CN106598127A - Multipath output constant-current control circuit - Google Patents
Multipath output constant-current control circuit Download PDFInfo
- Publication number
- CN106598127A CN106598127A CN201611079234.5A CN201611079234A CN106598127A CN 106598127 A CN106598127 A CN 106598127A CN 201611079234 A CN201611079234 A CN 201611079234A CN 106598127 A CN106598127 A CN 106598127A
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- China
- Prior art keywords
- output
- output current
- power conversion
- current
- conversion circuit
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a multipath output constant-current control circuit, and the circuit comprises a power conversion circuit. The output end of the power conversion circuit is connected with a plurality of output current collection modules, and the output end of each output current collection module is connected with a corresponding output load. The circuit also comprises an output current signal collection and processing module, wherein the signal input end of the output current signal collection and processing module is connected with a plurality of output current collection modules, and the signal output end of the output current signal collection and processing module is connected with the power conversion circuit. According to the invention, there is no need to set a constant circuit for each output, thereby enabling the circuit structure to be simpler and enabling the cost to be low.
Description
Technical field
The present invention relates to a kind of constant-current control circuit of multiple-channel output.
Background technology
At present, the multiple constant current output for being applied to LED illumination is substantially adopted：
1. multiple constant current AC-DC circuits or constant current DC-DC circuit or linear constant current electric current, i.e., every to have exported all the way
Corresponding constant-current circuit.These schemes can cause circuit complicated, with high costs.
2. a multiple-channel output constant current source used in parallel.The problem of the program is, per electric current meeting all the way because wherein
Open circuit causes the electric current increase of other road outputs all the way, reduces system reliability.
The content of the invention
The present invention seeks to a kind of simple structure, high reliability of defect offer for being directed to prior art presence is with low cost
The constant-current control circuit of multi-channel parallel output.
The present invention for achieving the above object, is adopted the following technical scheme that：A kind of constant-current control circuit of multiple-channel output, including
Power conversion circuit, the outfan of the power conversion circuit are connected with multiple output current acquisition modules respectively, described in each
The outfan of output current acquisition module is connected with corresponding output loading respectively；Also include output current signal acquisition process mould
Block, its signal input part are connected with multiple output current acquisition modules respectively, its signal output part and the power conversion
Circuit connects；
Wherein, the output current acquisition module collection is per output current all the way and passes to output current signal process
Module, the output current signal processing module handle the current information of output well, and pass to power conversion circuit, by described
Power conversion circuit is converted to constant current output according to the current information that the output current signal processing module is gathered；
Wherein, the PFC of the power conversion circuit and energy converting transmission are the single-stage for sharing magnetic device
Structure, or the power conversion circuit PFC and energy be transmitted as the two-layer configuration of different magnetic devices；
Wherein, the output current acquisition module is multiple sampling resistors collection output current or is multiple current transformers
Collection output current；
Wherein, the output current acquisition module is multiple sampling resistors collection output current or is multiple current transformers
Collection output current
Beneficial effects of the present invention：
1st, the present invention need not be both provided with constant-current circuit per output all the way so that circuit structure is simpler, with low cost.
2nd, the present invention can adjust total output current according to output situation, can be as needed when the output no-load of part
Output current is reduced, so as to keep the output of All other routes constant, reliability is improve.
3rd, the present invention can be easy to be connected with digital processing chip by output current signal processing module controlled output,
More multi-functional, the different demands of adaptation are realized easily.
4th, the present invention is applied to more output ways, strong adaptability.
Description of the drawings
Fig. 1 is the functional schematic of the present invention.
Specific embodiment
Shown in Fig. 1, it is related to a kind of constant-current control circuit of multiple-channel output, including power conversion circuit, the power conversion
The outfan of circuit is connected with multiple output current acquisition modules respectively, each described output current acquisition module respectively with it is corresponding
Output loading connection；Also include output current signal acquisition processing module, its signal input part respectively with multiple outputs
Current acquisition module connects, and its signal output part is connected with the power conversion circuit；
Wherein, the output current acquisition module collection is per output current all the way and passes to output current signal process
Module, the output current signal processing module handle the current information of output well, and pass to power conversion circuit, by described
Power conversion circuit is converted to constant current output according to the current information that the output current signal processing module is gathered.
The present invention includes (but not limited to) in the following manner realization：
Power conversion circuit：Existing Switching Power Supply can be used as power conversion circuit, and which can be according to output current signal
Input power is converted into constant current source and is transferred to output current acquisition module by the signal of processing module.
The power-varying circuitry mainly includes two classes：
1. PFC and energy converting transmission share the single step arrangement of magnetic device.
2. PFC and energy transmission structure use the two-layer configuration of different magnetic devices.
Output current acquisition module：
1. output current is gathered using multiple sampling resistors.
2. output current is gathered using multiple current transformers.
Output current signal processing module：
1. single-chip microcomputer is used as output current information processing module；
2. other modes process output current information and pass to power conversion circuit.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (1)
1. a kind of constant-current control circuit of multiple-channel output, it is characterised in that including power conversion circuit, the power conversion circuit
Outfan be connected with multiple output current acquisition modules respectively, the outfan of each output current acquisition module respectively with
Corresponding output loading connection；Also include output current signal acquisition processing module, its signal input part is described with multiple respectively
Output current acquisition module connects, and its signal output part is connected with the power conversion circuit；
Wherein, the output current acquisition module collection is per output current all the way and passes to output current signal process mould
Block, the output current signal processing module handle the current information of output well, and pass to power conversion circuit, by the work(
Rate translation circuit is converted to constant current output according to the current information that the output current signal processing module is gathered；
Wherein, the PFC of the power conversion circuit and energy converting transmission are the single-stage knot for sharing magnetic device
Structure, or the power conversion circuit PFC and energy be transmitted as the two-layer configuration of different magnetic devices；
Wherein, the output current acquisition module is that multiple sampling resistors gather output current or gather for multiple current transformers
Output current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079234.5A CN106598127A (en) | 2016-11-30 | 2016-11-30 | Multipath output constant-current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079234.5A CN106598127A (en) | 2016-11-30 | 2016-11-30 | Multipath output constant-current control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106598127A true CN106598127A (en) | 2017-04-26 |
Family
ID=58595719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611079234.5A Pending CN106598127A (en) | 2016-11-30 | 2016-11-30 | Multipath output constant-current control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106598127A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582129A (en) * | 2013-10-15 | 2015-04-29 | 三菱电机株式会社 | Light source control device and light source control method |
| CN204539556U (en) * | 2014-12-17 | 2015-08-05 | 广州南科集成电子有限公司 | The switch dimming drive circuit of Width funtion LED and LED dimming control system |
| CN104883793A (en) * | 2015-06-09 | 2015-09-02 | 南京矽力杰半导体技术有限公司 | Multi-path LED current-constant drive circuit and drive method |
| CN104955203A (en) * | 2014-03-28 | 2015-09-30 | 深圳市明微电子股份有限公司 | LED color temperature adjusting circuit and LED lamp |
| CN205726567U (en) * | 2016-06-08 | 2016-11-23 | 深圳市志和兴业电子有限公司 | A kind of multiple-channel output constant-current circuit |
-
2016
- 2016-11-30 CN CN201611079234.5A patent/CN106598127A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582129A (en) * | 2013-10-15 | 2015-04-29 | 三菱电机株式会社 | Light source control device and light source control method |
| CN104955203A (en) * | 2014-03-28 | 2015-09-30 | 深圳市明微电子股份有限公司 | LED color temperature adjusting circuit and LED lamp |
| CN204539556U (en) * | 2014-12-17 | 2015-08-05 | 广州南科集成电子有限公司 | The switch dimming drive circuit of Width funtion LED and LED dimming control system |
| CN104883793A (en) * | 2015-06-09 | 2015-09-02 | 南京矽力杰半导体技术有限公司 | Multi-path LED current-constant drive circuit and drive method |
| CN205726567U (en) * | 2016-06-08 | 2016-11-23 | 深圳市志和兴业电子有限公司 | A kind of multiple-channel output constant-current circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170426 |
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| RJ01 | Rejection of invention patent application after publication |