CN202404472U - Multichannel parallel constant-current control circuit - Google Patents
Multichannel parallel constant-current control circuit Download PDFInfo
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- CN202404472U CN202404472U CN2012200210985U CN201220021098U CN202404472U CN 202404472 U CN202404472 U CN 202404472U CN 2012200210985 U CN2012200210985 U CN 2012200210985U CN 201220021098 U CN201220021098 U CN 201220021098U CN 202404472 U CN202404472 U CN 202404472U
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Abstract
The utility model provides a multichannel parallel constant-current control circuit which comprises an input module, a power amplifying circuit and a constant current branch circuit, wherein the input module is used for rectifying a control voltage to enable the control voltage to meet the input requirement of the power amplifying module; the power amplifying module is used for amplifying the power of the control voltage to output a control signal enough for supporting a plurality of parallel constant-current branch circuits; the constant-current circuit is used for realizing constant current control; the input module is electrically connected with the power amplifying module; and the power amplifying module is electrically connected with the constant-current branch circuits. According to the multichannel parallel constant-current control circuit disclosed by the utility model, an operational amplifier is used to form a feedback circuit for automatically tracking the current of the parallel branch circuits in real time, automatically adjusting the control signal and realizing constant current and equalized current of the parallel circuit.
Description
Technical field
The utility model relates to a kind of multi-channel parallel constant-current control circuit.
Background technology
Large-capacity battery pack is being carried out high pressure, large current charge simultaneously,, need power tube be connected in parallel in the linear circuit, and keep each power device power averaging for improving the power of constant-current circuit.Therefore, need a kind of multi-channel parallel constant-current control circuit of design, satisfy the battery charge demand.But the control effect of some present multi-channel parallel constant-current control circuits is unsatisfactory, and unbalanced phenomenon usually appears in the electric current of each charging paths, and the circuit production cost is higher.
The utility model content
In view of this, be necessary, provide a kind of constant current control multi-channel parallel constant-current control circuit reliable for effect, simple in structure to the problems referred to above.
For this reason, the utility model adopts following technical scheme:
A kind of multi-channel parallel constant-current control circuit is characterized in that, comprising:
Load module is used for control voltage is carried out rectification, makes it meet the input requirement of power amplifier module;
Power amplifier module is used for the power of control voltage is amplified, and is enough to support the control signal of the constant current branch road of many parallel connections with output;
The constant current branch road is used to realize constant current control;
Load module is electrically connected with power amplifier module, and power amplifier module is electrically connected with many constant current branch roads.
The structure of said power amplifier module is: the output terminal of load module is connected to the in-phase input end of first operational amplifier (A) after through first resistance (Rv1); The output terminal of first operational amplifier (A) is connected to the inverting input of self; Be parallel with first electric capacity (C1) and electrochemical capacitor (CA1) between the output terminal of first operational amplifier (A) and the ground, the output terminal of first operational amplifier (A) is the output terminal of power amplifier module.
The structure of said constant current branch road is: the output terminal of power amplifier module is connected to the in-phase input end of second operational amplifier (A1) after through second resistance (R11); The output terminal of second operational amplifier (A1) is connected to the inverting input of self after through second electric capacity (C12); The output terminal of second operational amplifier (A1) is connected to the grid of metal-oxide-semiconductor (Q1) after through the 3rd resistance (R12); The grid of metal-oxide-semiconductor (Q1) is connected to ground after through the 4th resistance (R13); Charging voltage is from the drain electrode input of metal-oxide-semiconductor (Q1); The source electrode of metal-oxide-semiconductor (Q1) is connected to the inverting input of second operational amplifier (A1) after through the 5th resistance (R14), and the source electrode of metal-oxide-semiconductor (Q1) is connected to ground after through charging load (R15).
The operational amplifier that the utility model utilizes is formed feedback circuit, and the electric current in the real-time automatic tracking parallel branch is adjusted control signal automatically and realized parallel circuit constant current and current-sharing.It is inconsistent because of each modular character in the parallel circuit that this circuit can be avoided, and the module that external characteristics occurs is born more multiple current, even overload, makes the module of external characteristics difference run on underloading or unloaded phenomenon.
The multi-channel parallel constant-current control circuit of the utility model has the output power extendability, design flexibility, high reliability, the advantage that is easy to safeguard.The most suitable applying in the large power, electrically origin system can be satisfied the requirement of bearing power.
Description of drawings
Fig. 1 is the modular structure synoptic diagram of the utility model;
Fig. 2 is the power amplifier module and the constant current subcircuits figure of the utility model.
Embodiment
To combine accompanying drawing and embodiment that the utility model is done further detailed explanation below.
The utility model provides a kind of multi-channel parallel constant-current control circuit as shown in Figure 1, and it comprises:
Load module is used for control voltage is carried out rectification, makes it meet the input requirement of power amplifier module;
Power amplifier module is used for the power of control voltage is amplified, and is enough to support the control signal of the constant current branch road of many parallel connections with output;
The constant current branch road comprises first to N constant current branch road, is used to realize constant current control.
Load module is electrically connected with power amplifier module, and power amplifier module is electrically connected to N constant current branch road with first.
As shown in Figure 2; The structure of said power amplifier module is: the output terminal of load module is connected to the in-phase input end of first operational amplifier A after through the first resistance R v1; The output terminal of first operational amplifier A is connected to the inverting input of self; Be parallel with first capacitor C 1 and electrochemical capacitor CA1 between the output terminal of first operational amplifier A and the ground, the output terminal of first operational amplifier A is the output terminal of power amplifier module.
Comprise first to the 8th constant current branch road in embodiment illustrated in fig. 2; The structure of the said first constant current branch road is: the output terminal of power amplifier module is connected to the in-phase input end of second operational amplifier A 1 after through second resistance R 11; The output terminal of second operational amplifier A 1 is connected to the inverting input of self after through second capacitor C 12; The output terminal of second operational amplifier A 1 is connected to the grid of metal-oxide-semiconductor Q1 after through the 3rd resistance R 12; The grid of metal-oxide-semiconductor Q1 is connected to ground after through the 4th resistance R 13; Charging voltage VCC is from the drain electrode of metal-oxide-semiconductor Q1 input, and the source electrode of metal-oxide-semiconductor Q1 is connected to the inverting input of second operational amplifier A 1 after through the 5th resistance R 14, and the source electrode of metal-oxide-semiconductor Q1 is connected to ground after through charging load R15.
The control voltage of power amplifier module output is added in the grid of metal-oxide-semiconductor Q1 after through second operational amplifier A 1, and through the size of current of metal-oxide-semiconductor Q1 control charging voltage VCC in source electrode output.The current signal of metal-oxide-semiconductor Q1 feeds back to the inverting input of second operational amplifier A 1 again.When the source electrode output current of metal-oxide-semiconductor Q1 changes; Second operational amplifier A 1 is added in the voltage swing of metal-oxide-semiconductor Q1 grid according to the current signal adjustment in real time of feedback; Source electrode output current to guarantee metal-oxide-semiconductor Q1 is constant in ratings, has reached constant current control effect.
The structure of second to the 8th constant current branch road is identical with the first constant current branch road.Owing to have identical control signal and a charging voltage, first to the 8th constant current branch road of above-mentioned parallel connection all can reach the effect of multi-channel parallel constant current control with the outputting current steadily of each branch road metal-oxide-semiconductor source electrode at same ratings.According to the practical application needs, can also expand circuit, increase the quantity of constant current branch road.
The above embodiment has only expressed several kinds of embodiments of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model patent should be as the criterion with accompanying claims.
Claims (3)
1. a multi-channel parallel constant-current control circuit is characterized in that, comprising:
Load module is used for control voltage is carried out rectification, makes it meet the input requirement of power amplifier module;
Power amplifier module is used for the power of control voltage is amplified, and is enough to support the control signal of the constant current branch road of many parallel connections with output;
The constant current branch road is used to realize constant current control;
Load module is electrically connected with power amplifier module, and power amplifier module is electrically connected with many constant current branch roads.
2. multi-channel parallel constant-current control circuit according to claim 1; It is characterized in that; The structure of said power amplifier module is: the output terminal of load module is connected to the in-phase input end of first operational amplifier (A) after through first resistance (Rv1); The output terminal of first operational amplifier (A) is connected to the inverting input of self; Be parallel with first electric capacity (C1) and electrochemical capacitor (CA1) between the output terminal of first operational amplifier (A) and the ground, the output terminal of first operational amplifier (A) is the output terminal of power amplifier module.
3. multi-channel parallel constant-current control circuit according to claim 1; It is characterized in that; The structure of said constant current branch road is: the output terminal of power amplifier module is connected to the in-phase input end of second operational amplifier (A1) after through second resistance (R11); The output terminal of second operational amplifier (A1) is connected to the inverting input of self after through second electric capacity (C12); The output terminal of second operational amplifier (A1) is connected to the grid of metal-oxide-semiconductor (Q1) after through the 3rd resistance (R12), and the grid of metal-oxide-semiconductor (Q1) is connected to ground after through the 4th resistance (R13), and charging voltage is from the drain electrode input of metal-oxide-semiconductor (Q1); The source electrode of metal-oxide-semiconductor (Q1) is connected to the inverting input of second operational amplifier (A1) after through the 5th resistance (R14), and the source electrode of metal-oxide-semiconductor (Q1) is connected to ground after through charging load (R15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200210985U CN202404472U (en) | 2012-01-16 | 2012-01-16 | Multichannel parallel constant-current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200210985U CN202404472U (en) | 2012-01-16 | 2012-01-16 | Multichannel parallel constant-current control circuit |
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| Publication Number | Publication Date |
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| CN202404472U true CN202404472U (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200210985U Expired - Fee Related CN202404472U (en) | 2012-01-16 | 2012-01-16 | Multichannel parallel constant-current control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061438A (en) * | 2018-07-17 | 2018-12-21 | 武汉精测电子集团股份有限公司 | A kind of multiple power supplies parallel current-sharing device and method for the detection of mould group |
| CN113365388A (en) * | 2021-03-18 | 2021-09-07 | 上海可大光电科技有限公司 | Lamp strip and lamp driven by constant-current power supply |
-
2012
- 2012-01-16 CN CN2012200210985U patent/CN202404472U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061438A (en) * | 2018-07-17 | 2018-12-21 | 武汉精测电子集团股份有限公司 | A kind of multiple power supplies parallel current-sharing device and method for the detection of mould group |
| CN109061438B (en) * | 2018-07-17 | 2021-03-09 | 武汉精测电子集团股份有限公司 | Multi-path power supply parallel current equalizing device and method for module detection |
| CN113365388A (en) * | 2021-03-18 | 2021-09-07 | 上海可大光电科技有限公司 | Lamp strip and lamp driven by constant-current power supply |
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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: 20120829 Termination date: 20130116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |