CN201226449Y - Voltage-boosting type charge control circuit and electronic device - Google Patents
Voltage-boosting type charge control circuit and electronic device Download PDFInfo
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- CN201226449Y CN201226449Y CNU2008200948860U CN200820094886U CN201226449Y CN 201226449 Y CN201226449 Y CN 201226449Y CN U2008200948860 U CNU2008200948860 U CN U2008200948860U CN 200820094886 U CN200820094886 U CN 200820094886U CN 201226449 Y CN201226449 Y CN 201226449Y
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Abstract
The utility model is applicable to the field of power supply, and provides a boosting-type charge control circuit. The boosting-type charge control circuit comprises a boosting-type change-over circuit, a voltage sampling circuit, a current feedback circuit, a power supply management circuit and a microcontroller. The power supply inlet end of the microcontroller is connected with the output end of the power supply management circuit. The voltage sampling end of the microcontroller is connected with the output end of the voltage sampling circuit; and the current feedback end of the microcontroller is connected with the output end of the current feedback circuit. The boosting-type charge control circuit adopts the microcontroller to precisely control the charging current output by the boosting-type change-over circuit so that electronic equipment and batteries are effectively protected, thus prolonging the service lives of the electric equipment and the batteries.
Description
Technical field
The utility model belongs to field of power supplies, relates in particular to a kind of booster type charging control circuit and electronic equipment.
Background technology
Along with popularizing of computer, increasing electronic equipment can charge by the 5V power supply that the USB interface of computer is exported, yet, can not satisfy the demand that various electronic equipments charge because the 5V power source voltage is too low, therefore a kind of booster type charging control circuit is used widely.
The modular structure figure of the booster type charging control circuit that Fig. 1 provides for prior art; Comprise: voltage up converting circuit 11, voltage sampling circuit 12, charging control circuit 13, boost conversion control circuit 14 and current feedback circuit 15; The input of voltage up converting circuit 11 is connected to the USB interface of computer; under the control of boost conversion control circuit 14 DC low-voltage of USB interface output is being charged through giving electronic equipment 10 after the boost conversion; simultaneously; the charged state of battery feeds back to boost conversion control circuit 14 in the electronic equipment 10 that charging control circuit 13 collects voltage sampling circuit 12; further control the size of charging current, thereby can effectively protect the battery in the electronic equipment 10 not to be damaged.Yet, the booster type charging control circuit that prior art provides is for the electronic equipment that is in abnormal conditions (on the low side because of the voltage that overdischarge causes such as battery), directly, damage electronic equipment and battery thereof easily, shortened the useful life of electronic equipment with bigger current charges.
The utility model content
The purpose of this utility model is to provide a kind of booster type charging control circuit, and the booster type charging control circuit that being intended to solve prior art provides can not effectively be protected electronic equipment, causes the short problem in useful life of electronic equipment.
The utility model is achieved in that a kind of booster type charging control circuit, and described booster type charging control circuit comprises:
Voltage up converting circuit carries out the DC low-voltage signal of importing to export to electronic equipment after the boost conversion;
Voltage sampling circuit, its input is connected with the output of described voltage up converting circuit, with the voltage signal feedback output of described voltage up converting circuit output;
Current feedback circuit, its input is connected with the output of described voltage up converting circuit, with the current signal feedback output of described voltage up converting circuit output;
Electric power management circuit carries out the DC low-voltage signal of importing to export after the voltage stabilizing; And
Microcontroller, its power input is connected to the output of described electric power management circuit; Its voltage sample end is connected to the output of described voltage sampling circuit, receives the feedback voltage signal of described voltage sampling circuit output, handles back output first control signal, controls the size of the charging current of described voltage up converting circuit output; Its current feedback terminal is connected to the output of described current feedback circuit, receives the feedback current signal of described current feedback circuit output, handles back output second control signal, controls the current value of charging current for setting of described voltage up converting circuit output.
Another purpose of the present utility model is to provide a kind of electronic equipment that adopts above-mentioned booster type charging control circuit charging.
The booster type charging control circuit that the utility model provides adopts the microprocessor controls voltage up converting circuit, state by battery in the voltage signal detected electrons equipment of voltage sampling circuit feedback, for the battery that is full of, in time turn-off charging current, and with little electric current boost charge; For the low battery of voltage, advanced line precharge, the voltage for the treatment of battery carry out large current charge again when rising to normal value; This accurate, intelligent control makes electronic equipment and battery obtain effective protection, thereby has prolonged the useful life of electronic equipment and battery thereof.
Description of drawings
Fig. 1 is the modular structure figure of the booster type charging control circuit that provides of prior art;
Fig. 2 is the modular structure figure of the booster type charging control circuit that provides of the utility model embodiment;
Fig. 3 is the circuit diagram of the booster type charging control circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.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 booster type charging control circuit that the utility model embodiment provides is by the state of battery in the detected electrons equipment and the feedback of charging current; size by the charging current of microprocessor controls voltage up converting circuit output makes electronic equipment and battery obtain effective protection.
The booster type charging control circuit that the utility model embodiment provides is mainly used in the electronic equipment to be charged, and its modular structure for convenience of explanation, only shows the part relevant with the utility model as shown in Figure 2, and details are as follows.
The booster type charging control circuit comprises: electric power management circuit 21, voltage up converting circuit 22, voltage sampling circuit 23, current feedback circuit 24 and microcontroller 25; Wherein, the input of electric power management circuit 21 and voltage up converting circuit 22 all is connected with the USB interface of computer, and electric power management circuit 21 will carry out exporting to microcontroller 25 after the voltage stabilizing from the DC low-voltage of USB interface output, for microcontroller 25 provides operating voltage; To after carrying out boost conversion, the DC low-voltage of USB interface output give electronic equipment 10 chargings at voltage up converting circuit 22 under the control of microcontroller 25.
The input of voltage sampling circuit 23 is connected with the output of voltage up converting circuit 22, with the voltage signal feedback output of voltage up converting circuit 22 outputs.
The input of current feedback circuit 24 is connected with the output of voltage up converting circuit 22, with the current signal feedback output of voltage up converting circuit 22 outputs.
The power input of microcontroller 25 is connected to the output of electric power management circuit 21, receives the voltage signal of electric power management circuit 21 outputs; Its voltage sample end is connected to the output of voltage sampling circuit 23, receives the feedback voltage signal of voltage sampling circuit 23 outputs, handles back output first control signal, and the size of the charging current of control voltage up converting circuit 22 outputs; Its current feedback terminal is connected to the output of current feedback circuit 24; the feedback current signal of received current feedback circuit 24 outputs; handle back output second control signal; and the current value of charging current for setting of control voltage up converting circuit 22 outputs; thereby take constant current charge, more effective protection electronic equipment 10.
Fig. 3 shows the circuit diagram of the booster type charging control circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and existing details are as follows in conjunction with Fig. 2.
Electric power management circuit 21 carries out exporting to microcontroller 25 after voltage stabilizing is handled with the DC low-voltage of input provides operating voltage; Under the control of microcontroller 25, voltage up converting circuit 22 carries out the DC low-voltage of input to give electronic equipment 10 chargings after the boost conversion; Give microcontroller 25 by voltage sampling circuit 23 with the state feedback of battery in the electronic equipment 10, microcontroller 25 is controlled the size of the charging current of voltage up converting circuit 22 outputs by the state of judging battery in the electronic equipment 10; By current feedback circuit 24 size of charging current is fed back to microcontroller 25 again, be in the value that sets all the time by the charging current of microcontroller 25 control voltage up converting circuit 22 outputs, i.e. constant current charge, protection electronic equipment 10 is not burnt out.
Wherein, microcontroller 25 comprises 20 pins; Its 1 pin ground connection; Be connected with a calibrating resistance R1 between its frequency calibration end 2 pin and 3 pin; Its reset terminal 4 pin are connected with a reset circuit 251; It shows that control end 7,8 pin are connected with a display circuit 252; Its output 13 pin are connected to the control end of voltage up converting circuit 22; Its current feedback terminal 14 pin are connected to the output of current feedback circuit 24; Its voltage sample end 17 is connected to the output of voltage sampling circuit 23; Its power output end 20 pin are connected with a filter capacitor C1; Other pin 5,6,9,10,11,12,15,16,18,19 is all unsettled not to be connect.
As an embodiment of the present utility model, reset circuit 251 comprises resistance R 2 and capacitor C 2, and an end of capacitor C 2 is connected to power input 20 pin of microcontroller 25 by resistance R 2, also is connected to reset terminal 4 pin of microcontroller; Other end ground connection.
As another embodiment of the present utility model, display circuit 252 comprises that (Light Emitting Diode, LED), LED is connected to the demonstration control end of microcontroller 25 at least one light-emitting diode by resistance.There is shown two LED, wherein the end of LED1 is connected to demonstration control end 7 pin of microcontroller 25, other end ground connection by resistance R 3; The end of LED2 is connected to demonstration control end 8 pin of microcontroller 25, other end ground connection by resistance R 4.
In the utility model embodiment, voltage up converting circuit 22 comprises: energy-storage travelling wave tube, the first triode Q1 of control energy-storage travelling wave tube work and the second triode Q2 that drives the first triode Q1 operating state; Wherein, energy-storage travelling wave tube is connected between the input and output of voltage up converting circuit 22, and the base stage of the first triode Q1 is connected to the input of voltage up converting circuit 22, and its collector electrode is connected to the output of voltage up converting circuit 22, its grounded emitter; The base stage of the second triode Q2 is connected to the output of microcontroller 25, and collector electrode is connected to the base stage of the first triode Q1, grounded emitter.As an embodiment of the present utility model, energy-storage travelling wave tube comprises diode D1 and inductance L 1, and diode D1 and inductance L 1 are connected between the input and output of voltage up converting circuit 22.
As an embodiment of the present utility model, voltage up converting circuit 22 also comprises resistance R 5, R6, R7 and capacitor C 3; One end of resistance R 5 is connected to the base stage of the first triode Q1, and the other end is by capacitor C 3 ground connection; One end of resistance R 6 is connected to the base stage of the second triode Q2, and the other end is connected to output 13 pin of microcontroller; One end of resistance R 7 is connected to the base stage of the second triode Q2, other end ground connection.
In the utility model embodiment, voltage sampling circuit 23 comprises resistance R 8, R9, R10 and capacitor C 4, one end of resistance R 8 is connected to the output of voltage up converting circuit 22, and the other end is by resistance R 9 ground connection, and the other end also is connected to voltage sample end 17 pin of microcontroller by resistance R 10; One end of capacitor C 4 is connected to voltage sample end 17 pin of microcontroller, other end ground connection.
In the utility model embodiment, current feedback circuit 24 comprises resistance R 11, R12 and capacitor C 5, and an end of capacitor C 5 is connected to current feedback terminal 14 pin of microcontroller, also is connected to the output of voltage up converting circuit 22 by resistance R 11, other end ground connection; One end of resistance R 12 is connected to the output of voltage up converting circuit 22, other end ground connection.
In the utility model embodiment, electric power management circuit 21 comprises the 3rd triode Q3, pressurizer U1, first capacitor C 6 and first resistance R 13, second resistance R 14, the 3rd resistance R 15, the 4th resistance R 16; The output 1 of pressurizer U1 is connected to the base stage of the 3rd triode Q3, its input 2 ground connection, it adjusts end 3 by the 4th resistance R 16 ground connection, it adjusts end 3 also is connected to the 3rd triode Q3 by the 3rd resistance R 15 emitter, and it adjusts end 3 also is connected to the 3rd triode Q3 by first capacitor C 6, second resistance R 14 collector electrode; The collector electrode of the 3rd triode Q3 also is connected to the input of voltage up converting circuit 22 by first resistance R 13, its emitter is connected to power input 20 pin of microcontroller 25.As an embodiment of the present utility model, electric power management circuit 21 comprises that also the emitter of capacitor C 7, the three triode Q3 is also by these capacitor C 7 ground connection.
The operation principle of the booster type charging control circuit that the utility model embodiment provides is described below: electric power management circuit 21 carries out voltage stabilizing with the DC low-voltage of input and handles back output, operating voltage is provided for microcontroller 25; Microcontroller 25 is started working, and under the control of portion's clock, microcontroller 25 receives the feedback voltage signal of voltage sampling circuit 23 outputs earlier within it, handles back output first control signal, and the size of the charging current of control voltage up converting circuit 22 outputs; Then, microcontroller 25 is the feedback current signal of received current feedback circuit 24 outputs again, handle back output second control signal, and the current value of charging current for setting of control voltage up converting circuit 22 outputs, thereby take constant current to the battery charge in the electronic equipment 10, and indicate by the LED in the display circuit 252.
When microcontroller 25 is started working, sample by the voltage of battery in 23 pairs of electronic equipments 10 of voltage sampling circuit earlier, judge the state of battery by sampled voltage: (1) does not have battery if detect, microcontroller 25 is not exported control signal, then voltage up converting circuit 22 is not exported charging current, and the indicating status of display circuit 252 is not for there being battery simultaneously; (2) be lower than 1V if detect the voltage of battery, microcontroller 25 outputs first control signal control voltage up converting circuit 22 is exported the small-pulse effect electric currents, and battery is carried out precharge, and is normal until the voltage recovery of battery; Because the voltage of normal battery is greater than 1V, if battery is long by overdischarge or resting period, then voltage will be less than 1V, and the battery of this moment is if the use large current charge can damage battery even cause danger, therefore need to adopt the small-pulse effect pre-charge, with the voltage charging of battery to greater than 1V; (3) normal if detect the voltage of battery, microcontroller 25 outputs first control signal control voltage up converting circuit 22 output large current charges, the indicating status of display circuit 252 is for charging normal simultaneously.When battery was full of, microcontroller 25 was adjusted the control signal of output, control voltage up converting circuit 22 output boost charge electric currents, and the indicating status of display circuit 252 is for being full of simultaneously.
When the voltage of voltage sampling circuit 23 sampling satisfied following any one condition, microcontroller 25 was controlled voltage up converting circuit 22 and is not exported charging current, complete charge.Condition 1: the voltage of battery reaches the maximum of setting; Condition 2: the charging interval reaches the maximum of setting; Condition 3: the voltage of battery or charging interval reach the limit value of setting according to battery behavior; Condition 4: the negative variable quantity of cell voltage has reached set point; Wherein set point is to set according to the joint number of battery.
In the process of charging; current feedback circuit 24 feeds back to microcontroller 25 with the charging current of voltage up converting circuit 22 outputs; microcontroller 25 is according to the duty ratio of second control signal of the charging current modulation output of feedback; thereby the current value of charging current for setting of control voltage up converting circuit 22 outputs; be constant current charge, protection electronic equipment 10 and battery thereof are not damaged.
The booster type charging control circuit that the utility model embodiment provides adopts the microprocessor controls voltage up converting circuit, state by battery in the voltage signal detected electrons equipment of voltage sampling circuit feedback, for the battery that is full of, in time turn-off charging current, and with little electric current boost charge; For the low battery of voltage, advanced line precharge, the voltage for the treatment of battery carry out large current charge again when rising to normal value; This accurate, intelligent control makes electronic equipment and battery obtain effective protection, thereby has prolonged the useful life of electronic equipment and battery thereof; Saved circuit cost simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1, a kind of booster type charging control circuit is characterized in that, described booster type charging control circuit comprises:
Voltage up converting circuit carries out the DC low-voltage signal of importing to export to electronic equipment after the boost conversion;
Voltage sampling circuit, its input is connected with the output of described voltage up converting circuit, with the voltage signal feedback output of described voltage up converting circuit output;
Current feedback circuit, its input is connected with the output of described voltage up converting circuit, with the current signal feedback output of described voltage up converting circuit output;
Electric power management circuit carries out the DC low-voltage signal of importing to export after the voltage stabilizing; And
Microcontroller, its power input is connected to the output of described electric power management circuit; Its voltage sample end is connected to the output of described voltage sampling circuit, receives the feedback voltage signal of described voltage sampling circuit output, handles back output first control signal, controls the size of the charging current of described voltage up converting circuit output; Its current feedback terminal is connected to the output of described current feedback circuit, receives the feedback current signal of described current feedback circuit output, handles back output second control signal, controls the current value of charging current for setting of described voltage up converting circuit output.
2, booster type charging control circuit as claimed in claim 1 is characterized in that, described voltage up converting circuit comprises:
Energy-storage travelling wave tube;
Control first triode of described energy-storage travelling wave tube work; And
Control second triode of the described first triode operating state;
Described energy-storage travelling wave tube is connected between the input and output of described voltage up converting circuit, and the base stage of described first triode is connected to the input of described voltage up converting circuit, and its collector electrode is connected to the output of described voltage up converting circuit, its grounded emitter;
The base stage of described second triode is connected to the output of described microcontroller, and collector electrode is connected to the base stage of described first triode, grounded emitter.
3, booster type charging control circuit as claimed in claim 1 is characterized in that, the reset terminal of described microcontroller connects a reset circuit.
4, booster type charging control circuit as claimed in claim 1 is characterized in that, the frequency calibration end of described microcontroller connects a calibrating resistance.
5, booster type charging control circuit as claimed in claim 1 is characterized in that, the power input of described microcontroller connects a filter capacitor.
6, booster type charging control circuit as claimed in claim 1 is characterized in that, the demonstration control end of described microcontroller connects a display circuit.
7, booster type charging control circuit as claimed in claim 6 is characterized in that, described display circuit comprises at least one LED, and described LED is electrically connected to the demonstration control end of described microcontroller.
8, booster type charging control circuit as claimed in claim 1 is characterized in that, described electric power management circuit comprises:
The 3rd triode, pressurizer, first electric capacity and first resistance, second resistance, the 3rd resistance, the 4th resistance;
The output of described pressurizer is connected to the base stage of described the 3rd triode, its input end grounding, it adjusts end by described the 4th grounding through resistance, it adjusts end also is connected to described the 3rd triode by described the 3rd resistance emitter, and it adjusts end also is connected to described the 3rd triode by described first electric capacity, described second resistance collector electrode;
The collector electrode of described the 3rd triode also is connected to the input of described voltage up converting circuit by described first resistance, its emitter is connected to the power input of described microcontroller.
9, booster type charging control circuit as claimed in claim 8 is characterized in that, the emitter of described the 3rd triode is by a capacity earth.
10, a kind of electronic equipment that adopts the booster type charging control circuit charging of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200948860U CN201226449Y (en) | 2008-06-16 | 2008-06-16 | Voltage-boosting type charge control circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200948860U CN201226449Y (en) | 2008-06-16 | 2008-06-16 | Voltage-boosting type charge control circuit and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN201226449Y true CN201226449Y (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200948860U Expired - Fee Related CN201226449Y (en) | 2008-06-16 | 2008-06-16 | Voltage-boosting type charge control circuit and electronic device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101835312A (en) * | 2010-05-10 | 2010-09-15 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN103066666A (en) * | 2013-01-22 | 2013-04-24 | 矽力杰半导体技术(杭州)有限公司 | Boost type battery charging management system and control method thereof |
| CN105990879A (en) * | 2016-07-06 | 2016-10-05 | 歌尔股份有限公司 | Device for battery charging and electronic device |
| CN106411126A (en) * | 2016-11-28 | 2017-02-15 | 扬州工业职业技术学院 | Portable laser boost power supply drive module |
-
2008
- 2008-06-16 CN CNU2008200948860U patent/CN201226449Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101720148B (en) * | 2009-07-21 | 2013-10-09 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101835312A (en) * | 2010-05-10 | 2010-09-15 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN101835312B (en) * | 2010-05-10 | 2014-03-26 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN103066666A (en) * | 2013-01-22 | 2013-04-24 | 矽力杰半导体技术(杭州)有限公司 | Boost type battery charging management system and control method thereof |
| TWI492483B (en) * | 2013-01-22 | 2015-07-11 | Silergy Corp | Step - up battery charge management system and its control method |
| CN103066666B (en) * | 2013-01-22 | 2015-08-26 | 矽力杰半导体技术(杭州)有限公司 | A kind of booster type battery charging management system and control method thereof |
| US9391467B2 (en) | 2013-01-22 | 2016-07-12 | Silergy Semiconductor Technology (Hangzhou) Ltd | Step-up battery charging management system and control method thereof |
| CN105990879A (en) * | 2016-07-06 | 2016-10-05 | 歌尔股份有限公司 | Device for battery charging and electronic device |
| CN106411126A (en) * | 2016-11-28 | 2017-02-15 | 扬州工业职业技术学院 | Portable laser boost power supply drive module |
| CN106411126B (en) * | 2016-11-28 | 2018-12-25 | 扬州工业职业技术学院 | A kind of portable laser booster power drive module |
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| Date | Code | Title | Description |
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| 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: 20090422 Termination date: 20160616 |
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| CF01 | Termination of patent right due to non-payment of annual fee |