CN202696244U - Charging circuit of multifunctional charger - Google Patents
Charging circuit of multifunctional charger Download PDFInfo
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- CN202696244U CN202696244U CN 201220411848 CN201220411848U CN202696244U CN 202696244 U CN202696244 U CN 202696244U CN 201220411848 CN201220411848 CN 201220411848 CN 201220411848 U CN201220411848 U CN 201220411848U CN 202696244 U CN202696244 U CN 202696244U
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Abstract
The utility model relates to a charging circuit of a multifunctional charger. The charging circuit comprises a four operational amplifier integrated circuit, a first resistor, a second resistor, a three terminal adjustable shunt with the type of TL431, an adjustable resistor, a third resistor, a first red LED lamp, a first triode, a switch valve seat, a diode, a fourth resistor, a second triode, and a fifth resistor. One ends of the first resistor and the second resistor are connected with the anode of the power supply of the four operational amplifier integrated circuit; the cathode of the three terminal adjustable shunt with the type of TL431 is connected with the other end of the first resistor; the adjustable resistor is arranged between the cathode and the control electrode of the three terminal adjustable shunt; the third resistor is arranged between the control electrode and the anode of the three terminal adjustable shunt; the anode of the first red LED lamp is connected with the other end of the second resistor; the collector electrode of the first triode is connected with the cathode of the first red LED lamp; the normally open contact of the switch valve seat is connected with the base electrode of the first triode; the cathode of the diode is connected with the normally closed contact of the switch valve seat; one end of the fourth resistor is connected with the anode of the diode; the collector electrode of the second triode is connected with the other end of the fourth resistor; and one end of the fifth resistor is connected with the base electrode of the second triode.
Description
Technical field
The utility model relates to a kind of charging circuit of multifunctional charger.
Background technology
The fast development of electronic technology so that various electronic product all towards portable and future development miniaturization and, also so that more electrified product adopts the electric power system based on battery.At present, the battery of more use has NI-G, ni-mh, lead accumulator and lithium battery.Their features has determined that they will coexistence development within quite long period.Because the charge characteristic of dissimilar battery is different, usually to dissimilar, the battery of even not same voltage, capacitance grade uses different chargers, but this has inconvenience in actual use.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple in structure, charging circuit of being applicable to the multifunctional charger of various batteries charging.
In order to address the above problem, the utility model provides a kind of charging circuit of multifunctional charger, comprising: the four high guaily unit integrated circuit, the first resistance and the second resistance that one end links to each other with the positive source of four high guaily unit integrated circuit, the three end adjustable shunt devices (model is TL431) that negative electrode links to each other with the first resistance other end, be located at the adjustable resistance between this three ends adjustable shunt device negative electrode and the control utmost point, be located at the 3rd resistance between this three ends adjustable shunt device control utmost point and the anode, the first red LED lamp that anode is connected with the other end of the second resistance, the first triode that collector electrode links to each other with the negative electrode of the first red LED lamp, the switch valve seat that normally opened contact links to each other with the base stage of the first triode, the diode that negative electrode links to each other with the normally-closed contact of switch valve seat, the 4th resistance that one end links to each other with the anode of diode, the second triode that collector electrode links to each other with the other end of the 4th resistance, the 5th resistance that one end links to each other with the base stage of the second triode.
The output of the other end four high guaily unit integrated circuit of the 5th resistance and an end of the 6th resistance link to each other, the other end of the 6th resistance links to each other with the base stage of the 3rd triode, the collector electrode of the 3rd triode links to each other with the negative electrode of the second red LED lamp, the anode of the second red LED lamp links to each other with an end of the 7th resistance, and the other end of the 7th resistance links to each other with the collector electrode of the 3rd triode and the cathode power supply end of four high guaily unit integrated circuit.
Be provided with the 8th resistance between described the second transistor base and the emitter.
String is provided with the 8th resistance and green LED lamp between the cathode power supply end of described four high guaily unit integrated circuit and the output.
Also be connected with the 9th resistance between the positive level power supply end of described four high guaily unit integrated circuit and the second triode.
Described switch valve also links to each other with the in-phase input end of four high guaily unit integrated circuit.
The utility model has positive effect with respect to prior art: the charging circuit of multifunctional charger of the present utility model utilizes the battery voltage monitoring reference circuit to regulate the size of charging voltage, so that this charging circuit can be various dissimilar battery chargings.During work, three end adjustable shunt devices link to each other with resistance and produce reference voltage, and are input to the reverse input end of four high guaily unit integrated circuit.The in the same way input that cell voltage then is input to.When beginning to charge, because cell voltage is lower, therefore input is lower than reverse input end to voltage in the same way.Four high guaily unit integrated circuit output low level, green LED lamp is lighted, and indication is charged.Simultaneously the second triode conducting, power supply charges to battery through triode, current-limiting resistance and isolating diode.Battery is in charging process, and voltage progressively raises, and when voltage rose to a little more than input terminal voltage in the same way, the high point of four high guaily unit integrated circuit output was flat.The cut-off of the second triode, the green LED lamp of indicator light extinguishes, and power supply stops charging.The high level of four high guaily unit integrated circuit output makes the 3rd triode conducting, and red LED lamp is lighted.But charging stops rear cell voltage and can descend again, when being lower than reverse input end voltage, and four high guaily unit integrated circuit output low level.To the battery charging, when cell voltage raise again, the four high guaily unit integrated circuit is output low level again again for power supply, and power supply stops the charging to battery.So circulation is gone down, and has just formed the pulse current charge to battery.Charging current reduces gradually, and green LED lamp is gradually dimmed, and red LED lamp brightens gradually, and finishing rate is reduced to trickle charge (several milliamperes to tens milliamperes) state.
Description of drawings
For content of the present utility model is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein:
Fig. 1 is the structure chart of the charging circuit of multifunctional charger of the present utility model.
Embodiment
See Fig. 1, the charging circuit of the multifunctional charger that the present embodiment provides comprises: four high guaily unit integrated circuit LM324, the first resistance R 13 and the second resistance R 22 that one end links to each other with the positive source of four high guaily unit integrated circuit LM324, the three end adjustable shunt device U4(models that negative electrode links to each other with the first resistance R 13 other ends are TL431), be located at the adjustable resistance RV2 between this three ends adjustable shunt device U4 negative electrode and the control utmost point, be located at the 3rd resistance R 14 between this three ends adjustable shunt device U4 control utmost point and the anode, the first red LED lamp D14 that anode is connected with the other end of the second resistance R 22, the first triode Q6 that collector electrode links to each other with the negative electrode of the first red LED lamp D14, the switch valve seat SW2 that normally opened contact links to each other with the base stage of the first triode Q6, the diode D11 that negative electrode links to each other with the normally-closed contact of switch valve seat SW2, the 4th resistance R 21 that one end links to each other with the anode of diode D11, the second triode Q4 that collector electrode links to each other with the other end of the 4th resistance R 21, the 5th resistance R 17 that one end links to each other with the base stage of the second triode Q4;
The output of the other end four high guaily unit integrated circuit LM324 of the 5th resistance R 17 and an end of the 6th resistance R 18 link to each other, the other end of the 6th resistance R 18 links to each other with the base stage of the 3rd triode Q5, the collector electrode of the 3rd triode Q5 links to each other with the negative electrode of the second red LED lamp D13, the anode of the second red LED lamp D13 links to each other with an end of the 7th resistance R 20, and the other end of the 7th resistance R 20 links to each other with the collector electrode of the 3rd triode Q5 and the cathode power supply end of four high guaily unit integrated circuit LM324.
Be provided with the 8th resistance R 19 between described the second triode Q5 base stage and the emitter.
String is provided with the 8th resistance R 16 and green LED lamp D12 between the cathode power supply end of described four high guaily unit integrated circuit LM324 and the output.
Also be connected with the 9th resistance R 15 between the positive level power supply end of described four high guaily unit integrated circuit LM324 and the second triode Q4.
Described switch valve SW2 also links to each other with the in-phase input end of four high guaily unit integrated circuit LM324.
During work, three end adjustable shunt device U4 link to each other with resistance and produce reference voltage, and are input to the reverse input end of four high guaily unit integrated circuit LM324.Cell voltage then is input to the in the same way input of LM324.When beginning to charge, because cell voltage is lower, therefore input is lower than reverse input end to voltage in the same way.Four high guaily unit integrated circuit output low level, green LED lamp is lighted, and indication is charged.Simultaneously the second triode Q4 conducting, power supply charges to battery through triode, current-limiting resistance R21 and isolating diode D11.Battery is in charging process, and voltage progressively raises, and when voltage rose to a little more than input terminal voltage in the same way, the high point of four high guaily unit integrated circuit LM324 output was flat.The second triode Q4 cut-off, the green LED lamp of indicator light extinguishes, and power supply stops charging.The high level of four high guaily unit integrated circuit LM324 output makes the 3rd triode Q5 conducting, and red LED lamp is lighted.But charging stops rear cell voltage and can descend again, when being lower than reverse input end voltage, and four high guaily unit integrated circuit LM324 output low level.To the battery charging, when cell voltage raise again, four high guaily unit integrated circuit LM324 is output low level again again for power supply, and power supply stops the charging to battery.So circulation is gone down, and has just formed the pulse current charge to battery.Charging current reduces gradually, and green LED lamp is gradually dimmed, and red LED lamp brightens gradually, and finishing rate is reduced to trickle charge (several milliamperes to tens milliamperes) state.
Obviously, above-described embodiment only is for the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (5)
1. the charging circuit of a multifunctional charger is characterized in that comprising: the four high guaily unit integrated circuit, the first resistance and the second resistance that one end links to each other with the positive source of four high guaily unit integrated circuit, the three end adjustable shunt devices that negative electrode links to each other with the first resistance other end, be located at the adjustable resistance between this three ends adjustable shunt device negative electrode and the control utmost point, be located at the 3rd resistance between this three ends adjustable shunt device control utmost point and the anode, the first red LED lamp that anode is connected with the other end of the second resistance, the first triode that collector electrode links to each other with the negative electrode of the first red LED lamp, the switch valve seat that normally opened contact links to each other with the base stage of the first triode, the diode that negative electrode links to each other with the normally-closed contact of switch valve seat, the 4th resistance that one end links to each other with the anode of diode, the second triode that collector electrode links to each other with the other end of the 4th resistance, the 5th resistance that one end links to each other with the base stage of the second triode.
2. the charging circuit of multifunctional charger according to claim 1, it is characterized in that: the output of the other end four high guaily unit integrated circuit of the 5th resistance is connected with an end of the 6th resistance, the other end of the 6th resistance is connected with the base stage of the 3rd triode, the colelctor electrode of the 3rd triode is connected with the negative electrode of the second red LED lamp, the anode of the second red LED lamp is connected with an end of the 7th resistance, the other end of the 7th resistance is connected with the colelctor electrode of the 3rd triode and the cathode power supply end of four high guaily unit integrated circuit
Be provided with the 8th resistance between described the second transistor base and the emitter.
3. the charging circuit of multifunctional charger according to claim 1 and 2 is characterized in that: go here and there between the cathode power supply end of described four high guaily unit integrated circuit and the output and be provided with the 8th resistance and green LED lamp.
4. the charging circuit of multifunctional charger according to claim 3 is characterized in that: also be connected with the 9th resistance between the positive level power supply end of described four high guaily unit integrated circuit and the second triode.
5. the charging circuit of multifunctional charger according to claim 4, it is characterized in that: described switch valve also links to each other with the in-phase input end of four high guaily unit integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220411848 CN202696244U (en) | 2012-08-20 | 2012-08-20 | Charging circuit of multifunctional charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220411848 CN202696244U (en) | 2012-08-20 | 2012-08-20 | Charging circuit of multifunctional charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696244U true CN202696244U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220411848 Expired - Fee Related CN202696244U (en) | 2012-08-20 | 2012-08-20 | Charging circuit of multifunctional charger |
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| CN (1) | CN202696244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184112A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Input under-voltage detection circuit |
-
2012
- 2012-08-20 CN CN 201220411848 patent/CN202696244U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184112A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Input under-voltage detection circuit |
| CN104184112B (en) * | 2013-05-27 | 2017-11-21 | 深圳市海洋王照明工程有限公司 | A kind of input undervoltage detects circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 213000 Hohai University, Changzhou campus, Xinbei District, Jiangsu, Changzhou Patentee after: Hao Minglong Address before: Room 2, unit 4, building 135, building 201, Fuzhou Road 330000, East Lake District, Nanchang, Jiangxi Patentee before: Hao Minglong |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130820 |