CN208754580U - A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit - Google Patents
A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit Download PDFInfo
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- CN208754580U CN208754580U CN201821222119.3U CN201821222119U CN208754580U CN 208754580 U CN208754580 U CN 208754580U CN 201821222119 U CN201821222119 U CN 201821222119U CN 208754580 U CN208754580 U CN 208754580U
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Abstract
The utility model discloses a kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuits, are related to LED illumination driving circuit, and multi-chip parallel connection LED illumination driving circuit includes power supply unit, LED array, peripheral circuit, linear constant current driving chip；Linear constant current driving chip has current terminal pin, input pin and output pin；The input pin of linear constant current driving chip is sequentially connected the output pin of a linear constant current driving chip, and the input pin of first linear constant current driving chip connects peripheral circuit；The utility model multi-chip parallel connection LED illumination driving circuit only needs a set of various peripheral circuits, simplify structure, save cost, peripheral circuit signal is detected by first linear constant current chip, and signal is sent to the electric current for controlling the power conversion unit synchronously control in all linear constant current chips to all linear constant current chips and flowing through LED array.
Description
Technical field
The utility model relates to LED illumination driving circuit, specially a kind of linear constant current driving chip and multi-chip are in parallel
LED illumination driving circuit.
Background technique
Chip and peripheral circuit would generally be used in linear constant current LED illumination driving circuit.Chip include control circuit and
Current source；Peripheral circuit is varied, it is common such as: current setting circuit, loop compensation circuit, filter circuit, detection circuit
With abnormity protection circuit etc..Currently, in the biggish application of power, multiple chip parallel connections is generally required with extended power and are shared
Power consumption, correspondingly, the corresponding peripheral circuit of multiple groups chip are also required to be used together, this causes peripheral circuit extremely complex.
Fig. 1 is the LED illumination driving circuit of existing 3 chips parallel connection, including power supply unit, LED array, 3 chips,
And 3 peripheral circuits.Each chip includes 1 control circuit and 1 current source, and one end of control circuit connects current source
One end, the other end of control circuit connect input pin MI, and the other end of current source connects current terminal pin MOUT.3 peripheries
Circuit is separately connected the input pin MI of 3 chips, and the current terminal pin MOUT of 3 chips is all connected with the same end of LED array,
The other end of LED array connects power supply unit.
In existing multi-chip parallel connection LED illumination driving circuit, each chip is required to connect corresponding peripheral circuit, makes
Circuit devcie it is more, circuit connection is complicated.
Utility model content
The purpose of this utility model is to provide a kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving electricity
Road, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides the following technical solutions: a kind of linear constant current driving chip, has electricity
Flow end pin, input pin and output pin；The linear constant current driving chip includes power conversion unit, the power supply conversion
Unit flows through the electric current of LED array by current terminal pin control；The input pin is to detect all kinds of external signals
And be allowed to be reacted to the output pin, the state of the output pin is controlled by the input pin.
Further, the linear constant current driving chip further includes input buffer circuit and output buffer；It is described defeated
The output end of buffer circuit connects the output pin out, and the output end of the input buffer circuit connects the output buffering electricity
The input terminal of the input terminal on road, the input buffer circuit connects the input pin；The output end of the current converter circuit
The current terminal pin is connected, input terminal connects the output end of the input buffer circuit.
Further, if the input pin is for receiving current signal, it is equal that the output pin generates numerical value
Current signal.
Further, if the input pin is for receiving voltage signal, it is equal that the output pin generates numerical value
Voltage signal.
Further, if the input pin generates identical logic for receiving logical signal, the output pin
Signal.
The utility model also proposed a kind of multi-chip parallel connection LED illumination driving circuit, including peripheral circuit, power supply list
Member, LED array and the linear constant current driving chip described in several；The peripheral circuit connects one of them described linear perseverance
The input pin of driving chip is flowed, the output pin of the linear constant current driving chip successively drives with next linear constant current
The input pin of dynamic chip is connected, and the output pin of the last one linear constant current driving chip is vacant；The LED array
One end connect power supply unit, the other end is separately connected the current terminal pin of the linear constant current driving chip.
Further, the peripheral circuit is detected by the input pin of first linear constant current driving chip
Peripheral end signal, and signal is given and is controlled to all linear constant current chips in all linear constant current chips
The power conversion unit synchronously control flows through the electric current of the LED array.
Further, the linear constant current driving chip has input pin described at least one；The linear constant current driving
The output pin of chip is successively connected with corresponding input pin on next linear constant current driving chip respectively.
The further peripheral circuit part is all integrated into one or more any described linear constant current driving cores
Inside piece.
Compared with prior art, the utility model has the beneficial effects that the illumination of the utility model multi-chip parallel connection LED is driven
Dynamic circuit only needs a set of various peripheral circuits, reduces costs, simplifies structure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing multi-chip parallel connection LED illumination driving circuit；
Fig. 2 is the structural schematic diagram of the utility model multi-chip parallel connection LED illumination driving circuit embodiment one；
Fig. 3 is the structural schematic diagram of the utility model multi-chip parallel connection LED illumination driving circuit embodiment two.
In appended drawing reference: 1, linear constant current driving chip；2, peripheral circuit；21, control circuit；22, detection circuit；3,
LED array；31, the first LED array；32, the second LED array；4, power supply unit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
As shown in Fig. 2, the present embodiment multi-chip parallel connection LED illumination driving circuit includes peripheral circuit 2, LED array 3, supplies
Electric unit 4 and three linear constant current driving chips 1.
One end of the connection LED array 3 of power supply unit 4.
Peripheral circuit 2 has outer peripheral end 1SEXT, including current source 1IR and resistance 1R.Current source 1IR cathode ground connection, just
One end of pole connection outer peripheral end 1SEXT and resistance 1R.The other end connection LED array 3 of resistance 1R is not connected with power supply unit 4
One end, for detecting the voltage magnitude of power supply unit 4.Current source 1IR and resistance 1R constitutes one by line voltage amplitude
The current reference of influence, the current reference are exported through outer peripheral end 1SEXT, and when alternating current increases, which reduces, when
When alternating current reduces, which increases.
Linear constant current driving chip 1 has an input pin SI, an output pin SO and a current terminal pin IO,
Including input buffer circuit IA, output buffer IB and current converter circuit IC.Input buffer circuit IA, output buffer
IB and current converter circuit IC is current source.The cathode of input buffer circuit IA connects input pin SI；Output buffer
The cathode of IB is grounded, anode connection output pin SO；The cathode of current converter circuit IC is grounded, anode connection current terminal pin
IO.Input buffer circuit IA and output buffer IB constitutes a current mirror；Input buffer circuit IA and electric current conversion electricity
Road IC constitutes another current mirror.If effective input signal of the input pin SI of linear constant current driving chip 1 is drop-down electricity
Stream, the output signal of output pin SO is also pull-down current, and equal with the pull-down current amplitude of input pin SI.
Linear constant current driving chip 1 is arranged successively, the input pin SI of each linear constant current driving chip 1 successively with it is upper
The output pin SO connection of one linear constant current driving chip 1, and the input pin SI of first linear constant current driving chip 1 connects
The outer peripheral end 1SEXT of peripheral circuit 2 is met, the output pin SO of the last one linear constant current driving chip 1 is vacant.Linear constant current drives
The current terminal pin IO of dynamic chip 1 is all connected with one end that LED array 3 is not connected with power supply unit 4.
The working principle of the present embodiment is as follows:
The outer peripheral end 1SEXT of peripheral circuit 2 sets telecommunications in the input pin SI of first linear constant current driving chip 1
Number, on the one hand which generates setting electric current through input buffer circuit IA and current converter circuit IC and drives LED array 3, separately
On the one hand it exports through output buffer IB to output pin SO.The output pin SO of linear constant current driving chip 1 is next
The input pin SI of linear constant current driving chip 1 sets electric signal, and so on, make the electricity of three linear constant current driving chips 1
Stream end pin IO generates setting electric current driving LED array 3.
The present embodiment multi-chip parallel connection LED illumination driving circuit only needs a set of peripheral circuit 2, while reducing costs
Simplify structure.And the linear constant current driving chip in the utility model multi-chip parallel connection LED illumination driving circuit is sequentially connected,
Structure is simply convenient for cabling, and chip exterior circuit connection does not intersect, and improves the stability of circuit.
Embodiment two
As shown in figure 3, the present embodiment multi-chip parallel connection LED illumination driving circuit includes peripheral circuit 2, LED array 3, supplies
Electric unit 4 and three linear constant current driving chips 1.LED array 3 includes the first LED array 31 and the second LED array 32.First
LED array 31 and the second LED array 32 are respectively two kinds of colour temperatures of warm white and cool white.
The output end of power supply unit 4 connects one end of the first LED array 31 and the second LED array 32.
Peripheral circuit 2 has the first outer peripheral end EXTA and the second outer peripheral end EXTB, including a control circuit 21 and one
Detection circuit 22.22 one end of detection circuit connects control circuit 21, and the other end connects power supply unit 4, detects opening for power supply unit
Off status, which is fed to outer peripheral end EXTA and EXTB after control circuit is handled, respectively as the brightness of LEDA and LEDB
Control signal.Two output ends of control circuit are separately connected the first outer peripheral end EXTA and the second outer peripheral end EXTB.
Linear constant current driving chip 1 have the first input pin SIA, the second input pin SIB, the first output pin SOA,
Second output pin SOB, the first current terminal pin IOA and the second current terminal pin IOB, including the first input buffer circuit BIA,
Second input buffer circuit BIB, the first output buffer BOA, the second output buffer BOB, the first current converter circuit
IA and the second current converter circuit IB.First input buffer circuit BIA, the second input buffer circuit BIB, the first output buffering electricity
Road BOA, the second output buffer BOB be voltage follower perhaps the logic follower voltage follower or logic with
The output end of follower can be made to replicate the voltage signal or logical signal of input terminal with device；First input buffer circuit BIA
Input terminal connect the first input pin SIA, output end connect the first output buffer BOA input terminal；Second input is slow
The input terminal for rushing circuit BIB connects the second input pin SIB, and output end connects the input terminal of the second output buffer BOB；The
The output end of one output buffer BOA connects the first output pin SOA；The output end of second output buffer BOB connects
Second output pin SOB.First current converter circuit IA and the second current converter circuit IB is adjustable with control terminal
Constant-current source；Anode the first current terminal pin IOA of connection of first current converter circuit IA, cathode ground connection, control terminal connection first
The output end of input buffer circuit BIA；Anode the second current terminal pin IOB of connection of second current converter circuit IB, cathode connect
Ground, control terminal connect the output end of the second input buffer circuit BIB.
Linear constant current driving chip 1 is arranged successively, and the first input pin SIA of each linear constant current driving chip 1 is successively
Connect with the first output pin SOA of a upper linear constant current driving chip 1, the second input pin SIB successively with a upper line
Second output pin SOB connection of property constant-current driven chip 1；And the first input pin of first linear constant current driving chip 1
First outer peripheral end EXTA of SIA connection peripheral circuit 2, the second outer peripheral end of the second input pin SIB connection peripheral circuit 2
EXTB；The the first output pin SOA and the second output pin SOB of the last one linear constant current driving chip 1 are vacant.Three linear
First current terminal pin IOA of constant-current driven chip 1 is all connected with one end that the first LED array 31 is not connected with power supply unit 4,
Second current terminal pin IOA is all connected with one end that the second LED array 32 is not connected with power supply unit 4.
First input pin SIA of linear constant current driving chip 1, the second input pin SIB received signal are voltage letter
Number or logical signal, keep the first output pin SOA of linear constant current driving chip 1, the second output pin SOB respectively correspondingly defeated
Identical voltage signal or logical signal out.
The working principle of the present embodiment is as follows:
The the first outer peripheral end EXTA and the second outer peripheral end EXTB of peripheral circuit 2 are respectively in first linear constant current driving chip
One group of electric signal is set on 1 the first input pin SIA and the second input pin SIB, the electric signal is slow through the first input respectively
After rushing circuit BIA and the second input buffer circuit BIB, the first current converter circuit IA, the second electric current conversion electricity are on the one hand controlled
Road IB generates one group of setting electric current and drives the first LED array 31 and the second LED array 32, on the other hand respectively through the first output
Buffer circuit BOA and the second output buffer BOB is exported to the first output pin SOA and the second output pin SOB.It is linear permanent
Flow the input of the first output pin SOA and the second output pin SOB in next linear constant current driving chip 2 of driving chip 1
One group of electric signal is set on end SIA, SIB, and so on, make the first current terminal pin IOA of 3 linear constant current driving chips 1
And second current terminal pin IOB generate one group of electric signal and drive the first LED array 31 and the second LED array 32.
The present embodiment multi-chip parallel connection LED illumination driving circuit only needs a set of peripheral circuit 2, can drive first simultaneously
LED array 31 and the second LED array 32, simplify structure while reducing costs.
According to the mentality of designing of different technical staff, the peripheral circuit 2 in the utility model can be some or all of
It is integrated into inside one or more linear constant current driving chip, makes one or more linear constant current driving chip and other lines
Property constant-current driven chip it is different, but realize identical technical effect.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (9)
1. a kind of linear constant current driving chip, it is characterised in that: have current terminal pin, input pin and output pin；It is described
Linear constant current driving chip includes power conversion unit, and the power conversion unit is flowed through by current terminal pin control
The electric current of LED array；The input pin is described defeated to detect all kinds of external signals and be allowed to be reacted to the output pin
The state of pin is controlled by the input pin out.
2. a kind of linear constant current driving chip according to claim 1, it is characterised in that: the linear constant current driving chip
It further include input buffer circuit and output buffer；The output end of the output buffer connects the output pin, institute
The output end for stating input buffer circuit connects the input terminal of the output buffer, and the input terminal of the input buffer circuit connects
Connect the input pin；The output end of the current converter circuit connects the current terminal pin, and input terminal connects the input
The output end of buffer circuit.
3. a kind of linear constant current driving chip according to claim 1, it is characterised in that: if the input pin is for connecing
Current signal is received, then the output pin generates the equal current signal of numerical value.
4. a kind of linear constant current driving chip according to claim 1, it is characterised in that: if the input pin is for connecing
Voltage signal is received, then the output pin generates the equal voltage signal of numerical value.
5. a kind of linear constant current driving chip according to claim 1, it is characterised in that: if the input pin is for connecing
Logical signal is received, then the output pin generates identical logical signal.
6. a kind of multi-chip parallel connection LED illumination driving circuit, it is characterised in that: including peripheral circuit, power supply unit, LED array,
And several linear constant current driving chips as described in claim 1；It is described linear that the peripheral circuit connects one of them
The input pin of constant-current driven chip, the output pin of the linear constant current driving chip successively with next linear constant current
The input pin of driving chip is connected, and the output pin of the last one linear constant current driving chip is vacant；It is LED gusts described
One end of column connects power supply unit, and the other end is separately connected the current terminal pin of the linear constant current driving chip.
7. a kind of multi-chip parallel connection LED illumination driving circuit according to claim 6, it is characterised in that: by first institute
The input pin for stating linear constant current driving chip detects the peripheral end signal of the peripheral circuit, and signal is sent to all
The linear constant current chip, the power conversion unit synchronously control controlled in all linear constant current chips flows through
The electric current of the LED array.
8. a kind of multi-chip parallel connection LED illumination driving circuit according to claim 6, it is characterised in that: the linear perseverance
Flowing driving chip has input pin described at least one；The output pin of the linear constant current driving chip is respectively successively under
Corresponding input pin is connected on one linear constant current driving chip.
9. a kind of multi-chip parallel connection LED illumination driving circuit according to claim 6, it is characterised in that: the periphery electricity
Road is some or all of to be integrated into inside one or more any described linear constant current driving chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821222119.3U CN208754580U (en) | 2018-07-31 | 2018-07-31 | A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821222119.3U CN208754580U (en) | 2018-07-31 | 2018-07-31 | A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit |
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| CN208754580U true CN208754580U (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650755A (en) * | 2018-07-31 | 2018-10-12 | 上海路傲电子科技有限公司 | A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit |
-
2018
- 2018-07-31 CN CN201821222119.3U patent/CN208754580U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650755A (en) * | 2018-07-31 | 2018-10-12 | 上海路傲电子科技有限公司 | A kind of linear constant current driving chip and multi-chip parallel connection LED illumination driving circuit |
| WO2020024892A1 (en) * | 2018-07-31 | 2020-02-06 | 上海路傲电子科技有限公司 | Linear constant-current drive chip, and led illumination drive circuit with multiple chips connected in parallel |
| CN108650755B (en) * | 2018-07-31 | 2020-09-08 | 上海路傲电子科技有限公司 | Linear constant-current driving chip and multi-chip parallel LED lighting driving circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Lingang Financial Leasing Co.,Ltd. Assignor: SHANGHAI LOOALL ELECTRONICS Co.,Ltd. Contract record no.: X2022980015095 Denomination of utility model: A linear constant current drive chip and multi-chip parallel LED lighting drive circuit Granted publication date: 20190416 License type: Exclusive License Record date: 20220913 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A linear constant current drive chip and multi-chip parallel LED lighting drive circuit Effective date of registration: 20220915 Granted publication date: 20190416 Pledgee: Shanghai Lingang Financial Leasing Co.,Ltd. Pledgor: SHANGHAI LOOALL ELECTRONICS Co.,Ltd. Registration number: Y2022980015288 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |