CN208423817U - Voltage adaptive power circuit - Google Patents
Voltage adaptive power circuit Download PDFInfo
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- CN208423817U CN208423817U CN201820133759.0U CN201820133759U CN208423817U CN 208423817 U CN208423817 U CN 208423817U CN 201820133759 U CN201820133759 U CN 201820133759U CN 208423817 U CN208423817 U CN 208423817U
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Abstract
The utility model discloses a kind of voltage adaptive power circuit, the voltage adaptive power circuit includes: the first power-switching circuit and second source conversion circuit；First power-switching circuit is when automobile storage battery electric power output voltage is lower than the first setting voltage, by the automobile storage battery power boost to the first setting voltage；When automobile storage battery supply voltage is greater than or equal to the first setting voltage, the automobile storage battery supply voltage is directly exported；The second source conversion circuit is depressured the out-put supply of first power-switching circuit, and exports the second setting voltage.Voltage adaptive power circuit provided by the utility model can be used for adapting to large range of automobile storage battery voltage input by booster circuit and reduction voltage circuit, unnecessary use Width funtion when automobile storage battery type selecting is set to export storage battery, so that automobile storage battery is easy for installation, cost is reduced.
Description
Technical field
The utility model relates to technical field of automotive electronics more particularly to a kind of voltage adaptive power circuits.
Background technique
Vehicular data acquisition box and display equipment mainly carry out the power supply of system, existing car data by automobile storage battery
The storage battery output voltage of 24V is mainly depressured by collecting cassette, and is automobile using the voltage after decompression as system power supply power supply
Data acquisition box and display equipment power supply.When the output voltage of automobile storage battery is 12V, at this point, using 24V supply voltage as defeated
The vehicular data acquisition box entered can not work normally；When the output voltage of automobile storage battery is 24V, at this point, with 12V supply voltage
Vehicular data acquisition box as input can not work normally.
In existing solution, storage battery is mainly exported using Width funtion in automobile storage battery.It can be according to vehicular data acquisition
Box the suitable level of required voltage output (such as: 12V or 24V).But Width funtion output storage battery is bulky, it is interior
Space is relatively limited, so that the installation of Width funtion output storage battery is relatively inconvenient.In addition, the price of Width funtion output storage battery is opposite
It is expensive.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose a kind of voltage adaptive power circuit with a novel purpose.
To achieve the above object, according to the voltage adaptive power circuit of the utility model embodiment, the voltage is adaptive
The power circuit is answered to include:
First power-switching circuit, first power-switching circuit are connect with automobile storage battery power supply, first power supply
Conversion circuit by the automobile storage battery power boost and is exported when automobile storage battery electric power output voltage is lower than the first setting voltage
The first setting voltage；When automobile storage battery supply voltage is greater than or equal to the first setting voltage, by the automobile electricity
Bottle supply voltage directly exports；
Second source conversion circuit, out-put supply of the second source conversion circuit to first power-switching circuit
It is depressured, and exports the second setting voltage.
One embodiment according to the present utility model, first power-switching circuit include the first power supply conversion electricity
Road includes the first front-end processing circuit, first control circuit, the first DC-DC voltage up converting circuit and the first rear class filtering circuit,
First front-end processing circuit is connect with the first control circuit, the first control circuit and the first DC-DC liter
Voltage conversion circuit connection, the first DC-DC voltage up converting circuit and the first rear class filtering circuit connection；
The second source conversion circuit includes the second front-end processing circuit, second control circuit, the 2nd DC-DC decompression
Conversion circuit and the second rear class filtering circuit, second front-end processing circuit are connect with the second control circuit, and described
Two control circuits are connect with the DC-DC decompression converting circuit, the 2nd DC-DC decompression converting circuit and second rear class
Filter circuit connection.
One embodiment according to the present utility model, first power-switching circuit include: boost pressure controller U5 and its
Peripheral circuit；
The peripheral circuit includes resistance R74, resistance R75, inductance L3, diode D10, capacitor C43, resistance R78 and electricity
Hinder R79；
The resistance R74 and resistance R73 are serially connected, and are that the boost pressure controller U5 is mentioned after dividing to the first power supply
For supply voltage；
The one end the inductance L3 is connect with the automobile storage battery power supply, the switch of the other end and the boost pressure controller U5
Control terminal connection, the switch control terminal of the boost pressure controller U5 are also connect with the anode of diode D10, the diode D10
Cathode connect with one end of the resistance R78, the other end of the resistance R78 is connect with one end of resistance R79, the electricity
The other end for hindering R79 is connect with reference, and the feedback end of the other end of the resistance R78 and the boost pressure controller U5 connect
It connects；The cathode of the diode D10 is also connect with one end of the capacitor C43, and the other end and reference ground of the capacitor C43 is even
It connects；
The resistance R78, resistance R79, inductance L3, diode D10, capacitor C43 and switch controller of power supply U5 constitute electricity
Source boosting and filter regulator circuit；
The resistance R78 and resistance R79 are connected into voltage branch circuit, by the output of the switch controller of power supply U5
After voltage, the pressure feedback port of the switch controller of power supply U5 is fed back to.
One embodiment according to the present utility model, the second source conversion circuit include: buck controller U4 and its
Peripheral circuit；
The peripheral circuit includes: diode D3, inductance L2, capacitor C29, resistance R41 and resistance R42；
The cathode of the diode D3 is connect with the output end of the buck controller U4, the anode of the diode D3
It with reference connect, the output end of the buck controller U4 is also connect with one end of the inductance L2, and the inductance L2's is another
One end is connect with one end of the capacitor C29, and the other end of the capacitor C29 is connect with reference.
One embodiment according to the present utility model, further includes:
Single-chip microcontroller；
Second source switch control module, the second source switch control module respectively with the single-chip microcontroller and described
The connection of two power-switching circuits, the second source switch control module open second source conversion circuit under single-chip microcontroller effect
It opens or closes；
One embodiment according to the present utility model, the second source switch control module include resistance R15 and resistance
R16；
The one end the resistance R15 is connect with the single-chip microcontroller control terminal, and the other end of the resistance R15 and the decompression are controlled
The enable end of device U4 processed connects；One end of the resistance R16 is connect with described one end of the resistance R15, the resistance R16's
The other end is connect with reference；
One embodiment according to the present utility model further includes storage battery front-end processing circuit；The storage battery front-end processing electricity
It is anti-reverse that road carries out deglitch current limliting to the supply voltage that storage battery exports.
One embodiment according to the present utility model, the storage battery front-end processing circuit include diode D6, transient supression
Diode DV2 and capacitor C36；
The anode of the diode D6 is connect with automobile storage battery power output end, the cathode of the diode D6 respectively with institute
The power input connection of the one end transient supression diode DV2, one end of capacitor C36 and first power-switching circuit is stated,
The other end of the transient supression diode DV2 is connect with reference, and the other end of the capacitor C36 is connect with reference.
Voltage adaptive power circuit provided by the embodiment of the utility model is electric by automobile by the first power-switching circuit
Bottle power supply boosts, then is depressured by second source conversion circuit.Realize the output (such as: 12V) of setting amplitude voltage.Its
In, the first power-switching circuit voltage be greater than first setting voltage (such as: 16V) when, booster circuit not to input voltage into
The conversion of row voltage；When input voltage is lower than first setting voltage (such as: 16V), first power-switching circuit is defeated to storage battery
Enter to boost.Then it is depressured by the second source conversion circuit, i.e., the power supply of exportable setting voltage magnitude is (as stablized
12V), large range of automobile storage battery voltage input is adapted to.To compatible 12V and 24 volt of automobile storage battery input, and export steady
The power supply of constant voltage value is powered to vehicle electronics, guarantees the stability of system.In addition, unnecessary when making automobile storage battery type selecting
Storage battery is exported using Width funtion, so that automobile storage battery is easy for installation, reduces cost.
Detailed description of the invention
Fig. 1 is automotive voltage adaptive power supply power supply circuit construction schematic diagram provided by the embodiment of the utility model；
Fig. 2 is the first power-switching circuit structural schematic diagram provided by the embodiment of the utility model；
Fig. 3 is second source converting circuit structure schematic diagram provided by the embodiment of the utility model.
Appended drawing reference:
First power-switching circuit 10；
Second source conversion circuit 20；
Automobile storage battery power supply 30；
Storage battery front-end processing circuit 40；
Second source switch control module 50.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described.Unless otherwise defined,
All technical and scientific terms used herein are generally understood with person skilled in the technical field of the present invention
Meaning it is identical.Terminology used in the description of the utility model herein is intended merely to description specific embodiment
Purpose, it is not intended that in limitation the utility model.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the utility model., which there is the phrase, in each position in the description to be each meant
Identical embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art are explicit
Ground and implicitly understand, embodiment described herein can be combined with other embodiments.
Refering to fig. 1, Fig. 1 is automotive voltage adaptive power supply power supply circuit construction provided by the embodiment of the utility model signal
Figure；
It includes: the first power supply conversion electricity that the utility model embodiment, which provides a kind of automotive voltage adaptive power supply power supply circuit,
Road 10 and second source conversion circuit 20；First power-switching circuit 10 is connect with automobile storage battery power supply 30, and described first
Power-switching circuit 10 is when 30 output voltage of automobile storage battery power supply is lower than the first setting voltage, by the automobile storage battery power supply 30
It boosts and exports the first setting voltage；When 30 voltage of automobile storage battery power supply is greater than or equal to the first setting voltage,
30 voltage of automobile storage battery power supply is directly exported；The second source conversion circuit 20 is to first power-switching circuit
10 out-put supply is depressured, and exports the second setting voltage.
Specifically, often needing to obtain power supply from automobile storage battery, and convert and export by voltage in vehicle electronics
The such as stable 12V of the stable voltage of setting.When the output voltage amplitude of automobile storage battery is 24V, it is only necessary to by 24V power supply
It is depressurized to 12V output.And when automobile storage battery output voltage is 12V (actual output voltage may be between 9V to 16V).
At this point, the voltage of automobile power source output is likely lower than supply voltage required for the automotive electronics.At this point, voltage source exports
May cause electronic equipment can not work normally.In the utility model embodiment, pass through first power-switching circuit 10
Automobile storage battery output supply voltage is boosted, boost to the first setting voltage (such as: 16V), then by it is described second electricity
Power-switching circuit 20 is depressured the output of the booster circuit, to export the second stable setting voltage (as stablized
12V)。
When the output voltage of automobile storage battery is 24V, first power-switching circuit 10 is booster circuit.At this point, by
It is higher than the first setting voltage in the input voltage of first power-switching circuit 10；First power-switching circuit 10
Voltage conversion is not carried out to input voltage, the battery power voltage is directly exported, then passes through second source conversion circuit
The output of 20 pairs of first power-switching circuits 10 is depressured, to export the second stable setting voltage (as stablized
12V)。
Voltage adaptive power circuit provided by the embodiment of the utility model passes through the first power-switching circuit 10 for automobile
Battery power boosts, then is depressured by second source conversion circuit 20.Realize the output (such as: 12V) of setting amplitude voltage.
Wherein, the first power-switching circuit 10 does not carry out electricity to input voltage when voltage is greater than first setting voltage (such as: 16V)
Pressure conversion；When input voltage is lower than first setting voltage (such as: 16V), first power-switching circuit 10 inputs storage battery
It boosts.Then it is depressured by the second source conversion circuit 20, i.e., the power supply of exportable setting voltage magnitude is (as surely
Determine 12V), adapt to large range of automobile storage battery voltage input.To compatible 12V and 24 volt of automobile storage battery input, and export
The power supply of stable voltage is powered to vehicle electronics, guarantees the stability of system.In addition, need not when making automobile storage battery type selecting
Storage battery is exported using Width funtion, so that automobile storage battery is easy for installation, reduce cost.
Further, in one embodiment of the utility model, first power-switching circuit 10 includes described the
One power-switching circuit includes the first front-end processing circuit, first control circuit, the first DC-DC voltage up converting circuit and first
Rear class filtering circuit, first front-end processing circuit are connect with the first control circuit, the first control circuit and institute
The connection of the first DC-DC voltage up converting circuit is stated, the first DC-DC voltage up converting circuit and the first rear class filtering circuit connect
It connects；The second source conversion circuit 20 includes the second front-end processing circuit, second control circuit, the 2nd DC-DC decompression conversion
Circuit and the second rear class filtering circuit, second front-end processing circuit are connect with the second control circuit, second control
Circuit processed is connect with the DC-DC decompression converting circuit, and the 2nd DC-DC decompression converting circuit and second rear class are filtered
Wave circuit connection.Pass through first front-end processing circuit, first control circuit, the first DC-DC voltage up converting circuit and first
Rear class filtering circuit carries out modularized design to first power-switching circuit.In addition, passing through the second front-end processing electricity
Road, second control circuit, two DC-DC decompression converting circuits and the second rear class filtering circuit to the second source conversion circuit into
Row modularized design.
Referring to Fig.2, Fig. 2 is 10 structural schematic diagram of the first power-switching circuit provided by the embodiment of the utility model.
Further, in one embodiment of the utility model, first power-switching circuit 10 includes: boosting control
Device U5 and its peripheral circuit processed；The peripheral circuit include resistance R74, resistance R75, inductance L3, diode D10, capacitor C43,
Resistance R78 and resistance R79；The resistance R74 and resistance R73 are serially connected, and are the boosting after dividing to the first power supply
Controller U5 provides supply voltage；The one end the inductance L3 is connect with the automobile storage battery power supply, and the other end and the boosting are controlled
The switch control terminal SW connection of device U5 processed, the switch control terminal SW of the boost pressure controller U5 also connect with the anode of diode D10
It connects, the cathode of the diode D10 is connect with one end of the resistance R78, and the other end of the resistance R78 is with resistance R79's
The other end of one end connection, the resistance R79 is connect with reference, and the other end of the resistance R78 and the boosting are controlled
The feedback end of device U5 processed connects；The cathode of the diode D10 is also connect with one end of the capacitor C43, the capacitor C43's
The other end is connect with reference；The resistance R78, resistance R79, inductance L3, diode D10, capacitor C43 and power supply conversion and control
Device U5 constitutes power boost and filter regulator circuit；The resistance R78 and resistance R79 are connected into voltage branch circuit, will be described
After the output voltage partial pressure of switch controller of power supply U5, the pressure feedback port of the switch controller of power supply U5 is fed back to.
The utility model embodiment constitutes switching power circuit to defeated by the boost pressure controller U5 and its peripheral circuit
Enter power supply to boost.The boost pressure controller U5 switch power controller.
Refering to Fig. 3, Fig. 3 be 20 structural schematic diagram voltage of second source conversion circuit provided by the embodiment of the utility model from
Adapt to power circuit.
Further, in one embodiment of the utility model, the second source conversion circuit 20 includes: decompression control
Device U4 and its peripheral circuit processed；The peripheral circuit includes: diode D3, inductance L2, capacitor C29, resistance R41 and resistance R42；
The cathode of the diode D3 is connect with the output end PH of the buck controller U4, the anode of the diode D3 and reference
Ground connection, the output end PH of the buck controller U4 are also connect with one end of the inductance L2, the other end of the inductance L2
It is connect with one end of the capacitor C29, the other end of the capacitor C29 is connect with reference；Capacitor C29 be out-put supply into
Row filtering；Inductance L2 carries out energy storage；Diode D3 is freewheeling diode, the inductance L2, diode D3, capacitor C29 and power supply
Switching controller U4 constitutes power voltage step down and filter regulator circuit.
The utility model embodiment constitutes switching power circuit by the boost pressure controller U4 and its peripheral circuit, to defeated
Enter power supply to be depressured.The boost pressure controller U4 switch power controller.
Further, in one embodiment of the utility model, further includes: single-chip microcontroller (not shown) and second source
Switch control module 50, the second source switch control module 50 are electric with the single-chip microcontroller and second source conversion respectively
Road 50 connects, and the second source switch control module 50 makes second source conversion circuit 20 open or close under single-chip microcontroller effect
It closes.
It is opened or closed specifically, the single-chip microcontroller controls the second source conversion circuit 20, so as to be waited in system
When machine, 20 out-put supply of second source conversion circuit is closed, realizes low-power consumption.
Further, in one embodiment of the utility model, the second source switch control module includes resistance
R15 and resistance R16；The one end the resistance R15 is connect with the single-chip microcontroller control terminal, the other end of the resistance R15 with it is described
The enable end EN connection of buck controller U4；One end of the resistance R16 is connect with described one end of the resistance R15, described
The other end of resistance R16 is connect with reference.
Voltage adaptive power circuit provided by the embodiment of the utility model passes through single-chip microcontroller and second source switch control
Module realizes the shutdown of output voltage, saves the power supply of storage battery.
It further, further include storage battery front-end processing circuit 40 in one embodiment of the utility model；The storage battery
It is anti-reverse that front-end processing circuit 40 carries out deglitch current limliting to the supply voltage that storage battery exports.
Further, in one embodiment of the utility model, the storage battery front-end processing circuit 40 includes diode
D6, transient supression diode DV2 and capacitor C36；The anode of the diode D6 is connect with 30 output end of automobile storage battery power supply, institute
State the cathode of diode D6 respectively with described one end transient supression diode DV2, one end of capacitor C36 and first power supply
The power input of conversion circuit connects, and the other end of the transient supression diode DV2 is connect with reference, the capacitor
The other end of C36 is connect with reference.
Specifically, it is anti-to carry out deglitch current limliting to the supply voltage that storage battery exports by the storage battery front-end processing circuit 40
Reversal connection.
The above is only the embodiments of the present invention, are not intended to limit the scope of the patents of the utility model, although referring to before
Embodiment is stated the utility model is described in detail, it, still can be right for coming for those skilled in the art
Technical solution documented by aforementioned each specific embodiment is modified, or carries out equivalent replace to part of technical characteristic
It changes.All equivalent structures done using the utility model specification and accompanying drawing content are directly or indirectly used in other correlations
Technical field, similarly within the utility model patent protection scope.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and
Modification.
Claims (8)
1. a kind of voltage adaptive power circuit, which is characterized in that the voltage adaptive power circuit includes:
First power-switching circuit, first power-switching circuit are connect with automobile storage battery power supply, the first power supply conversion
Circuit by the automobile storage battery power boost and is exported when the automobile storage battery electric power output voltage is lower than the first setting voltage
The first setting voltage；When automobile storage battery supply voltage is greater than or equal to the first setting voltage, by the automobile electricity
Bottle supply voltage directly exports；
Second source conversion circuit, the second source conversion circuit carry out the out-put supply of first power-switching circuit
Decompression, and export the second setting voltage.
2. voltage adaptive power circuit according to claim 1, which is characterized in that the first power-switching circuit packet
The first front-end processing circuit, first control circuit, the first DC-DC voltage up converting circuit and the first rear class filtering circuit are included, it is described
First front-end processing circuit is connect with the first control circuit, and the first control circuit and the first DC-DC boosting turn
Change circuit connection, the first DC-DC voltage up converting circuit and the first rear class filtering circuit connection；
The second source conversion circuit includes the second front-end processing circuit, second control circuit, the 2nd DC-DC decompression conversion electricity
Road and the second rear class filtering circuit, second front-end processing circuit are connect with the second control circuit, second control
Circuit is connect with the DC-DC decompression converting circuit, the 2nd DC-DC decompression converting circuit and second rear class filtering electricity
Road connection.
3. voltage adaptive power circuit according to claim 1, which is characterized in that the first power-switching circuit packet
It includes: boost pressure controller U5 and its peripheral circuit；The peripheral circuit include resistance R74, resistance R75, inductance L3, diode D10,
Capacitor C43, resistance R78 and resistance R79；
The resistance R74 and resistance R73 are serially connected, and provide confession after dividing to the first power supply for the boost pressure controller U5
Piezoelectric voltage；
The one end the inductance L3 is connect with the automobile storage battery power supply, the switch control terminal of the other end and the boost pressure controller U5
Connection, the switch control terminal of the boost pressure controller U5 are also connect with the anode of diode D10, the cathode of the diode D10
It is connect with one end of the resistance R78, the other end of the resistance R78 is connect with one end of resistance R79, the resistance R79's
The other end is connect with reference, and the other end of the resistance R78 is connect with the feedback end of the boost pressure controller U5；It is described
The cathode of diode D10 is also connect with one end of the capacitor C43, and the other end of the capacitor C43 is connect with reference；
The resistance R78, resistance R79, inductance L3, diode D10, capacitor C43 and switch controller of power supply U5 constitute power supply liter
Pressure and filter regulator circuit；The resistance R78 and resistance R79 are connected into voltage branch circuit, by the switch controller of power supply
After the output voltage partial pressure of U5, the pressure feedback port of the switch controller of power supply U5 is fed back to.
4. voltage adaptive power circuit according to claim 1, which is characterized in that the second source conversion circuit packet
It includes: buck controller U4 and its peripheral circuit；The peripheral circuit include diode D3, inductance L2, capacitor C29, resistance R41 and
Resistance R42；The cathode of the diode D3 is connect with the output end of the buck controller U4, the anode of the diode D3 with
It is connected with reference to ground, the output end of the buck controller U4 is also connect with one end of the inductance L2, and the inductance L2's is another
End is connect with one end of the capacitor C29, and the other end of the capacitor C29 is connect with reference.
5. voltage adaptive power circuit according to claim 4, which is characterized in that further include:
Single-chip microcontroller；
Second source switch control module, the second source switch control module respectively with the single-chip microcontroller and it is described second electricity
Power-switching circuit connection, the second source switch control module single-chip microcontroller effect under make second source conversion circuit open or
It closes.
6. voltage adaptive power circuit according to claim 5, which is characterized in that the second source switch control mould
Block includes resistance R15 and resistance R16；
The one end the resistance R15 is connect with the single-chip microcontroller control terminal, the other end and the buck controller of the resistance R15
The enable end of U4 connects；One end of the resistance R16 is connect with described one end of the resistance R15, and the resistance R16's is another
End is connect with reference.
7. voltage adaptive power circuit according to claim 1, which is characterized in that further include storage battery front-end processing electricity
Road；It is anti-reverse that the storage battery front-end processing circuit carries out deglitch current limliting to the supply voltage that storage battery exports.
8. voltage adaptive power circuit according to claim 7, which is characterized in that the storage battery front-end processing circuit packet
It includes, diode D6, transient supression diode DV2 and capacitor C36；
The anode of the diode D6 is connect with automobile storage battery power output end, the cathode of the diode D6 respectively with the wink
Become the power input connection for inhibiting the one end diode DV2, one end of capacitor C36 and first power-switching circuit, it is described
The other end of transient supression diode DV2 is connect with reference, and the other end of the capacitor C36 is connect with reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820133759.0U CN208423817U (en) | 2018-01-25 | 2018-01-25 | Voltage adaptive power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820133759.0U CN208423817U (en) | 2018-01-25 | 2018-01-25 | Voltage adaptive power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208423817U true CN208423817U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820133759.0U Active CN208423817U (en) | 2018-01-25 | 2018-01-25 | Voltage adaptive power circuit |
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| CN (1) | CN208423817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165881A (en) * | 2019-06-17 | 2019-08-23 | 北京信达众联科技有限公司 | Vehicle power supply detection and rear dress equipment protection circuit |
| CN110417095A (en) * | 2019-08-08 | 2019-11-05 | 广州龙之杰科技有限公司 | A kind of air pressure output device and method adapting to Width funtion |
-
2018
- 2018-01-25 CN CN201820133759.0U patent/CN208423817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165881A (en) * | 2019-06-17 | 2019-08-23 | 北京信达众联科技有限公司 | Vehicle power supply detection and rear dress equipment protection circuit |
| CN110417095A (en) * | 2019-08-08 | 2019-11-05 | 广州龙之杰科技有限公司 | A kind of air pressure output device and method adapting to Width funtion |
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