CN115278977B - Three-in-one dimming power supply cascade control circuit with external adjustable resistor - Google Patents
Three-in-one dimming power supply cascade control circuit with external adjustable resistor Download PDFInfo
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- CN115278977B CN115278977B CN202211201729.6A CN202211201729A CN115278977B CN 115278977 B CN115278977 B CN 115278977B CN 202211201729 A CN202211201729 A CN 202211201729A CN 115278977 B CN115278977 B CN 115278977B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The three-in-one dimming power supply cascade control circuit with the external adjustable resistor comprises a plurality of power supply INPUT ends, a power supply OUTPUT end, a dimming component M1 and an adjustable resistor VR1, wherein the adjusting end of the adjustable resistor VR1 is connected with the dimming component M1; the dimming communication port of the dimming component M1 is respectively connected with the power supply INPUT and the power supply OUTPUT; a master-slave machine judging port of the dimming component M1 is connected with a power supply INPUT, and a power supply OUTPUT is grounded; the PWM end of the dimming component M1 is respectively connected with a power supply INPUT and a power supply OUTPUT; the voltage end of the dimming component M1 is respectively connected with the power supply INPUT and the power supply OUTPUT; the earthing terminal of the dimming component M1 is respectively connected with the pin 2 of the power supply INPUT and the pin 2 of the power supply OUTPUT, so that the dimming convenience and reliability of power supply cascade are improved, and the phenomenon that dimming confusion changes and LED flickers due to the fact that a plurality of cascade power supply VR1 adjustable resistors are simultaneously dimmed can be avoided.
Description
Technical Field
The invention relates to the field of plant lamp power supplies, in particular to a three-in-one dimming power supply cascade control circuit with an external adjustable resistor.
Background
The LED lighting has the advantages of energy conservation, environmental protection and long service life, wherein the LED plant lamp is widely applied, the plant lamp is widely distributed, the total power of the power supply of the plant lamp is large, tens to hundreds of power supplies with adjustable external resistors are needed to be cascaded, and each power supply with adjustable external resistors can independently control dimming, so that when the cascade is forgotten to manually adjust the adjustable resistor of the other power supply to a non-VR 1 dimming position (when the AD input voltage of the 1 st pin of the dimming component is more than 4.5V and is a non-VR 1 dimming position, the dimming component is only controlled by the external PWM of the 5 th pin, 0-10V and three-in-one dimming input of the resistors), the simultaneous dimming of a plurality of power supplies can occur, and the phenomenon of LED flicker can occur due to the disordered dimming change, therefore, a lot of time is needed for checking, and the triode Q1 for dimming is not provided with a current-limiting protection circuit, so that under the condition that the Q1 is externally connected with a 1-10V dimming input with large current when the Q1 is switched on for dimming, the Q1 triode is easy to generate excessive heat and burn out and lose efficacy.
Referring to fig. 1, fig. 1 is an industry conventional circuit, after a 1 st power supply is cascaded to an nth power supply, since a VR1 adjustable resistor of each power supply can change a 1 st pin AD input voltage of a dimming component, thereby changing a 2 nd pin PWM output duty ratio of the dimming component, and further controlling a 5 th pin dimming three-in-one PWM input duty ratio of the dimming component of the cascaded power supply (a 10V 0.1ma constant current source is built in this pin), a dimming purpose is achieved, only the VR1 adjustable resistor of one power supply can be kept to dim during use, VR1 adjustable resistors of other power supplies need to be manually adjusted to a non-VR 1 dimming position (when the AD input voltage of the 1 st pin of the dimming component is greater than 4.5V, the dimming component is not controlled by a 0-10V, and a resistance dimming input control), otherwise, VR1 adjustable resistors of multiple power supplies simultaneously control dimming, which may cause a chaotic dimming change to an LED, and may cause a wrong dimming, and may take time, and a triode Q1 is not protected by a current limiting protection circuit, when Q1 is simultaneously turned on, and a large current limiting switch may be turned on, and a large current limiting PWM switch may be easily destroyed.
Disclosure of Invention
In order to solve the above problems, the present technical solution provides a three-in-one dimming power supply cascade control circuit with an external adjustable resistor.
In order to achieve the purpose, the technical scheme is as follows:
the three-in-one dimming power supply cascade control circuit with the external adjustable resistor comprises a plurality of cascade-connected power supply INPUT ends and power supply OUTPUT ends, and further comprises dimming components M1 corresponding to the power supply INPUT ends and the power supply OUTPUT ends;
the dimming circuit also comprises an adjustable resistor VR1, wherein the adjusting end of the adjustable resistor VR1 is connected with the dimming component M1, and the other two ends are respectively connected with voltage and ground;
the dimming communication port of the dimming component M1 is connected to the pin 5 of the power INPUT and the pin 5 of the power OUTPUT respectively;
a master-slave machine judging port of the dimming component M1 is connected with a pin 3 of the power supply INPUT, the pin 3 of the power supply OUTPUT is grounded, and the master-slave machine judging port is also connected with a pull-up resistor;
the PWM end of the dimming component M1 is respectively connected with a pin 4 of the power supply INPUT and a pin 4 of the power supply OUTPUT;
the voltage end of the dimming component M1 is respectively connected with the pins 1 and 6 of the power supply INPUT and the pins 1 and 6 of the power supply OUTPUT;
the ground terminal of the dimming component M1 is connected to the pin 2 of the power INPUT and the pin 2 of the power OUTPUT, respectively.
In some embodiments, the voltage applied to the adjustable resistor VR1 is +5V.
In some embodiments, when the adjustable resistor VR1 of the 1 st power supply adjusts the AD input voltage of the 1 st pin of the dimming component M1 to increase and change from 0 to 4V, the dimming change of 0% to 100% is directly controlled inside the 1 st dimming component M1 of the power supply, and the corresponding dimming state is sent to the receiving end of the dimming communication port of the 7 th pin of the dimming component M1 of the cascade power supply through the dimming communication port of the 7 th pin of the dimming component M1, so as to control the dimming of the cascade power supply from 0% to 100%.
In some embodiments, the voltage connected to the voltage terminal of the dimming component M1 is +12V.
The beneficial effect of this application does:
the application improves the convenience and the reliability of the cascaded dimming of the power supply, the phenomenon that the dimming is disordered and changes to the LED flicker caused by the fact that a plurality of cascaded power supply VR1 adjustable resistors simultaneously dim light can not occur, and the phenomenon that elements are burnt out under the condition of 1-10V dimming input with large current when the VR1 adjustable resistors dim light can not occur.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic diagram of a prior art configuration;
fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, the three-in-one dimming power supply cascade control circuit with an external adjustable resistor includes a plurality of cascade-connected power supply INPUT terminals and power supply OUTPUT terminals, and further includes a dimming component M1 corresponding to the power supply INPUT terminals and the power supply OUTPUT terminals;
the dimming circuit further comprises an adjustable resistor VR1, wherein the adjusting end of the adjustable resistor VR1 is connected with the dimming component M1, and the other two ends are respectively connected with voltage and ground;
the dimming communication port of the dimming component M1 is connected to the pin 5 of the power INPUT and the pin 5 of the power OUTPUT respectively;
a master-slave machine judging port of the dimming component M1 is connected with a pin 3 of the power supply INPUT, the pin 3 of the power supply OUTPUT is grounded, and the master-slave machine judging port is also connected with a pull-up resistor;
the PWM end of the dimming component M1 is respectively connected with a pin 4 of the power supply INPUT and a pin 4 of the power supply OUTPUT;
the voltage end of the dimming component M1 is respectively connected with the pin 1 and the pin 6 of the power supply INPUT and the pin 1 and the pin 6 of the power supply OUTPUT;
the ground terminal of the dimming component M1 is connected to the pin 2 of the power INPUT and the pin 2 of the power OUTPUT, respectively.
Furthermore, the voltage connected to the adjustable resistor VR1 is +5V.
Furthermore, when the adjustable resistor VR1 of the 1 st power supply adjusts the AD input voltage of the 1 st pin of the dimming component M1 to be increased and changed from 0 to 4V, the 1 st power supply dimming component M1 directly controls dimming change from 0% to 100%, and sends the corresponding dimming state to the receiving end of the dimming communication port of the 7 th pin of the dimming component M1 of the cascade power supply through the dimming communication port of the 7 th pin of the dimming component M1, so as to control the dimming of the cascade power supply from 0% to 100%.
Further, the voltage connected to the voltage terminal of the dimming component M1 is +12V.
The principle is as follows: the 3 rd pin of the cascade port INPUT of each power supply is connected to the INPUT port of the built-in pull-up resistor of the 6 th pin of the dimming component, the 3 rd pin of the OUTPUT port is connected to GND, when the power supplies are cascaded, the 3 rd pin of the power supply INPUT port is connected with the 3 rd pin GND of the OUTPUT port of the previous stage power supply, so that the INPUT port of the built-in pull-up resistor of the 6 th pin of the dimming component of the current stage power supply is connected to GND, if the 6 th pin of the dimming component is judged to be 0V low potential from a master-slave machine, the 7 th pin dimming communication port of the dimming component is taken as a communication receiving end, the dimming state of the dimming component is consistent with the transmitted host, and is irrelevant to the AD INPUT port of the 1 st pin of the dimming component and the AD INPUT of the 5 th pin of the dimming component, if the 6 th pin of the power supplies is judged to be 5V high potential from the master-slave machine, the 7 th pin dimming component is taken as a communication transmitting end, the dimming component is taken as a host to transmit the dimming state, the 1 st pin AD INPUT port is effective, thus only the 3 rd pin of the INPUT port of the 1 st power supply is not connected to GND, thereby the INPUT port of the built-in pull-up resistor of the 6 th pin of the 1 st power supply dimming component is high potential, the 1 st power supply is a host, the 7 th pin communication port of the dimming component is used as a communication sending end to control the cascade power supply, the 1 st pin AD INPUT port of the dimming component is effective, thereby only the 1 st pin AD INPUT of the dimming component of the 1 st power supply is effective, when the 1 st pin AD INPUT voltage of the dimming component is adjusted by the VR1 adjustable resistor of the 1 st power supply and is increased and changed from 0-4V (the dimming component is not related to the 5 th pin external PWM,0-10V and resistance three-in-one dimming INPUT control), the dimming component of the 1 st power supply is directly controlled to be changed from 0-100% dimming change, and the corresponding dimming state is sent to the 7 th pin dimming communication port of the dimming component of the cascade power supply through the 7 th pin dimming communication port of the dimming component Receiving the end through the signal port so as to control the cascade power supply to adjust the light from 0% to 100%; when the AD input voltage of the 1 st pin of the first power supply dimming component is greater than the 4.5V position, the dimming state of the dimming component of the first power supply is controlled only by the external PWM of the 5 th pin, 0-10V and resistance three-in-one dimming input, and the corresponding dimming state is sent to the cascaded power supply, so that only one host controls the cascaded power supply all the time, and the VR1 adjustable resistance of the host is dimmed and the external PWM,0-10V and resistance three-in-one dimming input is only effective all the time, so that the phenomenon that the LED flickers due to the chaotic dimming change can not occur, and the phenomenon that the element is burnt out under the condition that the VR1 adjustable resistance is dimmed and the external 1-10V dimming input with large current can not occur.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.
Claims (3)
1. The three-in-one dimming power supply cascade control circuit with the external adjustable resistor is characterized by comprising a plurality of cascade-connected power supply INPUT ends and power supply OUTPUT ends and a dimming component M1 corresponding to the power supply INPUT ends and the power supply OUTPUT ends;
the dimming circuit further comprises an adjustable resistor VR1, wherein the adjusting end of the adjustable resistor VR1 is connected with the dimming component M1, and the other two ends are respectively connected with voltage and ground;
the dimming communication port of the dimming component M1 is connected to the pin 5 of the power INPUT and the pin 5 of the power OUTPUT respectively;
a master-slave machine judging port of the dimming component M1 is connected with a pin 3 of the power supply INPUT, the pin 3 of the power supply OUTPUT is grounded, and the master-slave machine judging port is also connected with a pull-up resistor;
the PWM end of the dimming component M1 is respectively connected with a pin 4 of the power supply INPUT and a pin 4 of the power supply OUTPUT;
the voltage end of the dimming component M1 is respectively connected with the pin 1 and the pin 6 of the power supply INPUT and the pin 1 and the pin 6 of the power supply OUTPUT;
the grounding end of the dimming component M1 is respectively connected with the pin 2 of the power supply INPUT and the pin 2 of the power supply OUTPUT;
when the adjustable resistor VR1 of the 1 st power supply adjusts the AD input voltage of the 1 st pin of the dimming component M1 to be increased and changed from 0-4V, the dimming change of 0-100% is directly controlled in the 1 st power supply dimming component M1, and the corresponding dimming state is sent to the receiving end of the dimming communication port of the 7 th pin of the dimming component M1 of the cascade power supply through the dimming communication port of the 7 th pin of the dimming component M1, so that the dimming of the cascade power supply is controlled from 0-100%;
if the 6 th pin master-slave machine judging port of the dimming component is at 0V low potential, the 7 th pin dimming communication port of the dimming component is used as a communication receiving end, the dimming state of the dimming component is consistent with the transmitted host machine and is irrelevant to the 1 st pin AD INPUT port of the dimming component and the 5 th pin external three-in-one dimming INPUT of the dimming component, if the power supply is at 5V high potential, the 7 th pin dimming communication port of the dimming component is used as a communication transmitting end, the dimming component is used as the host machine to transmit the dimming state, the 1 st pin AD INPUT port of the dimming component is effective, only the 3 rd pin of the INPUT port of the 1 st power supply is not connected to GND, the INPUT port of a pull-up resistor built in the 6 th pin of the 1 st power supply dimming component is at high potential, the 1 st power supply is used as the host machine, the 7 th pin communication port of the dimming component is used as the communication transmitting end to control the cascade power supply, the 1 st pin AD INPUT port of the dimming component is effective, and only the 1 st pin AD INPUT port of the dimming component of the 1 st power supply is effective.
2. The cascaded control circuit of three-in-one dimming power supply with external adjustable resistor as claimed in claim 1, wherein: the voltage of adjustable resistance VR1 access is +5V.
3. The cascaded control circuit of three-in-one dimming power supply with external adjustable resistor as claimed in claim 1, wherein: the voltage connected to the voltage end of the dimming component M1 is +12V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201729.6A CN115278977B (en) | 2022-09-29 | 2022-09-29 | Three-in-one dimming power supply cascade control circuit with external adjustable resistor |
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| CN202211201729.6A CN115278977B (en) | 2022-09-29 | 2022-09-29 | Three-in-one dimming power supply cascade control circuit with external adjustable resistor |
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| CN115278977A CN115278977A (en) | 2022-11-01 |
| CN115278977B true CN115278977B (en) | 2022-12-09 |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696961U (en) * | 2012-06-08 | 2013-01-23 | 深圳市索源科技有限公司 | Light emitting diode (LED) dimming device |
| CN103037560A (en) * | 2011-09-30 | 2013-04-10 | 海洋王照明科技股份有限公司 | Automatic dimming emergency lamp |
| CN107959991A (en) * | 2017-10-23 | 2018-04-24 | 东莞达文西光电有限公司 | A kind of dimming driving circuit |
| CN210093621U (en) * | 2019-05-31 | 2020-02-18 | 无锡安邦电气股份有限公司 | Isolated PWM multi-group lamp dimming circuit |
| CN210899726U (en) * | 2019-09-17 | 2020-06-30 | 中山市志拓照明电子科技有限公司 | Trinity control interface circuit of lamps and lanterns |
| CN211063816U (en) * | 2019-12-17 | 2020-07-21 | 深圳市正远科技有限公司 | Three-in-one light-adjusting color temperature-adjusting power supply |
| CN211457461U (en) * | 2020-01-19 | 2020-09-08 | 酷矽半导体科技(上海)有限公司 | Light emitting diode driving chip |
| CN212573034U (en) * | 2020-06-09 | 2021-02-19 | 福建省中科生物股份有限公司 | Low-cost lamp dimming and color mixing system |
| CN212752675U (en) * | 2020-07-31 | 2021-03-19 | 卫星电子（中山）有限公司 | Two-wire type dimming and color mixing control system for fan lamp |
| CN215345140U (en) * | 2021-07-08 | 2021-12-28 | 杭州亿美光电科技有限公司 | Novel embedded intelligent control's mixing of colors down lamp of adjusting luminance |
| CN114126142A (en) * | 2021-11-05 | 2022-03-01 | 深圳市瑞晶实业有限公司 | Trinity dimmer circuit of output current precision is adjusted in area |
| CN114222402A (en) * | 2021-12-06 | 2022-03-22 | 深圳市星之佑科技有限公司 | Trinity dimmer circuit |
| CN216217644U (en) * | 2021-10-22 | 2022-04-05 | 佛山市顺德区常铭光电科技有限公司 | LED lamp bank control circuit |
| CN114340078A (en) * | 2021-11-24 | 2022-04-12 | 中山市爱日照明科技有限公司 | Dimming circuit with adjustable current |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8344659B2 (en) * | 2009-11-06 | 2013-01-01 | Neofocal Systems, Inc. | System and method for lighting power and control system |
| DE102014218687A1 (en) * | 2014-09-17 | 2016-03-17 | Osram Gmbh | Circuit arrangement for operating at least a first and a second cascade of LEDs |
| CN109526093A (en) * | 2018-03-26 | 2019-03-26 | 漳州立达信灯具有限公司 | LED light tube drive circuit and LED illumination device |
| CN110582136A (en) * | 2018-06-08 | 2019-12-17 | 美芯晟科技（北京）有限公司 | Dimmable LED drive circuit and control method |
| CN213694238U (en) * | 2020-12-04 | 2021-07-13 | 赛万特科技有限责任公司 | Driving circuit for LED lamp and LED lamp comprising same |
-
2022
- 2022-09-29 CN CN202211201729.6A patent/CN115278977B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037560A (en) * | 2011-09-30 | 2013-04-10 | 海洋王照明科技股份有限公司 | Automatic dimming emergency lamp |
| CN202696961U (en) * | 2012-06-08 | 2013-01-23 | 深圳市索源科技有限公司 | Light emitting diode (LED) dimming device |
| CN107959991A (en) * | 2017-10-23 | 2018-04-24 | 东莞达文西光电有限公司 | A kind of dimming driving circuit |
| CN210093621U (en) * | 2019-05-31 | 2020-02-18 | 无锡安邦电气股份有限公司 | Isolated PWM multi-group lamp dimming circuit |
| CN210899726U (en) * | 2019-09-17 | 2020-06-30 | 中山市志拓照明电子科技有限公司 | Trinity control interface circuit of lamps and lanterns |
| CN211063816U (en) * | 2019-12-17 | 2020-07-21 | 深圳市正远科技有限公司 | Three-in-one light-adjusting color temperature-adjusting power supply |
| CN211457461U (en) * | 2020-01-19 | 2020-09-08 | 酷矽半导体科技(上海)有限公司 | Light emitting diode driving chip |
| CN212573034U (en) * | 2020-06-09 | 2021-02-19 | 福建省中科生物股份有限公司 | Low-cost lamp dimming and color mixing system |
| CN212752675U (en) * | 2020-07-31 | 2021-03-19 | 卫星电子（中山）有限公司 | Two-wire type dimming and color mixing control system for fan lamp |
| CN215345140U (en) * | 2021-07-08 | 2021-12-28 | 杭州亿美光电科技有限公司 | Novel embedded intelligent control's mixing of colors down lamp of adjusting luminance |
| CN216217644U (en) * | 2021-10-22 | 2022-04-05 | 佛山市顺德区常铭光电科技有限公司 | LED lamp bank control circuit |
| CN114126142A (en) * | 2021-11-05 | 2022-03-01 | 深圳市瑞晶实业有限公司 | Trinity dimmer circuit of output current precision is adjusted in area |
| CN114340078A (en) * | 2021-11-24 | 2022-04-12 | 中山市爱日照明科技有限公司 | Dimming circuit with adjustable current |
| CN114222402A (en) * | 2021-12-06 | 2022-03-22 | 深圳市星之佑科技有限公司 | Trinity dimmer circuit |
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| CN115278977A (en) | 2022-11-01 |
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