Electronic cigarette with automatic closed-loop control output power supply chip

Abstract

The invention discloses an electronic cigarette with an automatic closed-loop control output power supply chip. The electronic cigarette comprises an atomizer and a battery assembly which are connected with each other, wherein the atomizer comprises a heating element which is used for heating and atomizing a tobacco liquid; the battery assembly comprises a battery and a circuit control board, wherein the circuit control board is provided with a control circuit; the control circuit comprises a microcontroller, and the automatic closed-loop control output power supply chip, a microcontroller power supply unit and a starting switch which are electrically connected with the microcontroller separately; the control circuit is further provided with a reference resistor connected with the heatingelement; and the power supply chip is electrically connected with the battery, the reference resistor and the heating element. Under a command of the microcontroller, the power supply chip carries outautomatic closed-loop control by detecting the resistance value of the reference resistor and the feedback of the output voltage to output an adjustable precision voltage to the heating element, so that the high-precision automatic control of the output voltage can be realized, constant power output is achieved, and the heating element can produce a steady amount of smoke.

Description

technical field [0001] The invention relates to the technical field of electronic cigarettes, and more specifically, the invention relates to an electronic cigarette with an automatic closed-loop control output power chip. Background technique [0002] The existing atomized electronic cigarettes are usually heated by the atomizer to atomize the smoke liquid to generate smoke for smokers to use. Since the smoke liquid of the electronic cigarette does not contain smoke tar, the harm of smoke tar to people's health is avoided. Therefore, electronic cigarettes gradually replace cigarettes and are widely used. [0003] The power supply of the existing electronic cigarette comes from the internal battery. When the electronic cigarette is first used, the output voltage of the battery is too high, resulting in an excessive amount of smoke when smoking. With the increase of the use time of the electronic cigarette, the power of the battery will change from high to high. In the end, ...

AI Technical Summary

Problems solved by technology

[0004] Existing electronic cigarettes generally use PWM pulse width modulation to output the voltage to the heating element, which changes the size and frequency of the output voltage by adjusting the duty cycle, but when the battery voltage is lower than the required output voltage, the required output cannot be achieved Voltage

However, the full-bridge buck-boost circuit used in other fields has a complex structure and a large volume, which is not conducive to installation and use in the tight space of electronic cigarettes, and there is no circuit for accurately controlling the output voltage and output stable power, and the performance is unstable. , and the manufacturing cost is high

[0005] In the existing electronic cigarettes, there is no power chip that can manage the output of the power supply, especially there is no power chip that can increase or decrease the power supply voltage, output a stable and adjustable voltage, and output a constant power. Cigarette chips, or only control the current path of the heating wire through a switch tube, or only have constant voltage output control, but cannot adjust the voltage output to achieve constant power, so it cannot meet the above actual needs

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