CN109672434A - A kind of automobile electronic controller supply voltage delay unlatching protection circuit - Google Patents
A kind of automobile electronic controller supply voltage delay unlatching protection circuit Download PDFInfo
- Publication number
- CN109672434A CN109672434A CN201811581968.2A CN201811581968A CN109672434A CN 109672434 A CN109672434 A CN 109672434A CN 201811581968 A CN201811581968 A CN 201811581968A CN 109672434 A CN109672434 A CN 109672434A
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- resistance
- capacitor
- delay
- triode
- electronic controller
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- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 239000004065 semiconductor Substances 0.000 claims description 30
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 4
- 238000010892 electric spark Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
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Abstract
The present invention discloses a kind of automobile electronic controller supply voltage delay unlatching protection circuit, including sequentially connected RC charging delay circuit, switching circuit, triode switch delay circuit and DC/DC voltage module；RC charging delay circuit includes first resistor and first capacitor, and first resistor first end is connect with first capacitor first end, and first resistor second end is connect with input voltage source；First capacitor second end ground connection；Triode switch delay circuit includes the 4th resistance, the 5th resistance, the 6th resistance, the second capacitor and triode；4th resistance first end be connected respectively with the 5th resistance first end, the second capacitor first end and triode base stage；5th resistance second end, the second capacitor second end and transistor emitter are grounded, and the 6th resistance first end is connected with transistor collector.Protection circuit is opened in delay of the invention can obtain larger electric power starting delay time, and will not generate ripple to DC/DC module influences.
Description
Technical field
The present invention relates to automobile electronic controller fields, postpone more particularly to a kind of automobile electronic controller supply voltage
Open protection circuit.
Background technique
Auto Electronic Controlled System is the important component of electric car, by a large amount of sensor, electronic controller, drive
The part such as dynamic device and control program software forms, wherein sensor and automobile electronic controller, it will be from electric car power supply mother
Power supply (generally 12/24V) is obtained in line, then is converted by DC/DC, the power supply that sensor and electronic controller need is obtained
(generally 5V).
And power outlet and vapour when automobile electronic controller is plugged in the energized state, due to electronic controller
Vehicle power outlet carries out Mechanical Contact, can generate electric spark in the junction of metal terminal；And electronic controller socket is through too long
The work of time is also easy to produce electric spark since vehicle body vibration loosens.The energy size of electric spark and supply voltage with
And the capacitance on power supply has close relationship, and service life to metal terminal and vehicle body generate safely certain shadow
It rings.It is therefore desirable to a kind of protection circuit that supply voltage delay is opened, so that electronic controller is on being inserted into automobile power outlet
Later the delay regular hour, restart DC/DC module.
It is only realized by a RC retardation ratio circuit in DC/DC power module delay circuit used at present, if it is desired to obtaining
Biggish power supply delay time, and so can be in DC/DC module it is necessary to improve the capacitance or resistance value in RC retardation ratio circuit
Power input+Vin generate 60-120Hz ripple.Meanwhile this ripple will lead to the ON/OFF end signal of DC/DC module
It is unstable, thus the uncertainty for causing DC/DC module to control.
And if the capacitor in RC retardation ratio circuit breaks down, DC/DC module can be made to be constantly in opening state
State can not realize the function that the delay of DC/DC power module is opened.
Summary of the invention
The object of the present invention is to provide one kind can reliably obtain larger electric power starting delay time, while will not be right
Protection circuit is opened in the automobile electronic controller supply voltage delay that the ON/OFF of DC/DC module generates ripple and influences.
To achieve the above object, the present invention provides following schemes:
A kind of automobile electronic controller supply voltage delay unlatching protection circuit, including sequentially connected RC charging delay electricity
Road, switching circuit, triode switch delay circuit and DC/DC voltage module；
The RC charging delay circuit includes first resistor and first capacitor, the first end of the first resistor and described the
The first end of one capacitor connects, and the second end of the first resistor is connect with input voltage source；The second end of the first capacitor
Ground connection；
The triode switch delay circuit includes the 4th resistance, the 5th resistance, the 6th resistance, the second capacitor and three poles
Pipe；
Wherein, the first end of the 4th resistance with respectively with the first end of the 5th resistance, second capacitor
First end and the base stage of the triode are connected；The second end of 5th resistance, the second end of second capacitor and described
The emitter of triode is grounded；The first end of 6th resistance and collector, the DC/DC voltage-mode of the triode
The ON/OFF pin of block is connected；The second end of 6th resistance, the DC/DC voltage module voltage input pin and institute
Input voltage source is stated to be connected.
Preferably, the switching circuit is metal-oxide-semiconductor switching circuit.
The metal-oxide-semiconductor switching circuit includes second resistance, 3rd resistor, TVS pipe and metal-oxide-semiconductor；
Wherein, the first end of the second resistance first end with the first end of the TVS pipe, the 3rd resistor respectively
And the grid of the metal-oxide-semiconductor is connected；
The second end of the second resistance, the second end of the TVS pipe, the source electrode of the metal-oxide-semiconductor are electric with described first
The first end of resistance is connected；
The drain electrode of the metal-oxide-semiconductor is connected with the second end of the 4th resistance；
The second end of the 3rd resistor is grounded.
Preferably, the metal-oxide-semiconductor is P-channel power tube.
Preferably, the triode is NPN type triode.
Preferably, the first capacitor, second capacitor are Leaded Ceramic Disc Capacitor
The total delay time that protection circuit is opened in the automobile electronic controller supply voltage delay is T1+T2, wherein T1
For the delay time of the RC charging delay circuit, T2 is the delay time of the triode switch delay circuit.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
Automobile electronic controller supply voltage delay in the present invention opens protection circuit and passes through setting RC charging delay electricity
Road, metal-oxide-semiconductor switching circuit and triode delay circuit first carry out delay time T1 by RC charging delay circuit；Again by three poles
Pipe delay circuit carries out delay time T2, and the delay protection time of entire circuit is T1+T2, obtains biggish electric power starting delay
Time.
Meanwhile if the capacitor of RC charging delay circuit breaks down, DC/DC is controlled by triode switch delay circuit
The end ON/OFF of module, circuit still have the backup delay opening time of T2, promote circuit reliability.
Also, triode is the time by that can will control in microsecond rank, and will not generate ripple shadow by the end of on state
It rings.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that protection circuit diagram is opened in automobile electronic controller supply voltage delay of the invention
Detailed description of the invention: 1-RC charging delay circuit；2- switching circuit；3- triode switch delay circuit；4-DC/DC mould
Block, R1- first resistor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The 5th resistance of R5-；The 6th resistance of R6-；
C1- first capacitor；The second capacitor of C2-；Power- input voltage source；TVS1-TVS pipe；Q1-MOS pipe pipe；Q2- triode；V1-
The first end voltage of first capacitor；V2-MOS pipe drain voltage；V3- transistor base voltage；GND- ground connection.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide one kind can reliably obtain larger electric power starting delay time, while will not be right
Protection circuit is opened in the automobile electronic controller supply voltage delay that the ON/OFF of DC/DC module generates ripple and influences.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
A kind of automobile electronic controller supply voltage delay unlatching protection circuit, including sequentially connected RC charging delay electricity
Road 1, switching circuit 2, triode switch delay circuit 3 and DC/DC voltage module 4；
The RC charging delay circuit 1 includes first resistor R1 and first capacitor C1, the first end of the first resistor R1
It is connect with the first end of the first capacitor C1, the second end of the first resistor R1 is connect with input voltage source Power；It is described
The second end of first capacitor C1 is grounded；
The triode switch delay circuit 3 includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the second capacitor
C2 and triode Q2；
Wherein, the first end of the 4th resistance R4 with respectively with the first end of the 5th resistance R5, it is described second electricity
The base stage of the first end and the triode Q2 of holding C2 is connected；The second end of the 5th resistance R5, the second capacitor C2
The emitter of second end and the triode Q2 are grounded；The first end of the 6th resistance R6 and the current collection of the triode Q2
Pole, the ON/OFF pin of the DC/DC voltage module 4 are connected；Second end, the DC/DC voltage-mode of the 6th resistance R6
The voltage input pin of block 4 is connected with the input voltage source Power.
The switching circuit 2 is metal-oxide-semiconductor switching circuit.
The metal-oxide-semiconductor switching circuit includes second resistance R2,3rd resistor R3, TVS pipe TVS1 and metal-oxide-semiconductor Q1；
Wherein, the first end of the second resistance R2 respectively with the first end of the TVS pipe TVS1, the 3rd resistor R3
First end and the metal-oxide-semiconductor Q1 grid be connected；
The second end of the second resistance R2, the second end of the TVS pipe TVS1, the metal-oxide-semiconductor Q1 source electrode and institute
The first end for stating first resistor R1 is connected；
The drain electrode of the metal-oxide-semiconductor Q1 is connected with the second end of the 4th resistance R4；
The second end of the 3rd resistor R3 is grounded.
Preferably, the metal-oxide-semiconductor Q1 is P-channel power tube.
Preferably, the triode Q2 is NPN type triode.
First capacitor C1, the second capacitor C2 are Leaded Ceramic Disc Capacitor.
Protection circuit diagram is opened in automobile electronic controller supply voltage of the invention delay as shown in Figure 1, works as input voltage
When source Power is acted on circuit: power supply Power is charged by first resistor resistance R1 to first capacitor capacitor C1, the
The first end voltage V1 of one capacitor C1 is persistently increased, and then is divided by second resistance R2 and 3rd resistor R3.
The grid source control voltage of metal-oxide-semiconductor Q1 is Vgs=V1*R2/ (R2+R3), and wherein R2 is the resistance value of second resistance, and R3 is
The resistance value of 3rd resistor；Charge constant is R1*C1, and wherein R1 is the resistance value of first resistor, and C1 is the capacitor of first capacitor
Value.
The conducting voltage of metal-oxide-semiconductor Q1 is Vth, this value is generally a fixed range, and Vmin < Vth < Vmax works as metal-oxide-semiconductor
When the grid source control voltage Vgs of Q1 is greater than minimum value Vmin, metal-oxide-semiconductor Q1 can be connected, at this time the drain voltage V2 etc. of metal-oxide-semiconductor Q1
In V1.RC charging delay circuit 1 completes delay, is denoted as T1.
After metal-oxide-semiconductor Q1 conducting, voltage V2 is charged by the 4th resistance R4 to the second capacitor C2.As the 5th resistance R5
When the voltage V3 of first end is equal to 0.7V, triode Q2 conducting, the Vce=0V of triode Q2, DC/DC module 4 are opened at this time.Three
Pole pipe delay circuit 3 completes delay, is denoted as T2.
Then the charging time of entire circuit is T1+T2.
Wherein, TVS pipe TVS1 protects the gate source voltage of metal-oxide-semiconductor Q1 within the working range of safety.
5th resistance R5 is triode Q2 base stage to ground resistance, guarantees that triode Q2 reliably ends.
6th resistance R6 is the collector resistance of triode Q2.
When first capacitor C1 breaks down such as open circuit, supply voltage passes through first resistor R1, second resistance R2
With 3rd resistor R3 equally metal-oxide-semiconductor Q1 can be connected, the delay of T2 time is carried out using triode switch delay circuit 3,
DC/DC module 4 is set to open work.That is T2 is the backup delay time after first capacitor C1 breaks down, it is ensured that circuit safety can
The work leaned on.Also, the end ON/OFF that DC/DC module 4 is controlled by triode switch delay circuit 3, by by the end of on state,
Time can control in microsecond rank, meanwhile, whole work process is all switching circuit, and the generation of ripple, does not avoid DC/DC
Module 4 is influenced by ripple.
Automobile electronic controller supply voltage delay of the invention, which is opened, protects circuit structure simple, low cost, reliability
Height can obtain biggish power-on time, while will not generate ripple to the ON/OFF of DC/DC module 4 to influence；
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. protection circuit is opened in a kind of automobile electronic controller supply voltage delay, which is characterized in that including sequentially connected RC
Charging delay circuit, switching circuit, triode switch delay circuit and DC/DC voltage module；
The RC charging delay circuit includes first resistor and first capacitor, and the first end of the first resistor is electric with described first
The first end of appearance connects, and the second end of the first resistor is connect with input voltage source；The second end of the first capacitor is grounded；
The triode switch delay circuit includes the 4th resistance, the 5th resistance, the 6th resistance, the second capacitor and triode；
Wherein, the first end of the 4th resistance with respectively with the first end of the 5th resistance, second capacitor first
The base stage of end and the triode is connected；The second end of 5th resistance, the second end of second capacitor and three pole
The emitter of pipe is grounded；The collector of the first end of 6th resistance and the triode, the DC/DC voltage module
ON/OFF pin is connected；The second end of 6th resistance, the DC/DC voltage module voltage input pin with it is described defeated
Enter voltage source to be connected.
2. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 1, feature exists
In the switching circuit is metal-oxide-semiconductor switching circuit.
3. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 2, feature exists
In,
The metal-oxide-semiconductor switching circuit includes second resistance, 3rd resistor, TVS pipe and metal-oxide-semiconductor；
Wherein, the first end of the second resistance respectively with the first end of the TVS pipe, the first end of the 3rd resistor and
The grid of the metal-oxide-semiconductor is connected；
The second end of the second resistance, the second end of the TVS pipe, the metal-oxide-semiconductor source electrode with the first resistor
First end is connected；
The drain electrode of the metal-oxide-semiconductor is connected with the second end of the 4th resistance；
The second end of the 3rd resistor is grounded.
4. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 3, feature exists
In the metal-oxide-semiconductor is P-channel power tube.
5. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 1, feature exists
In the triode is NPN type triode.
6. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 1, feature exists
In the first capacitor, second capacitor are Leaded Ceramic Disc Capacitor.
7. protection circuit is opened in a kind of automobile electronic controller supply voltage delay according to claim 1, feature exists
In,
The total delay time that protection circuit is opened in the automobile electronic controller supply voltage delay is T1+T2, wherein T1 is institute
The delay time of RC charging delay circuit is stated, T2 is the delay time of the triode switch delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581968.2A CN109672434A (en) | 2018-12-24 | 2018-12-24 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581968.2A CN109672434A (en) | 2018-12-24 | 2018-12-24 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109672434A true CN109672434A (en) | 2019-04-23 |
Family
ID=66147131
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|---|---|---|---|
| CN201811581968.2A Pending CN109672434A (en) | 2018-12-24 | 2018-12-24 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098463A (en) * | 2020-01-09 | 2021-07-09 | 长鑫存储技术有限公司 | Power gating circuit and storage chip |
| CN113346737A (en) * | 2021-04-29 | 2021-09-03 | 山东英信计算机技术有限公司 | Adjustable delay circuit, delay circuit system and method |
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| CN209057188U (en) * | 2018-12-24 | 2019-07-02 | 优数通（北京）科技有限公司 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
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| CN102098032A (en) * | 2011-02-23 | 2011-06-15 | 海能达通信股份有限公司 | Delay switching circuit for inhibiting electrifying pulse current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113098463A (en) * | 2020-01-09 | 2021-07-09 | 长鑫存储技术有限公司 | Power gating circuit and storage chip |
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| CN113346737B (en) * | 2021-04-29 | 2022-09-20 | 山东英信计算机技术有限公司 | Adjustable delay circuit, delay circuit system and method |
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Application publication date: 20190423 |
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