CN105552979B - A kind of method and terminal of the output current for detecting charger - Google Patents

A kind of method and terminal of the output current for detecting charger Download PDF

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Publication number
CN105552979B
CN105552979B CN201510626994.2A CN201510626994A CN105552979B CN 105552979 B CN105552979 B CN 105552979B CN 201510626994 A CN201510626994 A CN 201510626994A CN 105552979 B CN105552979 B CN 105552979B
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current
charging
charger
charging circuit
output
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CN105552979A (en
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丁兆刚
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Abstract

The embodiment of the invention discloses a kind of method and terminal of the output current for detecting charger, terminal includes the first charging circuit and the second charging circuit, the described method includes:When detecting that charger is inserted into the terminal, open first charging circuit and set the first charging current of first charging circuit, and open second charging circuit;Increase stair step current in the second currently used charging current of second charging circuit and obtain the 3rd charging current of second charging circuit;Confirm whether the output voltage of the charger under first charging current and the 3rd charging current effect drops into pre-determined lower limit voltage;Confirmed according to described as a result, determining the output current of the charger.Using the embodiment of the present invention, the output current of detection charger is coordinated by twin-channel charging circuit, the specification requirement to charging circuit and power inductance can be reduced, reduces device cost.

Description

A kind of method and terminal of the output current for detecting charger
Technical field
The present invention relates to electronic technology field, more particularly to a kind of method and terminal of the output current for detecting charger.
Background technology
For user convenience, start to relax the requirement to end product at present, be no longer limited to require user to adopt With its standard configuration dedicated charger, but bring the problem of new:The fan-out capability difference of different chargers is, it is necessary to which end product can The fan-out capability of adaptive charger, charges under conditions of the fan-out capability scope no more than charger, so as to obtain Most fast charging rate, therefore end product needs to judge the fan-out capability of charger.In the prior art scheme, software It is that the charging circuit for having the main channel in twin-channel charging circuit by possessing detects the fan-out capability of charger, because This overload capacity specification requirement to the charging circuit on main channel and power inductance is especially high, adds the cost and body of device Product, is unfavorable for the cost control of end product and the miniaturization of design.
The content of the invention
The embodiment of the present invention provides a kind of method and terminal of the output current for detecting charger.Pass through twin-channel charging Circuit coordinates the output current of detection charger, can reduce the specification requirement to charging circuit and power inductance, reduces device Cost.
An embodiment of the present invention provides a kind of method for the output current for detecting charger, including:
When detecting that charger is inserted into the terminal, open first charging circuit and set first charging First charging current of circuit, and open second charging circuit;
Increase stair step current in the second currently used charging current of second charging circuit to obtain described second and fill 3rd charging current of circuit;
Confirm the output voltage of the charger under first charging current and the 3rd charging current effect Whether pre-determined lower limit voltage is dropped into;
Confirmed according to described as a result, determining the output current of the charger.
Wherein, it is described to be confirmed according to described as a result, determining the output current of the charger includes:
If the output voltage of the charger drops into the pre-determined lower limit voltage, by first charging current and institute State output current of the sum of second charging current as the charger;
If the output voltage of the charger does not drop into pre-determined lower limit voltage, determined according to the 3rd charging current The output current of the charger.
Wherein, it is described to determine that the output current of the charger includes according to the 3rd charging current:
Judge whether the 3rd charging current reaches the overload current of first charging circuit;
If the 3rd charging current reaches the overload current of first charging circuit, described first is charged The output current of the sum of electric current and the 3rd operating current as the charger.
Wherein, it is described when detecting that charger is inserted into the terminal, open first charging circuit and set institute Before stating the first charging current of the first charging circuit, and opening second charging circuit, further include:
When detecting that charger is inserted into the terminal, second charging circuit is opened;
Increase the stair step current in the 4th currently used charging current of second charging circuit and obtain described 5th charging current of two charging circuits;
Judge whether the output voltage of the charger in the case where the 5th charging current acts on drops into described pre- set Voltage limit;
According to the judging result, the output current of the charger is determined.
Wherein, described according to the judging result, determining the output current of the charger includes:
If the output voltage of the charger drops into the pre-determined lower limit voltage, using the 4th charging current as The output current of the charger;
If the output voltage of the charger does not drop into the pre-determined lower limit voltage and the 5th charging current reaches The overload current of second charging circuit, then close second charging circuit, and performs the opening described first Charging circuit and the first charging current for setting first charging circuit, and open the operation step of second charging circuit Suddenly.
Correspondingly, an embodiment of the present invention provides a kind of terminal for the output current for detecting charger, the terminal to include First charging circuit and the second charging circuit, the terminal include:
Circuit opens module, for when detecting that charger is inserted into the terminal, opening first charging circuit And the first charging current of first charging circuit is set, and open second charging circuit;
Electric current increases module, for increasing stepping electricity in the second currently used charging current of second charging circuit Stream obtains the 3rd charging current of second charging circuit;
Voltage determination module, it is described under first charging current and the 3rd charging current effect for confirming Whether the output voltage of charger drops into pre-determined lower limit voltage;
Electric current determining module, for being confirmed according to described as a result, determining the output current of the charger.
Wherein, the electric current determining module is specifically used for:
If the output voltage of the charger drops into the pre-determined lower limit voltage, by first charging current and institute State output current of the sum of second charging current as the charger;
If the output voltage of the charger does not drop into pre-determined lower limit voltage, determined according to the 3rd charging current The output current of the charger.
Wherein, the electric current determining module is specifically used for:
Judge whether the 3rd charging current reaches the overload current of first charging circuit;
If the 3rd charging current reaches the overload current of first charging circuit, described first is charged The output current of the sum of electric current and the 3rd operating current as the charger.
Wherein, the circuit opens module, is additionally operable to when detecting that charger is inserted into the terminal, opens described the Two charging circuits;
The electric current increases module, is additionally operable to increase in the 4th currently used charging current of second charging circuit The stair step current obtains the 5th charging current of second charging circuit;
The voltage determination module, is additionally operable to judge the output electricity of the charger in the case where the 5th charging current acts on Whether pressure drops into the pre-determined lower limit voltage;
The electric current determining module, is additionally operable to, according to the judging result, determine the output current of the charger.
Wherein, the electric current determining module is specifically used for:
If the output voltage of the charger drops into the pre-determined lower limit voltage, using the 4th charging current as The output current of the charger;
If the output voltage of the charger does not drop into the pre-determined lower limit voltage and the 5th charging current reaches The overload current of second charging circuit, then close second charging circuit, and then performs and described open described the One charging circuit and the first charging current for setting first charging circuit, and open the operation of second charging circuit Step.
Implement the embodiment of the present invention, when detecting that charger is inserted into the terminal, open first charging circuit And the first charging current of first charging circuit is set, and open second charging circuit;In the described second charging Increase stair step current in the second currently used charging current of circuit and obtain the 3rd charging current of second charging circuit;Really Whether the output voltage for recognizing the charger under first charging current and the 3rd charging current effect drops into Pre-determined lower limit voltage;Confirmed according to described as a result, determining the output current of the charger.Matched somebody with somebody by twin-channel charging circuit The output current of detection charger is closed, the specification requirement to charging circuit and power inductance can be reduced, reduces device cost.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Attached drawing be briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this area For those of ordinary skill, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of first embodiment flow chart of the method for output current for detecting charger proposed by the present invention;
Fig. 2 is a kind of second embodiment flow chart of the method for output current for detecting charger proposed by the present invention;
Fig. 3 is a kind of structure diagram of binary channels charging circuit provided in an embodiment of the present invention;
Fig. 4 is a kind of structure diagram of the terminal of the output current for detection charger that the embodiment of the present invention proposes.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained without creative efforts Example, belongs to the scope of protection of the invention.
Please refer to Fig.1, Fig. 1 is a kind of first embodiment of the method for output current for detecting charger proposed by the present invention Flow chart.As shown in the figure, the method in the embodiment of the present invention includes:
S101, when detecting that charger is inserted into the terminal, opens first charging circuit and sets described the First charging current of one charging circuit, and open second charging circuit.
In the specific implementation, as shown in figure 3, Fig. 3 is a kind of structure diagram of binary channels charging circuit.It can set described The initial current of second charging circuit is 500mA, and is confirmed under the action of the first charging current and initial current, charger Output voltage whether drop into pre-determined lower limit voltage, if the output voltage of charger drops into pre-determined lower limit voltage, by The output current of the sum of one charging current and initial current as the charger, if the output voltage of charger do not drop into it is pre- The initial current of voltage limit and the second charging circuit is set not less than the overload current of the second charging circuit, then performs operations described below Step.Wherein, the first charging current for the first charging circuit overload current and the second charging circuit overload current between compared with A small electric current subtracted after 500mA, the overload current of the first charging circuit are the overload current and first of the first integrated circuit Less one between the overload current of inductance, the overload current of the second charging circuit for the second integrated circuit overload current with Less one between the overload current of second inductance.It should be noted that due to the increase of charging current, in output power one In the case of fixed, the output voltage of charger will be pulled low.
S102, in the second currently used charging current of second charging circuit increasing stair step current obtains described the 3rd charging current of two charging circuits.Wherein, stair step current can be 10~200mA, but be not limited to above-mentioned current value, the Two charging currents can be initial current, or initial current adds the current value of at least one stair step current.
S103, confirms the output of the charger under first charging current and the 3rd charging current effect Whether voltage drops into pre-determined lower limit voltage.
S104, confirms as a result, determining the output current of the charger according to described.
If in the specific implementation, the output voltage of the charger drops into the pre-determined lower limit voltage, by described first The output current of the sum of charging current and second charging current as the charger;If the output voltage of the charger Pre-determined lower limit voltage is not dropped into, then the output current of the charger is determined according to the 3rd charging current.
Further, it can be determined that whether the 3rd charging current reaches the overload current of first charging circuit; If the 3rd charging current reaches the overload current of first charging circuit, by first charging current and institute State output current of the sum of the 3rd operating current as the charger.Filled if the 3rd charging current does not reach described first The overload current of circuit, then continue to execute S102~S104.
In embodiments of the present invention, when detecting that charger is inserted into the terminal, first charging circuit is opened And the first charging current of first charging circuit is set, and open second charging circuit;In the described second charging Increase stair step current in the second currently used charging current of circuit and obtain the 3rd charging current of second charging circuit;Really Whether the output voltage for recognizing the charger under first charging current and the 3rd charging current effect drops into Pre-determined lower limit voltage;Confirmed according to described as a result, determining the output current of the charger.Matched somebody with somebody by twin-channel charging circuit The output current of detection charger is closed, the specification requirement to charging circuit and power inductance can be reduced, reduces device cost.
Please refer to Fig.2, Fig. 2 is a kind of second embodiment of the method for output current for detecting charger proposed by the present invention Flow chart.As shown in the figure, the method in the embodiment of the present invention includes:
S201, when detecting that charger is inserted into the terminal, opens second charging circuit.
In the specific implementation, the initial current of the second charging circuit can be set as 500mA, if under the action of initial current The output voltage of the charger drops into pre-determined lower limit voltage, then confirms that charging is abnormal and exits, if in initial current The output voltage of the charger does not drop into pre-determined lower limit voltage under effect, then continues to execute operations described below step.
S202, in the 4th currently used charging current of second charging circuit increasing the stair step current obtains institute State the 5th charging current of the second charging circuit.Wherein, stair step current can be 10~200mA, but be not limited to above-mentioned electric current Value, the 4th charging current can be initial current, or initial current adds the current value of at least one stair step current.
S203, judge the 5th charging current act under the charger output voltage whether drop into it is described pre- Set voltage limit.
S204, if the output voltage of the charger drops into the pre-determined lower limit voltage, by the described 4th charging electricity Flow the output current as the charger.
S205, if the output voltage of the charger does not drop into pre-determined lower limit voltage, judges the 5th charging current Reach the overload current of second charging circuit.
S206, if the 5th charging current reaches the overload current of second charging circuit, closes described the Two charging circuits, and perform the first charging electricity opened first charging circuit and set first charging circuit Stream, and open second charging circuit;If the 5th charging current does not reach the mistake of second charging circuit Electric current is carried, continues to execute S202~S205.
S207, in the second currently used charging current of second charging circuit increasing stair step current obtains described the 3rd charging current of two charging circuits.Wherein, stair step current can be 10~200mA, but be not limited to above-mentioned current value, the Two charging currents can be initial current, or initial current adds the current value of at least one stair step current.
S208, confirms the output of the charger under first charging current and the 3rd charging current effect Whether voltage drops into pre-determined lower limit voltage.
S209, if the output voltage of the charger drops into the pre-determined lower limit voltage, by the described first charging electricity The output current of the sum of stream and second charging current as the charger.
S210, if the output voltage of the charger does not drop into pre-determined lower limit voltage, judges the 3rd charging electricity Whether stream reaches the overload current of first charging circuit.
S211, if the 3rd charging current reaches the overload current of first charging circuit, by described the The output current of the sum of one charging current and the 3rd operating current as the charger;If the 3rd charging current is not The overload current of first charging circuit is reached, continues to execute S207~S210.
In embodiments of the present invention, when detecting that charger is inserted into the terminal, the second charging circuit is first turned on, And increase stair step current on the initial current of the second charging circuit, when can not detect charger using the second charging circuit During output current, while the first charging circuit and the second charging circuit are opened, and set the first charging of the first charging circuit Electric current, then increases stair step current in the second currently used charging current of the second charging circuit and obtains the second charging electricity 3rd charging current on road, confirms the charger under first charging current and the 3rd charging current effect Whether output voltage drops into pre-determined lower limit voltage;Finally confirmed according to described as a result, determining the output current of the charger. Coordinate the output current of detection charger by twin-channel charging circuit, the rule to charging circuit and power inductance can be reduced Lattice requirement, reduces device cost.
Please refer to Fig.4, Fig. 4 is a kind of structure of the terminal of the output current for detection charger that the embodiment of the present invention proposes Schematic diagram.As shown in the figure, the terminal in the embodiment of the present invention includes:
Circuit opens module 401, for when detecting that charger is inserted into the terminal, opening the first charging electricity Road and the first charging current for setting first charging circuit, and open second charging circuit.
In the specific implementation, as shown in figure 3, Fig. 3 is a kind of structure diagram of binary channels charging circuit.It can set described The initial current of second charging circuit is 500mA, and is confirmed under the action of the first charging current and initial current, charger Output voltage whether drop into pre-determined lower limit voltage, if the output voltage of charger drops into pre-determined lower limit voltage, by The output current of the sum of one charging current and initial current as the charger, if the output voltage of charger do not drop into it is pre- The initial current of voltage limit and the second charging circuit is set not less than the overload current of the second charging circuit, then performs operations described below Step.Wherein, the first charging current for the first charging circuit overload current and the second charging circuit overload current between compared with A small electric current subtracted after 500mA, the overload current of the first charging circuit are the overload current and first of the first integrated circuit Less one between the overload current of inductance, the overload current of the second charging circuit for the second integrated circuit overload current with Less one between the overload current of second inductance.It should be noted that due to the increase of charging current, in output power one In the case of fixed, the output voltage of charger will be pulled low.
Electric current increases module 402, for increasing step in the second currently used charging current of second charging circuit The 3rd charging current of second charging circuit is obtained into electric current.Wherein, stair step current can be 10~200mA, but not office It is limited to above-mentioned current value, the second charging current can be initial current, or initial current adds at least one stepping The current value of electric current.
Voltage determination module 403, for confirming under first charging current and the 3rd charging current effect Whether the output voltage of the charger drops into pre-determined lower limit voltage.
Electric current determining module 404, for being confirmed according to described as a result, determining the output current of the charger.
If in the specific implementation, the output voltage of the charger drops into the pre-determined lower limit voltage, by described first The output current of the sum of charging current and second charging current as the charger;If the output voltage of the charger Pre-determined lower limit voltage is not dropped into, then the output current of the charger is determined according to the 3rd charging current.
Further, it can be determined that whether the 3rd charging current reaches the overload current of first charging circuit; If the 3rd charging current reaches the overload current of first charging circuit, by first charging current and institute State output current of the sum of the 3rd operating current as the charger.Filled if the 3rd charging current does not reach described first The overload current of circuit, then increase stair step current, then again by electric current increase module 402 in the 3rd charging current Perform voltage determination module 403 and electric current determining module 404.
Optionally, circuit opens module 401, is additionally operable to when detecting that charger is inserted into the terminal, described in opening Second charging circuit.Specifically, the initial current of the second charging circuit can be set as 500mA, if in the effect of initial current Under the output voltage of the charger drop into pre-determined lower limit voltage, then confirm that charging is abnormal and exits, if in initial current Under the action of the output voltage of the charger do not drop into pre-determined lower limit voltage, then continue to execute following function module.
Electric current increases module 402, is additionally operable to increase in the 4th currently used charging current of second charging circuit The stair step current obtains the 5th charging current of second charging circuit.
Voltage determination module 403, is additionally operable to judge the output electricity of the charger in the case where the 5th charging current acts on Whether pressure drops into the pre-determined lower limit voltage.
Electric current determining module 404, is additionally operable to, according to the judging result, determine the output current of the charger.
Further alternative, electric current determining module 404 is specifically used for:
If the output voltage of the charger drops into the pre-determined lower limit voltage, using the 4th charging current as The output current of the charger.
If the output voltage of the charger does not drop into the pre-determined lower limit voltage and the 5th charging current reaches The overload current of second charging circuit, then close second charging circuit, and then opens module 401 by circuit and hold Row is described to be opened first charging circuit and simultaneously sets the first charging current of first charging circuit, and opens described the The operating procedure of two charging circuits.If the output voltage of the charger does not drop into the pre-determined lower limit voltage and the described 5th Charging current does not reach the overload current of second charging circuit, then by electric current increase module 402 in the 5th charging electricity Increase stair step current on stream, and then re-execute voltage determination module 403 and electric current determining module 404.
In embodiments of the present invention, when detecting that charger is inserted into the terminal, first charging circuit is opened And the first charging current of first charging circuit is set, and open second charging circuit;In the described second charging Increase stair step current in the second currently used charging current of circuit and obtain the 3rd charging current of second charging circuit;Really Whether the output voltage for recognizing the charger under first charging current and the 3rd charging current effect drops into Pre-determined lower limit voltage;Confirmed according to described as a result, determining the output current of the charger.Matched somebody with somebody by twin-channel charging circuit The output current of detection charger is closed, the specification requirement to charging circuit and power inductance can be reduced, reduces device cost.
It should be noted that for foregoing each embodiment of the method, in order to be briefly described, therefore it is all expressed as to a system The combination of actions of row, but those skilled in the art should know, the present invention and from the limitation of described sequence of movement, because For according to the present invention, certain some step can use other orders or be carried out at the same time.Secondly, those skilled in the art also should Know, embodiment described in this description belongs to preferred embodiment, involved action and module not necessarily this hair Necessary to bright.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and is not described in some embodiment Part, may refer to the associated description of other embodiment.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can To instruct relevant hardware to complete by program, which can be stored in a computer-readable recording medium, storage Medium can include:Flash disk, read-only storage (English:Read-Only Memory, referred to as:ROM), random access device (English Text:Random Access Memory, referred to as:RAM), disk or CD etc..
The content download method and relevant device that are there is provided above the embodiment of the present invention, system are described in detail, Specific case used herein is set forth the principle of the present invention and embodiment, and the explanation of above example is simply used Understand the method and its core concept of the present invention in help;Meanwhile for those of ordinary skill in the art, according to the present invention's Thought, there will be changes in specific embodiments and applications, in conclusion this specification content should not be construed as Limitation of the present invention.

Claims (8)

  1. A kind of 1. method for the output current for detecting charger, it is characterised in that terminal includes the first charging circuit and second Charging circuit, the described method includes:
    When detecting that charger is inserted into the terminal, open first charging circuit and set first charging circuit The first charging current, and open second charging circuit;
    Increase stair step current in the second currently used charging current of second charging circuit and obtain the second charging electricity 3rd charging current on road;
    Whether the output voltage of confirmation charger under first charging current and the 3rd charging current effect Drop into pre-determined lower limit voltage;
    According to confirmation as a result, determining the output current of the charger, including:If the output voltage of the charger drops into institute Pre-determined lower limit voltage is stated, then the output using the sum of first charging current and second charging current as the charger Electric current;If the output voltage of the charger does not drop into pre-determined lower limit voltage, institute is determined according to the 3rd charging current State the output current of charger.
  2. 2. the method as described in claim 1, it is characterised in that described that the charger is determined according to the 3rd charging current Output current include:
    Judge whether the 3rd charging current reaches the overload current of first charging circuit;
    If the 3rd charging current reaches the overload current of first charging circuit, by first charging current With the output current of the sum of the 3rd charging current as the charger.
  3. 3. the method as described in claim 1, it is characterised in that it is described when detecting that charger is inserted into the terminal, beat Drive first charging circuit and set the first charging current of first charging circuit, and open the second charging electricity Before road, further include:
    When detecting that charger is inserted into the terminal, second charging circuit is opened;
    Increase the stair step current in the 4th currently used charging current of second charging circuit and obtain described second and fill 5th charging current of circuit;
    Judge whether the output voltage of the charger in the case where the 5th charging current acts on drops into the pre-determined lower limit electricity Pressure;
    According to judging result, the output current of the charger is determined.
  4. 4. method as claimed in claim 3, it is characterised in that it is described according to the judging result, determine the charger Output current includes:
    If the output voltage of the charger drops into the pre-determined lower limit voltage, using the 4th charging current as described in The output current of charger;
    If the output voltage of the charger is not dropped into described in the pre-determined lower limit voltage and the 5th charging current arrival The overload current of second charging circuit, then close second charging circuit, and performs opening first charging circuit And the first charging current of first charging circuit is set, and open the operating procedure of second charging circuit.
  5. 5. it is a kind of detect charger output current terminal, it is characterised in that the terminal include the first charging circuit and Second charging circuit, the terminal include:
    Circuit opens module, for when detecting that charger is inserted into the terminal, opening first charging circuit and setting First charging current of fixed first charging circuit, and open second charging circuit;
    Electric current increases module, is obtained for increasing stair step current in the second currently used charging current of second charging circuit To the 3rd charging current of second charging circuit;
    Voltage determination module, for confirming the charging under first charging current and the 3rd charging current effect Whether the output voltage of device drops into pre-determined lower limit voltage;
    Electric current determining module, for according to confirm as a result, determine the charger output current, including:If the charger Output voltage drop into the pre-determined lower limit voltage, then by the sum of first charging current and second charging current make For the output current of the charger;If the output voltage of the charger does not drop into pre-determined lower limit voltage, according to 3rd charging current determines the output current of the charger.
  6. 6. terminal as claimed in claim 5, it is characterised in that the electric current determining module is specifically used for:
    Judge whether the 3rd charging current reaches the overload current of first charging circuit;
    If the 3rd charging current reaches the overload current of first charging circuit, by first charging current With the output current of the sum of the 3rd charging current as the charger.
  7. 7. terminal as claimed in claim 5, it is characterised in that
    The circuit opens module, is additionally operable to when detecting that charger is inserted into the terminal, opens the second charging electricity Road;
    The electric current increases module, is additionally operable in the 4th currently used charging current of second charging circuit described in increase Stair step current obtains the 5th charging current of second charging circuit;
    The voltage determination module, the output voltage for being additionally operable to judge the charger in the case where the 5th charging current acts on are It is no to drop into the pre-determined lower limit voltage;
    The electric current determining module, is additionally operable to according to judging result, determines the output current of the charger.
  8. 8. terminal as claimed in claim 7, it is characterised in that the electric current determining module is specifically used for:
    If the output voltage of the charger drops into the pre-determined lower limit voltage, using the 4th charging current as described in The output current of charger;
    If the output voltage of the charger is not dropped into described in the pre-determined lower limit voltage and the 5th charging current arrival The overload current of second charging circuit, then close second charging circuit, and then performs the opening the first charging electricity Road and the first charging current for setting first charging circuit, and open the operating procedure of second charging circuit.
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