CN220830545U - LED color temperature controller with 0-10V isolation - Google Patents
LED color temperature controller with 0-10V isolation Download PDFInfo
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- CN220830545U CN220830545U CN202322481087.6U CN202322481087U CN220830545U CN 220830545 U CN220830545 U CN 220830545U CN 202322481087 U CN202322481087 U CN 202322481087U CN 220830545 U CN220830545 U CN 220830545U
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- 239000003990 capacitor Substances 0.000 claims abstract description 46
- 230000000295 complement effect Effects 0.000 claims description 11
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- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 description 12
- 238000005286 illumination Methods 0.000 description 5
- 230000002277 temperature effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The utility model discloses an LED color temperature controller with 0-10V isolation, which comprises a DC-DC isolation converter, a signal acquisition unit, a modulation chip and a switch control module; the DC-DC isolation converter is used for providing isolation voltage for the signal acquisition chip; the signal acquisition unit comprises a dimming unit, a color temperature selection unit, a pulling switch, a signal acquisition chip and an isolation capacitor group, wherein the input end of the dimming unit is used for being electrically connected with an external 0-10V dimmer, the isolation capacitor group is used for forming an electrical isolation function between the signal acquisition chip and the modulation chip, and pulse signals output by the signal acquisition chip can be transmitted to the signal input end of the modulation chip through the isolation capacitor group. The utility model not only can realize stepless adjustment of the color temperature of the LED lamp, but also has the advantages of wide adjustment range, convenient adjustment and the like, meets the lighting requirements of users in various use scenes, and simultaneously meets the standard requirements that 0-10V interfaces in the LED lamp need to be isolated independently.
Description
Technical Field
The utility model relates to the field of LED control, in particular to an LED color temperature controller with 0-10V isolation.
Background
The LED is used as a novel light source, has the characteristics of energy conservation, environmental protection and high efficiency, is widely applied to various illumination fields at present, and along with the improvement of lighting quality requirements of people, intelligent illumination is a very important part in intelligent home, and compared with a traditional energy-saving lamp and an incandescent lamp, the LED illumination has high plasticity, and the brightness adjustment and the color temperature adjustment of the LED lamp become main stream requirements of intelligent illumination due to the large popularization of the LED illumination. The existing LED lamp can realize different lighting effects through brightness adjustment and color temperature adjustment, but the existing LED lamp is inconvenient in lacking color temperature adjustment or adjustment mode, can only realize adjustment of fixed color temperature, and is difficult to meet lighting requirements under different use scenes.
Disclosure of utility model
The utility model aims to provide an LED color temperature controller with 0-10V isolation, which solves one or more technical problems in the prior art.
To achieve the purpose, the utility model adopts the following technical scheme:
An LED color temperature controller with 0-10V isolation comprises a DC-DC isolation converter, a signal acquisition unit, a modulation unit and a switch control module; the DC-DC isolation converter is used for providing isolation voltage for the signal acquisition chip, and the output end of the switch control module is connected with the cathodes of the two groups of LED lamp strings;
The modulating unit comprises a modulating chip, the signal collecting unit comprises a dimming unit, a color temperature selecting unit, a pulling switch, a signal collecting chip and an isolation capacitor group, the input end of the dimming unit is electrically connected with an external 0-10V dimmer, the signal collecting chip is used for converting collected level signals into pulse signals, the output end of the dimming unit, the color temperature selecting unit and the signal collecting chip are respectively connected with the pulling switch, the collecting object of the signal collecting chip is changed by selecting the gear of the pulling switch, the isolation capacitor group is used for forming an electrical isolation effect between the signal collecting chip and the modulating chip, and the pulse signals output by the signal collecting chip can be transmitted to the signal input end of the modulating chip through the isolation capacitor group;
The modulation chip is used for modulating the pulse signals coupled by the isolation capacitor group into a pair of complementary PWM signals and outputting the complementary PWM signals to the switch control module, and the switch control module is used for respectively controlling the on-off time of the two groups of LED lamp strings.
Preferably, the DC-DC isolation converter comprises a switch chip and a transformer, wherein a first pin of the switch chip is connected with one end of a primary side of the transformer, a fifth pin and a sixth pin of the switch chip are connected with the other end of the primary side of the transformer, and a secondary side of the transformer is connected with a fourth pin of the signal acquisition chip.
Preferably, the color temperature selecting unit comprises a plurality of adjustable potentiometers, the pulling switch is provided with a plurality of connecting ends and a public end, the dimming unit is connected with one connecting end of the pulling switch, one ends of the adjustable potentiometers are in butt joint connection, the other ends of the adjustable potentiometers are respectively connected with the other connecting ends of the pulling switch, and the public end of the pulling switch is connected with the signal acquisition chip.
Preferably, the dimming unit comprises a first TVS diode, an anode connecting wire and a cathode connecting wire, wherein the cathode of the first TVS diode is connected with one of the connecting ends of the pullout switch and the anode connecting wire, the anode of the first TVS diode is connected with the cathode connecting wire, and the anode connecting wire and the cathode connecting wire are respectively used for being connected with the anode and the cathode of the external dimmer.
Preferably, the isolation capacitor group comprises a first isolation capacitor and a second isolation capacitor, two ends of the first isolation capacitor are respectively connected with a sixth pin of the signal acquisition chip and a first pin of the modulation chip, and two ends of the second isolation capacitor are respectively connected with a seventh pin of the signal acquisition chip and a second pin of the modulation chip.
Preferably, the switch control module comprises a first MOS tube, a second MOS tube, a first grid pull-down resistor, a second resistor, a third resistor, a second TVS diode and a third TVS diode, wherein the source electrode of the first MOS tube is respectively connected with the cathode of one group of LED lamp strings and the cathode of the second TVS diode, the grid electrode of the first MOS tube is respectively connected with one end of the second resistor and one end of the first grid pull-down resistor, the other end of the first grid pull-down resistor is connected with the drain electrode of the first MOS tube, and the other end of the second resistor is connected with the seventh pin of the control chip; the source electrode of the second MOS tube is respectively connected with the cathode of the other group of LED lamp strings and the cathode of the third TVS diode, the grid electrode of the second MOS tube is respectively connected with one end of the third resistor and one end of the second grid electrode pull-down resistor, the other end of the second grid electrode pull-down resistor is connected with the drain electrode of the second MOS tube, the other end of the third resistor is connected with the sixth pin of the control chip, and the anodes of the second TVS diode and the anodes of the third TVS diode are connected with the anodes of the two groups of LED lamp strings.
Preferably, the device further comprises a linear voltage stabilizing circuit, wherein the linear voltage stabilizing circuit comprises a filter diode and a voltage stabilizing chip, the anode of the filter diode is connected with the power input end, the cathode of the filter diode is connected with a first pin of the voltage stabilizing chip, and a third pin of the voltage stabilizing chip is connected with an eighth pin of the modulation chip.
Preferably, the two groups of LED lamp strings are respectively a cold white LED lamp string and a warm white LED lamp string.
Compared with the prior art, the utility model has the beneficial effects that: providing isolation voltage for the signal acquisition chip by arranging a DC-DC isolation converter, so as to ensure stable power supply for the signal acquisition chip; by arranging the signal acquisition unit and the switch control module, a user can access the dimming unit by adopting an external dimmer, so that the dimming unit or the color temperature selection unit can be utilized to steplessly adjust the color temperature of the two groups of LED lamp strings according to actual use requirements; during adjustment, the acquisition object of the signal acquisition chip is changed by selecting the gear of the pulling switch, so that the level signal acquired by the signal acquisition chip is changed, the signal acquisition chip converts the acquired level signal into a pulse signal, and the pulse signal is transmitted to the signal input end of the modulation chip through the isolation capacitor bank; the modulation chip receives the pulse signals coupled by the isolation capacitor group to form a pair of complementary PWM signals and outputs the complementary PWM signals to the switch control module, so that the light mixing adjustment of two groups of LED lamp strings with different color temperatures is realized, and the LED lamp strings represent corresponding color temperatures; through setting up isolation capacitor group for form electric isolation between signal acquisition chip and the modulation chip, the pulse signal of signal acquisition chip output can pass through isolation capacitor group and transmit in the modulation chip simultaneously.
Therefore, the utility model not only can realize stepless adjustment of the color temperature of the LED lamp, but also has the advantages of wide adjustment range, convenient adjustment and the like, meets the lighting requirements of users in various use scenes, and simultaneously meets the standard requirements that 0-10V interfaces in the LED lamp are required to be isolated independently.
Drawings
The present utility model is further illustrated by the accompanying drawings, which are not to be construed as limiting the utility model in any way.
FIG. 1 is a schematic overall construction of one embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of one embodiment of the present utility model.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
An LED color temperature controller with 0-10V isolation of the present embodiment, referring to fig. 1 and 2, includes a DC-DC isolation converter, a signal acquisition unit, a modulation unit, and a switch control module; the DC-DC isolation converter, the modulation unit and the two groups of LED lamp strings are connected with the power input end V < + >, the DC-DC isolation converter is used for providing isolation voltage for the signal acquisition chip, and the output end of the switch control module is connected with the cathodes of the two groups of LED lamp strings;
The modulating unit comprises a modulating chip, the signal collecting unit comprises a dimming unit, a color temperature selecting unit, a pulling switch DP1, a signal collecting chip U3 and an isolation capacitor group, the input end of the dimming unit is electrically connected with an external 0-10V dimmer, the signal collecting chip U3 is used for converting collected level signals into pulse signals, the output end of the dimming unit, the color temperature selecting unit and the signal collecting chip U3 are respectively connected with the pulling switch DP1, the collecting object of the signal collecting chip U3 is changed by selecting the gear of the pulling switch DP1, the isolation capacitor group is used for forming an electrical isolation function between the signal collecting chip U3 and the modulating chip U4, and the pulse signals output by the signal collecting chip can be transmitted to the signal input end of the modulating chip U4 through the isolation capacitor group;
The modulation chip U4 is used for modulating pulse signals coupled by the isolation capacitor group into a pair of complementary PWM signals and outputting the complementary PWM signals to the switch control module, and the switch control module is used for respectively controlling the on-off time of the two groups of LED lamp strings.
Providing isolation voltage for the signal acquisition chip by arranging a DC-DC isolation converter, so as to ensure stable power supply for the signal acquisition chip; by arranging the signal acquisition unit and the switch control module, a user can access the dimming unit by adopting an external dimmer, so that the dimming unit or the color temperature selection unit can be utilized to steplessly adjust the color temperature of the two groups of LED lamp strings according to actual use requirements; during adjustment, the acquisition object of the signal acquisition chip U3 is changed by selecting the gear of the pulling switch DP1, so that the level signal acquired by the signal acquisition chip U3 is changed, the signal acquisition chip U3 converts the acquired level signal into a pulse signal, and the pulse signal is transmitted to the signal input end of the modulation chip U4 through the isolation capacitor bank; the modulation chip U4 receives the pulse signals coupled by the isolation capacitor group to form a pair of complementary PWM signals and outputs the complementary PWM signals to the switch control module, so that light mixing adjustment is carried out on two groups of LED lamp strings with different color temperatures, and the LED lamp strings represent corresponding color temperatures; through setting up isolation capacitor group for form electric isolation between signal acquisition chip U3 and the modulation chip U4, the pulse signal of signal acquisition chip U3 output can pass through isolation capacitor group and transmit in the modulation chip U4 simultaneously.
Therefore, the embodiment not only can realize stepless adjustment of the color temperature of the LED lamp, but also has the advantages of wide adjustment range, convenient adjustment and the like, meets the lighting requirements of users in various use scenes, and simultaneously meets the standard requirement that 0-10V interfaces in the LED lamp need to be isolated independently.
Preferably, the DC-DC isolation converter comprises a switch chip U1 and a transformer T1-1, wherein a first pin of the switch chip U1 is connected with one end of the primary side of the transformer T1, a fifth pin and a sixth pin of the switch chip U1 are connected with the other end of the primary side of the transformer T1, and a secondary side of the transformer T1 is connected with a fourth pin of the signal acquisition chip U3. Therefore, the voltage provided by the power input end V+ is converted into the working voltage of the signal acquisition chip U3 through the switch chip U1 and the transformer T1-1, and the isolation between the signal acquisition chip U3 and the power input end V+ is realized.
Preferably, the signal acquisition unit still includes four adjustable potentiometre VR1, VR2, VR3, VR4, and the pull switch DP1 has five link and a public end, and the dimming unit links to each other with one of them link of pull switch DP1, and four adjustable potentiometre VR1, VR2, VR3, VR 4's one end butt joint links to each other, and four adjustable potentiometre VR1, VR2, VR3, VR 4's the other end links to each other with the other four link of pull switch respectively, and the public end of pull switch DP1 links to each other with signal acquisition chip U3. Through pulling switch DP1 respectively with four adjustable potentiometre VR1, VR2, VR3, VR4 and external light modulator link to each other, accessible pulling switch DP1 selects different gears during the use, makes the LED lamp cluster wholly form different colour temperature effects. The user can set a common color temperature effect on the four adjustable potentiometers VR1, VR2, VR3 and VR4, and can directly switch to the corresponding adjustable potentiometers VR1, VR2, VR3 and VR4 through the pulling switch DP1 when in use, and the adjustable potentiometers are connected with the signal acquisition chip U3, so that the adjustable potentiometer is convenient to adjust; the LED lamp string can be switched to the signal acquisition chip U3 and the dimming unit by pulling the switch DP1, so that the LED lamp string can show a corresponding color temperature effect by adjusting an external dimmer. Therefore, the color temperature controller of the embodiment has the advantages of wide adjusting range, convenient adjusting mode and the like.
Preferably, the dimming unit comprises a resistor R9, a first TVS diode D6, a capacitor C11, a positive connection wire D+ and a negative connection wire D-, wherein one end of the resistor R9 is connected with one connection end of the toggle switch and the cathode of the first TVS diode D6 respectively, the other end of the resistor R9 is connected with one end of the capacitor C11 and the positive connection wire D+ respectively, the other end of the capacitor C11 is connected with the anode of the first TVS diode D6 and the negative connection wire D-, and the positive connection wire D+ and the negative connection wire D-are used for being connected with the anode and the cathode of the external dimmer respectively. Therefore, the first TVS diode D9 plays a role in preventing static electricity and surge, and the dimming unit is connected with the positive electrode and the negative electrode of the external dimmer through the positive electrode connecting wire D+ and the negative electrode connecting wire D-.
Preferably, the isolation capacitor set includes a first isolation capacitor C7 and a second isolation capacitor C8, where two ends of the first isolation capacitor C7 are connected to a sixth pin of the signal acquisition chip U3 and a first pin of the modulation chip U4, and two ends of the second isolation capacitor C8 are connected to a seventh pin of the signal acquisition chip U3 and a second pin of the modulation chip U4, respectively. The first isolation capacitor C7 and the second isolation capacitor C8 are respectively connected with the modulation chip U4 and the signal acquisition chip U3, so that the first isolation capacitor C7 and the second isolation capacitor C8 serve as safety capacitors, and the electric isolation function is achieved, and pulse signals can be transmitted between the signal acquisition chip U3 and the modulation chip U4.
Preferably, the switch control module includes a first MOS transistor Q1, a second MOS transistor Q2, a first gate pull-down resistor Rsg, a second gate pull-down resistor Rsg, a resistor R7, a resistor R8, a second TVS diode D4, and a third TVS diode D5, where the source of the first MOS transistor Q1 is connected to the negative pole WW-of one group of LED strings and the cathode of the second TVS diode D4, the gate of the first MOS transistor Q1 is connected to one end of the resistor R7 and one end of the first gate pull-down resistor Rsg1, the other end of the first gate pull-down resistor Rsg is connected to the drain of the first MOS transistor Q1, and the other end of the resistor R7 is connected to the seventh pin of the control chip; the source electrode of the second MOS tube Q2 is respectively connected with the cathode end CW-of the other group of LED lamp strings and the cathode of the third TVS diode D5, the grid electrode of the second MOS tube Q2 is respectively connected with one end of a resistor R8 and one end of a second grid electrode pull-down resistor Rsg, the other end of the second grid electrode pull-down resistor Rsg2 is connected with the drain electrode of the second MOS tube Q2, the other end of the resistor R8 is connected with the sixth pin of the control chip, and the anodes of the second TVS diode D4 and the third TVS diode D5 are respectively connected with the anode ends LED+ of the two groups of LED lamp strings.
The switching time of the first MOS tube Q1 is controlled through the duty ratio output by the seventh pin of the modulation chip U4, so that the adjustment of the lighting time of the cold white LED lamp string is realized; the switching time of the second MOS tube Q2 is controlled through the duty ratio output by the sixth pin of the modulation chip U4, so that the lighting time of the warm white LED lamp string is adjusted, and therefore, the pulse signals converted after being acquired by the signal acquisition chip U3 are modulated through the modulation chip U4 to output a pair of complementary PWM signals to carry out mixed light adjustment on two groups of LED lamp strings with different color temperatures, and the LED lamp strings represent corresponding color temperatures.
Preferably, the device further comprises a linear voltage stabilizing circuit, wherein the linear voltage stabilizing circuit comprises a filter diode D1 and a voltage stabilizing chip U1, the anode of the filter diode D1 is connected with the power input end V+, the cathode of the filter diode D1 is connected with the first pin of the voltage stabilizing chip U1, and the third pin of the voltage stabilizing chip U1 is connected with the eighth pin of the modulation chip D4. The voltage stabilizing chip U1 plays a role in stabilizing the power supply of the modulation chip D4.
Preferably, the two groups of LED lamp strings are respectively a cold white LED lamp string and a warm white LED lamp string. Therefore, the on-off time of the cold white LED lamp strings and the warm white LED lamp strings with different color temperatures is controlled, so that the two groups of LED lamp strings integrally show different color temperatures, the light environment with multiple color temperatures can be configured in different scenes, and more lighting requirements are met.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (8)
1. The LED color temperature controller with 0-10V isolation is characterized by comprising a DC-DC isolation converter, a signal acquisition unit, a modulation unit and a switch control module; the DC-DC isolation converter is used for providing isolation voltage for the signal acquisition chip, and the output end of the switch control module is connected with the cathodes of the two groups of LED lamp strings;
The modulating unit comprises a modulating chip, the signal collecting unit comprises a dimming unit, a color temperature selecting unit, a pulling switch, a signal collecting chip and an isolation capacitor group, the input end of the dimming unit is electrically connected with an external 0-10V dimmer, the signal collecting chip is used for converting collected level signals into pulse signals, the output end of the dimming unit, the color temperature selecting unit and the signal collecting chip are respectively connected with the pulling switch, the collecting object of the signal collecting chip is changed by selecting the gear of the pulling switch, the isolation capacitor group is used for forming an electrical isolation effect between the signal collecting chip and the modulating chip, and the pulse signals output by the signal collecting chip can be transmitted to the signal input end of the modulating chip through the isolation capacitor group;
The modulation chip is used for modulating the pulse signals coupled by the isolation capacitor group into a pair of complementary PWM signals and outputting the complementary PWM signals to the switch control module, and the switch control module is used for respectively controlling the on-off time of the two groups of LED lamp strings.
2. The LED color temperature controller with 0-10V isolation of claim 1, wherein the DC-DC isolation converter comprises a switching chip and a transformer, a first pin of the switching chip is connected to one end of the primary side of the transformer, a fifth pin and a sixth pin of the switching chip are connected to the other end of the primary side of the transformer, and a secondary side of the transformer is connected to a fourth pin of the signal acquisition chip.
3. The LED color temperature controller with 0-10V isolation of claim 1, wherein the color temperature selecting unit comprises a plurality of adjustable potentiometers, the pull switch has a plurality of connection terminals and a common terminal, the dimming unit is connected to one of the connection terminals of the pull switch, one ends of the plurality of adjustable potentiometers are connected in a butt joint manner, the other ends of the plurality of adjustable potentiometers are respectively connected to the other connection terminals of the pull switch, and the common terminal of the pull switch is connected to the signal acquisition chip.
4. The LED color temperature controller with 0-10V isolation of claim 1, wherein the dimming unit comprises a first TVS diode, a positive connection line and a negative connection line, the cathode of the first TVS diode is connected to one of the connection terminals of the pullout switch and the positive connection line, the anode of the first TVS diode is connected to the positive connection line, and the positive connection line and the negative connection line are respectively connected to the positive and negative electrodes of the external dimmer.
5. The LED color temperature controller with 0-10V isolation of claim 1, wherein the isolation capacitor set comprises a first isolation capacitor and a second isolation capacitor, wherein two ends of the first isolation capacitor are respectively connected with a sixth pin of the signal acquisition chip and a first pin of the modulation chip, and two ends of the second isolation capacitor are respectively connected with a seventh pin of the signal acquisition chip and a second pin of the modulation chip.
6. The LED color temperature controller with 0-10V isolation of claim 1, wherein the switch control module comprises a first MOS transistor, a second MOS transistor, a first gate pull-down resistor, a second resistor, a third resistor, a second TVS diode, and a third TVS diode, the source of the first MOS transistor is connected to the cathode of one group of LED strings and the cathode of the second TVS diode, the gate of the first MOS transistor is connected to one end of the second resistor and one end of the first gate pull-down resistor, the other end of the first gate pull-down resistor is connected to the drain of the first MOS transistor, and the other end of the second resistor is connected to the seventh pin of the control chip; the source electrode of the second MOS tube is respectively connected with the cathode of the other group of LED lamp strings and the cathode of the third TVS diode, the grid electrode of the second MOS tube is respectively connected with one end of the third resistor and one end of the second grid electrode pull-down resistor, the other end of the second grid electrode pull-down resistor is connected with the drain electrode of the second MOS tube, the other end of the third resistor is connected with the sixth pin of the control chip, and the anodes of the second TVS diode and the anodes of the third TVS diode are connected with the anodes of the two groups of LED lamp strings.
7. The LED color temperature controller with 0-10V isolation of claim 1, further comprising a linear voltage regulator circuit comprising a filter diode and a voltage regulator chip, the anode of the filter diode connected to the power input, the cathode of the filter diode connected to the first pin of the voltage regulator chip, and the third pin of the voltage regulator chip connected to the eighth pin of the modulation chip.
8. The LED color temperature controller with 0-10V isolation of claim 1, wherein the two sets of LED strings are cool white LED strings and warm white LED strings, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322481087.6U CN220830545U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller with 0-10V isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322481087.6U CN220830545U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller with 0-10V isolation |
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| Publication Number | Publication Date |
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| CN220830545U true CN220830545U (en) | 2024-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322481087.6U Active CN220830545U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller with 0-10V isolation |
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| CN (1) | CN220830545U (en) |
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2023
- 2023-09-13 CN CN202322481087.6U patent/CN220830545U/en active Active
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