CN202586476U - Hand-operated multi-functional mobile phone charging circuit - Google Patents
Hand-operated multi-functional mobile phone charging circuit Download PDFInfo
- Publication number
- CN202586476U CN202586476U CN2012202336140U CN201220233614U CN202586476U CN 202586476 U CN202586476 U CN 202586476U CN 2012202336140 U CN2012202336140 U CN 2012202336140U CN 201220233614 U CN201220233614 U CN 201220233614U CN 202586476 U CN202586476 U CN 202586476U
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- operational amplifier
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- mobile phone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a hand-operated multi-functional mobile phone charging circuit. The hand-operated multi-functional mobile phone charging circuit comprises a voltage reduction chip and a voltage stabilization chip, wherein a feedback end of the voltage reduction chip is connected with a third diode and an adjusting end of a first potentiometer through a fifth resistor, one end of the first potentiometer is in grounding connection, the other end of the potentiometer is respectively connected with an inductor, a fifth capacitor, a sixth capacitor and one end of a third capacitor, the other end of the inductor is connected with an output end of the voltage reduction chip and a fourth diode, the third capacitor is connected with a reverse-phase input end of a second operational amplifier through a third resistor, an in-phase input end of the second operational amplifier is connected with an output end of a sixth resistor and an in-phase input end of a first operational amplifier through the sixth resistor, an reverse-phase input end of a first operational amplifier is connected with an adjusting end of a second potentiometer, and an output end of the first operational amplifier is connected with a positive electrode end of a third diode through a twelfth resistor and a positive electrode end of a second luminous diode through a fourth resistor. The hand-operated multi-functional mobile phone charging circuit is stable and convenient in charging, safe and reliable.
Description
Technical field
The utility model relates to a kind of circuit structure, and especially a kind of hand multipurpose mobile phone charging circuit belongs to the technical field of power electronics.
Background technology
Current, along with the development of telecommunications industry, mobile phone is popularized gradually, brings great convenience for people's live and work.But mobile phone in use for some time, because the consumption of electric energy just need be charged to it; And at present mostly need convert the 220V alternating current to lithium battery can receive in the mobile phone 5V direct current with transformer to the charging of mobile phone, when just defining cell-phone charging, this need just can carry out at certain fixed-site.But for the people of some frequent business trip and tourism, this charging modes can bring a lot of inconvenience.
Summary of the invention
The purpose of the utility model is to overcome the deficiency that exists in the prior art, and a kind of hand multipurpose mobile phone charging circuit is provided, its compact conformation, and charging is stable convenient, and wide accommodation is safe and reliable.
The technical scheme that provides according to the utility model; Said hand multipurpose mobile phone charging circuit; Comprise the step-down chip; The power input of said step-down chip links to each other with the power input of voltage stabilizing chip, and the power input of step-down chip links to each other the equal ground connection of the earth terminal of step-down chip and switch terminals through first electric capacity with the earth terminal of step-down chip; The two ends of first electric capacity are parallel with the 4th electric capacity; The feedback end of step-down chip links to each other with the 3rd diode cathode end; And link to each other with the adjustable side of first potentiometer through the 5th resistance; One end ground connection of first potentiometer; The other end links to each other with an end of inductance, the 5th electric capacity, the 6th electric capacity and the 3rd electric capacity respectively, and the other end of inductance links to each other the anode tap ground connection of the 4th diode with the output of step-down chip and the cathode terminal of the 4th diode; The equal ground connection of the other end of the other end of the 5th electric capacity and the 6th electric capacity; The other end of the 3rd electric capacity passes through the 8th grounding through resistance, and links to each other with the inverting input of second operational amplifier through the 3rd resistance; The two ends of the 3rd electric capacity are parallel with the 14 resistance and the 15 resistance respectively; The two ends of the 8th resistance are parallel with the 13 resistance; The in-phase input end of second operational amplifier is through second grounding through resistance; And link to each other with the output of second operational amplifier and the in-phase input end of first operational amplifier through the 6th resistance; The inverting input of first operational amplifier links to each other with the adjustable side of second potentiometer; One end of second potentiometer is through the 11 grounding through resistance, and the other end of second potentiometer links to each other with the output of voltage stabilizing chip through the tenth resistance; The negative power end ground connection of first operational amplifier, the positive power source terminal of first operational amplifier links to each other with the output of voltage stabilizing chip; The output of first operational amplifier links to each other with the anode tap of the 3rd diode through the 12 resistance, and links to each other the cathode terminal ground connection of second light-emitting diode with the anode tap of second light-emitting diode through the 4th resistance; The earth terminal ground connection of voltage stabilizing chip, and the earth terminal of voltage stabilizing chip links to each other with the output of voltage stabilizing chip through second electric capacity.
The output of said voltage stabilizing chip links to each other the cathode terminal ground connection of first diode through first resistance with the anode tap of first light-emitting diode.The two ends of said the 3rd electric capacity are provided with charging inlet.Said charging inlet comprises the USB charging inlet.Said step-down chip adopts the LM2576 chip.Said voltage stabilizing chip adopts the U1117 chip.The power input of said step-down chip interconnects the back with the power input of voltage stabilizing chip and links to each other the other end ground connection of power input interface with an end of power input interface.Said power input interface links to each other with hand generator.Said first operational amplifier and second operational amplifier all adopt the LM358 chip.
The advantage of the utility model: unsettled current calibration is become adjustable stable electric current, and the luminance of the control second light-emitting diode D2 after the charging back is sampled relatively through operational amplifier is can indicate charged state; Avoid not influencing normal daily life system, both can also can be lithium cell charging for mobile phone directly charges because mobile phone does not have electricity, compact conformation, charging is stable convenient, and wide accommodation is safe and reliable.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with concrete accompanying drawing and embodiment the utility model is described further.
As shown in Figure 1: in order can conveniently to charge to mobile phone, the utility model adopts hand generator output electric energy; Simultaneously; In order to make the electric energy of hand generator output can reliablely and stablely satisfy charging requirement; The utility model comprises the step-down chip, and the power input of said step-down chip links to each other with the power input of voltage stabilizing chip, wherein; Adopt LM2576 with the step-down chip among the utility model embodiment, it is that example is explained that the voltage stabilizing chip adopts U1117.The power input of said step-down chip interconnects the back with the power input of voltage stabilizing chip and links to each other the other end ground connection of power input interface IN with the end of power input interface IN; Link to each other with the output of hand generator through power input interface IN, the electric energy of hand generator output is through step-down chip LM2576 step-down, and exports the voltage of 5V through voltage stabilizing chip U1117, so that the operating voltage in the charging circuit to be provided.
The power input of step-down chip LM2576 links to each other the earth terminal GND of step-down chip LM2576 and the equal ground connection of switch terminals ON/OFF through first capacitor C 1 respectively with the earth terminal GND of step-down chip; The two ends of first capacitor C 1 are parallel with the 4th capacitor C 4; The feedback end of step-down chip LM2576 links to each other with the 3rd diode D3 cathode terminal; And link to each other with the adjustable side of the first potentiometer R7 through the 5th resistance R 5; The end ground connection of the first potentiometer R7; The other end links to each other with an end of inductance L 1, the 5th capacitor C 5, the 6th capacitor C 6 and the 3rd capacitor C 3 respectively, and the other end of inductance L 1 links to each other the anode tap ground connection of the 4th diode D4 with the output of step-down chip LM2576 and the cathode terminal of the 4th diode D4; The equal ground connection of the other end of the other end of the 5th capacitor C 5 and the 6th capacitor C 6; The other end of the 3rd capacitor C 3 passes through the 8th resistance R 8 ground connection, and links to each other with the inverting input of the second operational amplifier U2B through the 3rd resistance R 3; The two ends of the 3rd capacitor C 3 are parallel with the 14 resistance R 14 and the 15 resistance R 15 respectively; The two ends of the 8th resistance R 8 are parallel with the 13 resistance R 13; The 3rd capacitor C 3 two ends form the charging output voltage with voltage after the 14 resistance R the 14, the 15 resistance R 15 is parallelly connected, and said charging output voltage links to each other with charging inlet OUT, and said charging inlet OUT can adopt other general charging inlets that comprise that USB is interior.
The in-phase input end of the second operational amplifier U2B is through second resistance R, 2 ground connection; And link to each other with the output of the second operational amplifier U2B and the in-phase input end of the first operational amplifier U2A through the 6th resistance R 6; The inverting input of the first operational amplifier U2A links to each other with the adjustable side of the second potentiometer R9; The end of the second potentiometer R9 is through the 11 resistance R 11 ground connection, and the other end of the second potentiometer R9 links to each other with the output of voltage stabilizing chip through the tenth resistance R 10; The negative power end ground connection of the first operational amplifier U2A, the positive power source terminal of the first operational amplifier U2A links to each other with the output of voltage stabilizing chip; The output of the first operational amplifier U2A links to each other with the anode tap of the 3rd diode D3 through the 12 resistance R 12, and links to each other the cathode terminal ground connection of the second light-emitting diode D2 with the anode tap of the second light-emitting diode D2 through the 4th resistance R 4; The first operational amplifier U2A and the second operational amplifier U2B all adopt LM358; The earth terminal GND ground connection of voltage stabilizing chip U1117, and the earth terminal GND of voltage stabilizing chip links to each other with the output of voltage stabilizing chip through second capacitor C 2.
In order to indicate charged state, the output of said voltage stabilizing chip links to each other the cathode terminal ground connection of the first diode D1 through first resistance R 1 with the anode tap of the first light-emitting diode D1.
During work, produce the above voltage of 6v through hand generator, the electric energy of hand generator output after step-down chip LM2576 internal conversion, obtains voltage Vref=1.23v through the power input Vin+ that power input interface IN inserts step-down chip LM2576; Said voltage is exported through the output of step-down chip LM2576, and obtains Vout=Vref (1+R7/R5) at charging inlet OUT, therefore; Through regulating the resistance of the first potentiometer R7; Can obtain different output voltage values, usually, the voltage difference that the magnitude of voltage of input step-down chip LM2576 and charging inlet OUT obtain is greater than 1.5V; Through regulating the first potentiometer R7, can obtain output voltage 4.2v among the utility model embodiment.
When charging through charging inlet OUT, through the second operational amplifier U2B amplification of taking a sample, output current produces voltage drop on the 8th resistance R 8 and the 13 resistance R 13, and realizes voltage amplification through the second operational amplifier U2B; The second operational amplifier U2B outputs to the in-phase input end of the first operational amplifier U2A with the voltage that amplifies, and the reference voltage of the inverting input of the first operational amplifier U2A can be regulated through the second potentiometer R9; Amplifying voltage after the first operational amplifier U2A samples the second operational amplifier U2B compares with the reference voltage through the second potentiometer R9; If the in-phase input end voltage of the first operational amplifier U1A is greater than the voltage of its inverting input, the first operational amplifier U2A exports high level; When first operational amplifier U2A output high level, the second light-emitting diode D2 lights, and prompting is full of; When if the in-phase input end voltage of the first operational amplifier U1A is lower than the voltage of inverting input of the first operational amplifier U1A, the first operational amplifier U1A output low level, this moment, the second light-emitting diode D2 did not work.
Simultaneously, the first operational amplifier U1A forms voltage follower, and the output of the first operational amplifier U1A is exported the voltage V of the first operational amplifier U1A inverting input
Ref2Thereby, obtain electric current I=V
Ref2/ R12.When the reference voltage of the first operational amplifier U1A inverting input is constant; Thereby electric current is constant; And the reference voltage of the first operational amplifier U1A inverting input is controlled by the second potentiometer R9, accepts second potentiometer R9 control between electric current thereby also let, and is constant adjustable.
The effect of voltage stabilizing chip U1117 be with stabilized input voltage at 5v, the input of the voltage of hand generator output input voltage stabilizing chip U1117 is through after the voltage stabilizing; Output 5V voltage is first light-emitting diode D1 power supply, and prompting is in charging; Simultaneously; The output of voltage stabilizing chip U117 is received the homophase power end of the first operational amplifier U2A, is that the first operational amplifier U2A supplies power, and lets the first operational amplifier U2A realize above-mentioned constant current function.
The utility model becomes adjustable stable electric current with unsettled current calibration, and the luminance of the control second light-emitting diode D2 after the charging back is sampled relatively through operational amplifier is can indicate charged state; Can help some to be away from home, the mobile phone electric weight is not enough, but does not have people that the place can charge promptly to charge for the mobile phone of oneself; Avoid not influencing normal daily life system, both can directly charge (through the usb interface), also can be lithium cell charging for mobile phone because mobile phone does not have electricity; Compact conformation; Charging is stable convenient, and wide accommodation is safe and reliable.
Claims (9)
1. hand multipurpose mobile phone charging circuit; It is characterized in that: comprise the step-down chip; The power input of said step-down chip links to each other with the power input of voltage stabilizing chip; The power input of step-down chip links to each other earth terminal of step-down chip (GND) and the equal ground connection of switch terminals through first electric capacity (C1) with the earth terminal (GND) of step-down chip; The two ends of first electric capacity (C1) are parallel with the 4th electric capacity (C4); The feedback end of step-down chip links to each other with the 3rd diode (D3) cathode terminal; And link to each other with the adjustable side of first potentiometer (R7) through the 5th resistance (R5); One end ground connection of first potentiometer (R7); The other end links to each other with an end of inductance (L1), the 5th electric capacity (C5), the 6th electric capacity (C6) and the 3rd electric capacity (C3) respectively; The other end of inductance (L1) links to each other the anode tap ground connection of the 4th diode (D4) with the cathode terminal of the output of step-down chip and the 4th diode (D4); The equal ground connection of the other end of the other end of the 5th electric capacity (C5) and the 6th electric capacity (C6); The other end of the 3rd electric capacity (C3) passes through the 8th resistance (R8) ground connection, and links to each other with the inverting input of second operational amplifier (U2B) through the 3rd resistance (R3); The two ends of the 3rd electric capacity (C3) are parallel with the 14 resistance (R14) and the 15 resistance (R15) respectively; The two ends of the 8th resistance (R8) are parallel with the 13 resistance (R13); The in-phase input end of second operational amplifier (U2B) is through second resistance (R2) ground connection; And link to each other with the output of second operational amplifier (U2B) and the in-phase input end of first operational amplifier (U2A) through the 6th resistance (R6); The inverting input of first operational amplifier (U2A) links to each other with the adjustable side of second potentiometer (R9); One end of second potentiometer (R9) is through the 11 resistance (R11) ground connection, and the other end of second potentiometer (R9) links to each other with the output of voltage stabilizing chip through the tenth resistance (R10); The negative power end ground connection of first operational amplifier (U2A), the positive power source terminal of first operational amplifier (U2A) links to each other with the output of voltage stabilizing chip; The output of first operational amplifier (U2A) links to each other with the anode tap of the 3rd diode (D3) through the 12 resistance (R12); And link to each other the cathode terminal ground connection of second light-emitting diode (D2) with the anode tap of second light-emitting diode (D2) through the 4th resistance (R4); The earth terminal of voltage stabilizing chip (GND) ground connection, and the earth terminal of voltage stabilizing chip (GND) links to each other with the output of voltage stabilizing chip through second electric capacity (C2).
2. hand multipurpose mobile phone charging circuit according to claim 1 is characterized in that: the output of said voltage stabilizing chip links to each other the cathode terminal ground connection of first diode (D1) through first resistance (R1) with the anode tap of first light-emitting diode (D1).
3. hand multipurpose mobile phone charging circuit according to claim 1 is characterized in that: the two ends of said the 3rd electric capacity (C3) are provided with charging inlet (OUT).
4. hand multipurpose mobile phone charging circuit according to claim 3 is characterized in that: said charging inlet (OUT) comprises the USB charging inlet.
5. hand multipurpose mobile phone charging circuit according to claim 1 is characterized in that: said step-down chip adopts the LM2576 chip.
6. hand multipurpose mobile phone charging circuit according to claim 1 is characterized in that: said voltage stabilizing chip adopts the U1117 chip.
7. hand multipurpose mobile phone charging circuit according to claim 1; It is characterized in that: the power input of said step-down chip interconnects the back with the power input of voltage stabilizing chip and links to each other the other end ground connection of power input interface (IN) with an end of power input interface (IN).
8. hand multipurpose mobile phone charging circuit according to claim 5 is characterized in that: said power input interface (IN) links to each other with hand generator.
9. hand multipurpose mobile phone charging circuit according to claim 1 is characterized in that: said first operational amplifier (U2A) and second operational amplifier (U2B) all adopt the LM358 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202336140U CN202586476U (en) | 2012-05-22 | 2012-05-22 | Hand-operated multi-functional mobile phone charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202336140U CN202586476U (en) | 2012-05-22 | 2012-05-22 | Hand-operated multi-functional mobile phone charging circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202586476U true CN202586476U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202336140U Withdrawn - After Issue CN202586476U (en) | 2012-05-22 | 2012-05-22 | Hand-operated multi-functional mobile phone charging circuit |
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| Country | Link |
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| CN (1) | CN202586476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102655345A (en) * | 2012-05-22 | 2012-09-05 | 江南大学 | Hand-cranking multipurpose mobile phone charging circuit |
-
2012
- 2012-05-22 CN CN2012202336140U patent/CN202586476U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102655345A (en) * | 2012-05-22 | 2012-09-05 | 江南大学 | Hand-cranking multipurpose mobile phone charging circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20140101 |
|
| RGAV | Abandon patent right to avoid regrant |