CN209692341U - A kind of mobile unit protection circuit - Google Patents
A kind of mobile unit protection circuit Download PDFInfo
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- CN209692341U CN209692341U CN201920738821.3U CN201920738821U CN209692341U CN 209692341 U CN209692341 U CN 209692341U CN 201920738821 U CN201920738821 U CN 201920738821U CN 209692341 U CN209692341 U CN 209692341U
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Abstract
The utility model discloses a kind of mobile units to protect circuit, including sequentially connected anti-reverse module, overcurrent protection module, over-voltage shutdown module, under-voltage protection and soft-start module and voltage transformation module；Power input connects anti-reverse module, and power output end connects voltage transformation module.Solves vehicle electronic device safety protection problem; the low-voltage that the high voltage of input is converted to output is acted on using inductance, the excitation energy storage effect of capacitor and the afterflow of diode; guarantee the conservation of energy by the intermittent charge and discharge to above-mentioned inductance, capacitor; consume of the conversion process on component is smaller; to ensure that the conversion ratio of circuit energy; energy-saving effect is reached, there is very strong real-time and reliability, different parameter requests can be flexibly applied to.
Description
Technical field
The utility model relates to mobile units for electrical domain, and in particular to a kind of mobile unit protection circuit.
Background technique
Mobile unit is powered by electric motor of automobile, and existing automobile power supply bad environments, and power-supply fluctuation is larger, and adjoint
The rigor conditions such as voltage high impulse, electromagnetic radiation, Bulk current injection.Therefore, it needs to input motor when mobile unit electricity consumption
Voltage converted, to adapt to the fluctuation of power supply.
Existing mobile unit mostly uses linear reduction voltage circuit to adapt to power-supply fluctuation, and still, this circuit calorific value is big,
Energy conversion efficiency is low, and when input voltage is much larger than output voltage, circuit transformation efficiency will become at a fairly low, is not suitable for big
The application of power apparatus.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides a kind of mobile unit protection circuit, improves conversion
Efficiency has saved automobile energy.
To achieve the above object, the utility model uses following technical scheme:
A kind of mobile unit protects circuit, characterized in that including sequentially connected anti-reverse module, overcurrent protection module,
Over-voltage turns off module, under-voltage protection and soft-start module and voltage transformation module；Power input connects anti-reverse module, electricity
Source output terminal connects voltage transformation module.
Further, the anti-reverse module includes diode D1, and diode D1 anode connects power input, diode
The output end of D1 cathode connection anti-reverse module.
Further, one end of the input terminal connection fuse F1 of the overcurrent protection module, the fuse F1 other end point
Not Lian Jie diode D2 cathode, one end of capacitor C1, one end of capacitor C2 and inductance L1 one end, anode, the electricity of diode D2
Hold the other end of C1 and the other end ground connection of capacitor C2, one end of the other end of inductance L1, one end of capacitor C3 and capacitor C4 connects
Connect overcurrent protection module output end, the other end of capacitor C3 and the other end ground connection of capacitor C4.
Further, the input terminal of the over-voltage shutdown module connects one end of resistance R1, the pole E of triode Q1, two poles
The cathode of pipe D4, one end of capacitor C5 and field-effect tube Q2 the pole S, the other end of the resistance R1 is separately connected triode Q1
The pole B and resistance R2 one end, resistance R2 the other end connection diode D3 cathode, the plus earth of diode D3；Field effect
Should pipe Q2 the pole D connection over-voltage turn off module output end, the pole G connect resistance R3 one end, the other end, the triode of resistance R3
The other end of the pole C of Q1, the anode of diode D4 and capacitor C5 passes through resistance R4 respectively and is grounded.
Further, the under-voltage protection and soft-start module include chip U1, chip U1 model LM50, LM50's
Pin 1 connects one end of capacitor C10, the other end connection under-voltage protection of capacitor C10 and soft-start module output end；Pin 2 one
Road connects one end of resistance R5, and another way connects under-voltage protection and soft-start module input terminal；Pin 3 connects the another of resistance R5
One end, and be grounded by resistance R6；Pin 4 is grounded by resistance R7；Pin 5 is grounded by resistance R10；The connection of 6 one tunnel of pin
Capacitor C11, and be grounded by resistance R8, another way is grounded by capacitor C12；Pin 7 is grounded；Pin 8 connect under-voltage protection and
Soft-start module output end.
Further, the input terminal of the voltage transformation module connects the cathode of diode D5, another way connection electricity all the way
Feel one end of L2；The other end of the plus earth of diode D5, inductance L2 connects power output end；Capacitor C13, capacitor C14 and
One end of capacitor C15 connects power output end, other end ground connection；The anode connection power output end of capacitor C16, cathode ground connection；
The cathode of diode D6 connects power output end, cathode ground connection；The one end resistance R9 connects power output end, and the other end passes through resistance
R10 ground connection.
Further, it is serially connected between the over-voltage shutdown module output end and under-voltage protection and soft-start module input terminal
In parallel capacitor C6, capacitor C7, capacitor C8 and capacitor C9, the capacitor C6, capacitor C7, capacitor C8 and capacitor C9 ground connection.
The beneficial effects of the utility model are:
The utility model provides a kind of mobile unit protection circuit, solves vehicle electronic device safety protection problem,
Anti-reverse protection is carried out using diode；Overcurrent surge protection is realized using resettable fuse, diode, capacitor and inductance；
Parameter is turned off using resistance, diode, capacitor, field-effect tube, triode configurations over-voltage, realizes over-voltage shutdown protection；Utilize electricity
The high voltage of input is converted to the low-voltage of output by sense, the excitation energy storage effect of capacitor and the afterflow of diode effect, is passed through
The conservation of energy is guaranteed to the intermittent charge and discharge of above-mentioned inductance, capacitor, consume of the conversion process on component is smaller, to protect
The conversion ratio for having demonstrate,proved circuit energy, has reached energy-saving effect.
By the comparator arrangement under-voltage protection of chip interior, the overdischarge of automobile storage battery is effectively prevented, electricity is reduced
The burden in pond, to extend the service life of battery；The starting time of power supply is configured by the timer of chip interior, effectively
Ground prevents device power-up work to power supply bring load shock, can more be stopped when short trouble occurs in load circuit
The protection of power supply.
The utility model realizes protection using discrete device, has very strong real-time and reliability, can be with flexible Application
In different parameter requests.
Detailed description of the invention
Fig. 1 is the utility model circuit connection schematic diagram；
Fig. 2 is the utility model embodiment defencive function circuit diagram；
Fig. 3 is the utility model embodiment soft start and voltage conversion function circuit diagram；
Fig. 4 is the utility model chip LM50 logic control functional block diagram.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality
It is described in detail with novel.Following disclosure provides many different embodiments or example is used to realize the utility model
Different structure.In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.In addition,
The utility model can in different examples repeat reference numerals and/or letter.This repetition is for simplified and clear mesh
, the relationship between discussed various embodiments and/or setting itself is not indicated.It should be noted that illustrated in the accompanying drawings
Component is not drawn necessarily to scale.The description to known assemblies and treatment technology and process is omitted to avoid not in the utility model
Necessarily limit the utility model.
As shown in Figure 1, the utility model provides a kind of mobile unit protection circuit, for converting low-voltage for mobile unit
Power supply, including sequentially connected anti-reverse module, overcurrent protection module, over-voltage shutdown module, under-voltage protection and soft-start module
And voltage transformation module；Power input connects the anti-reverse module, and power output end connects the voltage transformation module.
Fig. 2-Fig. 4 is the circuit diagram of an embodiment of the present invention.
Fig. 2 is the embodiment defencive function circuit diagram.Power input Vin connection diode D1 anode, diode D1 are negative
Pole connects one end of fuse F1, and the fuse F1 other end is separately connected diode D2 cathode, one end of capacitor C1, capacitor C2
One end of one end and inductance L1, the other end ground connection of the anode of diode D2, the other end of capacitor C1 and capacitor C2, inductance L1
The other end, capacitor C3 one end the pole S of field-effect tube Q2, the other end and capacitor C4 of capacitor C3 are connected with one end of capacitor C4
The other end ground connection.One end of resistance R1, the pole E of triode Q1, the cathode of diode D4 and capacitor C5 one end also connect field
The pole S of effect pipe Q2, the other end of the resistance R1 are separately connected the pole B of triode Q1 and one end of resistance R2, resistance R2's
The other end connects the cathode of diode D3, the plus earth of diode D3；The pole the D connection soft start and voltage of field-effect tube Q2 turns
Change circuit, the pole G connects one end of resistance R3, the other end of resistance R3, the pole C of triode Q1, diode D4 anode and capacitor
The other end of C5 passes through resistance R4 respectively and is grounded.
Wherein, diode D1 plays anti-reverse protective effect；Resettable fuse F1, anti-thunder tube D2, capacitor C1-C4, electricity
Feel L1 and realizes overcurrent surge protection；Resistance R1-R4, diode D3-D4, capacitor C5, field-effect tube Q2, triode Q1 can spirits
Configuration over-voltage living turns off parameter.
Fig. 3 is the embodiment soft start and voltage conversion function circuit diagram.Wherein, chip U1 model LM50, logic
Control function block diagram is as shown in Figure 4.The pin 1 of LM50 connects one end of capacitor C10, and the other end of capacitor C10 connects under-voltage guarantor
Shield and soft-start module output end；2 one tunnel of pin connects one end of resistance R5, another way by the capacitor C6 of earth,
C7, C8 connect defencive function circuit with C9；Pin 3 connects the other end of resistance R5, and is grounded by resistance R6；Pin 4 passes through
Resistance R7 ground connection；Pin 5 is grounded by resistance R10；6 one tunnel of pin connects capacitor C11, and is grounded by resistance R8, another way
It is grounded by capacitor C12；Pin 7 is grounded；8 one tunnel of pin connects the cathode of diode D5, and another way connects one end of inductance L2；
The other end of the plus earth of diode D5, inductance L2 connects power output end；The one of capacitor C13, capacitor C14 and capacitor C15
End connection power output end Vout, other end ground connection；The anode connection power output end of capacitor C16, cathode ground connection；Diode D6
Cathode connect power output end, cathode ground connection；The one end resistance R9 connects power output end, and the other end is grounded by resistance R10.
Soft start and voltage conversion function circuit have using the comparator arrangement under-voltage protection inside the enabled pin 3 of U1
The overdischarge for preventing to effect automobile storage battery, reduces the burden of battery, to extend the service life of battery.The circuit is also
The starting time that power supply can be configured by the timer function inside the pin 6 of U1, it can effectively prevent device power-up work
Make the protection that can more carry out stopping power supply when short trouble occurs in load circuit to power supply bring load shock.Also fill
Divide and inductance L2, the excitation energy storage effect of capacitor C13-C16 and the afterflow of diode D5 effect is utilized, effectively by input
High voltage is converted to the low-voltage of Vout, by the way that the intermittent charge and discharge of L2 and C13-C16 are guaranteed with the conservation of energy, converts
Loss of the process on component is smaller, to ensure that high conversion ratio, to reach energy-efficient purpose, makes turning for voltage
It changes efficiency and is up to 90% or more.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope.To those of ordinary skill in the art, it can also make on the basis of the above description other
Various forms of modifications or deformation.There is no necessity and possibility to exhaust all the enbodiments.In the skill of the utility model
On the basis of art scheme, the various modifications or variations that can be made by those skilled in the art with little creative work still exists
Within the protection scope of the utility model.
Claims (7)
1. a kind of mobile unit protects circuit, characterized in that including sequentially connected anti-reverse module, overcurrent protection module, mistake
Pressure shutdown module, under-voltage protection and soft-start module and voltage transformation module；Power input connects anti-reverse module, power supply
Output end connects voltage transformation module.
2. a kind of mobile unit according to claim 1 protects circuit, characterized in that the anti-reverse module includes two poles
Pipe D1, diode D1 anode connect power input, and diode D1 cathode connects the output end of anti-reverse module.
3. a kind of mobile unit according to claim 1 protects circuit, characterized in that the input of the overcurrent protection module
One end of end connection fuse F1, the fuse F1 other end are separately connected diode D2 cathode, one end of capacitor C1, capacitor C2
One end of one end and inductance L1, the other end ground connection of the anode of diode D2, the other end of capacitor C1 and capacitor C2, inductance L1's
The other end, capacitor C3 one end overcurrent protection module output end, the other end and capacitor of capacitor C3 are connected with one end of capacitor C4
The other end of C4 is grounded.
4. a kind of mobile unit according to claim 1 protects circuit, characterized in that the input of the over-voltage shutdown module
Hold the S of the one end for connecting resistance R1, the pole E of triode Q1, the cathode of diode D4, one end of capacitor C5 and field-effect tube Q2
Pole, the other end of the resistance R1 are separately connected the pole B of triode Q1 and one end of resistance R2, the other end connection two of resistance R2
The cathode of pole pipe D3, the plus earth of diode D3；The pole the D connection over-voltage of field-effect tube Q2 turns off module output end, the connection of the pole G
One end of resistance R3, the other end of resistance R3, the pole C of triode Q1, the anode of diode D4 and capacitor C5 other end difference
It is grounded by resistance R4.
5. a kind of mobile unit according to claim 1 protects circuit, characterized in that the under-voltage protection and soft start mould
Block includes chip U1, and the pin 1 of chip U1 model LM50, LM50 connect one end of capacitor C10, and the other end of capacitor C10 connects
Connect under-voltage protection and soft-start module output end；2 one tunnel of pin connects one end of resistance R5, and another way connects under-voltage protection and soft
Starting module input terminal；Pin 3 connects the other end of resistance R5, and is grounded by resistance R6；Pin 4 is grounded by resistance R7；
Pin 5 is grounded by resistance R10；6 one tunnel of pin connects capacitor C11, and is grounded by resistance R8, and another way passes through capacitor C12
Ground connection；Pin 7 is grounded；Pin 8 connects under-voltage protection and soft-start module output end.
6. a kind of mobile unit according to claim 1 protects circuit, characterized in that the input of the voltage transformation module
End connects the cathode of diode D5 all the way, and another way connects one end of inductance L2；The plus earth of diode D5, inductance L2's is another
One end connects power output end；Capacitor C13, capacitor C14 and one end of capacitor C15 connect power output end, other end ground connection；Electricity
Hold the anode connection power output end of C16, cathode ground connection；The cathode of diode D6 connects power output end, cathode ground connection；Resistance
The one end R9 connects power output end, and the other end is grounded by resistance R10.
7. a kind of mobile unit according to claim 1 protects circuit, characterized in that the over-voltage turns off module output end
Capacitor C6 in parallel, capacitor C7, capacitor C8 and capacitor C9 are serially connected between under-voltage protection and soft-start module input terminal, it is described
Capacitor C6, capacitor C7, capacitor C8 and capacitor C9 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738821.3U CN209692341U (en) | 2019-05-22 | 2019-05-22 | A kind of mobile unit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738821.3U CN209692341U (en) | 2019-05-22 | 2019-05-22 | A kind of mobile unit protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209692341U true CN209692341U (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920738821.3U Active CN209692341U (en) | 2019-05-22 | 2019-05-22 | A kind of mobile unit protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245522A (en) * | 2018-08-23 | 2019-01-18 | 杭州乾程弘泰电力科技有限公司 | A kind of constant-voltage DC source circuit |
-
2019
- 2019-05-22 CN CN201920738821.3U patent/CN209692341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245522A (en) * | 2018-08-23 | 2019-01-18 | 杭州乾程弘泰电力科技有限公司 | A kind of constant-voltage DC source circuit |
| CN109245522B (en) * | 2018-08-23 | 2023-10-03 | 青岛乾程科技股份有限公司 | Constant voltage direct current power supply circuit |
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