CN108173422B - Ignition-prevention reset circuit of automobile data acquisition box - Google Patents
Ignition-prevention reset circuit of automobile data acquisition box Download PDFInfo
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- CN108173422B CN108173422B CN201810070337.8A CN201810070337A CN108173422B CN 108173422 B CN108173422 B CN 108173422B CN 201810070337 A CN201810070337 A CN 201810070337A CN 108173422 B CN108173422 B CN 108173422B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 139
- 239000003990 capacitor Substances 0.000 claims description 35
- 230000001052 transient effect Effects 0.000 claims description 19
- 230000001629 suppression Effects 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000013480 data collection Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an anti-ignition reset circuit of an automobile data acquisition box, which comprises the following components: the system comprises a power conversion module, an enabling end power supply circuit, a power conversion enabling end locking circuit and a singlechip; the power supply conversion module converts the voltage of an automobile battery power supply to provide a power supply for the automobile data acquisition box; when the automobile is ignited, the power conversion enabling end locking circuit locks the level voltage of the enabling end of the power conversion module; the power conversion module is prevented from resetting and restarting due to low output voltage of the power supply of the automobile storage battery; and the singlechip performs locking control on the locking circuit at the power conversion enabling end. The anti-ignition reset circuit for the automobile data acquisition box provided by the embodiment of the invention realizes the locking of the enabling end of the power conversion module, prevents the reset of a power supply when an automobile is ignited, and avoids the excessive loss of an automobile battery through the power supply circuit of the enabling end.
Description
Technical Field
The invention relates to the technical field of automobile electronics, in particular to an ignition-prevention reset circuit of an automobile data acquisition box.
Background
The automobile collection box mainly uses an automobile storage battery as an input power supply to supply power to each module of the automobile collection box, and converts an automobile level power supply into a system power supply of the automobile collection box through a power supply voltage conversion chip. Because the enabling voltage of the enabling end of the power conversion chip is obtained by dividing the power of the automobile battery. Therefore, when the automobile is ignited, the storage battery is instantly low in level, the enabling voltage of the enabling end of the power conversion chip is pulled down by the low level, so that the power conversion chip is restarted, the restarting of the power conversion chip leads to the restarting of the automobile data acquisition box, and the automobile data acquisition box is abnormally operated.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, one object of the invention is to provide an ignition-prevention reset circuit for an automobile data acquisition box.
In order to achieve the above object, according to an embodiment of the present invention, an ignition prevention reset circuit for an automobile data collection box includes:
the power conversion enabling end locking circuit locks the level voltage of the enabling end of the power conversion module when the automobile is ignited; the power conversion module is prevented from resetting and restarting due to low output voltage of the power supply of the automobile storage battery;
the enabling end power supply circuit divides the power output of the automobile battery, and provides working voltage for the enabling end of the power conversion module, and when the power output of the automobile battery is lower than a set value, the working voltage enables the power conversion module to stop the conversion of the power supply.
The power supply conversion module is used for converting the voltage of the automobile storage battery power supply and providing a power supply for the automobile data acquisition box;
and the singlechip is used for carrying out locking control on the locking circuit at the power conversion enabling end.
According to one embodiment of the invention, the power conversion enabling end locking circuit comprises a first triode Q1, a first resistor R4 and a second resistor R3;
one end of the first resistor R4 is connected with a control end of the singlechip, the other end of the first resistor R4 is connected with a base electrode of the first triode Q1, the base electrode of the first triode Q1 is also connected with one end of the second resistor R3, and the other end of the second resistor R3 is connected with a reference ground; the emitter of the first triode Q1 is connected with a first power supply, and the collector of the first triode Q1 is connected with the enabling end of the power supply conversion module.
According to one embodiment of the invention, the enabling-side power supply circuit comprises a third resistor R1 and a fourth resistor R2;
one end of the third resistor R1 is connected with the power output end of the storage battery, the other end of the third resistor R1 is connected with one end of the fourth resistor R2, the other end of the fourth resistor R2 is connected with the reference ground, and the common end of the third resistor R1 and the fourth resistor R2 is connected with the enabling end of the power conversion module.
According to one embodiment of the present invention, the power conversion enabling end locking circuit further includes a unidirectional conduction diode D11;
the anode of the unidirectional conduction diode D11 is connected with the collector of the first triode Q1, and the cathode of the unidirectional conduction diode D11 is connected with the enabling end of the power conversion module;
the unidirectional conduction diode D11 enables unidirectional conduction between the power conversion enabling end locking circuit and the enabling end of the power conversion module;
according to one embodiment of the present invention, the power conversion enabling end locking circuit further includes an anti-jitter filter capacitor C45;
one end of the anti-shake filter capacitor C45 is connected with the power supply conversion enabling end, and the other end of the anti-shake filter capacitor C45 is connected with the reference ground;
according to one embodiment of the present invention, the power conversion enabling end locking circuit further includes a signal holding capacitor C37;
one end of the signal holding capacitor C37 is connected to the one end of the first resistor R4, and the other end of the signal holding capacitor C37 is connected to the ground.
According to one embodiment of the invention, the system further comprises a transient absorption circuit;
the transient absorption circuit comprises a first diode D1, a transient suppression diode DV1 and a first capacitor C1;
the anode of the first diode D1 is connected with the power output end of the automobile storage battery, the cathode of the first diode D1 is respectively connected with one end of the transient suppression diode DV1, one end of the first capacitor C1 and the power input end of the power conversion module, the other end of the transient suppression diode DV1 is connected with a reference, and the other end of the first capacitor C1 is connected with a reference ground;
according to one embodiment of the present invention, the power conversion module includes a DC-DC conversion control circuit, a step-down circuit, and a filter circuit; the DC-DC conversion control circuit is connected with the voltage reduction circuit, and the voltage reduction circuit is connected with the filter circuit.
According to one embodiment of the present invention, the DC-DC conversion control circuit includes a power conversion controller U1;
the step-down circuit comprises a second diode D2, an inductor L1, a fifth resistor R5 and a sixth resistor R6; the cathode of the second diode D2 is connected with the conversion output end of the power conversion controller U1, the anode of the second diode D2 is connected with the reference ground, one end of the inductor L1 is connected with the conversion output end of the power conversion controller U1, the other end of the inductor L1 is connected with one end of a fifth resistor R5, the other end of the fifth resistor R5 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the reference ground;
the filter circuit comprises a filter capacitor C2, and one end of the filter capacitor C2 is connected with one end of the fifth resistor R5.
According to the ignition-prevention reset circuit for the automobile data acquisition box, provided by the embodiment of the invention, the power conversion module is locked by the power conversion enabling end locking circuit when an automobile is ignited, so that the electronic equipment is restarted or shut down due to the reset of the power conversion module caused by the low level when the automobile is ignited, the normal operation of the electronic equipment such as the automobile acquisition box is ensured, the conversion of the power conversion module is stopped when the voltage of the automobile storage battery is too low through the enabling end power supply circuit, the electric energy of the automobile storage battery is further consumed when the output voltage of the automobile storage battery is too low, and the excessive loss of the automobile storage battery is avoided. The service life of the automobile battery is ensured.
Drawings
Fig. 1 is a schematic diagram of an anti-ignition reset circuit of an automobile data acquisition box according to an embodiment of the invention;
fig. 2 is a schematic diagram of a power conversion enabling end locking circuit, a transient absorption circuit and a power conversion module circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a single chip microcomputer module structure according to an embodiment of the present invention.
Reference numerals:
a singlechip 10;
a power conversion enable end latch circuit 20;
a power conversion module 30;
a DC-DC conversion control circuit 301;
a step-down circuit 302;
a filter circuit 303;
a transient absorption circuit 40.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present invention with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of an anti-ignition reset circuit of an automobile data acquisition box according to an embodiment of the invention.
The automobile data acquisition box ignition prevention reset circuit comprises: the power conversion enabling end locking circuit 20, the enabling end power supply circuit 50, the power conversion module 30 and the singlechip 10; the power conversion enabling end locking circuit 20 locks the level voltage of the enabling end of the power conversion module 30 when the automobile is ignited; preventing the power conversion module 30 from resetting and restarting due to low output voltage of the battery power supply of the automobile; the enabling end power supply circuit divides the power output of the automobile storage battery and provides working voltage for the enabling end of the power conversion module, and when the power output of the automobile storage battery is lower than a set value, the working voltage enables the power conversion module to stop power conversion. The power supply conversion module 30 converts the voltage of the automobile battery power supply to provide a power supply for the automobile data acquisition box; the singlechip 10 performs locking control on the locking circuit 20 at the power conversion enabling end.
Specifically, when the automobile is ignited, the voltage value output by the battery of the automobile may fluctuate, and the fluctuating voltage value may cause the output voltage to have a high level or a low level, so that the power input end and the power enabling end of the power conversion module 30 may cause the fluctuating voltage to cause the restarting of the power conversion module 30. In addition, the loss of the automobile battery in using electric energy may cause the loss of the battery. The output voltage of the battery is reduced due to the loss of the battery of the automobile, and the embodiment of the invention locks the level voltage of the enabling end of the power conversion module 30 when the automobile is ignited by the power conversion enabling end locking circuit 20. For example, a constant high level is output. Avoiding a fluctuating voltage at the enable of the power conversion module 30. Thereby avoiding a restart of the power conversion module 30. In addition, the enabling end power supply circuit divides the power output of the automobile battery and provides working voltage for the enabling end of the power conversion module 30, and when the power output of the automobile battery is lower than a set value, the working voltage enables the power conversion module 30 to stop the conversion of the power. That is, when the output voltage of the battery power supply of the automobile is low, the battery power supply of the automobile is about to be consumed. At this time, the automobile data collection box is powered off and stops working, so as to avoid further consuming the automobile battery power supply and reduce the service life of the automobile battery. At this time, the power conversion module 30 stops the voltage conversion. Thereby avoiding further consumption of the electric energy of the automobile battery.
According to the ignition-prevention reset circuit for the automobile data acquisition box, provided by the embodiment of the invention, the power conversion module 30 locks the enabling end of an automobile when the automobile is ignited through the power conversion enabling end locking circuit, so that the restarting or shutdown of electronic equipment caused by the reset of the power conversion module 30 due to the low level caused by the ignition of the automobile is avoided, the normal operation of the electronic equipment such as the automobile acquisition box is ensured, the conversion of the power conversion module 30 is stopped when the voltage of an automobile battery is too low through the enabling end power supply circuit, the electric energy of the automobile battery is further consumed when the output voltage of the automobile battery is prevented from being too low, and the excessive loss of the automobile battery is avoided. The service life of the automobile battery is ensured.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a power conversion enabling end locking circuit 20, a transient absorption circuit 40 and a power conversion module 30 according to an embodiment of the invention.
Further, in one embodiment of the present invention, the power conversion enabling end locking circuit 20 includes a first triode Q1, a first resistor R4 and a second resistor R3; one end of the first resistor R4 is connected with a control end of the singlechip 10, the other end of the first resistor R4 is connected with a base electrode of the first triode Q1, the base electrode of the first triode Q1 is also connected with one end of the second resistor R3, and the other end of the second resistor R3 is connected with a reference ground; an emitter of the first triode Q1 is connected with a first power supply, and a collector of the first triode Q1 is connected with the enabling end of the power supply conversion module 30; the first triode Q1 is a PNP transistor.
Specifically, the control terminal of the singlechip 10 outputs a control level, and when the control level is low, the collector and the emitter of the first triode Q1 are mutually conducted, so that the enabling terminal/SHDN of the power conversion module 30 is constant high level, thereby preventing the control terminal/SHDN of the power conversion module 30 from restarting the power conversion module 30 due to low power supply level when the automobile is ignited.
In the embodiment of the invention, the first triode Q1, the first resistor R4 and the second resistor R3 form a power supply control switch, so that the control end/SHDN of the power supply conversion module 30 is locked, the power supply conversion module 30 is prevented from restarting due to low power supply level when the automobile is ignited, and the circuit is simple and stable.
Further, in one embodiment of the present invention, the power conversion enabling end locking circuit 20 further includes: the enabling end power supply circuit comprises a third resistor R1 and a fourth resistor R2; one end of the third resistor R1 is connected with the power output end of the storage battery, the other end of the third resistor R1 is connected with one end of the fourth resistor R2, the other end of the fourth resistor R2 is connected with the reference ground, and the common end of the third resistor R1 and the fourth resistor R2 is connected with the enabling end of the power conversion module.
Specifically, the enabling-end power supply circuit provides an enabling level for the enabling end of the power conversion module 30, so that the power conversion module works normally and performs the power voltage conversion.
Further, in one embodiment of the present invention, the power conversion enabling end locking circuit 20 further includes a unidirectional conduction diode D11; the anode of the unidirectional conduction diode D11 is connected with the collector of the first triode Q1, and the cathode of the unidirectional conduction diode D11 is connected with the enabling end of the power conversion module 30; the unidirectional conduction diode D11 makes unidirectional conduction between the power conversion enable end locking circuit 20 and the enable end of the power conversion module. Thus, the interference of the automobile power supply to the automobile data acquisition box power supply is prevented.
Further, in an embodiment of the present invention, the power conversion enabling end locking circuit further includes an anti-jitter filter capacitor C45; one end of the anti-shake filter capacitor C45 is connected with the power supply conversion enabling end, and the other end of the anti-shake filter capacitor C45 is connected with the reference ground; the anti-jitter filter capacitor C45 prevents the vehicle power from jittering, which results in the power conversion module 30 being restarted and reset.
Further, in one embodiment of the present invention, the power conversion enable end lock-up circuit further includes a signal holding capacitor C37; one end of the signal holding capacitor C37 is connected to the one end of the first resistor R4, and the other end of the signal holding capacitor C37 is connected to the ground.
Further, in one embodiment of the present invention, a transient absorption circuit 40 is further included; the transient absorption circuit comprises a first diode D1, a transient suppression diode DV1 and a first capacitor C1; the anode of the first diode D1 is connected with the power output end of the automobile battery, the cathode of the first diode D1 is respectively connected with one end of the transient suppression diode DV1, one end of the first capacitor C1 and the power input end of the power conversion module 30, the other end of the transient suppression diode DV1 is connected with a reference, and the other end of the first capacitor C1 is connected with a reference ground.
Specifically, the first diode D1, the transient suppression diode DV1 and the first capacitor C1 form a transient absorption circuit, so as to prevent the output voltage from generating a spike or suppressing a high voltage.
Further, in one embodiment of the present invention, according to one embodiment of the present invention, the power conversion module includes a DC-DC conversion control circuit 301, a step-down circuit 302, and a filter circuit 303; the DC-DC conversion control circuit 301 is connected to the step-down circuit 302, and the step-down circuit 302 is connected to the filter circuit 303.
With continued reference to fig. 2, in one embodiment of the invention, the DC-DC conversion control circuit 301 includes a power conversion controller U1; the step-down circuit 302 includes a second diode D2, an inductor L1, a fifth resistor R5, and a sixth resistor R6; the cathode of the second diode D2 is connected with the conversion output end of the power conversion controller U1, the anode of the second diode D2 is connected with the reference ground, one end of the inductor L1 is connected with the conversion output end of the power conversion controller U1, the other end of the inductor L1 is connected with one end of a fifth resistor R5, the other end of the fifth resistor R5 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the reference ground; the filter circuit 303 includes a filter capacitor C2, and one end of the filter capacitor C2 is connected to the one end of the fifth resistor R5.
The second diode D2, the inductor L1 and the filter capacitor C2 form a power supply voltage reducing and filtering circuit; the fifth resistor R5 and the sixth resistor R6 are connected in series to form a voltage dividing circuit, and the divided output voltage of the power supply conversion controller U1 is fed back to the voltage feedback end of the power supply conversion controller U1.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the present invention may be modified or equivalents substituted for some of the features thereof. All equivalent structures made by the content of the specification and the drawings of the invention are directly or indirectly applied to other related technical fields, and are also within the scope of the invention.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (7)
1. The utility model provides a car data acquisition box prevents that reset circuit that fires, its characterized in that, car data acquisition box prevents that reset circuit that fires includes:
the power supply conversion module is used for converting the voltage of the automobile storage battery power supply and providing a power supply for the automobile data acquisition box;
the power conversion enabling end locking circuit locks the level voltage of the enabling end of the power conversion module when the automobile is ignited; the power conversion module is prevented from resetting and restarting due to low output voltage of the power supply of the automobile storage battery;
the enabling end power supply circuit divides the power output of the automobile storage battery and provides working voltage for the enabling end of the power conversion module, and when the power output of the automobile storage battery is lower than a set value, the working voltage enables the power conversion module to stop the conversion of the power supply;
the singlechip is used for carrying out locking control on the locking circuit at the power supply conversion enabling end;
a transient absorption circuit comprising a first diode (D1), a transient suppression diode (DV 1) and a first capacitance (C1); the anode of the first diode (D1) is connected with the power output end of the automobile storage battery, the cathode of the first diode (D1) is respectively connected with one end of the transient suppression diode (DV 1), one end of the first capacitor (C1) and the power input end of the power conversion module, the other end of the transient suppression diode (DV 1) is connected with a reference, and the other end of the first capacitor (C1) is connected with a reference ground;
the power supply conversion enabling end locking circuit comprises a first triode (Q1), a first resistor (R4) and a second resistor (R3); one end of the first resistor (R4) is connected with a control end of the singlechip, the other end of the first resistor (R4) is connected with a base electrode of the first triode (Q1), the base electrode of the first triode (Q1) is also connected with one end of the second resistor (R3), and the other end of the second resistor (R3) is connected with a reference ground; the emitter of the first triode (Q1) is connected with a first power supply, and the collector of the first triode (Q1) is connected with the enabling end of the power supply conversion module.
2. The automobile data collection box ignition-prevention reset circuit according to claim 1, wherein the enabling-side power supply circuit comprises a third resistor (R1) and a fourth resistor (R2);
one end of the third resistor (R1) is connected with the power output end of the storage battery, the other end of the third resistor (R1) is connected with one end of the fourth resistor (R2), the other end of the fourth resistor (R2) is connected with the reference ground, and the common end of the third resistor (R1) and the common end of the fourth resistor (R2) are connected with the enabling end of the power conversion module.
3. The automobile data acquisition box ignition-prevention reset circuit according to claim 2, wherein the power conversion enabling end locking circuit further comprises a unidirectional conduction diode (D11);
the anode of the unidirectional conduction diode (D11) is connected with the collector electrode of the first triode (Q1), and the cathode of the unidirectional conduction diode (D11) is connected with the enabling end of the power conversion module;
the unidirectional conduction diode (D11) enables unidirectional conduction between the power conversion enabling end locking circuit and the enabling end of the power conversion module.
4. The automobile data collection box anti-ignition reset circuit according to claim 1, wherein the power conversion enabling end locking circuit further comprises an anti-shake filter capacitor (C45);
one end of the anti-shake filter capacitor (C45) is connected with the power supply conversion enabling end, and the other end of the anti-shake filter capacitor (C45) is connected with the reference ground.
5. The automotive data collection box anti-ignition reset circuit of claim 1, wherein the power conversion enabling end lock-up circuit further comprises a signal holding capacitor (C37);
one end of the signal holding capacitor (C37) is connected with the one end of the first resistor (R4), and the other end of the signal holding capacitor (C37) is connected with the reference ground.
6. The automobile data collection box ignition-prevention reset circuit according to claim 1, wherein the power supply conversion module comprises a DC-DC conversion control circuit, a voltage reduction circuit and a filter circuit; the DC-DC conversion control circuit is connected with the voltage reduction circuit, and the voltage reduction circuit is connected with the filter circuit.
7. The automotive data collection box ignition-prevention reset circuit of claim 6, wherein the DC-DC conversion control circuit comprises a power conversion controller (U1); the step-down circuit comprises a second diode (D2), an inductor (L1), a fifth resistor (R5) and a sixth resistor (R6); the cathode of the second diode (D2) is connected with the conversion output end of the power supply conversion controller (U1), the anode of the second diode (D2) is connected with the reference ground, one end of the inductor (L1) is connected with the conversion output end of the power supply conversion controller (U1), the other end of the inductor (L1) is connected with one end of a fifth resistor (R5), the other end of the fifth resistor (R5) is connected with one end of a sixth resistor (R6), and the other end of the sixth resistor (R6) is connected with the reference ground;
the filter circuit comprises a filter capacitor (C2), and one end of the filter capacitor (C2) is connected with one end of the fifth resistor (R5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070337.8A CN108173422B (en) | 2018-01-24 | 2018-01-24 | Ignition-prevention reset circuit of automobile data acquisition box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070337.8A CN108173422B (en) | 2018-01-24 | 2018-01-24 | Ignition-prevention reset circuit of automobile data acquisition box |
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| CN108173422A CN108173422A (en) | 2018-06-15 |
| CN108173422B true CN108173422B (en) | 2024-04-12 |
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| CN201810070337.8A Active CN108173422B (en) | 2018-01-24 | 2018-01-24 | Ignition-prevention reset circuit of automobile data acquisition box |
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| CN109188242B (en) * | 2018-08-29 | 2021-08-31 | 郑州云海信息技术有限公司 | Time sequence testing method and device and VR chip |
| CN109358548A (en) * | 2018-10-31 | 2019-02-19 | 深圳市元征科技股份有限公司 | A kind of charging method of automotive diagnostic system, vehicle diagnosis and automotive diagnostic unit |
| CN110690880B (en) * | 2019-10-25 | 2021-11-26 | 东风电子科技股份有限公司 | Vehicle-mounted instrument circuit structure capable of realizing immediate starting after micro power-off of whole vehicle in extremely-low dark current sleep environment |
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