CN104219843B - The multiplex output circuit of superposition current constant control framework - Google Patents
The multiplex output circuit of superposition current constant control framework Download PDFInfo
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- CN104219843B CN104219843B CN201410437120.8A CN201410437120A CN104219843B CN 104219843 B CN104219843 B CN 104219843B CN 201410437120 A CN201410437120 A CN 201410437120A CN 104219843 B CN104219843 B CN 104219843B
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Abstract
The invention provides the multiplex output circuit of a kind of superposition current constant control framework, including the constant-current control circuit that constant-current source, voltage detecting and controling circuit, multiple LED module and multiple LED module are corresponding, described constant-current source exports to described constant-current control circuit for alternating current is converted to unidirectional current；Described voltage detecting and controling circuit is used for detecting constant-current source outfan LED+ voltage and outputs a control signal to constant-current source；Described constant-current control circuit outputs a control signal to constant-current source for the electric current detecting the constant-current source corresponding branch road of outfan LED；Described LED module is used for circuit output loading.The invention has the beneficial effects as follows: the present invention carries out multiple constant current output, a road or a few road open circuit, other loop currents will not be caused to strengthen, do not interfere with other loops and normally work, and power-efficient is high, and low cost, without EMI problem, it is easy to accomplish.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to the multiplex output circuit of superposition current constant control framework.
Background technology
The multiple constant current output LED power of application at present, type of drive has: constant-current source rear class adds multichannel DC-DC circuit and realizes multiple constant current output, and current multiple-channel output DC-DC circuit efficiency is low, cost is high, tend to have EMI problem.
Summary of the invention
In order to solve the problems of the prior art, the invention provides the multiplex output circuit of a kind of superposition current constant control framework.
The invention provides the multiplex output circuit of a kind of superposition current constant control framework, including the constant-current control circuit that constant-current source, voltage detecting and controling circuit, multiple LED module and multiple LED module are corresponding, described constant-current source exports to described constant-current control circuit for alternating current is converted to unidirectional current；Described voltage detecting and controling circuit is used for detecting constant-current source outfan LED+ voltage and outputs a control signal to constant-current source；Described constant-current control circuit outputs a control signal to constant-current source for the electric current detecting the constant-current source corresponding branch road of outfan LED-；Described LED module is used for circuit output loading.
nullAs a further improvement on the present invention，In described voltage detecting and controling circuit: resistance R52 one end is connected with constant-current source outfan LED+，The resistance R52 other end respectively with resistance R55、Resistance R53、Electric capacity C35 connects，The resistance R53 other end and resistance SR1、Resistance SR2、Resistance R54 connects，Resistance SR1、Resistance SR2、Resistance R54、Electric capacity C35 other end ground connection，The resistance R55 other end is connected with resistance B2，The resistance B2 other end is connected with 2 feet and the electric capacity C37 of double operational chip U4 respectively，Electric capacity C37 is connected with resistance R57，The resistance R57 other end is connected with 1 foot and the resistance R58 of double operational chip U4，The resistance R58 other end is connected with the negative pole of diode D20，The positive pole of diode D20 is connected with resistance R60，Resistance R60 is connected with control signal wire CC_OUT，Resistance R63 one end exports VCC with constant-current source respectively、8 feet of double operational chip U4 and 5 feet、Electric capacity C38 connects，The resistance R63 other end respectively with K foot and the R foot of voltage stabilizing chip SHR1、Resistance R56 connects，The other end of resistance R56 is connected with resistance B1，The resistance B1 other end is connected with 3 feet of double operational chip U4，The electric capacity C38 other end is connected with 4 feet of double operational chip U4 and ground connection，The A foot ground connection of voltage stabilizing chip SHR1，The 6 foot ground connection of double operational chip U4.
As a further improvement on the present invention, described voltage stabilizing chip SHR1 provides 2.5V reference voltage for described double operational chip U4.
As a further improvement on the present invention, described LED module is four, and described constant-current control circuit is four, and four LED modules are connected with four constant-current control circuit one_to_one corresponding respectively.
As a further improvement on the present invention, the output branch road of described constant-current source outfan LED-is LED1-, LED2-, LED3-, LED4-, and multiple output branch roads of described constant-current source outfan LED-are connected with multiple constant-current control circuits respectively.
As a further improvement on the present invention, described output branch road LED1-is connected with resistance R72, the resistance R72 other end is connected with electric capacity C50, resistance B3 respectively, the electric capacity C50 other end is connected with resistance R71, resistance B3 is connected with 2 feet of four high guaily unit chip U7, the resistance R71 other end 1 foot with resistance R70, four high guaily unit chip U7 respectively is connected, resistance R70 is connected with diode D30 negative pole, and diode D30 positive pole is connected with diode D31 positive pole, diode D32 positive pole, diode D33 positive pole and control signal wire CC_OUT respectively；
Output branch road LED2-is connected with resistance R75, the resistance R75 other end is connected with electric capacity C51, resistance B5 respectively, the electric capacity C51 other end is connected with resistance R74, resistance B5 is connected with 6 feet of four high guaily unit chip U7, the resistance R74 other end 7 feet with resistance R73, four high guaily unit chip U7 respectively are connected, and resistance R73 is connected with diode D31 negative pole；
Output branch road LED3-is connected with resistance R78, the resistance R78 other end is connected with electric capacity C52, resistance B6 respectively, the electric capacity C52 other end is connected with resistance R77, resistance B6 is connected with 9 feet of four high guaily unit chip U7, the resistance R77 other end 8 feet with resistance R76, four high guaily unit chip U7 respectively are connected, and resistance R76 is connected with diode D32 negative pole；
Output branch road LED4-is connected with resistance R81, the resistance R81 other end is connected with electric capacity C53, resistance B7 respectively, the electric capacity C53 other end is connected with resistance R80, resistance B7 is connected with 12 feet of four high guaily unit chip U7, the resistance R80 other end 14 feet with resistance R79, four high guaily unit chip U7 respectively are connected, and resistance R79 is connected with diode D33 negative pole；
Resistance B4 is connected with 3 feet of four high guaily unit chip U7,5 feet, 10 feet, 13 feet respectively, and the resistance B4 other end is connected with resistance R83, resistance R83 other end ground connection.
As a further improvement on the present invention, electric capacity C61 4 feet with VCC, four high guaily unit chip U7 respectively are connected, and the electric capacity C61 other end is connected with 11 feet of four high guaily unit chip U7 and ground connection.
The invention has the beneficial effects as follows: the present invention carries out multiple constant current output, a road or a few road open circuit, other loop currents will not be caused to strengthen, do not interfere with other loops and normally work, and power-efficient is high, and low cost, without EMI problem, it is easy to accomplish.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the voltage detecting and controling circuit figure of the present invention.
Fig. 3 is the constant-current control circuit figure of the present invention.
Detailed description of the invention
As shown in Figure 1, the invention discloses the multiplex output circuit of a kind of superposition current constant control framework, including constant-current source, voltage detecting and controling circuit, multiple LED module and multiple LED module and corresponding constant-current control circuit, described constant-current source exports to described constant-current control circuit for alternating current is converted to unidirectional current；Described voltage detecting and controling circuit is used for detecting constant-current source outfan LED+ voltage and outputs a control signal to constant-current source；Described constant-current control circuit outputs a control signal to constant-current source for the electric current detecting the constant-current source corresponding branch road of outfan LED-；Described LED module is used for circuit output loading.
This circuit controls maximum output voltage by detection output voltage, and controls to export electric current to reach the purpose of single channel current constant control by detection branch output electric current, and a few paths of LEDs module loops are superimposed, it is achieved multiple constant current exports.The invention has the beneficial effects as follows: the present invention carries out multiple constant current output, a road or a few road open circuit, other loop currents will not be caused to strengthen, do not interfere with other loops and normally work, and power-efficient is high, and low cost, without EMI problem, it is easy to accomplish.
nullAs shown in Figure 2，In described voltage detecting and controling circuit: resistance R52 one end is connected with constant-current source outfan LED+，The resistance R52 other end respectively with resistance R55、Resistance R53、Electric capacity C35 connects，The resistance R53 other end and resistance SR1、Resistance SR2、Resistance R54 connects，Resistance SR1、Resistance SR2、Resistance R54、Electric capacity C35 other end ground connection，The resistance R55 other end is connected with resistance B2，The resistance B2 other end is connected with 2 feet and the electric capacity C37 of double operational chip U4 respectively，Electric capacity C37 is connected with resistance R57，The resistance R57 other end is connected with 1 foot and the resistance R58 of double operational chip U4，The resistance R58 other end is connected with the negative pole of diode D20，The positive pole of diode D20 is connected with resistance R60，Resistance R60 is connected with control signal wire CC_OUT，Resistance R63 one end exports VCC with constant-current source respectively、8 feet of double operational chip U4 and 5 feet、Electric capacity C38 connects，The resistance R63 other end respectively with K foot and the R foot of voltage stabilizing chip SHR1、Resistance R56 connects，The other end of resistance R56 is connected with resistance B1，The resistance B1 other end is connected with 3 feet of double operational chip U4，The electric capacity C38 other end is connected with 4 feet of double operational chip U4 and ground connection，The A foot ground connection of voltage stabilizing chip SHR1，The 6 foot ground connection of double operational chip U4.
Described voltage stabilizing chip SHR1 provides 2.5V reference voltage for described double operational chip U4.
As shown in Figure 3, the output branch road of described constant-current source outfan LED-is LED1-, LED2-, LED3-, LED4-, described output branch road LED1-is connected with resistance R72, the resistance R72 other end respectively with electric capacity C50, resistance B3 connects, the electric capacity C50 other end is connected with resistance R71, resistance B3 is connected with 2 feet of four high guaily unit chip U7, the resistance R71 other end respectively with resistance R70, 1 foot of four high guaily unit chip U7 connects, resistance R70 is connected with diode D30 negative pole, diode D30 positive pole respectively with diode D31 positive pole, diode D32 positive pole, diode D33 positive pole and control signal wire CC_OUT connect.
Output branch road LED2-is connected with resistance R75, the resistance R75 other end is connected with electric capacity C51, resistance B5 respectively, the electric capacity C51 other end is connected with resistance R74, resistance B5 is connected with 6 feet of four high guaily unit chip U7, the resistance R74 other end 7 feet with resistance R73, four high guaily unit chip U7 respectively are connected, and resistance R73 is connected with diode D31 negative pole.
Output branch road LED3-is connected with resistance R78, the resistance R78 other end is connected with electric capacity C52, resistance B6 respectively, the electric capacity C52 other end is connected with resistance R77, resistance B6 is connected with 9 feet of four high guaily unit chip U7, the resistance R77 other end 8 feet with resistance R76, four high guaily unit chip U7 respectively are connected, and resistance R76 is connected with diode D32 negative pole.
Output branch road LED4-is connected with resistance R81, the resistance R81 other end is connected with electric capacity C53, resistance B7 respectively, the electric capacity C53 other end is connected with resistance R80, resistance B7 is connected with 12 feet of four high guaily unit chip U7, the resistance R80 other end 14 feet with resistance R79, four high guaily unit chip U7 respectively are connected, and resistance R79 is connected with diode D33 negative pole.
Other the like ....
Resistance B4 is connected with 3 feet of four high guaily unit chip U7,5 feet, 10 feet, 13 feet respectively, and the resistance B4 other end is connected with resistance R83, resistance R83 other end ground connection.
Electric capacity C61 4 feet with VCC, four high guaily unit chip U7 respectively are connected, and the electric capacity C61 other end is connected with 11 feet of four high guaily unit chip U7 and ground connection.
Electromagnetic interference: Electromagnetic
Interference is called for short EMI.
The present invention carries out multiple constant current output, a road or a few road open circuit, other loop currents will not be caused to strengthen, do not interfere with other loops and normally work, and power-efficient is high, and low cost, without EMI problem, it is easy to accomplish.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert the present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. the multiplex output circuit of a superposition current constant control framework, it is characterized in that: include the constant-current control circuit that constant-current source, voltage detecting and controling circuit, multiple LED module and multiple LED module are corresponding, described constant-current source exports to described constant-current control circuit for alternating current is converted to unidirectional current；Described voltage detecting and controling circuit is used for detecting constant-current source outfan LED+ voltage and outputs a control signal to constant-current source；Described constant-current control circuit outputs a control signal to constant-current source for the electric current detecting the constant-current source corresponding branch road of outfan LED-；Described LED module is used for circuit output loading；
nullIn described voltage detecting and controling circuit: resistance R52 one end is connected with constant-current source outfan LED+，The resistance R52 other end respectively with resistance R55、Resistance R53、Electric capacity C35 connects，The resistance R53 other end and resistance SR1、Resistance SR2、Resistance R54 connects，Resistance SR1、Resistance SR2、Resistance R54、Electric capacity C35 other end ground connection，The resistance R55 other end is connected with resistance B2，The resistance B2 other end is connected with 2 feet and the electric capacity C37 of double operational chip U4 respectively，Electric capacity C37 is connected with resistance R57，The resistance R57 other end is connected with 1 foot and the resistance R58 of double operational chip U4，The resistance R58 other end is connected with the negative pole of diode D20，The positive pole of diode D20 is connected with resistance R60，Resistance R60 is connected with control signal wire CC_OUT，Resistance R63 one end exports VCC with constant-current source respectively、8 feet of double operational chip U4 and 5 feet、Electric capacity C38 connects，The resistance R63 other end respectively with K foot and the R foot of voltage stabilizing chip SHR1、Resistance R56 connects，The other end of resistance R56 is connected with resistance B1，The resistance B1 other end is connected with 3 feet of double operational chip U4，The electric capacity C38 other end is connected with 4 feet of double operational chip U4 and ground connection，The A foot ground connection of voltage stabilizing chip SHR1，The 6 foot ground connection of double operational chip U4.
Multiplex output circuit the most according to claim 1, it is characterised in that described voltage stabilizing chip SHR1 provides 2.5V reference voltage for described double operational chip U4.
3. according to the multiplex output circuit described in any one of claim 1 to 2, it is characterised in that described LED module is four, described constant-current control circuit is four, and four LED modules are connected with four constant-current control circuit one_to_one corresponding respectively.
Multiplex output circuit the most according to claim 3, it is characterized in that, the output branch road of described constant-current source outfan LED-is LED1-, LED2-, LED3-, LED4-, and multiple output branch roads of described constant-current source outfan LED-are connected with multiple constant-current control circuits respectively.
Multiplex output circuit the most according to claim 4, it is characterized in that, described output branch road LED1-is connected with resistance R72, the resistance R72 other end is connected with electric capacity C50, resistance B3 respectively, the electric capacity C50 other end is connected with resistance R71, resistance B3 is connected with 2 feet of four high guaily unit chip U7, the resistance R71 other end 1 foot with resistance R70, four high guaily unit chip U7 respectively is connected, resistance R70 is connected with diode D30 negative pole, and diode D30 positive pole is connected with diode D31 positive pole, diode D32 positive pole, diode D33 positive pole and control signal wire CC_OUT respectively；
Output branch road LED2-is connected with resistance R75, the resistance R75 other end is connected with electric capacity C51, resistance B5 respectively, the electric capacity C51 other end is connected with resistance R74, resistance B5 is connected with 6 feet of four high guaily unit chip U7, the resistance R74 other end 7 feet with resistance R73, four high guaily unit chip U7 respectively are connected, and resistance R73 is connected with diode D31 negative pole；
Output branch road LED3-is connected with resistance R78, the resistance R78 other end is connected with electric capacity C52, resistance B6 respectively, the electric capacity C52 other end is connected with resistance R77, resistance B6 is connected with 9 feet of four high guaily unit chip U7, the resistance R77 other end 8 feet with resistance R76, four high guaily unit chip U7 respectively are connected, and resistance R76 is connected with diode D32 negative pole；
Output branch road LED4-is connected with resistance R81, the resistance R81 other end is connected with electric capacity C53, resistance B7 respectively, the electric capacity C53 other end is connected with resistance R80, resistance B7 is connected with 12 feet of four high guaily unit chip U7, the resistance R80 other end 14 feet with resistance R79, four high guaily unit chip U7 respectively are connected, and resistance R79 is connected with diode D33 negative pole；
Resistance B4 is connected with 3 feet of four high guaily unit chip U7,5 feet, 10 feet, 13 feet respectively, and the resistance B4 other end is connected with resistance R83, resistance R83 other end ground connection.
Multiplex output circuit the most according to claim 5, it is characterised in that electric capacity C61 4 feet with VCC, four high guaily unit chip U7 respectively are connected, and the electric capacity C61 other end is connected with 11 feet of four high guaily unit chip U7 and ground connection.
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| CN201410437120.8A CN104219843B (en) | 2014-08-29 | 2014-08-29 | The multiplex output circuit of superposition current constant control framework |
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| CN104219843B true CN104219843B (en) | 2016-11-16 |
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| CN206237639U (en) | 2016-11-16 | 2017-06-09 | 洪学远 | A kind of novel intelligent traffic LED signal lamp control circuit and control machine |
| CN108880220A (en) * | 2018-07-16 | 2018-11-23 | 深圳市奋勇光电有限公司 | A kind of zero point powers on circuit |
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| JP2014117048A (en) * | 2012-12-07 | 2014-06-26 | Toshiba Lighting & Technology Corp | Dc power supply device and lighting device |
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| CN101146387A (en) * | 2007-10-10 | 2008-03-19 | 昝昕武 | A car background optical constant current control drive system and drive control method |
| CN201611970U (en) * | 2010-02-04 | 2010-10-20 | 深圳市麦格米特电气技术有限公司 | Novel multiple-way LED constant current drive circuit |
| CN103167678A (en) * | 2011-12-15 | 2013-06-19 | 常州洪荒谷电子科技有限公司 | Multipath constant current light-emitting diode (LED) drive circuit and LED drive chip |
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