CN208285220U - A kind of automobile power source protection circuit - Google Patents
A kind of automobile power source protection circuit Download PDFInfo
- Publication number
- CN208285220U CN208285220U CN201820986438.5U CN201820986438U CN208285220U CN 208285220 U CN208285220 U CN 208285220U CN 201820986438 U CN201820986438 U CN 201820986438U CN 208285220 U CN208285220 U CN 208285220U
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- circuit
- pressure difference
- low pressure
- power converter
- voltage regulator
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Abstract
The utility model discloses a kind of automobile power sources to protect circuit comprising anti-electromagnetic compatibility circuit；Anti- electromagnetic compatibility circuit is connect with the first low pressure difference linear voltage regulator, the first DC power converter and the second DC power converter respectively；First DC power converter is connect with voltage monitoring circuit and telecommunication circuit respectively；Voltage monitoring circuit includes the resistance R17 for voltage sample；Telecommunication circuit includes microcontroller MPC5775 chip and the DC power supply circuit that connect with microcontroller MPC5775 chip；DC power supply circuit is connect by its built-in SPI communication module with microcontroller MPC5775 chip；First low pressure difference linear voltage regulator is connect with the second low pressure difference linear voltage regulator and isolator respectively；Second DC power converter is connect with third low pressure difference linear voltage regulator.
Description
Technical field
The utility model belongs to the technical field of automobile power source, and in particular to a kind of automobile power source protection circuit.
Background technique
Nowadays automobile has become the essential walking-replacing tool of every household, with the offer of living standard, automobile
The increase of quantity, accident rate are also constantly rising, and vehicle driving safety is also by everybody attention and concern.Automobile collision preventing
Early warning system has become the hot spot of automotive field research.Based on 77GHz Automobile Millimeter Wave Radar sensor because environment resistant is interfered
The feature that ability is strong, stability is high is expected.Can all weather operations, not by the bad weathers shadow such as light, haze and sandstorm
It rings.
And it is currently used for the power supply of car radar, it is easy to be interfered, supply voltage output is fixed and cannot be to power supply electricity
Pressure is monitored in real time.
Utility model content
The purpose of this utility model is that being directed to above-mentioned deficiency in the prior art, a kind of automobile power source protection electricity is provided
Road is easy to be interfered to solve to be currently used for the power supply of car radar, and supply voltage cannot be monitored in real time
Problem.
In order to achieve the above objectives, the technical scheme adopted by the utility model is that:
A kind of automobile power source protection circuit comprising anti-electromagnetic compatibility circuit；Anti- electromagnetic compatibility circuit is low with first respectively
Pressure difference linear voltage regulator, the first DC power converter are connected with the second DC power converter；
First DC power converter is connect with voltage monitoring circuit and telecommunication circuit respectively；Voltage monitoring circuit includes using
In the resistance R17 of voltage sample；Telecommunication circuit includes microcontroller MPC5775 chip and connects with microcontroller MPC5775 chip
The DC power supply circuit connect；DC power supply circuit is connect by its built-in SPI communication module with microcontroller MPC5775 chip；
First low pressure difference linear voltage regulator is connect with the second low pressure difference linear voltage regulator and isolator respectively；Second DC power converter
It is connect with third low pressure difference linear voltage regulator.
It preferably, is 7.5K Ω for the resistance value of the resistance R17 of voltage sample.
Preferably, FS6500 power supply chip built in DC power supply circuit which is provided with several non-security output ports.
Preferably, the first DC power converter exports 1.25V voltage and 3.3V voltage respectively, and maximum output current is
2A。
Preferably, the second DC power converter exports 3.8V voltage, third low pressure difference linear voltage regulator connected to it
Export 3.3V voltage.
Preferably, the model FS6500 DC power converter of the first DC power converter, the second DC power supply turn
The model LMR14020 DC power converter of parallel operation.
Preferably, the model LP2951 low pressure difference linear voltage regulator of the first low pressure difference linear voltage regulator, the second low voltage difference
The model LP5907 low pressure difference linear voltage regulator of linear voltage regulator.
Automobile power source provided by the utility model protects circuit, has the advantages that
The utility model carries out High frequency filter by anti-electromagnetic compatibility circuit and electromagnetism is eliminated, and improves the anti-interference energy of power supply
Power, and voltage monitoring circuit and telecommunication circuit are accessed in the input terminal of the first DC power converter, the electricity of power supply is acquired in real time
Pressure value, and information of voltage is transmitted to by control terminal by telecommunication circuit.The power supply for being currently used for car radar is efficiently solved,
The problem of being easy to be interfered, and supply voltage cannot being monitored in real time.
Detailed description of the invention
Fig. 1 is the system block diagram that automobile power source protects circuit.
Fig. 2 and Fig. 3 is the anti-electromagnetic compatibility circuit that automobile power source protects circuit.
Fig. 4 is the voltage monitoring circuit that automobile power source protects circuit.
Fig. 5 is the DC power supply circuit that automobile power source protects circuit.
Fig. 6 is the microcontroller MPC5775 chip and its peripheral circuit that automobile power source protects circuit.
Specific embodiment
Specific embodiment of the present utility model is described below, in order to facilitate understanding by those skilled in the art
The utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the utility model spirit and scope in,
These variations are it will be apparent that all are created using the utility model of the utility model design in the column of protection.
According to one embodiment of the application, with reference to Fig. 1, a kind of automobile power source of this programme protects circuit, including anti-electricity
Magnetic compatible circuit, anti-electromagnetic compatibility circuit respectively with the first low pressure difference linear voltage regulator, the first DC power converter and second
DC power converter connection.
Referring to figs. 2 and 3, anti-electromagnetic compatibility circuit for filter high frequency noise and eliminates electromagnetic interference, improves power supply electricity
The stability of pressure.Wherein, core component is patch ferrite bean and the common mode chokes being arranged in parallel with patch ferrite bean
Circle.Patch ferrite bean has very high resistivity and magnetic conductivity, the series connection of resistance and inductance is equivalent to, for filtering out high frequency
Noise；Common mode choke is equivalent to a bidirectional filter, and one side filters out the suppression common mode electromagnetic interference on signal wire, another party
Face inhibits itself not send out electromagnetic interference, avoids the normal work for influencing other electronic equipments under same electromagnetic environment.
Anti- electromagnetic compatibility circuit further includes the circuit being made of LM74610QDGKRQ1 chip and diode SMBJ26A-13-F, for hindering
Disconnected backward voltage, and then protect circuit.
With reference to Fig. 1 and Fig. 4, the first DC power converter is connect with voltage monitoring circuit and telecommunication circuit respectively；Voltage
The sampling resistor monitored in circuit includes resistance R16, R17 and R54, since the resistance value of R16 and R54 is far longer than the resistance value of R17,
Therefore choose the sampling that resistance R17 carries out voltage.
Connect with reference to Fig. 5 and Fig. 6, FS6500 built-in chip type SPI communication module and with the digital signal of MPC5775 control chip
It connects, is communicated to connect between FS6500 power supply chip and microcontroller MPC5575 chip by SPI interface.Microcontroller MPC5575
Chip is connect with the non-security output state of FS6500 chip, by MPC5775 chip transmit this information to host computer or
Monitor terminal realizes the real time monitoring of supply voltage.
With reference to Fig. 1, the first low pressure difference linear voltage regulator is connect with the second low pressure difference linear voltage regulator and isolator respectively；The
Two DC power converters are connect with third low pressure difference linear voltage regulator.First DC power converter exports 1.25V electricity respectively
Pressure and 3.3V voltage, maximum output current 2A.Second DC power converter exports 3.8V voltage, third connected to it
Low pressure difference linear voltage regulator exports 3.3V voltage.The output for realizing 1.25V, 3.3V, 3.8V and 4.5V of supply voltage, increases
Its adaptability.
The utility model carries out High frequency filter by anti-electromagnetic compatibility circuit and electromagnetism is eliminated, and improves the anti-interference energy of power supply
Power, acquires the voltage value of power supply in real time, and information of voltage is transmitted to control terminal by telecommunication circuit.It efficiently solves existing
For the power supply of car radar, the problem of being easy to be interfered, and cannot be monitored in real time to supply voltage, have relatively strong
Practicability.
Although being described in detail in conjunction with specific embodiment of the attached drawing to utility model, should not be construed as to this
The restriction of the protection scope of patent.In range described by claims, those skilled in the art are without creative work
The various modifications and deformation that can make still belong to the protection scope of this patent.
Claims (7)
1. a kind of automobile power source protects circuit, it is characterised in that: including anti-electromagnetic compatibility circuit；The anti-electromagnetic compatibility circuit point
It is not connect with the first low pressure difference linear voltage regulator, the first DC power converter and the second DC power converter；
First DC power converter is connect with voltage monitoring circuit and telecommunication circuit respectively；Voltage monitoring circuit includes using
In the resistance R17 of voltage sample；The telecommunication circuit include microcontroller MPC5775 chip and with microcontroller MPC5775 core
The DC power supply circuit of piece connection；The DC power supply circuit passes through its built-in SPI communication module and microcontroller MPC5775 core
Piece connection；First low pressure difference linear voltage regulator is connect with the second low pressure difference linear voltage regulator and isolator respectively；Described
Two DC power converters are connect with third low pressure difference linear voltage regulator.
2. automobile power source according to claim 1 protects circuit, it is characterised in that: the resistance for voltage sample
The resistance value of R17 is 7.5K Ω.
3. automobile power source according to claim 1 protects circuit, it is characterised in that: built in the DC power supply circuit
FS6500 power supply chip which is provided with several non-security output ports.
4. automobile power source according to claim 1 protects circuit, it is characterised in that: first DC power converter point
Not Shu Chu 1.25V voltage and 3.3V voltage, maximum output current 2A.
5. automobile power source according to claim 1 protects circuit, it is characterised in that: second DC power converter is defeated
3.8V voltage out, third low pressure difference linear voltage regulator connected to it export 3.3V voltage.
6. automobile power source according to claim 1 protects circuit, it is characterised in that: first DC power converter
Model FS6500 DC power converter, the model LMR14020 DC power converter of the second DC power converter.
7. automobile power source according to claim 1 protects circuit, it is characterised in that: first low pressure difference linear voltage regulator
Model LP2951 low pressure difference linear voltage regulator, the model LP5907 low pressure difference linearity of the second low pressure difference linear voltage regulator is steady
Depressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820986438.5U CN208285220U (en) | 2018-06-26 | 2018-06-26 | A kind of automobile power source protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820986438.5U CN208285220U (en) | 2018-06-26 | 2018-06-26 | A kind of automobile power source protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208285220U true CN208285220U (en) | 2018-12-25 |
Family
ID=64699387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820986438.5U Expired - Fee Related CN208285220U (en) | 2018-06-26 | 2018-06-26 | A kind of automobile power source protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208285220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782235A (en) * | 2019-01-30 | 2019-05-21 | 成都西科微波通讯有限公司 | A kind of anti-jamming circuit of 77GHz automobile collision avoidance radar |
-
2018
- 2018-06-26 CN CN201820986438.5U patent/CN208285220U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782235A (en) * | 2019-01-30 | 2019-05-21 | 成都西科微波通讯有限公司 | A kind of anti-jamming circuit of 77GHz automobile collision avoidance radar |
| CN109782235B (en) * | 2019-01-30 | 2023-09-05 | 成都西科微波通讯有限公司 | Anti-interference circuit of 77GHz automobile anti-collision radar |
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| 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: 20181225 |