CN201717653U - Charging circuit and mobile terminal comprising same - Google Patents
Charging circuit and mobile terminal comprising same Download PDFInfo
- Publication number
- CN201717653U CN201717653U CN2010202498625U CN201020249862U CN201717653U CN 201717653 U CN201717653 U CN 201717653U CN 2010202498625 U CN2010202498625 U CN 2010202498625U CN 201020249862 U CN201020249862 U CN 201020249862U CN 201717653 U CN201717653 U CN 201717653U
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Abstract
The utility model discloses a charging circuit comprising a solar battery and a charging battery as well as an LED control circuit, a charging current detection circuit and a charging control circuit, wherein the LED control circuit is used for reflecting the charging condition by controlling the turning on and off of an LED so as to prompt a user; the charging current detection circuit is used for detecting the size of the charging current and comparing the charging current with a threshold value so as to output a comparison signal; the comparison signal is conveyed to the charging control circuit and the LED control circuit; the charging current detection circuit is respectively connected with the LED control circuit and the charging control circuit. The utility model also discloses a mobile terminal comprising the charging circuit. The charging circuit is applicable to solar charging under the shutdown state and starting up state of the mobile terminal, can shutdown the charging of the charging battery under abnormal voltage and temperature and also can prevent the current of the battery from flowing backwards.
Description
Technical field
The portable terminal that the utility model relates to a kind of charging circuit and comprises this charging circuit.
Background technology
Along with the aggravation of environmental pollution, low-carbon economy is referred national strategic level.Solar energy as a kind of pollution-free, inexhaustible, obtained widely paying close attention to it energy without cease.Solar cell, solar water heater, solar power generation etc. have obtained using widely.
Mobile phone has brought huge change for human communication because of it has mobility, and very big convenience is provided.But mobile phone is owing to the restriction of its volume, and the capacity of battery becomes an important bottleneck.Cause the situation of communication disruption all reappearing every day because there not being electricity.If solar energy and mobile phone can be combined, can improve the conversation flying power of mobile phone widely, having sunlight just can converse is a human fine hope.
The utility model content
The technical problems to be solved in the utility model is in order to overcome the short defective of prior art battery of mobile terminal stand-by time, the portable terminal that a kind of charging circuit is provided and uses this charging circuit.
The utility model solves above-mentioned technical problem by following technical proposals:
A kind of charging circuit, it comprises solar cell and rechargeable battery, its characteristics are that this charging circuit also comprises:
The LED control circuit is used for reflecting that by the light on and off of control LED charge condition is with the prompting user;
The charging current testing circuit, be used to detect the size of charging current and with this charging current and a threshold ratio with the output comparison signal, this comparison signal is sent to charging control circuit and this LED control circuit;
Charging control circuit is used to adopt the charging current greater than threshold value that rechargeable battery is charged;
Wherein, this charging current testing circuit links to each other with this charging control circuit with this LED control circuit respectively, and this solar cell links to each other with charging control circuit with LED control circuit, charging current testing circuit respectively.
Preferably, this charging current testing circuit comprises an operational amplifier and a level detector, and this operational amplifier links to each other with this level detector by a switching tube.
Preferably, this LED control circuit comprises red-light LED, green light LED, blue-ray LED, LDO and a solar array voltage detection module, wherein this LDO links to each other with the solar array voltage detection module, and the output of this LDO is connected with this red-light LED, green light LED, blue-ray LED by switching tube respectively.
Preferably, charging control circuit comprises a NOR gate, counnter attack filling LDO and a temperature switch, the power end that LDO is irritated in this counnter attack is connected with the input of this NOR gate by the charging control valve, the Enable Pin that LDO is irritated in this counnter attack is connected to the output of this temperature switch by a diode, and the output that LDO is irritated in this counnter attack is connected with a discharge switch pipe with rechargeable battery respectively.
The utility model also provides a kind of portable terminal, and its characteristics are that it comprises aforesaid charging circuit.
Positive progressive effect of the present utility model is:
1, directly adopts the solar energy electroplax that battery is charged, rather than the output of solar energy electroplax is received on the charging circuit of mobile phone.
2, charging circuit of the present utility model can detect the electric current of 1mA, and judges according to the detection of this electric current whether battery of mobile phone has been carried out effective charging.
3, charging circuit of the present utility model has adopted three kinds of different LED lamps, shows the different conditions of charging.
4, charging circuit of the present utility model is applicable to the solar recharging of solar recharging and mobile phone power-on state under the mobile phone shutdown state.
5, charging circuit of the present utility model has been strengthened security performance, can turn-off the charging of battery under abnormal voltage, abnormal temperature, and increase discharge circuit.
6, charging circuit of the present utility model adopts the 4.1V LDO that counnter attack is irritated, and has prevented pouring in down a chimney of battery current.
Description of drawings
Fig. 1 is the structured flowchart of charging circuit of the present utility model.
Fig. 2-4 is the circuit diagram of charging circuit of the present utility model.
Fig. 5 is the circuit diagram of charging current testing circuit.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
With reference to figure 1, charging circuit, it comprises solar cell 1 and rechargeable battery 5, this charging circuit also comprises:
With reference to figure 3, this charging current testing circuit comprises an operational amplifier U3 and a level detector U4, and this operational amplifier U3 links to each other with this level detector U4 by a switching tube Q10.
With reference to figure 2, this LED control circuit comprises red-light LED, green light LED, blue-ray LED, LDOU1 and a solar array voltage detection module U2, wherein this LDO links to each other with the solar array voltage detection module, and the output of this LDO is connected with this red-light LED, green light LED, blue-ray LED with Q3 by switching tube Q1, Q2 respectively.
With reference to figure 4, charging control circuit comprises a NOR gate U7, counnter attack filling LDOU5 and a temperature switch U6, the power end VDD that LDOU5 is irritated in this counnter attack is connected with the input A of this NOR gate U7 with Q11 by charging control valve Q12, the CE that enables that LDO is irritated in this counnter attack holds the output DETL that is connected to this temperature switch U6 by a diode D3, and the output VOUT that LDO is irritated in this counnter attack is connected with a discharge switch pipe Q13 with rechargeable battery respectively.LDO U5, temperature switch U6, NOR gate U7 and charge switch pipe Q12, Q11 and the peripheral devices of 4.1V irritated in the counnter attack of charging control circuit, can control the charging of solar energy electroplax adversary machine battery, and can come the open and close charging circuit according to the condition difference.Battery of mobile phone in danger down (voltage surpasses 4.3V, and temperature surpasses 60 when spending) this circuit can also come to battery discharge by opening Q14, strengthened the fail safe of design like this.Because U5 has adopted the LDO of the 4.1V that prevents reverse charging, can charge oppositely for the solar energy electroplax so worry the electric current of battery of mobile phone.When temperature switch U6 is in 0-60 degree centigrade in temperature, can provide high level, and when temperature greater than 60 degrees centigrade or during less than 0 degree centigrade, can output low level.The effect of NOR gate U7 and switching tube Q13 is: when but changing to closed condition by the state of charging the battery, the electric charge of the D utmost point of charge switch pipe Q12 can be released by switching tube Q13, thereby is unlikely to damage charge switch pipe Q12.
Below in conjunction with Fig. 2-Fig. 5, introduce charging circuit of the present utility model in detail, wherein for convenience, represent N node with the form of NET_N, red LED green LED blue led indicates with LED1, LED2 and LED3 respectively successively.The functional module that is applied in the present embodiment is commercially available chip, only illustrates among the embodiment, and those skilled in the art can select different commercially available prod as required.The model of each functional module and logic level are selected as follows:
Solar array voltage detection module U2, when solar array voltage during more than or equal to 2.7V, it is output as high level, otherwise, then be low level; Operational amplifier U3, model TC75S101FU, the inverting input electric current is more than or equal to 1mA, and then operational amplifier is output as high level, otherwise then is low level; Level detector U4, model R3111D, input voltage are less than 1.1V, and output is a high level, otherwise then are low level; LDOU5, model R1112N are irritated in counnter attack; Temperature switch U6, model S-5842ADAAK is time output high level between 0-60 ℃ in temperature only, otherwise is low level; NOR gate U7, model L74VHC1G03, the relation of its input A, B and output Y is as shown in table 1 below.Here just some preferred chip model and logic level settings, those skilled in the art can do corresponding change according to self needs.
The logic level of table 1 NOR gate
| A | B | Y |
| L | L | H |
| H | L | L |
| L | H | L |
| H | H | L |
At first introduce the logic state of the charging circuit under the off-mode.Under off-mode, the charging test side CHARGER_DET of mobile phone base band chip, discharge Enable Pin DISCHARGE CNT, rechargeable solar battery control end SOLA_CHG_CNTR and solar cell temperature control end SOLA_CN_TEMP are low level.Under the mobile phone power-on state, baseband chip can be controlled the state of solar recharging according to CHARGER_DET, SOLA_CN_TEMP, these three mouths of SOLA_CHG_CNTR.When baseband chip detected battery temperature and exceeds 0-60 degree centigrade, software turn-offed charging by SOLA_CN_TEMP.Software can also turn-off solar recharging by SOLA_CHG_CNTR in addition.
No rechargeable battery is that battery connector J1 does not insert battery, only has under the situation of solar cell, and NET_A is a high level, switching tube Q7, Q9 conducting thus, NET_B is a low level like this, and with reference to figure 2, switching tube Q5 turn-offs as can be known, NET_C also is a low level, because the Q9 conducting so NET_E is a low level, does not have rechargeable battery charging control valve Q12 and Q11 this moment owing to NET_E is that low level is turn-offed, so NET_D is a low level, red, green and blue LED 1, LED2 and LED3 all end.
When inserting rechargeable battery, NET_A is a low level, and when the output voltage of solar cell during less than 2.7V, solar array voltage detection module U2 will make that NET_B, NET_C are low level, and same red, green, blue lamp can be not bright.
And when the output voltage of solar energy electroplax during greater than 2.7V, NET_B is a high level, if and battery temperature is not between 0-60 degree centigrade the time, temperature switch U6 is with output low level, NET_E will be low level like this, thereby make that NET_C is a low level, like this because switching tube Q1 conducting will be lighted red LED lamp, extinguish green and blue led lamp, inform user's temperature overheating this moment.
Insert the rechargeable battery battery, and the voltage of solar cell is greater than 2..7V, temperature is also in 0-60 ℃ scope, be that rechargeable battery is under the chargeable condition, this moment, NET_A was a low level, and NET_B is a high level, and NET_E is a high level, if detected charging current is more than or equal to 1mA, then NET_D is a low level, switching tube Q2 conducting this moment, and switching tube Q4 turn-offs, switching tube Q3 also turn-offs thus, like this, have only the green LED conducting, red and blue led all ends, give a green light this moment, informs that the user charges to rechargeable battery by solar cell.If detected charging current is less than 1mA, then NET_D is a high level, and this moment, switching tube Q1 and Q2 turn-offed, switching tube Q3 and Q4 conducting, and this moment, a sapphirine LED informed the user because charging current is too little, can't effectively charge.
Then, introduce the situation of the charging circuit logic level under the open state.
If mobile phone is under the open state, insert adaptor charge, this moment then no thoroughfare rechargeable solar battery, baseband chip can be arranged to high level with charging test side CHARGER_DET, discharge Enable Pin DISCHARGE CNT is a low level, rechargeable solar battery control end SOLA_CHG_CNTR is a high level, solar cell temperature control end SOLA_CN_TEMP is a high level, NET_A is a low level, switching tube Q8 conducting this moment, NET_B is a low level, and NET_C is a low level, and the red, green, blue lamp can not normally be lighted.
If there is not adapter to insert, temperature is in 0-60 ℃, can be arranged to low level this moment with the charging test side CHARGER_DET of baseband chip, discharge Enable Pin DISCHARGE CNT is a low level, rechargeable solar battery control end SOLA_CHG_CNTR is a high level, solar cell temperature control end SOLA_CN_TEMP is a low level, this moment, switching tube Q8 turn-offed, and when solar array voltage during more than or equal to 2.7V, NET_B is a high level, switching tube Q18 turn-offs, this moment, NET_E was a high level, and then switching tube Q1 turn-offs, if the electric current that solar cell is a rechargeable battery to charge is more than or equal to 1mA, then NET_D is a low level, this moment, switching tube Q4 turn-offed, and switching tube Q3 turn-offs thus, switching tube Q2 conducting, have only green LED bright this moment, the prompting user charges normal to rechargeable battery by solar cell, if the electric current that solar cell is a rechargeable battery to charge is less than 1mA, then with reference to above-mentioned situation, sapphirine LED, the prompting user can't effectively charge to rechargeable battery.
Those skilled in the art can be with reference to above analysis, and associative list 2 and table 3 obtain the charge condition under the various states of switching on and shutting down, so do not give unnecessary details.
Though more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection range of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection range of the present utility model.
Claims (5)
1. charging circuit, it comprises solar cell and rechargeable battery, it is characterized in that, this charging circuit also comprises:
Be used for reflecting the LED control circuit of charge condition with the prompting user by the light on and off of control LED;
Be used to detect the size of charging current and with this charging current and a threshold ratio with the charging current testing circuit of output comparison signal, this comparison signal is sent to charging control circuit and this LED control circuit;
Be used to adopt the charging control circuit that rechargeable battery is charged greater than the charging current of threshold value;
Wherein, this charging current testing circuit links to each other with this charging control circuit with this LED control circuit respectively, and this solar cell links to each other with charging control circuit with LED control circuit, charging current testing circuit respectively.
2. charging circuit as claimed in claim 1 is characterized in that, this charging current testing circuit comprises an operational amplifier and a level detector, and this operational amplifier links to each other with this level detector by a switching tube.
3. charging circuit as claimed in claim 2, it is characterized in that, this LED control circuit comprises red-light LED, green light LED, blue-ray LED, LDO and a solar array voltage detection module, wherein this LDO links to each other with the solar array voltage detection module, and the output of this LDO is connected with this red-light LED, green light LED, blue-ray LED by switching tube respectively.
4. charging circuit as claimed in claim 1, it is characterized in that, charging control circuit comprises a NOR gate, counnter attack filling LDO and a temperature switch, the power end that LDO is irritated in this counnter attack is connected with the input of this NOR gate by the charging control valve, the Enable Pin that LDO is irritated in this counnter attack is connected to the output of this temperature switch by a diode, and the output that LDO is irritated in this counnter attack is connected with a discharge switch pipe with rechargeable battery respectively.
5. a portable terminal is characterized in that, it comprises as any described charging circuit among the claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202498625U CN201717653U (en) | 2010-07-06 | 2010-07-06 | Charging circuit and mobile terminal comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202498625U CN201717653U (en) | 2010-07-06 | 2010-07-06 | Charging circuit and mobile terminal comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717653U true CN201717653U (en) | 2011-01-19 |
Family
ID=43463659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202498625U Expired - Fee Related CN201717653U (en) | 2010-07-06 | 2010-07-06 | Charging circuit and mobile terminal comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717653U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013174081A1 (en) * | 2012-05-23 | 2013-11-28 | 中兴通讯股份有限公司 | Charging circuit and control method therefor |
| CN104062590A (en) * | 2013-03-21 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Battery charging time testing apparatus |
| CN104201748A (en) * | 2014-09-28 | 2014-12-10 | 深圳市伊爱高新技术开发有限公司 | Intelligent charging circuit |
-
2010
- 2010-07-06 CN CN2010202498625U patent/CN201717653U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013174081A1 (en) * | 2012-05-23 | 2013-11-28 | 中兴通讯股份有限公司 | Charging circuit and control method therefor |
| US9509150B2 (en) | 2012-05-23 | 2016-11-29 | Zte Corporation | Charging circuit and control method therefor |
| CN104062590A (en) * | 2013-03-21 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Battery charging time testing apparatus |
| CN104201748A (en) * | 2014-09-28 | 2014-12-10 | 深圳市伊爱高新技术开发有限公司 | Intelligent charging circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20140706 |
|
| EXPY | Termination of patent right or utility model |