor R16, a capacitor C40, a capacitor C38 and a capacitor C41. The resistor R16 is a pull-down resistor. One end of the capacitor C40 is grounded and the other end is connected to the power source. One end of the capacitor C41 is grounded and the other end is connected. TEMP_ADC. Among them, the capacitor C40 is a small-capacity capacitor, and its function is to filter high-frequency clutter. The capacitance of the capacitor C40 is smaller than the capacitance of the capacitor C43, the capacitor C34 and the capacitor C42, for example, the capacitance of the capacitor C40 is 0.1 μF. Resistor R16 is a pull-down resistor. When the DCDC_EN network is high, the resistor R16 is also high. When the DCDC_EN network is low, the floating current on the DCDC_EN network can flow to the ground through the resistor R16 to ensure the network line. Is low. In addition, when the DCDC-EN network is low, the level of the input DCDC-EN network suddenly becomes high and then returns to low level due to voltage instability, so by setting the pull-down resistor (ie, resistor R16) ) to ensure that the network cable is low. Capacitor C38 is a bootstrap capacitor that supplies charge to the internal FET of synchronous buck converter 220. Capacitor C41 is also a small-capacitance capacitor, for example, 1nF, which functions to filter clutter for the signal of the TEMP_ADC network to improve the detection accuracy of the controller 100.

The DC conversion unit 230 is configured to convert the signal output by the synchronous buck converter 220 into a DC signal. Specifically, the DC conversion unit 230 includes a power inductor and at least one filter capacitor. One end of the power inductor is connected to the output of the synchronous buck converter 220. The other end of the power inductor is sequentially connected to one end of each filter capacitor. The other end of each filter capacitor is grounded. The common end of the power inductor and each filter capacitor is the output of the DC conversion unit 230. Among them, the power inductor is used to output a sine wave. Since the output of the synchronous buck converter 220 (VSW pin) outputs a square wave signal of a large current, and when the output of the synchronous buck converter 220 (VSW pin) outputs a high level, the power inductor stores energy. When the output of the synchronous buck converter 220 (VSW pin) outputs a low level, the power inductor discharges power, and therefore, the current output by the synchronous buck converter 220 passes through the power inductor and becomes a nearly sinusoidal wave from the square wave. Filter capacitors are used for filtering.

For example, please continue to refer to FIG. 3, the DC conversion unit 230 may include an inductor L1, a capacitor C36, a capacitor C25, a capacitor C13, and a capacitor C14. One end of the inductor L1 is an input end of the DC conversion unit 230. Specifically, one end of the inductor L1 is connected to an output end (VSW pin) of the synchronous buck converter 220. The other end of the inductor L1 is connected to one end of the capacitor C36, one end of the capacitor C25, one end of the capacitor C13, and one end of the capacitor C14. The other end of the capacitor C36, the other end of the capacitor C25, the other end of the capacitor C13, and the other end of the capacitor C14 are commonly grounded. The common end of the inductor L1, the capacitor C36, the capacitor C25, the capacitor C13 and the capacitor C14 is the output end of the DC conversion unit 230. Specifically, the common end of the inductor L1, the capacitor C36, the capacitor C25, the capacitor C13 and the capacitor C14 and the heating element 300 One end is connected and the other end of the heating element 300 is grounded.

Among them, the inductance L1 is the output power inductance. Since the output of the synchronous buck converter 220 (VSW pin) outputs a square wave signal of a large current, when the output of the synchronous buck converter 220 (VSW pin) outputs a high level, the inductor L1 stores energy. When the output of the synchronous buck converter 220 (VSW pin) outputs a low level, the inductor L1 discharges the electric energy, so that the current output from the synchronous buck converter 220 passes through the inductor L1, and the square wave becomes an approximate sine wave. Capacitor C36, capacitor C25, capacitor C13 and capacitor C14 have a filtering effect. When a similar sinusoidal current output from inductor L1 flows through these capacitors, it eventually becomes a smooth DC current. In this way, the finally obtained direct current can be converted into thermal energy by the heating element 300, thereby atomizing the liquid smoke.

In one of the embodiments, with continued reference to FIGS. 2 and 3, the atomization control circuit further includes a feedback unit 600. The input end of the feedback unit 600 is coupled to the output of the atomization circuit 200. Specifically, in conjunction with the above embodiment, the input of the feedback unit 600 is coupled to the output of the DC conversion unit 230. The output of feedback unit 600 is coupled to a second input of controller 100. The feedback unit 600 is configured to feed back the output voltage of the atomization circuit 200 to the controller 100.

In the embodiment shown in FIG. 3, after the second input of the controller 100 receives the output voltage fed back by the feedback unit 600, the signal fed back according to the output voltage and the feedback end of the synchronous buck converter 220 can be integrated. The duty cycle of the PWM signal is adjusted to control the power output by the synchronous buck converter 220 such that the synchronous buck converter 220 outputs a relatively stable power.

Specifically, referring to FIG. 3, the feedback unit 600 includes a resistor R10, a resistor R12, and a capacitor C44. One end of the resistor R10 is connected to the output terminal of the atomizing circuit 200. The other end of the resistor R10 and the resistor One end of R12 and one end of capacitor C44 are connected. The other end of the resistor R12 and the other end of the capacitor C44 are commonly grounded. The common end of the resistor R10, the resistor R12 and the capacitor C44 is the output end of the feedback unit 520, that is, the common end of the resistor R10, the resistor R12 and the capacitor C44 is connected to the second input terminal of the controller 100.

In one embodiment, referring to FIG. 2, the atomization control circuit further includes a charging circuit 500. The input of the charging circuit 500 is connected to the output of the atomizing circuit 200, and the output of the charging circuit 500 is used to supply power to an external device.

In the embodiment of the present invention, under the control of the controller 100, the atomization circuit 200 can output a predetermined charging voltage (for example, 5V voltage), so that the charging circuit 500 can supply power to external devices (eg, mobile phones, tablets, MP4, etc.). . When atomization is required, the controller 100, that is, the controller atomizing circuit 200, outputs a voltage and current suitable for heating the heating element 300; when charging the external device is required, the controller 100 controls the output of the atomizing circuit 200 to be adapted. The voltage and current of the charging circuit 500. Therefore, the embodiment of the present invention can realize the atomization function and the external device by only a relatively simple circuit, thereby improving the effective utilization of resources.

In addition, the controller 100 can also control the voltage output by the atomizing circuit 200 to be kept constant according to the voltage value fed back by the feedback unit 600 to improve the stability and safety of charging.

Specifically, the charging circuit 500 includes a USB charging unit 510. The USB charging unit 510 is for supplying power to the external device with a voltage of 5V. Referring to FIG. 3, the USB charging unit 510 may include a diode D3 and a USB interface J1. The anode of the diode D3 is connected to the output end of the atomizing circuit 200. The cathode of the diode D3 is connected to the USB interface J1. USB interface J1 is used to connect external devices.

Next, the operation principle of the above-described atomization control circuit provided by the present invention will be described by taking FIG. 3 as an example. When atomization is required, the controller 100 controls the atomizing circuit 200 to output a direct current to the heating element 300 to start atomization. During the atomization process, when the power source 400 discharges the power, the voltage across the power source 400 decreases, thereby causing the power output from the atomization circuit 200 to decrease. At this time, after detecting the magnitude of the current signal fed back by the CSP1 network, the controller 100 detects that the output power of the atomizing circuit 200 has decreased, and can appropriately increase the duty ratio of the PWM signal. As the duty ratio increases, the time for the inductor L1 to store electrical energy becomes longer, and the release of the electric energy is appropriately increased, thereby achieving the purpose of constant power output. When it is necessary to supply power to the external device, the controller 100 controls the atomizing circuit 200 to output a voltage of 5 V, and then the external device can be powered by the USB charging unit 510.

It should be noted that the atomization control circuit provided by the above embodiments can be applied to other technical fields besides the technical field of electronic cigarettes.

Another embodiment provides an electronic cigarette comprising: an atomization control circuit and a heating element. The atomization control circuit is for controlling a voltage applied to the heating element. And, the atomization control circuit includes a controller and an atomization circuit. The power input end of the controller and the power input end of the atomization circuit are respectively connected to a power source. A first input of the controller is coupled to a feedback end of the atomizing circuit, and an output of the controller is coupled to a control input of the atomizing circuit. An output of the atomizing circuit is coupled to the heating element. In addition, the electronic cigarette includes a power source for supplying electrical energy to the atomization control circuit.

The controller is configured to output a corresponding control signal according to a signal fed back by the feedback end of the atomization circuit. The atomizing circuit is configured to output a direct current to the heating element under the control of the controller to atomize the liquid.

It should be noted that, in the embodiment of the present invention, only the structure related to the atomization in the electronic cigarette is shown, and other structures are not described herein again.

In one embodiment, the atomization circuit includes an energy storage unit, a synchronous buck converter, and a DC conversion unit. One end of the energy storage unit is connected to the power source together with an input end of the synchronous buck converter, and the other end of the energy storage unit is grounded. The control signal input end and the enable end of the synchronous buck converter are respectively connected to the controller. The feedback end of the synchronous buck converter is the feedback end of the atomization circuit. An output of the synchronous buck converter is coupled to an input of the DC conversion unit. The output end of the DC conversion unit is an output end of the atomization circuit.

In one embodiment, the DC conversion unit includes a power inductor and at least one filter capacitor. One end of the power inductor is coupled to an output of the synchronous buck converter. The other end of the power inductor is sequentially connected to one end of each of the filter capacitors. The other end of each of the filter capacitors is grounded. The common end of the power inductor and each of the filter capacitors is an output end of the DC conversion unit.

In one embodiment, the electronic cigarette further includes a feedback unit. An input end of the feedback unit is connected to an output end of the atomization circuit, and an output end of the feedback unit is connected to a second input end of the controller. The feedback unit is configured to feed back an output voltage of the atomization circuit to the controller.

In one embodiment, the feedback unit includes a resistor R10, a resistor R12, and a capacitor C44.

One end of the resistor R10 is connected to an output end of the atomizing circuit, and the other end of the resistor R10 is respectively connected to one end of the resistor R12 and one end of the capacitor C44. The other end of the resistor R12 is commonly grounded to the other end of the capacitor C44. The common end of the resistor R10, the resistor R12 and the capacitor C44 is an output end of the feedback unit.

In one embodiment, the electronic cigarette further includes a charging circuit. An input end of the charging circuit is connected to an output end of the atomizing circuit, and an output end of the charging circuit is used to supply power to an external device.

In one of the embodiments, the charging circuit comprises a USB charging unit. The USB charging unit is used to supply power to an external device using a voltage of 5V.

In one of the embodiments, the USB charging unit includes a diode and a USB interface. The anode of the diode is connected to the output of the atomization circuit, and the cathode of the diode is connected to the USB interface.

It should be noted that the electronic cigarette provided by the embodiment of the present invention has the same structure as that of the atomization control circuit provided in the previous embodiment, and therefore will not be described herein.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the utility model. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An atomization control circuit for controlling a voltage applied to a heating element, wherein the atomization control circuit comprises a controller and an atomizing circuit; a power input end of the controller, the atomizing circuit The power input terminals are respectively connected to the power source; the first input end of the controller is connected to the feedback end of the atomization circuit, and the output end of the controller is connected to the control input end of the atomization circuit; An output of the circuit for connecting to the heating element;

The controller is configured to output a corresponding control signal according to a signal fed back by the feedback end of the atomization circuit; the atomization circuit is configured to output a direct current to the heating element under the control of the controller to The liquid is atomized.
The atomization control circuit according to claim 1, wherein the atomization circuit comprises an energy storage unit, a synchronous buck converter, and a DC conversion unit; one end of the energy storage unit and the synchronous step-down conversion The input end of the device is commonly connected to the power source, and the other end of the energy storage unit is grounded; the control signal input end and the enable end of the synchronous buck converter are respectively connected to the controller; a feedback end of the converter is a feedback end of the atomization circuit; an output end of the synchronous buck converter is connected to an input end of the DC conversion unit; an output end of the DC conversion unit is the atomization circuit The output.
The atomization control circuit of claim 2 wherein said energy storage unit comprises at least one energy storage capacitor.
The atomization control circuit according to claim 2, wherein the DC conversion unit comprises a power inductor and at least one filter capacitor; one end of the power inductor is connected to an output end of the synchronous buck converter; The other end of the power inductor is sequentially connected to one end of each of the filter capacitors; the other end of each of the filter capacitors is grounded; the common end of the power inductor and each of the filter capacitors is an output end of the DC conversion unit .
The atomization control circuit according to any one of claims 1 to 4, wherein the atomization control circuit further comprises a feedback unit; an input end of the feedback unit and an output end of the atomization circuit Connected, an output of the feedback unit is coupled to a second input of the controller; the feedback unit is configured to feed back an output voltage of the atomization circuit to the controller, the controller according to the feedback The output voltage fed back by the unit and the signal fed back from the feedback end of the atomization circuit output corresponding control signals.
The atomization control circuit according to claim 5, wherein the feedback unit comprises a resistor R10, a resistor R12 and a capacitor C44;

One end of the resistor R10 is connected to the output end of the atomization circuit, and the other end of the resistor R10 is respectively connected to one end of the resistor R12 and one end of the capacitor C44; the other end of the resistor R12 is The other end of the capacitor C44 is commonly grounded; the common end of the resistor R10, the resistor R12 and the capacitor C44 is the output end of the feedback unit.
The atomization control circuit according to any one of claims 1 to 4, wherein the atomization control circuit further comprises a charging circuit; an input end of the charging circuit and an output end of the atomizing circuit Connected, the output of the charging circuit is used to supply power to an external device.
The atomization control circuit according to claim 7, wherein the charging circuit comprises a universal serial bus USB charging unit; and the USB charging unit is configured to supply power to the external device with a voltage of 5V.
The atomization control circuit according to claim 8, wherein the USB charging unit comprises a diode and a USB interface; a positive pole of the diode is connected to an output end of the atomizing circuit, and a negative pole of the diode is The USB interface is connected.
An electronic cigarette, comprising: an atomization control circuit and a heating element; the atomization control circuit is for controlling a voltage applied on the heating element; and the atomization control circuit comprises: a controller And an atomizing circuit; the power input end of the controller and the power input end of the atomizing circuit are respectively connected to a power source; the first input end of the controller is connected to the feedback end of the atomizing circuit, and the control An output end of the device is connected to a control input end of the atomization circuit; an output end of the atomization circuit is connected to the heating element;

The controller is configured to output a corresponding control signal according to a signal fed back by the feedback end of the atomization circuit; the atomization circuit is configured to output a direct current to the heating element under the control of the controller to The liquid is atomized.