CN104836316B - A kind of constant-current charging circuit of adjustable current - Google Patents
A kind of constant-current charging circuit of adjustable current Download PDFInfo
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- CN104836316B CN104836316B CN201510207910.1A CN201510207910A CN104836316B CN 104836316 B CN104836316 B CN 104836316B CN 201510207910 A CN201510207910 A CN 201510207910A CN 104836316 B CN104836316 B CN 104836316B
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Abstract
The invention discloses a kind of constant-current charging circuit of adjustable current, including transformer, the output end of transformer is connected with the input of rectifier bridge, the positive output end of rectifier bridge is connected with one end of current-limiting resistance, the other end of the current-limiting resistance positive pole with the first voltage-regulator diode respectively, one end of selecting switch is connected, the negative pole of first voltage-regulator diode is connected with the positive pole of the second voltage-regulator diode, the negative pole of second voltage-regulator diode is connected to the ground by resistance, the negative pole of second voltage-regulator diode is also connected by resistance with the base stage of triode, one end of the external first resistor of the other end or one end of second resistance of selecting switch, the other end of first resistor, the other end of second resistance is connected with the emitter stage of triode, positive charging end of the colelctor electrode of triode as battery.Circuit of the present invention is simple, and cost is cheap, is easy to produce in batches, moreover, charging current can be adjusted, it is easy to use, have a good application prospect.
Description
Technical field
The present invention relates to a kind of constant-current charging circuit of adjustable current, belong to electronic circuit technology field.
Background technology
At present, existing charging circuit on the market, circuit is more complicated, and for electronic component using more, cost is higher, and
And battery is charged using constant-current source, and charging current can not be adjusted, in-convenience in use.
The content of the invention
The invention aims to overcome existing charging circuit on the market, circuit is more complicated, and electronic component uses
More, cost is higher, and battery is charged using constant-current source, and can not adjust charging current, in-convenience in use
The problem of.The constant-current charging circuit of the adjustable current of the present invention, circuit is simple, and cost is cheap, is easy to produce in batches, moreover,
Charging current can be adjusted, selectivity is strong, widely applicable, easy to use, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of constant-current charging circuit of adjustable current, it is characterised in that：Including transformer T, rectifier bridge D, current-limiting resistance
R1, the first voltage-regulator diode D1, the second voltage-regulator diode D2, triode Q1, first resistor R2, second resistance R3 and selecting switch
S, the transformer the T external civil power of input, the output end of the transformer T is connected with rectifier bridge D input, described
Rectifier bridge D positive output end is connected with current-limiting resistance R1 one end, the negative output terminal ground connection of the rectifier bridge D, the current limliting
The positive pole with the first voltage-regulator diode D1, selecting switch S one end are connected the resistance R1 other end respectively, first voltage stabilizing
Diode D1 negative pole is connected with the second voltage-regulator diode D2 positive pole, and the negative pole of the second voltage-regulator diode D2 passes through electricity
Resistance R4 is connected to the ground, and the negative pole of the second voltage-regulator diode D2 is also connected by resistance R5 with triode Q1 base stage,
The external first resistor R2 of other end one end or second resistance R3 one end of the selecting switch S, the first resistor R2
The other end, the second resistance R3 other end be connected with triode Q1 emitter stage, the colelctor electrode conduct of the triode Q1
The positive charging end of battery.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The output voltage of the transformer T is
12V, electric current 300mA.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The current-limiting resistance R1 also parallel connections are
Light emitting diode D3, the positive pole of the light emitting diode D3 are connected with rectifier bridge D positive output end, the light emitting diode D3
Negative pole be connected with the first voltage-regulator diode D1 positive pole.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The positive and negative output of the rectifier bridge D
Also parallel connection is filter circuit C1 between end.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The selecting switch S is single-pole double throw
Switch.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The resistance of the first resistor R2 is
10 Ω, second resistance R3 resistance are 200 Ω.
A kind of constant-current charging circuit of foregoing adjustable current, it is characterised in that：The input of the transformer T is also gone here and there
Join for fuse F1.
The beneficial effects of the invention are as follows：The constant-current charging circuit of the adjustable current of the present invention, circuit is simple, and cost is low
It is honest and clean, it is easy to produce in batches, moreover, charging current can be adjusted, selectivity is strong, widely applicable, easy to use, has good answer
Use prospect.
Brief description of the drawings
Fig. 1 is the circuit diagram of the constant-current charging circuit of the adjustable current of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.Following examples are only used for clearly
Illustrate technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, a kind of constant-current charging circuit of adjustable current, including transformer T, rectifier bridge D, current-limiting resistance
R1, the first voltage-regulator diode D1, the second voltage-regulator diode D2, triode Q1, first resistor R2, second resistance R3 and selecting switch
S, transformer the T external civil power of input, transformer T output end are connected with rectifier bridge D input, and rectifier bridge D is just
Output end is connected with current-limiting resistance R1 one end, rectifier bridge D negative output terminal ground connection, the current-limiting resistance R1 other end respectively with
First voltage-regulator diode D1 positive pole, selecting switch S one end are connected, the first voltage-regulator diode D1 negative pole and the second voltage stabilizing
Diode D2 positive pole is connected, and the second voltage-regulator diode D2 negative pole is connected to the ground by resistance R4, the pole of the second voltage stabilizing two
Pipe D2 negative pole is also connected by resistance R5 with triode Q1 base stage, the selecting switch S external first resistor R2 of the other end
One end or second resistance R3 one end, the first resistor R2 other end, the second resistance R3 other end and triode Q1
Emitter stage is connected, the positive charging end of triode Q1 colelctor electrode as battery.
The output voltage of the transformer T is 12V, and electric current 300mA, current-limiting resistance R1 also parallel connection are light emitting diode
D3, the positive pole of the light emitting diode D3 are connected with rectifier bridge D positive output end, the negative pole of the light emitting diode D3 and
One voltage-regulator diode D1 positive pole is connected, and also parallel connection is filter circuit C1 between rectifier bridge D positive and negative output end, and selection is opened
Pass S is single-pole double-throw switch (SPDT), and first resistor R2 resistance is 10 Ω, and second resistance R3 resistance is 200 Ω, and transformer T's is defeated
It is fuse F1 to enter end also series connection.
The operation principle of constant-current charging circuit of the adjustable current of the present invention is, the first voltage-regulator diode D1 of series connection,
Second voltage-regulator diode D2 voltage is reduced to 1.2V, and triode Q1 base-emitter voltage drop is 0.6V, therefore, first resistor R2,
One resistance R2 pressure drops are 0.6V, as the first resistor R2 of selecting switch S selections top, with 60mA constant-current charges；When under selection
During the second resistance R3 of side, with 3mA constant-current charges, circuit is simple, and cost is cheap, is easy to produce in batches, is filled moreover, can adjust
Electric current, selectivity is strong, widely applicable, easy to use, has a good application prospect.
General principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (1)
- A kind of 1. constant-current charging circuit of adjustable current, it is characterised in that：Including transformer T, rectifier bridge D, current-limiting resistance R1, First voltage-regulator diode D1, the second voltage-regulator diode D2, triode Q1, first resistor R2, second resistance R3 and selecting switch S, The external civil power of input of the transformer T, the output end of the transformer T is connected with rectifier bridge D input, described whole Stream bridge D positive output end is connected with current-limiting resistance R1 one end, the negative output terminal ground connection of the rectifier bridge D, the current limliting electricity The positive pole with the first voltage-regulator diode D1, selecting switch S one end are connected the resistance R1 other end respectively, first voltage stabilizing two Pole pipe D1 negative pole is connected with the second voltage-regulator diode D2 positive pole, and the negative pole of the second voltage-regulator diode D2 passes through resistance R4 is connected to the ground, and the negative pole of the second voltage-regulator diode D2 is also connected by resistance R5 with triode Q1 base stage, institute The selecting switch S external first resistor R2 of other end one end or second resistance R3 one end is stated, the first resistor R2's The other end, the second resistance R3 other end are connected with triode Q1 emitter stage, and the colelctor electrode of the triode Q1 is as storage The positive charging end of battery, the output voltage of the transformer T are 12V, electric current 300mA, and the current-limiting resistance R1 also parallel connections are Light emitting diode D3, the positive pole of the light emitting diode D3 are connected with rectifier bridge D positive output end, the light emitting diode D3 Negative pole be connected with the first voltage-regulator diode D1 positive pole, it is also in parallel for filtering between the positive and negative output end of the rectifier bridge D Circuit C1, the selecting switch S are single-pole double-throw switch (SPDT), and the resistance of the first resistor R2 is 10 Ω, second resistance R3 resistance It is worth and is also connected as fuse F1 for 200 Ω, the input of the transformer T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207910.1A CN104836316B (en) | 2015-04-29 | 2015-04-29 | A kind of constant-current charging circuit of adjustable current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207910.1A CN104836316B (en) | 2015-04-29 | 2015-04-29 | A kind of constant-current charging circuit of adjustable current |
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| Publication Number | Publication Date |
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| CN104836316A CN104836316A (en) | 2015-08-12 |
| CN104836316B true CN104836316B (en) | 2017-11-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576788A (en) * | 2016-03-07 | 2016-05-11 | 吴圣铎 | Large-current wide-voltage constant current charger |
| CN108649640A (en) * | 2018-05-25 | 2018-10-12 | 四川斐讯信息技术有限公司 | A kind of universal charger, intelligent charge interactive system and exchange method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2036473A (en) * | 1978-11-20 | 1980-06-25 | Accumulateurs Fixes | A Current Regulator Circuit, in Particular for Charging an Emergency Power Supply Unit at Constant Current |
| CN2066633U (en) * | 1990-03-21 | 1990-11-28 | 王道清 | Adjustable galvanostatic automatic charger |
| CN101425694A (en) * | 2008-12-10 | 2009-05-06 | 吕成学 | Equalized charging apparatus used for series batteries |
| CN201830000U (en) * | 2010-10-21 | 2011-05-11 | 安徽省华信生物药业股份有限公司 | Constant-voltage and constant-current charger |
| CN102611179A (en) * | 2012-04-05 | 2012-07-25 | 朱虹 | High-performance constant-current charger |
| CN204681147U (en) * | 2015-04-29 | 2015-09-30 | 苏州锟恩电子科技有限公司 | A kind of constant-current charging circuit of adjustable current |
-
2015
- 2015-04-29 CN CN201510207910.1A patent/CN104836316B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2036473A (en) * | 1978-11-20 | 1980-06-25 | Accumulateurs Fixes | A Current Regulator Circuit, in Particular for Charging an Emergency Power Supply Unit at Constant Current |
| CN2066633U (en) * | 1990-03-21 | 1990-11-28 | 王道清 | Adjustable galvanostatic automatic charger |
| CN101425694A (en) * | 2008-12-10 | 2009-05-06 | 吕成学 | Equalized charging apparatus used for series batteries |
| CN201830000U (en) * | 2010-10-21 | 2011-05-11 | 安徽省华信生物药业股份有限公司 | Constant-voltage and constant-current charger |
| CN102611179A (en) * | 2012-04-05 | 2012-07-25 | 朱虹 | High-performance constant-current charger |
| CN204681147U (en) * | 2015-04-29 | 2015-09-30 | 苏州锟恩电子科技有限公司 | A kind of constant-current charging circuit of adjustable current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104836316A (en) | 2015-08-12 |
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Effective date of registration: 20230217 Address after: Room 7070, Floor 7, Building 6, No. 2996, Taidong Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215000 Patentee after: Saijing (Jiangsu) Vision Technology Co.,Ltd. Address before: 215153 255-7 Hua Jin Road, Tongan town, Suzhou hi tech Zone, Jiangsu Patentee before: SUZHOU KUEN ELECTRONIC TECH. Co.,Ltd. |