Electronic atomization device and control circuit for increasing driving frequency of electronic atomization device

Abstract

The invention discloses an electronic atomization device and a control circuit for increasing the driving frequency of the electronic atomization device. The control circuit comprises a reverse control unit, a push-pull output unit and a power output unit, wherein the reverse control unit outputs control signals according to received PWM pulse signals, the push-pull output unit is controlled to realize the push-pull circuit to be conducted, driving waves are outputted, and power conversion of the whole circuit in the electronic atomization device is controlled. According to the control circuitdisclosed in the invention, the PWM pulses effectively cut off the power supply through high-level conduction low-level cutoff characteristics of a reverse switching transistor Q10A in the reverse control unit; and correspondingly, the push-pull output unit adopts an N-type switching transistor and a P-type switching transistor to form a symmetrical push-pull driving circuit, in alternate switching between the high level and the low level of the PWM pulses, the circuit conducted and turn-off delay cycle of the push-pull output unit is adjusted to 1 to 10 microseconds, the frequency cycle is greatly shortened, and the driving frequency is further enhanced.

Description

technical field [0001] The invention relates to a control circuit of an electronic atomization device, in particular to a control circuit for increasing the driving frequency of the electronic atomization device and the electronic atomization device. Background technique [0002] like figure 1 Shown is the push-pull output circuit of the existing electronic atomization device. Since VCC is the power supply voltage of the electronic atomization device 4.2V, and the PWM pulse amplitude output by the external MCU is 3V, there is a 1.2V voltage difference between the two, and the be internal pressure of the switching transistor Q8A is 0.7V, which is less than the 1.2V voltage difference , it may cause the switching transistor Q8A to be turned on; therefore, in the process of driving the entire power circuit, the switching transistor Q8A will not be completely turned off, and there will be a "virtual off" phenomenon, which may lead to the control of the electronic atomization de...

AI Technical Summary

Problems solved by technology

Its circuit control system uses the pull-down method of the switch tube Q11A to control the power switch tube Q12, and the switch tube Q11A conducts very quickly, about 1 microsecond; but because the drive frequency output by the switch tube Q12 is 200Hz-10KHz; When the switch tube Q11A is turned off, it can only be cut off by connecting its gate to the junction inner cover capacitor through the pull-up resistor R33. When the pull-up resistor R33 is 1K, the switch tube Q11A is turned off for only a few tens of microseconds. The delay time is about 20 microseconds, which cannot meet the current requirement of increasing the driving frequency of the power switch tube Q12 to above 20kHz

Images