CN215612706U

CN215612706U - PWM ultrasonic drive single-chip and atomizing device

Info

Publication number: CN215612706U
Application number: CN202121271048.8U
Authority: CN
Inventors: 胡渊; 覃华新; 冯勇奇
Original assignee: Fuman Microelectronics Group Co ltd
Current assignee: Fuman Microelectronics Group Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-01-25
Anticipated expiration: 2031-06-07

Abstract

The utility model provides a PWM ultrasonic drive single chip and an atomization device, wherein the chip comprises a main control module, a trigger detection module, a PWM output module and a timing module which are respectively connected with the main control module; the trigger detection module is suitable for being connected with an external electronic component and used for acquiring a power signal generated based on the electronic component and generating a trigger signal according to the power signal; the PWM output module is suitable for being connected with an external atomization assembly and is used for outputting a PWM signal to drive the atomization assembly; the timing module is configured to perform timing processing based on preset timing logic; the main control module is configured to control the PWM output module according to the trigger signal and the timing processing result. The chip can realize multiple functions, when the chip is applied, a peripheral circuit does not need to be provided with too many electronic components, the cost of peripherally arranging the electronic components is reduced, and the size is small.

Description

PWM ultrasonic drive single-chip and atomizing device

Technical Field

The utility model relates to the technical field of integrated circuits, in particular to a PWM ultrasonic drive single chip and an atomization device.

Background

The water replenishing instrument is an instrument for atomizing liquid, and has various applications in the market, for example, water can be atomized to increase air humidity or replenish water for human horny layers, and medicines can be atomized to enter respiratory tracts and lung for deposition in a respiratory inhalation mode.

At present, the moisturizing appearance generally all includes the atomizing piece, and the atomizing piece can be through high frequency oscillation with liquid atomization, and on liquid atomization's basis, moisturizing appearance on the market still includes basic functions such as battery charging, instrument state instruction, work timing usually, and for satisfying these basic functions, each manufacturer will be used for realizing a plurality of chips of each basic function and make up usually to satisfy user's demand. Although the function of moisturizing appearance on the market is more, however, owing to adopt a plurality of chips to make up, need install each chip in the circuit board when actual production for the process of production is comparatively complicated, simultaneously, also needs the multiple chip of purchase, and this is obviously unfavorable for the cost management and control of firm, and simultaneously, the mode of a plurality of chip combinations also can make the volume of circuit board great, and in the miniaturized society of electronic equipment, the moisturizing appearance that adopts this kind of mode also does not benefit to the product and promotes.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention is to provide a PWM ultrasonic driving single chip and an atomizer, which are low in cost and small in size.

In a first aspect, a PWM ultrasonic driving single chip comprises a main control module, and a trigger detection module, a PWM output module and a timing module respectively connected to the main control module;

the trigger detection module is suitable for being connected with an external electronic component and used for acquiring a power signal generated based on the electronic component and generating a trigger signal according to the power signal;

the PWM output module is suitable for being connected with an external atomization assembly and is used for outputting a PWM signal to drive the atomization assembly;

the timing module is configured to perform timing processing based on preset timing logic;

the main control module is configured to control the PWM output module according to the trigger signal and the timing processing result.

Preferably, the PWM ultrasonic driving single chip further comprises an LED control module connected to the main control module; the LED control module is used for connecting an external light emitting diode and driving the light emitting diode;

the main control module is also configured to control the LED control module to drive the light emitting diode.

Preferably, the trigger detection module includes at least one of a current detector and a voltage detector.

Preferably, the trigger detection module comprises:

the power detection unit is connected with the electronic component and used for acquiring a first power signal of the electronic component;

the time delay unit is connected with the power detection unit and is configured to start timing when the first power signal is first preset power and control the power detection unit to generate a second power signal after timing is finished;

and the trigger unit is connected with the power detection unit and the time delay unit respectively and is configured to generate a trigger signal when the second power signal is second preset power.

Preferably, the timing module comprises:

a signal receiving unit adapted to be connected to an external peripheral circuit, the signal receiving unit being configured to detect a level signal of the peripheral circuit;

and the timing unit is suitable for being connected with the signal receiving unit, performs timing processing on the basis of the level signal, and sends a timing processing result to the main control module.

Preferably, the charging and discharging system further comprises a charging and discharging module, wherein the charging and discharging module is connected with the main control module;

the charging and discharging module is suitable for being connected with an external energy storage device, and the energy storage device, the charging and discharging module and the main control module form a discharging loop for discharging the energy storage device;

the charging and discharging module is suitable for being respectively connected with the energy storage device and an external charging device, and the charging device, the charging and discharging module and the energy storage device form a charging loop for charging the energy storage device.

Preferably, the charging and discharging module is further adapted to be connected to a charging device and transmit electric energy input by the charging device to the main control module.

Preferably, the charge and discharge module further includes:

the first detection unit is suitable for being connected with the energy storage device and/or the charging device and is suitable for detecting charging loop parameters of the charging loop;

and the first switch unit is connected with the first detection unit and is configured to control the on-off of the charging loop based on the charging loop parameter.

Preferably, the charge and discharge module further includes:

the second detection unit is suitable for being connected with the energy storage device and is suitable for detecting the discharge loop parameters of the discharge loop;

and the second switch unit is connected with the second detection unit and is configured to control the on-off of the discharge loop based on the discharge loop parameter.

In a second aspect, an atomization device includes the PWM ultrasonic driving single chip provided in the first aspect and an atomization component connected with the PWM ultrasonic driving single chip.

The PWM ultrasonic drive single chip and the atomization device provided by the utility model can realize multiple functions, and when the chip is applied, a peripheral circuit does not need to be provided with too many electronic components, so that the cost of peripherally arranging the electronic components is reduced, and the size is small.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a PWM ultrasonic driving single chip according to an embodiment of the present invention.

Fig. 2 is a schematic packaging diagram of a PWM ultrasonic driving single chip according to an embodiment of the present invention.

Fig. 3 is a schematic view of an atomization device provided in an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

The first embodiment is as follows:

referring to fig. 1, a PWM ultrasonic driving single chip 100 may include a main control module 11, and a trigger detection module 12, a PWM output module 13 and a timing module 14 respectively connected to the main control module 11. The trigger detection module 12 is adapted to be connected to an external electronic component 500, and the trigger detection module 12 is configured to obtain an electric power signal generated based on the electronic component 500 and generate a trigger signal according to the electric power signal. The PWM output module 13 is adapted to be connected to the external atomizing assembly 200, and the PWM output module 13 is used for outputting a PWM signal to drive the atomizing assembly 200. The timing module 14 is configured to perform timing processing based on preset timing logic. The main control module 11 is configured to control the PWM output module 13 according to the trigger signal and the result of the timing process.

It should be noted that the "external atomizing component" described in the present embodiment is "external" with respect to the PWM ultrasonic-driven single chip, and is not "external" to the carrier on which the PWM ultrasonic-driven single chip is disposed. Similarly, the following "external charging device" is "external" to the PWM ultrasonic wave driving single chip, and is not limited to a specific position of the "external charging device". Similarly, the present embodiment is similarly applicable to the following external energy storage device, external peripheral circuit, external electronic component, and the like.

In the present embodiment, the atomizing assembly 200 may include an atomizing plate, and the type of the atomizing plate may be a microporous atomizing plate, a ceramic atomizing plate, etc., and the type of the atomizing plate is not particularly limited herein. In addition, the atomizing assembly 200 may further include a power switch tube, which may be connected to the atomizing plate. The power switch tube can be an NPN type switch tube, a PNP type switch tube and the like, and in practical application, a manufacturer can determine the connection relation between the atomizing sheet and the power switch tube based on the type of the power switch tube.

In this embodiment, the trigger detection module 12 may be configured to determine whether an external operation is valid, and the type of the trigger detection module 12 may be consistent with the external electronic component 500. For example, when the electronic component 500 is a conventional key switch, the power signal may be at a high level or a low level; when the electronic component 500 is a pulse switch button, the power signal may be a rising edge and a falling edge of a pulse; when the electronic component 500 is a pneumatic switch, the power signal may be a current, a voltage, a capacitance, or the like.

Additionally, in some embodiments, the logic for the trigger detection module 12 to generate the trigger signal based on the power signal may also be consistent with the external electronic component 500. For example, when the electronic component 500 is a pulse switch button and the power signal is a pulse, it may be determined whether an external operation is valid based on a direction of a rising edge and/or a falling edge of the pulse, and if the external operation is valid, a trigger signal is generated; if not, no trigger signal is generated. When the electronic component 500 is a pneumatic switch and the power signal may be a current, whether an external operation is valid may be determined based on the magnitude of the current, and if so, a trigger signal is generated; if not, no trigger signal is generated.

Further, in some embodiments, the trigger signal may include a signal controlling the PWM output module 13 to stop outputting the PWM signal, and a signal controlling the PWM output module 13 to output the PWM signal. That is, whether the PWM ultrasonic-wave driving single chip 100 outputs a PWM signal may be controlled by the trigger signal generated by the trigger detection module 12 to determine whether to drive the atomization assembly 200.

In this embodiment, the timing module 14 may preset a timing logic, and the timing logic may include: when to start timing, a timed duration, etc.

In some embodiments, the timing logic of timing module 14 may include: the timing of starting timing is determined according to the time when the main control module 11 receives the trigger signal, the timing of starting timing is determined according to the time when the trigger detection module 12 generates the trigger signal, the timing of starting timing is determined according to the time when the main control module 11 outputs the PWM signal, and the like, and the manner of determining the timing of starting timing by the timing logic is not particularly limited herein. When the timing module 14 determines to start timing, that is, start synchronous start timing processing, when the timing duration reaches a preset timing threshold, the timing module 14 may send a signal for representing that the PWM signal is suspended to be output to the main control module 11, when the main control module 11 receives the signal, the PWM output module 13 is controlled to suspend outputting the PWM signal, the timing module 14 may also send a signal for representing that the PWM signal is started to be output to the main control module 11, and when the main control module 11 receives the signal, the PWM output module 13 is controlled to suspend outputting the PWM signal.

In this embodiment, based on the above control, the main control module 11 may control whether the PWM output module 13 outputs the PWM signal based on the trigger signal and the result of the timing process of the timing module 14, so as to drive the atomizing assembly 200.

In this embodiment, through adopting the PWM drive single-chip including host system 11, trigger detection module 12, PWM output module 13 and timing module 14, can use this chip to drive atomization component 200, and need not to adopt a plurality of chips to make up, effectively reduced the quantity of arranging the chip, simultaneously when the chip is used, peripheral circuit need not to set up too much electronic components 500, has reduced the peripheral cost of arranging electronic components 500, and is small. In addition, when the manufacturer uses the PWM ultrasonic driving single chip 100 provided by this embodiment, the manufacturer can set the type and duty ratio of the power switch tube as required based on the working power requirement of the atomizing plate, and control the working power from the PWM signal output by the PWM output module 13 to the atomizing plate, thereby improving the diversity of the manufacturer using the PWM ultrasonic driving single chip 100 provided by this embodiment.

In this embodiment, the trigger detection module 12 may include at least one of a current detector and a voltage detector. The choice of current and voltage detectors in the trigger detection module 12 may be determined based on actual requirements. For example, when the external electronic component 500 is a conventional key switch, the trigger detection module 12 may be a voltage detector; when the external electronic component 500 is a pneumatic switch, the trigger detection module 12 may be a current detector.

It should be noted that the current detector may include a device capable of detecting the current of the external electronic component 500, and the type, model, and circuit structure of the device are not particularly limited; the voltage detector may include a device capable of detecting the voltage of the external electronic component 500, and the type, model, and circuit configuration of the device are not particularly limited.

In this embodiment, the electronic component 500 may further include a power detection unit, a delay unit, and a trigger unit. The power detection unit is connected to the electronic component 500 and is configured to collect a first power signal of the electronic component 500. And the time delay unit is connected with the power detection unit and is configured to start timing when the first power signal is the first preset power and control the power detection unit to generate the second power signal after the timing is finished. And the trigger unit is connected with the power detection unit and the time delay unit respectively and is configured to generate a trigger signal when the second power signal is second preset power.

In order to more clearly describe the operation of the power detection unit, the delay unit and the trigger unit, the following examples are listed:

assuming that the external electronic component 500 is a conventional switch/key, the conditions for determining that the external operation is valid are: the time period for which the external electronic component 500 is pressed is greater than or equal to the preset timing duration. When a user presses the external electronic component 500, the power detection unit detects a high level signal, at this time, the delay unit starts timing, the power detection unit is controlled to detect again after timing (timing duration may be preset, for example, 20ms, 30ms, and the like) is finished, when a result of the re-detection is a high level signal, it is determined that the pressing duration of the external electronic component 500 is greater than or equal to the timing duration, it is determined that the external operation is valid, and the trigger unit generates a trigger signal. When the retest result is a low level signal, if it is determined that the pressing time of the external electronic component 500 is shorter than the timing time, it is determined that the external operation is invalid, and the trigger unit does not generate a trigger signal.

In this embodiment, the PWM ultrasonic driving single chip 100 may further include a charging and discharging module 16, and the charging and discharging module 16 is connected to the main control module 11. The charge and discharge module 16 is adapted to be connected to an external energy storage device 300, and the energy storage device 300, the charge and discharge module 16, and the main control module 11 form a discharge loop for discharging the energy storage device 300. The charge-discharge module 16 is adapted to be connected to the energy storage device 300 and an external charging device 400, respectively, and the charging device 400, the charge-discharge module 16, and the energy storage device 300 form a charging loop for charging the energy storage device 300.

In this embodiment, the charging and discharging module 16 is further adapted to be connected to an external charging device 400, and transmit the electric energy input by the charging device 400 to the main control module 11.

In some embodiments, the charge-discharge module 16 may be separately connected to the external charging device 400, and the charge-discharge module 16 may receive power from the external charging device 400, so as to provide power to each circuit of the whole chip. The charge-discharge module 16 may be simultaneously connected to an external energy storage device 300 (for example, various types of batteries) and a charging device 400 (for example, various types of chargers), and may transmit power received from the charging device 400 to the external energy storage device 300 to charge the external energy storage device 300. The charge-discharge module 16 may be connected to an external energy storage device 300, and the external energy storage device 300 provides power to each circuit of the whole chip.

In the present embodiment, the timing module 14 may include a signal receiving unit and a timing unit. The signal receiving unit is suitable for being connected with an external peripheral circuit and is configured to detect a level signal of the peripheral circuit. And the timing unit is suitable for being connected with the signal receiving unit, performs timing processing based on the level signal, and sends a timing processing result to the main control module 11.

In the present embodiment, the peripheral circuit may be a circuit that provides a timing standard of the timing module 14, and thus the signal receiving unit may determine the timing standard in terms of a current, a voltage, and the like of the peripheral circuit. For example, the preset timing logic is: and when receiving the low level signal, determining the timing duration as a second duration. When the signal receiving unit receives the high level signal, the timing unit performs timing based on the first time length, and sends a signal to the main control module 11 after timing, so that the main control module 11 controls the PWM output module to output a PWM signal. When the signal receiving unit receives the low level signal, the timing unit performs timing based on the second duration, and sends a signal to the main control module 11 after timing, so that the main control module 11 controls the PWM output module to output a PWM signal.

It should be noted that the first duration and the second duration are set based on requirements, and the level signal may be a level signal of a single branch in the peripheral circuit, or a level signal formed by combining a plurality of single branches. When the level signal is a level signal formed by combining a plurality of single branches, more types of time duration can be set, so that more timing options are brought.

In this embodiment, the charging and discharging module 16 may further include: a first detection unit and a first switch unit. Wherein, the first detection unit is adapted to be connected to the energy storage device 300 and/or the charging device 400, and the first detection unit is adapted to detect a charging loop parameter of the charging loop. And the first switch unit is connected with the first detection unit and is configured to control the on-off of the charging loop based on the charging loop parameter.

In this embodiment, the charge and discharge module 16 may further include a second detection unit and a second switching unit.

And a second detection unit, adapted to be connected to the external energy storage device 300, and adapted to detect a discharge loop parameter of the discharge loop. And the second switch unit is connected with the second detection unit and is configured to control the on-off of the discharge loop based on the discharge loop parameter.

Specifically, the charging and discharging module 16 may further detect loop parameters of the charging loop and the discharging loop, and control on/off of the charging loop and the discharging loop according to a detection result. For example, when the battery is detected to be in overcharge, overdischarge or short circuit, the control switch switches the loop of the battery.

The first detection unit and the second detection unit may be integrated circuits or separated circuits, and the first switch unit and the second switch unit may also be integrated circuits or separated circuits, where the connection relationship among the first detection unit, the second detection unit, the first switch unit, and the second switch unit is not particularly limited.

In this embodiment, the PWM ultrasonic drive single chip 100 may further include an LED control module 15 connected to the main control module 11; the LED control module 15 is used to connect an external light emitting diode 600 and drive the light emitting diode 600. The main control module 11 is further configured to control the LED control module 15 to drive the light emitting diode 600.

In some embodiments, the number of the light emitting diodes 600 may be one, or may be multiple, and the number of the light emitting diodes 600 that can be driven by the LED control module 15 is not particularly limited. The light emitting color of the light emitting diode may be blue, red, green, etc., and the light emitting color of the light emitting diode 600 that can be driven by the LED control module 15 is not particularly limited.

Specifically, the LED control module 15 may receive an LED control signal of the main control module 11 and control the light emitting diode 600 according to the LED control signal. The main control module 11 may determine the LED control signal based on the corresponding relationship between the operating state of each circuit and the LED control signal, and send the LED control signal to the LED control module 15 to control the light emitting diode 600.

In some embodiments, the main control module 11 may determine a connection status with the charging device 400 through the charging and discharging module 16, and when the connection status is detected, send an LED control signal for controlling a certain LED to light to the main control module 11. Also, for example, when the main control module 11 outputs a PWM signal, an LED control signal for controlling another LED to be turned on may be transmitted to the main control module 11.

Example two:

in the present embodiment, a PWM ultrasonic driving single chip 100 is provided based on the first embodiment, please refer to fig. 2, which includes a KEY pin, a TIME pin, a PH pin, a main control module 11, and a trigger detection module 12, a PWM output module 13, and a timing module 14 respectively connected to the main control module 11. The KEY pin is connected to the external electronic component 500, the TIME pin receives timing logic entered by a user, and the PH pin is connected to the external switching tube. The trigger detection module 12 is configured to obtain a state of the external electronic component 500, generate trigger information, and transmit the trigger information to the main control module 11; the main control module 11 is used for controlling the PWM output module 13 to output a PWM signal according to the trigger information, and driving the external switching tube. The timing module 14 is configured to perform timing according to a timing logic after being started.

In some embodiments, the PWM ultrasonic driving single chip 100 may further include a VCC pin, a BAT + pin, and a GND pin, and the charging and discharging module 16 is connected to the main control module 11 respectively. The charge-discharge module 16 is used for connecting the external charging device 400 and the external energy storage device 300; the external charging device 400 is used to supply power to the PWM ultrasonic drive single chip 100. The VCC pin is connected to the positive electrode of the external charging device 400, the BAT + pin is connected to the positive electrode of the external energy storage device 300, and the GND pin is connected to the negative electrode of the external charging device 400 or the negative electrode of the external energy storage device 300.

In some embodiments, the PWM ultrasonic driving single chip 100 may further include a CLED pin, a WLED pin, and an LED control module 15 respectively connected to the main control module 11. The CLED pin and the WLED pin are both connected to an external light emitting diode 600. The LED control module 15 is connected with an external light emitting diode 600; the main control module 11 is used for controlling the LED control module 15 to drive the external light emitting diode 600.

In some embodiments, the VCC pin of the PWM ultrasonic driving single chip 100 may be connected to the positive electrode of the USB interface, and the USB interface provides an external power source. The BAT + pin may be connected to the positive electrode of the battery, the GND pin may be connected to the negative electrode of the USB interface/the negative electrode of the battery, the KEY pin may be regarded as an entry for acquiring a status signal of the external electronic component 500, the TIME pin may be regarded as an interface for determining timing logic, the CLED pin and the WLED pin may be regarded as an interface for the LED control module 15 to output a signal for controlling the external light emitting diode 600, and the PH pin may be regarded as an interface for the main control module 11 to output a PWM signal.

Specifically, the PWM ultrasonic driving single chip 100 is packaged, and the VCC pin of the PWM ultrasonic driving single chip 100 can be connected to the positive electrode of the USB interface, and the USB interface (the charging device 400) provides an external power supply. The BAT + pin may be connected to the positive electrode of the battery, the GND pin may be connected to the negative electrode of the USB interface/the negative electrode of the battery, the KEY pin may be regarded as an entry for acquiring a status signal of the external electronic component 500, the TIME pin may be regarded as an interface for receiving timing logic, the CLED pin and the WLED pin may be regarded as an interface for the LED control module 15 to output a signal for controlling the light emitting diode 600, and the PH pin may be regarded as an interface for the main control module 11 to output a PWM signal.

It should be noted that the operation principle of the PWM ultrasonic driving single chip 100 provided in the second embodiment is consistent with the operation principle of the PWM ultrasonic driving single chip 100 provided in the first embodiment, the second embodiment is only a description of a packaging manner of the PWM ultrasonic driving single chip 100 provided in the first embodiment, and the operation principle of the PWM ultrasonic driving single chip 100 provided in the second embodiment is not traced here, and specific reference may be made to the content of the first embodiment.

Example three:

referring to fig. 3, an atomizing device 1000 may include the PWM ultrasonic driving single chip 100 of the above embodiment and an atomizing element 200 connected to the PWM ultrasonic driving single chip 100.

In some embodiments, the aerosolization apparatus 1000 can be used in a hydration meter, humidifier, e-cigarette, medical vaporizer, or the like.

For a brief description of the products provided by the embodiments of the present invention, reference may be made to the corresponding contents in the foregoing embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. A PWM ultrasonic drive single chip is characterized by comprising a main control module, a trigger detection module, a PWM output module and a timing module, wherein the trigger detection module, the PWM output module and the timing module are respectively connected with the main control module;

the master control module is configured to control the PWM output module according to the trigger signal and the result of the timing processing.

2. The PWM ultrasonic drive single chip of claim 1, further comprising an LED control module connected to the main control module; the LED control module is used for connecting an external light emitting diode and driving the light emitting diode;

3. The PWM ultrasonic driving single chip according to claim 1, wherein the trigger detection module comprises at least one of a current detector and a voltage detector.

4. The PWM ultrasonic driving single chip according to claim 1, wherein the trigger detection module comprises:

the power detection unit is connected with the electronic component and used for collecting a first power signal of the electronic component;

a trigger unit connected to the power detection unit and the delay unit, respectively, and configured to generate the trigger signal when the second power signal is a second preset power.

5. The PWM ultrasonic drive single chip according to claim 1, wherein the timing module comprises:

6. The PWM ultrasonic drive single chip of claim 1, further comprising a charge-discharge module, wherein the charge-discharge module is connected with the main control module;

the charging and discharging module is suitable for being connected with an external energy storage device, and the energy storage device, the charging and discharging module and the main control module form a discharging loop for discharging of the energy storage device;

the charging and discharging module is suitable for being connected with the energy storage device and an external charging device respectively, and the charging device, the charging and discharging module and the energy storage device form a charging loop for charging the energy storage device.

7. The PWM ultrasonic drive single chip of claim 6, wherein the charge-discharge module is further adapted to be connected to the charging device and transmit the electric energy input by the charging device to the main control module.

8. The PWM ultrasonic drive single chip of claim 6, wherein the charge-discharge module further comprises:

the first switch unit is connected with the first detection unit and is configured to control the on-off of the charging loop based on the charging loop parameter.

9. The PWM ultrasonic drive single chip of claim 6, wherein the charge-discharge module further comprises:

a second switch unit connected with the second detection unit, the second switch unit being configured to control on/off of the discharge loop based on the discharge loop parameter.

10. An atomizer, comprising the PWM ultrasonic driving single chip according to any one of claims 1 to 9 and the atomizer connected to the PWM ultrasonic driving single chip.