CN206313739U - A kind of D-type audio power amplifier for portable audio product - Google Patents
A kind of D-type audio power amplifier for portable audio product Download PDFInfo
- Publication number
- CN206313739U CN206313739U CN201621307192.1U CN201621307192U CN206313739U CN 206313739 U CN206313739 U CN 206313739U CN 201621307192 U CN201621307192 U CN 201621307192U CN 206313739 U CN206313739 U CN 206313739U
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- input
- power amplifier
- input capacitance
- power
- portable audio
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Abstract
The utility model discloses a kind of D-type audio power amplifier for portable audio product, including dc source, power amplifier chip, first input capacitance, second input capacitance, 3rd input capacitance, filter capacitor, input resistance, switch and loudspeaker, the power amplifier chip includes power end, normal phase input end, inverting input, common-mode voltage decouples end, signal control end, earth terminal, positive output end and reversed-phase output, the power end is connected with dc source, compared with prior art, the utility model is fully optimized using spread spectrum, using brand-new circuit design, without wave filter, reduce outer member, PCB surface is accumulated and cost, it is simple with circuit structure, high efficiency and the small advantage of electromagnetic interference.
Description
Technical field
The utility model is related to Audio power amplifier technical field, more particularly to a kind of D for portable audio product
Genus audio power amplifier.
Background technology
Audio-frequency power amplifier is one of most important electronic device, in audio frequency apparatus, D-type audio power amplifier by
It is widely used the advantages of efficiency high, small required area of dissipation, saving layout, D-type audio power amplifier is by high frequency
PWM ripples are modulated to audio signal, and external loudspeaker sounding is driven using switching device, defeated due to using switching technique
Go out data signal, thus can typically produce larger electromagnetic interference and high-frequency noise.
New content
In view of the drawbacks described above of prior art, the utility model is there is provided a kind of D assonances for portable audio product
Frequency power amplifier, the built-in overcurrent protection of the audio-frequency power amplifier, overtemperature protection and under-voltage protection function, can effectively protect core
Piece is not damaged by an abnormal situation, and utilizes the abundant Optimization Design of Electronic Circuits of spread spectrum, with circuit structure is simple, high efficiency
The advantage small with electromagnetic interference.
The purpose of this utility model can be realized by technical scheme once：
A kind of D-type audio power amplifier for portable audio product, including dc source, power amplifier chip,
First input capacitance, the second input capacitance, the 3rd input capacitance, filter capacitor, input resistance, switch and loudspeaker, the work(
Rate amplification chip include power end, normal phase input end, inverting input, common-mode voltage decoupling end, signal control end, earth terminal,
Positive output end and reversed-phase output, the power end are connected with dc source, described first input capacitance one end and power end
It is connected, other end ground connection, described second input capacitance one end is connected with normal phase input end, other end ground connection, the 3rd input
Electric capacity one end is connected with inverting input, other end ground connection, and described filter capacitor one end is connected with common-mode voltage decoupling end, another
End ground connection, described input resistance one end is connected with power end, and the other end is connected with signal control end, described switch one end and signal
Input is connected, and other end ground connection, described loudspeaker one end is connected with positive output end, and the other end is connected with reversed-phase output.
It is preferred that the built-in overcurrent protection of power amplifier chip, overtemperature protection and under-voltage protection function, effectively protect work(
Rate amplification chip is not damaged by under abnormal operation.
It is preferred that first input capacitance and filter capacitor are 1uF.
It is preferred that second input capacitance and the 3rd input capacitance are 0.1uF.
It is preferred that the direct current power source voltage is 2.2V~5.25V.
It is preferred that the input resistance is 4 Ω.
Compared with prior art, the utility model is fully optimized using spread spectrum, using brand-new circuit design, without filter
Ripple device, reduces outer member, PCB surface product and cost, and excellent EMI rejection abilities and up to 90% efficiency is very suitable for
Mobile phone and other portable audio products.
Brief description of the drawings
Fig. 1 is the utility model circuit structure diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment for obtaining, any modification, equivalent substitution and improvements made etc., should be included in guarantor of the present utility model
Within the scope of shield.
As shown in figure 1, a kind of D-type audio power amplifier for portable audio product, including dc source 1, work(
Rate amplification chip 2, the first input capacitance 3, the second input capacitance 4, the 3rd input capacitance 5, filter capacitor 6, input resistance 7, open
8 and loudspeaker 9 are closed, the power amplifier chip 2 includes power end 10, normal phase input end 11, inverting input 12, common-mode voltage
Decoupling end 13, signal control end 14, earth terminal 15, positive output end 16 and reversed-phase output 17, the power end 10 and direct current
Power supply 1 is connected, and described one end of first input capacitance 3 is connected with power end 10, other end ground connection, second input capacitance 4 one
End is connected with normal phase input end 11, other end ground connection, and described one end of 3rd input capacitance 5 is connected with inverting input 12, another
End ground connection, the one end of the filter capacitor 6 and common-mode voltage decoupling end 13 is connected, and the other end is grounded, the one end of the input resistance 7 and
Power end 10 is connected, and the other end is connected with signal control end 14, and 8 one end of the switch are connected with signal input part 14, the other end
Ground connection, one end of the loudspeaker 9 is connected with positive output end 16, and the other end is connected with reversed-phase output 17.
The built-in overcurrent protection of the power amplifier chip 2, overtemperature protection and under-voltage protection function, effectively protect power amplification
Chip 2 is not damaged by under abnormal operation.
First input capacitance 3 and filter capacitor 6 are 1uF.
The input capacitance 5 of second input capacitance 4 and the 3rd is 0.1uF.
The voltage of the dc source 1 is 2.2V~5.25V.
The input resistance 7 is 4 Ω.
Claims (6)
1. a kind of D-type audio power amplifier for portable audio product, it is characterised in that including dc source, power
Amplification chip, the first input capacitance, the second input capacitance, the 3rd input capacitance, filter capacitor, input resistance, switch and raise one's voice
Device, the power amplifier chip includes power end, normal phase input end, inverting input, common-mode voltage decoupling end, signal control
End, earth terminal, positive output end and reversed-phase output, the power end are connected with dc source, first input capacitance one
End is connected with power end, and other end ground connection, described second input capacitance one end is connected with normal phase input end, other end ground connection, institute
State the 3rd input capacitance one end to be connected with inverting input, other end ground connection, described filter capacitor one end decouples with common-mode voltage
End is connected, and other end ground connection, described input resistance one end is connected with power end, and the other end is connected with signal control end, described to open
Close one end to be connected with signal input part, the other end is grounded, and described loudspeaker one end is connected with positive output end, the other end with it is anti-phase
Output end is connected.
2. the D-type audio power amplifier for portable audio product according to claim 1, it is characterised in that institute
State the built-in overcurrent protection of power amplifier chip, overtemperature protection and under-voltage protection function.
3. the D-type audio power amplifier for portable audio product according to claim 1, it is characterised in that institute
State the first input capacitance and filter capacitor is 1uF.
4. the D-type audio power amplifier for portable audio product according to claim 1, it is characterised in that institute
State the second input capacitance and the 3rd input capacitance is 0.1uF.
5. the D-type audio power amplifier for portable audio product according to claim 1, it is characterised in that institute
Direct current power source voltage is stated for 2.2V~5.25V.
6. the D-type audio power amplifier for portable audio product according to claim 1, it is characterised in that institute
Input resistance is stated for 4 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621307192.1U CN206313739U (en) | 2016-11-29 | 2016-11-29 | A kind of D-type audio power amplifier for portable audio product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621307192.1U CN206313739U (en) | 2016-11-29 | 2016-11-29 | A kind of D-type audio power amplifier for portable audio product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206313739U true CN206313739U (en) | 2017-07-07 |
Family
ID=59250151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621307192.1U Expired - Fee Related CN206313739U (en) | 2016-11-29 | 2016-11-29 | A kind of D-type audio power amplifier for portable audio product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206313739U (en) |
-
2016
- 2016-11-29 CN CN201621307192.1U patent/CN206313739U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20201129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |