CN202005027U - Control circuit of charging indicating light - Google Patents
Control circuit of charging indicating light Download PDFInfo
- Publication number
- CN202005027U CN202005027U CN2011200538942U CN201120053894U CN202005027U CN 202005027 U CN202005027 U CN 202005027U CN 2011200538942 U CN2011200538942 U CN 2011200538942U CN 201120053894 U CN201120053894 U CN 201120053894U CN 202005027 U CN202005027 U CN 202005027U
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- control unit
- switch control
- resistance
- charging
- indicator light
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Abstract
The utility model discloses a control circuit of a charging indicating light, which comprises the charging indicating light, a cell, a first switch control unit, a second switch control unit and a third switch control unit. One end of the charging indicating light is connected with a charging chip of a mobile terminal, and the other end of the charging indicating light is connected with the first switch control unit. The charging chip is connected with the first switch control unit, the second switch control unit and the third switch control unit respectively, and the second switch control unit is connected with a baseband chip of the mobile terminal and earthed through a first resistance. The third switch control unit is connected with the baseband chip and connected with a power supply management chip of the mobile terminal through a second resistance, and the third switch control unit is earthed through a resistance of the cell. When the cell inserted in the mobile terminal is irregular, the voltage of the third switch control unit is 0V, thereby enabling a first switch control module to be in a close state and the charging indicating light not to be lighted, and a charging state of the mobile terminal is indicated correctly.
Description
Technical field
The utility model relates to charging indication technical field, particularly a kind of control circuit of charging indicator light of portable terminal.
Background technology
In the design of mobile phone, the function of charging indicator light has become one of household function of mobile phone, and the effect of charging indicator light is to tell user mobile phone to charge.In the design of traditional charging indicator light, plug charger and will light indicator light, no matter whether mobile phone is that charging indicator light can be lighted in charging always.
But mobile phone is in when charging, if the ID(Identity of battery, identity) pin is incorrect, and mobile phone can the automatic disconnection charging circuit, yet if do not close on the obvious circuit design of charging indicator light this moment unreasonablely, has misled the user easily.
Thereby prior art is still waiting to improve and improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of control circuit of charging indicator light, can control the charged state of the correct indicating mobile terminal of charging indicator light.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of control circuit of charging indicator light, this control circuit is used to control the illuminating state of the charging indicator light of portable terminal, it comprises charging indicator light and battery, it is characterized in that described control circuit comprises first switch control unit, second switch control unit and the 3rd switch control unit; One end of described charging indicator light is connected with the charging chip of portable terminal, and the other end is connected with first switch control unit; Described charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively; Described second switch control unit is connected with the GPIO port of the baseband chip of portable terminal, and by first grounding through resistance; Described the 3rd switch control unit is connected with the ADC_ID port of described baseband chip, and passes through the power management chip that second resistance connects portable terminal, and described the 3rd switch control unit is also by the grounding through resistance in the battery.
The control circuit of described charging indicator light, wherein, the resistance of described second resistance is less than the resistance of the resistance in the battery, and the voltage of this second resistance is less than the conducting voltage of the 3rd switch control unit.
The control circuit of described charging indicator light wherein, is serially connected with the 3rd resistance between the charging indicator light and first switch control unit.
The control circuit of described charging indicator light, wherein, charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively by the 4th resistance.
The control circuit of described charging indicator light, wherein, described first switch control unit and second switch control unit are metal-oxide-semiconductor.
The control circuit of described charging indicator light, wherein, described the 3rd switch control unit is a triode.
The control circuit of the charging indicator light that the utility model provides, it comprises first switch control unit, second switch control unit and the 3rd switch control unit; One end of described charging indicator light is connected with the charging chip of portable terminal, and the other end is connected with first switch control unit; Described charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively; Described second switch control unit is connected with the GPIO port of the baseband chip of portable terminal, and by first grounding through resistance; Described the 3rd switch control unit is connected with the ADC_ID port of described baseband chip, and the power management chip that connects portable terminal by second resistance, described the 3rd switch control unit is also by the grounding through resistance in the battery, when the battery in the portable terminal of packing into is illegal, making the voltage on the 3rd switch control unit is 0V, thereby making first switch control module is off state, thereby charging indicator light can't be lighted, correct indication the charged state of portable terminal, brought convenience to the user.
Description of drawings
Fig. 1 realizes the structured flowchart of the control circuit of the charging indicator light that example provides for the utility model.
Fig. 2 realizes the circuit theory diagrams of the control circuit of the charging indicator light that example provides for the utility model.
Embodiment
The utility model provides a kind of control circuit of charging indicator light, and is clearer, clear and definite for making the purpose of this utility model, technical scheme and effect, below with reference to accompanying drawing and give an actual example the utility model is further described.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The control circuit of the charging indicator light that the utility model embodiment provides is used to control the illuminating state of the charging indicator light of portable terminal, battery of mobile terminal pack into illegal, when cutting off the power supply or after being full of electricity, charge closing indicator light, thereby the charged state of correct indicating mobile terminal.This portable terminal comprises: portable type electronic products such as mobile phone, MP3, MP4.
See also Fig. 1 and Fig. 2, the control circuit of the charging indicator light that the utility model embodiment provides comprises charging indicator light, first switch control unit, second switch control unit and the 3rd switch control unit.Described portable terminal comprises battery BAT, and is provided with resistance R in the inside of battery BAT, and this battery BAT has BAT_ID detection pin.
Wherein, an end of described charging indicator light is connected with the VCHG port of the charging chip of portable terminal, and the other end is connected with first switch control unit.The VCHG port of described charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively, described second switch control unit is connected with the GPIO port of the baseband chip of portable terminal, and by first resistance R, 1 ground connection; Described the 3rd switch control unit is connected with the ADC_ID port of described baseband chip, and passes through the power management chip that second resistance R 2 connects portable terminals, and described the 3rd switch control unit is also by the grounding through resistance among the battery BAT.
When illegal, the control circuit of described charging indicator light can correctly be controlled the indicating status of charging indicator light in order to pack at portable terminal, and described second resistance R 2 need satisfy following two conditions with the relation of resistance R:
1) after the series connection of the battery BATR among second resistance R 2 and the battery BAT, can not make power management module produce bigger electric current, the resistance of the resistance R among general second resistance R 2 and the battery BAT is tens kilo-ohms a resistance;
2) resistance of described second resistance R 2 is less than the resistance of the resistance among the battery BAT, and the voltage of this second resistance R 2 is less than the conducting voltage of the 3rd switch control unit.
See also Fig. 2, in the specific implementation, between the charging indicator light and first switch control unit, be serially connected with the 3rd resistance R 3, the 3rd resistance R 3 is a current-limiting resistance, the size of regulating the 3rd resistance R 3 can obtain the different brightness of lamp, because the brightness of charging indicator light does not need real-time regulated, thus can be in advance as required brightness set the value of the 3rd resistance R 3.
The VCHG port of described charging chip also is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively by the 4th resistance R 4.Described charging chip is first switch control unit, second switch control unit and the 3rd switch control unit power supply by the 4th resistance R 4.
With the mobile phone is example, described first switch control unit and second switch control unit are respectively the first metal-oxide-semiconductor Q1(metal oxid semiconductor, mos field effect transistor) and the second metal-oxide-semiconductor Q2, described the 3rd switch control unit is triode Q3, and charging indicator light is light-emitting diode D1.In other embodiments, first switch control unit, second switch control unit and the 3rd switch control unit can also have the electronic component of switching function for other, as long as can satisfy the requirement of control circuit.
In the specific implementation, described charging indicator light connects the drain electrode of the first metal-oxide-semiconductor Q1 by the 3rd resistance R 3, the source ground of the first metal-oxide-semiconductor Q1, the VCHG port of described charging chip is connected with the grid of the first metal-oxide-semiconductor Q1, the drain electrode of the second metal-oxide-semiconductor Q2 and the collector electrode of triode Q3 respectively by the 4th resistance R 4.The source ground of the described second metal-oxide-semiconductor Q2, grid are connected on the GPIO port (General Purpose Input Output, general I/O) of mobile phone base band chip, and by first resistance R, 1 ground connection.The grounded emitter of triode Q3, its base stage is connected with the ADC_ID port of mobile phone base band chip, and by the AVDD port of second resistance R, 2 connection power management chips, the base stage of this triode Q3 also is connected with the BAT_ID pin of battery, again by the resistance R ground connection among the battery BAT.
Wherein, the GPIO port is one of a mobile phone base band chip control pin, and this GPIO port need be given tacit consent to and is output as low electricity, is low level to keep under the default conditions by first resistance R 1 with pulling down to, first resistance R 1 is a pull down resistor, and its resistance is generally selected 10K-100K ohm.The BAT_ID pin of battery BAT is one and detects pin, this pin is by moving power supply on second resistance R 2, and the magnitude of voltage that detects this pin of the ADC_ID port by baseband chip judges that this magnitude of voltage is whether in a certain setting voltage scope, present mobile phone is all used this pin usually and is judged whether battery BAT correctly is installed in the mobile phone when charging, and whether the battery BAT that installs is legal, can not turn-off charging circuit if the battery of installing conforms to the rule mobile phone.And the condition that the utility model is set legal battery BAT is that the magnitude of voltage that the ADC_ID port detects on the resistance R is the conducting voltage VBS3 less than triode Q3.So the value of second resistance R 2 and inside battery resistance R is provided with among Fig. 2 needs to satisfy two conditions: one, can not make the AVDD port of power management chip produce bigger electric current after the series connection of the resistance among second resistance R 2 and the battery BAT; Two, second resistance R 2 must be greater than resistance R, and the dividing potential drop that the AVDD port of power management chip produces on resistance R should be less than the conducting voltage VBS3 of triode Q3.
The operation principle of above-mentioned control circuit is: when charger inserts charger, be low level owing to be connected to the GPIO port of the second metal-oxide-semiconductor Q2 grid, thereby the second metal-oxide-semiconductor Q2 ends, if the battery BAT that pack in the mobile phone this moment is legal, mobile phone can begin charging; In addition because the base voltage of triode Q3 is not enough to satisfy the turn-on condition of triode Q3, thereby triode Q3 ends, this moment since the second metal-oxide-semiconductor Q2 and triode Q3 all end, then the grid voltage of the first metal-oxide-semiconductor Q1 is the voltage of the VCHG port of charging chip, the first metal-oxide-semiconductor Q1 conducting, charging indicator light LED1 is lighted.
When if charger inserts portable terminal, the battery BAT that packs in the mobile phone is illegal, be that the magnitude of voltage that detects on the resistance R among the battery BAT of the ADC_ID port of baseband chip is bigger, and greater than the conducting voltage VBS3 of triode Q3, mobile phone this moment can turn-off charging circuit, in addition since the voltage on the resistance R greater than VBS3, triode Q3 conducting, the grid voltage of the first metal-oxide-semiconductor Q1 is 0V during triode Q3 conducting, thereby the first metal-oxide-semiconductor Q1 ends, and charging indicator light extinguishes immediately.
When after battery BAT is full of electricity, needing the charge closing indicator light, only need GPIO port output high level by the software control baseband chip of mobile phone, the grid voltage of the second metal-oxide-semiconductor Q2 is greater than source voltage (because source electrode is connected to ground) at this moment, the then second metal-oxide-semiconductor Q2 conducting, the second metal-oxide-semiconductor Q2 conducting then grid voltage of the first metal-oxide-semiconductor Q1 is 0V, thereby first metal-oxide-semiconductor Q1 end, charging indicator light extinguishes immediately.
In sum, the control circuit of the charging indicator light that the utility model provides, when the battery in the portable terminal of packing into is illegal, making the voltage on the 3rd switch control unit is 0V, thereby making first switch control module is off state, thereby charging indicator light can't be lighted, correct indication the charged state of portable terminal, brought convenience to the user.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (6)
1. the control circuit of a charging indicator light, this control circuit is used to control the illuminating state of the charging indicator light of portable terminal, it comprises charging indicator light and battery, it is characterized in that described control circuit comprises first switch control unit, second switch control unit and the 3rd switch control unit;
One end of described charging indicator light is connected with the charging chip of portable terminal, and the other end is connected with first switch control unit;
Described charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively;
Described second switch control unit is connected with the GPIO port of the baseband chip of portable terminal, and by first grounding through resistance;
Described the 3rd switch control unit is connected with the ADC_ID port of described baseband chip, and passes through the power management chip that second resistance connects portable terminal, and described the 3rd switch control unit is also by the grounding through resistance in the battery.
2. the control circuit of charging indicator light as claimed in claim 1 is characterized in that, the resistance of described second resistance is less than the resistance of the resistance in the battery, and the voltage of this second resistance is less than the conducting voltage of the 3rd switch control unit.
3. the control circuit of charging indicator light as claimed in claim 1 is characterized in that, is serially connected with the 3rd resistance between the charging indicator light and first switch control unit.
4. the control circuit of charging indicator light as claimed in claim 1 is characterized in that, charging chip is connected with first switch control unit, second switch control unit and the 3rd switch control unit respectively by the 4th resistance.
5. as the control circuit of claim 1 or 4 described charging indicator lights, it is characterized in that described first switch control unit and second switch control unit are metal-oxide-semiconductor.
6. as the control circuit of claim 1 or 4 described charging indicator lights, it is characterized in that described the 3rd switch control unit is a triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200538942U CN202005027U (en) | 2011-03-03 | 2011-03-03 | Control circuit of charging indicating light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200538942U CN202005027U (en) | 2011-03-03 | 2011-03-03 | Control circuit of charging indicating light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202005027U true CN202005027U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200538942U Expired - Fee Related CN202005027U (en) | 2011-03-03 | 2011-03-03 | Control circuit of charging indicating light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202005027U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270275A (en) * | 2018-03-30 | 2018-07-10 | 上海创功通讯技术有限公司 | A kind of indicating circuit for being used to indicate charging process, method and terminal |
| CN109638912A (en) * | 2018-12-19 | 2019-04-16 | 努比亚技术有限公司 | A kind of charge indication means, terminal |
-
2011
- 2011-03-03 CN CN2011200538942U patent/CN202005027U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270275A (en) * | 2018-03-30 | 2018-07-10 | 上海创功通讯技术有限公司 | A kind of indicating circuit for being used to indicate charging process, method and terminal |
| CN109638912A (en) * | 2018-12-19 | 2019-04-16 | 努比亚技术有限公司 | A kind of charge indication means, terminal |
| CN109638912B (en) * | 2018-12-19 | 2022-07-26 | 努比亚技术有限公司 | Charging indicating device and terminal |
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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: 20111005 Termination date: 20140303 |