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Circuit and method for finely modulating pulse width and dead-time of atomizer

A technology of dead time and pulse width modulation, applied in pulse duration/width modulation, tobacco, liquid injection devices, etc., can solve the problem of no need for dead time adjustment, so as to improve atomization efficiency and reduce input voltage , reduce the effect of EMI

Active Publication Date: 2018-02-09
CHIPSEA TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dual MOS drive humidifier has many advantages, there is currently no MCU that can meet the dead time adjustment requirements in the market

Method used

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  • Circuit and method for finely modulating pulse width and dead-time of atomizer
  • Circuit and method for finely modulating pulse width and dead-time of atomizer
  • Circuit and method for finely modulating pulse width and dead-time of atomizer

Examples

Experimental program
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example 2

[0049] The following is the preferred example 2, taking the voltage-reducing end control of the electronic cigarette as an example.

[0050] First, use an external crystal oscillator as a reference frequency generator to provide a 1MHz frequency signal to the phase-locked loop, and the signal accuracy is 50ppm.

[0051] Further, the output frequency control bit unit provides configuration signal S1 to the PLL, so that the final output frequency of the PLL is 400KHz.

[0052] Further, the phase-locked loop multiplies the 1MHz signal to 24MHz, and the accuracy remains at 50ppm. According to the signal S1, the phase-locked loop divides the multiplied 24MHz by 60, and outputs 400KHz to the duty cycle adjustment circuit and XOR operation device.

[0053] Further, the control bit of the duty ratio adjustment circuit provides a configuration signal D1 to the duty ratio adjustment circuit, so that the duty ratio adjustment circuit adjusts the frequency signal F1 for duty ratio adjust...

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Abstract

The invention discloses a circuit and a method for finely modulating pulse width and dead-time of an atomizer, wherein the circuit comprises a reference frequency generator, an output frequency control bit, a phase-locked loop, a duty ratio adjusting circuit, an xor operator, a two phase non-overlapping clock generating circuit and two complementary PWM signal output chains and a PWM output signalselecting and outputting unit. The reference frequency generator is connected to the phase-locked loop which is divided into two paths, one of which is connected to the duty ratio adjusting circuit while the other of which is connected to the two phase non-overlapping clock generating circuit; the duty ratio adjusting circuit is connected to the xor operator behind, and the xor operator outputs aPWM signal to the PWM output signal selecting and outputting unit; the two phase non-overlapping clock generating circuit is separately connected to a complementary PWM signal 1 output chain and a complementary PWM signal 2 output chain to output the complementary PWM signals to the PWM output signal selecting and outputting unit.

Description

technical field [0001] The invention belongs to the technical field of electronic atomizers, in particular to a complementary circuit and method for micro-control chip output single-channel modulation duty ratio or output dead zone modulation of electronic atomizers, which is very beneficial to electronic cigarettes and low EMI atomization The design of applications such as devices. Background technique [0002] With the restrictions on traditional cigarettes in many places, electronic cigarette products have been rapidly popularized due to their characteristics of little harm to the body and no triggering of smoke alarms. The early EGO electronic cigarettes used a common built-in oscillator for frequency division, and controlled the tobacco power by controlling the duty cycle of the PWM wave in different time periods. [0003] At this stage, for electronic cigarettes using this circuit form, PWM is obtained by frequency division of internal associated oscillators. Commonly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B17/06H03K7/08A24F47/00
CPCH03K7/08B05B17/0607
Inventor 林俊盛王伟褚晓峰刘帅锋
Owner CHIPSEA TECH SHENZHEN CO LTD