CN106211491A - A kind of LED illumination circuit and lighting - Google Patents
A kind of LED illumination circuit and lighting Download PDFInfo
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- CN106211491A CN106211491A CN201510213883.9A CN201510213883A CN106211491A CN 106211491 A CN106211491 A CN 106211491A CN 201510213883 A CN201510213883 A CN 201510213883A CN 106211491 A CN106211491 A CN 106211491A
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Abstract
The embodiment of the invention discloses a kind of LED illumination circuit, including: half-wave rectifying circuit, current control circuit, LED chip is directly driven in the first exchange, LED chip, the first resistance, the second resistance are directly driven in the second exchange.The embodiment of the invention also discloses a kind of lighting.Use the present invention, reduce the volume of lighting circuit, lower cost, prolongation life-span.
Description
Technical field
The present invention relates to field of LED illumination, particularly relate to a kind of LED illumination circuit and lighting.
Background technology
LED (Light-Emitting Diode, light emitting diode) light source be exactly light emitting diode be luminous body
Light source, has that efficiency is high and the advantage of life-span length, be widely used in office, classroom, market, subway,
The public places such as tunnel, LED light source is the main product of illumination of future generation.
In current LED illumination lamp, separate AC-DC Switching Power Supply constant current drive mode is used to drive
Dynamic LED module, but this type of drive there is the problem that Switching Power Supply structure is complicated, volume is big,
Thus cause cost the highest.Simultaneous Switching power supply needs use multiple electrochemical capacitor, the life-span of electrochemical capacitor
Short, so that the life-span of Switching Power Supply is less than the life-span of the LED module in lighting, thus cause whole
The life-span of lighting circuit is the longest.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, it is provided that a kind of LED illumination circuit and illuminating lamp
Tool.The problem that in prior art, the volume of LED illumination circuit is big, cost is high and the life-span is short can be solved.
In order to solve above-mentioned technical problem, embodiments provide a kind of LED illumination circuit, including:
Half-wave rectifying circuit, current control circuit, first exchange directly drive LED chip, second exchange directly drive LED
Chip, the first resistance, the second resistance, a LED module and the 2nd LED module, wherein,
Described half-wave rectifying circuit is used for electric main is converted to half-wave voltage, described half-wave rectifying circuit
First input pin is connected with the zero line of described electric main, the second input pin of described half-wave rectifying circuit
It is connected with the live wire of described electric main；The positive output pin of described half-wave rectifying circuit is respectively with described first
Exchange is directly driven the voltage input pin of LED chip and is connected and described 2nd LED directly drives the electricity of LED chip
Pressure input pin is connected and is connected with one end of described first resistance, the negative output of described half-wave rectifying circuit
Pin ground connection；
Described first exchange is directly driven LED chip and is exchanged with second and directly drive LED chip for respectively at respective electricity
Paths pin exports for a described LED module and the operating current of described 2nd LED module；
The other end of described first resistance is exchanged with described first by described second resistance eutral grounding respectively and directly drives
The voltage compensation pin of LED chip and exchange the voltage compensation pin phase directly driving LED chip with described second
Even；
A described LED module is connected across described first exchange and directly drives voltage input pin and the electricity of LED chip
Between circulation road pin；
Described 2nd LED module is connected across described second exchange and directly drives voltage input pin and the electricity of LED chip
Between circulation road pin；
Described current control circuit is for generating the electric current of multiple current value and described electric current is defeated by first
Go out pin to export described first exchange and directly drive the electric current regulation pin of LED chip and by the second output pin
Export described second exchange and directly drive the electric current regulation pin of LED chip.
Correspondingly, the embodiment of the present invention additionally provides a kind of lighting, including above-mentioned LED illumination circuit
Implement the embodiment of the present invention, have the advantages that
Constant-current source chip drives LED module will be directly passed through, it is not necessary to external bulky after electric main rectification
The Switching Power Supply as constant current source driving circuit, greatly simplify the structure of LED illumination circuit, decrease
The quantity that components and parts use, thus reduce cost.Avoid the electrochemical capacitor that service life is short simultaneously, thus carry
The high service life of LED illumination circuit.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of a kind of LED illumination circuit that first embodiment of the invention provides；
Fig. 2 is the circuit diagram of a kind of LED illumination circuit that second embodiment of the invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Seeing Fig. 1, the circuit diagram of a kind of LED illumination circuit provided for first embodiment of the invention, at this
In inventive embodiments, described LED illumination circuit includes: half-wave rectifying circuit 10, current control circuit 11,
LED chip U1 is directly driven in first exchange, LED chip U2, the first resistance are directly driven in the second exchange
R26, the second resistance R25, LED module 12 and a 2nd LED module 13, directly drive with the first exchange
LED chip U1 and the second exchange are directly driven as a example by LED chip U2 is respectively provided with 4 current channel pins,
A corresponding LED module and the 2nd LED module comprise 4 LED groups, particularly as follows: a described LED
Module includes a LED group, the 2nd LED group, the 3rd LED group and the 4th LED group, described second
LED module includes the 5th LED group, the 6th LED group, the 7th LED group and the 8th LED group.Permissible
Being understood by, for different chip models, the total of the current channel pin of LED chip is directly driven in two exchanges
Quantity differs, and the quantity chosen time specifically used is not restricted, for example, it is possible to select therein
One or more current channel pins.Situation about all being used with regard to 4 passage pins below, describes it even
Connect relation:
Half-wave rectifying circuit 10 for electric main being converted to half-wave voltage, the of half-wave rectifying circuit 10
One input pin 1 is connected with the zero line of electric main, the second input pin 2 of half-wave rectifying circuit 10 and institute
The live wire stating electric main is connected；The positive output pin of half-wave rectifying circuit 10+exchange with first respectively and directly drive
The voltage input pin VAC of LED chip U1 is connected and the 2nd LED directly drives the electricity of LED chip U2
Pressure input pin VAC is connected and is connected with one end of the first resistance R26, bearing of half-wave rectifying circuit 10
Output pin ground connection；
The other end of the first resistance R26 is exchanged with first by the second resistance R25 ground connection respectively and directly drives LED
The voltage compensation pin VCOMP of chip U1 and exchanging with second directly drives the voltage of LED chip U2 and mends
Repay pin VCOMP to be connected；
A described LED group is connected across the first exchange and directly drives the voltage input pin VAC of LED chip U1
With first between current channel pin CH1, described 2nd LED group is connected across the first exchange and directly drives LED core
Between the first current channel pin CH1 and the second current channel pin CH2 of sheet U1, described 3rd LED
Group is connected across the first exchange and directly drives the second current channel pin CH2 and the 3rd current channel of LED chip U1
Between pin CH3, described 4th LED group is connected across the first exchange and directly drives the 3rd electricity of LED chip U1
Between circulation road pin CH3 and the 4th current channel pin CH4；Wherein, an each LED of LED module
Group includes that the LED at least one in parallel, series connection or the LED of series-parallel connection, and each LED group is common anode
Pole connects.
Described 5th LED group is connected across the second exchange and directly drives the voltage input pin VAC of LED chip U2
With first between current channel pin CH1, described 6th LED group is connected across the second exchange and directly drives LED core
Between the first current channel pin CH1 and the second current channel pin CH2 of sheet U2, described 7th LED
Group is connected across the second exchange and directly drives the second current channel pin CH2 and the 3rd current channel of LED chip U2
Between pin CH3, described 8th LED group is connected across the second exchange and directly drives the 3rd electricity of LED chip U2
Between circulation road pin CH3 and the 4th current channel pin CH4；Wherein, the 2nd each LED of LED module
Group includes that the LED at least one in parallel, series connection or the LED of series-parallel connection, and each LED group is common anode
Pole connects.
Described first exchange is directly driven LED chip and is exchanged with described second and directly drive all non-functional of LED chip and draw
Foot ground connection, the first exchange directly drive LED chip exchange with second directly drive the 6th of LED chip the, 7,11,16,
18 and No. 20 pins are non-functional pin, and in embodiments of the present invention, above-mentioned pin is required to ground connection.
Current control circuit 11 is for generating the electric current of multiple current value, and described electric current is passed through described first
Output pin 1 is exported to the first exchange and directly drives LED chip U1, exported to second by the second output pin 2
LED chip is directly driven in exchange.
The operation principle of the LED illumination circuit in the embodiment of the present invention is: 220V civil power passed through live wire L
It is carried on the first input pin and second input pin of half-wave rectifying circuit 11 with zero line N, the frequency of civil power
Rate is 50Hz, and civil power is converted into the half-wave voltage that frequency is 100Hz, half-wave electricity by half-wave rectifying circuit 11
Pressure be respectively divided into two-way, be loaded into simultaneously the first exchange directly drive LED chip voltage input pin VAC and
The voltage input pin VAC of LED chip is directly driven in second exchange, and directly driving LED chip for two exchanges provides
Running voltage, another road of half-wave voltage, after the dividing potential drop of the first resistance R26 and the second resistance R25, loads
Directly drive LED chip U1 to the first exchange and the voltage compensation pin of LED chip U2 is directly driven in the second exchange
On VCOMP, it is that two exchanges are directly driven reference voltage V ref within LED chip and compensated process.LED
Module is divided into 4 LED groups, is respectively exchange and directly drives 4 current channel pins connections of LED chip.Electricity
The electric current of flow control circuit output is for controlling the ON time of the LED module of correspondence, the size of ON time
Depend on the size of the current value that current control circuit 11 inputs.The electric current of LED group in first module 12
Size depends on the resistance of the 3rd resistance R27, and computing formula is:
ICH1=0.4Vref/R27；ICH1 is the electric current of a LED group
ICH2=0.8Vref/R27；ICH2 is the electric current of the 2nd LED group
ICH3=1.0Vref/R27；LCH3 is the electric current of the 3rd LED group
ICH4=1.2Vref/R27；ICH4 is the electric current of the 4th LED group.
In like manner, in the second module, the size of each LED group depends on the resistance of the 4th resistance R28, calculates public affairs
Formula is identical with above-mentioned, and here is omitted.
Implement the embodiment of the present invention, drive directly directly driving LED chip by exchange after electric main rectification
LED module, it is not necessary to the external bulky Switching Power Supply as constant current source driving circuit, greatly simplify
The structure of LED illumination circuit, decreases the quantity that components and parts use, thus reduces cost.Avoid making simultaneously
With the electrochemical capacitor that the life-span is short, thus improve the service life of LED illumination circuit.
Seeing Fig. 2, the circuit diagram of a kind of LED illumination circuit provided for second embodiment of the invention, at this
In inventive embodiments, described LED illumination circuit except include half-wave rectifying circuit 10, current control circuit 11,
LED chip U1 is directly driven in first exchange, LED chip U2, the first resistance are directly driven in the second exchange
R26, the second resistance R25, LED module 12 and a 2nd LED module 13, a described LED mould
Group includes a LED group, the 2nd LED group, the 3rd LED group and the 4th LED group, described 2nd LED
Module includes outside the 5th LED group, the 6th LED group, the 7th LED group and the 8th LED group, wherein,
First exchange directly drive LED chip U1 and the second exchange directly to drive the model of LED chip U2 be SW5905,
Or the chip compatible with SW5905.
Optionally, LED illumination circuit also includes: the 3rd resistance R27, the 4th resistance R28, the first electric capacity
C12, the second electric capacity C9, the 3rd electric capacity C13, the 4th electric capacity C8, the 5th electric capacity C14, the 6th electric capacity C10,
7th electric capacity C15；Wherein, the first exchange directly drives the peak detection pin PDC of LED chip U1 by the
One electric capacity C12 ground connection, the first exchange is directly driven the channel current of LED chip U1 and is arranged pin RISET and pass through
3rd resistance R27 ground connection, the first exchange is directly driven the internal regulated voltage pin VDD of LED chip U1 and is led to
Crossing the second electric capacity C9 ground connection, the enable pin DIMEN ground connection of LED chip U1 is directly driven in the first exchange, the
The analogue ground pin GNDA ground connection of LED chip U1 is directly driven in one exchange, and LED core is directly driven in the first exchange
The channel delay pin CDLY of sheet U1 passes through the 3rd electric capacity C13 ground connection, and LED chip is directly driven in the first exchange
Predrive regulation voltage pin VCC of U1 directly drives LED core by the 4th electric capacity C8 ground connection, the first exchange
The electric current regulation pin ADIM/PWM of sheet U1 is connected with the first output pin 1 of current control circuit 11；
Second exchange is directly driven the peak detection pin PDC of LED chip U2 and is passed through the 5th electric capacity C14 ground connection,
Second exchange is directly driven the channel current of LED chip U2 and is arranged pin RISET by the 4th resistance R28 ground connection,
Second exchange is directly driven the internal regulated voltage pin VDD of LED chip U2 and is passed through the 6th electric capacity C10 ground connection,
The enable pin DIMEN ground connection of LED chip U2 is directly driven in second exchange, and LED chip is directly driven in the second exchange
The analogue ground pin GNDA ground connection of U2, the channel delay pin of LED chip U2 is directly driven in the second exchange
CDLY passes through the 7th electric capacity C15 ground connection, and the predrive regulation voltage of LED chip U2 is directly driven in the second exchange
Pin VCC and first exchange is directly driven predrive regulation voltage pin VCC of LED chip U1 and is connected, the
The of electric current regulation pin ADIM/PWM and the current control circuit 11 of LED chip U2 is directly driven in two exchanges
Two output pins 2 are connected.
Optionally, half-wave rectifying circuit 11 includes electric fuse F2, varistor TNR2 and rectifier bridge DB2,
The wherein positive input pin of rectifier bridge DB2+be connected by the zero line of electric fuse F2 with described electric main, whole
The negative input pin of stream bridge DB2-be connected with the live wire of described electric main, the negative output of rectifier bridge DB2 is drawn
Foot-ground connection, the positive output pin of rectifier bridge DB2+exchange the voltage directly driving LED chip U1 respectively with first
The voltage input pin VAC that input pin VAC is connected, directly drive LED chip U2 with the 2nd LED is connected
And be connected with one end of the first resistance R26, varistor TNR2 is connected across the positive input of rectifier bridge DB2
Pin+and negative input pin-between.
Optionally, also include: the 8th electric capacity C11 and the 9th electric capacity C6, wherein, the 8th electric capacity C11 and
Two resistance R25 are in parallel, and described 9th electric capacity is in parallel with described 4th electric capacity C8.
Optionally, current control circuit 11 includes: two-channel digital controls analog switch U3, DC source
V1, level control circuit, wherein,
Two-channel digital controls digital signal grounding pin VEE and the analogue ground pin of analog switch U3
The equal ground connection of VSS, two-channel digital control analog switch U3 forbids that pin INH is unsettled, two-channel digital
Power pins VCC controlling analog switch U3 meets DC source V1；
It is described electric current control that described two-channel digital controls the X passage output pin XOUT of analog switch U3
First output pin of circuit 11 processed, LED is directly driven in described X passage output pin XOUT and first exchange
The electric current regulation pin ADIM/PWM of chip U1 is connected, and described two-channel digital controls analog switch U3
The second output pin that Y passage output pin YOUT is described current control circuit 11, described Y lead to
The electric current regulation pin ADIM/PWM of LED chip U2 is directly driven in road output pin YOUT and second exchange
It is connected；
Address pin A and the B of two-channel digital control analog switch U3 connect described Automatic level control electricity respectively
The output pin on road, described level control circuit is for exporting high level or low level on output pin；
X passage input pin and the Y passage input pin of described two-channel digital control analog switch lead to respectively
Cross resistance to be connected with described DC source.Wherein, it is CD4052 that two-channel digital controls the model of analog switch,
Or and the chip that CD4052 is compatible.
Optionally, X passage input pin and the input of Y passage of described two-channel digital control analog switch is drawn
Foot is respectively provided with 4 input pins, each input pin each with by resistance and described DC source V1 phase
Even, concrete annexation is:
Two-channel digital controls X passage the first input pin X0 of analog switch by the 5th resistance R2 with straight
Stream power supply V1 is connected, and X passage the second input pin X2 passes through the 6th resistance R15 and DC source V1 phase
Even, X passage the 3rd input pin X2 is connected by the 7th resistance R16 and DC source V1, X passage the
Four input pin X3 are connected with DC source V1 by the 8th resistance R17；Two-channel digital controls simulation and opens
Y passage the first input pin Y0 closing U3 is connected with DC source V1 by the 9th resistance R20, and Y leads to
Road the second input pin Y1 is connected with DC source V1 by the tenth resistance R21, and Y passage the 3rd input is drawn
Foot Y2 is connected with DC source V1 by the 11st resistance R19, and Y passage the 4th input pin Y3 passes through
12nd resistance R18 is connected with DC source V1；
Optionally, described lighting circuit also includes: the 13rd resistance R29 and the 14th resistance R30, wherein,
One end of 13rd resistance R9 connects described X passage output pin, another termination of the 13rd resistance R29
Ground；One end of 14th resistance R30 connects described Y passage output pin, another of the 14th resistance R30
End ground connection.
Optionally, a LED module 12 include a LED D1, the 2nd LED D2, the 3rd LED D13,
4th LED D4, the 13rd LED D13, the 14th LED D14, the 15th LED D15, the 16th
LED D16, the 17th LED D17, the 18th LED D18, the 20th LED D20, the 21st LED
D21, the first Zener diode D19, the second Zener diode D22, the 15th resistance R31, the 16th electricity
Resistance R32, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q3, wherein,
The anode of the oneth LED D1 connects the first exchange and directly drives the voltage input pin VAC of LED chip U1,
The negative electrode of the oneth LED D1 connects the first exchange and directly drives the first current channel pin CH1 of LED chip U1,
A 13rd LED D13 and described 14th LED D14 and LED D1 is in parallel；
The anode of the 2nd LED D2 connects the first exchange and directly drives the first current channel pin of LED chip U1
Negative electrode connection first exchange of CH1, the 2nd LED D2 is directly driven the second current channel of LED chip U1 and is drawn
Foot CH2, the first exchange directly drives the second current channel pin Ch2 of LED chip U1 by the 15th resistance
The negative electrode of R31 and the first Zener diode D19 connects and is connected with the grid of the first metal-oxide-semiconductor Q1, first
The plus earth of Zener diode D19, the 15th LED D15, described 16th LED D16 and second
LED D2 is in parallel；
The anode of the 3rd LED D3 connects the first exchange and directly drives the second current channel pin of LED chip U1
CH2, the negative electrode of the 3rd LED D3 connects the drain electrode of the first metal-oxide-semiconductor Q1, by the 16th resistance R32
It is connected with the negative electrode of the second zener diode Q3, by the 16th resistance R32's and the second metal-oxide-semiconductor Q3
Grid connects, and the first exchange is directly driven the 3rd current channel pin CH3 of LED chip and connected the first metal-oxide-semiconductor
The source electrode of Q1, the 17th LED D17, the 18th LED D18 and the 3rd LED D3 are in parallel；
The anode of the 4th LED D4 connects the negative electrode of the 3rd LED D3, and the anode of the 4th LED D4 connects the
The drain electrode of two metal-oxide-semiconductor Q3, the 4th current channel pin CH4 of LED chip U1 is directly driven in the first exchange
Connect the source electrode of the second metal-oxide-semiconductor Q3；
Optionally, the 2nd LED module include the 5th LED D5, the 7th LED D7, the 9th LED D9,
11st LED D11, the 6th LED D6, the 23rd LED D23, the 8th LED D8, the 24th
LED D24, the tenth LED D10, the 25th LED D25, the 12nd LED D12, the 27th LED
D27, the 3rd Zener diode D26, the 4th Zener diode D28, the 17th resistance R33, the 18th electricity
Resistance R34, the 3rd metal-oxide-semiconductor Q2 and the 4th metal-oxide-semiconductor Q4, wherein,
The anode of described 5th LED connects described second exchange and directly drives the voltage input pin of LED chip, institute
The first current channel pin of LED chip is directly driven in described second exchange of negative electrode connection stating the 5th LED, described
6th LED and described 23rd LED is in parallel with described 5th LED；
The first current channel that LED chip is directly driven in described second exchange of anode connection of described 7th LED draws
Foot, the negative electrode of described 7th LED connects described second exchange and directly drives the second current channel pin of LED chip,
Described second exchange directly drives the second current channel pin of LED chip by described 17th resistance and described the
The negative electrode of three Zener diodes connects and is connected with the grid of described 3rd metal-oxide-semiconductor, described 3rd voltage stabilizing two pole
The plus earth of pipe, described 8th LED, described 24th LED are in parallel with described 7th LED；
The second current channel that LED chip is directly driven in described second exchange of anode connection of described 9th LED draws
Foot, the negative electrode of described 9th LED connects the drain electrode of described 3rd metal-oxide-semiconductor, by described 18th resistance
It is connected with the negative electrode of described 4th Zener diode, by described 18th resistance and described 4th metal-oxide-semiconductor
Grid connects, and the 3rd current channel pin that LED chip is directly driven in described first exchange connects described 3rd MOS
The source electrode of pipe, described tenth LED, described 25th LED are in parallel with described 9th LED；
The anode of described 11st LED connects the negative electrode of described 9th LED, the sun of described 11st LED
Pole connects the drain electrode of described 4th metal-oxide-semiconductor, and the 4th current channel of LED chip is directly driven in described second exchange
Pin connects the source electrode of described 4th metal-oxide-semiconductor.
According to the circuit diagram of Fig. 2, the lighting circuit of the embodiment of the present invention includes that two groups of duplicate exchanges are straight
Driving LED chip and LED module, the operation principle of foregoing circuit is identical, directly drives with the first exchange below
LED chip and a LED module carry out illustrating the operation principle of the embodiment of the present invention:
Electric main obtains half after electric fuse F2 and varistor TNR2 after rectifier bridge DB2 rectification
Wave voltage, half-wave voltage one tunnel exchanges to first after the divider filter of R25, R26, C11 and directly drives LED
The voltage compensation pin VCOMP of chip, level pressure compensation pin VCOMP is for monitoring the voltage of half-wave voltage
Value.Another road output valve of half-wave voltage is connected to the voltage output pin VAC of U1, through chip internal voltage stabilizing
Running voltage is provided to U1 after process.Oneth LED module is divided into 4 groups of LED, respectively with the first of U1
Current channel pin CH1, the second current channel pin CH2, the 3rd current channel pin CH3 and the 4th electricity
Circulation road pin CH4 connects.Wherein, if the operating current of a LED module just must more than current threshold
External metal-oxide-semiconductor must be used, if operating circuit the most directly uses built-in metal-oxide-semiconductor less than current threshold.
Current control circuit 11 exports the electric current of the electric current regulation pin ADIM/PWM to U1 for controlling
The ON time of corresponding LED group, thus realize regulating the operating current of LED group, such as CH2 is through electricity
Resistance R31 controls the G pole of Q1, thus controls the operating current of the 3rd LED group.CH1、CH2、CH3、
The source of the PWM duty cycle modulated signal of CH4 is exactly the voltage sampling value of R27 port, when R27 resistance
Setting the lowest, the operating current of 4 LED groups is the biggest, and specific formula for calculation is:
ICH1=0.4V (Vref)/R27；
ICH2=0.8V (Vref)/R27；
ICH3=1.0V (Vref)/R27；
ICH4=1.2V (Vref)/R27；
Owing to Vref and R27 in formula is steady state value, the work of the LED group in a LED module
Electric current can have preferable constant current effect.
A, B control end can form the switching simultaneously controlling the internal two groups of switches of U3, by A/B low and high level
Realize 00,01,10,11 4 kind of combination, such U3CD4052 achieves that R29 and R2/R15/R16/R17
The 4 groups of partial pressure value formed export the ADIM/PWM to U1 from the XOUT of U3；Equally, another group
The 4 groups of partial pressure value formed by R30 and R20/R21/R19/R18 export to U2's from the YOUT of U3
ADIM/PWM.So achieve that brightness adjustment control to U2, U3 simultaneously by A, B control signal,
If the resistance value difference of 2 groups also can realize the light modulation differentiation of U1 and U2, such as, pass through differentiation
Value, R29 with R2/R15/R16/R17, R30 with R20/R21/R19/R18 partial pressure value are different, can make U3
YOUT with the XOUT different magnitude of voltage of output, so that it may realize 2 LED modules and obtain different merits
Rate.
Implement the embodiment of the present invention, will directly pass through constant-current source chip drives LED module after electric main rectification,
Without the external bulky Switching Power Supply as constant current source driving circuit, greatly simplify LED illumination electricity
The structure on road, decreases the quantity that components and parts use, thus reduces cost.Avoid service life short simultaneously
Electrochemical capacitor, thus improve the service life of LED illumination circuit.
The embodiment of the present invention additionally provides a kind of lighting, including the LED illumination described in above-mentioned any one
Circuit is formed integrally with aluminium base, so can reach good radiating effect.LED in the embodiment of the present invention
Lighting includes: emergence lighting lamp, indoor illumination light fitting, outdoor illuminating lamp, police lighting
Or coalmine illumination light fixture etc..
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating
In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
Above disclosed only one preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, one of ordinary skill in the art will appreciate that all or part of stream realizing above-described embodiment
Journey, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that invention is contained.
Claims (9)
1. a LED illumination circuit, it is characterised in that including: half-wave rectifying circuit, electric current control electricity
Road, first exchange directly drive LED chip, second exchange directly drive LED chip, the first resistance, the second resistance,
Oneth LED module and the 2nd LED module, wherein,
Described half-wave rectifying circuit is used for electric main is converted to half-wave voltage, described half-wave rectifying circuit
First input pin is connected with the zero line of described electric main, the second input pin of described half-wave rectifying circuit
It is connected with the live wire of described electric main；The positive output pin of described half-wave rectifying circuit is respectively with described first
Exchange is directly driven the voltage input pin of LED chip and is connected and described 2nd LED directly drives the electricity of LED chip
Pressure input pin is connected and is connected with one end of described first resistance, the negative output of described half-wave rectifying circuit
Pin ground connection；
Described first exchange is directly driven LED chip and is exchanged with second and directly drive LED chip for respectively at respective electricity
Paths pin exports for a described LED module and the operating current of described 2nd LED module；
The other end of described first resistance is exchanged with described first by described second resistance eutral grounding respectively and directly drives
The voltage compensation pin of LED chip and exchange the voltage compensation pin phase directly driving LED chip with described second
Even；
A described LED module is connected across described first exchange and directly drives voltage input pin and the electricity of LED chip
Between circulation road pin；
Described 2nd LED module is connected across described second exchange and directly drives voltage input pin and the electricity of LED chip
Between circulation road pin；
Described current control circuit is for generating the electric current of multiple current value and described electric current is defeated by first
Go out pin to export described first exchange and directly drive the electric current regulation pin of LED chip and by the second output pin
Export described second exchange and directly drive the electric current regulation pin of LED chip.
2. LED illumination circuit as claimed in claim 1, it is characterised in that also include: the 3rd resistance,
4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity
With the 7th electric capacity, wherein,
Described first exchange is directly driven LED chip and is exchanged with described second and directly drive all non-functional of LED chip and draw
Foot ground connection；
The peak detection pin that LED chip is directly driven in described first exchange passes through described first capacity earth, described
First exchange is directly driven the channel current of LED chip and is arranged pin by described 3rd resistance eutral grounding, and described first
Exchange directly drives the internal regulated voltage pin of LED chip by described second capacity earth, described first exchange
Directly driving the enable pin ground connection of LED chip, the analogue ground pin that LED chip is directly driven in described first exchange connects
Ground, the channel delay pin that LED chip is directly driven in described first exchange passes through described 3rd capacity earth, described
First exchange directly drives the predrive regulation voltage pin of LED chip by described 4th capacity earth, and described the
The electric current regulation pin of LED chip and the first output pin phase of described current control circuit are directly driven in one exchange
Even；
The peak detection pin that LED chip is directly driven in described second exchange passes through described 5th capacity earth, described
Second exchange is directly driven the channel current of LED chip and is arranged pin by described 4th resistance eutral grounding, and described second
Exchange directly drives the internal regulated voltage pin of LED chip by described 6th capacity earth, described second exchange
Directly driving the enable pin ground connection of LED chip, the analogue ground pin that LED chip is directly driven in described second exchange connects
Ground, the channel delay pin that LED chip is directly driven in described second exchange passes through described 7th capacity earth, described
Second exchange is directly driven the predrive regulation voltage pin of LED chip and is exchanged with described second and directly drive LED chip
Predrive regulation voltage pin is connected, and described second exchange directly drives the electric current regulation pin of LED chip with described
Second output pin of current control circuit is connected.
3. LED illumination circuit as claimed in claim 1 or 2, it is characterised in that a described LED
Module includes a LED group, the 2nd LED group, the 3rd LED group and the 4th LED group, described second
LED module includes the 5th LED group, the 6th LED group, the 7th LED group and the 8th LED group, described
First exchange is directly driven LED chip and is exchanged with described second and directly drive LED chip and be respectively provided with 4 current channels and draw
Foot, wherein, a described LED group is connected across described first exchange and directly drives the voltage input pin of LED chip
With first between current channel pin, described 2nd LED group is connected across described first exchange and directly drives LED chip
The first current channel pin and the second current channel pin between, described 3rd LED group is connected across described
One exchange is directly driven between the second current channel pin and the 3rd current channel pin of LED chip, and the described 4th
LED group is connected across described first exchange and directly drives the 3rd current channel pin and the 4th current channel of LED chip
Between pin；
Described 5th LED group is connected across described second exchange and directly drives the voltage input pin and first of LED chip
Between current channel pin, described 6th LED group is connected across described second exchange and directly drives the first of LED chip
Between current channel pin and the second current channel pin, described 7th LED group is connected across described second exchange
Directly drive between the second current channel pin and the 3rd current channel pin of LED chip, described 8th LED group
Be connected across described second exchange directly drive the 3rd current channel pin of LED chip and the 4th current channel pin it
Between.
4. LED illumination circuit as claimed in claim 1, it is characterised in that described half-wave rectifying circuit
Including electric fuse, varistor and rectifier bridge, the positive input pin of wherein said rectifier bridge is by described insurance
Silk is connected with the zero line of described electric main, the negative input pin of described rectifier bridge and the fire of described electric main
Line is connected, and the negative output pin ground connection of described rectifier bridge, the positive output pin of described rectifier bridge is respectively with described
First exchange is directly driven the voltage input pin of LED chip and is connected and described 2nd LED directly drives LED chip
Voltage input pin be connected and be connected with one end of described first resistance, described varistor is connected across institute
State between the positive input pin of rectifier bridge and negative input pin.
5. LED illumination circuit as claimed in claim 4, it is characterised in that described current control circuit
Including: two-channel digital control analog switch, DC source, level control circuit, wherein,
Digital signal grounding pin and the analogue ground pin of described two-channel digital control analog switch all connect
Ground, described two-channel digital control analog switch forbid that pin is unsettled, described two-channel digital control simulation
The power pins of switch connects described DC source；
Described two-channel digital controls that the X passage output pin of analog switch is described current control circuit
One output pin, Y passage output pin is the second output pin of described current control circuit；
Described two-channel digital controls the address pin of analog switch and connects the two of described level control circuit respectively
Individual output pin, described level control circuit is for exporting high level or low level on output pin；
X passage input pin and the Y passage input pin of described two-channel digital control analog switch lead to respectively
Cross resistance to be connected with described DC source.
6. LED illumination circuit as claimed in claim 4, it is characterised in that the input of described X passage is drawn
Foot and described Y passage input pin are respectively provided with 4 input pins, and wherein, described two-channel digital controls
X passage first input pin of analog switch is connected with described DC source by the 5th resistance, X passage the
Two input pins are connected with described DC source by the 6th resistance, and X passage the 3rd input pin passes through the 7th
Resistance is connected with described DC source, and X passage the 4th input pin is by the 8th resistance and described DC source
It is connected；Described two-channel digital controls Y passage first input pin of analog switch by the 9th resistance and institute
Stating DC source to be connected, Y passage the second input pin is connected with described DC source by the tenth resistance, Y
Passage the 3rd input pin is connected with described DC source by the 11st resistance, Y passage the 4th input pin
It is connected with described DC source by the 12nd resistance.
7. lighting circuit as claimed in claim 3, it is characterised in that a described LED module includes
Oneth LED, the 2nd LED, the 3rd LED, the 4th LED, the 13rd LED, the 14th LED,
15 LED, the 16th LED, the 17th LED, the 18th LED, the 20th LED, the 21st
LED, the first Zener diode, the second Zener diode, the 15th resistance, the 16th resistance, a MOS
Pipe and the second metal-oxide-semiconductor, wherein,
The anode of a described LED connects described first exchange and directly drives the voltage input pin of LED chip, institute
The first current channel pin of LED chip is directly driven in described first exchange of negative electrode connection stating a LED, described
13rd LED and described 14th LED is in parallel with a described LED；
The first current channel that LED chip is directly driven in described first exchange of anode connection of described 2nd LED draws
Foot, the negative electrode of described 2nd LED connects described first exchange and directly drives the second current channel pin of LED chip,
Described first exchange directly drives the second current channel pin of LED chip by described 15th resistance and described the
The negative electrode of one Zener diode connects and is connected with the grid of described first metal-oxide-semiconductor, described first voltage stabilizing two pole
The plus earth of pipe, described 15th LED, described 16th LED are in parallel with described 2nd LED；
The second current channel that LED chip is directly driven in described first exchange of anode connection of described 3rd LED draws
Foot, the negative electrode of described 3rd LED connects the drain electrode of described first metal-oxide-semiconductor, by described 16th resistance
It is connected with the negative electrode of described second zener diode, by described 16th resistance and described second metal-oxide-semiconductor
Grid connects, and the 3rd current channel pin that LED chip is directly driven in described first exchange connects a described MOS
The source electrode of pipe, described 17th LED, described 18th LED are in parallel with described 3rd LED；
The anode of described 4th LED connects the negative electrode of described 3rd LED, and the anode of described 4th LED is even
Connecing the drain electrode of described second metal-oxide-semiconductor, the 4th current channel pin of LED chip is directly driven in described first exchange
Connect the source electrode of described second metal-oxide-semiconductor.
8. lighting circuit as claimed in claim 7, it is characterised in that described 2nd LED module includes
5th LED, the 7th LED, the 9th LED, the 11st LED, the 6th LED, the 23rd LED,
8th LED, the 24th LED, the tenth LED, the 25th LED, the 12nd LED, the 20th
Seven LED, the 3rd Zener diode, the 4th Zener diode, the 17th resistance, the 18th resistance, the 3rd
Metal-oxide-semiconductor and the 4th metal-oxide-semiconductor, wherein,
The anode of described 5th LED connects described second exchange and directly drives the voltage input pin of LED chip, institute
The first current channel pin of LED chip is directly driven in described second exchange of negative electrode connection stating the 5th LED, described
6th LED and described 23rd LED is in parallel with described 5th LED；
The first current channel that LED chip is directly driven in described second exchange of anode connection of described 7th LED draws
Foot, the negative electrode of described 7th LED connects described second exchange and directly drives the second current channel pin of LED chip,
Described second exchange directly drives the second current channel pin of LED chip by described 17th resistance and described the
The negative electrode of three Zener diodes connects and is connected with the grid of described 3rd metal-oxide-semiconductor, described 3rd voltage stabilizing two pole
The plus earth of pipe, described 8th LED, described 24th LED are in parallel with described 7th LED；
The second current channel that LED chip is directly driven in described second exchange of anode connection of described 9th LED draws
Foot, the negative electrode of described 9th LED connects the drain electrode of described 3rd metal-oxide-semiconductor, by described 18th resistance
It is connected with the negative electrode of described 4th Zener diode, by described 18th resistance and described 4th metal-oxide-semiconductor
Grid connects, and the 3rd current channel pin that LED chip is directly driven in described first exchange connects described 3rd MOS
The source electrode of pipe, described tenth LED, described 25th LED are in parallel with described 9th LED；
The anode of described 11st LED connects the negative electrode of described 9th LED, the sun of described 11st LED
Pole connects the drain electrode of described 4th metal-oxide-semiconductor, and the 4th current channel of LED chip is directly driven in described second exchange
Pin connects the source electrode of described 4th metal-oxide-semiconductor.
9. a lighting, it is characterised in that include the LED as described in claim 1-8 any one
Lighting circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213883.9A CN106211491A (en) | 2015-04-29 | 2015-04-29 | A kind of LED illumination circuit and lighting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510213883.9A CN106211491A (en) | 2015-04-29 | 2015-04-29 | A kind of LED illumination circuit and lighting |
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| CN201510213883.9A Pending CN106211491A (en) | 2015-04-29 | 2015-04-29 | A kind of LED illumination circuit and lighting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106714420A (en) * | 2016-12-16 | 2017-05-24 | 上海希格玛高技术有限公司 | Circuit for controlling stable output of lamp tube intensity |
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Application publication date: 20161207 |