CN202218194U - Power amplification circuit for tablet computer - Google Patents
Power amplification circuit for tablet computer Download PDFInfo
- Publication number
- CN202218194U CN202218194U CN2011203092026U CN201120309202U CN202218194U CN 202218194 U CN202218194 U CN 202218194U CN 2011203092026 U CN2011203092026 U CN 2011203092026U CN 201120309202 U CN201120309202 U CN 201120309202U CN 202218194 U CN202218194 U CN 202218194U
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- Prior art keywords
- pin
- power amplifier
- chip
- amplifier chip
- resistance
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- Expired - Fee Related
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Abstract
The utility model discloses a power amplification circuit for a tablet computer. The power amplification circuit comprises a power amplification chip U14 and a loudspeaker LS1 connected with the power amplification chip U14, wherein the power amplification chip U14 is connected with a main control chip of the tablet computer, is controlled by the main control chip and regulates current of the loudspeaker LS1 in real time. The power amplification circuit for the tablet computer, disclosed by the utility model, has the advantages of simple structure and easiness in implementation, in addition the stability of current input to the loudspeaker is ensured, the playing quality of the loudspeaker is increased, the tablet computer is ensured to output high-tone-quality audios, and the performances of the flat computer are improved.
Description
Technical field
The utility model relates to the panel computer circuit field, is specially a kind of panel computer power amplifier.
Background technology
Panel computer is a kind of electronic product, have carry, advantage easy to use, enter in the daily life gradually.Panel computer generally is made up of governor circuit and peripheral other circuit etc.The panel computer playback circuit of prior art electric current often occurs and changes the problem that causes both poor sound quality, influences the performance of panel computer.
The utility model content
The utility model purpose provides a kind of panel computer power amplifier, to solve the problem that prior art panel computer tonequality is prone to variation.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of panel computer power amplifier; Comprise the loud speaker LS1 with two terminals, the power amplifier chip U14 that model is PT5382; It is characterized in that: on the EN pin of said power amplifier chip U14 two line conductors are arranged; A line conductor is through resistance R 73 ground connection on the EN pin; Another line conductor inserts the main control chip of panel computer on the EN pin through resistance R 74; The NC pin of power amplifier chip U14, IN+ pin connect resistance R 76, capacitor C 75 ground connection that mutual series connection is passed through in the back altogether, and the series arm two that the IN-pin of power amplifier chip U14 constitutes through capacitor C 82, the series arm one of resistance R 79 formations, capacitor C 30, the resistance R 8 of connecting each other respectively inserts the main control chip of panel computers, and the IN-pin of power amplifier chip U14 also is connected with the VO+ pin of power amplifier chip U14 through resistance R 80; Be connected to the parallel branch of capacitor C 77, capacitor C 78 formations between the GND pin of power amplifier chip U14, the VDD pin; Node of said parallel branch passes through the main control chip that inductance L 15 inserts panel computers, another node ground connection of parallel branch, and the VO-pin of power amplifier chip U14, VO+ pin are connected with two terminals of loud speaker LS1 respectively one by one.
The utility model is simple in structure; Be easy to realize that the power amplifier chip inserts the main control chip of panel computer, in real time the electric current of loud speaker adjusted through main control chip control power amplifier chip; Can guarantee to import the current stabilization in the loud speaker; Improve loud speaker playback quality, guarantee the audio frequency of panel computer output, improved the performance of panel computer than high tone quality.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1.A kind of panel computer power amplifier; Comprise the loud speaker LS1 with two terminals, the power amplifier chip U14 that model is PT5382; On the EN pin of power amplifier chip U14 two line conductors are arranged; A line conductor is through resistance R 73 ground connection on the EN pin; Another line conductor inserts the main control chip of panel computer on the EN pin through resistance R 74; The NC pin of power amplifier chip U14, IN+ pin connect resistance R 76, capacitor C 75 ground connection that mutual series connection is passed through in the back altogether, and the series arm two that the IN-pin of power amplifier chip U14 constitutes through capacitor C 82, the series arm one of resistance R 79 formations, capacitor C 30, the resistance R 8 of connecting each other respectively inserts the main control chip of panel computers, and the IN-pin of power amplifier chip U14 also is connected with the VO+ pin of power amplifier chip U14 through resistance R 80; Be connected to the parallel branch of capacitor C 77, capacitor C 78 formations between the GND pin of power amplifier chip U14, the VDD pin; Node of parallel branch passes through the main control chip that inductance L 15 inserts panel computers, another node ground connection of parallel branch, and the VO-pin of power amplifier chip U14, VO+ pin are connected with two terminals of loud speaker LS1 respectively one by one.
Claims (1)
1. panel computer power amplifier; Comprise the loud speaker LS1 with two terminals, the power amplifier chip U14 that model is PT5382; It is characterized in that: on the EN pin of said power amplifier chip U14 two line conductors are arranged; A line conductor is through resistance R 73 ground connection on the EN pin; Another line conductor inserts the main control chip of panel computer on the EN pin through resistance R 74; The NC pin of power amplifier chip U14, IN+ pin connect resistance R 76, capacitor C 75 ground connection that mutual series connection is passed through in the back altogether, and the series arm two that the IN-pin of power amplifier chip U14 constitutes through capacitor C 82, the series arm one of resistance R 79 formations, capacitor C 30, the resistance R 8 of connecting each other respectively inserts the main control chip of panel computers, and the IN-pin of power amplifier chip U14 also is connected with the VO+ pin of power amplifier chip U14 through resistance R 80; Be connected to the parallel branch of capacitor C 77, capacitor C 78 formations between the GND pin of power amplifier chip U14, the VDD pin; Node of said parallel branch passes through the main control chip that inductance L 15 inserts panel computers, another node ground connection of parallel branch, and the VO-pin of power amplifier chip U14, VO+ pin are connected with two terminals of loud speaker LS1 respectively one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203092026U CN202218194U (en) | 2011-08-24 | 2011-08-24 | Power amplification circuit for tablet computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203092026U CN202218194U (en) | 2011-08-24 | 2011-08-24 | Power amplification circuit for tablet computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202218194U true CN202218194U (en) | 2012-05-09 |
Family
ID=46017419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203092026U Expired - Fee Related CN202218194U (en) | 2011-08-24 | 2011-08-24 | Power amplification circuit for tablet computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202218194U (en) |
-
2011
- 2011-08-24 CN CN2011203092026U patent/CN202218194U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20120824 |