CN218217754U - Anti-reverse connection circuit, driving power supply and lamp - Google Patents
Anti-reverse connection circuit, driving power supply and lamp Download PDFInfo
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- CN218217754U CN218217754U CN202220787600.7U CN202220787600U CN218217754U CN 218217754 U CN218217754 U CN 218217754U CN 202220787600 U CN202220787600 U CN 202220787600U CN 218217754 U CN218217754 U CN 218217754U
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Abstract
The utility model provides an anti-reverse connection circuit, a driving power supply and a lamp, which at least comprises a rectification circuit, a filter circuit and a current limiting circuit; the input end of the rectifying circuit is connected with the input signal line in a forward direction or a reverse direction, the output end of the rectifying circuit is respectively connected with the filter circuit and the current limiting circuit, and the rectifying circuit outputs signals to the post-stage circuit through the current limiting circuit. The beneficial effects are as follows: the lamp is still normally adjustable and controllable when signal lines are reversely connected, and troubles of the lamp during installation and wiring are reduced.
Description
Technical Field
The utility model relates to a lamps and lanterns circuit technical field, more specifically relates to prevent reverse connection circuit, drive power supply and lamps and lanterns.
Background
At present, the 0-10V lamps in the market are not usually subjected to reverse connection prevention processing, when the lamps are installed and wired, the positive and negative of a 0-10V signal line need to be distinguished, or in a magnetic attraction guide rail type 0-10V lamp, because the positive and negative of a guide rail and the signal input end of the lamp cannot be determined, the lamp cannot be regulated and controlled due to reverse connection, and the lamp can only be detected by adopting light adjusting equipment after the lamp is electrified and connected. In addition, some 0-10V lamps flicker at the lowest brightness, and the user experience is not good.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome among the above-mentioned background art reversal and can lead to the unable regulation and control of lamps and lanterns and can the defect of scintillation when minimum luminance, provide and prevent reverse connection circuit, drive power supply and lamps and lanterns.
An anti-reverse connection circuit at least comprises a rectification circuit, a filter circuit and a current limiting circuit;
the input end of the rectifying circuit is connected with the input signal line in a forward direction or a reverse direction, the output end of the rectifying circuit is respectively connected with the filter circuit and the current limiting circuit, and the rectifying circuit outputs signals to the post-stage circuit through the current limiting circuit.
Optionally, the rectifier circuit includes a rectifier bridge, the rectifier bridge is provided with a first input end, a second input end, a first output end, and a second output end, the first input end and the second input end are connected with the signal line, the first output end is connected with the filter circuit and the current limiting circuit, respectively, and the second output end is grounded.
Optionally, the filter circuit at least includes a first resistor and a fourth capacitor, the first resistor and the fourth capacitor are connected to the first input terminal, and the other ends of the first resistor and the fourth capacitor are grounded.
Optionally, the current limiting circuit at least includes a second resistor, one end of the second resistor is connected to the first input end, and the other end of the second resistor is connected to the post-stage circuit.
Optionally, the protection circuit further comprises a protection circuit, the protection circuit at least comprises a first capacitor and a voltage regulator tube, one end of the first capacitor and one end of the voltage regulator tube are connected with the output end of the current limiting circuit, and the other end of the first capacitor and the other end of the voltage regulator tube are grounded.
In addition, the application also provides a driving power supply which at least comprises a dimming driving circuit, a constant current driving circuit and the reverse connection prevention circuit, wherein the output end of the reverse connection prevention circuit is connected with the dimming driving circuit; the dimming driving circuit is connected with the constant current driving circuit and drives the light emitting diode through the constant current driving circuit.
Optionally, the dimming driving circuit comprises at least a dimming chip,
the dimming chip is provided with a first power supply end, a first signal end and an enabling output end, the first power supply end is connected with an input power supply, the first signal end is connected with the output end of the reverse connection preventing circuit, and the enabling output end is connected with the constant current driving circuit.
Optionally, the dimming driving circuit further includes an enable conduction circuit, the enable conduction circuit at least includes a triode, a third resistor and a fourth resistor, a base of the triode is connected with the enable output terminal through the third resistor, a collector is connected with the input power supply through the fourth resistor, and an emitter is grounded; and the collector of the triode is also connected with the constant current driving circuit and outputs an enable signal.
Optionally, the constant current driving circuit includes a constant current chip and a constant current output circuit;
the constant current chip is provided with a second power supply end, an enabling input end, a driving end and a detection end, the second power supply end is respectively connected with a fifth capacitor and an input power supply, and the enabling input end is connected with a collector electrode of the triode; the driving end and the detection end are both connected with one end of a light-emitting diode, and the other end of the light-emitting diode is connected with an input power supply;
the constant current output circuit at least comprises a first diode, a first inductor, a sixth capacitor and a sixth resistor, wherein the first diode and the first inductor are connected with the driving end, the other end of the first inductor is respectively connected with the sixth capacitor and the sixth resistor, the other end of the sixth resistor is connected with the light emitting diode, and the other ends of the first diode and the sixth capacitor are connected with the input power supply.
In addition, this application still provides a lamps and lanterns, including foretell anti-reverse connection circuit.
Compared with the prior art, its beneficial effect is: the lamp is still normally adjustable and controllable when signal lines are reversely connected, and troubles of the lamp during installation and wiring are reduced. Meanwhile, in the dimming effect, the dimming depth can be changed by setting the lowest adjustable current, the lamp can be prevented from being turned off when the signal is at a low input voltage, or the problem of lamp flickering when the signal is at a low brightness is avoided, and the user experience is improved.
Drawings
Fig. 1 is a schematic diagram of an anti-reverse connection circuit of the present invention.
Fig. 2 is a schematic diagram of a driving power supply of the circuit of the present invention.
Fig. 3 is a schematic circuit diagram of the circuit of the present invention.
Fig. 4 is a schematic diagram of the constant current driving circuit of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
in the case of the example 1, the following examples are given,
in the embodiments shown in fig. 1 and fig. 3, the present application provides an anti-reverse connection circuit, which at least includes a rectification circuit 1, a filter circuit 3, and a current limiting circuit 2; the input end of the rectifying circuit 1 is connected with the input signal line in a forward direction or a reverse direction, and the output end of the rectifying circuit 1 is respectively connected with the filter circuit 3 and the current limiting circuit 2 and outputs signals to the post-stage circuit through the current limiting circuit 2. In this embodiment, a dimming signal of 0-10V is input to the input terminal of the rectifier circuit 1, and rectified by the rectifier circuit 1, the electrical signal of the input signal line generates a high periodic voltage spike after rectification, and is filtered by the filter circuit 3, and then the current input to the post-stage circuit is limited by the current limiting circuit 2, so as to avoid burning out the post-stage circuit. The post-stage circuit can be a dimming driving circuit and a constant current driving circuit. According to the lamp, the rectifying circuit 1, the filter circuit 3 and the current limiting circuit 2 are arranged to form the reverse connection preventing circuit of the 0-10V signal end, when signal lines are reversely connected, the lamp can still be normally regulated and controlled, and troubles of the lamp in installation and wiring are reduced. Meanwhile, in the dimming effect, the dimming depth can be changed by setting the lowest adjustable current, the lamp can be prevented from being turned off when the signal is at a low input voltage, or the problem of lamp flickering when the signal is at a low brightness is avoided, and the user experience is improved.
In the case of the example 2, the following examples are given,
in some embodiments, the rectifier circuit 1 includes a rectifier bridge BD1, the rectifier bridge BD1 is provided with a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal and the second input terminal are connected to the input signal line, the first output terminal is respectively connected to the filter circuit 3 and the current limiting circuit 2, and the second output terminal is grounded. In this embodiment, the first input end and the second input end of the rectifier bridge BD1 may be connected to the positive pole DIM + and the negative pole DIM-of the input signal line in a forward direction or in a reverse direction, wherein the first input end and the second input end are respectively connected to the positive pole DIM + and the negative pole DIM-in a forward direction; the first input end and the second input end are respectively connected with the negative electrode DIM + and the positive electrode DIM-in a reverse direction. The rectifier bridge BD1 may be replaced by four diodes or other circuit elements.
In the case of the embodiment 3, the following examples,
in some embodiments, the filter circuit 3 at least includes a first resistor R1 and a fourth capacitor C4, the first resistor R1 and the fourth capacitor C4 are connected to the first input terminal, and the other ends of the first resistor R1 and the fourth capacitor C4 are grounded. In the present embodiment, the higher periodic voltage spikes generated by the input signal line output to the rectifier bridge are filtered by the first resistor R1 and the fourth capacitor C4. Through the peak value of the voltage peak after the actual measurement bridge, the first resistor R1 can be changed into a resistor with 2 or more than K omega levels in parallel connection, so that the power of the resistor is reduced.
In the case of the example 4, the following examples are given,
in some embodiments, the current limiting circuit 2 includes at least a second resistor R2, one end of the second resistor R2 is connected to the first input terminal, and the other end of the second resistor R2 is connected to the subsequent circuit. In this embodiment, the current is limited by the resistor R2, so as to limit the current flowing into the post-stage circuit and avoid burning out the post-stage circuit.
In the case of the example 5, the following examples were conducted,
in some embodiments, the filter circuit 3 at least includes a first resistor R1 and a fourth capacitor C4, the first resistor R1 and the fourth capacitor C4 are connected to the first input terminal, and the other ends of the first resistor R1 and the fourth capacitor C4 are grounded. The current limiting circuit 2 at least comprises a second resistor R2, one end of the second resistor R2 is connected with the first input end, and the other end of the second resistor R2 is connected with the rear-stage circuit. In this embodiment, the current of the 0-10V signal can be controlled by setting the first resistor R1 and the second resistor R2, and further the lowest adjustable brightness of the lamp can be changed.
In the case of the example 6, it is shown,
in some embodiments, the protection circuit further comprises a first capacitor C1 and a voltage regulator tube ZD1, one end of the first capacitor C1 and the voltage regulator tube is connected with the output end of the current limiting circuit 2, and the other end of the first capacitor C1 and the voltage regulator tube ZD1 is grounded. In this embodiment, a 10V voltage regulator ZD1 may be used at the output of the current limiting circuit 2 to stabilize, and a bypass capacitor may be connected in parallel to filter out high frequency noise, so as to protect the subsequent circuit.
In the case of the example 7, the following examples are given,
in some embodiments, referring to fig. 1 to 4, the present application further provides a driving power supply, which at least includes a dimming driving circuit, a constant current driving circuit, and one of the above-mentioned reverse connection prevention circuits, wherein an output end of the reverse connection prevention circuit is connected to the dimming driving circuit, and the dimming driving circuit is connected to the constant current driving circuit and drives the light emitting diode through the constant current driving circuit. In this embodiment, the dimming driving circuit is connected to the input signal line through the reverse connection preventing circuit, acquires and recognizes an electrical signal of the external dimming terminal, outputs an enable signal to the constant current driving circuit, and controls the LED to be turned on or turned off through the constant current driving circuit.
In the case of the example 8, the following examples are given,
in some embodiments, the dimming driving circuit at least includes a dimming chip U1, the dimming chip U1 is provided with a first power terminal U1_ VIN, a first signal terminal U1_ dim, and an enable output terminal U1_ PWM, the first power terminal U1_ VIN is connected to the input power supply, the first signal terminal U1_ dim is connected to the output terminal of the anti-reverse connection circuit, and the enable output terminal U1_ PWM is connected to the constant current driving circuit. The dimming chip U1 can be a chip with a model SY5867, a first power supply end U1_ VIN is used for inputting the power supply voltage of the chip, and the input power is filtered through a third capacitor C3. The first signal terminal U1_ dim is used for receiving a signal transmitted from the input signal line through the anti-reverse connection circuit. The enable output terminal U1_ PWM is used for outputting an enable signal to the constant current driving circuit at the rear end. The dimming chip U1 is further provided with a second pin and a third pin, the third pin is grounded through a fifth resistor R5, and the third pin is grounded through a second capacitor C2.
In an implementation manner of the foregoing embodiment, the dimming driving circuit further includes an enable conduction circuit, where the enable conduction circuit at least includes a transistor Q3, a third resistor R3, and a fourth resistor R4, a base of the transistor Q3 is connected to the enable output terminal through the third resistor R3, a collector of the transistor Q3 is connected to the input power supply through the fourth resistor R4, and an emitter of the transistor Q is grounded; and the collector of the triode Q3 is also connected with the constant current driving circuit and outputs an enable signal. The application outputs signals to a post-stage circuit such as the constant current driving circuit 4 through the enable conduction circuit. When the enable output terminal U1_ PWM is at a high level, the transistor Q3 is turned on, and a low level is input to the constant current driving circuit 4. When the enable output terminal U1_ PWM is at a low level, the transistor Q3 is turned off, and the enable input terminal is connected to the input power source VIN through the fourth resistor R4 to input a high level to the constant current driving circuit.
In the case of the example 9, the following examples are given,
in some embodiments, the constant current driving circuit comprises a constant current chip U2 and a constant current output circuit; the constant current chip U2 is provided with a second power supply end U2_ VIN, an enabling input end U2_ PWM, a driving end U2_ SW and a detecting end U2_ CS, the second power supply end is respectively connected with a fifth capacitor C5 and an input power VIN, and the enabling input end U2_ PWM is connected with a collector of the triode Q3; the driving end U2_ SW and the detecting end U2_ CS are both connected with one end of a light-emitting diode (LED), and the other end of the LED is connected with an input power supply VIN; the constant current output circuit at least comprises a first diode D1, a first inductor L1, a sixth capacitor C6 and a sixth resistor R6, the first diode D1 and the first inductor L1 are connected with the driving end, the other end of the first inductor L1 is connected with the sixth capacitor C6 and the sixth resistor R6 respectively, the other end of the sixth resistor R6 is connected with the light emitting diode LED, and the other ends of the first diode and the sixth capacitor are connected with the input power supply. In this embodiment, the constant current chip U2 of the present application may be a chip with a model of DIO 8280. The enabling input end U2_ PWM is connected with the enabling conducting circuit and used for obtaining enabling output end U1_ PWM signals, and the current flowing through the light emitting diode LED is adjusted by receiving the enabling output end U1_ PWM signals. The second power supply terminal U2_ VIN is connected to the input power supply VIN, and is configured to obtain a supply voltage of the constant current chip U2. The driving end U2_ SW is connected with the light emitting diode and used for driving the first light emitting diode LED to be turned on or turned off. The constant current output circuit is used for outputting a constant current and driving the LED.
In the working example 10, the method comprises the following steps of,
in some embodiments, the present application further provides a lamp including the driving power supply. The driving power supply can be arranged in the lamp body, and can be designed in a separated mode with the lamp. The lamp solves the problem that the lamp cannot be regulated and controlled when the input signal lines of the 0-10V lamp or the guide rail are reversely connected, so that the lamp is simpler and more convenient to install; meanwhile, the lowest adjustable brightness of the lamp can be set; specifically, the working principle of the lamp is as follows: the first is reverse connection prevention, a 0-10V dimming signal which does not distinguish positive and negative is input into the rectifying circuit 1, the dimming signal is rectified by the rectifying bridge BD1, and a high periodic voltage peak is generated at the output end of the rectifying bridge and filtered by the first resistor R1 and the fourth capacitor C4. Through the peak value of the voltage peak after the actual measurement bridge, the first resistor R1 can be changed into a resistor with 2 or more than K omega levels in parallel connection, so that the power of the resistor is reduced. And then the current is limited by the second resistor R2, so that the current flowing into the first signal end U1_ DIMI is limited, and the dimming chip U1 is prevented from being burnt out. Meanwhile, a voltage stabilizing tube of 10V can be adopted for stabilizing voltage, and a first capacitor is connected in parallel for filtering high-frequency noise waves. And secondly, the lowest brightness is adjusted, and the current of 0-10V signals can be controlled by setting the resistance values of the first resistor R1 and the second resistor R2, so that the lowest adjustable brightness of the lamp can be changed. The 0-10V dimming chip U1 receives a 0-10V signal from the dimmer through a first signal end U1_ DIMI, converts the 0-10V signal into a PWM signal, outputs the PWM signal from an enable output end U1_ PWM, and outputs the PWM signal to the constant current chip U2 after being inverted through a triode. The constant current driving circuit 4 where the constant current chip U2 is located outputs a constant current to enable the light emitting diode to work; the constant current chip U2 receives a signal of an enable input end U2_ PWM, and dimming is achieved by adjusting output current. According to the lamp, the rectifying circuit 1, the filter circuit 3 and the current limiting circuit 2 are arranged to form the reverse connection preventing circuit of the 0-10V signal end, when an input signal line is reversely connected, the lamp can still be normally regulated and controlled, and the trouble of installing and wiring the lamp is reduced. Meanwhile, in the dimming effect, the dimming depth can be changed by setting the lowest adjustable current, the lamp can be prevented from being turned off when the dimming signal voltage is low, or the problem of lamp flickering when the brightness is low is avoided, and the user experience is improved.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An anti-reverse connection circuit is characterized by at least comprising a rectifying circuit, a filter circuit and a current limiting circuit;
the input end of the rectifying circuit is connected with the input signal line in a forward direction or a reverse direction, the output end of the rectifying circuit is respectively connected with the filter circuit and the current limiting circuit, and the rectifying circuit outputs signals to the post-stage circuit through the current limiting circuit.
2. The reverse connection prevention circuit according to claim 1, wherein the rectification circuit comprises a rectification bridge, the rectification bridge is provided with a first input end, a second input end, a first output end and a second output end, the first input end and the second input end are connected with a signal line, the first output end is respectively connected with the filter circuit and the current limiting circuit, and the second output end is grounded.
3. The reverse connection preventing circuit according to claim 2, wherein the filter circuit comprises at least a first resistor and a fourth capacitor, the first resistor and the fourth capacitor are connected to the first input end, and the other ends of the first resistor and the fourth capacitor are grounded.
4. The reverse connection preventing circuit according to claim 2, wherein the current limiting circuit comprises at least a second resistor, one end of the second resistor is connected with the first input end, and the other end of the second resistor is connected with a rear-stage circuit.
5. An anti-reverse connection circuit according to claim 2, further comprising a protection circuit, wherein the protection circuit at least comprises a first capacitor and a voltage regulator tube, one end of the first capacitor and the voltage regulator tube is connected with the output end of the current limiting circuit, and the other end of the first capacitor and the voltage regulator tube is grounded.
6. A driving power supply is characterized by at least comprising a dimming driving circuit, a constant current driving circuit and an anti-reverse connection circuit according to any one of claims 1 to 5, wherein the output end of the anti-reverse connection circuit is connected with the dimming driving circuit; the dimming driving circuit is connected with the constant current driving circuit and drives the light emitting diode through the constant current driving circuit.
7. The driving power supply according to claim 6, wherein the dimming driving circuit comprises at least a dimming chip,
the dimming chip is provided with a first power supply end, a first signal end and an enable output end, the first power supply end is connected with an input power supply, the first signal end is connected with the output end of the reverse-connection preventing circuit, and the enable output end is connected with the constant-current driving circuit.
8. The driving power supply according to claim 6, wherein the dimming driving circuit further comprises an enable conduction circuit, the enable conduction circuit comprises at least a transistor, a third resistor and a fourth resistor, a base of the transistor is connected to the enable output terminal through the third resistor, a collector of the transistor is connected to the input power supply through the fourth resistor, and an emitter of the transistor is grounded; and the collector of the triode is also connected with the constant current driving circuit and outputs an enable signal.
9. The driving power supply according to claim 8, wherein the constant current driving circuit comprises a constant current chip, a constant current output circuit;
the constant current chip is provided with a second power supply end, an enabling input end, a driving end and a detection end, the second power supply end is respectively connected with a fifth capacitor and an input power supply, and the enabling input end is connected with a collector electrode of the triode; the driving end and the detection end are both connected with one end of a light-emitting diode, and the other end of the light-emitting diode is connected with an input power supply;
the constant current output circuit at least comprises a first diode, a first inductor, a sixth capacitor and a sixth resistor, wherein the first diode and the first inductor are connected with the driving end, the other end of the first inductor is respectively connected with the sixth capacitor and the sixth resistor, the other end of the sixth resistor is connected with the light emitting diode, and the other ends of the first diode and the sixth capacitor are connected with the input power supply.
10. A luminaire comprising the driving power supply according to any one of claims 6 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220787600.7U CN218217754U (en) | 2022-04-06 | 2022-04-06 | Anti-reverse connection circuit, driving power supply and lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220787600.7U CN218217754U (en) | 2022-04-06 | 2022-04-06 | Anti-reverse connection circuit, driving power supply and lamp |
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| CN218217754U true CN218217754U (en) | 2023-01-03 |
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| CN202220787600.7U Active CN218217754U (en) | 2022-04-06 | 2022-04-06 | Anti-reverse connection circuit, driving power supply and lamp |
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