CN102723858B - Car-mounted wide power supply voltage stabilization plate and navigation television - Google Patents
Car-mounted wide power supply voltage stabilization plate and navigation television Download PDFInfo
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- CN102723858B CN102723858B CN201210229716.XA CN201210229716A CN102723858B CN 102723858 B CN102723858 B CN 102723858B CN 201210229716 A CN201210229716 A CN 201210229716A CN 102723858 B CN102723858 B CN 102723858B
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Abstract
The invention relates to a car-mounted wide power supply voltage stabilization plate, which is used for filtering alternative-current interference and high voltage in a circuit so as to output stable voltage, and the car-mounted wide power supply voltage stabilization plate comprises an alternative-current filter module which is used for filtering alternative-current interference formed by the fluctuation in an input power supply, a high-voltage filter module which is used for filtering the interference of negative pulse high voltage in the negative input of the alternative-current filter module, a voltage dropping module and a voltage boosting module; and the input end of the alternative-current filter module is used for being connected with the power supply, the alternative-current filter module is connected with the high-voltage filter module, the high-voltage filter module is connected with the voltage dropping module, and the voltage dropping module is connected with the voltage boosting module. Due to the adoption of the car-mounted wide power supply voltage stabilization plate, the alternative-current interference and the high-voltage interference can be filtered before entering the power supply voltage stabilization plate, so that the unfavorable interference in the power supply can be guaranteed not to transfer to a load which is connected with the power supply voltage stabilization plate through the voltage stabilization plate, and the service life of the load can be further guaranteed.
Description
Technical field
The present invention relates to power supply stabilization circuit, particularly relate to a kind of vehicle-mounted wide power voltage stabilization plate and navigation television set.
Background technology
Common vehicle-mounted wide power voltage stabilization plate only has the effect of voltage stabilizing, and when namely voltage is lower than rated voltage, booster circuit starts, and brings the voltage up to rated voltage, and when voltage is higher than rated voltage, reduction voltage circuit starts, and reduces the voltage to rated voltage.But in practical operation, automobile may stop working when startup sparking, and the voltage fluctuation of consequent engine and level is very large, frequency is high, the impulse current that therefore can produce in circuit, can damage power supply backend load, the vehicle-mounted wide power voltage stabilization plate be such as connected with power supply.Simultaneously because the voltage fluctuation in circuit can make to produce AC influence in circuit, the signal in the backend load be connected with power supply is interfered.
Summary of the invention
Based on this, provide a kind of can the vehicle-mounted wide power voltage stabilization plate of AC influence in filter out power and high voltage interference.
A kind of vehicle-mounted wide power voltage stabilization plate, the voltage of stable output for the AC influence in filtering circuit and high voltage, described vehicle-mounted wide power voltage stabilization plate comprises: for the interchange filtering module of the AC influence of the fluctuation formation in filtering input power, for exchanging high voltage filtering module, voltage reduction module and the boost module that in the input of filtering module negative, negative pulsed high voltage power disturbs described in filtering;
The input of described interchange filtering module is used for being connected with power supply, and described interchange filtering module and described high voltage filtering model calling, described high voltage filtering module is connected with described voltage reduction module, and described voltage reduction module is connected with described boost module.
Wherein in an embodiment, described interchange filtering module is common mode inductance XFR4, and described high voltage filtering module is Schottky diode, and described voltage reduction module is step-down chip SY8550, and described boost module is boost chip SY6070;
Described common mode inductance XFR4 comprises positive signal input, negative signal input, positive signal output and negative signal output;
Described step-down chip SY8550 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
Described boost chip SY6070 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The positive signal input of described common mode inductance XFR4 is used for being connected with positive source, the negative signal input of described common mode inductance XFR4 is used for being connected with power cathode, the positive signal output of described common mode inductance XFR4 is connected with the negative pole of described Schottky diode, and the negative signal output of described common mode inductance XFR4 is connected with the positive pole of described Schottky diode;
The positive signal output of described common mode inductance XFR4 is connected with the power input of described step-down chip SY8550, the Enable Pin of described step-down chip SY8550 and earth terminal ground connection, the pressure feedback port input reference voltage of described step-down chip SY8550, the voltage output end of described step-down chip SY8550 is connected with the power input of described boost chip SY6070;
The Enable Pin of described boost chip SY6070 and earth terminal ground connection, the pressure feedback port input reference voltage of described boost chip SY6070, the voltage output end stable output voltage of described boost chip SY6070.
Wherein in an embodiment, described interchange filtering module also comprises filter capacitor C1, the positive pole of described filter capacitor C1 is connected with the positive signal input of described common mode inductance XFR4, and the negative pole of described filter capacitor C1 is connected with the negative signal input of described common mode inductance XFR4.
Wherein in an embodiment, described high voltage filtering module also comprises filter capacitor C2 and electrolytic capacitor filter C3, described filter capacitor C2 is in parallel with described Schottky diode, the positive pole of described electrolytic capacitor filter C3 is connected with the negative pole of described Schottky diode, and the negative pole of described electrolytic capacitor filter C3 is connected with the positive pole of described Schottky diode.
Wherein in an embodiment, described voltage reduction module also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1;
Described divider resistance R5 connects with divider resistance R1, divider resistance R2 successively, the other end ground connection of described divider resistance R5, one end of inductance L 1 described in the other end of described divider resistance R2 connects, described divider resistance R2 is connected with the power input of described boost chip SY6070 with the common port of described inductance L 1, the other end of described inductance L 1 is connected with the voltage output end of described step-down chip SY8550, and the pressure feedback port of described step-down chip SY8550 is connected with the common port of described divider resistance R1 and divider resistance R2;
The positive pole of described diode D2 is connected with the positive pole of described diode D3, the negative pole of described diode D2 is connected with the negative pole of described diode D3, the positive pole of described diode D2 is connected with the voltage output end of described step-down chip SY8550 with the common port of described diode D3 positive pole, the common end grounding of the negative pole of described diode D2 and the negative pole of described diode D3.
Wherein in an embodiment, described boost module also comprises electrolytic capacitor filter C4, filter capacitor C5, electrolytic capacitor filter C8, divider resistance R3, divider resistance R4, divider resistance R6, inductance L 2, diode D4 and diode D5;
Described electrolytic capacitor filter C4 is in parallel with filter capacitor C5, electrolytic capacitor filter C6, the negative pole of described electrolytic capacitor filter C4, one end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6, the positive pole of described electrolytic capacitor filter C4, the other end of filter capacitor C5, the positive pole of electrolytic capacitor filter C6 are connected with the power input of described boost chip SY6070;
Described divider resistance R6 successively with divider resistance R3, divider resistance R4 connects, the other end ground connection of described divider resistance R6, the common port of the negative pole of the other end of described divider resistance R4 and the negative pole of described diode D4 and described diode D5 is connected, the positive pole of described diode D4 and the common port of positive pole of described diode D5 and one end of described inductance L 2, the voltage output end of described boost chip SY6070 connects, the other end of described inductance L 2 is connected with the power input of described boost chip SY6070, the pressure feedback port of described boost chip SY6070 is connected with the common port of described divider resistance R3 and divider resistance R4.
Wherein in an embodiment, described vehicle-mounted wide power voltage stabilization plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, described electrolytic capacitor filter C6 is in parallel with filter capacitor C7, electrolytic capacitor filter C9, the minus earth of the negative pole of described electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the common port of the negative pole of the positive pole of described electrolytic capacitor filter C6, filter capacitor C7, the positive pole of electrolytic capacitor filter C9 and the negative pole of described diode D4 and described diode D5 is connected.
There is provided in addition a kind of can the navigation television set of AC influence in filter out power and high voltage interference.
A kind of navigation television set, it is characterized in that, comprise above-mentioned vehicle-mounted wide power voltage stabilization plate, the board of described navigation inside television sprays three anti-paints, hardware rust prevention by applying liquid material paint, and the screw in described navigation television set is CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
Above-mentioned vehicle-mounted wide power voltage stabilization plate exchanges filtering module and high voltage filtering module by connecting at power input, made the AC influence that produces in the supply and high voltage interference before entering power supply voltage stabilization plate just by filtering, thus can ensure that the unfavorable interference occurred in the supply can not be delivered to by voltage stabilization plate the load be connected with power supply voltage stabilization plate, and then the useful life of proof load.
Above-mentioned navigation television set adopts above-mentioned vehicle-mounted Width funtion voltage stabilization plate, by the AC influence in power supply and high voltage interference filtering, can make do not have interfere information in the display of television set.
Accompanying drawing explanation
Fig. 1 is the function structure chart of vehicle-mounted Width funtion voltage stabilization plate;
Fig. 2 is the circuit theory diagrams of vehicle-mounted Width funtion voltage stabilization plate.
Embodiment
As shown in Figure 1, be the function structure chart of vehicle-mounted wide power voltage stabilization plate.A kind of vehicle-mounted wide power voltage stabilization plate, the voltage of stable output for the AC influence in filtering circuit and high voltage.Power supply voltage stabilization plate comprises: the interchange filtering module 10 of AC influence, high voltage filtering module 20, voltage reduction module 30 and the boost module 40 for negative pulsed high voltage power interference in the input of filtering interchange filtering module 10 negative pole that are formed for the fluctuation in filtering input power.
The input exchanging filtering module 10 is used for being connected with power supply, and exchange filtering module 10 and be connected with high voltage filtering module 20, high voltage filtering module 20 is connected with voltage reduction module 30, and voltage reduction module 30 is connected with boost module 40.
Connect at the power input of vehicle-mounted wide power voltage stabilization plate and exchange filtering module 10, the AC influence caused due to voltage fluctuation in power supply can be made by filtering, thus make in vehicle-mounted wide power voltage stabilization plate can not impulse current, therefore, the interchange in power supply can not impact the load of vehicle-mounted wide power voltage stabilization plate.
After filtering AC influence, after interchange filtering module 10, connect high voltage filtering module 20, disturb for filtering vehicle-mounted wide power voltage stabilization plate high voltage appearance.In automobile primary power supply, flame-out owing to striking sparks, moment height positive negative pulse stuffing fluctuation voltage can be caused, up to 80-90V, therefore, high voltage filtering module 20, after this moment of filtering just positive negative pulse stuffing fluctuation voltage, can ensure that the high voltage in power supply can not impact the load of vehicle-mounted wide power voltage stabilization plate.
Step-down chip 30 is when the voltage inputted is higher than rated voltage, just input voltage is reduced to rated voltage, boost chip 40 is then when the voltage inputted is lower than rated voltage, just, input voltage is elevated to rated voltage, thus ensures that the output voltage of vehicle-mounted wide power voltage stabilization plate is stable rated voltage.
Incorporated by reference to Fig. 2.
Exchanging filtering module 10 is common mode inductance XFR4, and high voltage filtering module 20 is Schottky diode D1, and voltage reduction module 30 is step-down chip SY8550, and boost module 40 is boost chip SY6070.
Common mode inductance XFR4 comprises positive signal input, negative signal input, positive signal output and negative signal output.
Step-down chip SY8550 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal.
Boost chip SY6070 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal.
The positive signal input of common mode inductance XFR4 is used for being connected with positive source, the negative signal input of common mode inductance XFR4 is used for being connected with power cathode, the positive signal output of common mode inductance XFR4 is connected with the negative pole of Schottky diode D1, and the negative signal output of common mode inductance XFR4 is connected with the positive pole of Schottky diode D1.
The positive signal output of common mode inductance XFR4 is connected with the power input of described step-down chip SY8550, the Enable Pin of step-down chip SY8550 and earth terminal ground connection, the pressure feedback port input reference voltage of step-down chip SY8550, the voltage output end of step-down chip SY8550 is connected with the power input of described boost chip SY6070.
The Enable Pin of boost chip SY6070 and earth terminal ground connection, the pressure feedback port input reference voltage of boost chip SY6070, the voltage output end stable output voltage of boost chip SY6070.
In the present embodiment, exchange filtering module and also comprise filter capacitor C1, the positive pole of described filter capacitor C1 is connected with the positive signal input of described common mode inductance XFR4, and the negative pole of described filter capacitor C1 is connected with the negative signal input of described common mode inductance XFR4.
High voltage filtering module 20 also comprises filter capacitor C2 and electrolytic capacitor filter C3, described filter capacitor C2 is in parallel with described Schottky diode, the positive pole of described electrolytic capacitor filter C3 is connected with the negative pole of described Schottky diode, and the negative pole of described electrolytic capacitor filter C3 is connected with the positive pole of described Schottky diode.
Voltage reduction module 30 also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1;
Described divider resistance R5 connects with divider resistance R1, divider resistance R2 successively, the other end ground connection of described divider resistance R5, one end of inductance L 1 described in the other end of described divider resistance R2 connects, described divider resistance R2 is connected with the power input of described boost chip SY6070 with the common port of described inductance L 1, the other end of described inductance L 1 is connected with the voltage output end of described step-down chip SY8550, and the pressure feedback port of described step-down chip SY8550 is connected with the common port of described divider resistance R1 and divider resistance R2;
The positive pole of described diode D2 is connected with the positive pole of described diode D3, the negative pole of described diode D2 is connected with the negative pole of described diode D3, the positive pole of described diode D2 is connected with the voltage output end of described step-down chip SY8550 with the common port of described diode D3 positive pole, the common end grounding of the negative pole of described diode D2 and the negative pole of described diode D3.
Boost module 40 also comprises electrolytic capacitor filter C4, filter capacitor C5, electrolytic capacitor filter C8, divider resistance R3, divider resistance R4, divider resistance R6, inductance L 2, diode D4 and diode D5;
Described electrolytic capacitor filter C4 is in parallel with filter capacitor C5, electrolytic capacitor filter C6, the negative pole of described electrolytic capacitor filter C4, one end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6, the positive pole of described electrolytic capacitor filter C4, the other end of filter capacitor C5, the positive pole of electrolytic capacitor filter C6 are connected with the power input of described boost chip SY6070;
Described divider resistance R6 successively with divider resistance R3, divider resistance R4 connects, the other end ground connection of described divider resistance R6, the common port of the negative pole of the other end of described divider resistance R4 and the negative pole of described diode D4 and described diode D5 is connected, the positive pole of described diode D4 and the common port of positive pole of described diode D5 and one end of described inductance L 2, the voltage output end of described boost chip SY6070 connects, the other end of described inductance L 2 is connected with the power input of described boost chip SY6070, the pressure feedback port of described boost chip SY6070 is connected with the common port of described divider resistance R3 and divider resistance R4.
Vehicle-mounted wide power voltage stabilization plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, described electrolytic capacitor filter C6 is in parallel with filter capacitor C7, electrolytic capacitor filter C9, the minus earth of the negative pole of described electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the common port of the negative pole of the positive pole of described electrolytic capacitor filter C6, filter capacitor C7, the positive pole of electrolytic capacitor filter C9 and the negative pole of described diode D4 and described diode D5 is connected.
Based on above-mentioned all embodiments, the operation principle of vehicle-mounted wide power voltage stabilization plate is as follows:
R1=R3=1K Ω, R5=R6=1.2K Ω, R2=R4=16K Ω, the model of C1=C2=C5=C7=0.1uF, D1 is SMCJ28A, D2, the model of D3, D4 and D5 is CB2045.
In the present embodiment, input voltage is 6V-36V, and the output pressure drop of the voltage output end of step-down chip is 6-12V, and the output pressure drop of the voltage output end of boost chip is 12V.
After power supply is in parallel with filter capacitor C1, then be connected with common mode inductance XFR4, wherein positive source is connected with the electrode input end of common mode inductance XFR4, and power cathode is connected with the negative input of common mode inductance XFR4.Power supply is by after common mode inductance XFR4, and the AC influence comprised in power supply can by common mode inductance XFR4 filtering, and the principle adopted is that common mode inductance XFR4 does not transmit alternating current.After filtering AC influence, input power flows through Schottky diode D1, because the characteristic of Schottky diode D1 can by the high voltage filtering in input power.After after filtration except AC influence and high voltage interference, the processing procedure of input power is just boosting or step-down, namely when the pressure drop of input power is higher than rated voltage, just by step-down chip SY8550, the pressure drop of input power is reduced to rated voltage, when the pressure drop of input power is lower than rated voltage, just by boost chip SY6070, the pressure drop of input power is elevated to rated voltage.Therefore, vehicle-mounted wide power voltage stabilization plate can the glitch-free rated voltage of stable output.
Above-mentioned vehicle-mounted wide power voltage stabilization plate exchanges filtering module and high voltage filtering module by connecting at power input, made the AC influence that produces in the supply and high voltage interference before entering power supply voltage stabilization plate just by filtering, thus can ensure that the unfavorable interference occurred in the supply can not be delivered to by voltage stabilization plate the load be connected with power supply voltage stabilization plate, and then the useful life of proof load.
A kind of navigation television set, comprise above-mentioned vehicle-mounted wide power voltage stabilization plate, the board of navigation inside television sprays three anti-paints, hardware rust prevention by applying liquid material paint, and the screw in navigation television set is CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
In the present embodiment, navigation television set is converted by general television set, the board of general television set inside is sprayed three anti-paints (waterproof, protection against the tide, antifog), inner hardware rust prevention by applying liquid material paint, the inner screw changing stainless steel for the screw connected into, the gold-plated process of external interface.Main improvement adopts above-mentioned vehicle-mounted wide power voltage stabilization plate.Engine of boat and ship produces big current in transient fluctuation and causes electric current band to disturb and high voltage interference, these all cause damage to television set, thus cause common television set short for the useful life on boats and ships, therefore, after changing the power supply in television set into above-mentioned vehicle-mounted wide power, television set can adapt to the use on boats and ships.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a vehicle-mounted wide power voltage stabilization plate, the voltage of stable output for the AC influence in filtering circuit and high voltage, it is characterized in that, described vehicle-mounted wide power voltage stabilization plate comprises: for the interchange filtering module of the AC influence of the fluctuation formation in filtering input power, for exchanging high voltage filtering module, voltage reduction module and the boost module that in the input of filtering module negative, negative pulsed high voltage power disturbs described in filtering;
The input of described interchange filtering module is used for being connected with power supply, described interchange filtering module and described high voltage filtering model calling, and described high voltage filtering module is connected with described voltage reduction module, and described voltage reduction module is connected with described boost module; Described high voltage filtering module is used for the flame-out moment height positive negative pulse stuffing fluctuation voltage caused of sparking in filtering automobile primary power supply; Described interchange filtering module is common mode inductance XFR4, and described high voltage filtering module is Schottky diode, and described voltage reduction module is step-down chip SY8550, and described boost module is boost chip SY6070;
Described common mode inductance XFR4 comprises positive signal input, negative signal input, positive signal output and negative signal output;
Described step-down chip SY8550 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
Described boost chip SY6070 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The positive signal input of described common mode inductance XFR4 is used for being connected with positive source, the negative signal input of described common mode inductance XFR4 is used for being connected with power cathode, the positive signal output of described common mode inductance XFR4 is connected with the negative pole of described Schottky diode, and the negative signal output of described common mode inductance XFR4 is connected with the positive pole of described Schottky diode;
The positive signal output of described common mode inductance XFR4 is connected with the power input of described step-down chip SY8550, the Enable Pin of described step-down chip SY8550 and earth terminal ground connection, the pressure feedback port input reference voltage of described step-down chip SY8550, the voltage output end of described step-down chip SY8550 is connected with the power input of described boost chip SY6070;
The Enable Pin of described boost chip SY6070 and earth terminal ground connection, the pressure feedback port input reference voltage of described boost chip SY6070, the voltage output end stable output voltage of described boost chip SY6070.
2. vehicle-mounted wide power voltage stabilization plate according to claim 1, it is characterized in that, described interchange filtering module also comprises filter capacitor C1, the positive pole of described filter capacitor C1 is connected with the positive signal input of described common mode inductance XFR4, and the negative pole of described filter capacitor C1 is connected with the negative signal input of described common mode inductance XFR4.
3. vehicle-mounted wide power voltage stabilization plate according to claim 1, it is characterized in that, described high voltage filtering module also comprises filter capacitor C2 and electrolytic capacitor filter C3, described filter capacitor C2 is in parallel with described Schottky diode, the positive pole of described electrolytic capacitor filter C3 is connected with the negative pole of described Schottky diode, and the negative pole of described electrolytic capacitor filter C3 is connected with the positive pole of described Schottky diode.
4. vehicle-mounted wide power voltage stabilization plate according to claim 1, is characterized in that, described voltage reduction module also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1;
Described divider resistance R5 connects with divider resistance R1, divider resistance R2 successively, the other end ground connection of described divider resistance R5, one end of inductance L 1 described in the other end of described divider resistance R2 connects, described divider resistance R2 is connected with the power input of described boost chip SY6070 with the common port of described inductance L 1, the other end of described inductance L 1 is connected with the voltage output end of described step-down chip SY8550, and the pressure feedback port of described step-down chip SY8550 is connected with the common port of described divider resistance R1 and divider resistance R2;
The positive pole of described diode D2 is connected with the positive pole of described diode D3, the negative pole of described diode D2 is connected with the negative pole of described diode D3, the negative pole of described diode D2 is connected with the voltage output end of described step-down chip SY8550 with the common port of described diode D3 negative pole, the common end grounding of the positive pole of described diode D2 and the positive pole of described diode D3.
5. vehicle-mounted wide power voltage stabilization plate according to claim 1, it is characterized in that, described boost module also comprises electrolytic capacitor filter C4, filter capacitor C5, electrolytic capacitor filter C8, divider resistance R3, divider resistance R4, divider resistance R6, inductance L 2, diode D4 and diode D5;
Described electrolytic capacitor filter C4 is in parallel with filter capacitor C5, electrolytic capacitor filter C6, the negative pole of described electrolytic capacitor filter C4, one end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6, the positive pole of described electrolytic capacitor filter C4, the other end of filter capacitor C5, the positive pole of electrolytic capacitor filter C6 are connected with the power input of described boost chip SY6070;
Described divider resistance R6 successively with divider resistance R3, divider resistance R4 connects, the other end ground connection of described divider resistance R6, the common port of the negative pole of the other end of described divider resistance R4 and the negative pole of described diode D4 and described diode D5 is connected, the positive pole of described diode D4 and the common port of positive pole of described diode D5 and one end of described inductance L 2, the voltage output end of described boost chip SY6070 connects, the other end of described inductance L 2 is connected with the power input of described boost chip SY6070, the pressure feedback port of described boost chip SY6070 is connected with the common port of described divider resistance R3 and divider resistance R4.
6. vehicle-mounted wide power voltage stabilization plate according to claim 5, it is characterized in that, described vehicle-mounted wide power voltage stabilization plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, described electrolytic capacitor filter C6 is in parallel with filter capacitor C7, electrolytic capacitor filter C9, the minus earth of the negative pole of described electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the common port of the negative pole of the positive pole of described electrolytic capacitor filter C6, filter capacitor C7, the positive pole of electrolytic capacitor filter C9 and the negative pole of described diode D4 and described diode D5 is connected.
7. a navigation television set, it is characterized in that, comprise the vehicle-mounted wide power voltage stabilization plate described in the claims 1-6 any one, the board of described navigation inside television sprays three anti-paints, hardware rust prevention by applying liquid material paint, the screw in described navigation television set is CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
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| CN202721602U (en) * | 2012-07-04 | 2013-02-06 | 铭薪电子（深圳）有限公司 | Vehicle-mounted wide power supply voltage stabilization plate and navigation television |
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| Publication number | Publication date |
|---|---|
| CN102723858A (en) | 2012-10-10 |
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