CN102723858A - 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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- CN102723858A CN102723858A CN201210229716XA CN201210229716A CN102723858A CN 102723858 A CN102723858 A CN 102723858A CN 201210229716X A CN201210229716X A CN 201210229716XA CN 201210229716 A CN201210229716 A CN 201210229716A CN 102723858 A CN102723858 A CN 102723858A
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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 stabilizing plate and navigation television set.
Background technology
Common vehicle-mounted wide power voltage stabilizing plate only has the effect of voltage stabilizing, and when promptly voltage was lower than rated voltage, booster circuit started, and brings the voltage up to rated voltage, and when voltage was higher than rated voltage, reduction voltage circuit started, and reduces the voltage to rated voltage.But in practical operation, automobile may stop working when starting sparking, and the voltage fluctuation of consequent engine and level is very big; Frequency is high; The impulse current that therefore can produce in the circuit can damage the load of power supply rear end, the vehicle-mounted wide power voltage stabilizing plate that for example is connected with power supply.Exchange interference because the voltage fluctuation meeting in the circuit makes to produce in the circuit simultaneously, make that the signal in the rear end load that is connected with power supply is interfered.
Summary of the invention
Based on this, a kind of interchange interference and vehicle-mounted wide power voltage stabilizing plate of high voltage interference in can filter out power is provided.
A kind of vehicle-mounted wide power voltage stabilizing plate; Be used for interchange interference and the high voltage of filtering circuit and export stable voltage, said vehicle-mounted wide power voltage stabilizing plate comprises: be used for the interchange filtering module that interchange that the fluctuation of filtering input power supply forms disturbs, high voltage filtering module, step-down module and the boost module that is used for the said interchange filtering of filtering module negative pole input negative pulse high voltage interference;
The input of said interchange filtering module is used for being connected with power supply, and said interchange filtering module is connected with said high voltage filtering module, and said high voltage filtering module is connected with said step-down module, and said step-down module is connected with said boost module.
Among embodiment, said interchange filtering module is common mode inductance XFR4 therein, and said high voltage filtering module is a Schottky diode, and said step-down module is step-down chip SY8550, and said boost module is the chip SY6070 that boosts;
Said common mode inductance XFR4 comprises positive signal input, negative signal input, positive signal output and negative signal output;
Said step-down chip SY8550 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The said chip SY6070 that boosts comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The positive signal input of said common mode inductance XFR4 is used for being connected with positive source; The negative signal input of said common mode inductance XFR4 is used for being connected with power cathode; The positive signal output of said common mode inductance XFR4 is connected with the negative pole of said Schottky diode, and the negative signal output of said common mode inductance XFR4 is connected with the positive pole of said Schottky diode;
The positive signal output of said common mode inductance XFR4 is connected with the power input of said step-down chip SY8550; The Enable Pin of said step-down chip SY8550 and earth terminal ground connection; The pressure feedback port input reference voltage of said step-down chip SY8550, the voltage output end of said step-down chip SY8550 is connected with the said power input that boosts chip SY6070;
The Enable Pin of the said chip SY6070 that boosts and earth terminal ground connection, the pressure feedback port input reference voltage of the said chip SY6070 that boosts, the voltage output end output burning voltage of the said chip SY6070 that boosts.
Therein among embodiment; Said interchange filtering module also comprises filter capacitor C1; The positive pole of said filter capacitor C1 is connected with the positive signal input of said common mode inductance XFR4, and the negative pole of said filter capacitor C1 is connected with the negative signal input of said common mode inductance XFR4.
Therein among embodiment; Said high voltage filtering module also comprises filter capacitor C2 and electrolytic capacitor filter C3; Said filter capacitor C2 is parallelly connected with said Schottky diode; The positive pole of said electrolytic capacitor filter C3 is connected with the negative pole of said Schottky diode, and the negative pole of said electrolytic capacitor filter C3 is connected with the positive pole of said Schottky diode.
Among embodiment, said step-down module also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1 therein;
Said divider resistance R5 connects with divider resistance R1, divider resistance R2 successively; The other end ground connection of said divider resistance R5; One end of the said inductance L 1 of the other end of said divider resistance R2 connects; Said divider resistance R2 is connected with the described power input that boosts chip SY6070 with the common port of said inductance L 1; The other end of said inductance L 1 is connected with the voltage output end of said step-down chip SY8550, and the pressure feedback port of said step-down chip SY8550 is connected with the common port of said divider resistance R1 and divider resistance R2;
The positive pole of said diode D2 is connected with the positive pole of said diode D3; The negative pole of said diode D2 is connected with the negative pole of said diode D3; The positive pole of said diode D2 is connected the common end grounding of the negative pole of the negative pole of said diode D2 and said diode D3 with the anodal common port of said diode D3 with the voltage output end of said step-down chip SY8550.
Among embodiment, said 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 therein;
Said electrolytic capacitor filter C4 and filter capacitor C5, electrolytic capacitor filter C6 are parallelly connected; The negative pole of said electrolytic capacitor filter C4; The end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6; The positive pole of said electrolytic capacitor filter C4, the positive pole of the other end of filter capacitor C5, electrolytic capacitor filter C6 is connected with the said power input that boosts chip SY6070;
Said divider resistance R6 connects with divider resistance R3, divider resistance R4 successively; The other end ground connection of said divider resistance R6; The other end of said divider resistance R4 is connected with the negative pole of said diode D4 and the common port of the negative pole of said diode D5; The common port of the positive pole of said diode D4 and the positive pole of said diode D5 is connected with an end of said inductance L 2, the said voltage output end that boosts chip SY6070; The other end of said inductance L 2 is connected with the said power input that boosts chip SY6070, and the pressure feedback port of the said chip SY6070 that boosts is connected with the common port of said divider resistance R3 and divider resistance R4.
Therein among embodiment; Said vehicle-mounted wide power voltage stabilizing plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9; Said electrolytic capacitor filter C6 and filter capacitor C7, electrolytic capacitor filter C9 are parallelly connected; The minus earth of the negative pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the positive pole of the positive pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9 is connected with the common port of the negative pole of said diode D4 and the negative pole of said diode D5.
A kind of interchange interference and navigation television set of high voltage interference in can filter out power is provided in addition.
A kind of navigation television set is characterized in that, comprises above-mentioned vehicle-mounted wide power voltage stabilizing plate, the integrated circuit board spraying three anti-lacquers that said navigation television set is inner, and hardware rust prevention by applying liquid material lacquer, the screw in the said navigation television set are the CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
Above-mentioned vehicle-mounted wide power voltage stabilizing plate exchanges filtering module and high voltage filtering module through connecting at power input; Make the interchange interference and the high voltage interference that in power supply, produce get into power supply voltage stabilizing plate before just by filtering; Thereby can guarantee that the unfavorable interference that in power supply, occurs can not be delivered to the load that is connected with power supply voltage stabilizing plate through the voltage stabilizing plate, and then the useful life of proof load.
Above-mentioned navigation television set adopts above-mentioned vehicle-mounted wide voltage voltage stabilizing plate, can be with interchange interference in the power supply and high voltage interference filtering, and making does not have interfere information in the shows signal of television set.
Description of drawings
Fig. 1 is the modular structure figure of vehicle-mounted wide voltage voltage stabilizing plate;
Fig. 2 is the circuit theory diagrams of vehicle-mounted wide voltage voltage stabilizing plate.
Embodiment
As shown in Figure 1, be the modular structure figure of vehicle-mounted wide power voltage stabilizing plate.A kind of vehicle-mounted wide power voltage stabilizing plate is used for interchange interference and the high voltage of filtering circuit and exports stable voltage.Power supply voltage stabilizing plate comprises: be used for interchange filtering module 10 that interchange that the fluctuation of filtering input power supply forms disturbs, be used for high voltage filtering module 20, step-down module 30 and boost module 40 that filtering exchanges filtering module 10 negative poles input negative pulse high voltage interference.
The input that exchanges filtering module 10 is used for being connected with power supply, exchanges filtering module 10 and is connected with high voltage filtering module 20, and high voltage filtering module 20 is connected with step-down module 30, and step-down module 30 is connected with boost module 40.
Power input at vehicle-mounted wide power voltage stabilizing plate connects interchange filtering module 10; Can make in the power supply because the interchange that voltage fluctuation causes is disturbed by filtering; Can impulse current thereby make in the vehicle-mounted wide power voltage stabilizing plate not; Therefore, the interchange in the power supply can not impact the load of vehicle-mounted wide power voltage stabilizing plate.
After filtering exchanges interference, after exchanging filtering module 10, connect high voltage filtering module 20, be used for the vehicle-mounted wide power voltage stabilizing of filtering plate high voltage appearance and disturb.In the automobile main power source; Because sparking is flame-out; Can cause moment height positive negative pulse stuffing fluctuation voltage, up to 80-90V, therefore; High voltage filtering module 20 can guarantee that the high voltage in the power supply can not impact the load of vehicle-mounted wide power voltage stabilizing plate moment behind filtering this height positive negative pulse stuffing fluctuation voltage.
When step-down chip 30 is higher than rated voltage at the voltage of input; Just input voltage is reduced to rated voltage; The chip 40 that boosts then is when the voltage of input is lower than rated voltage; Just, input voltage is elevated to rated voltage, thus the output voltage that guarantees vehicle-mounted wide power voltage stabilizing plate is stable rated voltage.
Please combine Fig. 2.
Exchanging filtering module 10 is common mode inductance XFR4, and high voltage filtering module 20 is Schottky diode D1, and step-down module 30 is step-down chip SY8550, and boost module 40 is the chip SY6070 that boosts.
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.
The chip SY6070 that boosts 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 said 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 said power input that boosts chip SY6070.
Boost Enable Pin and the earth terminal ground connection of chip SY6070, the pressure feedback port input reference voltage of the chip SY6070 that boosts, the voltage output end output burning voltage of the chip SY6070 that boosts.
In the present embodiment, exchange the filtering module and also comprise filter capacitor C1, the positive pole of said filter capacitor C1 is connected with the positive signal input of said common mode inductance XFR4, and the negative pole of said filter capacitor C1 is connected with the negative signal input of said common mode inductance XFR4.
High voltage filtering module 20 also comprises filter capacitor C2 and electrolytic capacitor filter C3; Said filter capacitor C2 is parallelly connected with said Schottky diode; The positive pole of said electrolytic capacitor filter C3 is connected with the negative pole of said Schottky diode, and the negative pole of said electrolytic capacitor filter C3 is connected with the positive pole of said Schottky diode.
Step-down module 30 also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1;
Said divider resistance R5 connects with divider resistance R1, divider resistance R2 successively; The other end ground connection of said divider resistance R5; One end of the said inductance L 1 of the other end of said divider resistance R2 connects; Said divider resistance R2 is connected with the described power input that boosts chip SY6070 with the common port of said inductance L 1; The other end of said inductance L 1 is connected with the voltage output end of said step-down chip SY8550, and the pressure feedback port of said step-down chip SY8550 is connected with the common port of said divider resistance R1 and divider resistance R2;
The positive pole of said diode D2 is connected with the positive pole of said diode D3; The negative pole of said diode D2 is connected with the negative pole of said diode D3; The positive pole of said diode D2 is connected the common end grounding of the negative pole of the negative pole of said diode D2 and said diode D3 with the anodal common port of said diode D3 with the voltage output end of said step-down chip SY8550.
Said electrolytic capacitor filter C4 and filter capacitor C5, electrolytic capacitor filter C6 are parallelly connected; The negative pole of said electrolytic capacitor filter C4; The end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6; The positive pole of said electrolytic capacitor filter C4, the positive pole of the other end of filter capacitor C5, electrolytic capacitor filter C6 is connected with the said power input that boosts chip SY6070;
Said divider resistance R6 connects with divider resistance R3, divider resistance R4 successively; The other end ground connection of said divider resistance R6; The other end of said divider resistance R4 is connected with the negative pole of said diode D4 and the common port of the negative pole of said diode D5; The common port of the positive pole of said diode D4 and the positive pole of said diode D5 is connected with an end of said inductance L 2, the said voltage output end that boosts chip SY6070; The other end of said inductance L 2 is connected with the said power input that boosts chip SY6070, and the pressure feedback port of the said chip SY6070 that boosts is connected with the common port of said divider resistance R3 and divider resistance R4.
Vehicle-mounted wide power voltage stabilizing plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9; Said electrolytic capacitor filter C6 and filter capacitor C7, electrolytic capacitor filter C9 are parallelly connected; The minus earth of the negative pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the positive pole of the positive pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9 is connected with the common port of the negative pole of said diode D4 and the negative pole of said diode D5.
Based on above-mentioned all embodiment, the operation principle of vehicle-mounted wide power voltage stabilizing plate is following:
R1=R3=1K Ω, R5=R6=1.2K Ω, R2=R4=16K Ω, C1=C2=C5=C7=0.1uF, the model of D1 is SMCJ28A, the model of D2, 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 the chip that boosts is 12V.
Power supply is connected with common mode inductance XFR4 with after filter capacitor C1 is parallelly connected again, and 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 through behind the common mode inductance XFR4, and the interchange interference meeting that comprises in the power supply is by common mode inductance XFR4 filtering, and the principle that is adopted is that common mode inductance XFR4 does not transmit alternating current.After exchange being disturbed by filtering, the input power supply Schottky diode D1 that flows through is because the characteristic of Schottky diode D1 can be with the high voltage filtering in the input power supply.After exchanging interference and high voltage interference through filtering; The processing procedure of input power supply is just for boosting or step-down; When the pressure drop of promptly importing power supply is higher than rated voltage; The pressure drop that just will import power supply by step-down chip SY8550 is reduced to rated voltage, and when the pressure drop of input power supply was lower than rated voltage, the pressure drop that just will import power supply by the chip SY6070 that boosts was elevated to rated voltage.Therefore, vehicle-mounted wide power voltage stabilizing plate can be exported stable glitch-free rated voltage.
Above-mentioned vehicle-mounted wide power voltage stabilizing plate exchanges filtering module and high voltage filtering module through connecting at power input; Make the interchange interference and the high voltage interference that in power supply, produce get into power supply voltage stabilizing plate before just by filtering; Thereby can guarantee that the unfavorable interference that in power supply, occurs can not be delivered to the load that is connected with power supply voltage stabilizing plate through the voltage stabilizing plate, and then the useful life of proof load.
A kind of navigation television set comprises above-mentioned vehicle-mounted wide power voltage stabilizing plate, the integrated circuit board spraying three anti-lacquers that the navigation television set is inner, and hardware rust prevention by applying liquid material lacquer, the screw in the navigation television set are the CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
In the present embodiment; The navigation television set is converted by general television set, the integrated circuit board spraying three anti-lacquers (waterproof, protection against the tide, antifog) that general television set is inner, inner hardware rust prevention by applying liquid material lacquer; The screw that inside is used to connect changes the screw of stainless steel into, the gold-plated processing of external interface.Main improvement is to adopt above-mentioned vehicle-mounted wide power voltage stabilizing plate.Engine of boat and ship produces big electric current in transient fluctuation and causes the electric current band to disturb and high voltage interference; These all cause damage to television set; Thereby cause common television set short the useful life on boats and ships; Therefore, change the power supply in the television set into above-mentioned vehicle-mounted wide power after, television set can adapt to the use on boats and ships.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, 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 accompanying claims.
Claims (8)
1. vehicle-mounted wide power voltage stabilizing plate; Be used for interchange interference and the high voltage of filtering circuit and export stable voltage; It is characterized in that said vehicle-mounted wide power voltage stabilizing plate comprises: be used for the interchange filtering module that interchange that the fluctuation of filtering input power supply forms disturbs, high voltage filtering module, step-down module and the boost module that is used for the said interchange filtering of filtering module negative pole input negative pulse high voltage interference;
The input of said interchange filtering module is used for being connected with power supply, and said interchange filtering module is connected with said high voltage filtering module, and said high voltage filtering module is connected with said step-down module, and said step-down module is connected with said boost module.
2. vehicle-mounted wide power voltage stabilizing plate according to claim 1; It is characterized in that said interchange filtering module is common mode inductance XFR4, said high voltage filtering module is a Schottky diode; Said step-down module is step-down chip SY8550, and said boost module is the chip SY6070 that boosts;
Said common mode inductance XFR4 comprises positive signal input, negative signal input, positive signal output and negative signal output;
Said step-down chip SY8550 comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The said chip SY6070 that boosts comprises power input, Enable Pin, pressure feedback port, voltage output end and earth terminal;
The positive signal input of said common mode inductance XFR4 is used for being connected with positive source; The negative signal input of said common mode inductance XFR4 is used for being connected with power cathode; The positive signal output of said common mode inductance XFR4 is connected with the negative pole of said Schottky diode, and the negative signal output of said common mode inductance XFR4 is connected with the positive pole of said Schottky diode;
The positive signal output of said common mode inductance XFR4 is connected with the power input of said step-down chip SY8550; The Enable Pin of said step-down chip SY8550 and earth terminal ground connection; The pressure feedback port input reference voltage of said step-down chip SY8550, the voltage output end of said step-down chip SY8550 is connected with the said power input that boosts chip SY6070;
The Enable Pin of the said chip SY6070 that boosts and earth terminal ground connection, the pressure feedback port input reference voltage of the said chip SY6070 that boosts, the voltage output end output burning voltage of the said chip SY6070 that boosts.
3. vehicle-mounted wide power voltage stabilizing plate according to claim 2; It is characterized in that; Said interchange filtering module also comprises filter capacitor C1; The positive pole of said filter capacitor C1 is connected with the positive signal input of said common mode inductance XFR4, and the negative pole of said filter capacitor C1 is connected with the negative signal input of said common mode inductance XFR4.
4. vehicle-mounted wide power voltage stabilizing plate according to claim 2; It is characterized in that; Said high voltage filtering module also comprises filter capacitor C2 and electrolytic capacitor filter C3; Said filter capacitor C2 is parallelly connected with said Schottky diode, and the positive pole of said electrolytic capacitor filter C3 is connected with the negative pole of said Schottky diode, and the negative pole of said electrolytic capacitor filter C3 is connected with the positive pole of said Schottky diode.
5. vehicle-mounted wide power voltage stabilizing plate according to claim 2 is characterized in that said step-down module also comprises divider resistance R1, divider resistance R2, divider resistance R5, diode D2, diode D3 and inductance L 1;
Said divider resistance R5 connects with divider resistance R1, divider resistance R2 successively; The other end ground connection of said divider resistance R5; One end of the said inductance L 1 of the other end of said divider resistance R2 connects; Said divider resistance R2 is connected with the described power input that boosts chip SY6070 with the common port of said inductance L 1; The other end of said inductance L 1 is connected with the voltage output end of said step-down chip SY8550, and the pressure feedback port of said step-down chip SY8550 is connected with the common port of said divider resistance R1 and divider resistance R2;
The positive pole of said diode D2 is connected with the positive pole of said diode D3; The negative pole of said diode D2 is connected with the negative pole of said diode D3; The positive pole of said diode D2 is connected the common end grounding of the negative pole of the negative pole of said diode D2 and said diode D3 with the anodal common port of said diode D3 with the voltage output end of said step-down chip SY8550.
6. vehicle-mounted wide power voltage stabilizing plate according to claim 2; It is characterized in that said 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;
Said electrolytic capacitor filter C4 and filter capacitor C5, electrolytic capacitor filter C6 are parallelly connected; The negative pole of said electrolytic capacitor filter C4; The end of filter capacitor C5, the minus earth of electrolytic capacitor filter C6; The positive pole of said electrolytic capacitor filter C4, the positive pole of the other end of filter capacitor C5, electrolytic capacitor filter C6 is connected with the said power input that boosts chip SY6070;
Said divider resistance R6 connects with divider resistance R3, divider resistance R4 successively; The other end ground connection of said divider resistance R6; The other end of said divider resistance R4 is connected with the negative pole of said diode D4 and the common port of the negative pole of said diode D5; The common port of the positive pole of said diode D4 and the positive pole of said diode D5 is connected with an end of said inductance L 2, the said voltage output end that boosts chip SY6070; The other end of said inductance L 2 is connected with the said power input that boosts chip SY6070, and the pressure feedback port of the said chip SY6070 that boosts is connected with the common port of said divider resistance R3 and divider resistance R4.
7. vehicle-mounted wide power voltage stabilizing plate according to claim 6; It is characterized in that; Said vehicle-mounted wide power voltage stabilizing plate also comprises electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9; Said electrolytic capacitor filter C6 and filter capacitor C7, electrolytic capacitor filter C9 are parallelly connected; The minus earth of the negative pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9, the positive pole of the positive pole of said electrolytic capacitor filter C6, filter capacitor C7, electrolytic capacitor filter C9 is connected with the common port of the negative pole of said diode D4 and the negative pole of said diode D5.
8. navigation television set; It is characterized in that, comprise any described vehicle-mounted wide power voltage stabilizing plate of aforesaid right requirement 1-7, the integrated circuit board spraying three anti-lacquers that said navigation television set is inner; Hardware rust prevention by applying liquid material lacquer, the screw in the said navigation television set are the CARBURIZING FURNACE FOR STAINLESS FASTENER nail.
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| CN101577484A (en) * | 2008-05-08 | 2009-11-11 | 海尔集团公司 | Power supply device of switch power supply of external convertible frequency air conditioner |
| CN201726313U (en) * | 2010-06-02 | 2011-01-26 | 青岛海信电器股份有限公司 | Voltage-boosting circuit and liquid crystal driving circuit with the same |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968566A (en) * | 2017-12-20 | 2018-04-27 | 上海艾为电子技术股份有限公司 | A kind of power-switching circuit |
| CN107968566B (en) * | 2017-12-20 | 2020-04-07 | 上海艾为电子技术股份有限公司 | Power supply conversion circuit |
| US10756615B2 (en) | 2017-12-20 | 2020-08-25 | Shanghai Awinic Technology Co., LTD | Power supply conversion circuit |
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| CN102723858B (en) | 2015-04-08 |
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