CN210899726U - Trinity control interface circuit of lamps and lanterns - Google Patents
Trinity control interface circuit of lamps and lanterns Download PDFInfo
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- CN210899726U CN210899726U CN201921546199.2U CN201921546199U CN210899726U CN 210899726 U CN210899726 U CN 210899726U CN 201921546199 U CN201921546199 U CN 201921546199U CN 210899726 U CN210899726 U CN 210899726U
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Abstract
The utility model discloses a trinity control interface circuit of lamps and lanterns, including trinity control interface circuit and power master control circuit, trinity control interface circuit includes signal input circuit and chip control circuit, signal input circuit's output with chip control circuit's input electricity is connected, chip control circuit's output with power master control circuit's input electricity is connected. The utility model discloses require lower, can realize good dimming degree of depth, can not harm interface circuit itself because of abnormal operation, the compatibility of adjusting luminance is good to the condition that can avoid LED lamps and lanterns dim light.
Description
Technical Field
The utility model relates to a LED lamps and lanterns control technical field, in particular to trinity control interface circuit of lamps and lanterns.
Background
In LED lamps and lanterns application, in order to carry out dimming and on-off control to lamps and lanterns, form a trinity control signal interface standard gradually in the trade, draw two control lines more promptly at drive power supply's output to the realization is to dimming and on-off control of LED lamps and lanterns, current LED lamps and lanterns control interface circuit is shown as figure 1, and two control lines are used for 3 kinds of control signal of intelligent recognition in the picture: the LED lamp comprises an external adjustable resistor, an external PWM signal and an external 0-10V analog signal voltage, and the connection between a controller and an LED driving power supply is completed through the multifunctional interface so as to complete the multi-intelligent interconnection control of the LED lamp. In fig. 1, V + and V-are positive and negative outputs of a lamp driving power supply, D + and D-are 3-to-1 functional interface terminals, an external control signal is coupled into a circuit through D + and D-, a constant current source composed of ICs 1-B supplies power through a diode D1, three input signals (external resistor, external PWM, external 0-10V level) are converted into corresponding level signals, and the level signals are buffered and output to a DIM terminal through an IC1-a to control dimming of a main circuit, however, the lamp driving power supply has the following defects:
(1) in order to adapt to the 0-10V control signal, the power supply of the interface needs to be increased to more than 12V, and the requirement on the power supply is high;
(2) in order to prevent the LED lamp from being damaged by D + contact caused by V + of an output terminal line after the LED lamp is not discharged in a production test or a specific application occasion, a diode D1 is connected, but the existence of a diode D1 causes the circuit to be not friendly to a small input control signal close to 0, and causes insufficient dimming depth;
(3) when the signal is input with small brightness, the situation that the LED lamp flashes with small brightness is not well handled.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a trinity control interface circuit of lamps and lanterns, require lower, can realize good dimming degree of depth, can not harm interface circuit itself because of abnormal operation, the compatibility of adjusting luminance is good to the power supply to can avoid the condition of LED lamps and lanterns dim light flashing light.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a trinity control interface circuit of lamps and lanterns, includes trinity control interface circuit and power master control circuit, trinity control interface circuit includes signal input circuit and chip control circuit, signal input circuit's output with chip control circuit's input electricity is connected, chip control circuit's output with power master control circuit's input electricity is connected.
Preferably, the signal input circuit includes a functional interface terminal, a filter LF2, a resistor R1, a resistor R2, a resistor R4, a resistor R5 and a voltage regulator DZ1, one end of the functional interface terminal is connected to one end of the filter LF2, the other end of the filter LF2 is connected to one end of the resistor R5, the other end of the resistor R5, one end of the resistor R1 and one end of the resistor R4 are all grounded through the voltage regulator DZ1, and the other end of the resistor R4 is grounded through the resistor R2.
Preferably, the chip control circuit includes a single chip microcomputer chip U1, a resistor R12, a capacitor C1 and a DIM terminal, the PA2 pin of the single chip microcomputer chip U1 and the other end of the resistor R4 are both grounded through the capacitor C1, the other end of the resistor R1 is connected to the PC4 pin of the single chip microcomputer chip U1, the PC3 pin of the single chip microcomputer chip U1 and one end of the resistor R12 are both connected to one end of the DIM terminal, and the other end of the resistor R12 is grounded.
Preferably, the functional interface terminal comprises a positive interface terminal D + and a negative interface terminal D-, an external control signal is accessed to one end of the positive interface terminal D + and one end of the negative interface terminal D-, and the other end of the positive interface terminal D + and the other end of the negative interface terminal D-are connected with one end of the filter LF 2.
Preferably, a VDD pin of the single chip U1 is connected to a 5V power supply, and a VSS pin of the single chip U1 is grounded.
Preferably, the other end of the DIM terminal is connected to the input end of the power supply main control circuit.
Adopt above-mentioned technical scheme, the utility model provides a pair of trinity control interface circuit of lamps and lanterns, the output of the signal input circuit among the trinity control interface circuit of this lamps and lanterns is connected with chip control circuit's input electricity, chip control circuit's output is connected with power master control circuit's input electricity, when this signal input circuit inserts 0-10V level or PWM signal, this chip control circuit regards as the situation of active signal input promptly (input PWM signal or 0-10V analog voltage), this chip control circuit outputs the low level and starts AD conversion function and reads this input signal; when the input signal in the signal input circuit is an external resistor, the chip control circuit inputs the signal as a passive signal (an external adjustable resistor), the chip control circuit outputs a high level and starts AD conversion to read the input signal, the chip control circuit correspondingly processes the read dimming control signal and finally outputs the dimming control signal to the power supply main control circuit in a PWM signal form, and therefore dimming of the LED lamp is controlled; this trinity control interface circuit of lamps and lanterns connects external 10V control signal level with 5V even 3.3V's power supply through chip control circuit realization, thereby reduce signal input circuit's power supply requirement, it is lower to the power supply requirement, signal input circuit is very friendly to control signal, can detect very little input control signal through this signal input circuit and realize fine the degree of depth of adjusting luminance, signal input circuit's interface externally presents the high resistance state, can not harm interface circuit itself because of abnormal operation, it is compatible to adjust luminance, directly be 0 to the control signal transition within 3% through this chip control circuit, let LED lamps and lanterns close, avoid the scintillation, thereby realize avoiding the condition of LED lamps and lanterns low brightness flashing light.
Drawings
Fig. 1 is a schematic circuit diagram of a conventional LED lamp control interface circuit;
FIG. 2 is a block diagram of the present invention;
FIG. 3 is a schematic circuit diagram of the present invention;
in the figure, a 1-three-in-one control interface circuit and a 2-power main control circuit are arranged.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 2, the utility model relates to a trinity control interface circuit of lamps and lanterns in the structure block diagram, this trinity control interface circuit of lamps and lanterns includes trinity control interface circuit 1 and power master control circuit 2, the dimming signal is imported to this trinity control interface circuit 1's input, this dimming signal is including inserting 0-10V level, PWM signal and passive adjustable resistance signal 3 select 1, this trinity control interface circuit 1's output is connected with this power master control circuit 2's input, can understand, this trinity control interface circuit 1 includes signal input circuit and chip control circuit, this signal input circuit's output is connected with this chip control circuit's input electricity, this chip control circuit's output is connected with this power master control circuit 2's input electricity. It can be understood that the lamp three-in-one control interface circuit is widely applied to power dimming of LED lamps, including indoor and outdoor lamp driving power control interfaces.
Specifically, fig. 3 is the utility model relates to a trinity control interface circuit's of lamps and lanterns circuit schematic diagram, combine fig. 2 and fig. 3, this signal input circuit includes the function interface terminal, wave filter LF2, resistance R1, resistance R2, resistance R4, resistance R5 and stabilivolt DZ1, the one end and this wave filter LF 2's one end of this function interface terminal are connected, the other end and the one end of resistance R5 of this wave filter LF2 are connected, the other end of this resistance R5, the one end of resistance R1 and the one end of resistance R4 all are through stabilivolt DZ1 ground connection, the other end of this resistance R4 is through resistance R2 ground connection; the chip control circuit comprises a single chip microcomputer chip U1, a resistor R12, a capacitor C1 and a DIM terminal, wherein a PA2 pin of the single chip microcomputer chip U1 and the other end of a resistor R4 are grounded through a capacitor C1, the other end of the resistor R1 is connected with a PC4 pin of the single chip microcomputer chip U1, a PC3 pin of the single chip microcomputer chip U1 and one end of the resistor R12 are connected with one end of the DIM terminal, and the other end of the resistor R12 is grounded; the functional interface terminal comprises a positive interface terminal D + and a negative interface terminal D-, wherein one end of the positive interface terminal D + and one end of the negative interface terminal D-are both connected with an external control signal, and the other end of the positive interface terminal D + and the other end of the negative interface terminal D-are both connected with one end of the filter LF 2; the VDD pin of the single chip microcomputer chip U1 is connected to a 5V power supply, and the VSS pin of the single chip microcomputer chip U1 is grounded; the other end of the DIM terminal is connected with the input end of the power supply main control circuit 3; the power supply main control circuit 2 comprises a diode D3, a capacitor C12, a capacitor C17, a capacitor C28, a resistor R31, a resistor R66, a filter LF1, a capacitor C13, a positive drive power output end V + and a negative drive power output end V-, the anode of the diode D3 is connected with the other end of a DIM terminal, the cathode of the diode D3, one end of the capacitor C12, one end of the capacitor C17 and one end of the capacitor C28 are all connected with one end of a resistor R31, the other end of the capacitor C12, the other end of the capacitor C17, the other end of the capacitor C28, the other end of the resistor R31 and the other end of a resistor R66 are all grounded, one end of the filter 1 is respectively connected with one end of a resistor R31 and one end of a resistor R66, the positive drive power output end V + and the negative drive power output end V-are respectively connected with the other end of a filter LF1, one end of the capacitor C13 is connected with the, the other end of the capacitor C13 is connected to the negative output terminal V-of the driving power supply. It can be understood that the single chip microcomputer chip U1 can be an 80C51 chip or the like.
It can be understood that the chip control circuit 2 utilizes 3I/O ports (i.e. PA2 pin and PC4 pin and PC3 pin) on the monolithic chip U1 to implement the corresponding 3-in-1 interface function. In principle, when the signal input circuit 1 inputs a 0-10V level or a PWM signal, the situation is regarded as an active signal input (inputs PWM or 0-10V analog voltage), the pin PC4 outputs a low level, and the AD conversion function is started to read the input signal; when the input signal is an external resistor, the input signal is regarded as a passive signal (an external adjustable resistor) input condition, the pin PC4 outputs a high level, AD conversion is started to read the input signal, and the read dimming control signal is correspondingly processed and finally output to the power supply main control circuit 3 through the pin PC3 in a PWM manner. The user may randomly switch the mode of inputting the control signal, and the single chip must be able to detect and execute the corresponding strategy, so the signal processing execution mode is: when the PA2 pin detects a voltage larger than 0, the input is regarded as that an active control signal always exists, only when the voltage which is detected to be 0 is input, the input is regarded as that a passive control signal is input, and when the singlechip chip U1 judges that the passive control signal is input, an intermittent detection mode is added, the PC4 pin controls the SW network to switch between 0 and high level, the switching to the high level is detected to be a dimming control value under an external resistor mode and is standby, if the SW network is switched to the 0 level, the PA2 pin detects a level higher than 0, the active control signal is input, the standby value is abandoned, and the detection mode corresponding to the active signal input is switched. In practice, the decision threshold is not set to 0 for interference rejection purposes, but rather to a value slightly larger than 0.
It can be understood that the utility model relates to a rationally, the structure is unique, has solved some defects that conventional interface circuit exists and has following advantage: (1) the power supply can be supplied by 5V or even 3.3V to be connected with an external 10V control signal level; (2) the method is friendly to control signals, and can detect very small input control signals to realize very good dimming depth; (3) the interface is in a high-impedance state, the interface circuit is not damaged due to abnormal operation, and D + is not damaged when being short-circuited to V + for a long time; (4) the dimming compatibility problem of the LED lamp is solved by using the single chip microcomputer chip U1, for example, some LED lamps are turned to the low brightness of 2% and can flash, the control signal of 3% can be directly transited to 0 through the single chip microcomputer control circuit, so that the LED lamp is turned off, and the flash is avoided. If the light brightness of the LED lamp is required to change along with the control signal not according to the linear rule but according to the exponential rule, the problem can be solved easily through the three-in-one control interface circuit of the lamp.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. The utility model provides a trinity control interface circuit of lamps and lanterns, includes trinity control interface circuit and power master control circuit, its characterized in that: the trinity control interface circuit includes signal input circuit and chip control circuit, signal input circuit's output with chip control circuit's input electricity is connected, chip control circuit's output with power master control circuit's input electricity is connected.
2. The three-in-one control interface circuit of the lamp as claimed in claim 1, wherein: the signal input circuit comprises a functional interface terminal, a filter LF2, a resistor R1, a resistor R2, a resistor R4, a resistor R5 and a voltage-regulator tube DZ1, wherein one end of the functional interface terminal is connected with one end of the filter LF2, the other end of the filter LF2 is connected with one end of the resistor R5, the other end of the resistor R5, one end of the resistor R1 and one end of the resistor R4 are all grounded through the voltage-regulator tube DZ1, and the other end of the resistor R4 is grounded through the resistor R2.
3. The three-in-one control interface circuit of the lamp as claimed in claim 2, wherein: the chip control circuit comprises a single chip microcomputer chip U1, a resistor R12, a capacitor C1 and a DIM terminal, wherein the PA2 pin of the single chip microcomputer chip U1 and the other end of the resistor R4 are grounded through the capacitor C1, the other end of the resistor R1 is connected with the PC4 pin of the single chip microcomputer chip U1, the PC3 pin of the single chip microcomputer chip U1 and one end of the resistor R12 are connected with one end of the DIM terminal, and the other end of the resistor R12 is grounded.
4. The three-in-one control interface circuit of the lamp as claimed in claim 2, wherein: the function interface terminal comprises a positive interface terminal D + and a negative interface terminal D-, an external control signal is connected to one end of the positive interface terminal D + and one end of the negative interface terminal D-, and the other end of the positive interface terminal D + and the other end of the negative interface terminal D-are connected with one end of the filter LF 2.
5. The three-in-one control interface circuit of the lamp as claimed in claim 3, wherein: the VDD pin of the single chip U1 is connected to a 5V power supply, and the VSS pin of the single chip U1 is grounded.
6. The three-in-one control interface circuit of the lamp as claimed in claim 3, wherein: and the other end of the DIM terminal is connected with the input end of the power supply main control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921546199.2U CN210899726U (en) | 2019-09-17 | 2019-09-17 | Trinity control interface circuit of lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921546199.2U CN210899726U (en) | 2019-09-17 | 2019-09-17 | Trinity control interface circuit of lamps and lanterns |
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| Publication Number | Publication Date |
|---|---|
| CN210899726U true CN210899726U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921546199.2U Active CN210899726U (en) | 2019-09-17 | 2019-09-17 | Trinity control interface circuit of lamps and lanterns |
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| CN (1) | CN210899726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278977A (en) * | 2022-09-29 | 2022-11-01 | 广东东菱电源科技有限公司 | Three-in-one dimming power supply cascade control circuit with external adjustable resistor |
-
2019
- 2019-09-17 CN CN201921546199.2U patent/CN210899726U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278977A (en) * | 2022-09-29 | 2022-11-01 | 广东东菱电源科技有限公司 | Three-in-one dimming power supply cascade control circuit with external adjustable resistor |
| CN115278977B (en) * | 2022-09-29 | 2022-12-09 | 广东东菱电源科技有限公司 | Three-in-one dimming power supply cascade control circuit with external adjustable resistor |
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