CN216526800U - Navigation start control circuit and navigator - Google Patents
Navigation start control circuit and navigator Download PDFInfo
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- CN216526800U CN216526800U CN202122641457.9U CN202122641457U CN216526800U CN 216526800 U CN216526800 U CN 216526800U CN 202122641457 U CN202122641457 U CN 202122641457U CN 216526800 U CN216526800 U CN 216526800U
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Abstract
The application provides a navigation start control circuit and a navigator. The navigation starting control circuit comprises an ignition sampling circuit and a navigation starting circuit; the ignition sampling circuit comprises a first electronic switching tube, a second electronic switching tube, a first resistor, a second resistor and a third resistor, wherein the first end of the first electronic switching tube is connected with the control end of the second electronic switching tube, the first end of the second electronic switching tube is used for sampling an ignition starting signal, and the second end of the second electronic switching tube is grounded; the first end of the second electronic switch tube is connected with the enabling end of the navigation starting circuit. After ignition is started, the first electronic switch tube and the second electronic switch are both in an amplifying state, so that the enabling end of the navigation starting circuit is in a high level, the navigation starting circuit is convenient to start, the navigator is convenient to start while ignition is performed, the operation of independently starting the navigator is omitted, the starting steps of the navigator are simplified, and automatic starting of the navigator is realized.
Description
Technical Field
The utility model relates to the technical field of navigators, in particular to a navigation starting control circuit and a navigator.
Background
Along with the rapid development of intelligent automobiles, more and more intelligent devices are applied to the automobiles, so that various automobile-mounted devices are formed, the operation of drivers in driving is facilitated, and the use comfort degree of the drivers to the automobiles is greatly improved. For example, in some automatic transmission vehicles, after ignition is started, the power driving device in the vehicle is correspondingly started to drive the vehicle to run.
However, some vehicle-mounted devices, such as a vehicle-mounted navigator, require manual activation by a driver, so that the navigator is inconvenient to use, and particularly during driving, the behavior is a dangerous behavior, a traffic accident is easy to happen, and the safety in use is seriously reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a navigation starting control circuit convenient for automatic starting and a navigator.
The purpose of the utility model is realized by the following technical scheme:
a navigation initiation control circuit comprising: the ignition sampling circuit and the navigation starting circuit; the ignition sampling circuit comprises a first electronic switching tube, a second electronic switching tube, a first resistor, a second resistor and a third resistor, wherein the second end of the first electronic switching tube is used for being connected with an external power supply, the second end of the first electronic switching tube is also connected with the control end of the first electronic switching tube through the first resistor, the control end of the first electronic switching tube is grounded through the second resistor, the first end of the first electronic switching tube is connected with the control end of the second electronic switching tube, the first end of the third resistor is used for being connected with a first reference power supply, the second end of the third resistor is connected with the first end of the second electronic switching tube, the first end of the second electronic switching tube is used for sampling an ignition starting signal, and the second end of the second electronic switching tube is grounded; the first end of the second electronic switch tube is connected with the enabling end of the navigation starting circuit, the input power supply end of the navigation starting circuit is used for being connected with a second reference power supply, and the output end of the navigation starting circuit is connected with the starting end of a navigator to enable the navigator to be started.
In one embodiment, the ignition sampling circuit further comprises a first diode, a first end of the first electronic switch tube is connected with a first end of the first diode, and a second end of the first diode is connected with an enabling end of the navigation starting circuit.
In one embodiment, the ignition sampling circuit further includes a first capacitor, the first terminal of the first electronic switch tube is connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is grounded.
In one embodiment, the ignition sampling circuit further comprises a fourth resistor, the first end of the first capacitor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is grounded.
In one embodiment, the ignition sampling circuit further comprises a fifth resistor, the first end of the first electronic switch tube is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with the enable end of the navigation start circuit.
In one embodiment, the navigation start circuit includes a voltage reduction circuit and a second capacitor, a first end of the first electronic switch tube is connected to an enable end of the voltage reduction circuit, an output end of the voltage reduction circuit is connected to a first end of the second capacitor, and a second end of the second capacitor is grounded.
In one embodiment, the voltage reduction circuit comprises a direct current voltage reducer, a second diode, a third capacitor, a sixth resistor, a seventh resistor and an output inductor, the input end of the direct current voltage reducer is connected with the second reference power supply, the enable end of the direct current voltage reducer is connected with the first end of the second electronic switching tube, the bootstrap end of the direct current voltage reducer is connected with the output end of the direct current voltage reducer through the third capacitor, the output end of the direct current voltage reducer is also connected with the second end of the second diode, the first end of the second diode is grounded, the output end of the direct current voltage reducer is also connected with the first end of the sixth resistor through the output inductor, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is grounded, and the feedback end of the direct current voltage reducer is connected with the first end of the seventh resistor.
In one embodiment, the dc voltage dropping circuit further includes a fourth capacitor, an input terminal of the dc voltage dropper is connected to a first terminal of the fourth capacitor, and a second terminal of the fourth capacitor is grounded.
In one embodiment, a resistance ratio of the sixth resistor to the seventh resistor is 1.24 to 5.23.
A navigator comprises the navigation starting control circuit in any one of the above embodiments.
Compared with the prior art, the utility model has at least the following advantages:
after the ignition is started, the first electronic switch tube and the second electronic switch are both in an amplification state, namely, the first electronic switch tube and the second electronic switch are both switched on, so that the voltage on the first end of the second electronic switch tube rises, so that the enabling end of the navigation starting circuit is at a high level, so that the navigation starting circuit is started, so that electric energy is output to the starting end of the navigator, and further the navigator is started while the ignition is performed, the operation of independently starting the navigator is omitted, the starting step of the navigator is simplified, and the automatic starting of the navigator is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a circuit diagram of a navigation enable control circuit in one embodiment;
FIG. 2 is a circuit diagram of an ignition sampling circuit of the navigation enable control circuit of FIG. 1;
FIG. 3 is a circuit diagram of a navigation enable circuit of the navigation enable control circuit of FIG. 1;
fig. 4 is a schematic diagram of a monitoring single chip microcomputer connected with the navigation start control circuit shown in fig. 1.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a navigation starting control circuit. In one embodiment, the navigation enable control circuit includes an ignition sampling circuit and a navigation enable circuit. The ignition sampling circuit comprises a first electronic switching tube, a second electronic switching tube, a first resistor, a second resistor and a third resistor. The second end of the first electronic switch tube is used for being connected with an external power supply, the second end of the first electronic switch tube is connected with the control end of the first electronic switch tube through the first resistor, the control end of the first electronic switch tube is grounded through the second resistor, and the first end of the first electronic switch tube is connected with the control end of the second electronic switch tube. The first end of the third resistor is used for being connected with a first reference power supply, and the second end of the third resistor is connected with the first end of the second electronic switching tube. The first end of the second electronic switch tube is used for sampling an ignition starting signal, and the second end of the second electronic switch tube is grounded. And the first end of the second electronic switching tube is connected with the enabling end of the navigation starting circuit. The input power supply end of the navigation starting circuit is used for being connected with a second reference power supply, and the output end of the navigation starting circuit is connected with the starting end of the navigator so as to start the navigator. After the ignition is started, the first electronic switch tube and the second electronic switch are both in an amplification state, namely, the first electronic switch tube and the second electronic switch are both switched on, so that the voltage on the first end of the second electronic switch tube rises, so that the enabling end of the navigation starting circuit is at a high level, so that the navigation starting circuit is started, so that electric energy is output to the starting end of the navigator, and further the navigator is started while the ignition is performed, the operation of independently starting the navigator is omitted, the starting step of the navigator is simplified, and the automatic starting of the navigator is realized.
Please refer to fig. 1, which is a schematic structural diagram of a navigation start control circuit according to an embodiment of the present invention.
Navigation enable control circuit 10 of an embodiment includes an ignition sampling circuit 100 and a navigation enable circuit 200. Referring to fig. 2, the ignition sampling circuit 100 includes a first electronic switch Q1, a second electronic switch Q2, a first resistor R71, a second resistor R72, and a third resistor R62. The second end of the first electronic switch Q1 is used for being connected with an external power supply ACC, the second end of the first electronic switch Q1 is further connected with the control end of the first electronic switch Q1 through the first resistor R71, the control end of the first electronic switch Q1 is grounded through the second resistor R72, and the first end of the first electronic switch Q1 is connected with the control end of the second electronic switch Q2. A first end of the third resistor R62 is configured to be connected to a first reference power supply VDDIO — 3V3, and a second end of the third resistor R62 is connected to a first end of the second electronic switch Q2. The first end of the second electronic switch tube Q2 is used for sampling an ignition start signal ACC _ DET/GPIO9, and the second end of the second electronic switch tube Q2 is grounded. A first end of the second electronic switch Q2 is connected to the enable end EN of the navigation enable circuit 200. Referring to fig. 3, the input power supply terminal IN of the navigation start circuit 200 is used for connecting with the second reference power supply VDD12V, and the output terminal SW of the navigation start circuit 200 is used for connecting with the start terminal of the navigator to start the navigator.
In this embodiment, after the ignition is started, the first electronic switch tube Q1 and the second electronic switch are both in an amplifying state, that is, the first electronic switch tube Q1 and the second electronic switch are both turned on, so that the voltage at the first end of the second electronic switch tube Q2 is increased, and meanwhile, the voltage at the first end of the first electronic switch tube Q1 is increased, so that the enable end EN of the navigation start circuit 200 is at a high level, so as to start the navigation start circuit 200, so as to output electric energy to the start end of the navigator, and further, the navigator is started while the ignition is performed, the operation of separately starting the navigator is omitted, the start step of the navigator is simplified, and the automatic start of the navigator is realized. In this embodiment, the external power supply ACC is a generator started after ignition so as to provide a turn-on voltage for the first electronic switching tube Q1. The first electronic switch Q1 is a PNP type triode, for example, the model of the first electronic switch Q1 is LBC857CWT1G, the first end of the first electronic switch Q1 is a collector of the PNP type triode, the second end of the first electronic switch Q1 is an emitter of the PNP type triode, and the control end of the first electronic switch Q1 is a base of the PNP type triode. The second electronic switching tube Q2 is an NPN type triode, for example, the model of the second electronic switching tube Q2 is LMUN5211T1G, the first end of the second electronic switching tube Q2 is a collector of the NPN type triode, the second end of the second electronic switching tube Q2 is an emitter of the NPN type triode, and the control end of the second electronic switching tube Q2 is a base of the NPN type triode.
In another embodiment, referring to fig. 4, for monitoring and controlling the ignition start signal ACC _ DET/GPIO9 and the enable terminal EN of the navigation start circuit 200, data is generally collected and processed by a corresponding monitoring single-chip microcomputer, for example, the model of the monitoring single-chip microcomputer is ARK1668, so as to monitor the ignition start signal ACC _ DET/GPIO9 and the enable terminal EN of the navigation start circuit 200, and further store history data of each signal, thereby facilitating subsequent tracing of signal history states.
In one embodiment, referring to fig. 2, the ignition sampling circuit 100 further includes a first diode D23, a first terminal of the first electronic switch Q1 is connected to a first terminal of the first diode D23, and a second terminal of the first diode D23 is connected to the enable terminal EN of the navigation enable circuit 200. In this embodiment, the first diode D23 is connected in series between the first end of the first electronic switch Q1 and the enable terminal EN of the navigation enable circuit 200, and the first diode D23 unidirectionally directs the current at the first end of the first electronic switch Q1, so as to provide a corresponding enable electrical signal for the enable terminal EN of the navigation enable circuit 200. Thus, after the ignition signal is detected, the first electronic switch Q1 and the second electronic switch Q2 are turned on simultaneously to deliver a forward current to the first terminal of the first diode D23 to facilitate the start of the navigation start circuit 200. After the switch is turned off, in order to avoid the current from flowing back to the first end of the first electronic switch Q1, i.e. to avoid the reverse current impact on the first electronic switch Q1, the first diode D23 blocks the flowing back current, so that the reverse breakdown of the flowing back current on the first electronic switch Q1 is reduced, and the damage probability of the first electronic switch Q1 is reduced. In another embodiment, the first diode D23 is a schottky diode, which is the type LRB751S-40T1G, the first end of the first diode D23 is the anode of the schottky diode, and the second end of the first diode D23 is the cathode of the schottky diode, so that the fast reverse recovery capability is provided to facilitate the fast on/off of the first diode D23, so that the response speed of the navigation start control circuit is improved.
In one embodiment, referring to fig. 2, the ignition sampling circuit 100 further includes a first capacitor C87, a first terminal of the first electronic switch Q1 is connected to a first terminal of the first capacitor C87, and a second terminal of the first capacitor C87 is grounded. In this embodiment, the first capacitor C87 is connected to the enable terminal EN of the navigation enable circuit 200, for example, the first terminal of the first capacitor C87 is connected to the second terminal of the first diode D23, and the first capacitor C87 filters a signal input to the navigation enable circuit 200, so as to ensure that the signal received by the enable terminal EN of the navigation enable circuit 200 is stable, so that the operating state of the navigation enable circuit 200 can be accurately switched, thereby facilitating to ensure that a navigator is accurately enabled.
Further, referring to fig. 2, the ignition sampling circuit 100 further includes a fourth resistor R510, a first end of the first capacitor C87 is connected to a first end of the fourth resistor R510, and a second end of the fourth resistor R510 is grounded. In this embodiment, the fourth resistor R510 is also connected to the enable terminal EN of the navigation enable circuit 200, such that the first terminal of the fourth resistor R510 is connected to the second terminal of the first diode D23, and the fourth resistor R510 is connected in parallel with the first capacitor C87. Thus, after the shutdown, since the first capacitor C87 needs to discharge and the first diode D23 blocks the current from flowing back to the first end of the first electronic switch Q1, the charge on the first capacitor C87 is consumed by the fourth resistor R510, so that the first capacitor C87 and the fourth resistor R510 form a discharge loop, thereby reducing the influence on the static operating point of the first electronic switch Q1 and the second electronic switch Q2 after the first capacitor C87 discharges, and simultaneously realizing the discharge operation of the first capacitor C87.
In one embodiment, referring to fig. 2, the ignition sampling circuit 100 further includes a fifth resistor R65, a first terminal of the first electronic switch Q1 is connected to a first terminal of the fifth resistor R65, and a second terminal of the fifth resistor R65 is connected to the enable terminal EN of the navigation start circuit 200. In this embodiment, the fifth resistor R65 is connected in series between the first terminal of the first electronic switch Q1 and the enable terminal EN of the navigation enable circuit 200, for example, the second terminal of the first diode D23 is connected to the first terminal of the fifth resistor R65, and the second terminal of the fifth resistor R65 is connected to the enable terminal EN of the navigation enable circuit 200. In this way, the fifth resistor R65 limits the current input to the navigation starter circuit 200, so as to reduce the overcurrent impact on the navigation starter circuit 200, and ensure the normal operation of the navigation starter circuit 200.
In one embodiment, the navigation start circuit includes a voltage reduction circuit and a second capacitor, a first end of the first electronic switch tube is connected to an enable end of the voltage reduction circuit, an output end of the voltage reduction circuit is connected to a first end of the second capacitor, and a second end of the second capacitor is grounded. In this embodiment, the voltage reduction circuit reduces the voltage of the external voltage so as to output the voltage for starting the navigator, the second capacitor is located at the output end of the voltage reduction circuit, and the second capacitor filters the output voltage of the voltage reduction circuit so as to ensure that the starting voltage of the navigator is a direct-current voltage so as to accurately start the navigator. In this embodiment, the second capacitor includes a plurality of capacitors connected in parallel and having different capacitance values, so as to implement multi-stage filtering on the output voltage of the voltage reduction circuit, and further ensure that the start voltage of the navigator is stable, for example, the second capacitor includes capacitors having capacitance values of 10nF, 100nF, 22 μ F, and 47 μ F, respectively.
Further, referring to fig. 3, the voltage-reducing circuit includes a dc voltage reducer U26, a second diode D5, a third capacitor C81, a sixth resistor R64, a seventh resistor R68, and an output inductor L4, an input end of the dc voltage reducer U26 is connected to the second reference power supply VDD12V, an enable end EN of the dc voltage reducer U26 is connected to a first end of the second electronic switching tube Q2, a bootstrap end BST of the dc voltage reducer U26 is connected to an output end of the dc voltage reducer U26 through the third capacitor C81, an output end SW of the dc voltage reducer U26 is further connected to a second end of the second diode D5, a first end of the second diode D5 is grounded, an output end SW of the dc voltage reducer U26 is further connected to a first end of the sixth resistor R64 through the output inductor L4, and a second end of the sixth resistor R64 is connected to a second end of the voltage-reducing resistor R68, the second end of the seventh resistor R68 is grounded, and the feedback end FB of the dc voltage reducer U26 is connected to the first end of the seventh resistor R68. In the embodiment, the dc dropper U26 is used to drop the reference voltage of the second reference power source VDD12V, for example, the model of the dc dropper U26 is MP2359DT, which drops the second reference power source VDD12V with a voltage amplitude of 12V to a specified voltage for outputting. The third capacitor C81 is respectively connected to the bootstrap terminal BST of the dc voltage reducer U26 and the output terminal SW of the dc voltage reducer U26, so that the third capacitor C81 is used as the output bootstrap capacitor of the dc voltage reducer U26, which is helpful for providing a stable voltage value for the output of the dc voltage reducer U26, and improves the output terminal SW of the dc voltage reducer U26 to output a stable dc voltage. The first end of the second diode D5 is connected to the output SW of the dc voltage reducer U26, that is, the first end of the second diode D5 is connected to the first end of the output inductor L4, the second diode D5 is a schottky diode, whose type is LMBR140T1G, the first end of the second diode D5 is the anode of the schottky diode, and the second end of the second diode D5 is the cathode of the schottky diode. When the output inductor L4 generates an induced current, the second diode D5 grounds the induced current to reduce the influence of the induced current generated by the output inductor L4 on the output end SW of the dc voltage reducer U26, thereby further improving the output stability of the dc voltage reducer U26. Moreover, the sixth resistor R64 and the seventh resistor R68 form a series circuit, and the feedback terminal FB of the dc dropper U26 is connected to the first terminal of the seventh resistor R68, and is used to detect the output voltage condition of the dc dropper U26. When the output of the dc dropper U26 is short-circuited, that is, the voltage drop across the seventh resistor R68 is low, that is, the voltage detected by the feedback terminal FB of the dc dropper U26 is too low, for example, the voltage detected by the feedback terminal FB of the dc dropper U26 is lower than 250mv, the frequency feedback comparator of the dc dropper U26 provides a vibrator frequency to avoid the runaway output current limit of the dc dropper U26, that is, the excessive output current of the dc dropper U26 is avoided, and the normal use of the dc dropper U26 is ensured. In addition, the magnitude of the output voltage of the dc voltage reducer U26 can be determined according to a functional relationship between the sixth resistor R64 and the seventh resistor R68, and the specific relationship is as follows:
wherein V is the voltage of the second reference power VDD12V, and V isoutThe voltage of the output end SW of the dc voltage reducer U26 is R1, which is a resistance value of the sixth resistor R64, and R2, which is a resistance value of the seventh resistor R68. In another embodiment, the resistance ratio of the sixth resistor R64 to the seventh resistor R68 is 1.24 to 5.23, for example, the second reference power source VDD12V provides 12V dc voltage, the resistance of the sixth resistor R64 is 30K Ω, the resistance of the seventh resistor R68 is 5.76K Ω, and the resistance ratio of the sixth resistor R64 to the seventh resistor R68 is 5.21, so that the voltage of the output of the dc voltage reducer U26 is 5V, so as to start the navigator.
Thus, under the condition that the reference voltage of the second reference power supply VDD12V is determined, the output voltage of the dc voltage reducer U26 can be adjusted by adjusting the ratio relationship between the sixth resistor R64 and the seventh resistor R68, so as to obtain the voltage for starting the navigator, and ensure that the navigator is started in time after the ignition start signal ACC _ DET/GPIO9 is detected, which is convenient for starting the navigator while igniting, and thus the operation of separately starting the navigator is omitted, and the starting steps of the navigator are simplified.
Further, referring to fig. 3, the dc voltage dropping circuit further includes a fourth capacitor C82, an input terminal of the dc voltage dropper U26 is connected to the first terminal of the fourth capacitor C82, and a second terminal of the fourth capacitor C82 is grounded. In this embodiment, the fourth capacitor C82 is connected to the input terminal of the dc voltage reducer U26, and the fourth capacitor C82 performs filtering processing on the input signal of the dc voltage reducer U26 to filter out the interference signal in the output voltage of the second reference power supply VDD12V, so as to ensure that the second reference power supply VDD12V outputs a stable dc signal to the input terminal of the dc voltage reducer U26, thereby ensuring that the second reference power supply VDD12V outputs a stable dc voltage signal, further reducing the interference on the output of the second reference power supply VDD12V, and further ensuring stable start of the navigator.
In one embodiment, the present application further provides a navigator including the navigation start control circuit described in any of the above embodiments. In this embodiment, the navigation start control circuit includes an ignition sampling circuit and a navigation start circuit. The ignition sampling circuit comprises a first electronic switching tube, a second electronic switching tube, a first resistor, a second resistor and a third resistor. The second end of the first electronic switch tube is used for being connected with an external power supply, the second end of the first electronic switch tube is connected with the control end of the first electronic switch tube through the first resistor, the control end of the first electronic switch tube is grounded through the second resistor, and the first end of the first electronic switch tube is connected with the control end of the second electronic switch tube. The first end of the third resistor is used for being connected with a first reference power supply, and the second end of the third resistor is connected with the first end of the second electronic switching tube. The first end of the second electronic switch tube is used for sampling an ignition starting signal, and the second end of the second electronic switch tube is grounded. And the first end of the second electronic switch tube is connected with the enabling end of the navigation starting circuit. The input power supply end of the navigation starting circuit is used for being connected with a second reference power supply, and the output end of the navigation starting circuit is connected with the starting end of the navigator so as to start the navigator. After the ignition is started, first electronic switch tube and second electronic switch are all in the enlarged state, first electronic switch tube and second electronic switch all switch on promptly, make the voltage on the first end of second electronic switch tube rise, thereby make the enable end of navigation starting circuit be the high level, so that start the navigation starting circuit, thereby be convenient for to the start-up end output electric energy of navigator, and then be convenient for start the navigator when the ignition, the operation of starting the navigator alone has been saved, the start-up step of navigator has been simplified, the automatic start-up of navigator has been realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A navigation initiation control circuit, comprising:
an ignition sampling circuit, which comprises a first electronic switch tube, a second electronic switch tube, a first resistor, a second resistor and a third resistor, the second end of the first electronic switching tube is used for being connected with an external power supply, the second end of the first electronic switching tube is also connected with the control end of the first electronic switching tube through the first resistor, the control end of the first electronic switching tube is grounded through the second resistor, the first end of the first electronic switching tube is connected with the control end of the second electronic switching tube, the first end of the third resistor is used for being connected with a first reference power supply, the second end of the third resistor is connected with the first end of the second electronic switching tube, the first end of the second electronic switching tube is used for sampling an ignition starting signal, and the second end of the second electronic switching tube is grounded;
and the first end of the second electronic switching tube is connected with the enabling end of the navigation starting circuit, the input power supply end of the navigation starting circuit is used for being connected with a second reference power supply, and the output end of the navigation starting circuit is connected with the starting end of the navigator so as to start the navigator.
2. The navigation start-up control circuit of claim 1, wherein the ignition sampling circuit further comprises a first diode, a first terminal of the first electronic switch tube is connected to a first terminal of the first diode, and a second terminal of the first diode is connected to an enable terminal of the navigation start-up circuit.
3. The navigation start-up control circuit of claim 1, wherein the ignition sampling circuit further comprises a first capacitor, a first terminal of the first electronic switch tube is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is grounded.
4. The navigation start control circuit of claim 3, wherein the ignition sampling circuit further comprises a fourth resistor, wherein a first terminal of the first capacitor is connected to a first terminal of the fourth resistor, and wherein a second terminal of the fourth resistor is connected to ground.
5. The navigation start-up control circuit of claim 1, wherein the ignition sampling circuit further comprises a fifth resistor, a first end of the first electronic switch tube is connected with a first end of the fifth resistor, and a second end of the fifth resistor is connected with an enable end of the navigation start-up circuit.
6. The navigation start-up control circuit of claim 1, wherein the navigation start-up control circuit comprises a voltage reduction circuit and a second capacitor, a first end of the first electronic switch tube is connected to an enable end of the voltage reduction circuit, an output end of the voltage reduction circuit is connected to a first end of the second capacitor, and a second end of the second capacitor is grounded.
7. The navigation start-up control circuit according to claim 6, wherein the voltage-reducing circuit includes a dc voltage-reducing device, a second diode, a third capacitor, a sixth resistor, a seventh resistor, and an output inductor, an input terminal of the dc voltage-reducing device is connected to the second reference power supply, an enable terminal of the dc voltage-reducing device is connected to the first terminal of the second electronic switch tube, a bootstrap terminal of the dc voltage-reducing device is connected to an output terminal of the dc voltage-reducing device through the third capacitor, an output terminal of the dc voltage-reducing device is further connected to the second terminal of the second diode, the first terminal of the second diode is grounded, the output terminal of the dc voltage-reducing device is further connected to the first terminal of the sixth resistor through the output inductor, the second terminal of the sixth resistor is connected to the first terminal of the seventh resistor, and the second terminal of the seventh resistor is grounded, and the feedback end of the direct current voltage reducer is connected with the first end of the seventh resistor.
8. The navigation enable control circuit of claim 7, wherein the dc voltage reducer further comprises a fourth capacitor, an input terminal of the dc voltage reducer is connected to a first terminal of the fourth capacitor, and a second terminal of the fourth capacitor is connected to ground.
9. The navigation start-up control circuit of claim 7, wherein a resistance ratio of the sixth resistor to the seventh resistor is 1.24 to 5.23.
10. A navigator characterized by comprising the navigation start control circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122641457.9U CN216526800U (en) | 2021-10-29 | 2021-10-29 | Navigation start control circuit and navigator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122641457.9U CN216526800U (en) | 2021-10-29 | 2021-10-29 | Navigation start control circuit and navigator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216526800U true CN216526800U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122641457.9U Active CN216526800U (en) | 2021-10-29 | 2021-10-29 | Navigation start control circuit and navigator |
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| Country | Link |
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| CN (1) | CN216526800U (en) |
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2021
- 2021-10-29 CN CN202122641457.9U patent/CN216526800U/en active Active
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