CN206674237U - A kind of high-voltage linear constant current parallel drive LED circuit - Google Patents
A kind of high-voltage linear constant current parallel drive LED circuit Download PDFInfo
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- CN206674237U CN206674237U CN201720210237.1U CN201720210237U CN206674237U CN 206674237 U CN206674237 U CN 206674237U CN 201720210237 U CN201720210237 U CN 201720210237U CN 206674237 U CN206674237 U CN 206674237U
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- bridge rectifier
- rectifier diode
- diode
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Abstract
The utility model discloses a kind of high-voltage linear constant current parallel drive LED circuit, one end of the fuse is connected with fire-wire interfaces, and its other end is connected to the first port of bridge rectifier diode, one end of adjustable resistance is connected to the common port of fuse and bridge rectifier diode, and its other end is connected to the common port of zero line interface and the port of bridge rectifier diode the 3rd；A plurality of light emitting diodes are sequentially connected in series two-by-two and after being unified into diode group, two control chips are simultaneously unified into chipset, the second port of bridge rectifier diode is connected to one end of chipset after being sequentially connected in series successively with a plurality of diode groups, the other end of chipset and the 4th port of bridge rectifier diode connect, and the common end grounding of the two；After fixed resistance and electric capacity parallel connection, the common port of the two is connected to the common port of bridge rectifier diode second port and a plurality of light emitting diodes, and another common end grounding of the two.The circuital current is stable, and the voltage scope of application is wide and safe.
Description
Technical field
The utility model belongs to constant-current circuit technical field, more particularly to a kind of high-voltage linear constant current parallel drive LED electricity
Road.
Background technology
LED is diode element, has a basic resistance when energization, but due to its diode effect, be powered
LED can inherently generate heat afterwards；It is exactly and the more electric energy into light by the fraction energy conversion by electronics that LED is luminous
Consume in the form of heat, when heat is bigger, LED self-resistances will side it is small, resistance diminishes, and electric current will increase lasting increasing
Greatly, it is exactly that LED itself burns incrementally to go down, and the principle of constant current is provided in the electric current being applied in the range of certain voltage on LED
All the time in a manner of relative constancy by, even if so the change of LED itself resistances nor affects on the electric current passed through, so as to
LED normal work is ensure that, while the energy loss that electric current increase is brought can be reduced.
Especially under hyperbaric environment, voltage change more by a small margin can influence curent change larger in LED, and it should
It is indifferent to the power grid environment that fluctuates and have noise.Existing high-voltage constant-current circuit is complex, and is not easy to be applied to respectively
Kind is different mechanically.
The content of the invention
To solve the above problems, the purpose of this utility model is to provide a kind of high-voltage linear constant current parallel drive LED electricity
Road, the circuit can ensure LED, and its operating current is stable at work, and not worked long hours in itself by LED is influenceed, and not
Influenceed by voltage pulsation.
Another purpose of the present utility model is to provide a kind of high-voltage linear constant current parallel drive LED circuit, the circuit
It can be applied to convenient on various devices.
To achieve the above object, the technical solution of the utility model is as follows.
A kind of high-voltage linear constant current parallel drive LED circuit, the circuit include fuse, adjustable resistance, bridge rectifier
Diode, a plurality of light emitting diodes, fixed resistance, electric capacity and two control chips, one end and the live wire of the fuse connect
Mouth connection, and its other end is connected to the first port of bridge rectifier diode, one end of the adjustable resistance is connected to insurance
The common port of silk and bridge rectifier diode, and its other end is connected to zero line interface and the port of bridge rectifier diode the 3rd
Common port；A plurality of light emitting diodes are sequentially connected in series two-by-two and after being unified into diode group, and described two control chips are in parallel
Into chipset, the second port of the bridge rectifier diode is connected to chip after being sequentially connected in series successively with a plurality of diode groups
One end of group, the other end of the chipset and the 4th port of bridge rectifier diode connect, and the common end grounding of the two；
After fixed resistance and the electric capacity parallel connection, the common port of the two is connected to bridge rectifier diode second port and a plurality of hairs
The common port of optical diode, and another common end grounding of the two.
The electric capacity is polarized electric capacity, and bridge is connected to after the positive pole of the electric capacity and one end composition common port of fixed resistance
The common port of formula commutation diode second port and a plurality of light emitting diodes, and the negative pole of the electric capacity and fixed resistance is another
It is grounded after the composition common port of end.On the one hand the electric capacity of polarized can ensure that its capacitance is larger, have in use compared with
Strong charge storage ability；On the other hand, it can ensure that the course of discharge in electric discharge is bridge rectifier diode and light-emitting diodes
The common port of pipe, the electric current opposite with the outflow of control chip electric current will not be discharged, realize the same of the function of its electric capacity in itself
When be able to maintain that the overall stability of circuit.
The model MG2820 of the control chip.
The operating voltage of the control chip is 7-500V, and its outputting current steadily is 20mA.
The high-voltage linear constant current parallel drive LED circuit that the utility model is realized, it is ensured that a plurality of LEDs exist
Its electric current is constant during work, reduces energy loss during LED long-term work；In addition, it can be big into the voltage range born,
Go for the device of the overwhelming majority, expand the scope of its application；Fuse on live wire being capable of protection circuit well
Overall security, prevents fortuitous event from making all parts damages in circuit；Multiple light emitting diodes are in parallel two-by-two
Into diode group, and two control chips and chipset is unified into, the use range of circuit can be expanded, meet more high current and more
The demand of more light emitting diodes.
Brief description of the drawings
Fig. 1 is the circuit diagram that the utility model is implemented.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
High-voltage linear constant current parallel drive LED circuit shown in Figure 1, being realized by the utility model, the circuit bag
Fuse F1, adjustable resistance VAR, bridge rectifier diode D1, a plurality of light emitting diode D2, fixed resistance R1, electric capacity are included
C1 and control chip, one end of the fuse F1 is connected with fire-wire interfaces, and its other end is connected to bridge rectifier diode
D1 first port, one end of the adjustable resistance VAR are connected to fuse F1 and bridge rectifier diode D1 common port,
And its other end is connected to the common port of zero line interface and the ports of bridge rectifier diode D1 the 3rd, the bridge rectifier diode
D1 second port is connected to one end of control chip, the control core after being sequentially connected in series successively with a plurality of light emitting diode D2
The other end of piece is connected with bridge rectifier diode D1 the 4th port, and the common end grounding of the two；The fixed resistance R1
After electric capacity C1 parallel connections, the common port of the two is connected to bridge rectifier diode D1 second ports and a plurality of light emitting diodes
D2 common port, and another common end grounding of the two.
Electric capacity C1 is polarized electric capacity C1, and electric capacity C1 positive pole after fixed resistance R1 one end composition common port with being connected
To bridge rectifier diode D1 second ports and a plurality of light emitting diode D2 common port, and electric capacity C1 negative pole and fixation
It is grounded after resistance R1 other end composition common port.Polarized electric capacity C1 can ensure electric capacity C1 its sense of current in electric discharge
It is stable, the electric current opposite with control chip output current will not be produced, the overall stability of circuit can be ensured.
The model MG2820 of control chip.MG2820 can be used as current source or current sink to use, and internal
Intelligent temperature regulation chip is provided with, when the junction temperature of chip is more than about 110 degrees Celsius, the output current of chip can be from nominal value
Reduce.If junction temperature persistently rises to 150-160 degrees centigrades, the output current of secondary chip can be down to extremely low.Electric current drops
Low, the power consumption on chip can be reduced, and junction temperature can decline.When junction temperature descends below 110 degrees Celsius, the output current of chip is excellent
Favour recovers all normal values automatically.It is secondary can only regulatory function allow LED drive chip continuous firing at relatively high temperatures, avoid chip mistake
Cause thermal damage enters overheat protector positive closing state.
The operating voltage of control chip is 7-500V, and its outputting current steadily is 20mA.Operating voltage is 7-500V energy
The circuit using the overwhelming majority is enough enabled the circuitry to, outputting current steadily is that 20mA can ensure the feelings of LED normal work
Power consumption is reduced as far as under condition, reaches the effect of an energy-saving and emission-reduction,
The high-voltage linear constant current parallel drive LED circuit that the utility model is realized, it is ensured that a plurality of LEDs exist
Its electric current is constant during work, reduces energy loss during LED long-term work；In addition, it can be big into the voltage range born,
Go for the device of the overwhelming majority, expand the scope of its application；Fuse F1 on live wire can protect electricity well
The overall security in road, prevents fortuitous event from making all parts damages in circuit；Multiple light emitting diodes are two-by-two simultaneously
Be unified into diode group, and two control chips and be unified into chipset, the use range of circuit can be expanded, meet more high current and
The demand of more light emitting diodes.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of high-voltage linear constant current parallel drive LED circuit, the circuit include fuse, adjustable resistance, bridge rectifier two
Pole pipe, a plurality of light emitting diodes, fixed resistance, electric capacity and two control chips, one end of the fuse and fire-wire interfaces
Connection, and its other end is connected to the first port of bridge rectifier diode, one end of the adjustable resistance is connected to fuse
With the common port of bridge rectifier diode, and its other end is connected to the public affairs of zero line interface and the port of bridge rectifier diode the 3rd
End altogether；A plurality of light emitting diodes are sequentially connected in series two-by-two and after being unified into diode group, and described two control chips are simultaneously unified into
Chipset, the second port of the bridge rectifier diode are connected to chipset after being sequentially connected in series successively with a plurality of diode groups
One end, the 4th port of the other end of the chipset and bridge rectifier diode connects, and the common end grounding of the two；Institute
After stating fixed resistance and electric capacity parallel connection, the common port of the two is connected to bridge rectifier diode second port and lighted with a plurality of
The common port of diode, and another common end grounding of the two.
2. high-voltage linear constant current parallel drive LED circuit as claimed in claim 1, it is characterised in that the electric capacity is polarized
Bridge rectifier diode second port is connected to answering after electric capacity, the positive pole of the electric capacity and one end composition common port of fixed resistance
The common port of several light emitting diodes, and be grounded after the other end of the negative pole of the electric capacity and fixed resistance composition common port.
3. high-voltage linear constant current parallel drive LED circuit as claimed in claim 1, it is characterised in that the control chip is
MG2820。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720210237.1U CN206674237U (en) | 2017-03-06 | 2017-03-06 | A kind of high-voltage linear constant current parallel drive LED circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720210237.1U CN206674237U (en) | 2017-03-06 | 2017-03-06 | A kind of high-voltage linear constant current parallel drive LED circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206674237U true CN206674237U (en) | 2017-11-24 |
Family
ID=60376054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720210237.1U Expired - Fee Related CN206674237U (en) | 2017-03-06 | 2017-03-06 | A kind of high-voltage linear constant current parallel drive LED circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206674237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935874A (en) * | 2018-04-20 | 2020-11-13 | 上海路傲电子科技有限公司 | Linear constant-current driving chip and multi-chip parallel LED lighting circuit |
-
2017
- 2017-03-06 CN CN201720210237.1U patent/CN206674237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935874A (en) * | 2018-04-20 | 2020-11-13 | 上海路傲电子科技有限公司 | Linear constant-current driving chip and multi-chip parallel LED lighting circuit |
| CN111935874B (en) * | 2018-04-20 | 2023-09-05 | 上海路傲电子科技有限公司 | Linear constant current driving chip and multi-chip parallel LED lighting circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 |