CN104079023A - Charging indicator lamp control circuit and charger - Google Patents
Charging indicator lamp control circuit and charger Download PDFInfo
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- CN104079023A CN104079023A CN201310109515.0A CN201310109515A CN104079023A CN 104079023 A CN104079023 A CN 104079023A CN 201310109515 A CN201310109515 A CN 201310109515A CN 104079023 A CN104079023 A CN 104079023A
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- resistance
- indicator light
- operational amplifier
- charging
- control circuit
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging indicator lamp control circuit. According to the charging indicator lamp control circuit, the input end of a voltage division circuit is connected with the input end of a negative pole; the voltage division circuit is connected with the in-phase end of an operational amplifier; one end of a first resistor is connected with the input end of a positive pole; the first resistor and a second resistor are connected into the operational amplifier after being connected in series; a cathode and the control end of a standard voltage stabilizer are connected between the first resistor and the second resistor; one end of a third resistor is connected with the inverted input end of the operational amplifier; the other end of the third resistor is connected with an anode of the standard voltage stabilizer; the output end of the operational amplifier is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected with one end of a first indicator lamp; one end of a fifth resistor is connected with the input end of the positive pole; the other end of the fifth resistor is connected with a collector of an audion; a base of the audion is connected with the output end of the operational amplifier through a sixth resistor; an emitter of the audion is grounded; one end of a second indicator lamp is connected between the fifth resistor and the collector of the audion. The invention further provides a charger which can accurately indicate the charging process.
Description
Technical field
The present invention relates to charging field, particularly relate to a kind of charging indicator light control circuit and charger.
Background technology
Along with the development of rechargeable battery, people more and more use rechargeable battery; In battery charging process, there is charging indicator light, for representing, currently charge, but because the sampling voltage in indicating lamp control circuit is unstable, make indicator light sometimes show inaccurate; Can cause battery charging abnormal, after indicator light changes sometimes, battery is not also full of, and breaks and carrys out power supply, stops charging and causes the electrical work time short; Or, indicator light fringe time evening, if indicator light fringe time is late, cause battery overcharge, shorten battery, and then reduction electrical equipment useful life.
Summary of the invention
The object of the invention is to propose a kind of charging indicator light control circuit and charger, can, to charging process, indicate accurately.
The scheme adopting:
A charging indicator light control circuit, comprising: electrode input end, negative input, bleeder circuit, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, benchmark pressurizer, operational amplifier, the first indicator light, the 5th resistance, the 6th resistance, triode and the second indicator light;
Wherein, the input of described bleeder circuit is connected with described negative input; The output of described bleeder circuit connects the in-phase input end of described operational amplifier;
One end of described the first resistance is connected with described electrode input end; The other end of described the first resistance accesses the inverting input of described operational amplifier after connecting with described the second resistance;
The negative electrode of described benchmark pressurizer and control end are connected between described the first resistance and the second resistance; The minus earth of described benchmark pressurizer; Described the 3rd one end of resistance and the inverting input of described operational amplifier are connected; The anodic bonding of the other end of described the 3rd resistance and described benchmark pressurizer; The cathode power supply end of described operational amplifier connects described electrode input end; The negative power supply end ground connection of described operational amplifier; The output of described operational amplifier connects one end of described the 4th resistance, and the other end of described the 4th resistance is connected with described first indicator light one end; The other end ground connection of described the first indicator light;
One end of described the 5th resistance connects described electrode input end; The other end of described the 5th resistance connects the collector electrode of described triode; The base stage of described triode connects the output of described operational amplifier by described the 6th resistance; The grounded emitter of described triode;
One end of described the second indicator light is connected between described the 5th resistance and the collector electrode of described triode; The other end ground connection of described the second indicator light.
And a kind of charger, comprising: charging module, charging indicator light control circuit as claimed in claim 1, wherein, the cathode output end of described charging module connects the electrode input end of described charging indicator light control circuit; The cathode output end of described charging module connects the negative input of described charging indicator light control circuit.
In the present invention, in when charging, by benchmark pressurizer, to the inverting input of operational amplifier, provide constant voltage; By bleeder circuit, obtain high voltage, the in-phase input end of input operational amplifier; Now, the current potential of in-phase input end is higher than inverting input, and operational amplifier output high level, makes the first indicator light bright, now charges representing; And the collector electrode of triode is now in low level, therefore the second indicator light does not work; When being full of electricity, charging current reduces, and now, the current potential of in-phase input end is lower than inverting input, operational amplifier output low level, and now the first indicator light does not work, and the collector electrode of triode, in high level, drives the second indicator light bright, has charged representing; Can indicate accurately charging process.
Accompanying drawing explanation
Fig. 1 is a structural representation of the charging indicator light control circuit that proposes of the present invention;
Fig. 2 is a structural representation of the charging indicator light control circuit that proposes of the present invention;
Fig. 3 is a structural representation of the charger that proposes of the present invention;
Fig. 4 is a concrete structure figure of the charger that proposes of the present invention.
Embodiment
The present invention proposes a kind of charging indicator light control circuit, its structural representation, with reference to shown in figure 1, comprising: electrode input end, negative input, bleeder circuit, the first resistance R 2, the second resistance R 6, the 3rd resistance R 7, the 4th resistance R 13, benchmark pressurizer U2, operational amplifier A 1, the first indicator light, the 5th resistance R 3, the 6th resistance R 9, triode Q1 and the second indicator light;
Wherein, the input of bleeder circuit is connected with negative input; The in-phase input end of the output concatenation operation amplifier A1 of bleeder circuit;
One end of the first resistance R 2 is connected with electrode input end; The other end of the first resistance R 2 accesses the inverting input of operational amplifier A 1 after connecting with the second resistance R 6;
The negative electrode of benchmark pressurizer U2 and control end are connected between the first resistance R 2 and the second resistance R 6; The minus earth of benchmark pressurizer U2; One end of the 3rd resistance R 7 is connected with the inverting input of operational amplifier A 1; The anodic bonding of the other end of the 3rd resistance R 7 and benchmark pressurizer U2; The cathode power supply end of operational amplifier A 1 connects electrode input end; The negative power supply end ground connection of operational amplifier A 1; The output of operational amplifier A 1 connects one end of the 4th resistance R 13, and the other end of the 4th resistance R 13 is connected with first indicator light one end; The other end ground connection of the first indicator light;
One end of the 5th resistance R 3 connects electrode input end; The collector electrode of the other end connecting triode Q1 of the 5th resistance R 3; The base stage of triode Q1 is by the output of the 6th resistance R 9 concatenation operation amplifier A1; The grounded emitter of triode Q1;
One end of the second indicator light is connected between the 5th resistance R 3 and the collector electrode of triode Q1; The other end ground connection of the second indicator light.
In the present invention, in when charging, by benchmark pressurizer, to the inverting input of operational amplifier, provide constant voltage; By bleeder circuit, obtain high voltage, the in-phase input end of input operational amplifier; Now, the current potential of in-phase input end is higher than inverting input, and operational amplifier output high level, makes the first indicator light bright, now charges representing; And the collector electrode of triode is now in low level, therefore the second indicator light does not work; When being full of electricity, charging current reduces, and now, the current potential of in-phase input end is lower than inverting input, operational amplifier output low level, and now the first indicator light does not work, and the collector electrode of triode, in high level, drives the second indicator light bright, has charged representing; Can indicate accurately charging process.
In one embodiment, bleeder circuit comprises the 7th resistance R 10, the 8th resistance R 11; The structural representation of another charging indicator light control circuit that the present invention proposes please refer to Fig. 2, and wherein, one end of the 7th resistance R 10 is connected with negative input; The other end of the 7th resistance R 10 connect with the 8th resistance R 11 after ground connection;
The in-phase input end of operational amplifier A 1 is connected between the 7th resistance R 10 and the 8th resistance R 11.
In the above-described embodiment, the first indicator light is light-emitting diode; The second indicator light is sent out as optical diode.
In order to distinguish more easily in charging and be still full of electricity, can select different the first indicator light of glow color and the second indicator light.For example, while giving a green light, represent to charge; While sending out a warning, represent to be full of electricity.Can also be the lamp of other colors, not limit herein.
The invention allows for a kind of charger, its structural representation can be with reference to figure 3,, comprising: charging module, charging indicator light control circuit as claimed in claim 1, wherein, the cathode output end of charging module connects the electrode input end of charging indicator light control circuit; The cathode output end of charging module connects the negative input of charging indicator light control circuit.
In the present invention, when utilizing charger to charge, by benchmark pressurizer, to the inverting input of operational amplifier, provide constant voltage; By bleeder circuit, obtain high voltage, the in-phase input end of input operational amplifier; Now, the current potential of in-phase input end is higher than inverting input, and operational amplifier output high level, makes the first indicator light bright, now charges representing; And the collector electrode of triode is now in low level, therefore the second indicator light does not work; When being full of electricity, charging current reduces, and now, the current potential of in-phase input end is lower than inverting input, operational amplifier output low level, and now the first indicator light does not work, and the collector electrode of triode, in high level, drives the second indicator light bright, has charged representing; Can indicate accurately charging process.
In one embodiment, bleeder circuit comprises the 7th resistance, the 8th resistance; Wherein, one end of the 7th resistance is connected with negative input; The other end of the 7th resistance connect with the 8th resistance after ground connection;
The in-phase input end of operational amplifier is connected between the 7th resistance and the 8th resistance.
In one embodiment, the first indicator light is light-emitting diode; The second indicator light is sent out as optical diode.
In one embodiment, in order to distinguish more easily in charging and be still full of electricity, can select different the first indicator light of glow color and the second indicator light.
As a concrete charger, please refer to Fig. 4, charging module is as shown in dotted line frame in Fig. 4, this charger comprises: F1 is fuse, and D1～D4, D5, D6 are rectifier diode, and C1, C2 are filter capacitor, R1～R13 is resistance, integrated control section, and T1 is switch transformer, U1 is optocoupler, U2, U3 are high-precision voltage stabilizing device 431, and A1 is transport and placing device, and BAT is rechargeable battery, Q1 is NPN triode, and LED is green, LED is red is indication light diode.
Operation principle: after civil power powers on, through D1～D4 rectification, C1 filtering, high-tension electricity is delivered to time polar circuit by transformer T1 step-down, by D5 rectification, C2 filtering, then access battery by D6.When cell voltage is during lower than full piezoelectric voltage, a point voltage is lower, and e point voltage is lower, not conducting of U3, and in optocoupler U1, diode does not have electric current to flow through, and optocoupler triode is closed, and control circuit does not have feedback signal, and charging circuit charges to battery always.
When large current charge, electric current flows through R4, and R4 both end voltage is high, and b point voltage is high; Through R8, R12 dividing potential drop, f point voltage is high, amplifier A1 high level, and g point is high level; Electric current flows through R13, LED is green, and d point is low level, and green LED is bright, and red led goes out, and represents that charger is in charged state.
Along with the carrying out of charging, cell voltage raises, and a point voltage also raises, corresponding e point voltage raises, U3 conducting, and three pipes in optocoupler U1 have electric current to flow through, integrated control section is accepted low level signal, and charging current reduces, and flows through the current reduction of R4, R4 both end voltage reduces, and b point voltage reduces, and f point voltage reduces, amplifier A1 output low level, LED is green to be extinguished, and LED is red to be lighted, and battery has charged.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a charging indicator light control circuit, it is characterized in that, comprising: electrode input end, negative input, bleeder circuit, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, benchmark pressurizer, operational amplifier, the first indicator light, the 5th resistance, the 6th resistance, triode and the second indicator light;
Wherein, the input of described bleeder circuit is connected with described negative input; The output of described bleeder circuit connects the in-phase input end of described operational amplifier;
One end of described the first resistance is connected with described electrode input end; The other end of described the first resistance accesses the inverting input of described operational amplifier after connecting with described the second resistance;
The negative electrode of described benchmark pressurizer and control end are connected between described the first resistance and the second resistance; The minus earth of described benchmark pressurizer; Described the 3rd one end of resistance and the inverting input of described operational amplifier are connected; The anodic bonding of the other end of described the 3rd resistance and described benchmark pressurizer; The cathode power supply end of described operational amplifier connects described electrode input end; The negative power supply end ground connection of described operational amplifier; The output of described operational amplifier connects one end of described the 4th resistance, and the other end of described the 4th resistance is connected with described first indicator light one end; The other end ground connection of described the first indicator light;
One end of described the 5th resistance connects described electrode input end; The other end of described the 5th resistance connects the collector electrode of described triode; The base stage of described triode connects the output of described operational amplifier by described the 6th resistance; The grounded emitter of described triode;
One end of described the second indicator light is connected between described the 5th resistance and the collector electrode of described triode; The other end ground connection of described the second indicator light.
2. charging indicator light control circuit according to claim 1, is characterized in that, described bleeder circuit comprises the 7th resistance, the 8th resistance;
Wherein, one end of described the 7th resistance is connected with described negative input; The other end of described the 7th resistance connect with described the 8th resistance after ground connection;
The in-phase input end of described operational amplifier is connected between described the 7th resistance and the 8th resistance.
3. charging indicator light control circuit according to claim 1, is characterized in that, described the first indicator light is light-emitting diode; Described the second indicator light is sent out as optical diode.
4. according to the charging indicator light control circuit described in claims 1 to 3 any one, it is characterized in that, described the first indicator light and described the second indicator light glow color are different.
5. a charger, is characterized in that, comprising: charging module, charging indicator light control circuit as claimed in claim 1, and wherein, the cathode output end of described charging module connects the electrode input end of described charging indicator light control circuit; The cathode output end of described charging module connects the negative input of described charging indicator light control circuit.
6. charger according to claim 5, is characterized in that, described bleeder circuit comprises the 7th resistance, the 8th resistance; Wherein, one end of described the 7th resistance is connected with described negative input; The other end of described the 7th resistance connect with described the 8th resistance after ground connection;
The in-phase input end of described operational amplifier is connected between described the 7th resistance and the 8th resistance.
7. charger according to claim 5, is characterized in that, described the first indicator light is light-emitting diode; Described the second indicator light is sent out as optical diode.
8. according to the charger described in claim 5 to 7 any one, it is characterized in that, described the first indicator light and described the second indicator light glow color are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109515.0A CN104079023B (en) | 2013-03-29 | 2013-03-29 | A kind of charging indicator light control circuit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109515.0A CN104079023B (en) | 2013-03-29 | 2013-03-29 | A kind of charging indicator light control circuit and charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104079023A true CN104079023A (en) | 2014-10-01 |
| CN104079023B CN104079023B (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310109515.0A Expired - Fee Related CN104079023B (en) | 2013-03-29 | 2013-03-29 | A kind of charging indicator light control circuit and charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332308A (en) * | 2017-07-18 | 2017-11-07 | 深圳市华星光电半导体显示技术有限公司 | Charging turns circuit for lamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076815U (en) * | 2011-05-17 | 2011-12-14 | 汪阳 | Charger |
| CN202167888U (en) * | 2011-07-21 | 2012-03-14 | 徐州市恒源电器有限公司 | Lithium battery charger |
| CN202171848U (en) * | 2011-08-16 | 2012-03-21 | 钱福明 | Charging type indicating rod |
| CN202353272U (en) * | 2011-12-15 | 2012-07-25 | 濮阳三友电器有限公司 | Saturation indicating circuit |
-
2013
- 2013-03-29 CN CN201310109515.0A patent/CN104079023B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076815U (en) * | 2011-05-17 | 2011-12-14 | 汪阳 | Charger |
| CN202167888U (en) * | 2011-07-21 | 2012-03-14 | 徐州市恒源电器有限公司 | Lithium battery charger |
| CN202171848U (en) * | 2011-08-16 | 2012-03-21 | 钱福明 | Charging type indicating rod |
| CN202353272U (en) * | 2011-12-15 | 2012-07-25 | 濮阳三友电器有限公司 | Saturation indicating circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332308A (en) * | 2017-07-18 | 2017-11-07 | 深圳市华星光电半导体显示技术有限公司 | Charging turns circuit for lamp |
| EP3657625A4 (en) * | 2017-07-18 | 2021-01-20 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Circuit for changing indicator lamp during charging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104079023B (en) | 2016-12-28 |
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Granted publication date: 20161228 Termination date: 20190329 |
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| CF01 | Termination of patent right due to non-payment of annual fee |