CN209448941U - A kind of LED constant current power supply unit - Google Patents
A kind of LED constant current power supply unit Download PDFInfo
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- CN209448941U CN209448941U CN201822113922.XU CN201822113922U CN209448941U CN 209448941 U CN209448941 U CN 209448941U CN 201822113922 U CN201822113922 U CN 201822113922U CN 209448941 U CN209448941 U CN 209448941U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
A kind of LED constant current power supply unit, conversion circuit, cue circuit, two sets of voltage-stabilizing constant-sources and conversion circuit, cue circuit installation are on circuit boards, circuit board is mounted in subassembly wrapper, conversion circuit, cue circuit, two sets connect and be mounted in subassembly wrapper through conducting wire between voltage-stabilizing constant-source and LED illumination lamp.In the utility model use; when main power source becomes larger or becomes smaller because output electric current occurs for a variety of causes; conversion circuit can automatically switch to backup power source as the power supply such as LED illumination lamp or advertising information, decorative display screen; guarantee the normal work of LED illumination lamp or advertising information, decorative display screen etc.; simultaneously will not be damaged because of high current, low current work it is abnormal; it can also be after main power source breaks down; by warning lamp shine give user prompt safeguard in time, thus the protective effect played to LED illumination lamp or advertising information, decorative display screen etc. for electric energy.Based on above-mentioned, so the application prospect that the utility model has had.
Description
Technical field
The utility model relates to the corollary equipments fields such as LED illumination lamp or LED advertising information display screen, especially a kind of
LED constant current power supply unit.
Background technique
LED is used as headlamp or advertising information, decorative display screen etc., due to long service life, power saving, shining
The features such as high-efficient, is using extremely extensively.LED is as headlamp or advertising information, decorative display screen etc. in use, needing mating
Regulated power supply power for it.LED is as headlamp or advertising information, decorative display screen etc. in use, being generally adopted by simultaneously
Alliance power mode.Since the operating current of every single LED lamp bead cannot be excessively high, excessively high operating current will lead to LED lamp bead because of electricity
It flows through big and damage, therefore to be configured with pressure stabilizing permanent for LED illumination lamp under parallel operation mode or advertising information, decorative display screen
The power supply of stream, to guarantee the headlamp or advertising information, decoration of several LED lamp beads composition under parallel operation mode
Display screen can work normally.
It is existing to be used as the matching used voltage-stabilizing constant-source such as LED illumination lamp or advertising information, decorative display screen, in reality
In, by the element function quality difference used, use time difference, use environment different, and external 220V electricity
The big influence of fluctuations in source, voltage-stabilizing constant-source have the hidden danger for breaking down and power output end output electric current being caused to get higher or be lower,
After the excessively high power supply of electric current enters the power inputs such as LED illumination lamp or advertising information, decorative display screen in this way, due to LED light
Pearl cannot bear relatively high electric current, be easy because electric current it is excessively high caused by LED illumination lamp or advertising information, decorative display screen etc. damage
It is bad, to user bring unnecessary economic loss, especially high value LED application product damage when but will to user with
Come huge economic loss (such as the higher LED video display screen of cost of manufacture)；And the too low power supply of electric current enters LED illumination lamp
Or after the power inputs such as advertising information, decorative display screen, since electric current is too low, and will lead to LED illumination lamp or advertising information,
The luminous intensities such as decorative display screen are lower or even do not shine.
Utility model content
In order to overcome the matching used voltage-stabilizing constant-source such as existing LED illumination lamp or advertising information, decorative display screen because
Structure limit there are the drawbacks of, the utility model provide in use, when main power source because a variety of causes occur output electric current becomes larger
Or when becoming smaller, conversion circuit can automatically switch to backup power source and power for LED illumination lamp or advertising information, decorative display screen etc.,
Guarantee the normal work of LED illumination lamp or advertising information, decorative display screen etc., while will not be damaged because of high current, low current
Work abnormal, moreover it is possible to after main power source breaks down, by warning lamp shine give user prompt safeguard in time, from
And a kind of LED constant current for the protective effect played to LED illumination lamp or advertising information, decorative display screen etc. for electric energy is for Denso
It sets.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of LED constant current power supply unit, including two sets of voltage-stabilizing constant-sources, the power supply output of first set voltage-stabilizing constant-source
Voltage, the electric current of the power output end 3 and the output of 4 feet of holding 3 and 4 feet and second set of voltage-stabilizing constant-source are consistent, and two sets of pressure stabilizings are permanent
The power input in galvanic electricity source is in parallel and connects respectively through conducting wire with 220V AC power source the two poles of the earth, it is characterised in that also has conversion
On circuit boards, circuit board is mounted on for circuit, cue circuit, two sets of voltage-stabilizing constant-sources and conversion circuit, cue circuit installation
In subassembly wrapper, the first via power output end of first set voltage-stabilizing constant-source and two signal input parts of conversion circuit and
Control tip side is connected through conducting wire respectively all the way, the second road power output end of first set voltage-stabilizing constant-source and conversion circuit
Two power inputs are connected through conducting wire respectively, the power output end of second set of voltage-stabilizing constant-source and the second tunnel of conversion circuit
Control tip side is connected through conducting wire respectively, the control power output end of conversion circuit and the power input both ends point of LED illumination lamp
It is not connected through conducting wire, the cathode power supply output end of conversion circuit is connected with cue circuit signal input part through conducting wire, and first set is steady
The negative power supply input terminal of the negative power supply output end and cue circuit of pressing constant-current supply is through wired earth.
The conversion circuit includes one-chip computer module, relay and resistance, is connected therebetween through circuit board wiring, single-chip microcontroller mould
Block main control chip is STC12C5A60S2, and two signal input parts 3 of one-chip computer module and 4 feet connect with two resistance one end respectively
Connect, two resistance other ends are connected with two normally-closed contact ends of relay respectively, the control power output end of one-chip computer module and
The connection of relay cathode power supply input terminal, 2 foot of negative power supply input terminal and relay negative power supply of one-chip computer module finished product are defeated
Enter end connection.
The cue circuit includes resistance, silicon-controlled, relay and warning lamp, is connected therebetween through circuit board wiring, resistance
One end is connected with SCR control pole, and silicon-controlled anode is connected with relay control tip side, and silicon-controlled cathode and relay are just
The connection of pole power input, relay normally open contact end are connected with warning lamp cathode power supply input terminal, and relay negative power supply is defeated
Enter end to connect with warning lamp negative power supply input terminal.
The utility model beneficial effect is: the utility model in use, usually first set voltage-stabilizing constant-source as main power source its
When out-put supply electric current is stablized, it is LED illumination lamp or advertising information, dress that conversion circuit, which automatically switches first set voltage-stabilizing constant-source,
The power supply such as display screen is adornd, guarantees the normal work of headlamp or advertising information, decorative display screen etc..When in use, main power source because
When a variety of causes generation output electric current becomes larger or becomes smaller, conversion circuit can automatically switch to second set of pressure-stabilizing constant flow electricity of backup power source
Source is the power supply such as LED illumination lamp or advertising information, decorative display screen, guarantees headlamp or advertising information, decorative display screen etc.
Work normally, at the same will not be damaged because of high current, low current work it is abnormal, moreover it is possible to after main power source breaks down, pass through
Warning lamp, which shines, gives the maintenance that user's prompt carries out main power source in time, and after main power source is safeguarded, conversion circuit is automatically again
Switch first set voltage-stabilizing constant-source as the power supply such as LED illumination lamp or advertising information, decorative display screen.The utility model can be to headlamp
Or the power supply protection that advertising information, decorative display screen etc. can play the role of, especially the LED application product protection of high value is answered
It is more preferable with effect, the economic loss of user can be effectively reduced.Based on above-mentioned, so the application prospect that the utility model has had.
Detailed description of the invention
The utility model is described further below in conjunction with drawings and examples.
Fig. 1 is the utility model structure diagram.
Fig. 2 is the block diagram of the utility model.
Fig. 3 is the utility model circuit diagram.
Specific embodiment
Fig. 1, shown in 2, a kind of LED constant current power supply unit, the mating pressure-stabilizing constant flow including two sets for LED illumination lamp power supply
Power supply 1 and 2, electricity needed for there is first set voltage-stabilizing constant-source 1 two-way power output end, 3 and 4 feet to export LED illumination lamp work
Source, 5 and 4 feet export 5V DC power supply, and second set of voltage-stabilizing constant-source 2 has power output end all the way, export LED illumination lamp work
Power supply needed for making, the power output end 3 and 4 feet of first set voltage-stabilizing constant-source 1 and the power supply of second set of voltage-stabilizing constant-source 2 are defeated
Outlet 3 and voltage, the electric current of the output of 4 feet are consistent, two sets voltage-stabilizing constant-sources 1 and 2 power input it is in parallel and with 220V friendship
Stream two poles are connected through conducting wire respectively, also have conversion circuit 3, cue circuit 4, two sets of voltage-stabilizing constant-sources 1 and 2 and conversion
On circuit boards, circuit board is mounted in subassembly wrapper 5 for circuit 3, the installation of cue circuit 4, and the first of first set voltage-stabilizing constant-source 1
Road power output end is connected through conducting wire respectively with two signal input parts and the first via of conversion circuit 3 control tip side, the
Second road power output end of a set of voltage-stabilizing constant-source 1 is connected through conducting wire respectively with two power inputs of conversion circuit 3,
The power output end of second set of voltage-stabilizing constant-source 2 is connected through conducting wire respectively with the second tunnel of conversion circuit 3 control tip side, is turned
Change the control power output end of circuit 3 and the power input two of LED illumination lamp (several single LED lamp beads form LED illumination lamp)
End is connected through conducting wire respectively, and the cathode power supply output end of conversion circuit 3 is connected with 4 signal input part of cue circuit through conducting wire, the
The negative power supply output end of a set of voltage-stabilizing constant-source 1 and the negative power supply input terminal of cue circuit 4 are through wired earth.Warning lamp
The front end light-emitting surface of 4-1 is located at outside subassembly wrapper front middle part aperture.
Fig. 2, shown in 3, conversion circuit includes one-chip computer module A2, relay J and resistance R1 and R2, therebetween through circuit board
Wiring connection, one-chip computer module A2 are the one-chip computer module finished product that main control chip is STC12C5A60S2, one-chip computer module finished product
A2 has signal input part 3 and 4 feet and control 5 foot of power output end all the way, in one-chip computer module finished product A2 itself function
Under effect, when one-chip computer module finished product A2 signal input part inputs different signal codes, the control of one-chip computer module finished product A2
5 foot of power output end can output cathode power supply, two signal input parts 3 of one-chip computer module finished product A2 and 4 feet respectively with two electricity
The connection of the one end R1 and R2 is hindered, two resistance R1 and the R2 other ends are connected with the two normally-closed contact ends relay J respectively, single-chip microcontroller mould
5 foot of control power output end of block finished product J is connected with relay J cathode power supply input terminal, the cathode of one-chip computer module finished product A2
2 foot of power input is connected with relay J negative power supply input terminal.Cue circuit includes resistance R3, silicon-controlled VS, relay J1
With warning lamp H, connected therebetween through circuit board wiring, the one end resistance R3 is connected with silicon-controlled VS control electrode, silicon-controlled VS anode and
Relay J controls tip side connection, and silicon-controlled VS cathode is connected with relay J1 cathode power supply input terminal, the normally opened touching of relay J1
Point end is connected with warning lamp H cathode power supply input terminal, relay J1 negative power supply input terminal and warning lamp H negative power supply input terminal
Connection, the front end light-emitting surface of warning lamp H are located at outside subassembly wrapper front middle part aperture.
Fig. 2, shown in 3, first set voltage-stabilizing constant-source A1 has two-way power output end, and 3 and 4 feet export LED illumination
3.9V power supply (white light-emitting diode is as LED illumination lamp) needed for lamp LEDN works, 5 and 4 feet export 5V DC power supply (two-way
Power output end shares 4 foot of negative power supply output end).Second set of voltage-stabilizing constant-source A2 has power output end 3 and 4 all the way
Foot, 3.9V power supply needed for output LED illumination lamp LEDN works.The power output end 3 and 4 feet of first set voltage-stabilizing constant-source A1 and
The power output end 3 of second set of voltage-stabilizing constant-source A2 and voltage, the electric current of the output of 4 feet are consistent.Two sets of voltage-stabilizing constant-source A1
And A2 power input 1 and 2 feet it is in parallel and connected respectively through conducting wire with 220V AC power source the two poles of the earth.First set pressure-stabilizing constant flow electricity
The first via power output end 3 and 4 feet of source A1 and two signal input part resistance R1, R2 other ends and first of conversion circuit
Road control two normally-closed contact ends tip side relay J are connected through conducting wire respectively.The second tunnel of first set voltage-stabilizing constant-source A1
Two power inputs 1 of one-chip computer module A2 and 2 feet (VCC and GND) of power output end 5 and 4 feet and conversion circuit pass through respectively
Second tunnel of conducting wire connection, the power output end 3 and 4 feet of second set voltage-stabilizing constant-source A2 and conversion circuit control tip side after
The two normally opened contact ends electric appliance J are connected through conducting wire respectively.Two control contacts control power output end relay J of conversion circuit
End is connected through conducting wire respectively with LED illumination lamp LEDN power input both ends.The cathode power supply output end single-chip microcontroller mould of conversion circuit
5 feet of block A2 are connected with the cue circuit signal input part resistance R3 other end through conducting wire.First set voltage-stabilizing constant-source A1's is negative
The relay J1 negative power supply input terminal of pole power output end and cue circuit is through wired earth.
Fig. 2, shown in 3, when 220V AC power source enters first set voltage-stabilizing constant-source A1, second set of voltage-stabilizing constant-source
After the power input 1 and 2 feet of A2, first set voltage-stabilizing constant-source A1, second set of voltage-stabilizing constant-source A2 can be in obtain electrician
Make state.After first set voltage-stabilizing constant-source A1 work once electrified, its output end 3 and 4 feet can be exported under circuit function inside it
Stable 3.9V DC power supply enter conversion circuit two signal input part resistance R1, R2 other ends and relay J two
Normally-closed contact end；The second road power output end 5 of first set voltage-stabilizing constant-source A1 and 4 feet export stable 5V DC power supply into
Enter two power inputs 1 of one-chip computer module A2 and 2 feet of conversion circuit, then, the one-chip computer module A2 of conversion circuit is in
Work once electrified state.After second set of voltage-stabilizing constant-source A2 work once electrified, inside it under circuit function, second set of pressure-stabilizing constant flow
3 and 4 feet of power supply A2 can export two normally opened contact ends relay J that 3. stable 9V DC power supplies enter conversion circuit.Turn
Change in circuit: usually first set voltage-stabilizing constant-source A1 as main power source its functional out-put supply electric current stablize when, this moment
The current signal of the 3 and 4 feet output of first set voltage-stabilizing constant-source A1 can respectively enter monolithic after resistance R1, R2 are depressured current limliting
The signal input both ends 3 of machine modules A 2 and 4 feet, when the output electric current of first set voltage-stabilizing constant-source A1 is in 6A, this moment through electricity
Enter the signal input both ends 3 of one-chip computer module A2 after hindering R1, R2 decompression current limliting and the signal code of 4 feet is not higher than single-chip microcontroller mould
The maximum current threshold value of block A2 internal preset, for one-chip computer module A2 inside it under circuit function, 5 foot of control output end is not defeated
Power supply out, relay J is in two normally-closed contact end of power failure state and two control tip sides are respectively communicated with, due to relay
Two control tip sides of device J are connected through conducting wire respectively with LED illumination lamp LEDN power input both ends, first set voltage-stabilizing constant-source
The first via power output end 3 and 4 feet of A1 is connected through conducting wire respectively with the two normally-closed contact ends relay J, so this moment, first
The stabilization 3.9V DC power supply of the first via power output end 3 and the output of 4 feet that cover voltage-stabilizing constant-source A1 can enter LED illumination lamp
LEDN power input both ends, LED illumination lamp LEDN work once electrified shine, and guarantee the normal work of LED illumination lamp LEDN；Work as use
In, when first set voltage-stabilizing constant-source A1 is become larger because output electric current occurs for a variety of causes higher than 7A, it is depressured this moment through resistance R1, R2
Signal code after current limliting into the signal input both ends 3 of one-chip computer module A2 and 4 feet is higher than one-chip computer module A2 internal preset
Maximum current threshold value, for one-chip computer module A2 inside it under circuit function, 5 foot out-put supply of control output end enters relay
Device J cathode power supply input terminal, relay J be in two normally-closed contact end of electricity condition and two control tip sides break respectively
It opens, two the normally opened contact end relay J and two control tip sides are respectively turned on；When in use, first set pressure-stabilizing constant flow electricity
When source A1 is lower because output electric current occurs for a variety of causes, is lower than 5A, enter single-chip microcontroller mould after resistance R1, R2 are depressured current limliting this moment
The signal input both ends 3 of block A2 and the signal code of 4 feet are lower than the minimum current threshold value of one-chip computer module A2 internal preset, monolithic
For machine modules A 2 inside it under circuit function, 5 foot out-put supply of control output end enters relay J cathode power supply input terminal,
Relay J be in two normally-closed contact end of electricity condition and two control tip sides are each turned off, two is normally opened by relay J
Tip side and two control tip sides are respectively turned on；Due to two control tip sides of relay J and LED illumination lamp LEDN power supply
Input both ends are connected through conducting wire respectively, the first via power output end 3 and 4 feet and relay J of first set voltage-stabilizing constant-source A1
Two normally-closed contact ends are connected through conducting wire respectively, so the electric current of first set voltage-stabilizing constant-source A1 output is too high or too low, after
Electric appliance J be in after two normally-closed contact end of electricity condition and two control tip sides are each turned off, first set pressure-stabilizing constant flow is electric
The power supply of source A1 output is not further into LED illumination lamp LEDN, in this way, effectively preventing first set voltage-stabilizing constant-source A1 output
Electric current it is too high or too low when, cause LED illumination lamp LEDN electric current excessively high and damage or electric current is too low and can not work normally；
Since the power output end 3 and 4 feet of second set of voltage-stabilizing constant-source A2 and the two normally opened contact ends relay J are respectively through conducting wire
Connection, two control tip sides of relay J are connected through conducting wire respectively with LED illumination lamp LEDN power input both ends, so, relay
Device J be in after two normally opened contact end of electricity condition and two control tip sides are respectively turned on, second set of voltage-stabilizing constant-source
The power output end 3 of A2 and the 3.9V voltage-stabilizing constant-source of 4 feet output can enter LED illumination lamp LEDN power input both ends, in
It is that LED illumination lamp LEDN continues to obtain electroluminescence power supply, guarantees the normal work of LED illumination lamp LEDN, while will not be because of first set
It is abnormal that voltage-stabilizing constant-source A1 exports high current LED illumination lamp LEDN damage, output low current LED illumination lamp LEDN works.
When the electric current of first set voltage-stabilizing constant-source A1 output is too high or too low, one-chip computer module A2 is inside it under circuit function,
While 5 foot out-put supply of control output end enters relay J cathode power supply input terminal, cathode power supply can also enter cue circuit
The resistance R3 other end, then the silicon-controlled VS of cue circuit is triggered, so relay J1 obtain it is electric be attracted its control tip side
It is closed with normally opened contact end, since relay J1 controls 3 foot of power output end of tip side and first set voltage-stabilizing constant-source A2
It is connected, warning lamp H cathode power supply input terminal is connected with relay J1 normally opened contact end, warning lamp H negative power supply input end grounding,
So this moment warning lamp H can obtain electroluminescence give user prompt, in this way main power source occur output electric current it is too high or too low therefore
After barrier, it can be shone by warning lamp H and give the maintenance that user's prompt carries out main power source in time, main power source (first set pressure stabilizing
Constant-current supply A1) safeguard after, after the electric current of the power output end of first set voltage-stabilizing constant-source A1 output is normal, single-chip microcontroller mould
5 foot of the power output end no longer out-put supply of block A2, relay J no longer electric actuation, relay J be in power failure state two
After normally-closed contact end and two control tip sides are again switched on respectively, first set voltage-stabilizing constant-source A1 output power supply again into
Enter LED illumination lamp LEDN, switching first set voltage-stabilizing constant-source is LED illumination lamp LEDN confession to such conversion circuit again automatically
Electricity.The utility model especially can protect application to the LED application product of high value to the power supply protection that LED illumination lamp has played the role of
Effect is more preferable, can effectively reduce the economic loss of user.Based on above-mentioned, so the application prospect that the utility model has had.
In Fig. 3, relay J-type number is the happy 4123/DC5V of pine, tool there are two power input, two normally opened contact ends,
Two normally-closed contact ends, two control tip sides.Relay J1 model is that the happy 4123/DC4V. resistance R3 resistance value of pine is 1K；Resistance
R1, R2 resistance value are 470K；Silicon-controlled is the plastic packaging one-way SCR of model MCR100-1.Warning lamp H is common 4V operating voltage
Incandescent indicator light.First and second set of voltage-stabilizing constant-source A1, A2 brand is bright latitude.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above, for
For those skilled in the art, it is clear that the utility model is limited to the details of above-mentioned exemplary embodiment, and without departing substantially from this reality
In the case where with novel spirit or essential attributes, the utility model can be realized in other specific forms.Therefore, no matter from
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by appended
Claim rather than above description limit, it is intended that the institute that will be fallen within the meaning and scope of the equivalent elements of the claims
It changes and is embraced therein.Right involved in should not treating any reference in the claims as limiting is wanted
It asks.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (3)
1. a kind of LED constant current power supply unit, including two sets of voltage-stabilizing constant-sources, the power output end of first set voltage-stabilizing constant-source
Voltage, the electric current of the power output end 3 and the output of 4 feet of 3 and 4 feet and second set of voltage-stabilizing constant-source are consistent, two sets of pressure-stabilizing constant flows
The power input of power supply is in parallel and connects respectively through conducting wire with 220V AC power source the two poles of the earth, it is characterised in that also has conversion electricity
On circuit boards, circuit board is mounted on member for road, cue circuit, two sets of voltage-stabilizing constant-sources and conversion circuit, cue circuit installation
In part box, the first via power output end of first set voltage-stabilizing constant-source and two signal input parts and first of conversion circuit
Road control tip side is connected through conducting wire respectively, and the two of the second road power output end of first set voltage-stabilizing constant-source and conversion circuit
A power input is connected through conducting wire respectively, the second tunnel control of the power output end and conversion circuit of second set of voltage-stabilizing constant-source
Tip side processed is connected through conducting wire respectively, the control power output end of conversion circuit and the power input both ends difference of LED illumination lamp
It is connected through conducting wire, the cathode power supply output end of conversion circuit is connected with cue circuit signal input part through conducting wire, first set pressure stabilizing
The negative power supply output end of constant-current supply and the negative power supply input terminal of cue circuit are through wired earth.
2. a kind of LED constant current power supply unit according to claim 1, it is characterised in that conversion circuit includes single-chip microcontroller mould
Block, relay and resistance, connect through circuit board wiring therebetween, and one-chip computer module main control chip is STC12C5A60S2, single-chip microcontroller
Two signal input parts 3 of module and 4 feet are connected with two resistance one end respectively, two resistance other ends respectively with two, relay
The connection of normally-closed contact end, the control power output end of one-chip computer module are connected with relay cathode power supply input terminal, single-chip microcontroller mould
2 foot of negative power supply input terminal of block finished product is connected with relay negative power supply input terminal.
3. a kind of LED constant current power supply unit according to claim 1, it is characterised in that cue circuit includes resistance, controllable
Silicon, relay and warning lamp, connect through circuit board wiring therebetween, and resistance one end is connected with SCR control pole, silicon-controlled anode
It is connected with relay control tip side, silicon-controlled cathode is connected with relay cathode power supply input terminal, relay normally open contact end
It is connected with warning lamp cathode power supply input terminal, relay negative power supply input terminal is connected with warning lamp negative power supply input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822113922.XU CN209448941U (en) | 2018-12-17 | 2018-12-17 | A kind of LED constant current power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822113922.XU CN209448941U (en) | 2018-12-17 | 2018-12-17 | A kind of LED constant current power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209448941U true CN209448941U (en) | 2019-09-27 |
Family
ID=68014259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822113922.XU Expired - Fee Related CN209448941U (en) | 2018-12-17 | 2018-12-17 | A kind of LED constant current power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209448941U (en) |
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2018
- 2018-12-17 CN CN201822113922.XU patent/CN209448941U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |