CN111343747B - Circuit for enhancing load carrying capacity of 0-10V dimming signal and implementation method - Google Patents
Circuit for enhancing load carrying capacity of 0-10V dimming signal and implementation method Download PDFInfo
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Abstract
The invention discloses a circuit for enhancing the carrying capacity of a 0-10V dimming signal, which comprises a voltage-emitting and following circuit, wherein the normal phase input end of the voltage-emitting and following circuit is connected with a 0-10V voltage input signal, the output end of the voltage-emitting and following circuit is connected with the input end of a push-pull output circuit, and the output end of the push-pull output circuit is respectively connected with a port P1, the reverse phase input end of the voltage-emitting and following circuit and an N-channel MOS switch control circuit; the invention also discloses a method for realizing the circuit for enhancing the carrying capacity of the 0-10V dimming signal. The invention effectively improves the load capacity of 0-10V signal output and realizes the application of centralized dimming control; according to the invention, the N-channel MOS transistor Q3 is adopted for controlling the pull-down, so that the pull-down capability of 0-10V dimming is realized, and when the MCU actively judges that the low-end dead zone voltage (junction voltage of the PNP triode Q2) is output by 0-10V, the N-channel MOS transistor Q3 is controlled to be conducted so as to realize the effective 0V output to the ground of a dimming signal.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly relates to a circuit for enhancing the carrying capacity of a 0-10V dimming signal and an implementation method thereof.
Background
In the modern electronic technology field, with the popularization of intelligent lighting application, the application of the existing LED dimming control technology is also significant.
At present, the dimming driving power supply of the LED industrial and mining lamp for industrial illumination and various professional illumination lamps supports 0-10V signal dimming control, and most of the existing 0-10V dimming controllers adopt operational amplifiers to output 0-10V dimming signals, so that single-lamp dimming control can be met, but the driving current of the operational amplifiers to output is smaller, and in the application occasion of centralized dimming of a plurality of LED dimming power supplies, the normal 0-10V dimming signals cannot be output due to limited output current capacity, so that the dimming control failure phenomenon is caused.
Disclosure of Invention
The present invention is directed to a circuit for enhancing the load capacity of a 0-10V dimming signal, so as to solve the above-mentioned problems in the prior art. The circuit for enhancing the load capacity of the 0-10V dimming signal has the characteristics of effectively improving the load capacity of the 0-10V signal output and realizing centralized dimming control application.
The invention further aims to provide a realization method of the circuit for enhancing the carrying capacity of the 0-10V dimming signal.
In order to achieve the above purpose, the present invention provides the following technical solutions: a circuit for enhancing the carrying capacity of a 0-10V dimming signal comprises a voltage injection follower circuit, wherein the normal phase input end of the voltage injection follower circuit is connected with a 0-10V voltage input signal, the output end of the voltage injection follower circuit is connected with the input end of a push-pull output circuit, and the output end of the push-pull output circuit is respectively connected with a port P1, the reverse phase input end of the voltage injection follower circuit and an N-channel MOS switch control circuit.
In the invention, the voltage-dependent circuit comprises an operational amplifier U1, wherein a positive input end 5 pin of the operational amplifier U1 is connected with a 0-10V voltage input signal, an output end 7 pin of the operational amplifier U1 is connected with an input end of the push-pull output circuit, a negative input end 6 pin of the operational amplifier U1 is connected with an output end of the push-pull output circuit, a power supply positive electrode 8 pin of the operational amplifier U1 is connected with a 12V positive electrode of a power supply, and a ground end 4 pin of the operational amplifier U1 is connected with a power supply ground end.
In the invention, the push-pull output circuit comprises an NPN triode Q1, wherein the base electrode of the NPN triode Q1 is connected with the pin 7 of the output end of the operational amplifier U1, the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V, and the emitter electrode of the NPN triode Q1 is the output end of the push-pull output circuit.
In the invention, the push-pull output circuit further comprises a PNP triode Q2, wherein the base electrode of the PNP triode Q2 is connected with the pin 7 of the output end of the operational amplifier U1, the cathode of the PNP triode Q2 is connected with the power supply grounding end, and the emitter of the PNP triode Q2 is the output end of the push-pull output circuit.
In the invention, the push-pull output circuit further comprises a resistor R1, one end of the resistor R1 is connected with the pin 7 of the output end of the operational amplifier U1, and the other end of the resistor R1 is the output end of the push-pull output circuit.
In the invention, the N-channel MOS switch control circuit comprises an N-channel MOS tube Q3, wherein the drain electrode of the N-channel MOS tube Q3 is connected with the output end of the push-pull output circuit, and the source electrode of the N-channel MOS tube Q3 is connected with the power supply grounding end.
In the invention, the N-channel MOS switch control circuit further comprises a resistor R2, one end of the resistor R2 is connected with the gate of the N-channel MOS tube Q3, and the other end of the resistor R2 is connected with the output control pin of the MCU.
In the invention, the N-channel MOS switch control circuit further comprises a resistor R3, one end of the resistor R3 is connected with the gate of the N-channel MOS tube Q3, and the other end of the resistor R3 is connected with the power supply grounding end.
In the invention, the realization method of the circuit for enhancing the carrying capacity of the 0-10V dimming signal comprises the following steps:
the base electrode of the NPN triode Q1 is connected with the pin 7 of the output end of the operational amplifier U1, and the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V to realize output current driving;
the base electrode of the PNP triode Q2 is connected with the pin 7 of the output end of the operational amplifier U1, and the negative electrode of the PNP triode Q2 is connected with the power supply grounding end, so that input pull current driving is realized;
one end of the resistor R1 is connected with the pin 7 of the output end of the operational amplifier U1, so that the NPN triode Q1 and the PNP triode Q2 can work in an effective amplifying area;
and fourthly, the drain electrode of the N channel MOS tube Q3 is connected with the output end of the push-pull output circuit, and the source electrode of the N channel MOS tube Q3 is connected with the power supply grounding end, so that the effective 0V-to-ground output of the dimming signal is realized.
In the implementation method of the circuit for enhancing the carrying capacity of the 0-10V dimming signal, the voltage-dependent circuit comprises an operational amplifier U1, a positive phase input end 5 pin of the operational amplifier U1 is connected with a 0-10V voltage input signal, an output end 7 pin of the operational amplifier U1 is connected with an input end of a push-pull output circuit, an inverting input end 6 pin of the operational amplifier U1 is connected with an output end of the push-pull output circuit, a power supply positive electrode 8 pin of the operational amplifier U1 is connected with a 12V positive electrode of a power supply, a ground end 4 pin of the operational amplifier U1 is connected with a power supply ground end, an emitter of an NPN triode Q1 is an output end of the push-pull output circuit, an emitter of a PNP triode Q2 is an output end of the push-pull output circuit, the other end of the resistor R1 is an output end of the push-pull output circuit, one end of the resistor R2 is connected with a gate electrode of an N channel MOS tube Q3, the other end of the resistor R2 is connected with an output control pin of an MCU, and the other end of the resistor R3 is connected with the gate of the N channel MOS tube Q3.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention effectively improves the load capacity of 0-10V signal output and realizes the application of centralized dimming control;
2. according to the invention, the N-channel MOS transistor Q3 is adopted for controlling the pull-down, so that the pull-down capability of 0-10V dimming is realized, and when the dead zone voltage (junction voltage of the PNP triode Q2) at the low end is output by actively judging 0-10V through the MCU, the N-channel MOS transistor Q3 is controlled to be conducted so as to realize the effective 0V output to the ground of a dimming signal;
3. the circuit of the invention is simple and ensures the stability and reliability of operation.
4. The invention realizes the cluster dimming control application of the dimmer for carrying out centralized dimming control on multiple lamps through the parallel connection of 0-10V dimming signals, and expands the application field of centralized dimming of 0-10V dimming signals in a large area.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of the present invention;
FIG. 2 is a schematic diagram of a voltage follower circuit according to the present invention;
FIG. 3 is a schematic diagram of a push-pull output circuit according to the present invention;
FIG. 4 is a schematic diagram of the structure of the N-channel MOS switch control circuit according to the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-4, the present invention provides the following technical solutions: a circuit for enhancing the carrying capacity of a 0-10V dimming signal comprises a voltage-dependent circuit and is characterized in that: the positive phase input end of the voltage injection follower circuit is connected with a 0-10V voltage input signal, the output end of the voltage injection follower circuit is connected with the input end of the push-pull output circuit, and the output end of the push-pull output circuit is respectively connected with the port P1, the reverse phase input end of the voltage injection follower circuit and the N channel MOS switch control circuit.
Further, the voltage shoot-and-follow circuit comprises an operational amplifier U1, a positive phase input end 5 pin of the operational amplifier U1 is connected with a 0-10V voltage input signal, an output end 7 pin of the operational amplifier U1 is connected with an input end of the push-pull output circuit, a negative phase input end 6 pin of the operational amplifier U1 is connected with an output end of the push-pull output circuit, a power supply positive pole 8 pin of the operational amplifier U1 is connected with a 12V positive pole of a power supply, and a grounding end 4 pin of the operational amplifier U1 is connected with a power supply grounding end.
By adopting the technical scheme, the voltage follower circuit mainly realizes the voltage follower function of the 0-10V dimming signal.
Further, the push-pull output circuit comprises an NPN triode Q1, a PNP triode Q2 and a resistor R1, wherein the base electrode of the NPN triode Q1, the base electrode of the PNP triode Q2 and one end of the resistor R1 are all connected with the pin 7 of the output end of the operational amplifier U1, the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V, the negative electrode of the PNP triode Q2 is connected with the power supply grounding end, and the emitter electrode of the NPN triode Q1, the emitter electrode of the PNP triode Q2 and the other end of the resistor R1 are simultaneously connected with the pin 6 of the inverting input end of the operational amplifier U1, the drain electrode of the N channel MOS tube Q3 and the pin 1 of the port P1.
By adopting the technical scheme, the push-pull output circuit mainly realizes the improvement of the load capacity of the output current with 0-10V; the NPN triode Q1 realizes output current driving; PNP triode Q2 realizes the input and draws the current to drive; resistor R1 ensures that NPN transistor Q1 and PNP transistor Q2 operate in an effective amplification region.
Further, the N-channel MOS switch control circuit comprises an N-channel MOS tube Q3, a resistor R2 and a resistor R3, wherein the drain electrode of the N-channel MOS tube Q3 is connected with the output end of the push-pull output circuit, the inverting input end 6 pin of the operational amplifier U1 and the 1 pin of the port P1, the source electrode of the N-channel MOS tube Q3 is connected with the power supply grounding end, the gate electrode of the N-channel MOS tube Q3 is respectively connected with one end of the resistor R2 and one end of the resistor R3, the other end of the resistor R3 is connected with the power supply grounding end, and the other end of the resistor R2 is connected with the output control pin of the MCU.
By adopting the technical scheme, the N-channel MOS switch control circuit mainly realizes that the dimming signal can effectively output the dimming signal with the voltage of 0V, and avoids that the dimming signal with the voltage of 0V cannot be effectively output due to the junction voltage of the triode.
Further, the implementation method of the circuit for enhancing the carrying capacity of the 0-10V dimming signal comprises the following steps:
the base electrode of the NPN triode Q1 is connected with the pin 7 of the output end of the operational amplifier U1, and the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V to realize output current driving;
the base electrode of the PNP triode Q2 is connected with the pin 7 of the output end of the operational amplifier U1, and the negative electrode of the PNP triode Q2 is connected with the power supply grounding end, so that input pull current driving is realized;
one end of the resistor R1 is connected with the pin 7 of the output end of the operational amplifier U1, so that the NPN triode Q1 and the PNP triode Q2 can work in an effective amplifying area;
and fourthly, the drain electrode of the N channel MOS tube Q3 is connected with the output end of the push-pull output circuit, and the source electrode of the N channel MOS tube Q3 is connected with the power supply grounding end, so that the effective 0V-to-ground output of the dimming signal is realized.
The resistor R1, the resistor R2, and the resistor R3 in this embodiment are all static bias resistors.
The dimming signal load current can also realize adjustment of different carrying capacities by replacing triodes (NPN triode Q1 and PNP triode Q2) with different powers in the push-pull output circuit, and the normal phase input of the voltage-dependent circuit is a 0-10V signal generated by the PWM wave output by the front MCU after multistage RC filtering and amplification, so that the amplitude MCU end for outputting 0-10V voltage at present is a predictable value. When the voltage output by the push-pull output circuit is smaller than or equal to the junction voltage dead zone of the PNP triode Q2, the MCU outputs a high level to control the conduction of the N channel MOS tube Q3, and the output is pulled down to the ground, so that effective 0V output is realized, and the normal output control of the dimming signal is ensured.
In conclusion, the invention effectively improves the load capacity of 0-10V signal output and realizes the application of centralized dimming control; according to the invention, the N-channel MOS transistor Q3 is adopted for controlling the pull-down, so that the pull-down capability of 0-10V dimming is realized, and when the MCU actively judges that the low-end dead zone voltage (junction voltage of the PNP triode Q2) is output by 0-10V, the N-channel MOS transistor Q3 is controlled to be conducted so as to realize the effective 0V output to the ground of a dimming signal.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A circuit for enhancing the carrying capacity of a 0-10V dimming signal comprises a voltage-dependent circuit and is characterized in that: the positive phase input end of the voltage injection follower circuit is connected with a 0-10V voltage input signal, the output end of the voltage injection follower circuit is connected with the input end of the push-pull output circuit, and the output end of the push-pull output circuit is respectively connected with the port P1, the reverse phase input end of the voltage injection follower circuit and the N channel MOS switch control circuit;
the voltage-dependent circuit comprises an operational amplifier U1, wherein a positive phase input end 5 pin of the operational amplifier U1 is connected with a 0-10V voltage input signal, an output end 7 pin of the operational amplifier U1 is connected with an input end of the push-pull output circuit, a negative phase input end 6 pin of the operational amplifier U1 is connected with an output end of the push-pull output circuit, a power supply positive pole 8 pin of the operational amplifier U1 is connected with a 12V positive pole of a power supply, and a ground end 4 pin of the operational amplifier U1 is connected with a power supply ground end;
the push-pull output circuit comprises an NPN triode Q1, wherein the base electrode of the NPN triode Q1 is connected with the pin 7 of the output end of the operational amplifier U1, the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V, and the emitter electrode of the NPN triode Q1 is the output end of the push-pull output circuit;
the push-pull output circuit also comprises a PNP triode Q2, wherein the base electrode of the PNP triode Q2 is connected with the pin 7 of the output end of the operational amplifier U1, the cathode of the PNP triode Q2 is connected with the power supply grounding end, and the emitter of the PNP triode Q2 is the output end of the push-pull output circuit;
the N-channel MOS switch control circuit comprises an N-channel MOS tube Q3, wherein the drain electrode of the N-channel MOS tube Q3 is connected with the output end of the push-pull output circuit, and the source electrode of the N-channel MOS tube Q3 is connected with the power supply grounding end.
2. A circuit for enhancing the load carrying capability of a 0-10V dimming signal as claimed in claim 1, wherein: the push-pull output circuit further comprises a resistor R1, one end of the resistor R1 is connected with the pin 7 of the output end of the operational amplifier U1, and the other end of the resistor R1 is the output end of the push-pull output circuit.
3. A circuit for enhancing the load carrying capability of a 0-10V dimming signal as claimed in claim 1, wherein: the N-channel MOS switch control circuit further comprises a resistor R2, one end of the resistor R2 is connected with the gate of the N-channel MOS tube Q3, and the other end of the resistor R2 is connected with the output control pin of the MCU.
4. A circuit for enhancing the load carrying capability of a 0-10V dimming signal as claimed in claim 1, wherein: the N-channel MOS switch control circuit further comprises a resistor R3, one end of the resistor R3 is connected with the gate of the N-channel MOS tube Q3, and the other end of the resistor R3 is connected with the power supply grounding end.
5. The method of implementing a circuit for enhancing the load carrying capacity of a 0-10V dimming signal according to any one of claims 1-4, comprising the steps of:
the base electrode of the NPN triode Q1 is connected with the pin 7 of the output end of the operational amplifier U1, and the collector electrode of the NPN triode Q1 is connected with the positive electrode of the power supply 12V to realize output current driving;
the base electrode of the PNP triode Q2 is connected with the pin 7 of the output end of the operational amplifier U1, and the negative electrode of the PNP triode Q2 is connected with the power supply grounding end, so that input pull current driving is realized;
one end of the resistor R1 is connected with the pin 7 of the output end of the operational amplifier U1, so that the NPN triode Q1 and the PNP triode Q2 can work in an effective amplifying area;
and fourthly, the drain electrode of the N channel MOS tube Q3 is connected with the output end of the push-pull output circuit, and the source electrode of the N channel MOS tube Q3 is connected with the power supply grounding end, so that the effective 0V-to-ground output of the dimming signal is realized.
6. The method for implementing the circuit for enhancing the load capacity of the 0-10V dimming signal according to claim 5, wherein the method comprises the following steps: the voltage-dependent circuit comprises an operational amplifier U1, a positive input end 5 pin of the operational amplifier U1 is connected with a 0-10V voltage input signal, an output end 7 pin of the operational amplifier U1 is connected with an input end of a push-pull output circuit, a negative input end 6 pin of the operational amplifier U1 is connected with an output end of the push-pull output circuit, a power supply positive electrode 8 pin of the operational amplifier U1 is connected with a 12V positive electrode of a power supply, a grounding end 4 pin of the operational amplifier U1 is connected with a power supply grounding end, an emitter of an NPN triode Q1 is an output end of the push-pull output circuit, an emitter of a PNP triode Q2 is an output end of the push-pull output circuit, the other end of the resistor R1 is an output end of the push-pull output circuit, the N channel MOS switch control circuit further comprises a resistor R2, one end of the resistor R2 is connected with a gate of the N channel MOS tube Q3, and the other end of the resistor R3 is connected with a gate of the N channel MOS tube Q3.
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| CN110708828A (en) * | 2019-10-21 | 2020-01-17 | 勤上光电股份有限公司 | Relay amplifier circuit of dimming control system |
| CN211744792U (en) * | 2020-04-29 | 2020-10-23 | 横店集团得邦照明股份有限公司 | Circuit for enhancing load capacity of 0-10V dimming signal |
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2020
- 2020-04-29 CN CN202010354931.7A patent/CN111343747B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205178996U (en) * | 2015-12-16 | 2016-04-20 | 西安森派电子技术有限公司 | Audio signal amplifier circuit |
| US9681514B1 (en) * | 2016-10-27 | 2017-06-13 | Crestron Electronics, Inc. | Dimmer configured for providing sinking and sourcing current outputs |
| CN208836431U (en) * | 2018-06-23 | 2019-05-07 | 上海欧切斯实业有限公司 | A kind of isolation 1-10V dim signal converter |
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