CN206041575U - Charging circuit of mobile terminal power supply - Google Patents
Charging circuit of mobile terminal power supply Download PDFInfo
- Publication number
- CN206041575U CN206041575U CN201621050322.8U CN201621050322U CN206041575U CN 206041575 U CN206041575 U CN 206041575U CN 201621050322 U CN201621050322 U CN 201621050322U CN 206041575 U CN206041575 U CN 206041575U
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- Prior art keywords
- mobile terminal
- circuit
- powered
- boost module
- charging circuit
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Abstract
The utility model discloses a charging circuit of mobile terminal power supply, including power identification circuit, resistance amplification simulator and the compound boost module who is used for judging the mobile terminal type, power identification circuit, resistance amplification simulator and compound boost module electricity in proper order connect, the power identification circuit is used for control the resistance amplification simulator, compound boost module is including being used for control compound boost module output current's current detection resistance, the resistance amplification simulator is used for adjusting the size of current detection resistance. The portable electronic equipment such as cell -phone, flat board that can follow personal indispensability gets to deal with the condition that special emergency can't find the power.
Description
Technical field
This utility model is related to field of power supplies, more particularly to charging circuit.
Background technology
The portable electric appts such as mobile phone, flat board, portable power source are that we carry with, and can provide setting for electric energy
It is standby.And the popularization of OTG functions causes the portable electric appts such as mobile phone, flat board to realize the function of supplying power for outside, to our life
Work work brings and more may and facilitate.It is existing by portable electric appts supplying power for outside mostly without buck
Process, limited to portable electric appts supplying power for outside purposes.
Utility model content
The purpose of this utility model is to provide the charging circuit that a kind of mobile terminal is powered, can be from carry-on indispensable handss
The portable electric appts power taking such as machine, flat board, to tackle the situation that special emergency situation can not find power supply.Shifting of the present utility model
The charging circuit that dynamic terminal is powered is used to the super capacitor module charging energy-storing of high-power output, although mobile terminal is
Low-power is exported, but the charging circuit powered through mobile terminal described in the utility model boosts, and changes energy storage with the time, just
Some applications can be done using the moment output power of super capacitor, the characteristics of discharge capability is strong.
The purpose of this utility model employs the following technical solutions realization：
The charging circuit that a kind of mobile terminal is powered, including for judging power supply identification circuit, the electricity of mobile terminal style
Simulator and compound boost module are amplified in resistance, and the power supply identification circuit, resistance amplification simulator and compound boost module are successively
Electrical connection, the power supply identification circuit are used for controlling the resistance amplification simulator, and the compound boost module is included for controlling
The current sense resistor of the compound boost module output current is made, the resistance amplifies simulator and is used for adjusting the electric current inspection
The size of measuring resistance.
Preferably, the compound boost module also includes reduction voltage circuit.
Preferably, the resistance amplifies simulator includes audion and resistor voltage divider circuit.
Preferably, the compound boost module also includes that booster type integrated circuit and N-channel MOS FET are managed.
Preferably, booster type integrated circuit of the compound boost module also including built-in N-channel MOS FET pipes.
Preferably, the power supply identification circuit includes voltage comparator circuit, and the voltage comparator circuit includes operation amplifier
Device.
Preferably, the power supply identification circuit includes MCU and a/d converter
Preferably, the booster type integrated circuit is CN3300 chips.
Preferably, also include for making the stable manostat of mobile terminal voltage x current.Compared to existing technology, this practicality is new
The beneficial effect of type is：Can be from portable electric appts power takings such as carry-on indispensable mobile phone, flat boards, to tackle special emergency
Situation can not find the situation of power supply.
Description of the drawings
Fig. 1 is the charging circuit that the mobile terminal that this utility model embodiment is provided is powered.
Description of symbols：10th, power supply identification circuit；20th, it is combined boost module；30th, manostat.
Specific embodiment
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of description, and in order to allow above and other purpose of the present utility model, feature
Can become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
The charging circuit that mobile terminal as shown in Figure 1 is powered, input are JP1, and outfan is B+ and B-；Mobile terminal
The charging circuit of power supply includes amplifying simulator and compound liter for the power supply identification circuit 10, resistance for judging mobile terminal style
Die block 20, wherein resistance amplify simulator includes audion Q2 and resistor voltage divider circuit, and resistor voltage divider circuit includes R2 and R5.
Power supply identification circuit 10 is used for controlling resistance amplification simulator, and compound boost module 20 is included for controlling compound boost module 20
The current sense resistor R1 of output current, resistance amplify simulator and are used for adjusting the size of current sense resistor R1.
Power supply identification circuit 10 may determine that input voltage VIN+size, it is main to judge more than or less than 4.2V：If
Input voltage VIN+be more than 4.2V, then it is assumed that what VIN+ connected is the mobile terminal of 5V interfaces (such as Android mobile phone, USB interface
Equipment) or portable power source；If input voltage VIN+be less than 4.2V, then it is assumed that the movement for being less than 4.2V interfaces of VIN+ connections
Terminal (such as i Phone, exports 3.7V).
In the present embodiment, power supply identification circuit 10 includes voltage comparator circuit, and voltage comparator circuit is with operational amplifier
U3 is core parts, and the reference voltage of operational amplifier U3 is 2V, with reference voltage after input voltage VIN+Jing R7 and R11 partial pressures
Relatively.If input voltage VIN+be less than 4.2V, the outfan OUT control resistance of operational amplifier U3 amplifies in simulator three
Pole pipe Q2 is turned on, and resistor voltage divider circuit R2 and R5 comes into force；If input voltage VIN+be more than 4.2V, the output of operational amplifier U3
The audion Q2 that end OUT control resistance amplifies in simulator is closed, and resistor voltage divider circuit R2 and R5 does not work.In another enforcement
In example, power supply identification circuit 10 includes MCU and a/d converter, and a/d converter is counted to Jing MCU after input voltage VIN+analog digital conversion
Calculate, there can be more voltage swing types；Corresponding, resistance amplifies simulator can more parallel branches, each
Road all includes audion and resistant series, and wherein audion is also by MCU controls, therefore resistance amplification simulator has different partial pressures
Effect, the Simulation scale-up effect to current sense resistor R1 are also more various.
Because mobile terminal exports restricted to docking port, such as i Phone voltage 3.7V, electric current 0.3A, Android mobile phone electricity
Pressure 5V, electric current 1-2A, portable power source are similar with Android mobile phone.Therefore, will foundation when being powered using external equipment by using mobile terminal
Different mobile terminals is limited to the output voltage output current for being combined boost module 20.
20 prior art of compound boost module has various implementations, such as by the booster type of built-in N-channel MOS FET pipes
Integrated circuit is realized.Typically, boost module 20 is combined in the present embodiment adopt booster type battery charge control integrated circuit
CN3300 is realized and is improved.CN3300 is a booster type battery charge control integrated circuit for working in 4V to 28V.
CN3300 has been internally integrated reference voltage source ,+5V voltage modulated units, inductive current detector unit, battery voltage detection circuit
It is with the outer N-channel MOS FET drive circuits of piece etc., few with outer member, the advantages of circuit is simple.When input power is connected,
CN3300 enters charged state, and the outer N-channel MOS FET conductings of control sheet, inductive current rise, and when rising to, foreign current detection is electric
During the upper limit that resistance is arranged, the outer N-channel MOS FET cut-offs of piece, inductive current decline, and the energy transfer in inductance is in battery.Work as electricity
When inducing current drops to the lower limit of foreign current detection resistance setting, the outer N-channel MOS FET of piece is turned on again, is so circulated.
Compound boost module 20 include current sense resistor R1, CN3300 be by monitor inductive current (input current) and
Control charging current, so charging current can be changed with the change of input voltage and cell voltage.CN3300 passes through
The size of resistance Rcss of the current sense resistor R1 Jing after resistance amplification simulator partial pressure is equivalent arranges inductive current scope.
When outside N-channel MOS FET is turned on, input power charges to inductance L3, and inductive current rises, and works as inductive current
Rise to (representative value)：
ILhigh=0.15V/Rcs
Outside N-channel MOS FET cut-off, inductive current begin to decline, the energy transfer in inductance to output capacitance and battery
In.
When inductive current drops to (representative value)：
ILlow=0.12V/Rcs
Outside N-channel MOS FET is turned on again, starts the new cycle.
So, inductance average current is：IL=0.135V/RCS
For i Phone voltage 3.7V, inductance average current can be 0.3A, and Android mobile phone can be 1-2A, mobile electric
Source is similar with Android mobile phone.
Compound boost module 20 also includes reduction voltage circuit, and reduction voltage circuit includes electric capacity C1 and inductance L1.If no blood pressure lowering
Circuit, when the equipment voltage very little that external standby charges, is combined the output voltage of boost module 20 directly to the electricity to very little
Electricity is pressed, circuit board or damage equipment can be burnt.
Further, the charging circuit that mobile terminal is powered also is included for making the stable manostat of mobile terminal voltage x current
30, it is ensured that the voltage x current of mobile terminal is not in too big fluctuations compromise equipment.
For a person skilled in the art, technical scheme that can be as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to this utility model claim
Within the scope of shield.
Claims (9)
1. the charging circuit that a kind of mobile terminal is powered, it is characterised in that：Know including the power supply for judging mobile terminal style
Other circuit, resistance amplify simulator and compound boost module, and the power supply identification circuit, resistance amplify simulator and compound boosting
Module is sequentially connected electrically, and the power supply identification circuit is used for controlling the resistance amplification simulator, the compound boost module bag
The current sense resistor for controlling the compound boost module output current is included, the resistance amplifies simulator and is used for adjusting institute
State the size of current sense resistor.
2. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The compound boost module is also wrapped
Include reduction voltage circuit.
3. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The resistance amplifies simulator bag
Include audion and resistor voltage divider circuit.
4. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The compound boost module is also wrapped
Include booster type integrated circuit and N-channel MOS FET pipes.
5. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The compound boost module is also wrapped
Include the booster type integrated circuit of built-in N-channel MOS FET pipes.
6. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The power supply identification circuit includes
Voltage comparator circuit, the voltage comparator circuit include operational amplifier.
7. the charging circuit that mobile terminal as claimed in claim 1 is powered, it is characterised in that：The power supply identification circuit includes
MCU and a/d converter.
8. the charging circuit that mobile terminal as claimed in claim 4 is powered, it is characterised in that：The booster type integrated circuit is
CN3300 chips.
9. the charging circuit that the mobile terminal as any one of claim 1-8 is powered, it is characterised in that：Also include for
Make the stable manostat of mobile terminal voltage x current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050322.8U CN206041575U (en) | 2016-09-12 | 2016-09-12 | Charging circuit of mobile terminal power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050322.8U CN206041575U (en) | 2016-09-12 | 2016-09-12 | Charging circuit of mobile terminal power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206041575U true CN206041575U (en) | 2017-03-22 |
Family
ID=58298310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621050322.8U Active CN206041575U (en) | 2016-09-12 | 2016-09-12 | Charging circuit of mobile terminal power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206041575U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342617A (en) * | 2017-08-31 | 2017-11-10 | 芮巍强 | Electricity-fetching module and the electricity getting device containing it |
-
2016
- 2016-09-12 CN CN201621050322.8U patent/CN206041575U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342617A (en) * | 2017-08-31 | 2017-11-10 | 芮巍强 | Electricity-fetching module and the electricity getting device containing it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |