CN205179327U - Take power protection's digital audio amplifier - Google Patents
Take power protection's digital audio amplifier Download PDFInfo
- Publication number
- CN205179327U CN205179327U CN201520820326.9U CN201520820326U CN205179327U CN 205179327 U CN205179327 U CN 205179327U CN 201520820326 U CN201520820326 U CN 201520820326U CN 205179327 U CN205179327 U CN 205179327U
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- China
- Prior art keywords
- circuit
- storage battery
- comparison
- voltage
- sound box
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- 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.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a take power protection's digital audio amplifier, level amplifier circuit behind the anti -reverse connection circuit, lightning protection circuit, storage battery voltage control circuit, audio frequency preceding stage filter circuit and the audio frequency that connect gradually, storage battery voltage control circuit includes sampling circuit, the comparison circuit who is connected with sampling circuit electricity and the electronic switch who is connected with the comparison circuit electricity, and sampling circuit is used for generating voltage signal corresponding with it according to the battery voltage, and comparison circuit is used for exporting sampling circuit 0 according to voltage signal, and electronic switch is used for controlling the circuit break -make between storage battery and the load according to sampling circuit 0. Ensure digital audio amplifier organize altogether with safe storage battery voltage range in, prolong its life by a wide margin.
Description
Technical field
The utility model relates to and belongs to technology for loudspeaker box field, particularly the digital sound box protected of a kind of charged.
Background technology
The digital sound box traditional scheme generally adopted at present, do safety precaution for storage battery, positive and negative wrong can produce burning power amplifier, and power amplifier is still with what simulate, and the sound played out does not have digital power amplifier clear.
Original technology existing defects: do not do battery safety strick precaution can produce hidden danger, original be that analog amplifier can produce playing efficiency and interference.
Therefore, need to develop a kind of digital sound box that can not burn the charged protection of power amplifier.
Utility model content
The utility model provides the digital sound box of a kind of charged protection, in order to solve the technical problem that tradition easily burns out.
The digital sound box that the utility model provides a kind of charged to protect, comprises the reverse-connection preventing circuit, lightning protection circuit, battery voltage control circuit, audio frequency prime filter circuit and the audio frequency rear class amplifying circuit that connect successively;
The electronic switch that battery voltage control circuit comprises sample circuit, the comparison circuit be electrically connected with sample circuit and is electrically connected with comparison circuit, sample circuit is used for generating corresponding voltage signal according to battery voltage, comparison circuit is used for exporting control signal according to voltage signal, and electronic switch is used for according to the connecting and disconnecting of the circuit between control signal control storage battery and load.
Comparison circuit comprises the lower limit comparison control circuit be electrically connected with a 10.5V reference voltage circuit and the higher limit comparison control circuit be electrically connected with a 14.5V reference voltage circuit, lower limit comparison control circuit is used at cell voltage signal lower than generating the control signal disconnecting current supply circuit between storage battery and load during 10.5V, and higher limit comparison control circuit is used at cell voltage signal higher than generating the control signal disconnecting current supply circuit between storage battery and load during 14.5V.
Further, reverse-connection preventing circuit comprises the anti-reverse diode that string is located at power input.
Further, lightning protection circuit comprises one or more in varistor, Transient Voltage Suppressor or the fuse set gradually.
Further, the casing top of audio amplifier is provided with a telescopic lever, and the bottom of audio amplifier is provided with roller.
Beneficial effect:
The digital sound box of the utility model charged protection, possessing can be anti-reverse, can absorb again the transient peak voltage and surge big current that produce in supply voltage, each first device in available protecting digital sound box.Simultaneously, the utility model is 10.5V-14.5V by the operating voltage range of the accurate control figure audio amplifier of battery voltage control circuit energy, when battery voltage exceeds this scope, current supply circuit between storage battery and load is cut off, guarantee that digital sound box works within the scope of safe voltage, under avoiding it to be operated in under-voltage or overvoltage condition.
Accompanying drawing explanation
Fig. 1 is the system configuration schematic diagram of the digital sound box of a kind of charged protection of the utility model;
Fig. 2 is the hardware configuration schematic diagram of battery voltage control circuit in the digital sound box of a kind of charged protection of the utility model.
Reference numeral:
10, reverse-connection preventing circuit; 20, lightning protection circuit; 30, battery voltage control circuit; 31, sample circuit; 32, comparison circuit; 321, lower limit comparison control circuit; 322, higher limit comparison control circuit; 33, electronic switch; 40, audio frequency prime filter circuit; 50, audio frequency rear class amplifying circuit.
Embodiment
Below will be described an embodiment of the present utility model.
See figures.1.and.2, the digital sound box that the utility model provides a kind of charged to protect, comprises the reverse-connection preventing circuit 10, lightning protection circuit 20, battery voltage control circuit 30, audio frequency prime filter circuit 40 and the audio frequency rear class amplifying circuit 50 that connect successively;
The electronic switch 33 that battery voltage control circuit 30 comprises sample circuit 31, the comparison circuit 32 be electrically connected with sample circuit 31 and is electrically connected with comparison circuit 32, sample circuit 31 is for generating corresponding voltage signal according to battery voltage, comparison circuit 32 is for exporting control signal according to voltage signal, and electronic switch 33 is for controlling the connecting and disconnecting of the circuit between storage battery and load according to control signal.
Comparison circuit 32 comprises the lower limit comparison control circuit 321 be electrically connected with a 10.5V reference voltage circuit and the higher limit comparison control circuit 322 be electrically connected with a 14.5V reference voltage circuit, lower limit comparison control circuit 321 is for disconnecting the control signal of current supply circuit between storage battery and load at cell voltage signal lower than generation during 10.5V, and higher limit comparison control circuit 322 is for disconnecting the control signal of current supply circuit between storage battery and load at cell voltage signal higher than generation during 14.5V.
The digital sound box of the utility model charged protection, possessing can be anti-reverse, can absorb again the transient peak voltage and surge big current that produce in supply voltage, each first device in available protecting digital sound box.Simultaneously, the utility model is 10.5V-14.5V by the operating voltage range of the accurate control figure audio amplifier of battery voltage control circuit 30 energy, when battery voltage exceeds this scope, current supply circuit between storage battery and load is cut off, guarantee that digital sound box works within the scope of safe voltage, under avoiding it to be operated in under-voltage or overvoltage condition.
Alternatively, electronic switch 33 comprises power MOS pipe or thyristor.
Further, reverse-connection preventing circuit 10 comprises the anti-reverse diode that string is located at power input.
Further, lightning protection circuit 20 comprises one or more in varistor, Transient Voltage Suppressor or the fuse set gradually.
Further, the casing top of audio amplifier is provided with a telescopic lever, and the bottom of audio amplifier is provided with roller.By this kind of mode, the utility model preferred embodiment is extremely convenient to carrying.
By specific embodiment, the utility model has been described in detail above, but the utility model is not limited to this.Under the prerequisite without prejudice to the utility model spirit, those skilled in the art can make various change and modification to the utility model.
Claims (4)
1. a digital sound box for charged protection, is characterized in that: the digital sound box of described charged protection comprises the reverse-connection preventing circuit, lightning protection circuit, battery voltage control circuit, audio frequency prime filter circuit and the audio frequency rear class amplifying circuit that connect successively;
The electronic switch that described battery voltage control circuit comprises sample circuit, the comparison circuit be electrically connected with described sample circuit and is electrically connected with described comparison circuit, described sample circuit is used for generating corresponding voltage signal according to battery voltage, described comparison circuit is used for exporting control signal according to described voltage signal, and described electronic switch is used for according to the connecting and disconnecting of the circuit between described control signal control storage battery and load;
Described comparison circuit comprises the lower limit comparison control circuit be electrically connected with a 10.5V reference voltage circuit and the higher limit comparison control circuit be electrically connected with a 14.5V reference voltage circuit, described lower limit comparison control circuit is used at cell voltage signal lower than generating the control signal disconnecting current supply circuit between storage battery and load during 10.5V, and described higher limit comparison control circuit is used at cell voltage signal higher than generating the control signal disconnecting current supply circuit between storage battery and load during 14.5V.
2. the digital sound box of charged protection as claimed in claim 1, is characterized in that:
Described reverse-connection preventing circuit comprises the anti-reverse diode that string is located at power input.
3. the digital sound box of charged protection as claimed in claim 1, is characterized in that:
Described lightning protection circuit comprise in varistor, Transient Voltage Suppressor or the fuse set gradually one or more.
4. the digital sound box of the charged protection as described in claim as arbitrary in claims 1 to 3, is characterized in that:
The casing top of described audio amplifier is provided with a telescopic lever, and the bottom of described audio amplifier is provided with roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520820326.9U CN205179327U (en) | 2015-10-23 | 2015-10-23 | Take power protection's digital audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520820326.9U CN205179327U (en) | 2015-10-23 | 2015-10-23 | Take power protection's digital audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205179327U true CN205179327U (en) | 2016-04-20 |
Family
ID=55743252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520820326.9U Expired - Fee Related CN205179327U (en) | 2015-10-23 | 2015-10-23 | Take power protection's digital audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205179327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106020309A (en) * | 2016-07-11 | 2016-10-12 | 孟令冬 | High-voltage biasing circuit |
-
2015
- 2015-10-23 CN CN201520820326.9U patent/CN205179327U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106020309A (en) * | 2016-07-11 | 2016-10-12 | 孟令冬 | High-voltage biasing circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20171023 |