CN207099387U - LED street lamp drive circuit - Google Patents
LED street lamp drive circuit Download PDFInfo
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- CN207099387U CN207099387U CN201720968666.5U CN201720968666U CN207099387U CN 207099387 U CN207099387 U CN 207099387U CN 201720968666 U CN201720968666 U CN 201720968666U CN 207099387 U CN207099387 U CN 207099387U
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Abstract
The utility model discloses a kind of LED street lamp drive circuit, including digital-to-analogue conversion light adjusting circuit and control chip, digital-to-analogue conversion light adjusting circuit includes first voltage comparator, second voltage comparator, the first sampling adjustable resistance, second resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity and power supply, and one end with the 4th resistance, one end of second resistance, a fixing end of the first sampling adjustable resistance and power supply are connected the in-phase input end of first voltage comparator respectively；When pwm signal accesses, exported after digital-to-analogue conversion light adjusting circuit to control chip, control chip is by identifying that different dutycycles exports different electric currents；When 0 10V analog signals access, digital-to-analogue conversion light adjusting circuit relatively after, be converted into data signal and export to control chip, control chip is by identifying that different voltage magnitudes exports different current values.The utility model compatibility is preferably, Costco Wholesale is relatively low, reliability is stronger.
Description
Technical field
LED street lamp Qu Donglingyu is the utility model is related to, more particularly to a kind of LED street lamp drive circuit.
Background technology
In LED street lamp driving power, it is a critically important function to realize street light modulating, and traditional dimming mode has
Pwm signal light modulation, the light modulation of 0-10V signals and resistance light modulation, the present invention only compatible pwm signal light modulation and the light modulation of 0-10V signals.It
Preceding street light modulating, a kind of way are dimmed using single signal, are pwm signal light modulation and the light modulation of 0-10V signals, this side respectively
Formula lacks compatibility, not general.Also a kind of way is three-in-one light modulation, and pwm signal, 0-10V signals and resistance light modulation pass through
A port input realizes that LED street lamp dims, and the cost of this way can be very high, generally to use an expensive monolithic
Electromechanical road, the holistic cost and volume of LED street lamp driving can be increased.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided a kind of compatibility
Preferably, the LED street lamp drive circuit that Costco Wholesale is relatively low, reliability is stronger.
Technical scheme is used by the utility model solves its technical problem：A kind of LED street lamp drive circuit is constructed, is wrapped
Digital-to-analogue conversion light adjusting circuit and control chip are included, the digital-to-analogue conversion light adjusting circuit includes first voltage comparator, second voltage
Comparator, the first sampling adjustable resistance, second resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity
And power supply, the in-phase input end of the first voltage comparator one end with the 4th resistance, second resistance respectively
One end, a fixing end of the first sampling adjustable resistance connect with the power supply, a fixing end of the first sampling adjustable resistance
It is connected with its sliding end, to be all connected with signal defeated for another fixing end of the other end of the second resistance and the first sampling adjustable resistance
Enter the negative pole at end and ground connection, the inverting input of the first voltage comparator one end with first electric capacity, the 5th respectively
One end of resistance connects with the inverting input of second voltage comparator, and the other end and first voltage of first electric capacity compare
The grounding pin of device is grounded, and the other end of the 5th resistance is respectively compared with one end of the 4th resistance and first voltage
The output end connection of device, the power pins of the first voltage comparator are electric with the other end of the 4th resistance and power supply respectively
Source connects, the in-phase input end of the second voltage comparator respectively with one end of the 6th resistance and signal input part just
Pole is connected, and the other end of the 6th resistance and the power pins of second voltage comparator are connected with the power supply, institute
The output end for stating second voltage comparator is connected with one end of the 7th resistance and control chip respectively, the 7th resistance
The other end is connected with the power supply, and the grounding pin ground connection of the second voltage comparator, the signal input part is just
Pole inputs 0-10V analog signals or pwm signal；
When the pwm signal accesses, exported after the digital-to-analogue conversion light adjusting circuit to the control chip, it is described
Control chip is by identifying that different dutycycles accordingly exports different electric currents；It is described when the 0-10V analog signals access
Digital-to-analogue conversion light adjusting circuit relatively after, be converted into data signal and export to pass through identification to the control chip, the control chip
Different voltage magnitudes accordingly exports different current values.
In LED street lamp drive circuit described in the utility model, the digital-to-analogue conversion light adjusting circuit also includes the 8th electricity
Resistance, the output end of the second voltage comparator are connected by the 8th resistance with the control chip.
In LED street lamp drive circuit described in the utility model, the digital-to-analogue conversion light adjusting circuit also includes the one or two
Pole pipe, the anode of first diode are connected with the input in the same direction of the second voltage comparator, first diode
Negative electrode be connected with the positive pole of the signal input part.
In LED street lamp drive circuit described in the utility model, the digital-to-analogue conversion light adjusting circuit also includes the 3rd electricity
Resistance, one end of the 3rd resistor are connected with one end of the 4th resistance, the other end of the 3rd resistor and described first
The input end in the same direction connection of voltage comparator.
In LED street lamp drive circuit described in the utility model, the digital-to-analogue conversion light adjusting circuit also includes the first electricity
Resistance, one end of the first resistor are connected with the power supply, the other end of the first resistor and the first voltage ratio
Input in the same direction compared with device connects.
Implement LED street lamp drive circuit of the present utility model, have the advantages that：Due to being dimmed using digital-to-analogue conversion
Circuit and control chip, digital-to-analogue conversion light adjusting circuit includes first voltage comparator, second voltage comparator, the first sampling is adjustable
Resistance, second resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity and power supply, when PWM believes
During number access, export to control chip after digital-to-analogue conversion light adjusting circuit, control chip is by identifying different dutycycle phases
Different electric currents should be exported；When 0-10V analog signals access, digital-to-analogue conversion light adjusting circuit relatively after, be converted into data signal
Export to control chip, control chip is by identifying that different voltage magnitudes accordingly exports different current values, using cost very
Low pure hardware circuit realizes the compatibility of two kinds of dimming modes of 0-10V signals and pwm signal, had so both reduced cost or had increased
The compatibility of dimming mode is added.Both expensive single-chip microcomputer light adjusting circuit had been saved, and can is adjusted while realizing two modes
Light.Above circuit has the characteristics of compatibility is good, Costco Wholesale is low, highly reliable.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the electrical block diagram in the utility model LED street lamp drive circuit one embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
In the utility model LED street lamp drive circuit embodiment, the structural representation of the LED street lamp drive circuit is as schemed
Shown in 1.In Fig. 1, first voltage comparator AR1, second voltage comparator AR2, the first sampling adjustable resistance SVR1, second resistance
R2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first electric capacity C1 and power supply VCC form number
Mould changes light adjusting circuit, and the LED street lamp drive circuit includes digital-to-analogue conversion light adjusting circuit and control chip, wherein, first voltage
One end with the 4th resistance R4, second resistance R2 one end, first sample adjustable resistance to comparator AR1 in-phase input end respectively
A SVR1 fixing end is connected with power supply VCC, and a first sampling adjustable resistance SVR1 fixing end is connected with its sliding end,
The second resistance R2 other end and the first sampling adjustable resistance SVR1 another fixing end are all connected with the negative pole of signal input part simultaneously
Ground connection, first voltage comparator AR1 inverting input one end with the first electric capacity C1, the 5th resistance R5 one end and the respectively
Two voltage comparator AR2 inverting input connection.
The first electric capacity C1 other end and first voltage comparator AR1 grounding pin are grounded, and the 5th resistance R5's is another
One end is connected with the 4th resistance R4 one end and first voltage comparator AR1 output end respectively, first voltage comparator AR1's
Power pins are connected with the 4th resistance the R4 other end and power supply VCC respectively, second voltage comparator AR2 homophase input
End is connected with the 6th resistance R6 one end and the positive pole of signal input part respectively, the 6th resistance the R6 other end and second voltage ratio
Power pins compared with device AR2 are connected with power supply VCC, second voltage comparator AR2 output end respectively with the 7th resistance
R7 one end is connected with control chip, and the 7th resistance R7 other end is connected with power supply VCC, second voltage comparator AR2
Grounding pin ground connection, the positive pole input 0-10V analog signals or pwm signal of signal input part.
In Fig. 1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity
C1, the first sampling adjustable resistance SVR1 and first voltage comparator AR1 form triangular-wave generator, can by the sampling of regulation first
The position of resistance SVR1 sliding end is adjusted, tune can be passed through with the reference signal size of the input positive terminal of adjusting triangle wave producer
Section first voltage comparator AR1 reference signal changes the dutycycle of the triangular wave of output, and the three of first voltage comparator AR1
Negative input of the angle wave output signal as second voltage comparator AR2, that is, second voltage comparator AR2 negative pole base
Calibration signal end, it is compared by the pwm signal or 0-10V sampled signals of the positive pole with signal input part, so as to change second
Voltage comparator AR2 output square-wave signal, the square-wave signal are used for the size of current of adjustment control chip.
When pwm signal accesses, it (is specifically the electricity of first voltage comparator AR1 and second that digital-to-analogue conversion light adjusting circuit, which compares,
Pressure comparator AR2 is compared) export afterwards to control chip, control chip is by identifying that different dutycycles accordingly exports difference
Electric current；When 0-10V analog signals access, digital-to-analogue conversion light adjusting circuit relatively after, be converted into data signal and export to control
Chip, control chip is by identifying that different voltage magnitudes accordingly exports different current values.
By the way that the driving power of LED street lamp is carried into digital-to-analogue conversion light adjusting circuit, it is possible to achieve pwm signal dims and 0-
10V is dimmed, and two kinds of dimming modes are realized by a port can.The compatibility of dimming mode is so added, is also saved
Expensive single-chip microcomputer light adjusting circuit, therefore compatibility is good, Costco Wholesale is low, highly reliable.
In the present embodiment, the digital-to-analogue conversion light adjusting circuit also includes the 8th resistance R8, second voltage comparator AR2 output
End is connected by the 8th resistance R8 with control chip.8th resistance R8 is current-limiting resistance, for carrying out overcurrent protection, to strengthen electricity
The safety and reliability on road.
In the present embodiment, the digital-to-analogue conversion light adjusting circuit also includes the first diode D1, the first diode D1 anode with
Second voltage comparator AR2 input in the same direction connection, the first diode D1 negative electrode and the positive pole of signal input part connect.This
In embodiment, the digital-to-analogue conversion light adjusting circuit also includes 3rd resistor R3,3rd resistor R3 one end and the one of the 4th resistance R4
End connection, the 3rd resistor R3 other end are connected with first voltage comparator AR1 input end in the same direction.3rd resistor R3 is output
Positive feedback resistor, for realizing the positive feedback of circuit.
In the present embodiment, the digital-to-analogue conversion light adjusting circuit also includes first resistor R1, first resistor R1 one end and power supply
Power supply VCC connections, the first resistor R1 other end are connected with first voltage comparator AR1 input in the same direction.First resistor R1
For current-limiting resistor voltage divider, carried out for the branch road between the in-phase input end and power supply VCC to first voltage comparator AR1
Overcurrent protection, and the voltage sample to first voltage comparator AR1, by the sampling adjustable resistance SVR1 of increase by first, enter one
The security of step enhancing circuit and the precision of partial pressure.
In a word, in the present embodiment, can be realized by the way that the driving power of LED street lamp is carried into digital-to-analogue conversion light adjusting circuit
Pwm signal dims and 0-10V light modulations, two kinds of dimming modes, it is achieved that when pwm signal accesses, are somebody's turn to do by a port
Exported after digital-to-analogue conversion light adjusting circuit to control chip, control chip is by identifying that different dutycycles exports different electricity
Stream；When 0-10V analog signals access, the digital-to-analogue conversion light adjusting circuit relatively after, be converted into data signal export core to control
Piece, control chip is by identifying that different voltage magnitudes exports different current values.The compatibility of dimming mode can so be increased
Property, while expensive single-chip microcomputer light adjusting circuit is eliminated, therefore compatibility is good, Costco Wholesale is low, and reliability is stronger.Its energy
Solves the problems such as compatible bad or light-adjusting module circuit of LED street lamp dimming mode of prior art is complicated, and cost is high.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (5)
- A kind of 1. LED street lamp drive circuit, it is characterised in that including digital-to-analogue conversion light adjusting circuit and control chip, the digital-to-analogue Changing light adjusting circuit includes first voltage comparator, second voltage comparator, the first sampling adjustable resistance, second resistance, the 4th Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity and power supply, the first voltage comparator it is same mutually defeated Enter end one end with the 4th resistance, one end of second resistance, the first sampling one fixing end of adjustable resistance and described respectively Power supply connect, first sampling adjustable resistance a fixing end be connected with its sliding end, the other end of the second resistance with Another fixing end of first sampling adjustable resistance is all connected with negative pole and the ground connection of signal input part, the first voltage comparator Inverting input one end, one end of the 5th resistance and the inverting input of second voltage comparator with first electric capacity respectively Connection, the other end of first electric capacity and the grounding pin of first voltage comparator be grounded, the 5th resistance it is another End is connected with one end of the 4th resistance and the output end of first voltage comparator respectively, the electricity of the first voltage comparator Source pin is connected with the other end and power supply of the 4th resistance respectively, the in-phase input end of the second voltage comparator It is connected respectively with one end of the 6th resistance and the positive pole of signal input part, the other end and second voltage of the 6th resistance The power pins of comparator are connected with the power supply, and the output end of the second voltage comparator is respectively with the described 7th One end of resistance is connected with control chip, and the other end of the 7th resistance is connected with the power supply, the second voltage The grounding pin ground connection of comparator, the positive pole input 0-10V analog signals or pwm signal of the signal input part；When the pwm signal accesses, exported after the digital-to-analogue conversion light adjusting circuit to the control chip, the control Chip is by identifying that different dutycycles accordingly exports different electric currents；When the 0-10V analog signals access, the digital-to-analogue After changing light adjusting circuit relatively, it is converted into data signal and exports to the control chip, the control chip is by identifying difference Voltage magnitude accordingly export different current values.
- 2. LED street lamp drive circuit according to claim 1, it is characterised in that the digital-to-analogue conversion light adjusting circuit also wraps The 8th resistance is included, the output end of the second voltage comparator is connected by the 8th resistance with the control chip.
- 3. LED street lamp drive circuit according to claim 1 or 2, it is characterised in that the digital-to-analogue conversion light adjusting circuit is also Including the first diode, the anode of first diode is connected with the input in the same direction of the second voltage comparator, described The negative electrode of first diode is connected with the positive pole of the signal input part.
- 4. LED street lamp drive circuit according to claim 3, it is characterised in that the digital-to-analogue conversion light adjusting circuit also wraps Include 3rd resistor, one end of the 3rd resistor is connected with one end of the 4th resistance, the other end of the 3rd resistor with The input end in the same direction connection of the first voltage comparator.
- 5. LED street lamp drive circuit according to claim 3, it is characterised in that the digital-to-analogue conversion light adjusting circuit also wraps First resistor is included, one end of the first resistor is connected with the power supply, the other end of the first resistor and described the The input in the same direction connection of one voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720968666.5U CN207099387U (en) | 2017-08-02 | 2017-08-02 | LED street lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720968666.5U CN207099387U (en) | 2017-08-02 | 2017-08-02 | LED street lamp drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207099387U true CN207099387U (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720968666.5U Active CN207099387U (en) | 2017-08-02 | 2017-08-02 | LED street lamp drive circuit |
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| CN (1) | CN207099387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633143A (en) * | 2018-07-18 | 2018-10-09 | 惠州市烁达德高光电科技有限公司 | A kind of light adjusting circuit of LED light |
-
2017
- 2017-08-02 CN CN201720968666.5U patent/CN207099387U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633143A (en) * | 2018-07-18 | 2018-10-09 | 惠州市烁达德高光电科技有限公司 | A kind of light adjusting circuit of LED light |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 518116 No.1 and 3, Tongfu Road, Pingdong community, Pingdi street, Longgang District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN DARK ENERGY POWER SUPPLY Co.,Ltd. Address before: 518100 buildings a and D, Dahua Industrial Zone, 8 Jixiang Road, Pingdi street, Longgang District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN DARK ENERGY POWER SUPPLY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |