CN103001290A - Self-adaption charging circuit and corresponding mobile terminal - Google Patents
Self-adaption charging circuit and corresponding mobile terminal Download PDFInfo
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- CN103001290A CN103001290A CN2012105016558A CN201210501655A CN103001290A CN 103001290 A CN103001290 A CN 103001290A CN 2012105016558 A CN2012105016558 A CN 2012105016558A CN 201210501655 A CN201210501655 A CN 201210501655A CN 103001290 A CN103001290 A CN 103001290A
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Abstract
The invention discloses a self-adaption charging circuit and a corresponding mobile terminal. The self-adaption charging circuit comprises a current limiting module, a voltage detection module and a charging circuit. The current limiting module is used for adjusting input current from an initial input current limit value so as to obtain the adjusted input current. The voltage detection module is used for detecting charging input voltage and comparing the charging input voltage with a preset voltage maintenance value so as to generate corresponding comparison results, and the current limiting module is used for adjusting the input current according to the comparison results so as to obtain the adjusted input current. The charging circuit is used for charging a chargeable element in the mobile terminal according to the adjusted input current. The self-adaption charging circuit and the corresponding mobile terminal can be matched with charging devices of various types and are wide in applied range.
Description
Technical field
The present invention relates to the charging technique field, particularly relate to self adaptation charging circuit and corresponding portable terminal.
Background technology
Along with constantly weeding out the old and bring forth the new of portable terminal product, its function is more and more, and from strength to strength, therefore also more and more higher to the designing requirement of product.Power supply is the important part in the portable terminal product, usually, all contains chargeable battery in the portable terminal as its power supply, and therefore, it is more and more important that charging technique also seems for portable terminal, and the innovation of charging technique is also more and more faster.
In common design, the design of charger is fairly simple comparatively speaking, generally is the charger of every kind of mobile terminal configuration special use, thereby and most portable terminal special-purpose charging inlet can be set to be connected charging with the charger of special use.But, along with the function of present portable terminal is more and more, from strength to strength, present portable terminal often needs more electric weight, so battery is also increasing, and it generally need to charge with the quick charge technology, and the quick charge technology must use large electric current to charge.On the other hand, for the convenience on using, charging inlet is more and more standardization also, more and more simplifies.A lot of portable terminals has brought into use USB interface as charging inlet at present.But, because common employing is large current charge when charging, for example adopt the charger of 2A to charge, if the charging current of portable terminal is designed to 2A, and USB interface is not supported so large charging current, when therefore utilizing USB interface that portable terminal is charged, USB interface is damaged easily.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of self adaptation charging circuit and corresponding portable terminal, and it can mate various types of charging devices, and the scope of application is wider.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of self adaptation charging circuit is provided, and it comprises current limit module, voltage detection module and charging circuit.Input current after described current limit module is used for beginning input current adjustment obtained to adjust from initial input current limits value.Described voltage detection module is used for detecting charging input voltage and described charging input voltage is compared to produce corresponding comparative result with default voltage value of keeping, wherein, when described comparative result represents described charging input voltage greater than described voltage value of keeping, then notify described current limit module that present input current is increased after the first current marching technique value as present input current; And when described comparative result represents described charging input voltage less than described voltage value of keeping, then notify described current limit module that present input current is reduced the second current marching technique value with as present input current, thereby until the present input current in the described current limit module reach the input current after requirement obtains described adjustment.The input current of described charging circuit after according to described adjustment charges to the rechargeable elements in the portable terminal.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of portable terminal is provided, and it comprises the self adaptation charging circuit.Described self adaptation charging circuit comprises current limit module, voltage detection module and charging circuit.Input current after described current limit module is used for beginning input current adjustment obtained to adjust from initial input current limits value.Described voltage detection module is used for detecting charging input voltage and described charging input voltage is compared to produce corresponding comparative result with default voltage value of keeping, wherein, when described comparative result represents described charging input voltage greater than described voltage value of keeping, then notify described current limit module that present input current is increased after the first current marching technique value as present input current; And when described comparative result represents described charging input voltage less than described voltage value of keeping, then notify described current limit module that present input current is reduced the second current marching technique value with as present input current, thereby until the present input current in the described current limit module reach the input current after requirement obtains described adjustment.The input current of described charging circuit after according to described adjustment charges to the rechargeable elements in the portable terminal.
Wherein, described current limit module further receives maximum input current limits value, when in case described present input current reaches described maximum input current limits value, with the input current of described maximum input current limits value after as described adjustment, thereby avoid the input current after the described adjustment to surpass described maximum input current limits value.
Wherein, described self adaptation charging circuit further comprises register, and it is used for storing described voltage value of keeping, described maximum input current limits value and described initial input current limits value.
Wherein, described self adaptation charging circuit further comprises I
2The C controller, its microcontroller that is used for described self adaptation charging circuit and described portable terminal carries out communication.Wherein, described microcontroller passes through described I with described voltage value of keeping, described maximum input current limits value and described initial input current limits value
2C controller and writing in the described register
Wherein, described the first current marching technique value is identical with described the second current marching technique value.
Wherein, described self adaptation charging circuit is incorporated in the described portable terminal.
The invention has the beneficial effects as follows: be different from the situation of prior art, self adaptation charging circuit of the present invention can be adjusted input current automatically, thereby mates various types of charging devices, can not cause input current excessive and damage the problem of charging device.Therefore self adaptation charging circuit of the present invention and the corresponding portable terminal scope of application are wider, more can cater to actual demand.
Description of drawings
Fig. 1 is that Fig. 1 is the schematic diagram of the self adaptation charging circuit shown in the embodiment of the invention; With
Fig. 2 is the schematic diagram of the operation principle of self adaptation charging circuit shown in Figure 1.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, self adaptation charging circuit and its embodiment of corresponding portable terminal, method, step, structure, feature and effect thereof to foundation the present invention proposes are described in detail as follows.
Relevant aforementioned and other technology contents of the present invention, Characteristic can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, the present invention is limited.
Fig. 1 is the schematic diagram of the self adaptation charging circuit shown in the embodiment of the invention.Personal adaptation charging circuit of the present invention can the various charging currents of self adaptation, so that adopt USB interface no matter be, for example, USB interface on the computer, still use the charger of large electric current, can charge to portable terminal normally, thereby so that the time can better carry out more flexibly product design in design, it is also more convenient to use.
As shown in Figure 1, the self adaptation charging circuit 100 of the embodiment of the invention comprises current limit module 110, voltage detection module 120, charging circuit 130, register 140 and I
2C controller 150.
Wherein, the input current after current limit module 110 is used for beginning input current adjustment obtained to adjust from initial input current limits value.Wherein initial input current limits value can be pre-stored in register 140, obtains initial input current limits value thereby current limit module 110 connects register 140.
Compare with voltage value of keeping of presetting and produce corresponding comparative result thereby voltage detection module 120 is used for detecting charging input voltage and the input voltage that will charge, then export comparative result to current limit module 110 so that current limit module 110 is adjusted input current according to comparative result.
Particularly, the comparative result that produces when voltage detection module 120 represents to charge input voltage during greater than the voltage value of keeping, and then current limit module 110 increases after the first current marching technique value present input current as present input current.At this, because input current increases, then near the voltage drop the charge port increases, the charging input voltage that voltage detection module 120 is detected correspondingly reduces, subsequently, voltage detection module 120 continues more present charging input voltage and the voltage value of keeping, thereby produces corresponding comparative result, the like.
Otherwise the comparative result that produces when voltage detection module 120 represents to charge input voltage during less than the voltage value of keeping, and then current limit module 110 reduces after the second current marching technique value present input current as present input current.At this, because input current reduces, then near the voltage drop the charge port reduces, the charging input voltage that voltage detection module 120 is detected correspondingly increases, then, voltage detection module 120 continues more present charging input voltage and the voltage value of keeping, thereby produces corresponding comparative result, the like.
That is to say, the comparative result that current limit module 110 can be constantly produces according to voltage detection module 120 and input current is adjusted, until input current reaches requirement, thus the input current after obtaining to adjust.It will be appreciated by persons skilled in the art that the first current marching technique value and the second current marching technique value can set identically, then current limit module 110 can constantly raise or reduce input current with a certain particular value, thus the input current after obtaining to adjust.In addition, the precision of voltage detection module 120 can design according to actual needs, at this, can be 0.1V with the accuracy Design of voltage detection module 120.And the precision of current limit module 110 also can design according to actual needs, at this, can be 100mA with the accuracy Design of current limit module 110.
In addition, current limit module 110 also can further receive maximum input current limits value from register 140, when 110 pairs of input currents of current limit module are adjusted, in case input current reaches maximum input current limits value, then current limit module 110 no longer increases input current, as the input current after adjusting, surpass maximum input current limits value with the input current after avoiding adjusting with maximum input current limits value.
Then, the input current after current limit module 110 will be adjusted exports charging circuit 130 to, and charging circuit 130 can be according to the input current after adjusting to the rechargeable elements in the portable terminal, and for example battery etc. charges.In the present embodiment, charging circuit 130 can be common normal charge circuit.
I
2The microcontroller (Micro Control Unit, MCU) that C controller 150 is used for self adaptation charging circuit 100 and portable terminal carries out communication, so the microcontroller in the portable terminal can pass through I
2C controller 150 and register 140 is write all kinds of parameters, for example the voltage value of keeping, maximum input current limits value and initial input current limits value etc.Certainly, the microcontroller in the portable terminal also can pass through I
2150 pairs of registers of C controller 140 carry out read operation, thereby read the state of the self adaptation charging circuit 100 of record in the register 140.
Below will introduce particularly the operation principle of the self adaptation charging circuit of the embodiment of the invention.Fig. 2 is the schematic diagram of the operation principle of self adaptation charging circuit shown in Figure 1.
As shown in Figure 2, portable terminal 200 comprises microcontroller 210 and charging detecting module 220.Wherein, charging detecting module 220 in the portable terminal 200 can be detected the type of the charging device 300 that whether charging device 300 insertions is arranged and insert, then, microcontroller 210 in the portable terminal 200 can calculate self adaptation charging circuit 100 needed all kinds of parameters according to the type of the charging device 300 that inserts and the needs of itself, for example the voltage value of keeping, maximum input current limits value and initial input current limits value etc.
Then, microcontroller 210 with all kinds of parameters by the I in the self adaptation charging circuit 100
2 C controller 150 and writing in the register 140 so that self adaptation charging circuit 100 can normally work, obtains the input current after the adjustment and utilizes input current after adjusting to the rechargeable elements in the portable terminal 200, and for example battery etc. charges.
For example, portable terminal 200 is at the charger of when design its coupling 1.5A, so the maximum input current limits value that portable terminal 200 writes in the self adaptation charging circuit 100 is 1.5A, and the voltage value of keeping is 4.8V.
When charging device 300 is the charger of 1.5A of matches criteria, and insert portable terminal 200 and when portable terminal 200 charged, current limit module 110 in the self adaptation charging circuit 100 can be from initial current limit value, and for example 100mA begins to carry out adjusting operation as input current.That is to say that current limit module 110 initial input currents are 100mA, at this moment, because input current 100mA is smaller, so near the voltage drop the charge port is smaller, and the charging input voltage is larger, greater than the voltage value of keeping 4.8V.Therefore, current limit module 110 increases a current marching technique value with present input current 100mA, suppose that the current marching technique value is 100mA, so that input current has reached 200mA, near the charge port voltage drop increases, the charging input voltage correspondingly reduces, and voltage detection module 120 is judged the size of charging input voltage and the voltage value of keeping again, adjusts again.Successively circulation until the input current that current limit module 110 arranges reaches 1.5A,, is charged as the input current after adjusting normally with the input current of 1.5A.
When charging device 300 is the USB interface of computer; because USB interface can only provide the charging current of 500mA; then the microcontroller in the portable terminal 200 220 can reset self adaptation charging circuit 100 needed all kinds of parameters according to the difference of charging device 300; for example; when current limit module 110 is adjusted to 600mA with input voltage; then near the voltage drop the charge port is larger; the charging input voltage will be less than the present voltage value of keeping 4.8V; then current limit module 110 can correspondingly be adjusted to 500mA with input current, avoids damaging with the protection USB interface.
When charging device 300 is the charger of 2A, because being provided with maximum input current limits value in the self adaptation charging circuit 100 is 1.5A, therefore after self adaptation charging circuit 100 is adjusted to 1.5A with input current, because the restriction of maximum input current value 1.5A, it can not adjust input current again, but with the input current of 1.5A as the input current after adjusting, charge, thereby guaranteed the fail safe of whole product.
The self adaptation charging circuit 100 that it will be appreciated by persons skilled in the art that the embodiment of the invention can be incorporated in the portable terminal, thereby makes portable terminal can utilize the self adaptation charging circuit and be fit to use various types of charging devices that it is charged.Certainly, the self adaptation charging circuit of the embodiment of the invention also can be designed as independently product, and it cooperates portable terminal, charging device and uses.
In sum, the self adaptation charging circuit of the embodiment of the invention can be adjusted input current automatically, thereby mates various types of charging devices, can not cause input current excessive and damage the problem of charging device.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a self adaptation charging circuit is characterized in that, comprising:
The current limit module, the input current after being used for beginning input current adjustment obtained to adjust from initial input current limits value;
Voltage detection module, be used for detecting charging input voltage and described charging input voltage is compared to produce corresponding comparative result with default voltage value of keeping, wherein, when described comparative result represents described charging input voltage greater than described voltage value of keeping, then notify described current limit module that present input current is increased after the first current marching technique value as present input current; And when described comparative result represents described charging input voltage less than described voltage value of keeping, then notify described current limit module that present input current is reduced the second current marching technique value with as present input current, thereby until the present input current in the described current limit module reaches the input current after requirement obtains described adjustment; With
Charging circuit charges to the rechargeable elements in the portable terminal according to the input current after the described adjustment.
2. self adaptation charging circuit according to claim 1, it is characterized in that, described current limit module further receives maximum input current limits value, when in case described present input current reaches described maximum input current limits value, with the input current of described maximum input current limits value after as described adjustment, thereby avoid the input current after the described adjustment to surpass described maximum input current limits value.
3. self adaptation charging circuit according to claim 2 is characterized in that, further comprises:
Register is used for storing described voltage value of keeping, described maximum input current limits value and described initial input current limits value.
4. self adaptation charging circuit according to claim 3 is characterized in that, further comprises:
I
2The C controller, the microcontroller that is used for described self adaptation charging circuit and described portable terminal carries out communication, and wherein, described microcontroller passes through described I with described voltage value of keeping, described maximum input current limits value and described initial input current limits value
2C controller and writing in the described register.
5. each described self adaptation charging circuit in 4 according to claim 1 is characterized in that described the first current marching technique value is identical with described the second current marching technique value.
6. self adaptation charging circuit according to claim 1 is characterized in that, described self adaptation charging circuit is incorporated in the described portable terminal.
7. a portable terminal is characterized in that, comprising:
The self adaptation charging circuit, it comprises:
The current limit module, the input current after being used for beginning input current adjustment obtained to adjust from initial input current limits value;
Voltage detection module, be used for detecting charging input voltage and described charging input voltage is compared to produce corresponding comparative result with default voltage value of keeping, wherein, when described comparative result represents described charging input voltage greater than described voltage value of keeping, then notify described current limit module that present input current is increased by the first current marching technique value with as present input current; And when described comparative result represents described charging input voltage less than described voltage value of keeping, then notify described current limit module that present input current is reduced the second current marching technique value with as present input current, thereby until the present input current in the described current limit module reaches the input current after requirement obtains described adjustment; With
Charging circuit charges to the chargeable device in the portable terminal according to the input current after the described adjustment.
8. portable terminal according to claim 7, it is characterized in that, described current limit module further receives maximum input current limits value, when in case described present input current reaches described maximum input current limits value, with the input current of described maximum input current limits value after as described adjustment, thereby avoid the input current after the described adjustment to surpass described maximum input current limits value.
9. portable terminal according to claim 8 is characterized in that, described self adaptation charging circuit further comprises:
Register is used for storing described voltage value of keeping, described maximum input current limits value and described initial input current limits value.
10. portable terminal according to claim 9 is characterized in that, described portable terminal further comprises microcontroller, and described self adaptation charging circuit further comprises I
2The C controller is so that described self adaptation charging circuit and described microcontroller carry out communication, and wherein, described microcontroller passes through described I with described voltage value of keeping, described maximum input current limits value and described initial input current limits value
2C controller and writing in the described register.
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| CN2012105016558A CN103001290A (en) | 2012-11-28 | 2012-11-28 | Self-adaption charging circuit and corresponding mobile terminal |
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| CN104617615A (en) * | 2015-01-19 | 2015-05-13 | 联想(北京)有限公司 | Charging method and electronic equipment |
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| CN107024972A (en) * | 2017-04-13 | 2017-08-08 | 维沃移动通信有限公司 | A kind of charging method and mobile terminal |
| CN104184304B (en) * | 2013-05-24 | 2017-12-26 | 联想(北京)有限公司 | A kind of method for power conversion and device |
| CN109586356A (en) * | 2018-11-01 | 2019-04-05 | Oppo广东移动通信有限公司 | Charge control method, device and computer storage medium |
| CN113991779A (en) * | 2021-10-27 | 2022-01-28 | 北京小米移动软件有限公司 | Charging method, charging device, electronic equipment and storage medium |
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Application publication date: 20130327 |