WO2023212884A1 - Electronic atomization apparatus - Google Patents

Abstract

An electronic atomization apparatus, comprising an integrated draw circuit (110) and a draw power amplification circuit (120), the integrated draw circuit (110) being connected to the draw power amplification circuit (120), the draw power amplification circuit (120) being used to connect a load (200), and the integrated draw circuit (110) being used to deliver constant-voltage output power supply to the load (200) by means of the draw power amplification circuit (120). The draw power amplification circuit (120) is added to the output side of the integrated draw circuit (110), power is amplified by means of the draw power amplification circuit (120), and constant-voltage output power supply is delivered to the load (200). This enhances power output and improves the vaping experience and atomization amount, and also prevents attenuation of the output voltage caused by increased load (200), enhancing the convenience of using the electronic atomization apparatus.

Description

Electronic atomization device Technical field

The present application relates to the technical field of atomization equipment, and in particular to an electronic atomization device.

Background technique

With the development of electronic atomization devices, more and more users use electronic atomization devices, so more and more people use electronic atomization devices on various occasions. The traditional electronic atomization device mainly uses a microphone integrated control circuit, which is small and compact, but cannot meet the high power demand when the amount of atmospheric sol is large, and thus cannot meet the taste demand for higher power. Traditional electronic atomization devices have the disadvantage of low convenience of use.

Contents of the invention

According to various embodiments of the present application, an electronic atomization device is provided, which can improve the convenience of use.

An electronic atomization device, including an integrated microphone circuit and a microphone power amplifier circuit. The integrated microphone circuit is connected to the microphone power amplifier circuit. The microphone power amplifier circuit is used to connect a load. The integrated microphone The head circuit is used to provide constant voltage output power to the load through the microphone power amplifier circuit.

In one embodiment, the electronic atomization device further includes a detection feedback circuit, which is connected to the integrated microphone circuit and the load, and is used to detect the status of the load and feed back the status detection signal to the load. The integrated microphone circuit; when the integrated microphone circuit determines that the resistance of the load decreases according to the status detection signal, it performs constant voltage output through the microphone power amplifier circuit.

In one embodiment, the integrated microphone circuit is also configured to stop supplying power to the load when it is determined that the load is short-circuited or open-circuited based on the status detection signal.

In one embodiment, the detection feedback circuit includes a negative feedback diode, the cathode of the negative feedback diode is connected to the load, and the anode of the negative feedback diode is connected to the integrated microphone circuit.

In one embodiment, the microphone power amplifier circuit is a non-inverting power amplifier circuit.

In one embodiment, the integrated microphone circuit includes an integrated microphone.

In one embodiment, the in-phase power amplification circuit includes a drive control switch, a power amplification control switch, a first bias resistor and a second bias resistor. The control end of the drive control switch is connected to the integrated microphone circuit. , the first end of the drive control switch is connected to the control end of the power amplifier control switch, the control end of the drive control switch is connected to the second end of the drive control switch through the first bias resistor, the The second end of the drive control switch is connected to ground; the control end of the power amplification control switch is connected to the first end of the power amplification control switch through the second bias resistor, and the first end of the power amplification control switch is connected to the power supply. terminal, and the second terminal of the power amplifier control switch is connected to the load.

In one embodiment, the drive control switch is a MOS tube, a transistor, a switching tube or an optocoupler device.

In one embodiment, the power amplification control switch is a MOS tube, a triode, a switching tube or a thyristor.

In one embodiment, the microphone power amplifier circuit is an ASC integrated chip power amplifier circuit.

In one embodiment, the integrated microphone circuit includes an ASC integrated chip.

In one embodiment, the electronic atomization device further includes a button connected to the integrated microphone circuit.

In one embodiment, the electronic atomization device further includes a power module connected to the integrated microphone circuit and the microphone power amplifier circuit.

In one embodiment, the electronic atomization device further includes a synchronous charging module connected to the integrated microphone circuit and the power module; the integrated microphone circuit is also used to charge when receiving a charging signal. , and simultaneously start the internal charging circuit and the synchronous charging module to quickly charge the power module.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the application will become apparent from the description, drawings and claims.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a structural block diagram of an electronic atomization device in an embodiment;

Figure 2 is a schematic structural diagram of an electronic atomization device in an embodiment;

Figure 3 is a schematic diagram of an integrated microphone circuit, microphone power amplifier circuit and detection feedback circuit in one embodiment;

Figure 4 is a schematic structural diagram of an electronic atomization device in another embodiment;

Figure 5 is a schematic diagram of an integrated microphone circuit, microphone power amplifier circuit and detection feedback circuit in another embodiment;

Figure 6 is a schematic diagram of a synchronous charging module in an embodiment;

Figure 7 is a comparison chart of the output voltage/resistance curve of the electronic atomization device of the present application and the traditional integrated microphone in one embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

In one embodiment, as shown in Figure 1, an electronic atomization device is provided, including an integrated microphone circuit 110 and a microphone power amplifier circuit 120. The integrated microphone circuit 110 is connected to the microphone power amplifier circuit 120. The microphone The power amplifier circuit 120 is used to connect to the load 200 , and the integrated microphone circuit 110 is used to provide constant voltage output power to the load 200 through the microphone power amplifier circuit 120 . The load 200 may specifically be an atomizer of an electronic atomization device.

Specifically, the integrated microphone circuit 110 may be an integrated microphone or an ASC (Application Specific Integrated Circuit) integrated chip. Taking the integrated microphone used in the integrated microphone circuit 110 as an example, when the user uses the electronic atomization device to perform a puffing action, the integrated microphone in the integrated microphone circuit 110 detects the negative suction pressure and activates the internal low-power PWM. (Pulse Width Modulation, pulse width modulation) circuit works and outputs a low-power PWM signal to provide low-power power supply to the load 200. When there is a demand for atomization with large aerosol volume and high power output, the microphone power amplifier circuit 120 serves as the main power output unit. At this time, the integrated microphone starts working after detecting the suction negative pressure, and outputs a PWM signal to control the microphone power amplifier circuit 120 to work. The microphone power amplifier circuit 120 outputs a high-power PWM current to the load 200 according to the PWM signal, and passes the microphone The head power amplifier circuit 120 performs constant voltage output to compensate for the taste, maintain the improvement of the suction taste and atomization volume, and will not cause the output voltage to attenuate due to increased load.

It can be understood that the integrated microphone circuit 110 is not the only way to detect whether there is an atmospheric sol amount and atomization requirements for high power output. Specifically, the integrated microphone circuit 110 can detect the status of the load 200, and analyze whether the atomization requirement conditions of atmospheric sol amount and high-power output are met according to the status of the load 200. The integrated microphone circuit 110 can also detect the atomization requirement of the load 200 according to the user's use of electronic atomizer. Analyze whether the control instructions input by the keystrokes of the atomization device meet the atomization demand conditions of atmospheric sol volume and high power output. After judging that the atomization requirements of atmospheric sol volume and high power output are met, the integrated microphone circuit 110 outputs a PWM signal to control the operation of the microphone power amplifier circuit 120, and provides high-power constant voltage power supply to the load 200 to maintain the suction taste and aerosol. The output voltage will not attenuate due to the increase in load. In applications where the power demand of the atomizer is increased, the increase in output power through the microphone power amplifier circuit 120 can fully meet the power demand of the atomizer to ensure the improvement of atomization taste and aerosol volume without affecting the performance of the atomizer. Due to the power mismatch, atomization cannot be produced or the output power is insufficient, which affects the taste and atomization amount.

In one embodiment, as shown in Figure 2, the electronic atomization device also includes a detection feedback circuit 130. The detection feedback circuit 130 is connected to the integrated microphone circuit 110 and the load 200, and is used to detect the status of the load 200 and feed back the status detection signal. to the integrated microphone circuit 110; when the integrated microphone circuit 110 determines that the resistance of the load decreases according to the state detection signal, it performs a constant voltage output through the microphone power amplifier circuit 120.

Specifically, the detection feedback circuit 130 can use a negative feedback diode to monitor the short circuit or open circuit of the atomizer in real time, and feed back the status detection signal to the integrated microphone. When the integrated microphone detects that the resistance of the atomizer decreases, it passes The microphone power amplification circuit 120 performs constant voltage output to maintain the improvement in puffing taste and atomization volume. Among them, the integrated microphone can immediately start the microphone power amplifier circuit 120 to start working when it detects that the resistance of the atomizer decreases, and provides high-power constant voltage power supply to the atomizer; the integrated microphone can also detect that the resistance of the atomizer decreases. After the resistance of the atomizer is reduced to the set threshold, the microphone power amplifier circuit 120 is started to work to provide high-power constant voltage power supply to the atomizer.

In addition, in one embodiment, the integrated microphone circuit 110 is also used to stop power supply to the load 200 when it is determined that the load 200 is short-circuited or open-circuited according to the status detection signal. Specifically, when there is no short circuit or open circuit in the atomizer, it can be considered that the resistance of the atomizer will change within the normal resistance range. The integrated microphone can analyze whether the detected resistance is too small or too large based on the received status detection signal and the preset comparison threshold (such as a threshold that is far beyond the upper and lower limits of the normal resistance range), and then analyze the atomizer Whether there is a short circuit or open circuit. When it is determined that the atomizer is short-circuited or open-circuited, the integrated microphone stops outputting the PWM signal, causing the microphone power amplifier circuit 120 to stop working to ensure the safety of the circuit.

In the above-mentioned electronic atomization device, a microphone power amplifier circuit 120 is added to the output side of the integrated microphone circuit 110. The microphone power amplifier circuit 120 performs power amplification and provides constant voltage output power to the load 200, thereby increasing the output power while also providing power. It maintains the improvement of the suction taste and atomization volume, and does not cause the attenuation of the output voltage due to increased load, improving the convenience of use of the electronic atomization device.

In one embodiment, integrated microphone circuit 110 includes an integrated microphone. As shown in Figure 2, the functions of the integrated microphone circuit 110 when using an integrated microphone include low current charging management, LED (Light Emitting Diode, light emitting diode) status display, negative voltage detection sensor, PWM low power output, and load short circuit detection. and load open circuit detection, etc. Further, in one embodiment, the microphone power amplifier circuit 120 is a non-inverting power amplifier circuit. The value of the input resistance of the non-phase power amplifier circuit does not affect its input impedance, so it can be adjusted more accurately. Specifically, as shown in Figure 3, the in-phase power amplifier circuit includes a drive control switch Q1, a power amplification control switch Q2, a first bias resistor R2 and a second bias resistor R4. The control end of the drive control switch Q1 is connected to the integrated microphone. In the circuit 110, the first end of the drive control switch Q1 is connected to the control end of the power amplifier control switch Q2, the control end of the drive control switch Q1 is connected to the second end of the drive control switch Q1 through the first bias resistor R2, and the control end of the drive control switch Q1 The second end is connected to ground; the control end of the power amplification control switch Q2 is connected to the first end of the power amplification control switch Q2 through the second bias resistor R4, the first end of the power amplification control switch Q2 is connected to the power supply terminal B+, and the power amplification control switch Q2 The second end is connected to load 200. Among them, the drive control switch Q1 can be a MOS tube, a triode, a switching tube or a photoelectric coupling device. The power amplifier control switch Q2 can be a MOS tube, a transistor, a switching tube or a thyristor. In this embodiment, the drive control switch Q1 is an N-channel MOS transistor, with the gate as the control terminal, the drain as the first terminal, and the source as the second terminal. The power amplifier control switch Q2 uses a P-channel MOS transistor, with the gate as the control terminal, the source as the first terminal, and the drain as the second terminal.

Specifically, the integrated microphone circuit 110 includes an integrated microphone MIC1. The in-phase power amplifier circuit may also include a current limiting resistor R1. The control end of the drive control switch Q1 is connected to the pin 4 of the integrated microphone MIC1 through the current limiting resistor R1. Pin 1 of the integrated microphone MIC1 is connected to the power terminal B+, and pin 3 of the integrated microphone MIC1 is connected to ground. The load 200 is connected between the terminal H+ and the terminal H-, the second end of the power amplifier control switch Q2 is connected to the load 200 through the terminal H+, and the terminal H- is grounded. The drive control switch Q1 is in a cut-off state when there is no PWM signal, and starts to conduct when there is a PWM signal, and starts the power amplification control switch Q2. The power amplification control switch Q2 is in a cut-off state when there is no driving PWM signal, and starts to conduct when there is a driving PWM signal, outputting high-power PWM current to the atomizer to start atomization.

In one embodiment, the detection feedback circuit 130 includes a negative feedback diode D1, the cathode of the negative feedback diode D1 is connected to the load 200, and the anode of the negative feedback diode D1 is connected to the integrated microphone circuit 110. Specifically, the cathode of the negative feedback diode D1 is connected to the load 200 through the terminal H+, and the anode of the negative feedback diode D1 is connected to the pin 4 of the integrated microphone MIC1. When the load 200 is short-circuited or open-circuited, the signal is negatively fed back to the integrated microphone MIC1 through the negative feedback diode D1. After the integrated microphone MIC1 makes a short-circuit or open-circuit judgment, it turns off the PWM signal output of pin 4 to Ensure the safety of the circuit.

In one embodiment, the integrated microphone circuit 110 includes an ASC integrated chip. As shown in FIG. 4 , the electronic atomization device also includes a button connected to the integrated microphone circuit 110 . When the integrated microphone circuit 110 adopts the ASC integrated chip, its functions include low current charging management, LED status display, key ignition start detection, PWM low power output, load short circuit detection and load open circuit detection, etc. Further, in one embodiment, the microphone power amplifier circuit 120 is an ASC integrated chip power amplifier circuit. Among them, as shown in Figure 5, the ASC integrated chip power amplifier circuit includes a drive control switch Q1, a power amplifier control switch Q2, a first bias resistor R2 and a second bias resistor R4. The control end of the drive control switch Q1 is connected to the integrated microphone. In the head circuit 110, the first end of the drive control switch Q1 is connected to the control end of the power amplifier control switch Q2. The control end of the drive control switch Q1 is connected to the second end of the drive control switch Q1 through the first bias resistor R2. The drive control switch Q1 The second end of the power amplification control switch Q2 is connected to the ground; the control end of the power amplification control switch Q2 is connected to the first end of the power amplification control switch Q2 through the second bias resistor R4, and the first end of the power amplification control switch Q2 is connected to the power supply terminal B+, and the power amplification control switch The second terminal of Q2 is connected to load 200. Among them, the drive control switch Q1 can be a MOS tube, a triode, a switching tube or a photoelectric coupling device. The power amplifier control switch Q2 can be a MOS tube, a transistor, a switching tube or a thyristor. In this embodiment, the drive control switch Q1 is an N-channel MOS transistor, with the gate as the control terminal, the drain as the first terminal, and the source as the second terminal. The power amplifier control switch Q2 uses a P-channel MOS transistor, with the gate as the control terminal, the source as the first terminal, and the drain as the second terminal.

Specifically, the integrated microphone circuit 110 includes an ASC integrated chip U1. The ASC integrated chip power amplifier circuit also includes a current limiting resistor R1. The control end of the drive control switch Q1 is connected to the pin 4 of the ASC integrated chip U1 through the current limiting resistor R1. The ASC Pin 1 of the integrated chip U1 is connected to the power terminal B+, pin 3 of the ASC integrated chip U1 is connected to the ground, pin 5 of the ASC integrated chip U1 is connected to one end of the button K1, and the other end of the button K1 is connected to the ground. The load 200 is connected between the terminal H+ and the terminal H-, the second end of the power amplifier control switch Q2 is connected to the load 200 through the terminal H+, and the terminal H- is grounded. The drive control switch Q1 is in a cut-off state when there is no PWM signal, and starts to conduct when there is a PWM signal, and starts the power amplification control switch Q2. The power amplification control switch Q2 is in a cut-off state when there is no driving PWM signal, and starts to conduct when there is a driving PWM signal, outputting high-power PWM current to the atomizer to start atomization.

In one embodiment, the detection feedback circuit 130 also includes a negative feedback diode D1. The cathode of the negative feedback diode D1 is connected to the load 200, specifically connected to the load 200 through the terminal H+. The anode of the negative feedback diode D1 is connected to the pin of the ASC integrated chip U1. 4. In addition, the electronic atomization device also includes a resistor R6, and the anode of the negative feedback diode D1 is connected to pin 4 of the ASC integrated chip U1 through the resistor R6. When the load 200 is short-circuited or open-circuited, the signal is negatively fed back to the ASC integrated chip U1 through the negative feedback diode D1. After the ASC integrated chip U1 makes a short-circuit or open-circuit judgment, it turns off the PWM signal output of pin 4 to protect the circuit. security.

In one embodiment, as shown in FIGS. 2 and 4 , the electronic atomization device further includes a power module 140 , and the power module 140 is connected to the integrated microphone circuit 110 and the microphone power amplifier circuit 120 . The power module 140 may specifically use energy storage components such as batteries to store electrical energy and provide power to the integrated microphone circuit 110 and the microphone power amplifier circuit 120 . Specifically, the power module 140 is connected to the power terminal B+ and the power terminal B-, and the power terminal B- is grounded. The power module 140 provides power supply to the integrated microphone circuit 110 and the microphone power amplifier circuit 120 through the power terminal B+.

In one embodiment, the electronic atomization device also includes a synchronous charging module 150. The synchronous charging module 150 is connected to the integrated microphone circuit 110 and the power module 140; the integrated microphone circuit 110 is also used to start the charging process at the same time when receiving the charging signal. The internal charging circuit and the synchronous charging module 150 work to quickly charge the power module 140. Among them, as shown in Figure 6, the synchronous charging module 150 includes chip U2, resistor R5, capacitor C4 and capacitor C5. Pin 4 of chip U2 is connected to the integrated microphone circuit 110 and the interface USB_IN. Pin 1 and pin of chip U2 2 and pin 5 are grounded, pin 3 of chip U2 is connected to power terminal B+, and pin 6 of chip U2 is grounded through resistor R5. One end of capacitor C4 is connected to pin 4 of chip U2, and the other end is grounded. One end of capacitor C5 is connected to pin 3 of chip U2, and the other end is grounded. Among them, pin 4 of chip U2 is connected to pin 2 of integrated microphone MIC1, or pin 4 of chip U2 is connected to pin 2 of ASC integrated chip U1.

Specifically, when the power of the electronic atomization device is low, the user can connect the USB (Universal Serial Bus) interface of the electronic atomization device to external devices such as computers, and the integrated microphone MIC1 or ASC integrated chip U1 is in After detecting that a charging signal is connected to the USB interface, the internal charging circuit and the external synchronous charging module 150 are started at the same time to increase the charging current to ensure fast charging when the power module 140 uses large-capacity batteries to achieve a large current. charging purpose.

In order to facilitate a better understanding of the above electronic atomization device, a detailed explanation will be given below with reference to specific embodiments.

Currently, the main circuit control methods of electronic atomization devices are microphone integrated and MCU (Micro Control Unit) discrete component methods. Among them, microphone integrated method is small in size, simple in circuit and affordable. However, due to the small output power and narrow compatibility range of load resistance, it cannot meet the high power demand when the amount of atmospheric sol is large, and thus cannot meet the taste demand for higher power. The MCU discrete component method just makes up for this problem. The output power is large enough and the load resistance has a wide compatibility range. It can well meet the taste requirements of large amounts of sol and high power, but the price is much higher than that of the integrated microphone. , and the circuit complexity is much greater, and the circuit occupies a larger area. To sum up, the shortcomings of current electronic atomization devices include:

1. The output power of the integrated microphone changes significantly as the load resistance decreases, and the suction taste varies greatly.

2. The maximum output power of the integrated microphone is limited and cannot meet the demand for larger power.

3. The charging current of the integrated microphone is too small and cannot meet the charging needs of large-capacity batteries.

4. MCU discrete component circuits have higher cost and larger size.

Therefore, it is very meaningful to find a control method that has less impact on the taste of atomization, has lower cost, smaller size, and larger current charging to be applied to electronic atomization devices. This application is based on low cost, small size, large output power, and large charging current. While solving the above electronic defects, it can also greatly improve the user experience and taste experience.

Specifically, as shown in FIG. 2 , the electronic atomization device includes: an integrated microphone circuit 110 , a microphone power amplifier circuit 120 and a detection feedback circuit 130 . The microphone power amplifier circuit 120 includes a power amplifier MOS transistor, a drive MOS transistor and a bias resistor for power amplification output. The detection feedback circuit 130 is composed of a negative feedback diode and is used to monitor the short circuit or open circuit of the atomizer in real time. The integrated microphone circuit 110 is used to detect suction negative pressure in real time, output PWM signals, process short circuit or open circuit signals, and charge with small current.

Among them, the detection feedback circuit 130 detects that the resistance of the loaded atomizer decreases. When the load increases, a constant voltage output is performed through the microphone power amplifier circuit 120 to compensate for the taste and maintain the improvement of the suction taste and atomization amount. There will be no attenuation of the output voltage due to increased load. In applications where the power demand of the atomizer is increased, the increase in output power through the power amplifier circuit 120 can fully meet the power demand of the atomizer to ensure the improvement of atomization taste and atomization amount, without Power mismatch results in the inability to produce atomization or insufficient output power, which affects the taste and atomization amount.

The microphone power amplifier circuit 120 uses few components, has a simple circuit and has low cost. It only requires one power MOS tube, one driving MOS tube and two bias resistors to form a high-power output. The microphone power amplifier circuit 120 ensures improved performance while occupying a smaller circuit size. In addition, the microphone power amplifier circuit 120 adopts a non-inverting amplifier circuit, and the value of the input resistance of the non-inverting amplifier does not affect the input impedance, so the adjustment can be performed more accurately.

Furthermore, the electronic atomization device also includes a synchronous charging module 150. The synchronous charging module 150 is used to expand the charging current to increase the charging current to ensure fast charging of large-capacity batteries and improve user experience. The following is an example combining the two solutions.

Solution 1: Integrated microphone module power amplification solution:

As shown in FIG. 2 , the voltage of the power module 140 is applied to the integrated microphone circuit 110 and the microphone power amplifier circuit 120 at the same time to provide power supply to each module circuit.

The integrated microphone circuit 110 adopts an integrated microphone, and its functions include low current charging management, LED display, negative pressure detection sensor, low power PWM output, load short circuit detection and load open circuit detection. The integrated microphone itself is a complete electronic atomization control module with small charging current and low output power. When atomization is required, when the negative pressure detection sensor detects the negative pressure of suction, the internal low-power PWM circuit is started to work and a low-power PWM signal is output. When it detects that the charging signal is connected, the internal small current charging management current work is automatically started to charge the battery cell with a small current.

In electronic atomization applications that require large amounts of aerosol and high power output, the microphone power amplifier circuit 120 is the main power output unit. Its entire working principle is as follows: When atomization is required, the suction negative pressure starts the integrated microphone. Work. The integrated microphone outputs a PWM signal to start the drive control switch of the in-phase power amplifier circuit. The drive control switch is in a cut-off state when there is no PWM signal, and starts to conduct when there is a PWM signal to start the power amplification control switch. The power amplification control switch is in a cut-off state when there is no driving PWM signal, and starts to conduct when there is a driving PWM signal, outputting high-power PWM current to the atomizer and starting atomization. When it is detected that the charging signal is connected, the charging circuit of the integrated microphone and the external synchronous charging module 150 are started to work at the same time to achieve the purpose of high current charging.

The implementation of the microphone power amplifier circuit of the electronic atomization device is as follows: As shown in Figure 3, MIC1 is an integrated microphone. After its negative pressure detection sensor detects the negative pressure from suction, it starts the internal low-power PWM circuit to work. , output PWM signal from pin 4. After the PWM signal is current-limited by the current-limiting resistor R1, it reaches the G pole of the driving MOS transistor Q1, and the driving MOS transistor Q1 begins to conduct. R2 is a pull-down bias resistor to ensure that the driving MOS tube Q1 is in a cut-off state when there is no PWM signal. After the driving MOS tube Q1 is turned on, it drives the G pole of the power amplifier MOS tube Q2. At this time, the power amplifier MOS tube Q2 begins to turn on and output the PWM current after power amplification, which is output to the atomizer load through the port H+, generating high power. of atomization. R4 is the pull-up bias resistor of the power amplifier MOS transistor Q2 to ensure that the power amplifier MOS transistor Q2 is in a cut-off state when there is no PWM drive signal. D1 is the negative feedback diode in the load short circuit/open circuit state. When the load atomizer is short circuit or open circuit, the signal is negatively fed back to the integrated microphone MIC1 through the negative feedback diode D1, and the integrated microphone MIC1 makes a short circuit or open circuit. After the open circuit is determined, the PWM signal output of pin 4 is turned off to ensure the safety of the circuit. Among them, the driving MOS tube Q1 can be replaced by a triode, a switching tube or an optocoupler, and the power amplifier MOS tube Q2 can be replaced by a triode, a switching tube or a thyristor.

Solution 2: ASC integrated chip microphone power amplification solution:

As shown in FIG. 4 , the voltage of the power module 140 is applied to the integrated microphone circuit 110 and the microphone power amplifier circuit 120 at the same time to provide power supply to each module circuit.

The integrated microphone circuit 110 uses an ASC integrated chip, and its functions include low current charging management, LED display, key ignition start detection, low power PWM output, load short circuit detection and load open circuit detection. The ASC integrated chip itself is a complete electronic atomization control module with small charging current and low output power. When atomization is required, when the key ignition start input port detects a change in key voltage, the internal low-power PWM circuit is started to work and a low-power PWM signal is output. When it detects that the charging signal is connected, the internal small current charging management current work is automatically started to charge the battery cell with a small current.

In electronic atomization applications that require large amounts of aerosol and high power output, the microphone power amplifier circuit 120 is the main power output unit. Its entire working principle is as follows: when atomization is required, the button detection port detects a voltage change and starts ASC integrated chip works. The ASC integrated chip outputs a PWM signal to start the drive control switch of the ASC integrated chip power amplifier circuit. The drive control switch is in a cut-off state when there is no PWM signal, and starts to conduct when there is a PWM signal to start the power amplification control switch. The power amplification control switch is in a cut-off state when there is no driving PWM signal, and starts to conduct when there is a driving PWM signal, outputting high-power PWM current to the atomizer and starting atomization. When it is detected that the charging signal is connected, the charging circuit of the ASC integrated chip and the external synchronous charging module 150 are started at the same time to achieve the purpose of high current charging.

The implementation of the ASC integrated chip power amplifier circuit of the electronic atomization device is as follows: As shown in Figure 5, U1 is an ASC integrated chip. After its button ignition start port detects the voltage change of button K1, it starts the internal low-power PWM circuit to work. Pin 4 outputs the PWM signal. After the PWM signal is current-limited by the current-limiting resistor R1, it reaches the G pole of the driving MOS transistor Q1, and the driving MOS transistor Q1 begins to conduct. R2 is a pull-down bias resistor to ensure that the driving MOS tube Q1 is in a cut-off state when there is no PWM signal. After the driving MOS tube Q1 is turned on, it drives the G pole of the power amplifier MOS tube Q2. At this time, the power amplifier MOS tube Q2 begins to turn on and output the PWM current after power amplification, which is output to the atomizer load through the port H+, generating high power. of atomization. R4 is the pull-up bias resistor of the power amplifier MOS transistor Q2 to ensure that the power amplifier MOS transistor Q2 is in a cut-off state when there is no PWM drive signal. D1 is the negative feedback diode when the load is short-circuited/open-circuited, and R6 is the current-limiting resistor of the feedback loop. When the load atomizer is short-circuited or open-circuited, the signal is negatively fed back to the ASC integrated chip through the negative feedback diode D1. After the chip makes a short circuit or open circuit judgment, it turns off the PWM output of pin 4 to ensure the safety of the circuit. Among them, the driving MOS tube Q1 can be replaced by a triode, a switching tube or an optocoupler, and the power amplifier MOS tube Q2 can be replaced by a triode, a switching tube or a thyristor.

Through the above implementation of the microphone power amplifier circuit of the electronic atomization device, a comparison chart of load resistance and output voltage is obtained as shown in Figure 7, where curve A is the output of a traditional integrated microphone when the power is sufficient. Curve, curve B is the output curve of the microphone power amplifier circuit of this application when the power is sufficient. When the resistance of the load atomizer gradually decreases from high to high, the microphone power amplifier circuit provided by this application can effectively reduce the voltage and ensure the constant output voltage. Compared with the output method of using the integrated microphone alone, the output voltage has no attenuation. This ensures the stability of the output power.

The electronic atomization device provided by this application can solve the following problems:

1. Through the power amplification output method, the taste and taste of the atomized aerosol are improved; the consistency of the taste is maintained, even if the load resistance is reduced, the taste is not affected; the consistency of the aerosol volume is maintained, even if the load power demand increases It is large and does not affect the attenuation of aerosol volume.

2. Using a microphone power amplifier circuit, the requirements for components are lower and the quantity is small, which can save costs and reduce the cost of design materials.

3. Using a small number of components, after the power is increased, the design area of the PCB (Printed Circuit Board) is much smaller than that of the MCU discrete components, and the overall volume becomes smaller, which is conducive to high-power electronic atomization. Miniaturized design of the device.

4. By improving the taste, retaining the consistency of the taste, reducing the volume and increasing the charging current, the user experience of high-power electronic atomization devices can be greatly improved.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims (14)

An electronic atomization device, characterized in that it includes an integrated microphone circuit and a microphone power amplifier circuit, the integrated microphone circuit is connected to the microphone power amplifier circuit, and the microphone power amplifier circuit is used to connect a load, The integrated microphone circuit is used to provide constant voltage output power to the load through the microphone power amplifier circuit. The electronic atomization device according to claim 1, further comprising a detection feedback circuit connected to the integrated microphone circuit and the load for detecting the status of the load and providing feedback The status detection signal is sent to the integrated microphone circuit; when the integrated microphone circuit determines that the resistance of the load decreases according to the status detection signal, it performs a constant voltage output through the microphone power amplifier circuit. The electronic atomization device according to claim 2, wherein the integrated microphone circuit is further configured to stop supplying power to the load when it is determined that the load is short-circuited or open-circuited according to the status detection signal. The electronic atomization device according to claim 2, characterized in that the detection feedback circuit includes a negative feedback diode, the cathode of the negative feedback diode is connected to the load, and the anode of the negative feedback diode is connected to the integrated microphone. header circuit. The electronic atomization device according to claim 1, characterized in that the microphone power amplifier circuit is a non-phase power amplifier circuit. The electronic atomization device according to claim 5, wherein the integrated microphone circuit includes an integrated microphone. The electronic atomization device according to claim 5, characterized in that the in-phase power amplification circuit includes a drive control switch, a power amplification control switch, a first bias resistor and a second bias resistor, and the drive control switch The control end is connected to the integrated microphone circuit, the first end of the drive control switch is connected to the control end of the power amplification control switch, and the control end of the drive control switch is connected to the drive through the first bias resistor. The second end of the control switch, the second end of the drive control switch is connected to ground; the control end of the power amplification control switch is connected to the first end of the power amplification control switch through the second bias resistor, and the power The first end of the amplification control switch is connected to the power end, and the second end of the power amplification control switch is connected to the load. The electronic atomization device according to claim 7, characterized in that the drive control switch is a MOS tube, a triode, a switching tube or a photoelectric coupling device. The electronic atomization device according to claim 7, characterized in that the power amplification control switch is a MOS tube, a triode, a switching tube or a thyristor. The electronic atomization device according to claim 1, characterized in that the microphone power amplifier circuit is an ASC integrated chip power amplifier circuit. The electronic atomization device according to claim 10, characterized in that the integrated microphone circuit includes an ASC integrated chip. The electronic atomization device according to claim 10, further comprising a button connected to the integrated microphone circuit. The electronic atomization device according to any one of claims 1 to 12, further comprising a power module connected to the integrated microphone circuit and the microphone power amplifier circuit. The electronic atomization device according to claim 13, further comprising a synchronous charging module connected to the integrated microphone circuit and the power module; the integrated microphone circuit is also used to When the charging signal is received, the internal charging circuit and the synchronous charging module are started at the same time to quickly charge the power module.

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