阅读说明：本技术 多档位恒功率输出装置 (Multi-gear constant power output device ) 是由 严大志 王海元 晏响玲 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种多档位恒功率输出装置,包括用于输出不同功率的电压电源的功率转换模块,以及电连接于所述功率转换模块的电压反馈模块,功率转换模块的输入端连接电池,输出端连接负载,所述电压反馈模块用于发送反馈电压给功率转换模块,功率转换模块接收到反馈电压,将电池电压转换为对应大小的输出电压。本方案的功率转换模块同时具备升压和降压功能,能够根据电压反馈模块的反馈电压调整输出电压大小,实现对于输出电压的恒压稳定控制；同时,通过一次升压或降压即可直接得到目标值的输出电压,无需对输入电压进行先升压后再降压,单次完成转换,提高转换效率。(The invention discloses a multi-gear constant power output device which comprises a power conversion module and a voltage feedback module, wherein the power conversion module is used for outputting voltage power supplies with different powers, the voltage feedback module is electrically connected with the power conversion module, the input end of the power conversion module is connected with a battery, the output end of the power conversion module is connected with a load, the voltage feedback module is used for sending feedback voltage to the power conversion module, and the power conversion module receives the feedback voltage and converts the voltage of the battery into output voltage with corresponding magnitude. The power conversion module has the functions of boosting and reducing voltage, and can adjust the output voltage according to the feedback voltage of the voltage feedback module, so that the constant voltage stable control of the output voltage is realized; meanwhile, the output voltage of the target value can be directly obtained through one-time voltage boosting or voltage reduction, the input voltage does not need to be boosted and then reduced, conversion is completed once, and the conversion efficiency is improved.)

1. The multi-gear constant power output device is characterized by comprising a power conversion module and a voltage feedback module, wherein the power conversion module is used for outputting voltage power supplies with different powers, the voltage feedback module is electrically connected with the power conversion module, the input end of the power conversion module is connected with a battery, the output end of the power conversion module is connected with a load, the voltage feedback module is used for sending feedback voltage to the power conversion module, and the power conversion module receives the feedback voltage and converts the voltage of the battery into output voltage with corresponding magnitude.

2. The multi-gear constant power output device according to claim 1, further comprising an input filter module connected to the power conversion module, wherein an input end of the input filter module is connected to the battery, and an output end of the input filter module is connected to the input end of the power conversion module.

3. The multi-gear constant power output device according to claim 2, further comprising a switch module connected to the power conversion module, wherein the switch module is configured to control output state switching of the power conversion module according to a level signal.

4. The multi-gear constant power output device according to claim 3, further comprising an output filter module connected to the power conversion module, wherein an input of the output filter module is connected to an output of the power conversion module, and is configured to output an output voltage to a corresponding load after filtering.

5. The multi-tap constant power output device according to any one of claims 1-4, wherein the power conversion module is a chip U2, and the model of the chip U2 is mp 28064.

6. The multi-gear constant power output device according to claim 5, wherein the input filter module comprises an input filter capacitor C13, one end of the input filter capacitor C13 is connected to the output terminal of the battery and the VIN pin of the chip U2, and the other end is connected to ground.

7. The multi-gear constant power output device according to claim 5, wherein the power conversion module further comprises an energy storage inductor L1 for storing energy during voltage boosting or voltage dropping, one end of the energy storage inductor L1 is connected to the SW1 pin of the U2, and the other end is connected to the SW2 pin of the U2.

8. The multi-gear constant power output device according to claim 5, wherein the voltage feedback module comprises a resistor R11 and a plurality of feedback sub-modules, a first end of the resistor R11 is connected to the Vout pin of the chip U2, a second end of the resistor R11 is connected to the FB pin of the chip U2 and the first end of the feedback sub-modules, and a second end of the feedback sub-modules is grounded.

9. The multi-gear constant power output device according to claim 8, wherein the feedback sub-modules include a first feedback sub-module, a second feedback sub-module, and a third feedback sub-module;

The first feedback submodule comprises resistors R13 and R14 and a mos transistor Q3, the first end of the resistor R14 is connected with the second end of the resistor R11, the second end of the resistor R14 is connected with the drain electrode of the mos transistor Q3, the gate electrode of the mos transistor Q3 is connected with the first end of the resistor R13, the second end of the resistor R13 is connected with a first control level, and the source electrode of the mos transistor Q3 is grounded;

The second feedback submodule comprises resistors R15 and R16 and a mos transistor Q4, the first end of the resistor R16 is connected with the second end of the resistor R11, the second end of the resistor R16 is connected with the drain electrode of the mos transistor Q4, the gate electrode of the mos transistor Q4 is connected with the first end of the resistor R15, the second end of the resistor R15 is connected with a second control level, and the source electrode of the mos transistor Q4 is grounded;

the third feedback submodule comprises resistors R17 and R18 and a mos transistor Q5, the first end of the resistor R18 is connected with the second end of the resistor R11, the second end of the resistor R18 is connected with the drain electrode of the mos transistor Q5, the gate electrode of the mos transistor Q5 is connected with the first end of the resistor R17, the second end of the resistor R17 is connected with a third control level, and the source electrode of the mos transistor Q5 is grounded.

10. The multi-tap constant power output device according to claim 5, wherein the output filter module comprises output filter capacitors C5 and C7, first terminals of the output filter capacitors C5 and C7 are connected to the VOUT pin of the chip U2, and second terminals of the output filter capacitors are connected to ground.

Technical Field

The invention relates to a control device, in particular to a multi-gear constant power output device.

Background

The electronic atomization cigarette is small in size and portable, and becomes a new trend, meanwhile, the output voltage of the lithium battery is 3.0-4.2V, and the battery voltage is uncertain in actual use, so that when the constant voltage is output, the current battery voltage needs to be interpreted firstly, and if the current battery voltage is higher than the constant voltage output target voltage, a voltage reduction mode needs to be used; if the battery voltage is lower than the target voltage of the constant voltage output, it needs to be realized in the boost mode. Therefore, the BOOST voltage BOOST circuit and the BUCK voltage reduction circuit must be integrated on the PCBA to realize the constant voltage output of the electronic cigarette, but the electronic atomized cigarette with small volume cannot provide enough space to realize the simultaneous placement of the two circuits.

In particular, there is another solution in the art: the method is realized by firstly using a boosting circuit to boost the battery voltage to 5V and then reducing the battery voltage to a target voltage, and is simple, but also has two problems: the final efficiency is difficult to be high, specifically, the actual efficiency is the boosting efficiency and the voltage reduction efficiency is 85% and 0.72; secondly, the mode simultaneously faces the problems of multiple components, large area of the required PCB and the like.

Disclosure of Invention

the invention aims to overcome the defects of the prior art and provides a multi-gear constant-power output device.

In order to achieve the purpose, the invention adopts the following technical scheme: the multi-gear constant power output device comprises a power conversion module and a voltage feedback module, wherein the power conversion module is used for outputting voltage power supplies with different powers, the voltage feedback module is electrically connected with the power conversion module, the input end of the power conversion module is connected with a battery, the output end of the power conversion module is connected with a load, the voltage feedback module is used for sending feedback voltage to the power conversion module, and the power conversion module receives the feedback voltage and converts the voltage of the battery into output voltage with corresponding size.

The power conversion module is connected with the power conversion module, the input end of the input filtering module is connected with the battery, and the output end of the input filtering module is connected with the input end of the power conversion module.

The power conversion module is connected with the power conversion module, and the switching module is used for controlling the output state switching of the power conversion module according to the level signal.

The power conversion module is connected with the power supply, and the output end of the power conversion module is connected with the output end of the power supply.

further, the power conversion module is a chip U2, and the model of the chip U2 is mp 28064.

Further, the input filter module includes an input filter capacitor C13, one end of the input filter capacitor C13 is connected to the output terminal of the battery and the VIN pin of the chip U2, and the other end is grounded.

And further, the energy storage inductor L1 is used for storing energy in the boosting or reducing process, one end of the energy storage inductor L1 is connected with the SW1 pin of the chip U2, and the other end of the energy storage inductor L1 is connected with the SW2 pin of the chip U2.

Further, the voltage feedback module comprises a resistor R11 and a plurality of feedback sub-modules, wherein a first end of the resistor R11 is connected with the Vout pin of the chip U2, a second end of the resistor R11 is connected with the FB pin of the chip U2 and the first end of the feedback sub-modules, and the second end of the feedback sub-modules is grounded.

Further, the feedback sub-modules include a first feedback sub-module, a second feedback sub-module and a third feedback sub-module;

The first feedback submodule comprises a resistor R14 and a mos tube Q3, the first end of the resistor R14 is connected with the second end of the resistor R11, the second end of the resistor R14 is connected with the drain electrode of the mos tube Q3, the gate electrode of the mos tube Q3 is connected with a first control level, and the source electrode of the mos tube Q3 is grounded;

The second feedback submodule comprises a resistor R16 and a mos tube Q4, the first end of the resistor R16 is connected with the second end of the resistor R11, the second end of the resistor R16 is connected with the drain electrode of the mos tube Q4, the gate electrode of the mos tube Q4 is connected with a second control level, and the source electrode of the mos tube Q4 is grounded;

The third feedback submodule comprises resistors R17 and R18 and a mos transistor Q5, the first end of the resistor R18 is connected with the second end of the resistor R11, the second end of the resistor R18 is connected with the first end of the resistor R17, the second end of the resistor R17 is connected with the drain electrode of the mos transistor Q5, the gate electrode of the mos transistor Q5 is connected with a third control level, and the source electrode of the mos transistor Q5 is grounded.

Further, the output filter module comprises output filter capacitors C5 and C7, wherein first ends of the output filter capacitors C5 and C7 are connected to the VOUT pin of the chip U2, and second ends of the output filter capacitors are connected to ground.

Compared with the prior art, the invention has the beneficial effects that: the power conversion module of the multi-gear constant-power output device provided by the invention has the functions of boosting and reducing voltage, and can adjust the output voltage according to the feedback voltage of the voltage feedback module, thereby realizing the constant-voltage stable control of the output voltage; meanwhile, the output voltage of the target value can be directly obtained through one-time voltage boosting or voltage reduction, the input voltage does not need to be boosted and then reduced, conversion is completed once, and the conversion efficiency is improved.

the foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more apparent, the following detailed description will be given of preferred embodiments.

Drawings

Fig. 1 is a schematic block diagram of a multi-gear constant power output apparatus according to an embodiment of the present invention;

FIG. 2 is a block diagram of a multi-gear constant power output apparatus according to another embodiment of the present invention;

Fig. 3 is a block diagram of a voltage feedback module of a multi-gear constant power output apparatus according to another embodiment of the present invention;

Fig. 4 is a circuit connection diagram of a power conversion module of a multi-gear constant power output apparatus according to an embodiment of the present invention;

Fig. 5 is a circuit connection diagram of a voltage feedback module of a multi-gear constant power output device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 1, the present invention provides a multi-gear constant power output apparatus, including a power conversion module 20 for outputting voltage power supplies with different powers, and a voltage feedback module 30 electrically connected to the power conversion module 20, wherein an input end of the power conversion module 20 is connected to a battery 10, an output end of the power conversion module 20 is connected to a load 40, the voltage feedback module 30 is configured to send a feedback voltage to the power conversion module 20, and the power conversion module 20 receives the feedback voltage and converts the battery voltage into an output voltage with a corresponding magnitude according to the feedback voltage and outputs the output voltage to the load 40. The power conversion module 20 has both voltage boosting and voltage reducing functions, can adjust the output voltage according to the feedback voltage of the voltage feedback module 30, realizes constant voltage stable control of the output voltage, can directly obtain the output voltage of a target value through one-time voltage boosting or voltage reducing, does not need to perform voltage boosting and then voltage reducing on the input voltage (battery voltage), and improves the conversion efficiency by one-time conversion.

Referring to fig. 2-5, in another embodiment, the multi-gear constant power output apparatus of the present invention further includes an input filter module 50 connected to the power conversion module 20, a switch module 70 connected to the power conversion module 20, and an output filter module 60 connected to the power conversion module 20.

referring to fig. 4, in the present embodiment, the power conversion module 20 is a chip U2, and the model of the chip U2 is mp 28064. The Mp28064 chip is small in size, has a voltage input range of 1.2-5.5, meets the requirement of battery voltage input in a range of 3.0-4.2, integrates a BOOST circuit and a BUCK circuit, outputs an MOS (metal oxide semiconductor) transistor, and has the highest output current of 4.2A. Specifically, the BOOST and BUCK circuits are integrated in the Mp28064 chip, so that the size of the circuit board can be reduced on the premise of ensuring the BOOST/BUCK function, and the multi-stage constant power output device can be applied to small-size electronic devices, such as electronic cigarettes.

in this embodiment, the power conversion module 20 further includes an energy storage inductor L1 for storing energy during voltage boosting or voltage dropping, one end of the energy storage inductor L1 is connected to the SW1 pin of the chip U2, and the other end is connected to the SW2 pin of the chip U2. The SW1 and SW2 pins are used as PWM outputs, the energy storage inductor L1 can store energy in the process of boosting or reducing voltage, and the lower the DCR (reference direct current resistance) of the energy storage inductor L1, the better. Furthermore, the internal resistance DCR of the energy storage inductor L1 is less than 10 mr.

Specifically, the input end of the input filter module 50 is connected to the battery 10, the output end is connected to the input end of the power conversion module 20, and the input filter module 50 is configured to reduce an ac component in the input voltage and retain a dc component thereof, so that a ripple coefficient of the output voltage is reduced, and a waveform becomes smoother.

As shown in fig. 4, in the present embodiment, the input filter module 50 includes an input filter capacitor C13, one end of the input filter capacitor C13 is connected to the output terminal of the battery 10 and the Vin pin of the chip U2, and the other end is grounded. The voltage at the two ends of the input filter capacitor C13 is the input voltage of the battery 10, and the voltage range is 3.0-4.2V.

specifically, the switch module 70 is configured to control the output state switching of the power conversion module 20 according to the level signal, where the specific output state includes a voltage output state and a static standby state. When the switch module 70 is at a high level, the power conversion module 20 is in a voltage output state, and outputs an output voltage corresponding to the voltage to the load 40, and when the switch module 70 is at a low level, the power conversion module 20 is in a static standby state, and the power conversion module 20 stops working, that is, there is no voltage output. In one embodiment, the switch module 70 may be a sw-power control signal pin.

Specifically, the input end of the output filter module 60 is connected to the output end of the power conversion module 20, and is configured to output the output voltage to the corresponding load 40 after filtering, and the output filter module 60 is configured to reduce an ac component in the output voltage and retain a dc component thereof, so that a ripple coefficient of the output voltage is reduced, and a waveform becomes relatively smooth.

In the embodiment, the output filter module 60 includes output filter capacitors C5 and C7, wherein the first terminals of the output filter capacitors C5 and C7 are connected to the Vout pin of the chip U2, and the second terminals are connected to ground. The withstand voltage values of the output filter capacitors C5 and C7 are higher than the output voltage.

In one embodiment, the voltage feedback module 30 includes a resistor R11, and a plurality of feedback sub-modules, wherein a first terminal of the resistor R11 is connected to the Vout pin of the chip U2, a second terminal thereof is connected to the FB pin of the chip U2 and the first terminal of the feedback sub-modules, and the second terminal of the feedback sub-modules is grounded. The FB pin is a voltage output feedback pin, different feedback sub-modules are conducted, different resistance distributions can be matched, different voltage outputs are achieved, adjustment of the output voltage is achieved by arranging the plurality of feedback sub-modules, and adjustability of the output voltage is guaranteed.

Referring to fig. 3 and 5, in the present embodiment, the feedback sub-modules include a first feedback sub-module 31, a second feedback sub-module 32, and a third feedback sub-module 33.

The first feedback submodule 31 comprises resistors R13 and R14 and a mos transistor Q3, wherein the first terminal of the resistor R14 is connected to the second terminal of the resistor R11, the second terminal of the resistor R14 is connected to the drain of the mos transistor Q3, the gate of the mos transistor Q3 is connected to the first terminal of the resistor R13, the second terminal of the resistor R13 is connected to the first control level, and the source of the mos transistor Q3 is grounded.

the second feedback submodule 32 comprises resistors R15 and R16 and a mos transistor Q4, wherein the first end of the resistor R16 is connected with the second end of the resistor R11, the second end of the resistor R16 is connected with the drain electrode of the mos transistor Q4, the gate electrode of the mos transistor Q4 is connected with the first end of the resistor R15, the second end of the resistor R15 is connected with the second control level, and the source electrode of the mos transistor Q4 is grounded.

The third feedback sub-module 33 comprises resistors R17 and R18 and a mos transistor Q5, wherein the first terminal of the resistor R18 is connected to the second terminal of the resistor R11, the second terminal of the resistor R18 is connected to the drain of the mos transistor Q5, the gate of the mos transistor Q5 is connected to the first terminal of the resistor R17, the second terminal of the resistor R17 is connected to the third control level, and the source of the mos transistor Q5 is grounded.

In this embodiment, the apparatus of the present application outputs different voltage values according to different feedback voltages. The feedback voltage at FB is 0.5V, different Vout output voltages are realized through voltage dividing resistors (resistors R13-R18), and three MOS (metal oxide semiconductor) tubes of Q3, Q4 and Q5 are used for matching three different resistor voltage divisions to realize different outputs. For example, when the MOS transistor Q3 is turned on, the resistor R11 and the resistor R14 divide the voltage to form an output loop, and the output voltage is 0.5V/(R14/R14+ R11) and 3.93V. Therefore, according to the grad _1, the grad _2 and the grad _3, different starting combinations of the MOS transistors Q3, Q4 and Q5 can be realized by different high and low levels of the three signals, and there are 6 corresponding resistor voltage division combinations, that is, the voltage feedback module 30 can output 6 different feedback voltage values to the power conversion module 20, and the power conversion module 20 outputs 6 different output voltages according to the received feedback voltage, so as to meet the requirements of outputting different loads 40 at different gears.

The power conversion module 20 of this scheme possesses step-up and step-down simultaneously, can adjust the output voltage size according to the feedback voltage of voltage feedback module 30, realizes the constant voltage stable control to output voltage, can directly obtain the output voltage of target value simultaneously through once stepping up or step-down, need not to carry out earlier step-up back step-down again to input voltage, and the conversion is accomplished to the single, improves conversion efficiency.

The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.