CN202748692U - One-key starting system for motor vehicle - Google Patents

One-key starting system for motor vehicle Download PDF

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Publication number
CN202748692U
CN202748692U CN 201220380390 CN201220380390U CN202748692U CN 202748692 U CN202748692 U CN 202748692U CN 201220380390 CN201220380390 CN 201220380390 CN 201220380390 U CN201220380390 U CN 201220380390U CN 202748692 U CN202748692 U CN 202748692U
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China
Prior art keywords
resistance
operational amplifier
electric capacity
pnp triode
ground connection
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Expired - Lifetime
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CN 201220380390
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Chinese (zh)
Inventor
吉英存
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Beijing Jingwei Hirain Tech Co Ltd
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Beijing Jingwei Hirain Tech Co Ltd
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Priority to CN 201220380390 priority Critical patent/CN202748692U/en
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Abstract

The utility model provides a one-key starting system for a motor vehicle. The one-key starting system comprises a remote control emitter and a starting switch controller, the starting switch controller comprises a high-low voltage conversion circuit, the high-low voltage conversion circuit comprises an operational amplifier, an N-channel metal oxide semiconductor (NMOS) pipe, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first plug-and-play (PNP) triode, a second PNP triode, a first capacitor and a second capacitor, and both the operational amplifier and the NMOS pipe use high voltage devices. According to the one-key starting system, the high-low voltage conversion circuit in the starting switch controller is not required to be externally connected with capacitors, scales of circuit modules and device scales are small, and only part of the components require the high voltage devices so that the whole system has the advantages of being low in energy consumption, small in area, concise in structure and low in temperature coefficient.

Description

Motor vehicle one key start-up system
Technical field
The utility model belongs to vehicle electric field, relates in particular to a kind of motor vehicle one key start-up system.
Background technology
Motor vehicle one key start-up system is the part in Hyundai Motor electronics and industrial electronic field, generally include remote control transmitter and starting switch controller, wear the people of this remote control transmitter and can realize that startup is flame-out as long as press gently the starting switch key of next key start-up system, avoided the worry of losing key, looking for key.
In an above-mentioned key start-up system, the chip power voltage of starting switch controller often is high value, therefore the chip internal device needs high-pressure process to avoid by the external power source high-voltage breakdown, but integrated to carry out signal when processing at the needs large-scale circuit, high tension apparatus is but because area occupied is larger, device performance is relatively poor and do not have application advantage, but with the low pressure process device as paying the utmost attention to, therefore need a kind of level shifter circuit to produce the required built-in supply voltage of low-voltage device, when suitably designing, this magnitude of voltage also can be used as reference voltage source and provides voltage reference for system simultaneously.
Traditional level shifter circuit often adopts the LDO circuit structure, as shown in Figure 1, comprise reference voltage generating circuit, LDO circuit and external electric capacity of voltage regulation C1, LDO feedback control loop dominant pole is arranged on the Vcc output terminal, and inferior dominant pole is arranged on operational amplifier output terminal.Outside than high power supply voltage in order to resist, reference voltage generating circuit, LDO circuit need to design with high tension apparatus, so circuit scale, used area and power consumption are often larger, and the external electric capacity of voltage regulation C1 of chip has improved system cost.
The utility model content
In view of this, the utility model purpose is to provide a kind of motor vehicle one key start-up system, to solve the shortcoming that the circuit system scale is large, power consumption is high and cost is large in the prior art.
For achieving the above object, the utility model provides following technical scheme:
A kind of motor vehicle one key start-up system comprises remote control transmitter and starting switch controller, and wherein, described starting switch controller comprises level shifter circuit;
Described level shifter circuit comprises: operational amplifier, NMOS pipe, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, a PNP triode, the 2nd PNP triode, the first electric capacity and the second electric capacity, wherein,
The output terminal of described operational amplifier respectively with the grid of described NMOS pipe be connected the first end of the second electric capacity and be connected the second end ground connection of described the second electric capacity;
The power end of described operational amplifier is connected drain electrode and is connected respectively outer power voltage VDDA, the ground end of described operational amplifier and the substrate ground connection of NMOS pipe with the NMOS pipe;
The source electrode of described NMOS pipe is connected with described the 4th resistance, the 5th resistance and the first end of electric capacity of being connected respectively, and as the output terminal of described level shifter circuit, the second end ground connection of described the first electric capacity;
The positive input terminal of described operational amplifier is connected with the first end of the second end of described the 4th resistance, described the second resistance and the emitter of a described PNP triode respectively, the second end ground connection of described the second resistance, the base stage of a described PNP triode is connected and ground connection with self collector;
The negative input end of described operational amplifier is connected with the first end of the second end of described the 5th resistance, described the first resistance and the first end of described the 3rd resistance respectively, the second end ground connection of described the 3rd resistance;
The second end of described the first resistance is connected with the emitter of described the 2nd PNP triode, and the base stage of described the 2nd PNP triode is connected and ground connection with self collector.
Preferably, in above-mentioned motor vehicle one key start-up system, the dominant pole of described level shifter circuit is arranged on the output terminal of described operational amplifier, and inferior dominant pole is arranged on the first end of described the first electric capacity.
Preferably, in above-mentioned motor vehicle one key start-up system, the dominant pole of described level shifter circuit is arranged on the first end of described the first electric capacity, and inferior dominant pole is arranged on the output terminal of described operational amplifier, and the value of described the second electric capacity is set to zero.
Preferably, in above-mentioned motor vehicle one key start-up system, described the 2nd PNP triode is composed in parallel by N the parameter PNP triode identical with a described PNP triode, and wherein, N is natural number, and N 〉=2.
Preferably, in above-mentioned motor vehicle one key start-up system, described the 4th resistance equates with the resistance of the 5th resistance, and described the second resistance equates with the resistance of the 3rd resistance.
Preferably, in above-mentioned motor vehicle one key start-up system, described operational amplifier and NMOS pipe all adopt high tension apparatus.
The technical scheme that is provided by above the embodiment of the present application as seen, in the chip circuit of the starting switch controller of the utility model motor vehicle one key start-up system, need not external capacitor, and do not need all to adopt high tension apparatus, therefore whole circuit scale is less, so energy consumption is lower, and simple in structure.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of level shifter circuit of the prior art;
Fig. 2 is the structural representation of motor vehicle one key start-up system of the present utility model;
Fig. 3 is the integrated circuit structural representation of the level shifter circuit in the starting switch controller in the motor vehicle one key start-up system of the present utility model;
Fig. 4 is low-tension supply voltage or the temperature variant Tcm curve map of reference voltage source VCC of circuit shown in Figure 3.
Embodiment
For quote and know for the purpose of, writing a Chinese character in simplified form or abridging of hereinafter using is summarized as follows:
NMOS:N-Mental-Oxide-Semiconductor, Metal-oxide-semicondutor;
OPA:operational amplifier, operational amplifier.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
At first with reference to figure 2, Fig. 2 is the structural representation of motor vehicle one key start-up system of the present utility model.As shown in the figure, described system comprises starting switch controller 1 and remote control transmitter 2, and wherein, starting switch controller 1 comprises level shifter circuit 11.Need to prove, other modules or unit about in starting switch controller and the remote control transmitter do not illustrate in the drawings.
Fig. 3 shows the integrated circuit structural representation of the level shifter circuit in the starting switch controller in the utility model motor vehicle one key start-up system.As shown in Figure 3, level shifter circuit of the present utility model comprises: operational amplifier OPA, NMOS pipe NM1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, a PNP triode Q1, the 2nd PNP triode Q2, the first capacitor C 1 and the second capacitor C 2.Wherein,
The output terminal of OPA is connected first end with the grid of NM1 respectively and is connected the second end ground connection of C2 with C2; The power end of OPA is connected drain electrode and is connected respectively outer power voltage VDDA, the ground end of OPA and the substrate ground connection of NM1 with NM1; The source electrode of NM1 is connected first end with R4, R5 respectively and is connected with C1, and as the output terminal VCC of described level shifter circuit, the second end ground connection of C1; The positive input terminal of OPA is connected with the second end of R4, the first end of R2 and the emitter of Q1 respectively, the second end ground connection of R2, and the base stage of Q1 is connected and ground connection with self collector; The negative input end of OPA is connected with the second end of R5, the first end of R1 and the first end of R3 respectively, the second end ground connection of R3; The second end of R1 is connected with the emitter of Q2, and the base stage of Q2 is connected and ground connection with self collector.
Further, because described OPA is connected with NM1 and is connected with outer power voltage VDDA, so OPA and NM1 all adopt high tension apparatus, be used for the opposing external high voltage, avoid device breakdown.C1 is as electric capacity of voltage regulation, and C2 is as building-out capacitor, and Q2 composes in parallel by N (N 〉=2, N belongs to natural number) PNP triode that parameter is identical with Q1 at least, and concrete number can be decided according to actual conditions, repeats no more herein.
The technical scheme that is provided by above the embodiment of the present application as seen, compare with circuit of the prior art, in the utility model motor vehicle one key start-up system in the starting switch controller level shifter circuit need not external capacitor, and do not need all to adopt high tension apparatus, therefore whole circuit scale is less, so energy consumption is lower, and simple in structure.
Next elaborate the principle of work of described level shifter circuit.
At first, resistance value is set to R4=R5, R2=R3.When circuit powers on normal operation, OPA controls the NM1 electric current by adjusting output voltage, OPA positive-negative input end voltage is approached to be equated, the first end of R4, R5 connects simultaneously, therefore the electric current that flows through resistance R 2, R3, R4, R5, triode Q1, Q2 has following relation: IR2=IR3, IR4=IR5, simultaneously IQ1=IQ2.Therefore the pressure drop on the R1 is dVbe=Vbe1-Vbe2=(KT/q) * ln (n), the electric current that flows through R1 is IR1=(KT/q) * ln (n)/R1, the electric current that flows through R3 is IR3=Vbe1/R3, therefore flow through electric current I R5=IR1+IR3=(KT/q) the * ln (n) of R5/R1+Vbe1/R3, so the magnitude of voltage expression formula of VCC is:
（(KT/q)*ln(n)/R1+Vbe1/R3）*R5+Vbe1=VCC (1)
Wherein, according to situation about using, VCC both can be used as internal power source voltage, also can be as the reference voltage of Circuits System.When VCC when the reference voltage, because demand motive ability not, so do not need very large the setting of the device breadth length ratio of NM1; When VCC when the internal power source voltage, then can the device breadth length ratio of NM1 arrange larger.
In a kind of embodiment of the present utility model, in order to reduce the voltage change ratio of VCC in temperature range, it is 0 that VCC voltage change ratio when normal temperature is varied with temperature, and at first, differentiate is to formula (1):
(K/q)*ln(n)*R5/R1+（Vbe1/T）*（R5/R3+1）=VCC/T︱T=27℃=0 (2)
Because Vbe1/T is about-1.5mV/K(according to technique is different can be different), (K/q) be about 0.087mV/K.Formula (1), formula (2) are formed system of equations, VCC is set internal power source voltage value or reference voltage value, can solve the ratio of resistance R 1:R3:R5 by system of equations, and require resistance R 1, R3, R5 resistance are arranged according to system power dissipation, thus, can reduce the voltage change ratio of VCC in temperature range.Fig. 4 is the temperature variant Tcm curve map of VCC, as can be seen from the figure, level shifter circuit of the present utility model, in-40 ℃-125 ℃ scope, violent variation does not appear in the value of VCC, and voltage change ratio has obtained reducing well.And no matter VCC is used as internal power source voltage or the reference voltage of Circuits System, its temperature is floated all less.
In a kind of embodiment of the present utility model, for the less situation of load circuit scale, the dominant pole of the utility model level shifter circuit can be arranged on the OPA output terminal, C2 is building-out capacitor, and inferior dominant pole is arranged on the VCC place, and C1 is electric capacity of voltage regulation.And for the larger situation of load circuit, the dominant pole of the utility model level shifter circuit can be arranged on the VCC place, and C1 is the larger electric capacity of voltage regulation of capacitance, inferior dominant pole is arranged on the OPA output terminal, and the capacitance of C2 is set to zero.
In sum, level shifter circuit in the starting switch controller of the utility model motor vehicle one key start-up system is compared with prior art shown in Figure 1, need not external capacitor, circuit module and device scale are less, therefore and do not need all to adopt high tension apparatus, whole circuit rule have low-power consumption, low area, characteristics simple for structure.Because of VCC coincidence formula (2), by the resistance of resistance R 1, R3, R5 reasonably is set, can reduce the voltage change ratio of VCC in temperature range so in addition, temperature coefficient is lower.
Need to prove, above-described embodiment only is the application's preferred embodiment, does not cause the restriction to the application's open and protection domain.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, in other embodiments realization.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (6)

1. motor vehicle one a key start-up system comprises remote control transmitter and starting switch controller, it is characterized in that, described starting switch controller comprises level shifter circuit;
Described level shifter circuit comprises: operational amplifier, NMOS pipe, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, a PNP triode, the 2nd PNP triode, the first electric capacity and the second electric capacity, wherein,
The output terminal of described operational amplifier respectively with the grid of described NMOS pipe be connected the first end of the second electric capacity and be connected the second end ground connection of described the second electric capacity;
The power end of described operational amplifier be connected the drain electrode of NMOS pipe and connect respectively outer power voltage VDDA, the ground end of described operational amplifier and the substrate ground connection of described NMOS pipe;
The source electrode of described NMOS pipe is connected with described the 4th resistance, the 5th resistance and the first end of electric capacity of being connected respectively, and as the output terminal of described level shifter circuit, the second end ground connection of described the first electric capacity;
The positive input terminal of described operational amplifier is connected with the first end of the second end of described the 4th resistance, described the second resistance and the emitter of a described PNP triode respectively, the second end ground connection of described the second resistance, the base stage of a described PNP triode is connected and ground connection with self collector;
The negative input end of described operational amplifier is connected with the first end of the second end of described the 5th resistance, described the first resistance and the first end of described the 3rd resistance respectively, the second end ground connection of described the 3rd resistance;
The second end of described the first resistance is connected with the emitter of described the 2nd PNP triode, and the base stage of described the 2nd PNP triode is connected and ground connection with self collector.
2. the system as claimed in claim 1 is characterized in that, the dominant pole of described level shifter circuit is arranged on the output terminal of described operational amplifier, and inferior dominant pole is arranged on the first end of described the first electric capacity.
3. the system as claimed in claim 1 is characterized in that, the dominant pole of described level shifter circuit is arranged on the first end of described the first electric capacity, and inferior dominant pole is arranged on the output terminal of described operational amplifier, and the value of described the second electric capacity is set to zero.
4. the system as claimed in claim 1 is characterized in that, described the 2nd PNP triode is composed in parallel by N the parameter PNP triode identical with a described PNP triode, and wherein, N is natural number, and N 〉=2.
5. the system as claimed in claim 1 is characterized in that, described the 4th resistance equates with the resistance of the 5th resistance, and described the second resistance equates with the resistance of the 3rd resistance.
6. the system as claimed in claim 1 is characterized in that, described operational amplifier and NMOS pipe all adopt high tension apparatus.
CN 201220380390 2012-08-02 2012-08-02 One-key starting system for motor vehicle Expired - Lifetime CN202748692U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220380390 CN202748692U (en) 2012-08-02 2012-08-02 One-key starting system for motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220380390 CN202748692U (en) 2012-08-02 2012-08-02 One-key starting system for motor vehicle

Publications (1)

Publication Number Publication Date
CN202748692U true CN202748692U (en) 2013-02-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220380390 Expired - Lifetime CN202748692U (en) 2012-08-02 2012-08-02 One-key starting system for motor vehicle

Country Status (1)

Country Link
CN (1) CN202748692U (en)

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GR01 Patent grant
CP03 Change of name, title or address

Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020

Patentee after: Beijing Jingwei Hengrun Technology Co.,Ltd.

Address before: B1 / F, Northern Territory, Dongsheng Science Park, 66 xixiaokou Road, Haidian District, Beijing 100192

Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd.

CP03 Change of name, title or address
CX01 Expiry of patent term

Granted publication date: 20130220

CX01 Expiry of patent term