CN207911069U - Constant current output high pressure dimming driver - Google Patents
Constant current output high pressure dimming driver Download PDFInfo
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- CN207911069U CN207911069U CN201721682196.2U CN201721682196U CN207911069U CN 207911069 U CN207911069 U CN 207911069U CN 201721682196 U CN201721682196 U CN 201721682196U CN 207911069 U CN207911069 U CN 207911069U
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Abstract
The utility model discloses a kind of constant current output high pressure dimming drivers, including EMI circuits, rectification circuit, pfc circuit, buck circuits, output rectification circuit, dim signal input circuit, one-chip computer module and adjusting control circuit.The 127V or 220V AC voltage obtained from alternating current, is handled by EMI circuits, then passes through rectification circuit, become DC voltage supply pfc circuit, pfc circuit generates a 100KHz high-frequency PWM signal and provides a stable 400V DC voltage by PFC rectifier diodes for buck circuits；Buck circuits and high frequency transformer provide variable an output AC voltage and electric current；Output high voltage is converted into high-voltage dc voltage by output rectification circuit；One-chip computer module detects dim signal variation, the reference voltage of adjusting control circuit is changed, come control output voltage and current size because circuit be rectification output, output voltage can be accomplished within 400VDC, and output voltage may be implemented and dimmed in 5 380VDC.
Description
Technical field
The utility model is related to LED drive circuit technical field more particularly to a kind of constant current output high pressure dimming drivers.
Background technology
In recent years, the present situation of energy shortages makes people more recognize the importance of energy-saving and emission-reduction.LED is as novel height
Solid light source is imitated, has the characteristics that energy-saving and environmental protection, long lifespan, small, in high-power illuminations such as road lighting, tunnel illuminations
Occasion is widely used.Current LED flat lamp driving has constant current and constant pressure two ways, for this light sources of LED one
As for meaning, its life-time dilatation is conducive to using constant current mode.Because under constant voltage mode, once the electric current for passing through LED
It changes, the temperature of the PN junction of LED will be varied from, this service life concerning LED, and constant current driving ensures that and passes through LED
Electric current will not change, the PN junction temperature change of LED would not also occur.But constant current LED power supplies in the prior art can not
Realize intelligent dimming output.
Utility model content
Technical problem to be solved in the utility model is how to provide a kind of achievable intelligent dimming output, is further dropped
The constant current output high pressure dimming driver of low energy consumption.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of constant current output high pressure light modulation
Driver, it is characterised in that：Including EMI circuits, rectification circuit, pfc circuit, buck circuits, output rectification circuit, dim signal
Input circuit, one-chip computer module and adjusting control circuit, the input terminal input AC alternating current of the EMI circuits, the EMI electricity
The output end on road and the input terminal of rectification circuit connect, and the output end of the rectification circuit and the input terminal of the pfc circuit connect
Connect, the output end of the pfc circuit is connect with the input terminal of the buck circuits, the output end of the buck circuits with it is described defeated
Go out rectification circuit input end connection, the output end of the output rectification circuit is divided into two parts, and a part is driven as the light modulation
The output end of dynamic device circuit, another part are used to need the module powered to provide working power in the driver；The tune
The input of optical signal input circuit terminates dim signal, output end and the one-chip computer module of the dim signal input circuit
Input terminal；Control signal of the control output end of the one-chip computer module through the adjusting control circuit Yu the buck circuits
Input terminal connects.
It is using advantageous effect caused by above-mentioned technical proposal：The 127V or 220V AC voltage obtained from alternating current,
By EMI circuits, the effect of EMI circuits is to filter out the various interference signals inputted by power grid, prevents power switch circuit from being formed
High frequency disturb and alter power grid；Then pass through rectification circuit, become DC voltage supply pfc circuit, pfc circuit generates a 100KHz
High-frequency PWM signal provides a stable 400V DC voltage by PFC rectifier diodes for buck circuits；Buck circuits and
High frequency transformer provides variable an output AC voltage and electric current；Output high voltage is converted into height by output rectification circuit
Press DC voltage；One-chip computer module detects dim signal variation, is changed to the reference voltage of adjusting control circuit, to control
The size of the voltage and current of output, because circuit is rectification output, output voltage can be accomplished within 400VDC, may be implemented
Output voltage is dimmed in 5-380VDC.
Description of the drawings
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the functional block diagram of driver described in the utility model embodiment；
Fig. 2 is the circuit diagram of driver described in the utility model embodiment.
Specific implementation mode
With reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that and described embodiment is only a part of the embodiment of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Many details are elaborated in the following description in order to fully understand the utility model, but this practicality is new
Type can also be implemented using other different from other manner described here, and those skilled in the art can be without prejudice to this reality
With doing similar popularization in the case of novel intension, therefore the utility model is not limited by following public specific embodiment.
As shown in Figure 1, the utility model embodiment discloses a kind of constant current output high pressure dimming driver, including EMI electricity
Road, rectification circuit, pfc circuit, buck circuits, output rectification circuit, dim signal input circuit, one-chip computer module and light modulation
Control circuit.The input terminal input AC alternating current of the EMI circuits, the input of the output end and rectification circuit of the EMI circuits
End connection, the output end of the rectification circuit are connect with the input terminal of the pfc circuit, the output end of the pfc circuit and institute
The input terminal connection of buck circuits is stated, the output end of the buck circuits is connect with the output rectification circuit input terminal, described
The output end of output rectification circuit is divided into two parts, output end of the part as the dimming driver circuit, another part
For to need the module powered to provide working power in the driver；The input termination of the dim signal input circuit is adjusted
Optical signal, the input terminal of the output end and the one-chip computer module of the dim signal input circuit；The one-chip computer module
Control output end is connect through the adjusting control circuit with the control signal input of the buck circuits.
Fig. 2 is the circuit diagram of driver described in the utility model embodiment.
The 127V or 220V AC voltage obtained from alternating current, by EMI circuits, the effect of EMI circuits is filtered out by power grid
The various interference signals of input prevent the high frequency that power switch circuit is formed from disturbing and alter power grid；Then pass through rectification circuit, become straight
Galvanic electricity pressure supply pfc circuit, pfc circuit generate a 100KHz high-frequency PWM signal, are buck electricity by PFC rectifier diodes
Road provides a stable 400V DC voltage；Buck circuits and high frequency transformer provide a variable output AC voltage and
Electric current；Output high voltage is converted into high-voltage dc voltage by output rectification circuit；One-chip computer module detects dim signal variation,
The reference voltage of adjusting control circuit is changed, come control output voltage and current size because circuit is rectification
Output, output voltage can be accomplished within 400VDC, and output voltage may be implemented and dimmed in 5-380VDC.
Claims (1)
1. a kind of constant current output high pressure dimming driver, it is characterised in that：Including EMI circuits, rectification circuit, pfc circuit, buck
Circuit, output rectification circuit, dim signal input circuit, one-chip computer module and adjusting control circuit, the EMI circuits it is defeated
Enter to hold input AC alternating current, the output end of the EMI circuits and the input terminal of rectification circuit to connect, the output of the rectification circuit
End is connect with the input terminal of the pfc circuit, and the output end of the pfc circuit is connect with the input terminal of the buck circuits, institute
The output end for stating buck circuits is connect with the output rectification circuit input terminal, and the output end of the output rectification circuit is divided into two
Part, output end of the part as the dimming driver circuit, another part are used to need to power in the driver
Module provide working power；The input of the dim signal input circuit terminates dim signal, the dim signal input electricity
The input terminal of the output end on road and the one-chip computer module；The control output end of the one-chip computer module is through brightness adjustment control electricity
Road is connect with the control signal input of the buck circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682196.2U CN207911069U (en) | 2017-12-06 | 2017-12-06 | Constant current output high pressure dimming driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682196.2U CN207911069U (en) | 2017-12-06 | 2017-12-06 | Constant current output high pressure dimming driver |
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| Publication Number | Publication Date |
|---|---|
| CN207911069U true CN207911069U (en) | 2018-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721682196.2U Active CN207911069U (en) | 2017-12-06 | 2017-12-06 | Constant current output high pressure dimming driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040603A (en) * | 2020-09-25 | 2020-12-04 | 福州大学 | BPSK visible light communication modulation single-stage LED driving circuit and method |
-
2017
- 2017-12-06 CN CN201721682196.2U patent/CN207911069U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040603A (en) * | 2020-09-25 | 2020-12-04 | 福州大学 | BPSK visible light communication modulation single-stage LED driving circuit and method |
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