CN109982471A - LED light power supply, power supply control method and LED lamp - Google Patents
LED light power supply, power supply control method and LED lamp Download PDFInfo
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- CN109982471A CN109982471A CN201711447990.3A CN201711447990A CN109982471A CN 109982471 A CN109982471 A CN 109982471A CN 201711447990 A CN201711447990 A CN 201711447990A CN 109982471 A CN109982471 A CN 109982471A
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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]
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Abstract
The invention belongs to LED power technical field, a kind of LED light power supply, power supply control method and LED lamp are provided.The LED light power supply includes power supply body, and the power supply body includes first port, second port and third port；The first LED array and the second LED array are respectively equipped between each port of power supply body, third port is connected to ground, power supply body samples the first LED array to obtain the first sampled signal by first port and second port, is compared to obtain error signal with the reference voltage signal being set in advance according to first sampled signal；Power supply body adjusts the voltage between each port according to the error signal；Efficiently solve the problems, such as that LED light power supply can not uniformly apply the application efficiency that the power supply is reduced in the LED light with different operating voltage and after load current-limiting resistance in the case where being not loaded with current-limiting resistance in the prior art through the invention.
Description
Technical field
The invention belongs to LED power technical field more particularly to a kind of LED light power supplies, power supply control method
And LED lamp.
Background technique
LED (Light Emitting Diode, light emitting diode) lamp due to its have energy conservation, the long-life, it is environmentally protective,
Without stroboscopic, the advantages that low voltage operating is safe and reliable, antidetonation impact resistance, applied every field in the industry；Work as LED light
During the work time, need to load LED light constant voltage or constant electric current, in the prior art, LED light power supply electricity
Source mainly in such a way that constant-voltage mode exports, guarantees the voltage stabilization at LED light both ends, Huo Zhetong by current-limiting resistance
The mode of multiple LED tandem workings is crossed, guarantees to stablize by the running current in LED light.
Therefore, the existing technology has at least the following problems: driving LED light to work according to constant-voltage mode, then not
The voltage rating of the LED light of same type is not identical, when kept using current-limiting resistance LED light both ends voltage maintain it is constant
When, current-limiting resistance will lead to biggish electric energy loss, reduce the delivery efficiency of power supply；If being not loaded with current-limiting resistance in load end
In the case where, which can not uniformly apply in the LED light with different operating voltage, and flexibility reduces, therefore existing
Have that LED light power supply is exported in technology stabilized power source power can not the generality flexibility that is applicable in and applies be low asks
Topic.
Summary of the invention
The present invention provides a kind of LED light power supply, power supply control method and LED lamp, it is intended to solve existing skill
Stabilized power source power provided by LED light power supply can not generality is applicable in and application flexibility is low problem in art.
First aspect present invention provides a kind of LED light power supply, including power supply body, and the power supply body includes first
Port, second port and third port, in which:
Between the first port and the second port for access the first LED array, the first port with
For accessing the second LED array between the third port, the third port is connected to ground, wherein first LED array
Including N number of concatenated LED lamp bead, second LED array includes M first LED array in parallel, and wherein N and M is big
In or equal to 1 positive integer；
The power supply body sample to first LED array by the first port and the second port
To the first sampled signal, it is compared to obtain error signal with reference voltage signal according to first sampled signal；
The power supply body adjusts the voltage between the first port and the second port according to the error signal
And the voltage between the first port and third port.
Further, the power supply body includes voltage control loop, resistance, the first operational amplifier and the second operation
Amplifier；
Wherein the voltage control loop is used to adjust the first port and the second end according to the error signal
The voltage between voltage and the first port and the third port between mouthful, the first end of the voltage control loop
For the first port, the resistance is connected between the second port and the third port, first operation amplifier
The noninverting input of device for connect with the second port, the reverse input end of first operational amplifier for it is described
Third port connection, the output end of first operational amplifier are connect with the noninverting input of the second operational amplifier,
The reverse input end of the second operational amplifier connects the reference voltage signal, the output end of the second operational amplifier with
The second end of the voltage control loop connects.
Second aspect of the present invention provides a kind of LED light power supply control method, including LED light as described above power supply electricity
Source；The LED light power supply control method specifically:
First LED array is sampled to obtain the first sampling letter by the first port and the second port
Number；
The power supply body generates error signal according to first sampled signal and the reference voltage signal；
The power supply body adjusts the voltage between the first port and the second port according to the error signal
And the voltage between the first port and the third port.
Third aspect present invention provides a kind of LED lamp, including with N number of concatenated LED lamp bead the first LED array and
The second LED array with M first LED array in parallel, wherein N and M is the positive integer more than or equal to 1, institute
Stating LED lamp further includes LED light power supply as described above.
The present invention acquired advantageous effects compared with the existing technology are as follows: in above-mentioned LED light power supply；Pass through
First port and second port sample the first LED array to obtain the first sampled signal, and are mentioned according to the first LED array
Preceding to set the reference voltage signal for being best suitable for its nominal working conditions, power supply body is believed according to the first sampled signal and reference voltage
It number is compared to obtain error signal, so that power supply body is adjusted between first port and second port according to the error signal
Voltage between voltage and first port and third port, it is ensured that the first LED array and the second LED array all in stabilization,
The working condition of safety；When the quantity of the LED light in LED array is reduced or is increased, which passes through first end
Mouthful and second port real-time sampling is carried out to the first LED array and can make voltage between first port and second port and the
Voltage between Single port and third port is maintained at steady state, and strong flexibility, practicability are high；Effectively overcome existing skill
LED light power supply can not be applied uniformly in the case where load end is not loaded with current-limiting resistance with different operating voltage in art
LED light in, and load current-limiting resistance after the electric energy loss due to caused by the fever of resistance, the power supply application efficiency
Problem low, application flexibility is lower.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of circuit structure diagram of LED light power supply provided in an embodiment of the present invention；
Fig. 2 is a kind of implementation flow chart of LED light power supply control method provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of LED lamp provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the circuit structure diagram of LED light power supply provided in an embodiment of the present invention, for ease of description, only
Part related to the embodiment of the present invention is shown, details are as follows:
As shown in Figure 1, the LED light power supply includes: first port V+, second port V1- and third port V2-；
Wherein for accessing first 1~N of LED array between first port V+ and second port V1-, in first port V+ and third end
For accessing second 1~M of LED array between mouth V2-, third port V2- is connect with ground GND, wherein first LED array 1~N packet
N number of concatenated LED lamp bead is included, second 1~M of LED array includes M first 1~N of LED array in parallel, and wherein N and M is big
In or equal to 1 positive integer.
Specifically, power supply body PSU adopts first 1~N of LED array by first port V+ and second port V1-
Sample obtains the first sampled signal, according to the first sampled signal and reference voltage signal VREFIt is compared to obtain error signal.
It should be noted that include N number of concatenated LED light in the first LED array, wherein herein the quantity of LED light with
And the performance parameters such as specification can all carry out any change according to actual needs, power supply body PSU passes through first port V+ and second
Port V1-, which samples the running current in first 1~N of LED array, obtains the first sampled signal, first sampled signal
For detecting the actual working state of LED light in first 1~N of LED array.
Specifically, reference voltage signal VREFIt is set in advance according to first 1~N of LED array, when in first 1~N of LED array
When LED light including different size, according to performance parameter (such as rated power, resistance value, the voltage rating of first 1~N of LED array
At least one of in) the reference voltage signal V for being best suitable for its nominal working conditions can be set in advanceREF；Power supply body PSU root
According to the first sampled signal and reference voltage signal VREFIt is compared to obtain error signal, the error signal is for detecting the first LED
The voltage fluctuation situation at the both ends 1~N of array.
Specifically, power supply body PSU adjusts the electricity between first port V+ and second port V1- according to the error signal
Pressure and the voltage between first port V+ and third port V2-, to make the voltage and second at the first both ends 1~N of LED array
The voltage at the both ends 1~M of LED array keeps stablizing, it is ensured that normal, the stable operation of LED light.
By inventive embodiments, when the first sampled signal and reference voltage signal VREFWhen being compared to obtain error signal,
Power supply body PSU keeps first 1~N of LED array and the voltage at the second both ends 1~M of LED array constant according to the error signal,
So that LED light is unanimously in optimum Working, and is not necessarily to external current-limiting resistance, LED in the load end of the LED light power supply
The quantity of LED light in array can arbitrarily increase and decrease, and reduce the electric energy loss and the LED light of LED light power supply output
Power supply can be applicable in the LED light with different operating voltage range, and flexibility is high；To efficiently solve existing skill
LED light power supply is not loaded with current-limiting resistance just in load end and can not uniformly apply in the LED with different operating voltage in art
The LED light power supply application efficiency is low in lamp, or after load current-limiting resistance, the low problem of flexibility.
Specifically, power supply body PSU includes voltage control loop 101, resistance 102, the first operational amplifier OP1 and
Two operational amplifier OP2.
Specifically, voltage control loop 101 is adjusted between first port V+ and second port V1- according to the error signal
Voltage and first port V+ and third port V2- between voltage, the first end of voltage control loop 101 is first port
V+, resistance 102 are connected between second port V1- and third port V2-, and the noninverting input of the first operational amplifier OP1 is used
It is connect in second port V1-, the reverse input end of the first operational amplifier OP1 with third port V2- for connecting；It is optional
, the noninverting input and reverse input end and resistance 102 of the first operational amplifier OP1 is connected directly or the first operation amplifier
The noninverting input of device OP1 is connected by external ratio enlargement resistance with resistance 102 with reverse input end, the first operation amplifier
The output end of device OP1 is connect with the noninverting input of second operational amplifier OP2, the reversed input of second operational amplifier OP2
Terminate reference voltage signal VREF, the output end of second operational amplifier OP2 connect with the second end of voltage control loop 101.
Specifically, the resistance value of resistance 102 is minimum, so that it is guaranteed that the potential of the potential of second port V1- and third port V2-
Approximately equal, i.e., the voltage at the first both ends 1~N of LED array is approximately equal with the voltage at the second both ends 1~M of LED array, thus
Voltage between voltage between first port V+ and second port V1- and first port V+ and third port V2- has identical
Fluctuation.
Specifically, the first operator amplifier OP1 is used to detect the variation feelings of running current in first 1~N of LED array
Condition；In actual application, when the running current in first 1~N of LED array changes, although the running current
Changing value very little generates the first sampled signal after the first operational amplifier OP1 amplifies the current fluctuation；When this
When first sampled signal is transferred to the noninverting input of second operational amplifier OP2, the reversed input of second operational amplifier OP2
Terminate reference voltage signal VREF, second operational amplifier OP2 is according to the first sampled signal and reference voltage signal VREFIt is missed
Difference signal can measure the fluctuation situation of voltage between first port V+ and second port V1- by the error signal, if the mistake
The amplitude of difference signal is bigger, then the voltage fluctuation amplitude at the first both ends 1~N of LED array is bigger；Further, power supply body PSU
The voltage at the first both ends 1~N of LED array and the voltage at the second both ends 1~M of LED array are restored to according to the error signal
Stable state.
Specifically, voltage control loop 101 includes MOS switch pipe, transformer and diode etc., voltage control loop
101 external AC power sources, by inputting control signal appropriate to MOS switch pipe, so that the voltage control loop 101 can be to
First port V+ and second port V1- and first port V+ and third port V2- exports constant voltage, provides for the LED light
Stable electric energy；Optionally, by adjusting the duty ratio for controlling signal in MOS switch pipe, voltage control loop 101 can be adjusted
The constant voltage size of output, and then ensure that first 1~N of LED array and second 1~M of LED array are in best effort shape
State.
Specifically, Fig. 2 shows the implementation process of LED light power supply control method provided in an embodiment of the present invention, packet
LED light power supply as described above is included, details are as follows:
Step S201: first 1~N of LED array is sampled to obtain first by first port V+ and second port V1-
Sampled signal.
Step S202: power supply body PSU is according to the first sampled signal and reference voltage signal VREFGenerate error signal.
Step S203: power supply body PSU adjusts the voltage between first port V+ and second port V1- according to error signal
And the voltage between first port V+ and third port V2-.
Through the embodiment of the present invention, pass through first port V+ and second end in above-mentioned LED light power supply control method
Mouth V1- is sampled to obtain the first sampled signal to first 1~N of LED array, you can learn that running in first 1~N of LED array
The actual size of electric current, and then according to the first sampled signal and reference voltage signal VREFError signal is generated, is believed based on the error
Number power supply body PSU can make first 1~N of LED array and second 1~M of LED array keep optimal steady-working state, drop
The low industrial cost of the LED light power supply, the scope of application are wider；To effectively overcome LED light confession in the prior art
The problem that the industrial cost of power supply is excessively high and flexibility is low.
Specifically, Fig. 3 shows the structural schematic diagram of LED lamp 30 provided in an embodiment of the present invention, LED lamp 30 includes
First 1~N of LED array with N number of concatenated LED lamp bead and the 2nd LED with M first 1~N of LED array in parallel
1~M of array, wherein N and M is the positive integer more than or equal to 1, and LED lamp 30 includes LED light power supply as described above
301。
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Distinguished with another entity, without necessarily requiring or implying between these entities there are any this actual relationship or
Person's sequence.And the terms "include", "comprise" or any other variant are intended to non-exclusive inclusion, so that packet
Include the product of a series of elements or the element that structure is intrinsic.In the absence of more restrictions, by sentence " packet
Include ... " or " including ... " limit element, it is not excluded that at process, method, article or end including the element
There is also other elements in end equipment.In addition, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this
Number；" more than ", " following ", " within " etc. be interpreted as including this number.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (4)
1. a kind of LED light power supply, which is characterized in that including power supply body, the power supply body includes first port, second
Port and third port, in which:
Between the first port and the second port for access the first LED array, the first port with it is described
For accessing the second LED array between third port, the third port is connected to ground, wherein first LED array includes
N number of concatenated LED lamp bead, second LED array include M first LED array in parallel, wherein N and M be greater than or
Person is equal to 1 positive integer；
The power supply body samples first LED array to obtain by the first port and the second port
One sampled signal is compared to obtain error signal with reference voltage signal according to first sampled signal；
The power supply body according to the error signal adjust voltage between the first port and the second port and
Voltage between the first port and third port.
2. LED light power supply according to claim 1, which is characterized in that the power supply body includes that voltage controls back
Road, resistance, the first operational amplifier and second operational amplifier；
Wherein the voltage control loop be used to be adjusted according to the error signal first port and the second port it
Between voltage and the first port and the third port between voltage, the first end of the voltage control loop is institute
First port is stated, the resistance is connected between the second port and the third port, first operational amplifier
For connecting with the second port, the reverse input end of first operational amplifier is used for and the third noninverting input
Port connection, the output end of first operational amplifier is connect with the noninverting input of the second operational amplifier, described
The reverse input end of second operational amplifier connects the reference voltage signal, the output end of the second operational amplifier with it is described
The second end of voltage control loop connects.
3. a kind of LED light power supply control method, which is characterized in that including LED such as of any of claims 1-2
Lamp power supply；The LED light power supply control method specifically:
First LED array is sampled to obtain the first sampled signal by the first port and the second port；
The power supply body generates error signal according to first sampled signal and the reference voltage signal；
The power supply body according to the error signal adjust voltage between the first port and the second port and
Voltage between the first port and the third port.
4. a kind of LED lamp, including the first LED array with N number of concatenated LED lamp bead and with M in parallel described the
Second LED array of one LED array, wherein N and M is the positive integer more than or equal to 1, which is characterized in that further includes such as power
Benefit requires LED light power supply described in any one of 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447990.3A CN109982471B (en) | 2017-12-27 | 2017-12-27 | LED lamp power supply, power supply control method and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447990.3A CN109982471B (en) | 2017-12-27 | 2017-12-27 | LED lamp power supply, power supply control method and LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN109982471A true CN109982471A (en) | 2019-07-05 |
| CN109982471B CN109982471B (en) | 2021-06-29 |
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ID=67072173
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110025216A1 (en) * | 2009-07-30 | 2011-02-03 | Advanced-Connectek, Inc. | Light Emitting Diode (LED) Driver And Associated LED Driving Method |
| KR20120110996A (en) * | 2011-03-31 | 2012-10-10 | 한국전기연구원 | Control apparaus for power supply used for driving led |
| CN104254181A (en) * | 2014-09-18 | 2014-12-31 | 电子科技大学 | Multichannel LED array drive circuit |
| CN105657927A (en) * | 2014-11-14 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source driving circuit and light source electric energy control circuit |
| CN106131996A (en) * | 2016-06-24 | 2016-11-16 | 成都芯源系统有限公司 | Light emitting diode driving system and driving method thereof |
-
2017
- 2017-12-27 CN CN201711447990.3A patent/CN109982471B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110025216A1 (en) * | 2009-07-30 | 2011-02-03 | Advanced-Connectek, Inc. | Light Emitting Diode (LED) Driver And Associated LED Driving Method |
| KR20120110996A (en) * | 2011-03-31 | 2012-10-10 | 한국전기연구원 | Control apparaus for power supply used for driving led |
| CN104254181A (en) * | 2014-09-18 | 2014-12-31 | 电子科技大学 | Multichannel LED array drive circuit |
| CN105657927A (en) * | 2014-11-14 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source driving circuit and light source electric energy control circuit |
| CN106131996A (en) * | 2016-06-24 | 2016-11-16 | 成都芯源系统有限公司 | Light emitting diode driving system and driving method thereof |
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| Publication number | Publication date |
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| CN109982471B (en) | 2021-06-29 |
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