CN106534411A - Volume boost driving device and mobile terminal - Google Patents
Volume boost driving device and mobile terminal Download PDFInfo
- Publication number
- CN106534411A CN106534411A CN201610984391.4A CN201610984391A CN106534411A CN 106534411 A CN106534411 A CN 106534411A CN 201610984391 A CN201610984391 A CN 201610984391A CN 106534411 A CN106534411 A CN 106534411A
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- China
- Prior art keywords
- power amplifier
- pin
- resistance
- electric capacity
- driving means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72466—User interfaces specially adapted for cordless or mobile telephones with selection means, e.g. keys, having functions defined by the mode or the status of the device
Abstract
The present invention discloses a volume boost driving device and a mobile terminal. The driving device is connected with a battery and a CPU and comprises a power supply control module and a power amplifier module, the power supply control module boosts the voltage of the battery, outputs a stable DC power supply to the power amplifier module, and also controls the voltage of the DC power supply to increase or recover to an original value according to the button operations of the users, and the power amplifier module amplifies the power of an inputted audio signal correspondingly according to the DC power supply and then plays the audio signal. According to the present invention, the stability of the DC power supply is not influenced by the electric quantity of the battery, so that the volume and sound effects of the mobile terminal are consistent under different electric quantity states, the problem that the sound is lower and distorts when the voltage of the battery is lower, is solved, and the high quality of the sound is guaranteed. Moreover, the DC power supply also can be improved according to the button operations, thereby realizing a volume boost effect and the driving of a large-power loudspeaker, and satisfying the large volume demands of the users.
Description
Technical field
The present invention relates to speaker drive technical field, more particularly to a kind of driving means and the movement of volume boosting
Terminal.
Background technology
Existing loudspeaker driving circuit is as shown in figure 1, loudspeaker driving circuit passes through audio frequency power amplifier PA by less sound
Frequency input signal AUD_IN promotes speaker operation after carrying out power amplification, sends sound.Push button signalling GPIO controls audio frequency work(
Put the keying of PA.The power supply of audio frequency power amplifier PA is directly powered by battery.But, cell voltage VBAT is not stable power supply, than
Such as in mobile phone, it is that cell voltage VBAT is 4.2V during battery Full Charge Capacity, during low battery, cell voltage VBAT is 3.6V.
As the maximum amplitude Vpeak of the output signal of audio frequency power amplifier PA depends on power supply, the i.e. battery electricity of audio frequency power amplifier
The size of pressure VBAT, Vpeak ≈ VBAT.Therefore the voice signal of audio frequency power amplifier PA outputs is not stable.In actual applications,
Such problem occurs：When battery electric quantity is relatively expired, cell voltage VBAT is high, and the sound of output is big, and sound is undistorted；When
When battery electric quantity is relatively low, cell voltage VBAT is low, and the sound of output is little, while maximum output Vpeak that audio frequency power amplifier PA is allowed
Reduce so that the signal that normally can be exported originally is produced and cuts top, causes distortion and noise.Also, due to cell voltage VBAT
Highest also only has 4.2V, it is impossible to drive some powerful loudspeakers.
Thus prior art could be improved and improve.
The content of the invention
In view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of driving means of volume boosting
And mobile terminal, with solve existing loudspeaker driving circuit can not drive powerful loudspeaker, when cell voltage is relatively low it is defeated
Go out that sound is less and the problem of distortion.
In order to achieve the above object, this invention takes technical scheme below：
A kind of driving means of volume boosting, are connected with battery and CPU, and which includes energy supply control module and power amplifier module；
Cell voltage boosting is exported galvanic current source and is powered to power amplifier module by the energy supply control module, always according to user
Button operation control dc source voltage increase or recover initial value；Power amplifier module is according to the size of dc source to input
Audio signal is played after carrying out correspondence power amplification.
The driving means of described volume boosting, wherein, the energy supply control module include boost converter, inductance,
One resistance, second resistance, 3rd resistor, the 4th resistance and button；
The positive pole of one end, one end of inductance and battery of the VIN pin connection first resistor of the boost converter；Boost converter
EN pin connect first resistor the other end；The SW pin connection other end of inductance of boost converter, one end of second resistance and
Power amplifier module, one end of the other end, one end of 3rd resistor and the 4th resistance of the FB pin connection second resistance of boost converter；
The GND pin ground connection of boost converter, one end of button connect the other end of the 4th resistance, the other end connection 3rd resistor of button
The other end and ground.
The driving means of described volume boosting, wherein, the resistance of the second resistance is M Ω levels, 3rd resistor and the
The resistance of four resistance is K Ω levels.
The driving means of described volume boosting, wherein, the energy supply control module also includes the first electric capacity；Described first
The VIN pin and the positive pole of battery of one end connection boost converter of electric capacity, the other end ground connection of the first electric capacity.
The driving means of described volume boosting, wherein, the energy supply control module also includes diode；The diode
Positive pole connection boost converter SW pin and inductance the other end, diode negative pole connection second resistance one end and power amplifier
Module.
The driving means of described volume boosting, wherein, the energy supply control module also includes the second electric capacity；Described second
One end of electric capacity connects the negative pole of diode, and the other end of the second electric capacity connects the FB pin of boost converter.
The driving means of described volume boosting, wherein, the energy supply control module also includes the 3rd electric capacity；Described 3rd
One end of electric capacity connects one end of the second electric capacity, the other end ground connection of the 3rd electric capacity.
The driving means of described volume boosting, wherein, the power amplifier module includes audio frequency power amplifier and loudspeaker；The sound
The IN pin of frequency power amplifier and SD pin connection CPU, the VDD pin of audio frequency power amplifier connect the negative pole of diode, the OUT+ pin of audio frequency power amplifier and
OUT- pin connect loudspeaker.
The driving means of described volume boosting, wherein, the power amplifier module includes audio frequency power amplifier and loudspeaker；The sound
The IN pin of frequency power amplifier and SD pin connection CPU, the VDD pin of audio frequency power amplifier connect one end of the 3rd electric capacity, the OUT+ pin of audio frequency power amplifier
Connect loudspeaker with OUT- pin.
A kind of mobile terminal, including CPU and battery, its driving means also including described volume boosting；The power supply
The cell voltage boosting that battery is exported by control module exports galvanic current source and powers to power amplifier module, always according to user's
The voltage increase of button operation control dc source recovers initial value；CPU outputs enable the keying shape that signal controls power amplifier module
State, plays after correspondence power amplification being carried out to the audio signal that CPU is transmitted according to the size of dc source when power amplifier module is opened.
The driving means and mobile terminal of the volume boosting provided compared to prior art, the present invention, by power supply
Cell voltage boosting is exported galvanic current source and is powered to power amplifier module by module, and the button operation control always according to user is straight
The voltage increase of stream power supply recovers initial value；Power amplifier module carries out correspondence to the audio signal being input into according to the size of dc source
Play after power amplification.Dc source is not stably affected by battery electric quantity, makes mobile terminal volume under different state of charge
Reach consistent with sound effect, so as to solve the problems, such as to export when cell voltage is relatively low, sound is less and distortion, it is ensured that
The high-quality of sound；Also, the size of dc source can also be improved according to button operation, the effect of volume boosting is realized, it is full
The big volume demand of sufficient user, realizes the driving of supersound projector.
Description of the drawings
Fig. 1 is existing loudspeaker driving circuit figure.
Fig. 2 is the structured flowchart of the mobile terminal of the volume boosting that the present invention is provided.
Fig. 3 is the circuit diagram of the driving means of the volume boosting that the present invention is provided.
Specific embodiment
The present invention provides a kind of driving means and mobile terminal of volume boosting, it is adaptable to which all electronics with loudspeaker are produced
The mobile terminal such as product, such as mobile phone, flat board, notebook computer, music player；Can provide and stablize adjustable power supply signal, make shifting
Dynamic terminal volume under different state of charge reaches consistent with sound effect.The electricity of the power supply signal of audio frequency power amplifier can also be improved
Pressure, plays volume boosting（Volume Boost）Effect, lifted mobile terminal sound quality.For make the purpose of the present invention,
Technical scheme and advantage are clearer, clear and definite, and the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.Should
Understand, specific embodiment described herein only to explain the present invention, is not intended to limit the present invention.
The driving means of the volume boosting provided please refer to Fig. 2 and Fig. 3, the present invention are connected with battery and CPU, including power supply
Control module 100 and power amplifier module 200；Cell voltage VBAT is boosted and exports stable direct current by the energy supply control module 100
Power supply is powered to power amplifier module 200, the voltage increase or recovery initial value always according to the button operation control dc source of user；Work(
Amplification module 200 is played after correspondence power amplification is carried out to the audio signal being input into according to the size of dc source.
Please continue to refer to Fig. 3, the energy supply control module 100 include boost converter P1, inductance L, first resistor R1,
Two resistance R2,3rd resistor R3, the 4th resistance R4 and button S；VIN pin connection first resistor R1 of the boost converter P1
The positive pole of one end, one end of inductance L and battery；The EN pin of boost converter P1 connect the other end of first resistor R1；Boosting turns
The SW pin of parallel operation P1 connect the other end, one end of second resistance R2 and the power amplifier module 200 of inductance L, the FB of boost converter P1
One end of the other end, one end of 3rd resistor R3 and the 4th resistance R4 of pin connection second resistance R2；The GND of boost converter P1
Pin is grounded, and one end of button S connects the other end of the 4th resistance R4, and the other end of button S connects the other end of 3rd resistor R3
And ground.
In the present embodiment, model SGM6601 of the boost converter P1.The VIN pin input of boost converter P1
The amplitude range of voltage is 1.8V ~ 5.5V, and that what is be input into herein is cell voltage VBAT.Boost converter P1 is to cell voltage VBAT
Boost conversion being carried out, galvanic current source VDD being exported in its SW pin, the amplitude range of voltage is VBAT to 38V.Dc source
The voltage swing of VDD is determined by the resistance of second resistance R2,3rd resistor R3 and the 4th resistance R4.In other words, dc source
The voltage swing of VDD can be directed to different mobile terminals（Such as mobile phone, flat board, notebook etc.）Requirement be correspondingly arranged.
The resistance of second resistance R2 be M Ω levels, such as 1M Ω；The resistance of 3rd resistor R3 and the 4th resistance R4 is hundreds of
K Ω levels, such as 3rd resistor R3 are 440K Ω；4th resistance R4 is 530K Ω.The then magnitude of voltage V=1.229 of dc source VDD
× [R1/ (R3∥R4)].3rd resistor R3 and the 4th resistance R4 are parallel relationship, and by button S controls, whether both are in parallel.
Can be drawn according to above-mentioned resistance, when button S opens a way, V=1.229 ×（R2 / R3）=4.0V, the voltage of dc source VDD
Remain stable to export, will not be affected by battery electric quantity.When button S paths, VDD=1.229 × [R2/(R3 ∥ R4)]
= 6.3V.Wherein, 1.229 is the feedback circuit reference voltage of boost converter P1, is a definite value；（R2 / R3）Represent the
The resistance that two resistance R2 are connected with 3rd resistor R3, [R2/(R3 ∥ R4)] represent that 3rd resistor R3 is in parallel with the 4th resistance R4
The resistance connected with second resistance R2 again afterwards.Therefore, no matter current battery level VBAT is much, the dc source for finally exporting
The voltage swing of VDD is only determined with the resistance of second resistance R2,3rd resistor R3 and the 4th resistance R4.Can so avoid in electricity
Export when cell voltage is relatively low that sound is less and the problem of distortion.In addition, by the confession TV university of the controllable power amplifier modules 200 of button S
It is little, realize extra volume enhanced feature；Except the tonequality that can guarantee that mobile terminal output is not affected by battery electric quantity, may be used also
To bring Δ=20 × lg（6.3 / 4.0）The volume of=4dB is lifted.When the big volume of user's request（Such as in noisy ring
The situations such as border, conference call application）, higher dc source VDD by the S that pushes button drives powerful loudspeaker.Need
When recovering initial value, control button S is upspring.
In the specific implementation, the button S can be by physical button or software keys programming realization.Button S is pressed for physics
During key, the volume key or button key of compatible mobile terminal.For software keys when, a key icon can be shown, such as received calls
When display key icon, clicked, control button S is pressed, then is clicked on, and button S upsprings.
First resistor R1 is divider resistance, and the internal resistance with the EN pin of boost converter P1 be connected, composition bleeder circuit, makes liter
The EN pin of pressure converter P1 are in high level state, are normally open.So, the keying of power amplifier module 200 is only by CPU controls,
Other influences are not received, is controlled simple and reliable.Inductance L is boost converter P1（DC-DC boost conversions）Energy storage inductor.
In further embodiment, the energy supply control module 100 also includes making an uproar for the power supply for filtering cell voltage VBAT
First electric capacity C1 of sound and ripple, capacitance are preferably 4.7uF；One end connection boost converter P1's of the first electric capacity C1
The positive pole of VIN pin and battery, the other end ground connection of the first electric capacity C1.
In further embodiment, the energy supply control module 100 also includes two poles for preventing dc source VDD from pouring in down a chimney
Pipe D；The SW pin and the other end of inductance L of the positive pole connection boost converter P1 of the diode D, the negative pole connection of diode D
One end of second resistance R2 and power amplifier module 200.
In further embodiment, the energy supply control module 100 also include for feedback voltage is filtered second
Electric capacity C2（Also it is boost feedback electric capacity）；One end of the second electric capacity C2 connects the negative pole of diode D, and the second electric capacity C2's is another
One end connects the FB pin of boost converter P1.The preferred pf levels electric capacity of second electric capacity C2, capacitance are preferably 10pF.
In further embodiment, the energy supply control module 100 also includes filtering for the dc source VDD to exporting
3rd electric capacity C3 of ripple；One end of the 3rd electric capacity C3 connects one end of the second electric capacity C2, another termination of the 3rd electric capacity C3
Ground.The preferred uf levels electric capacity of 3rd electric capacity C3, capacitance are preferably 1uF.
The power amplifier module 200 includes audio frequency power amplifier P2 and loudspeaker SP；The IN pin of the audio frequency power amplifier P2 and SD pin connect
Connect CPU, the negative pole of the VDD pin connection diode D of audio frequency power amplifier P2 or one end of the 3rd electric capacity C3, the OUT+ pin of audio frequency power amplifier P2
Connect loudspeaker SP with OUT- pin.
The button of loudspeaker SP is exported the enable signal GPIO's of the SD pin to audio frequency power amplifier P2 by CPU controls by CPU
Low and high level is controlled.Audio frequency power amplifier P2 carries out correspondence according to the size of dc source VDD to audio signal AUD_IN that CPU is exported
Power amplification, then drive the speaker SP sounding play.Maximum amplitude Vpeak ≈ after the power amplification of audio signal AUD_IN
VDD。
Based on the driving means of above-mentioned volume boosting, the present invention also provides a kind of mobile terminal, please continue to refer to Fig. 2,
Including CPU and battery, also including the driving means of above-mentioned volume boosting；Battery is exported by the energy supply control module 100
Cell voltage VBAT boostings export galvanic current source and power to power amplifier module 200, control always according to the button operation of user
The voltage increase of dc source recovers initial value；CPU outputs enable the open/close states that signal GPIO controls power amplifier module 200.Work(
Play after correspondence power amplification is carried out to the audio signal that CPU is transmitted according to the size of dc source when amplification module 200 is opened.
The mobile terminal includes all electronic products with loudspeaker, and such as mobile phone, flat board, notebook computer, music is broadcast
Put device etc..
In sum, the driving means and mobile terminal of volume boosting of the invention, are not affected by battery electric quantity, can be defeated
Go out to stablize adjustable dc source to power to audio frequency power amplifier, reach mobile terminal volume and sound effect under different state of charge
To consistent；Ensure that the high-quality of sound；Also, the supply voltage of audio frequency power amplifier can also be improved when button is pressed, is realized
The effect of volume boosting, meets user's big volume demand in certain situations, realizes the driving of supersound projector.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can
To be improved according to the above description or be converted, all these modifications and variations should all belong to the guarantor of claims of the present invention
Shield scope.
Claims (10)
1. a kind of driving means of volume boosting, are connected with battery and CPU, it is characterised in that including energy supply control module and work(
Amplification module；
Cell voltage boosting is exported galvanic current source and is powered to power amplifier module by the energy supply control module, always according to user
Button operation control dc source voltage increase or recover initial value；Power amplifier module is according to the size of dc source to input
Audio signal is played after carrying out correspondence power amplification.
2. driving means of volume boosting according to claim 1, it is characterised in that the energy supply control module includes rising
Pressure converter, inductance, first resistor, second resistance, 3rd resistor, the 4th resistance and button；
The positive pole of one end, one end of inductance and battery of the VIN pin connection first resistor of the boost converter；Boost converter
EN pin connect first resistor the other end；The SW pin connection other end of inductance of boost converter, one end of second resistance and
Power amplifier module, one end of the other end, one end of 3rd resistor and the 4th resistance of the FB pin connection second resistance of boost converter；
The GND pin ground connection of boost converter, one end of button connect the other end of the 4th resistance, the other end connection 3rd resistor of button
The other end and ground.
3. driving means of volume boosting according to claim 2, it is characterised in that the resistance of the second resistance is M
The resistance of Ω levels, 3rd resistor and the 4th resistance is K Ω levels.
4. driving means of volume boosting according to claim 2, it is characterised in that the energy supply control module also includes
First electric capacity；The VIN pin and the positive pole of battery of one end connection boost converter of first electric capacity, the other end of the first electric capacity
Ground connection.
5. driving means of volume boosting according to claim 4, it is characterised in that the energy supply control module also includes
Diode；The SW pin and the other end of inductance of the positive pole connection boost converter of the diode, the negative pole connection the of diode
One end of two resistance and power amplifier module.
6. driving means of volume boosting according to claim 5, it is characterised in that the energy supply control module also includes
Second electric capacity；One end of second electric capacity connects the negative pole of diode, the other end connection boost converter of the second electric capacity
FB pin.
7. driving means of volume boosting according to claim 6, it is characterised in that the energy supply control module also includes
3rd electric capacity；One end of 3rd electric capacity connects one end of the second electric capacity, the other end ground connection of the 3rd electric capacity.
8. driving means of volume boosting according to claim 5, it is characterised in that the power amplifier module includes audio frequency work(
Put and loudspeaker；The IN pin of the audio frequency power amplifier and SD pin connection CPU, the VDD pin of audio frequency power amplifier connect the negative pole of diode, sound
The OUT+ pin of frequency power amplifier and OUT- pin connection loudspeaker.
9. driving means of volume boosting according to claim 7, it is characterised in that the power amplifier module includes audio frequency work(
Put and loudspeaker；The IN pin of the audio frequency power amplifier and SD pin connection CPU, the VDD pin of audio frequency power amplifier connect one end of the 3rd electric capacity,
The OUT+ pin of audio frequency power amplifier and OUT- pin connection loudspeaker.
10. a kind of mobile terminal, including CPU and battery, it is characterised in that also include the sound as described in claim 1-9 is arbitrary
The driving means of amount boosting；The boosting of cell voltage that battery is exported by the energy supply control module export galvanic current source to
Power amplifier module is powered, the voltage increase or recovery initial value always according to the button operation control dc source of user；CPU outputs are enabled
Signal controls the open/close states of power amplifier module, is believed according to the audio frequency that the size of dc source is transmitted to CPU when power amplifier module is opened
Play after number carrying out correspondence power amplification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610984391.4A CN106534411A (en) | 2016-11-09 | 2016-11-09 | Volume boost driving device and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610984391.4A CN106534411A (en) | 2016-11-09 | 2016-11-09 | Volume boost driving device and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106534411A true CN106534411A (en) | 2017-03-22 |
Family
ID=58350308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610984391.4A Pending CN106534411A (en) | 2016-11-09 | 2016-11-09 | Volume boost driving device and mobile terminal |
Country Status (1)
| Country | Link |
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| CN (1) | CN106534411A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117748936A (en) * | 2024-02-19 | 2024-03-22 | 成都麦特斯科技有限公司 | Low-power consumption boost system |
| CN117748936B (en) * | 2024-02-19 | 2024-04-26 | 成都麦特斯科技有限公司 | Low-power consumption boost system |
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| JP2003234621A (en) * | 2002-02-12 | 2003-08-22 | Alpine Electronics Inc | Audio device |
| CN103283284A (en) * | 2011-01-10 | 2013-09-04 | 高通股份有限公司 | Battery power monitoring and audio signal attenuation |
| CN203608346U (en) * | 2013-11-28 | 2014-05-21 | 浙江恒科实业有限公司 | Portable bluetooth speaker |
| CN104469620A (en) * | 2014-11-24 | 2015-03-25 | 青岛歌尔声学科技有限公司 | Acoustical product with audio output power adjustable within large range |
| CN105549946A (en) * | 2015-12-08 | 2016-05-04 | 深圳天珑无线科技有限公司 | Intelligent audio system |
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- 2016-11-09 CN CN201610984391.4A patent/CN106534411A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003234621A (en) * | 2002-02-12 | 2003-08-22 | Alpine Electronics Inc | Audio device |
| CN103283284A (en) * | 2011-01-10 | 2013-09-04 | 高通股份有限公司 | Battery power monitoring and audio signal attenuation |
| CN203608346U (en) * | 2013-11-28 | 2014-05-21 | 浙江恒科实业有限公司 | Portable bluetooth speaker |
| CN104469620A (en) * | 2014-11-24 | 2015-03-25 | 青岛歌尔声学科技有限公司 | Acoustical product with audio output power adjustable within large range |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117748936A (en) * | 2024-02-19 | 2024-03-22 | 成都麦特斯科技有限公司 | Low-power consumption boost system |
| CN117748936B (en) * | 2024-02-19 | 2024-04-26 | 成都麦特斯科技有限公司 | Low-power consumption boost system |
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Application publication date: 20170322 |
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