CN208128596U - A kind of wide input voltage intelligent dimming LED driver - Google Patents
A kind of wide input voltage intelligent dimming LED driver Download PDFInfo
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- CN208128596U CN208128596U CN201820694651.9U CN201820694651U CN208128596U CN 208128596 U CN208128596 U CN 208128596U CN 201820694651 U CN201820694651 U CN 201820694651U CN 208128596 U CN208128596 U CN 208128596U
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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]
Abstract
The utility model discloses a kind of wide input voltage intelligent dimming LED drivers, belong to electronic technology field, circuit occurs including regulator rectifier circuit, LED drive circuit, illuminance Acquisition Circuit and PWM, solves the technical issues of illuminance that LED light is intelligently adjusted according to environment light, the utility model directly overlaps out PWM drive signal using gate circuit, it is controlled without MCU, save development cycle and development cost, save cost, the utility model is simple using circuit structure, easy to maintain.
Description
Technical field
The utility model belongs to electronic technology field, in particular to a kind of wide input voltage intelligent dimming LED driver.
Background technique
Building lighting is the important link in building construction, and the color change of LED can be greatly lowered in PWM light modulation,
And having different brightness levels, people are very strict to the requirement in furniture at present, how to reduce unnecessary electric light line, realize
Further energy-saving and emission-reduction are the important subjects of LED light modulation drive area.
Utility model content
The purpose of the utility model is to provide a kind of wide input voltage intelligent dimming LED drivers, solve according to environment
Light intelligently adjusts the technical issues of illuminance of LED light.
To achieve the above object, the utility model uses following technical scheme：
A kind of wide input voltage intelligent dimming LED driver, including regulator rectifier circuit, LED drive circuit, illuminance are adopted
Circuit occurs for collector and PWM；
Regulator rectifier circuit includes high pressure ceramic disc capacitor C3, rectifier bridge D2, capacitor C2, voltage-stablizer IC4, capacitor C8 and capacitor
C9, high pressure ceramic disc capacitor C3 are connected in parallel between 1 foot of rectifier bridge D2 and 3 feet, and external 7 are connected between 1 foot and 3 feet of rectifier bridge D2
~36V alternating current, 4 feet of rectifier bridge D2 connect ground wire, and 2 feet of rectifier bridge D2 connect 1 foot of voltage-stablizer IC4, voltage-stablizer IC4's
2 feet connection ground wire, the 3 feet output 5V power supply of voltage-stablizer IC4, capacitor C8 and capacitor C9 are connected in parallel on voltage-stablizer as filter capacitor
On 3 feet of IC4；
The model LM7805 of the voltage-stablizer IC4.
LED drive circuit includes driving chip IC1, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode
D1, inductance L2 and LED drive interface J2, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode D1 and inductance L2
The peripheral circuit of driving chip IC1 is constituted, the VIN foot of driving chip IC1 connects 2 feet of rectifier bridge D2, driving chip IC1's
SW foot passes through 2 feet of inductance L1 connection LED drive interface J2, and the SENSE foot of driving chip IC1 connects the 1 of LED drive interface J2
Foot, the cathode of the 2 feet connection LED light group of LED drive interface J2, the anode of the 1 foot connection LED light group of LED drive interface J2；It drives
The ADJ foot of dynamic chip IC 1 passes through capacitor C4 connection ground wire；
The model SD42524 of the driving chip IC1.
The external LED lamp group of the LED drive interface J2 connection is series LED lamp group, and series LED lamp group is by several
LED light is connected in series, and is equipped with a positive input terminal and a negative input end.
Illuminance Acquisition Circuit includes that illuminance sensor interface J1, resistance R7 and potentiometer R6, illuminance sensor connect
3 feet of mouth J1 connect 5V power supply, and 1 foot of illuminance sensor interface J1 connects ground wire, and 2 feet of illuminance sensor interface J1 are logical
It crosses the resistance R7 being connected in series and connects ground wire with potentiometer R6；
It includes operational amplifier IC3, silicon-controlled D4, capacitor C5, diode D10, resistance R8, triode that circuit, which occurs, for PWM
Q9, resistance R5, resistance R3, resistance R10, capacitor C11 and gate circuit IC2, the positive input terminal connection ground wire of operational amplifier IC3,
Negative input end connects the pole A of silicon-controlled D4, and the output end of operational amplifier IC3 connects the anode of diode D10, silicon-controlled D4's
The pole K connects the output end of operational amplifier IC3, and capacitor C5 is in parallel with silicon-controlled D4, and the pole G of silicon-controlled D4 is connected by resistance R3
The 1Y pin of gate circuit IC2, the cathode of diode D10 pass through the base stage of resistance R8 connecting triode Q9, the current collection of triode Q9
Pole connects ground wire by resistance R5 connection 5V power supply, the emitter of triode Q9, and the collector of triode Q9 is also connected with gate circuit
The 1A pin of IC2, the 2Y pin of the 1B pin connection gate circuit IC2 of gate circuit IC2, the 2A pin of gate circuit IC2 connect its 1Y
Pin, the 2B pin of gate circuit IC2 connect its 3Y pin, and the 3A pin of gate circuit IC2 connects its 1Y pin by resistance R10,
The 3A pin of gate circuit IC2 also passes through capacitor C11 connection ground wire, and the 3B pin of gate circuit IC2 connects 5V power supply, gate circuit IC2
2Y pin connection driving chip IC1 the end PWM.
Four tunnel 2 of model of the gate circuit inputs positive NAND gate SN7400；The model of the operational amplifier
LM385；The silicon-controlled D4 is silicon controlled rectifier (SCR) 2N5060.
The external illuminance sensor of the illuminance sensor interface J1 connection, the illuminance sensor interface J1 connection
External illuminance sensor, the illuminance sensor include resistance R4 and photo resistance R2, described in one end connection of resistance R4
3 feet of illuminance sensor interface J1, the other end connect 1 foot of the illuminance sensor interface J1 by photo resistance R2,
The connecting node of resistance R4 and photo resistance R2 is also connected with 2 feet of the illuminance sensor interface J1.
7~36V of outside alternating current will be obtained by transformer after alternating current power transformation, and the transformer can be selected 220V and turn
The transformer of 36V.
A kind of wide input voltage intelligent dimming LED driver described in the utility model is solved according to environment light intelligence
The technical issues of adjusting the illuminance of LED light, the utility model directly overlap out PWM drive signal using gate circuit, are not necessarily to MCU
It is controlled, saves development cycle and development cost, save cost, the utility model is simple using circuit structure, maintenance
It is convenient.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
A kind of wide input voltage intelligent dimming LED driver as shown in Figure 1, including regulator rectifier circuit, LED driving electricity
Circuit occurs for road, illuminance Acquisition Circuit and PWM；
Regulator rectifier circuit includes high pressure ceramic disc capacitor C3, rectifier bridge D2, capacitor C2, voltage-stablizer IC4, capacitor C8 and capacitor
C9, high pressure ceramic disc capacitor C3 are connected in parallel between 1 foot of rectifier bridge D2 and 3 feet, and external 7 are connected between 1 foot and 3 feet of rectifier bridge D2
~36V alternating current, 4 feet of rectifier bridge D2 connect ground wire, and 2 feet of rectifier bridge D2 connect 1 foot of voltage-stablizer IC4, voltage-stablizer IC4's
2 feet connection ground wire, the 3 feet output 5V power supply of voltage-stablizer IC4, capacitor C8 and capacitor C9 are connected in parallel on voltage-stablizer as filter capacitor
On 3 feet of IC4；
The model LM7805 of the voltage-stablizer IC4.
The input voltage range of LM7805 is 7V to 36V, and the operating voltage range of SD42524 is 6V to 36V, using this
Two chips expand input voltage range as power supply chip and driving chip, realize Width funtion input design.
LM7805 occurs circuit and provides stable 5V supply voltage for illuminance Acquisition Circuit and PWM.
LED drive circuit includes driving chip IC1, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode
D1, inductance L2 and LED drive interface J2, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode D1 and inductance L2
The peripheral circuit of driving chip IC1 is constituted, the VIN foot of driving chip IC1 connects 2 feet of rectifier bridge D2, driving chip IC1's
SW foot passes through 2 feet of inductance L1 connection LED drive interface J2, and the SENSE foot of driving chip IC1 connects the 1 of LED drive interface J2
Foot, the cathode of the 2 feet connection LED light group of LED drive interface J2, the anode of the 1 foot connection LED light group of LED drive interface J2；It drives
The ADJ foot of dynamic chip IC 1 passes through capacitor C4 connection ground wire；
The model SD42524 of the driving chip IC1.
SD42524 is voltage-dropping type, PWM control, the LED drive chip built in power switch.In wide input voltage model
In enclosing, output electric current can reach 1A.
SD42524 chip interior the smallest settling time when PWM is dimmed can reach less than 20 μ S, PWM most high light modulation ratios
To 500：1.When need high light modulation than when, light modulating frequency recommend 500Hz hereinafter, light modulation than it is of less demanding when, light modulating frequency can
To reach 2kHz.
The external LED lamp group of the LED drive interface J2 connection is series LED lamp group, and series LED lamp group is by several
LED light is connected in series, and is equipped with a positive input terminal and a negative input end.
Illuminance Acquisition Circuit includes that illuminance sensor interface J1, resistance R7 and potentiometer R6, illuminance sensor connect
3 feet of mouth J1 connect 5V power supply, and 1 foot of illuminance sensor interface J1 connects ground wire, and 2 feet of illuminance sensor interface J1 are logical
It crosses the resistance R7 being connected in series and connects ground wire with potentiometer R6；
The external illuminance sensor of the illuminance sensor interface J1 connection, the illuminance sensor includes resistance R4
With photo resistance R2, one end of resistance R4 connects 3 feet of the illuminance sensor interface J1, and the other end passes through photo resistance R2
1 foot of the illuminance sensor interface J1 is connected, the connecting node of resistance R4 and photo resistance R2 is also connected with the illuminance
2 feet of sensor interface J1, when illuminance variation, the partial pressure on resistance R4 changes therewith, which passes through resistance R7
After the partial pressure of potentiometer R6, it is transmitted to the negative input end of operational amplifier IC3, potentiometer R6 is build-out resistor, for going out
The adjusting and matching of voltage sample value are carried out before factory；Partial pressure on resistance R4 is inversely proportional with illuminance.
It includes operational amplifier IC3, silicon-controlled D4, capacitor C5, diode D10, resistance R8, triode that circuit, which occurs, for PWM
Q9, resistance R5, resistance R3, resistance R10, capacitor C11 and gate circuit IC2, the positive input terminal connection ground wire of operational amplifier IC3,
Negative input end connects the pole A of silicon-controlled D4, and the output end of operational amplifier IC3 connects the anode of diode D10, silicon-controlled D4's
The pole K connects the output end of operational amplifier IC3, and capacitor C5 is in parallel with silicon-controlled D4, and the pole G of silicon-controlled D4 is connected by resistance R3
The 1Y pin of gate circuit IC2, the cathode of diode D10 pass through the base stage of resistance R8 connecting triode Q9, the current collection of triode Q9
Pole connects ground wire by resistance R5 connection 5V power supply, the emitter of triode Q9, and the collector of triode Q9 is also connected with gate circuit
The 1A pin of IC2, the 2Y pin of the 1B pin connection gate circuit IC2 of gate circuit IC2, the 2A pin of gate circuit IC2 connect its 1Y
Pin, the 2B pin of gate circuit IC2 connect its 3Y pin, and the 3A pin of gate circuit IC2 connects its 1Y pin by resistance R10,
The 3A pin of gate circuit IC2 also passes through capacitor C11 connection ground wire, and the 3B pin of gate circuit IC2 connects 5V power supply, gate circuit IC2
2Y pin connection driving chip IC1 the end PWM.
Operational amplifier IC3, silicon-controlled D4, capacitor C5, diode D10, resistance R8, triode Q9, resistance R5, resistance
R3, resistance R10, capacitor C11 and gate circuit IC2 constitute a low frequency voltage controlled oscillator, and output frequency is with operational amplifier
The transformation of the voltage of the negative input end of IC3 and transformation, frequency can be changed to 1000Hz by 10Hz, meet SD42524 in PWM tune
Light time need frequency be less than 500Hz requirement, four tunnels 2 input positive NAND gate SN7400 include 3 NAND gate circuits, and by this three
NAND gate circuit forms a trigger, and usually 1Y pin output is low level, silicon-controlled D4 cut-off, operational amplifier IC3, electricity
Hold C5 and constitute an integrator, when silicon-controlled D4 cut-off, the output of integrator is loaded by diode D1O in triode Q9
Base stage, be that triode Q9 conducting and is set to trigger, that is, 1Y pin is exported at this time when the output of integrator reaches 1.4V
High level, silicon-controlled D4 conducting, integrator capacitor C5 discharge rapidly, delay of the high level of 1Y pin output through 1us and fall down
Make trigger reset after that, when integrator capacitor C5 discharges into 0.7V, that is, reach the blanking voltage of silicon-controlled D4, it is silicon-controlled
D4 cut-off, that is, start second integration period.
Pass through the another output of slave flipflop, i.e. the TTL wave level of the available negative sense of 2Y pin, waveform electricity
The flat light modulation PWM square wave being used for SD42524.
Capacitor C3 uses high pressure ceramic disc capacitor CT81-2.2N/1K, and circuit is protected not destroyed by surge.
Photo resistance R2 is the prior art, therefore is not described in detail, and photo resistance R2 uses the photo resistance of 5V power supply.
In use, illuminance sensor is placed on wall, to acquire ambient light illumination, LED light group is placed in day
Card, for illuminating to entire room, regulator rectifier circuit, LED drive circuit, illuminance Acquisition Circuit and PWM occur
Circuit is located on the same wiring board, and LED light group is connect by conducting wire with LED drive interface J2, and illuminance sensor is by leading
Line is connect with illuminance sensor interface J1, and when illuminance is too low, the resistance of photo resistance R2 is lower at this time, point of resistance R2
Buckling is high, and the output frequency of low frequency voltage controlled oscillator is got higher, i.e. SD42524 improves the illuminance of LED light group, conversely,
SD42524 reduces the illuminance of LED light group, realizes the design of intelligent dimming.
Four tunnel 2 of model of the gate circuit inputs positive NAND gate SN7400；The model of the operational amplifier
LM385；The silicon-controlled D4 is silicon controlled rectifier (SCR) 2N5060.
The external illuminance sensor of the illuminance sensor interface J1 connection, the model of the illuminance sensor
TEMT6000。
7~36V of outside alternating current will be obtained by transformer after alternating current power transformation, and the transformer can be selected 220V and turn
The transformer of 36V.
A kind of wide input voltage intelligent dimming LED driver described in the utility model is solved according to environment light intelligence
The technical issues of adjusting the illuminance of LED light, the utility model directly overlap out PWM drive signal using gate circuit, are not necessarily to MCU
It is controlled, saves development cycle and development cost, save cost, the utility model is simple using circuit structure, maintenance
It is convenient.
Claims (5)
1. a kind of wide input voltage intelligent dimming LED driver, it is characterised in that：Including regulator rectifier circuit, LED driving electricity
Circuit occurs for road, illuminance Acquisition Circuit and PWM；
Regulator rectifier circuit includes high pressure ceramic disc capacitor C3, rectifier bridge D2, capacitor C2, voltage-stablizer IC4, capacitor C8 and capacitor C9,
High pressure ceramic disc capacitor C3 is connected in parallel between 1 foot of rectifier bridge D2 and 3 feet, connect external 7 between 1 foot and 3 feet of rectifier bridge D2~
36V alternating current, the 4 feet connection ground wire of rectifier bridge D2,1 foot of the 2 feet connection voltage-stablizer IC4 of rectifier bridge D2, the 2 of voltage-stablizer IC4
Foot connection ground wire, the 3 feet output 5V power supply of voltage-stablizer IC4, capacitor C8 and capacitor C9 are connected in parallel on voltage-stablizer IC4 as filter capacitor
3 feet on；
LED drive circuit includes driving chip IC1, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode D1, electricity
Feel L2 and LED drive interface J2, capacitor C4, capacitor C6, capacitor C7, resistance R1, capacitor C1, diode D1 and inductance L2 are constituted
The peripheral circuit of driving chip IC1,2 feet of the VIN foot connection rectifier bridge D2 of driving chip IC1, the SW foot of driving chip IC1 are logical
Cross 2 feet of inductance L1 connection LED drive interface J2,1 foot of the SENSE foot connection LED drive interface J2 of driving chip IC1, LED
The cathode of the 2 feet connection LED light group of driving interface J2, the anode of the 1 foot connection LED light group of LED drive interface J2；Driving chip
The ADJ foot of IC1 passes through capacitor C4 connection ground wire；
Illuminance Acquisition Circuit includes illuminance sensor interface J1, resistance R7 and potentiometer R6, illuminance sensor interface J1
3 feet connect 5V power supply, 1 foot of illuminance sensor interface J1 connects ground wire, and 2 feet of illuminance sensor interface J1 pass through string
The resistance R7 of connection connection connects ground wire with potentiometer R6；
It includes operational amplifier IC3, silicon-controlled D4, capacitor C5, diode D10, resistance R8, triode Q9, electricity that circuit, which occurs, for PWM
The positive input terminal for hindering R5, resistance R3, resistance R10, capacitor C11 and gate circuit IC2, operational amplifier IC3 connects ground wire, negative input
End connects the pole A of silicon-controlled D4, and the anode of the output end connection diode D10 of operational amplifier IC3, the pole K of silicon-controlled D4 connects
The output end of operational amplifier IC3 is connect, capacitor C5 is in parallel with silicon-controlled D4, and the pole G of silicon-controlled D4 passes through resistance R3 connection door electricity
The 1Y pin of road IC2, the cathode of diode D10 pass through the base stage of resistance R8 connecting triode Q9, and the collector of triode Q9 is logical
Resistance R5 connection 5V power supply is crossed, the emitter of triode Q9 connects ground wire, and the collector of triode Q9 is also connected with gate circuit IC2's
1A pin, the 2Y pin of the 1B pin connection gate circuit IC2 of gate circuit IC2, the 2A pin of gate circuit IC2 connect its 1Y pin,
The 2B pin of gate circuit IC2 connects its 3Y pin, and the 3A pin of gate circuit IC2 connects its 1Y pin, gate circuit by resistance R10
The 3A pin of IC2 also passes through capacitor C11 connection ground wire, and the 3B pin of gate circuit IC2 connects 5V power supply, the 2Y pipe of gate circuit IC2
The end PWM of foot connection driving chip IC1.
2. a kind of wide input voltage intelligent dimming LED driver as described in claim 1, it is characterised in that：The voltage-stablizer
The model LM7805 of IC4；Four tunnel 2 of model of the gate circuit inputs positive NAND gate SN7400；The operational amplifier
Model LM385, the silicon-controlled D4 are silicon controlled rectifier (SCR) 2N5060；The model SD42524 of the driving chip IC1.
3. a kind of wide input voltage intelligent dimming LED driver as described in claim 1, it is characterised in that：The LED driving
The external LED lamp group of interface J2 connection is series LED lamp group.
4. a kind of wide input voltage intelligent dimming LED driver as described in claim 1, it is characterised in that：The illuminance
The external illuminance sensor of sensor interface J1 connection, the illuminance sensor includes resistance R4 and photo resistance R2, resistance
One end of R4 connects 3 feet of the illuminance sensor interface J1, and the other end is passed by the photo resistance R2 connection illuminance
The connecting node of 1 foot of sensor interface J1, resistance R4 and photo resistance R2 are also connected with the 2 of the illuminance sensor interface J1
Foot.
5. a kind of wide input voltage intelligent dimming LED driver as described in claim 1, it is characterised in that：The outside 7~
36V alternating current will be obtained by transformer after alternating current power transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820694651.9U CN208128596U (en) | 2018-05-10 | 2018-05-10 | A kind of wide input voltage intelligent dimming LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820694651.9U CN208128596U (en) | 2018-05-10 | 2018-05-10 | A kind of wide input voltage intelligent dimming LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208128596U true CN208128596U (en) | 2018-11-20 |
Family
ID=64184755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820694651.9U Expired - Fee Related CN208128596U (en) | 2018-05-10 | 2018-05-10 | A kind of wide input voltage intelligent dimming LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208128596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283614A (en) * | 2021-12-23 | 2022-04-05 | 深圳市道网科技有限公司 | Intelligent parking management system |
-
2018
- 2018-05-10 CN CN201820694651.9U patent/CN208128596U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283614A (en) * | 2021-12-23 | 2022-04-05 | 深圳市道网科技有限公司 | Intelligent parking management system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |