CN205986108U - Bluetooth module with short -circuit protection - Google Patents
Bluetooth module with short -circuit protection Download PDFInfo
- Publication number
- CN205986108U CN205986108U CN201620939551.9U CN201620939551U CN205986108U CN 205986108 U CN205986108 U CN 205986108U CN 201620939551 U CN201620939551 U CN 201620939551U CN 205986108 U CN205986108 U CN 205986108U
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- China
- Prior art keywords
- circuit
- bluetooth module
- short
- field effect
- effect transistor
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Abstract
The utility model discloses a bluetooth module with short -circuit protection, including the power port that is used for carrying out wireless communication's bluetooth module and provides the electric energy for bluetooth module, be connected with short -circuit protection circuit between bluetooth module and the power port, short -circuit protection circuit includes detection circuitry, switch circuit and ON -OFF control circuit, wherein, detection circuitry is used for detecting power port to the voltage situation between the bluetooth module, switch circuit connects between detection circuitry and bluetooth module, ON -OFF control circuit carries out the comparison with detection circuitry voltage with reference voltage to control switch circuit's break -make situation according to the comparative result, its short -circuit protection circuit's circuit structure is simple, and it is integrated to be convenient for, accords with the user demand of the little volume of bluetooth.
Description
Technical field
This utility model is related to blue-tooth device field, in particular it relates to a kind of bluetooth module with short-circuit protection.
Background technology
What Modem radio communicated quickly grows, and the short range wireless transmission of particularly this kind of low-power consumption of bluetooth is extensive
It is applied to the electronic product can touch in various lives, such as keyboard, mouse, mobile phone etc., as long as interior have Bluetooth chip, just
Can match with corresponding electronic installation, and communicate wirelessly.
Hyundai Motor develops so that the fault diagnosis of automobile is not only machinery towards electronization, automation direction
Fault diagnosis, more is automated diagnostic.The automated diagnostic of Hyundai Motor adopts the controller of notebook and automobile mostly
Realize connecting and realize fault diagnosis to obtain data.Connection between notebook and automobile controller adopts bluetooth connection side mostly
Formula.Bluetooth adopts power supply power supply mode, if be short-circuited bluetooth module to be caused with irremediable destruction, due to bluetooth mould
Block small volume, therefore it is badly in need of that a kind of circuit structure is simple, be easy to integrated short-circuit protection circuit protects to bluetooth module.
Utility model content
This utility model provides a kind of bluetooth module with short-circuit protection to solve above-mentioned technical problem, and its short circuit is protected
The circuit structure of protection circuit is simple, is easy to integrated, meets the use demand of bluetooth small size.
The technical scheme in the invention for solving the above technical problem is：
There is the bluetooth module of short-circuit protection, provide including the bluetooth module for communicating wirelessly with for bluetooth module
The power port of electric energy, is connected with short-circuit protection circuit between described bluetooth module and power port, described short-circuit protection circuit
Including testing circuit, on-off circuit and ON-OFF control circuit, wherein,
Described testing circuit is used for detecting the voltage condition to bluetooth module for the power port；
Described on-off circuit is connected between testing circuit and bluetooth module；
Testing circuit voltage and reference voltage are compared by described ON-OFF control circuit, and according to comparative result to switch
The break-make situation of circuit is controlled.
Preferably, described on-off circuit includes field effect transistor, described testing circuit includes the first field effect transistor, described
The grid of one field effect transistor is connected on source electrode and is connected with power port, and the drain electrode of the first field effect transistor is connected to second effect
In the drain electrode answered, the source electrode of described second field effect transistor is connected on bluetooth module.
Further, described ON-OFF control circuit includes comparator, and an input of described comparator is connected to power end
On mouth, another input is connected on reference voltage circuit, and the outfan of described comparator is connected to the grid of the second field effect transistor
Extremely go up.
Further, described reference voltage circuit includes bleeder circuit, and described bleeder circuit includes the first electricity being in series
Resistance and second resistance, the not common end ground connection of described second resistance, the not common end of described first resistor is connected to reference voltage
On, the common port of described first resistor and second resistance is connected on an input of comparator.
Further, described first field effect transistor is P-channel field-effect transistor (PEFT) pipe.
To sum up, the beneficial effects of the utility model are：
Connection short-circuit protection circuit between bluetooth module and power port of the present utility model, it is to avoid short circuit is to bluetooth mould
The destruction of block, the circuit structure of this short-circuit protection circuit simple it is easy to integrated, be suitable to the use demand of bluetooth module small size.
Brief description
Fig. 1 be originally be utility model short-circuit protection circuit circuit diagram.
Specific embodiment
With reference to embodiment and accompanying drawing, the technical scheme in this utility model embodiment is clearly and completely retouched
State it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on this reality
With the embodiment in new, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of this utility model protection.
Embodiment 1：
There is the bluetooth module of short-circuit protection, provide including the bluetooth module for communicating wirelessly with for bluetooth module
The power port of electric energy, is connected with short-circuit protection circuit between described bluetooth module and power port, described short-circuit protection circuit
Including testing circuit, on-off circuit and ON-OFF control circuit, wherein,
Described testing circuit is used for detecting the voltage condition to bluetooth module for the power port；
Described on-off circuit is connected between testing circuit and bluetooth module；
Testing circuit voltage and reference voltage are compared by described ON-OFF control circuit, and according to comparative result to switch
The break-make situation of circuit is controlled.
Embodiment 2：
As shown in figure 1, the present embodiment is on the basis of above-described embodiment, short-circuit protection circuit is refined, that is, described
On-off circuit includes field effect transistor, and described testing circuit includes the first field effect transistor M1, the grid of described first field effect transistor M1
It is connected on source electrode and is connected with power port, the drain electrode of the first field effect transistor M1 is connected in the drain electrode of the second field effect M2,
The source electrode of described second field effect transistor M2 is connected on bluetooth module.
Described ON-OFF control circuit includes comparator A, and an input of described comparator A is connected on power port, separately
One input is connected on reference voltage circuit, and the outfan of described comparator A is connected on the grid of the second field effect transistor M2.
Described reference voltage circuit includes bleeder circuit, and described bleeder circuit includes first resistor R1 being in series and second
Resistance R2, the not common end ground connection of described second resistance R2, the not common end of described first resistor R1 is connected to reference voltage U
On, the common port of described first resistor R1 and second resistance R2 is connected on an input of comparator A.
Described first field effect transistor M1 is P-channel field-effect transistor (PEFT) pipe.
The short-circuit protection circuit of this programme is when the power port overtension that is short-circuited, comparator one input terminal voltage liter
So that comparator two input terminal voltage increases, comparator output signal turns off the second field effect transistor to height, reaches the mesh of short-circuit protection
's.
As described above, this utility model can preferably be realized.
Claims (5)
1. there is the bluetooth module of short-circuit protection, provide electricity including the bluetooth module for communicating wirelessly with for bluetooth module
Can power port it is characterised in that：It is connected with short-circuit protection circuit, described short circuit between described bluetooth module and power port
Protection circuit includes testing circuit, on-off circuit and ON-OFF control circuit, wherein,
Described testing circuit is used for detecting the voltage condition to bluetooth module for the power port；
Described on-off circuit is connected between testing circuit and bluetooth module；
Testing circuit voltage and reference voltage are compared by described ON-OFF control circuit, and according to comparative result to on-off circuit
Break-make situation be controlled.
2. the bluetooth module with short-circuit protection according to claim 1 it is characterised in that：Described on-off circuit includes field
Effect pipe, described testing circuit includes the first field effect transistor, the grid of described first field effect transistor be connected on source electrode and with electricity
Source port is connected, and the drain electrode of the first field effect transistor is connected in the drain electrode of the second field effect, the source electrode of described second field effect transistor
It is connected on bluetooth module.
3. the bluetooth module with short-circuit protection according to claim 2 it is characterised in that：Described ON-OFF control circuit bag
Include comparator, an input of described comparator is connected on power port, and another input is connected on reference voltage circuit,
The outfan of described comparator is connected on the grid of the second field effect transistor.
4. the bluetooth module with short-circuit protection according to claim 3 it is characterised in that：Described reference voltage circuit bag
Include bleeder circuit, described bleeder circuit includes the first resistor being in series and second resistance, the not common end of described second resistance
Ground connection, the not common end of described first resistor is connected on reference voltage, and the common port of described first resistor and second resistance is even
It is connected on an input of comparator.
5. the bluetooth module with short-circuit protection according to claim 2 it is characterised in that：Described first field effect transistor is
P-channel field-effect transistor (PEFT) pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939551.9U CN205986108U (en) | 2016-08-25 | 2016-08-25 | Bluetooth module with short -circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939551.9U CN205986108U (en) | 2016-08-25 | 2016-08-25 | Bluetooth module with short -circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205986108U true CN205986108U (en) | 2017-02-22 |
Family
ID=58034977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620939551.9U Expired - Fee Related CN205986108U (en) | 2016-08-25 | 2016-08-25 | Bluetooth module with short -circuit protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205986108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229940A (en) * | 2016-08-25 | 2016-12-14 | 成都优购科技有限公司 | A kind of blue-tooth device of short-circuit protection |
-
2016
- 2016-08-25 CN CN201620939551.9U patent/CN205986108U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229940A (en) * | 2016-08-25 | 2016-12-14 | 成都优购科技有限公司 | A kind of blue-tooth device of short-circuit protection |
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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: 20170222 Termination date: 20170825 |