CN203456886U - Vehicle-mounted charging adapter applicable to mobile phones and tablet computers - Google Patents
Vehicle-mounted charging adapter applicable to mobile phones and tablet computers Download PDFInfo
- Publication number
- CN203456886U CN203456886U CN201320349400.4U CN201320349400U CN203456886U CN 203456886 U CN203456886 U CN 203456886U CN 201320349400 U CN201320349400 U CN 201320349400U CN 203456886 U CN203456886 U CN 203456886U
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Abstract
The utility model relates to a vehicle-mounted charging adapter applicable to mobile phones and tablet computers. The use of the existing vehicle-mounted chargers can not meet the demands of various handheld terminal devices by people. The vehicle-mounted charging adapter applicable to mobile phones and tablet computers comprises a shell, a positive electrode, negative electrodes, a clamping piece, a USB output interface, an indicating lamp and a circuit board, wherein the positive electrode is arranged at the top end of the shell, the side faces of the top end are provided with the negative electrodes and the clamping piece, the bottom part is provided with the USB output interface and the indicating lamp, and the inner part is provided with the circuit board; the USB output interface is a dual-output interface; and the circuit in the circuit board comprises a pre-filter circuit, an efficient switching circuit, a current compensation circuit, a pulse width modulation control circuit, an output control circuit and an output over-voltage protection circuit. The vehicle-mounted charging adapter applicable to mobile phones and tablet computers has the advantages that influences on current limiting accuracy caused by the generated current limiting value change and spike interference when output levels change can be made up, the size is small, the output current is large, the efficiency is high, the design is reasonable, the performances are stable, and the operation and the use are convenient and simple.
Description
Technical field
The utility model relates to electronic applications, is specifically related to a kind of vehicle-mounted charge adapter that applies to mobile phone and panel computer.
Background technology
Various vehicle-mounted reduction voltage circuit schemes all exist performance unreliable on the market at present, and efficiency is low, and caloric value is large, can not export and maybe can not hold continue output 3.1A or above large electric current.Along with the quickening of work and rhythm of life, car owners are more and more, and people have the time greatly to spend onboard every day, and current onboard charger on the market cannot meet the normal use of people's various hand-held terminal devices.
Utility model content
The purpose of this utility model be to provide a kind of safe and reliable, power is large, efficiency is high, temperature rise is low, meet vehicle carried mobile phone and the panel computer charging adapter of environmental protection concept.
The utility model consists of housing, positive electrode, negative electrode, clamping sheet, USB output interface, indicator light and circuit board, housing top is provided with positive electrode, side, housing top is provided with negative electrode and clamping sheet, housing bottom is provided with USB output interface and indicator light, and enclosure interior is provided with circuit board.
USB output interface is dual output interface.
Circuit on the utility model circuit board consists of pre-filtering circuit, efficient switch circuit, current compensation circuit, control circuit for pulse-width modulation, output control circuit and output overvoltage protection circuit; the electric current of direct current 9.6～30V is through pre-filtering circuit filtering; again through efficient switch circuit; connect pulse-width modulation circuit; control circuit for pulse-width modulation in succession respectively current compensation circuit and output voltage controlling circuit and output overvoltage protection circuit, provide desired power supply to the service of connection devices.
Control circuit for pulse-width modulation core is MP2905EK chip, efficient switch circuit core is S14618DY-T1-E3 chip, 10 pin series capacitance C3 of MP2905EK chip connect 8 pin of S14618DY-T1-E3 chip, 7,6,5 tripods of the series connection S14618DY-T1-E3 chip of MP2905EK chip; 3 pin series connection C6 of MP2905EK chip connect 2,3 pin of S14618DY-T1-E3 chip; 8 pin of MP2905EK chip connect 1 pin of S14618DY-T1-E3 chip; 5 pin of MP2905EK chip connect 4 pin of S14618DY-T1-E3 chip etc.
Control circuit for pulse-width modulation in circuit of the present utility model has directly been used MP2905EK chip as core, and 10 pin of its MP2905EK chip connecting respectively R3 and R17, and direct ground connection after R17 series connection, form current limliting and current compensation circuit then.
The utility model has the advantage of that circuit design is scientific and reasonable, the spike that can make up the variation of the cut-off current producing when output level changes and cause disturbs the impact on the accuracy of current limliting, and volume is little, output current is large, efficiency is high, reasonable in design, stable performance, easy for operation simple.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is circuit block diagram of the present utility model;
Fig. 3 is circuit theory diagrams of the present utility model.
In figure, 1 is housing, the 2nd, and positive electrode, the 3rd, negative electrode; the 4th, clamping sheet; the 5th, USB output interface, the 6th, indicator light, the 7th, circuit board; the 8th, pre-filtering circuit; the 9th, efficient switch circuit, the 10th, current compensation circuit, the 11st, control circuit for pulse-width modulation; the 12nd, output control circuit, the 13rd, output overvoltage protection circuit.
Embodiment
Below in conjunction with accompanying drawing, with most preferred embodiment, the utility model is described in further details;
The utility model consists of housing (1), positive electrode (2), negative electrode (3), clamping sheet (4), USB output interface (5), indicator light (6) and circuit board (7), housing (1) top is provided with positive electrode (2), housing (1) side, top is provided with negative electrode (3) and clamping sheet (4), housing (1) bottom is provided with USB output interface (5) and indicator light (6), and housing (1) inside is provided with circuit board (7).
USB output interface (5) is dual output interface.
Circuit on the utility model circuit board (7) is by pre-filtering circuit (8), efficient switch circuit (9), current compensation circuit (10), control circuit for pulse-width modulation (11), output control circuit (12) and output overvoltage protection circuit (13) form, the electric current of direct current 9.6～30V is through pre-filtering circuit (8) filtering, again through efficient switch circuit (9), connect pulse-width modulation circuit (11), control circuit for pulse-width modulation (11) in succession respectively current compensation circuit (10) and output voltage controlling circuit (12) and output overvoltage protection circuit (13), to the service of connection devices, provide desired power supply.
Control circuit for pulse-width modulation (11) core is MP2905EK chip, efficient switch circuit (9) core is SI4618DY-T1-E3 chip, 10 pin series capacitance C3 of MP2905EK chip connect 8 pin of SI4618DY-T1-E3 chip, 7,6,5 tripods of the series connection SI4618DY-T1-E3 chip of MP2905EK chip; 3 pin series connection C6 of MP2905EK chip connect 2,3 pin of S14618DY-T1-E3 chip; 8 pin of MP2905EK chip connect 1 pin of SI4618DY-T1-E3 chip; 5 pin of MP2905EK chip connect 4 pin of SI4618DY-T1-E3 chip etc.
Control circuit for pulse-width modulation in circuit of the present utility model (11) has directly been used MP2905EK chip as core, 10 pin of its MP2905EK chip connecting respectively R3 and R17, and after R17 series connection, direct ground connection, forms current limliting and current compensation circuit (10) then.
Claims (5)
1. a vehicle-mounted charge adapter that applies to mobile phone and panel computer, it is characterized in that it consists of housing (1), positive electrode (2), negative electrode (3), clamping sheet (4), USB output interface (5), indicator light (6) and circuit board (7), housing (1) top is provided with positive electrode (2), housing (1) side, top is provided with negative electrode (3) and clamping sheet (4), housing (1) bottom is provided with USB output interface (5) and indicator light (6), and housing (1) inside is provided with circuit board (7).
2. a kind of vehicle-mounted charge adapter that applies to mobile phone and panel computer as claimed in claim 1, circuit on circuit board (7) described in it is characterized in that is by pre-filtering circuit (8), efficient switch circuit (9), current compensation circuit (10), control circuit for pulse-width modulation (11), output control circuit (12) and output overvoltage protection circuit (13) form, the electric current of direct current 9.6～30V is through pre-filtering circuit (8) filtering, again through efficient switch circuit (9), connect pulse-width modulation circuit (11), control circuit for pulse-width modulation (11) in succession respectively current compensation circuit (10) and output voltage controlling circuit (12) and output overvoltage protection circuit (13), to the service of connection devices, provide desired power supply.
3. a kind of vehicle-mounted charge adapter that applies to mobile phone and panel computer as claimed in claim 2, is characterized in that described control circuit for pulse-width modulation (11) core is MP2905EK chip.
4. a kind of vehicle-mounted charge adapter that applies to mobile phone and panel computer as claimed in claim 2, is characterized in that described efficient switch circuit (9) core is S14618DY-T1-E3 chip.
5. a kind of vehicle-mounted charge adapter that applies to mobile phone and panel computer as claimed in claim 1, is characterized in that described USB output interface (5) is dual output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320349400.4U CN203456886U (en) | 2013-06-13 | 2013-06-13 | Vehicle-mounted charging adapter applicable to mobile phones and tablet computers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320349400.4U CN203456886U (en) | 2013-06-13 | 2013-06-13 | Vehicle-mounted charging adapter applicable to mobile phones and tablet computers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203456886U true CN203456886U (en) | 2014-02-26 |
Family
ID=50136738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320349400.4U Expired - Fee Related CN203456886U (en) | 2013-06-13 | 2013-06-13 | Vehicle-mounted charging adapter applicable to mobile phones and tablet computers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203456886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646631A (en) * | 2018-06-12 | 2018-10-12 | 方碧水 | A kind of vehicle-mounted charge connector |
-
2013
- 2013-06-13 CN CN201320349400.4U patent/CN203456886U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646631A (en) * | 2018-06-12 | 2018-10-12 | 方碧水 | A kind of vehicle-mounted charge connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20140613 |
|
| EXPY | Termination of patent right or utility model |