CN1619451A - Multifunction constant flow module used for high power LED - Google Patents
Multifunction constant flow module used for high power LED Download PDFInfo
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- CN1619451A CN1619451A CN 200410089235 CN200410089235A CN1619451A CN 1619451 A CN1619451 A CN 1619451A CN 200410089235 CN200410089235 CN 200410089235 CN 200410089235 A CN200410089235 A CN 200410089235A CN 1619451 A CN1619451 A CN 1619451A
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- 230000033228 biological regulation Effects 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000002775 capsule Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000005286 illumination Methods 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The present invention relates to an pulse constant-current module for LED illumination. It is composed of controllable current unit, sampling comparison unit and amplification and regulation unit. Its outputted current can be controlled by pulse signal. Said pulse constant-current module has the practical functions of that it can make output magnitude be stable and adjustable, and can implement ON/OFF under the action of various control circuits.
Description
Technical field
The present invention relates to be used for the constant current device of great power LED power supply, particularly relate to the multifunction constant flow module of great power LED.
Background technology
Great power LED has the requirement of ideal source: electric current is a pulse waveform, its EDM Generator of Adjustable Duty Ratio, its constant amplitude and adjustable.The steady current that existing constant flow module and constant current device output are all direct current can not satisfy the requirement of LED to optimal power supply.The patent No. 94103758.4 provides a kind of constant flow module of direct current, form by constant-current circuit module and control module thereof and modulation circuit module, though it can provide the electric current of several amperes of levels, output be DC current.
Summary of the invention
The present invention is directed to the requirement of great power LED, and prior art can not satisfy the needs of great power LED, aim to provide a kind of multifunction constant flow module that is used for great power LED, its input, output are pulse waveform, output current amplitude stabilization and scalable, the advantageous characteristic that the signal source load current is but very little.
The present invention is used for the multifunction constant flow module of great power LED, form by constant-current circuit module and control module thereof and modulation circuit module, the pulse input stage is set is modulated output current by pulse signal, be provided with " Power Groud " and " signal ground ", the ground of exporting big current return and prime signal transmission loop is kept apart; The common ground end V of comparison amplifier, reference source, the modulated pulse signal input utmost point and manual current regulation unit
In -, V
In -Double as input power cathode and " signal ground " exit; The anodal exit that modulating pulse input stage, reference source and comparison amplifier three import power supply is V
In +Manually another termination of current regulation unit is regulated exit Adj.
The present invention is provided with the pulse input stage and by pulse signal output current is modulated, and realizes the requirement of LED extremely low power dissipation, gets rid of electrical interference, the amplitude stability of output current, adjustable.
The multifunction constant flow module that the present invention is used for great power LED can use with the following methods:
(a) insert pulse signal at pulsed modulation end M, module is promptly exported pulse current.Modulation source output pulse amplitude U
mBe 1/3V
In＜U
m＜=(V
In-2) V.V wherein
InBe pulse power voltage, minimum pulse width t
Onin=105 μ s, the current load ability of impulse source＞=0.1 μ A.
(b) if modulated terminal M is received V by a resistance
In +End, the also exportable DC current of module, its big I realizes regulating by the adjustable little power consumption resistance that adjustable side Adj inserts.
(c) if at power positive end and V
In +Be connected in series relay contact between end, promptly the output current of number of modules ampere can be realized ON/OFF (ON/OFF) operation under the control of various control circuits, and the relay contact electric current is not more than 5mA.
The good effect that the present invention produces is:
By pulsed modulation end M input pulse signal electric current is carried out pulsed modulation.Its current amplitude is stable, adjustable, and the signal source load current is not less than 0.1 μ A.
The present invention is a single power supply, and its output current can reach several amperes.Successfully realized the shutoff fully of module output current when the M input voltage is zero.
High performance unipolar transistor has been adopted in module output, makes rising of module that voltage and power consumption are further reduced, and guarantees the low energy consumption operation of semiconductor lamp under various application occasions.
Description of drawings
Fig. 1 is the multifunction constant flow module electrical block diagram of great power LED
Fig. 2 is the multifunction constant flow module circuit theory diagrams of great power LED
Among the figure: pulse input stage-1, manual current regulation unit-2, reference source-3, comparison amplifier-4, current adjustment unit-5, sampling unit-6, direct supply-7, pulsed modulation end M regulates exit Adj, input positive source exit V
In +
Below in conjunction with accompanying drawing content of the present invention is elaborated:
Embodiment
Referring to accompanying drawing 1
The present invention is used for the multifunction constant flow module of great power LED, form by constant-current circuit and control thereof and modulation circuit, be installed in the flat rectangle capsule, the heat radiator of big current element is welded on the metal cover board as heat sink in the current adjustment unit 5, its negative terminal is connected with an end of sampling unit 6, and the other end of sampling unit 6 is " Power Groud " exit GND; The common ground end V of comparison amplifier 4 and reference source 3, modulated pulse signal input stage 1, manual current regulation unit 2 four
In -, double as input power cathode and " signal ground " exit; Manually another termination of current regulation unit 2 is regulated exit Adj; The input end of modulated pulse signal is pulsed modulation end M, and modulating pulse input stage 1, reference source 3, comparison amplifier 4 threes' input positive source exit is V
In +
Fig. 2 has specifically described the case that is used for 10w LED Solar lamp, and output current is the constant flow module of 2A.Wherein current adjustment unit 5 adopts high-performance MOS type power tube, and manually current regulation unit 2 adopts 5.6K Ω potentiometer, shell sizes: 45 * 30 * 10mm
3
The technical parameter that this case study on implementation reaches is as follows:
1, pulsed modulation end M connects pulse signal source, and the input pulse voltage magnitude is 4V, and frequency is 1KHz, and the manual adjustments electric current is the situation of 1A during with respect to DC operation.
The output current pulse amplitude is 1.4A, frequency 1KHz.
If reduce the dutycycle of input pulse, the output current pulse width reduces, and minimum pulse width is 104 μ s
2, if pulsed modulation end M meets V by a 10K Ω resistance
In +Module works in the DC operation state, and electric current is that 0-1.2A is adjustable, its direct supply 12V, metal-oxide-semiconductor pressure drop 1.5V, power consumption 1.5W.
3, J is the photoswitch normally opened contact, when a little less than the illumination, and the J closure, the LED lamp is bright.When illumination was strong, J opened, and the LED lamp extinguishes.
Claims (5)
1, a kind of multifunction module that is used for great power LED, form by constant-current circuit and control thereof and modulation circuit, be installed in the flat rectangle capsule, it is characterized in that: the heat radiator of big current element is welded on the metal cover board as heat sink in the current adjustment unit (5), its negative terminal is connected with an end of sampling unit (6), and the other end of sampling unit (6) is " Power Groud " exit GND; The common ground end V of comparison amplifier (4) and reference source (3), modulated pulse signal input stage (1), manual current regulation unit (2) four
In -, double as input power cathode and " signal ground " exit; Manually another termination of current regulation unit (2) is regulated exit Adj; The input end of modulated pulse signal is pulsed modulation end M, and modulating pulse input stage (1), reference source (3), comparison amplifier (4) three's input positive source exit is V
In +
2, the multifunction module that is used for great power LED according to claim 1 is characterized in that: manually current regulation unit (2) adopts 5.6K Ω potentiometer, and current adjustment unit (5) adopts the MOS power tube.
3, the multifunction module using method that is used for great power LED according to claim 1, it is characterized in that: insert pulse signal at pulsed modulation end M, module output pulse current, its current amplitude is stable, adjustable, and the signal source load current is not more than 0.1 μ A.
4, the multifunction module using method that is used for great power LED according to claim 1, it is characterized in that: M receives V by a resistance with the pulsed modulation end
In +End, module is promptly exported the direct current steady current, and its big I realizes regulating by the adjustable little power consumption resistance that adjustable side Adj inserts.
5, the multifunction module using method that is used for great power LED according to claim 1 is characterized in that: at power positive end and V
In +Be connected in series relay contact between end, the output current of number of modules ampere can be realized the ON/OFF operation under the control of various control circuits, and the condenser contact current is not more than 5mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089235 CN1619451A (en) | 2004-12-03 | 2004-12-03 | Multifunction constant flow module used for high power LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089235 CN1619451A (en) | 2004-12-03 | 2004-12-03 | Multifunction constant flow module used for high power LED |
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| Publication Number | Publication Date |
|---|---|
| CN1619451A true CN1619451A (en) | 2005-05-25 |
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|---|---|---|---|
| CN 200410089235 Pending CN1619451A (en) | 2004-12-03 | 2004-12-03 | Multifunction constant flow module used for high power LED |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009067923A1 (en) * | 2007-11-14 | 2009-06-04 | Honhung Lo | Dc low voltage distribution box for indoor multi leds lamp |
| CN101552563B (en) * | 2009-03-20 | 2011-09-14 | Bcd半导体制造有限公司 | Device and method for controlling constant-current output in switch power supply |
| CN102811536A (en) * | 2012-07-09 | 2012-12-05 | 深圳创维－Rgb电子有限公司 | Constant-current control circuit |
| CN107517509A (en) * | 2016-06-15 | 2017-12-26 | 刘志锋 | A kind of great power LED UV lamp control system of efficient energy-saving |
-
2004
- 2004-12-03 CN CN 200410089235 patent/CN1619451A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009067923A1 (en) * | 2007-11-14 | 2009-06-04 | Honhung Lo | Dc low voltage distribution box for indoor multi leds lamp |
| CN101552563B (en) * | 2009-03-20 | 2011-09-14 | Bcd半导体制造有限公司 | Device and method for controlling constant-current output in switch power supply |
| CN102811536A (en) * | 2012-07-09 | 2012-12-05 | 深圳创维－Rgb电子有限公司 | Constant-current control circuit |
| CN102811536B (en) * | 2012-07-09 | 2015-05-20 | 深圳创维－Rgb电子有限公司 | Constant-current control circuit |
| CN107517509A (en) * | 2016-06-15 | 2017-12-26 | 刘志锋 | A kind of great power LED UV lamp control system of efficient energy-saving |
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| WD01 | Invention patent application deemed withdrawn after publication |