CN204597568U - A kind of cell phone charging circuit structure - Google Patents
A kind of cell phone charging circuit structure Download PDFInfo
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- CN204597568U CN204597568U CN201520314136.XU CN201520314136U CN204597568U CN 204597568 U CN204597568 U CN 204597568U CN 201520314136 U CN201520314136 U CN 201520314136U CN 204597568 U CN204597568 U CN 204597568U
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Abstract
The utility model belongs to mobile phone charging technique field, is specifically related to a kind of cell phone charging circuit structure, comprises charging chip, adjustable resistance, the first electric capacity, the first resistance, transistor and diode that model is MAX1898; Described charging chip comprises sensing detection pin, instruction pin, enable input pin, Current adjustment pin, timing pin, restarts control pin, positive pole charging pins, grounding pin, external driving pin and current sense input pin, the utility model can constant voltage export, make charger for mobile phone have smart metastable voltage to export, improve the fail safe of mobile phone charging, reduce the infringement to battery of mobile phone, the useful life of extending cell phone.
Description
Technical field
The utility model belongs to mobile phone charging technique field, is specifically related to a kind of cell phone charging circuit structure.
Background technology
In modern society, the more important role that gets up taken on by mobile phone in daily life work, and people can utilize mobile phone chats, communication, speculation in stocks, viewing video etc., and mobile phone, while greatly enriching people's life, also brings puzzlement and disturbs.If mobile phone can not use normally, the work to individual, life are caused tremendous influence by that, even cause economic loss.
Generally, mobile phone can obtain sufficient power supply supply, but cell-phone battery electric-charge quantity is limited, in daily life, the rhythm of life of people is more and more faster, and the service time of battery of mobile phone charging is not at present generally very long, and most people need once-a-day to charge to mobile phone, therefore, charger for mobile phone has just become the adapting appts that frequency of utilization is very high.
But; charger for mobile phone on market is very different; in the middle of some in rated capacity; discharge performance; there are quality problems in the aspects such as fail safe protective value, when especially these charger charging voltage adjustment degree are not high, the too high or too low charging voltage of long-term employing is charged to mobile phone; not only can affect the useful life of mobile phone, time serious, also can bring personal injury to consumer.
Utility model content
The purpose of this utility model is: for the deficiencies in the prior art, a kind of cell phone charging circuit structure is provided, makes charger for mobile phone have smart metastable voltage and export, improve the fail safe of mobile phone charging, reduce the infringement to battery of mobile phone, the useful life of extending cell phone.
To achieve these goals, the utility model adopts following technical scheme:
A kind of cell phone charging circuit structure, is characterized in that: comprise charging chip, adjustable resistance, the first electric capacity, the first resistance, transistor and diode that model is MAX1898; Described charging chip comprises sensing detection pin, instruction pin, enable input pin, Current adjustment pin, timing pin, restarts control pin, positive pole charging pins, grounding pin, external driving pin and current sense input pin;
Described sensing detection pin connects power supply, described adjustable resistance one end connects described Current adjustment pin, the other end ground connection of described adjustable resistance, the adjustable side ground connection of described adjustable resistance, one end of described first electric capacity connects described timing pin, the other end ground connection of described first electric capacity, one end of described first resistance with described restart control pin and be connected, the other end ground connection of described first resistance, described grounding pin ground connection, described external driving pin connects the base stage of described transistor, described current sense input pin connects the emitter of described transistor, the anode of described diode is connected with the collector electrode of described transistor.Regulate described adjustable resistance can control the maximum charging current of charging chip.
One as a kind of cell phone charging circuit structure of the utility model is improved, described a kind of cell phone charging circuit structure also comprises light-emitting diode, the anode of described light-emitting diode connects power supply, the negative electrode of described light-emitting diode connects described instruction pin, and described light-emitting diode is used to indicate charged state.
One as a kind of cell phone charging circuit structure of the utility model is improved; described a kind of cell phone charging circuit structure also comprises the second resistance; described light-emitting diode is connected with described instruction pin by described second resistance; described second resistance is as protective resistance; for reducing the electric current by described light-emitting diode, be not burned to protect described light-emitting diode.
One as a kind of cell phone charging circuit structure of the utility model is improved, described a kind of cell phone charging circuit structure also comprises photoelectric coupling circuit, the anode of described photoelectric coupling circuit is connected with described light-emitting diodes tube cathode, the negative electrode of described photoelectric coupling circuit is connected with described instruction pin, the grounded emitter of described photoelectric coupling circuit.
One as a kind of cell phone charging circuit structure of the utility model is improved; described a kind of cell phone charging circuit structure also comprises the 3rd resistance; one end of described 3rd resistance is connected with the collector electrode of described photoelectric coupling circuit; the other end of described 3rd resistance connects power supply; described 3rd resistance is as protective resistance; when avoiding the collector and emitter conducting of described photoelectric coupling circuit, the direct ground connection of power supply is short-circuited.
One as a kind of cell phone charging circuit structure of the utility model is improved, also comprise the 4th resistance, described 4th resistance one end connects described enable input pin, the other end ground connection of described 4th resistance, 4th resistance as pull-up resistor, to provide high level to charging chip.
One as a kind of cell phone charging circuit structure of the utility model is improved, the first jumper cap is provided with between one end of the described enable input pin of described 4th resistance connection and power supply, when using described first jumper cap, one end that described 4th resistance connects described enable input pin connects power supply simultaneously, to give described enable input pin high level.
One as a kind of cell phone charging circuit structure of the utility model is improved, and is provided with the second jumper cap between described first resistance two ends, when using described second jumper cap, described in restart and control pin ground connection, to restart described charging chip.
One as a kind of cell phone charging circuit structure of the utility model is improved, and a kind of cell phone charging circuit structure also comprises the second electric capacity, and one end of described second electric capacity is connected with described positive pole charging pins, the other end ground connection of described second electric capacity.
One as a kind of cell phone charging circuit structure of the utility model is improved, and a kind of cell phone charging circuit structure also comprises the 3rd electric capacity, and one end of described 3rd electric capacity is connected with described external driving pin, and the other end of described 3rd electric capacity connects power supply.
The beneficial effects of the utility model are: provide a kind of cell phone charging circuit structure, this cell phone charging circuit structure comprises the charging chip of model MAX1898, adjustable resistance, the first electric capacity, the first resistance, transistor and diode, can constant voltage export, make charger for mobile phone have smart metastable voltage to export, improve the fail safe of mobile phone charging, reduce the infringement to battery of mobile phone, the useful life of extending cell phone.
Accompanying drawing explanation
Fig. 1 is the structural representation of utility model.
Wherein, D13. charging chip, D13-1. sensing detection pin, D13-2. pin is indicated, D13-3. enable input pin, D13-4. Current adjustment pin, D13-5. timing pin, D13-6. control pin is restarted, D13-7. positive pole charging pins, D13-8. grounding pin, D13-9. external driving pin, D13-10. current sense input pin, R19. adjustable resistance, R24. the first resistance, R18. the second resistance, R17. the 3rd resistance, R23. the 4th resistance, C20. the first electric capacity, C21. the second electric capacity, C15. the 3rd electric capacity, Q2. transistor, D14. diode, D12. light-emitting diode, U3. photoelectric coupling circuit, JP3. the first jumper cap, JP4. the second jumper cap.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, a kind of cell phone charging circuit structure, comprise charging chip D13, adjustable resistance R19, the first electric capacity C20, the second electric capacity C21, the 3rd electric capacity C15, the first resistance R24 that model is MAX1898, the second resistance R18, the 3rd resistance R17, the 4th resistance R23, transistor Q2, diode D14, light-emitting diode D12 and photoelectric coupling circuit U3; Charging chip D13 comprises sensing detection pin D13-1, instruction pin D13-2, enable input pin D13-3, Current adjustment pin D13-4, timing pin D13-5, restarts control pin D13-6, positive pole charging pins D13-7, grounding pin D13-8, external driving pin D13-9 and current sense input pin D13-10;
Sensing detection pin D13-1 connects power supply, adjustable resistance R19 one end connects Current adjustment pin D13-4, the other end ground connection of adjustable resistance R19, the adjustable side ground connection of adjustable resistance R19, one end of first electric capacity C20 connects timing pin D13-5, the other end ground connection of the first electric capacity C20, one end of first resistance R24 controls pin D13-6 and is connected with restarting, the other end ground connection of the first resistance R24, grounding pin D13-8 ground connection, external driving pin D13-9 connects the base stage of transistor Q2, current sense input pin D13-10 connects the emitter of transistor Q2, the anode of diode D14 is connected with the collector electrode of transistor Q2, the anode of light-emitting diode D12 connects power supply, after the negative electrode of light-emitting diode D12 and the second resistance R18 contact, pin D13-2 is indicated to connect by the second resistance R18, the anode of photoelectric coupling circuit U3 is connected with light-emitting diode D12 negative electrode, the negative electrode of photoelectric coupling circuit U3 is connected with instruction pin D13-2, the grounded emitter of photoelectric coupling circuit U3, one end of 3rd resistance R17 is connected with the collector electrode of photoelectric coupling circuit U3, the other end of the 3rd resistance R17 connects power supply, 4th resistance R23 one end connects enable input pin D13-3, the other end ground connection of the 4th resistance R23, 4th resistance R23 connects between one end of enable input pin D13-3 and power supply and is provided with the first jumper cap JP3, high level is obtained with the one end enabling the 4th resistance R23 be connected with enable input pin D13-3, in addition, the second jumper cap JP4 is provided with between the two ends of the first resistance R24, the use of the second jumper cap JP can make to restart and control pin D13-6 ground connection, to restart charging chip D13, one end of second electric capacity C21 is connected with positive pole charging pins D13-7, the other end ground connection of the second electric capacity C21, one end of 3rd electric capacity C15 is connected with external driving pin D13-9, the other end of the 3rd electric capacity C15 connects power supply.
The utility model have employed the charging chip D13 that model is MAX1898, makes charger for mobile phone have smart metastable voltage and exports, improve the fail safe of mobile phone charging, reduce the infringement to battery of mobile phone, the useful life of extending cell phone.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present utility model, replacement or modification all belong to protection range of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. a cell phone charging circuit structure, is characterized in that: comprise charging chip, adjustable resistance, the first electric capacity, the first resistance, transistor and diode that model is MAX1898; Described charging chip comprises sensing detection pin, instruction pin, enable input pin, Current adjustment pin, timing pin, restarts control pin, positive pole charging pins, grounding pin, external driving pin and current sense input pin;
Described sensing detection pin connects power supply, described adjustable resistance one end connects described Current adjustment pin, the other end ground connection of described adjustable resistance, the adjustable side ground connection of described adjustable resistance, one end of described first electric capacity connects described timing pin, the other end ground connection of described first electric capacity, one end of described first resistance with described restart control pin and be connected, the other end ground connection of described first resistance, described grounding pin ground connection, described external driving pin connects the base stage of described transistor, described current sense input pin connects the emitter of described transistor, the anode of described diode is connected with the collector electrode of described transistor.
2. a kind of cell phone charging circuit structure according to claim 1, is characterized in that: also comprise light-emitting diode, and the anode of described light-emitting diode connects power supply, and the negative electrode of described light-emitting diode connects described instruction pin.
3. a kind of cell phone charging circuit structure according to claim 2, is characterized in that: also comprise the second resistance, and described light-emitting diode is connected with described instruction pin by described second resistance.
4. a kind of cell phone charging circuit structure according to claim 2, it is characterized in that: also comprise photoelectric coupling circuit, the anode of described photoelectric coupling circuit is connected with described light-emitting diodes tube cathode, the negative electrode of described photoelectric coupling circuit is connected with described instruction pin, the grounded emitter of described photoelectric coupling circuit.
5. a kind of cell phone charging circuit structure according to claim 4, is characterized in that: also comprise the 3rd resistance, one end of described 3rd resistance is connected with the collector electrode of described photoelectric coupling circuit, and the other end of described 3rd resistance connects power supply.
6. a kind of cell phone charging circuit structure according to claim 1, is characterized in that: also comprise the 4th resistance, and described 4th resistance one end connects described enable input pin, the other end ground connection of described 4th resistance.
7. a kind of cell phone charging circuit structure according to claim 6, is characterized in that: be provided with the first jumper cap between one end of the described enable input pin of described 4th resistance connection and power supply.
8. a kind of cell phone charging circuit structure according to claim 1, is characterized in that: be provided with the second jumper cap between described first resistance two ends.
9. a kind of cell phone charging circuit structure according to claim 1, is characterized in that: also comprise the second electric capacity, and one end of described second electric capacity is connected with described positive pole charging pins, the other end ground connection of described second electric capacity.
10. a kind of cell phone charging circuit structure according to claim 1, is characterized in that: also comprise the 3rd electric capacity, and one end of described 3rd electric capacity is connected with described external driving pin, and the other end of described 3rd electric capacity connects power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520314136.XU CN204597568U (en) | 2015-05-15 | 2015-05-15 | A kind of cell phone charging circuit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520314136.XU CN204597568U (en) | 2015-05-15 | 2015-05-15 | A kind of cell phone charging circuit structure |
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| CN204597568U true CN204597568U (en) | 2015-08-26 |
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| CN201520314136.XU Active CN204597568U (en) | 2015-05-15 | 2015-05-15 | A kind of cell phone charging circuit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904236A (en) * | 2021-03-23 | 2021-06-04 | 兰州资源环境职业技术学院 | Overhead line short circuit grounding fault detection sensor |
-
2015
- 2015-05-15 CN CN201520314136.XU patent/CN204597568U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904236A (en) * | 2021-03-23 | 2021-06-04 | 兰州资源环境职业技术学院 | Overhead line short circuit grounding fault detection sensor |
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