CN104333238A - Power supply circuit for navigation device - Google Patents
Power supply circuit for navigation device Download PDFInfo
- Publication number
- CN104333238A CN104333238A CN201410552049.8A CN201410552049A CN104333238A CN 104333238 A CN104333238 A CN 104333238A CN 201410552049 A CN201410552049 A CN 201410552049A CN 104333238 A CN104333238 A CN 104333238A
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- Prior art keywords
- electric capacity
- resistance
- inductance
- conversion chip
- ground connection
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
Abstract
The invention discloses a power supply circuit for a navigation device. The power supply circuit comprises a power supply conversion chip, a voltage stabilizer U, field effect transistors Q20 and Q23 and triodes Q2 and Q19. According to the power supply circuit for the navigation device, through an energy storage inductor, a power conversion chip U4, the field effect tubes and the triodes, the function of voltage conversion can be realized, and stable voltage can be obtained. The current structure is simple, the cost is low, and the stability is high.
Description
Technical field
The present invention relates to a kind of power circuit for omniselector.
Background technology
Along with the development of automotive engineering, the use of Navigation Display Unit is more and more universal, and driver is also more and more stronger to the dependence of Navigation Display Unit when driving.Generally speaking, existing Navigation Display Unit is all adopt the display screen of large-screen to show to the instruction of road, and driver completes multiple manipulation by operating display.Corresponding, for providing the support circuit of working power generally to adopt the power supply chip of specialty to realize for whole Navigation Display Unit, its complex structure, cost are higher, and stability is not also high especially.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: provide that a kind of structure is simple, cost is lower and the power circuit for omniselector that stability is higher.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of power circuit for omniselector, comprise power conversion chip, pressurizer U, field-effect transistor Q20, Q23 and triode Q2, Q19; Wherein:
The voltage input end of described power conversion chip is connected with battery BATT by inductance L 20, the Enable Pin of described power conversion chip connects DVD_CTRL port by resistance R55, node between described resistance R55 and Enable Pin also passes through resistance R49 ground connection, the slow turn-on end ground connection of described power conversion chip; The flash end of described power conversion chip is connected with start end by electric capacity C37, and described flash end is also connected with the negative electrode of diode D7, and the described anode of diode D7 is connected with the earth terminal of power conversion chip, and described earth terminal is direct ground connection also;
Node between the flash end PH of described power conversion chip U4 and the negative electrode of diode D7 is also sequentially connected with the reversion pin VSNS of power conversion chip U4 by inductance L 5, resistance R38, R39.The amplification pin COMP of described power conversion chip U4 is successively by electric capacity C48 and resistance R4 ground connection, and described amplification pin COMP is also directly by electric capacity C34 ground connection.Node between described resistance R39 and reversion pin VSNS is by resistance R40 ground connection;
Described inductance L 5 and the node between resistance R38 are also direct to be connected with the input of+5V voltage and pressurizer, the input of described pressurizer is connected with the earth terminal of pressurizer U133 by electric capacity C368, described earth terminal is direct ground connection also, the output head grounding of described pressurizer, also for output voltage S3V3, described inductance L 5 is connected with the source electrode of field effect transistor Q20 with the node between resistance R38 is also direct, the grid of described field effect transistor Q20 is connected with source electrode by resistance R5, drain electrode is connected with voltage end M5V5 by inductance L 2, the grid of described field effect transistor Q20 is also connected with the collector electrode of triode Q2 by resistance R195, the grounded emitter of described triode Q2, base stage connects DVD_ON port, described inductance L 5 is also directly connected with voltage end MD5V by inductance L 6 with the node between resistance R38, described inductance L 5 is connected with the source electrode of field effect transistor Q23 with the node between resistance R38 is also direct, and the grid of described field effect transistor Q23 is connected with source electrode by resistance R114, drains to be connected with voltage end D5V, also passes through inductance L 7 and is connected with voltage end TFT5V.The grid of described field effect transistor Q23 is also connected with the collector electrode of triode Q19 by resistance R129, and the emitter base of described triode Q19, base stage is connected with POWER_C1 port.
Further, also comprise electric capacity C70, the node between the voltage input end of described power conversion chip and inductance L 20 is by electric capacity C70 ground connection.
Further, also comprise electric capacity C40, described electric capacity C40 and electric capacity C70 is connected in parallel.
Further, also comprise electric capacity C63, described electric capacity C63 and electric capacity C70 is connected in parallel.
Further, also comprise electric capacity C41, the slow turn-on end of described power conversion chip is by electric capacity C41 ground connection.
Further, also comprise electric capacity C44, the node between described inductance L 5 and resistance R38 is by electric capacity C44 ground connection.
Further, also comprise electric capacity C42, described electric capacity C42 and electric capacity C44 is connected in parallel.
Further, also comprise electric capacity C38, described electric capacity C38 and electric capacity C44 is connected in parallel.
Further, also comprise electric capacity C39, described electric capacity C39 and electric capacity C44 is connected in parallel.
The above-mentioned power circuit for omniselector can realize the function of voltage transformation by energy storage inductor, power conversion chip U4, field effect transistor and triode, and the voltage obtained is comparatively stable.Above-mentioned circuit configuration is simple, cost is lower and stability is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of the control circuit that the electric current of the present invention to AC power supply device gathers.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
First, before embodiment is described, be necessary that some terms to occurring make an explanation herein.Such as:
Use the term such as " first ", " second " to describe various element if occur herein, but these elements should not limited by these terms.These terms are only used for differentiation element and another element.Therefore, " first " element also can be called as " second " element and not depart from instruction of the present invention.
In addition, should be understood that, when mentioning an element " connection " or " connection " to another element, it can directly connect or directly be connected to another element or also can there is intermediary element.On the contrary, when mentioning that an element " directly connection " or " directly connecting " are to another element, then there is not intermediary element.
The various terms occurred in this article are only not intended to as limitation of the invention for describing the object of concrete execution mode.Unless context is clearly pointed out in addition, then singulative intention also comprises plural form.
" comprise " when using term in this manual and/or " including " time, these terms specify the existence of described feature, entirety, step, operation, element and/or parts, but also do not get rid of more than one other features, entirety, step, operation, element, the existence of parts and/or its group and/or additional.
About embodiment:
Refer to Fig. 1, the better embodiment that the present invention is used for the power circuit of omniselector comprises power conversion chip U4, pressurizer U133, field-effect transistor Q20, Q23 and triode Q2, Q19.
The voltage input end VIN of described power conversion chip U4 is connected with battery BATT by inductance L 20, and the node between described voltage input end VIN and inductance L 20 is also by electric capacity C70 ground connection, and described electric capacity C70 is also connected in parallel with electric capacity C40 and C63.The Enable Pin EN of described power conversion chip U4 connects DVD_CTRL port by resistance R55, and the node between described resistance R55 and Enable Pin EN is also by resistance R49 ground connection.The slow turn-on end SS of described power conversion chip U4 is by electric capacity C41 ground connection.
The flash end PH of described power conversion chip U4 is connected with start end BOOT by electric capacity C37, described flash end PH is also connected with the negative electrode of diode D7, the anode of described diode D7 is connected with the earth terminal GND of power conversion chip U4, and described earth terminal GND is direct ground connection also.
Node between the flash end PH of described power conversion chip U4 and the negative electrode of diode D7 is also sequentially connected with the reversion pin VSNS of power conversion chip U4 by inductance L 5, resistance R38, R39.The amplification pin COMP of described power conversion chip U4 is successively by electric capacity C48 and resistance R4 ground connection, and described amplification pin COMP is also directly by electric capacity C34 ground connection.Node between described resistance R39 and reversion pin VSNS is by resistance R40 ground connection.
Node between described inductance L 5 and resistance R38 is successively by electric capacity C39 and resistance R58 ground connection, and described electric capacity C39 and electric capacity C44, C42, C38 are connected in parallel.Node ground connection between described electric capacity C39 and resistance R58.
Described inductance L 5 and the node between resistance R38 are also direct to be connected with the input IN of+5V voltage and pressurizer U133.The input IN of described pressurizer U133 is connected with the earth terminal GND of pressurizer U133 by electric capacity C368, and described earth terminal GND is direct ground connection also.The output OUT0 of described pressurizer U133 passes through electric capacity C369 ground connection, also for output voltage S3V3.Described electric capacity C369 is also connected in parallel with electric capacity EC5.
Described inductance L 5 is connected with the source electrode of field effect transistor Q20 with the node between resistance R38 is also direct, and the grid of described field effect transistor Q20 is connected with source electrode by resistance R5, drains to be connected with voltage end M5V5 by inductance L 2.The grid of described field effect transistor Q20 is also connected with the collector electrode of triode Q2 by resistance R195, and the grounded emitter of described triode Q2, base stage connects DVD_ON port.
Described inductance L 5 is also directly connected with voltage end MD5V by inductance L 6 with the node between resistance R38.
Described inductance L 5 is connected with the source electrode of field effect transistor Q23 with the node between resistance R38 is also direct, and the grid of described field effect transistor Q23 is connected with source electrode by resistance R114, drains to be connected with voltage end D5V, also passes through inductance L 7 and is connected with voltage end TFT5V.The grid of described field effect transistor Q23 is also connected with the collector electrode of triode Q19 by resistance R129, and the emitter base of described triode Q19, base stage is connected with POWER_C1 port.
The above-mentioned power circuit for omniselector can realize the function of voltage transformation by energy storage inductor, power conversion chip U4, field effect transistor and triode, and the voltage obtained is comparatively stable.Above-mentioned circuit configuration is simple, cost is lower and stability is higher.
These are only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. for a power circuit for omniselector, it is characterized in that: the described power circuit for omniselector comprises power conversion chip, pressurizer U, field-effect transistor Q20, Q23 and triode Q2, Q19; Wherein:
The voltage input end of described power conversion chip is connected with battery BATT by inductance L 20, the Enable Pin of described power conversion chip connects DVD_CTRL port by resistance R55, node between described resistance R55 and Enable Pin also passes through resistance R49 ground connection, the slow turn-on end ground connection of described power conversion chip; The flash end of described power conversion chip is connected with start end by electric capacity C37, and described flash end is also connected with the negative electrode of diode D7, and the described anode of diode D7 is connected with the earth terminal of power conversion chip, and described earth terminal is direct ground connection also;
Node between the flash end PH of described power conversion chip U4 and the negative electrode of diode D7 is also sequentially connected with the reversion pin VSNS of power conversion chip U4 by inductance L 5, resistance R38, R39;
The amplification pin COMP of described power conversion chip U4 is successively by electric capacity C48 and resistance R4 ground connection, and described amplification pin COMP is also directly by electric capacity C34 ground connection;
Node between described resistance R39 and reversion pin VSNS is by resistance R40 ground connection;
Described inductance L 5 and the node between resistance R38 are also direct to be connected with the input of+5V voltage and pressurizer, the input of described pressurizer is connected with the earth terminal of pressurizer U133 by electric capacity C368, described earth terminal is direct ground connection also, the output head grounding of described pressurizer, also for output voltage S3V3, described inductance L 5 is connected with the source electrode of field effect transistor Q20 with the node between resistance R38 is also direct, the grid of described field effect transistor Q20 is connected with source electrode by resistance R5, drain electrode is connected with voltage end M5V5 by inductance L 2, the grid of described field effect transistor Q20 is also connected with the collector electrode of triode Q2 by resistance R195, the grounded emitter of described triode Q2, base stage connects DVD_ON port, described inductance L 5 is also directly connected with voltage end MD5V by inductance L 6 with the node between resistance R38, described inductance L 5 is connected with the source electrode of field effect transistor Q23 with the node between resistance R38 is also direct, and the grid of described field effect transistor Q23 is connected with source electrode by resistance R114, drains to be connected with voltage end D5V, also passes through inductance L 7 and is connected with voltage end TFT5V,
The grid of described field effect transistor Q23 is also connected with the collector electrode of triode Q19 by resistance R129, and the emitter base of described triode Q19, base stage is connected with POWER_C1 port.
2. as claimed in claim 1 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C70, the node between the voltage input end of described power conversion chip and inductance L 20 is by electric capacity C70 ground connection.
3., as claimed in claim 2 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C40, described electric capacity C40 and electric capacity C70 is connected in parallel.
4., as claimed in claim 2 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C63, described electric capacity C63 and electric capacity C70 is connected in parallel.
5. as claimed in claim 1 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C41, the slow turn-on end of described power conversion chip is by electric capacity C41 ground connection.
6. as claimed in claim 1 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C44, the node between described inductance L 5 and resistance R38 is by electric capacity C44 ground connection.
7., as claimed in claim 6 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C42, described electric capacity C42 and electric capacity C44 is connected in parallel.
8., as claimed in claim 6 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C38, described electric capacity C38 and electric capacity C44 is connected in parallel.
9., as claimed in claim 6 for the power circuit of omniselector, it is characterized in that: also comprise electric capacity C39, described electric capacity C39 and electric capacity C44 is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552049.8A CN104333238A (en) | 2014-10-17 | 2014-10-17 | Power supply circuit for navigation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552049.8A CN104333238A (en) | 2014-10-17 | 2014-10-17 | Power supply circuit for navigation device |
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| Publication Number | Publication Date |
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| CN104333238A true CN104333238A (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410552049.8A Pending CN104333238A (en) | 2014-10-17 | 2014-10-17 | Power supply circuit for navigation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104333238A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105207475A (en) * | 2015-10-21 | 2015-12-30 | 重庆金宏汽车电子有限公司 | Power circuit of automobile remote control device |
| CN105305821A (en) * | 2015-10-21 | 2016-02-03 | 重庆金宏汽车电子有限公司 | Power supply circuit of GPS navigation system |
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