CN102624950B - Mobile phone - Google Patents
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- CN102624950B CN102624950B CN201210052195.5A CN201210052195A CN102624950B CN 102624950 B CN102624950 B CN 102624950B CN 201210052195 A CN201210052195 A CN 201210052195A CN 102624950 B CN102624950 B CN 102624950B
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Abstract
The invention discloses a mobile phone, which comprises a baseband signal processing chip, a charging interface and a detection circuit. The charging interface is selectively connected with a charging port of a charger, a charging voltage provided by the charger is obtained when the charging interface is connected with the charging port, the detection circuit comprises an input end and an output end, the input end is connected with the charging interface to obtain the charging voltage, the charging voltage is compared with a threshold voltage by the detection circuit, an interrupt signal is output by the output end when the charging voltage is lower than the threshold voltage, and the baseband signal processing chip obtains the interrupt signal and judges that the charger works under an overload condition according to the interrupt signal. The invention further discloses a method for detecting the condition of the charger of the mobile phone. The mobile phone and the method for detecting the condition of the charger of the mobile phone can accurately detect the condition of the charger so as to judge if the charger works under the overload condition by introducing a set of the detection circuit between the charging interface of the mobile phone and the baseband signal processing chip.
Description
Technical field
The present invention relates to cellular phone power supplies field, particularly relate to a kind of mobile phone and charger states method for detecting thereof.
background technology
Along with the development of wireless messages technology, mobile phone day by day becomes the necessity in people's daily life, and user uses mobile phone continually to handle official business, learns and amusement.But also Just because of this, the power consumption of mobile phone constantly increases, and the flying power of the battery of mobile phone is more inadequate, so user usually can use charger to charge to mobile phone.
At present, charger has become the standard fitting of mobile phone, it has formed multiple standard, namely allow compatible between different chargers, such as with MoU (Memorandum of Understanding, memorandum of understanding) be the European standard of representative, require that the mobile phone of mark MoU can compatible gauge be the various chargers of 550mA ~ 1500mA.General charger is all perform certain rechargeable standard, does not need to specially require other charging current.When user uses charger, may be too little due to charger earth resistance, mobile phone leaks electricity, and the various reasons such as mobile phone circuit is breakdown, and supply load is too large, are easy to make charger operation in overload, cause charging current obviously to increase.And charger is inserted in last very long on mobile phone by user habit, like this, once charger operation is in overload, will keep for a long time, if things go on like this, the circuit in charger and mobile phone can be caused to generate heat, reduce the insulation level of circuit, cause circuit to burn.Mobile phone and charger even may be caused to burn.
summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of mobile phone and charger states method for detecting thereof, accurately can detect the state of charger.
For solving the problems of the technologies described above, the invention provides a kind of mobile phone, this mobile phone comprises base band signal processing chip, also comprises charging inlet further, this charging inlet is connected with the charging port alternative of charger, when charging inlet is connected with charging port, from the charging voltage that charging port acquisition charger provides; Circuit for detecting, comprise input and output, input is connected with charging inlet, output is connected with the interrupt signal input port of base band signal processing chip, and circuit for detecting obtains charging voltage from input, and charging voltage is compared with threshold voltage, when charging voltage is less than threshold voltage, utilize output to export interrupt signal, base band signal processing chip obtains interrupt signal by interrupt signal input port from output, and judges that charger operation is at overload according to interrupt signal.
Wherein, circuit for detecting comprises TPS3806 chip, the first resistance, the second resistance, the 3rd resistance and the 4th resistance further, wherein: input is connected with the first end of the first resistance, second end of the first resistance is connected with the first end of the second resistance, second end of the second resistance is connected with the first end of the 3rd resistance, the second end ground connection of the 3rd resistance; The vdd terminal mouth of TPS3806 chip is connected with input, and LS port is connected with the second end of the first resistance, and HS port is connected with the first end of the 3rd resistance, GND port ground connection, and RSTSENSE port is connected with output by the 4th resistance.
Wherein, circuit for detecting comprises the first electric capacity and the second electric capacity further, and the first end of the first electric capacity is connected with input, the second end ground connection of the first electric capacity, and the first end of the second electric capacity is connected with output, the second end ground connection of the second electric capacity.
Wherein, the resistance value of the first resistance, the second resistance and the 3rd resistance is arranged so that the magnitude of voltage of LS port is threshold voltage.
Wherein, mobile phone comprises reminding module further, reminding module is connected with base band signal processing chip, and when base band signal processing chip judges charger operation at overload, base band signal processing chip controls reminding module prompting user charger operation at overload.
Wherein, reminding module is loud speaker, motor or display screen.
Wherein, mobile phone comprises controlled switch further, and when base band signal processing chip judges charger operation at overload, base band signal processing chip controls the electrical connection that controlled switch cuts off charger and battery.
Wherein, base band signal processing chip obtains a predetermined number magnitude of voltage from output in the given time continuously by interrupt signal input port, when a predetermined number magnitude of voltage is all identical with the magnitude of voltage of interrupt signal, judges to get described interrupt signal.
For solving the problems of the technologies described above, present invention also offers a kind of charger states method for detecting of mobile phone, comprising: obtain the charging voltage that charger provides; Charging voltage is compared with threshold voltage, when charging voltage is less than threshold voltage, exports interrupt signal; Judge that charger operation is at overload according to interrupt signal.
Wherein, judging that according to interrupt signal charger operation is after the step of overload, cuts off the electrical connection of charger and battery.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention by introducing a set of circuit for detecting between the charging inlet and base band signal processing chip of mobile phone, accurately can detect the state of charger, to judge whether charger is operated in overload.
Accompanying drawing explanation
Fig. 1 is the charge construction schematic diagram of the mobile phone of first embodiment of the invention;
Fig. 2 is the circuit diagram of the circuit for detecting in first embodiment of the invention;
Fig. 3 is the oscillogram of the circuit for detecting shown in Fig. 2;
Fig. 4 is the charger states method for detecting flow chart of the mobile phone of second embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of protection of the invention.
Refer to Fig. 1, Figure 1 shows that the charge construction schematic diagram of the mobile phone of first embodiment of the invention.This mobile phone comprises charging inlet 101, circuit for detecting 102 and base band signal processing chip 103.
Wherein, charging inlet 101 is connected with the charging port alternative of outside charger, when charging inlet 101 is connected with charging port, from the charging voltage that charging port acquisition charger provides.
Circuit for detecting 102 comprises input and output, and input is connected with charging inlet 101, and output is connected with the interrupt signal input port of base band signal processing chip 103.When charging inlet 101 is connected with the charging port of charger, circuit for detecting 102 obtains charging voltage from input, and charging voltage is compared with threshold voltage, when charging voltage is less than threshold voltage, utilizes output to export interrupt signal.
Base band signal processing chip 103 comprises interrupt signal input port, and base band signal processing chip 103 obtains interrupt signal by interrupt signal input port from the output of circuit for detecting 102, and judges that charger operation is at overload according to interrupt signal.
In optional embodiment of the present invention, more a controlled switch (not shown) can be set in mobile phone, base band signal processing chip 103 is when judging charger operation at overload, control the electrical connection that this controlled switch cuts off charger and battery, when being absent from the scene to prevent user, charger is operated in overload always, thus causes the damage of mobile phone circuit.Such as, a logic switch device can be arranged in series on the circuit of charging inlet 101 to circuit for detecting 102, after base band signal processing chip 103 obtains interrupt signal, I/O interface can be utilized to export control signal control logic switching device disconnect, automatically cut off the electrical connection of battery and charger with this, avoid the danger that mobile phone or charger burn.Further, for the charger itself possessing overcurrent protection function, when base band signal processing chip 103 is judging that charger operation is after overload, before the electrical connection controlling this controlled switch cut-out charger and battery, base band signal processing chip 103 progressively reduces charging current, be such as the charger of 500mA for rated current, charging current reaches 800mA, base band signal processing chip 103 progressively reduces charging current, during charging current is down to 500mA from 800mA, detect charging voltage in random time section and recover normal, namely charging voltage is greater than threshold voltage, base band signal processing chip 103 is judged as detecting by mistake, proceed charging, after charging current is reduced to 500mA, still detects charging voltage and be less than threshold voltage, base band signal processing chip 103 judges that this charger does not mate with this mobile phone, controls the electrical connection that this controlled switch cuts off charger and battery.Like this, mobile phone can be made more to meet the requirement of MOU standard.
In optional embodiment of the present invention, mobile phone also can comprise reminding module (not shown) further, reminding module is connected with base band signal processing chip 103, when base band signal processing chip 103 judges charger operation at overload, base band signal processing chip 103 controls reminding module prompting user charger operation at overload, takes measures in time to make user and checks mobile phone.Wherein, reminding module can be loud speaker, motor or display screen.Can user's charger operation be pointed out at overload when user is on the scene, user manually can extract charger after knowing this information, carrys out the electrical connection of hand off battery and charger with this, avoids the danger that mobile phone or charger burn.
Due to the environment for use more complicated of mobile phone, circuit for detecting 102 in mobile phone more or less can be subject to the external world or even the interference of self, circuit for detecting 102 may produce the amplitude momentary pulse close with interrupt signal when running into interference, this will make base band signal processing chip 103 produce erroneous judgement, in order to avoid this thing happens, add stabilization process when base band signal processing chip 103 receive interruption signal.Preferably, this stabilization process is by realizing the mode that base band signal processing chip 103 carries out programming Control, concrete mode is: base band signal processing chip 103 obtains a predetermined number magnitude of voltage from the output of circuit for detecting 102 in the given time continuously by interrupt signal input port, when this predetermined number magnitude of voltage is all identical with the magnitude of voltage of interrupt signal, judge to get interrupt signal.This scheduled time and predetermined number can be determined according to actual design and interruption frequency.
Refer to Fig. 2, Figure 2 shows that the circuit diagram of the circuit for detecting in first embodiment of the invention.
This circuit for detecting comprises input IN, output OUT and chip TPS3806.Chip TPS3806 is provided with peripheral circuit, and this peripheral circuit comprises the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4.
Wherein, input IN is connected with the first end of the first resistance R1, second end of the first resistance R1 is connected with the first end of the second resistance R2, second end of the second resistance R2 is connected with the first end of the 3rd resistance R3, the second end ground connection GND of the 3rd resistance R3, output OUT is connected with the interrupt signal input port of base band signal processing chip;
The port VDD of chip TPS3806 is connected with input IN; port LS is connected with second end of the first resistance R1; port HS is connected with the first end of the 3rd resistance R3; port GND ground connection GND; port RSTSENSE is connected with output OUT by the 4th resistance R4, and the 4th resistance R4 is used for chip TPS3806 current-limiting protection.Port RESET does not use in this circuit for detecting, therefore unsettled.
Circuit for detecting comprises the first electric capacity C1 and the second electric capacity C2 further, gets AC signal disturbance for going.The first end of the first electric capacity C1 is connected with input IN, the second end ground connection GND of the first electric capacity C1, and the first end of the second electric capacity C2 is connected with output OUT, the second end ground connection GND of the second electric capacity C2.
This circuit for detecting can determine a threshold voltage by the first resistance R1, the second resistance R2 and the 3rd resistance R3.In the present embodiment, threshold voltage settings is 4.8V.This threshold voltage is the magnitude of voltage VLS at port LS place.It should be noted that the resistance value of the first resistance R1, the second resistance R2 and the 3rd resistance R3 is arranged so that magnitude of voltage VLS is threshold voltage, namely choosing of resistance value is not well-determined, only need meet following equation:
VLS＝Vref(R1+R2+R3)/(R2+R3)；
VHS＝Vref(R1+R2+R3)/R3；
Wherein, Vref is the reference voltage of chip TPS3806 inside, and magnitude of voltage is 1.207V.Magnitude of voltage VHS is the voltage at port HS place, can be used as Second Threshold voltage.In some cases, such as some mobile phone detects charger operation after overload also stops charging voluntarily, by self carrying out correcting and repairing then recovering charging, at this moment charging voltage can be compared with magnitude of voltage VHS, when charging voltage is greater than magnitude of voltage VHS, recover charging.Preferably, magnitude of voltage VHS is set as 4.95V.
To the operation principle of this circuit for detecting be described in detail below:
What input IN inputted is the charging voltage of charger, then port VDD obtains this charging voltage, by after the resistance value that arranges the first resistance R1, the second resistance R2 and the 3rd resistance R3, determine threshold voltage, charging voltage compares with threshold voltage by the chip TPS3806 of circuit for detecting, when charging voltage is less than threshold voltage, port RSTSENSE exports interrupt signal VRS by output OUT.In the present embodiment, this interrupt signal is logic low.
Refer to Fig. 3, Figure 3 shows that the oscillogram of the circuit for detecting shown in Fig. 2.
In oscillogram, abscissa is time shaft, and ordinate is magnitude of voltage.The charging voltage that VDD waveforms stands port VDD obtains from input IN.VHS waveforms stands Second Threshold voltage is fixed value.VLS waveforms stands threshold voltage, is less than VHS for fixed value.VRS waveform is the signal waveform that port RSTSENSE is exported by output OUT, and wherein, logic low represents interrupt signal.
In abscissa starting point to t
0in the moment, can think and just insert charger, now charging voltage rises gradually, and VRS is logic low, and now charging voltage is not accessed the charging circuit of mobile phone by base band signal processing chip; At t
0moment is to t
1in the moment, although VDD is greater than VLS, but still be less than VHS, charging voltage is not still accessed the charging circuit of mobile phone by base band signal processing chip; At t
1moment is to t
2in the moment, VDD is greater than VHS, and VRS saltus step is logic high, and charger starts as mobile phone charging; At t
2moment is to t
3in the moment, period, VDD declined to some extent, was once less than VHS, but magnitude of voltage is all greater than VLS, did not meet interrupt condition, and VRS continues to keep logic high; At t
4moment is to t
5in the moment, VDD drops to and is less than VLS, and VRS saltus step is logic low, and base band signal processing chip obtains this interrupt signal, and before VDD returns to and is greater than VHS, VRS continues to keep logic low, and be greater than VHS when VDD rises to, VRS again saltus step is logic high.
In the present embodiment, mainly utilize chip TPS3806 and peripheral circuit thereof to complete the corresponding function of circuit for detecting, and chip TPS3806 accurately can judge whether charging voltage is less than threshold voltage, and when determining charging voltage and being less than threshold voltage, export interrupt signal, and this chip structure is simple, with low cost, can be in large-scale application.And it should be noted that, the present invention does not do concrete restriction to the specific implementation of circuit for detecting, all can realization judges whether charging voltage is less than threshold voltage, and when determining charging voltage and being less than threshold voltage, the related circuit or the chip that export interrupt signal all can use as circuit for detecting in the present invention.
Refer to Fig. 4, Figure 4 shows that the charger states method for detecting flow chart of the mobile phone of second embodiment of the invention.The charger states method for detecting of mobile phone comprises the steps:
S401: obtain the charging voltage that charger provides;
S402: charging voltage compared with threshold voltage, when charging voltage is less than threshold voltage, exports interrupt signal;
Wherein, threshold voltage can preset according to actual needs.
Step S402 comprises further: by charging voltage and Second Threshold voltage compare, comparative case has two kinds: rise from the magnitude of voltage being less than threshold voltage in charging voltage, when being greater than Second Threshold voltage, stops exporting interrupt signal; When charging voltage is less than Second Threshold voltage but is greater than threshold voltage, do not export interrupt signal.
S403: judge that charger operation is at overload according to interrupt signal.
Wherein, in alternative of the present invention, following steps can be carried out further: at judgement charger operation after overload after step S403, user is pointed out, alerting pattern can be one or more of loud speaker, motor and display screen, or cut off the electrical connection of charger and battery, or while user is reminded, stop charging voluntarily.
Be to be understood that; the charger states method for detecting of the mobile phone in the circuit for detecting in the second embodiment and the 3rd embodiment is not limited to apply in mobile phone; also can be applicable to other need use in the electronic equipment of external charger; those skilled in the art can design other electronic equipment according to the common practise of this area and the present invention easily; therefore, the electronic equipment comprising the charger states method for detecting of circuit for detecting of the present invention and mobile phone should be included within protection scope of the present invention equally.
The present invention, by introducing a set of circuit for detecting between the charging inlet and base band signal processing chip of mobile phone, accurately can detect the state of charger, to judge whether charger is operated in overload; Further, can charger operation at overload time user is pointed out, or stop charging, the life-span of extending cell phone and charger.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a mobile phone, comprises base band signal processing chip, it is characterized in that, described mobile phone comprises further:
Charging inlet, the charging port alternative of described charging inlet and charger is connected, and when described charging inlet is connected with described charging port, obtains from described charging port the charging voltage that described charger provides;
Circuit for detecting, comprise input, output, TPS3806 chip, first resistance, second resistance, 3rd resistance and the 4th resistance, described input is connected with described charging inlet, described output is connected with the interrupt signal input port of described base band signal processing chip, described input is connected with the first end of described first resistance, second end of described first resistance is connected with the first end of described second resistance, second end of described second resistance is connected with the first end of described 3rd resistance, second end ground connection of described 3rd resistance, the vdd terminal mouth of described TPS3806 chip is connected with described input, LS port is connected with the second end of described first resistance, HS port is connected with the first end of described 3rd resistance, GND port ground connection, RSTSENSE port is connected with described output by described 4th resistance, described circuit for detecting obtains described charging voltage from described input, and described charging voltage is compared with threshold voltage, when described charging voltage is less than described threshold voltage, described output is utilized to export interrupt signal, described base band signal processing chip obtains described interrupt signal by described interrupt signal input port from described output, and judge that described charger operation is at overload according to described interrupt signal,
Wherein, the resistance value of described first resistance, described second resistance and described 3rd resistance is arranged so that the magnitude of voltage of described LS port is described threshold voltage.
2. mobile phone according to claim 1, it is characterized in that, described circuit for detecting comprises the first electric capacity and the second electric capacity further, the first end of described first electric capacity is connected with described input, second end ground connection of described first electric capacity, the first end of described second electric capacity is connected with described output, the second end ground connection of described second electric capacity.
3. mobile phone according to claim 1, it is characterized in that, described mobile phone comprises reminding module further, described reminding module is connected with described base band signal processing chip, when described base band signal processing chip judges described charger operation at overload, described base band signal processing chip controls charger operation described in described reminding module prompting user at overload.
4. mobile phone according to claim 3, is characterized in that, described reminding module is loud speaker, motor or display screen.
5. mobile phone according to claim 1, it is characterized in that, described mobile phone comprises controlled switch further, when described base band signal processing chip judges described charger operation at overload, described base band signal processing chip controls the electrical connection that described controlled switch cuts off described charger and battery.
6. mobile phone according to claim 1, it is characterized in that, described base band signal processing chip obtains a predetermined number magnitude of voltage from described output in the given time continuously by described interrupt signal input port, when a described predetermined number magnitude of voltage is all identical with the magnitude of voltage of described interrupt signal, judge to get described interrupt signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052195.5A CN102624950B (en) | 2012-03-01 | 2012-03-01 | Mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052195.5A CN102624950B (en) | 2012-03-01 | 2012-03-01 | Mobile phone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102624950A CN102624950A (en) | 2012-08-01 |
| CN102624950B true CN102624950B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210052195.5A Expired - Fee Related CN102624950B (en) | 2012-03-01 | 2012-03-01 | Mobile phone |
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| CN (1) | CN102624950B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360191B (en) * | 2014-11-14 | 2017-10-24 | 惠州Tcl移动通信有限公司 | Detection means and detection method that a kind of charger insertion is extracted |
| CN109698537B (en) * | 2019-01-31 | 2021-01-29 | 深圳和而泰小家电智能科技有限公司 | Charging circuit, charging detection method and device |
| CN110308349B (en) * | 2019-07-05 | 2021-12-03 | 科大讯飞股份有限公司 | Charging test method, intelligent charging product and charging test system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006149177A (en) * | 2004-09-02 | 2006-06-08 | Furukawa Electric Co Ltd:The | Protective part, protection device, battery pack and portable electronic device |
| US20060277420A1 (en) * | 2005-06-02 | 2006-12-07 | Nguyen Don J | Power supply for portable computer |
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Granted publication date: 20150304 |