CN207665242U - A kind of LED adjusting control circuits - Google Patents
A kind of LED adjusting control circuits Download PDFInfo
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- CN207665242U CN207665242U CN201721795013.8U CN201721795013U CN207665242U CN 207665242 U CN207665242 U CN 207665242U CN 201721795013 U CN201721795013 U CN 201721795013U CN 207665242 U CN207665242 U CN 207665242U
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- led
- inductance
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- oxide
- metal
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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 LED adjusting control circuits, including LED drive chip, metal-oxide-semiconductor Q1, resistance R1 and inductance L1, the grid of the LED drive chip connection metal-oxide-semiconductor Q1, the anode of drain electrode connection the inductance L1 and diode D1 of metal-oxide-semiconductor Q1, cathode connection LED, the resistance R2 of diode D1 and the other end of input power VIN, resistance R2 connect inductance L2 and capacitance C1.The utility model LED adjusting control circuits are without increasing light modulation device, it is only necessary to the switch carried using lamps and lanterns, by repeated switching, to select the brightness of LED.
Description
Technical field
The utility model is related to LED technology field, specifically a kind of LED adjusting control circuits.
Background technology
The concept of energy-saving and emission-reduction, low-carbon environment-friendly is advocated by the whole world.According to statistics, the energy consumption every year in illumination accounts for
The 36% of total losses；And according to environmental demand, the LED light of brightness of illumination is adjusted, energy waste can be greatlyd save.Existing light modulation
Chip, control trouble, with high costs, some will also use complicated light-adjusting module.
Utility model content
The purpose of this utility model is to provide a kind of LED adjusting control circuits, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the utility model provides the following technical solutions：
A kind of LED adjusting control circuits, including LED drive chip, metal-oxide-semiconductor Q1, resistance R1 and inductance L1, the LED drives
The grid of dynamic chip connection metal-oxide-semiconductor Q1, the anode of drain electrode connection the inductance L1 and diode D1 of metal-oxide-semiconductor Q1, the moon of diode D1
The other end that pole connects LED, resistance R2 and input power VIN, resistance R2 connects inductance L2 and capacitance C1, the source electrode of metal-oxide-semiconductor Q1
Resistance R1 and LED drive chip are connected, the anode and inductance L3 of the other end connection comparator U1 of inductance L2, comparator U1's is defeated
Outlet connection timer COUNT, timer COUNT are also connected with logic gate chip logic, and logic gate chip logic is also connected with letter
Number selection chip ref choose, signal behavior chip ref choose are also connected with LED drive chip.
Further technical solution as the utility model：The metal-oxide-semiconductor Q1 is NMOS tube.
Compared with prior art, the utility model has the beneficial effects that：The utility model LED adjusting control circuits are without increasing
Add light modulation device, it is only necessary to the switch carried using lamps and lanterns, by repeated switching, to select the brightness of LED.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Fig. 2 is that oscillogram is realized in light modulation.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Please refer to Fig.1-2, a kind of LED adjusting control circuits, including LED drive chip, metal-oxide-semiconductor Q1, resistance R1 and inductance
L1, the grid of the LED drive chip connection metal-oxide-semiconductor Q1, the anode of drain electrode connection the inductance L1 and diode D1 of metal-oxide-semiconductor Q1,
Cathode connection LED, the resistance R2 of diode D1 and the other end of input power VIN, resistance R2 connect inductance L2 and capacitance C1,
The anode and inductance of the other end connection comparator U1 of the source electrode connection resistance R1 and LED drive chip of metal-oxide-semiconductor Q1, inductance L2
Output end the connection timer COUNT, timer COUNT of L3, comparator U1 are also connected with logic gate chip logic, logic gate core
Piece logic is also connected with signal behavior chip ref choose, signal behavior chip ref choose and is also connected with LED drive chip.
Metal-oxide-semiconductor Q1 is NMOS tube.
The operation principle of the utility model is：As shown in Figure 1, being LED drive chip framework in dotted line frame.Pass through detection stream
The peak point current of inductance is crossed, the conducting dutycycle of inductance is then controlled, to realize the constant purpose of inductance peak point current,
Under CCM patterns, inductance peak point current close to LED light average current, so the electric current for flowing through LED light is constant.
The electric current I=ref/R of LED light；Ref is internal reference voltage, and R1 is sampling resistor.
In order to achieve the purpose that switch dimming, chip compare the partial pressure of VCC voltages (power supply of chip) and internal reference,
After shutdown, VCC first drop to resetting voltage rapidly hereinafter, at this time in addition to dim logic, other module not power consumptions, so
VCC can be maintained, such as 3V；Often shutdown is primary, and the counting module in chip can add one, which is designed as the counting of mould 3,
So after switching on and shutting down three times, the output of counter is returned to original state；Combinational logic is passed through into the output of counter again, then
It goes to select different LED light current constant control benchmark, to reach different output brightness.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (2)
1. a kind of LED adjusting control circuits, including LED drive chip, metal-oxide-semiconductor Q1, resistance R1 and inductance L1, which is characterized in that
The grid of the LED drive chip connection metal-oxide-semiconductor Q1, the anode of drain electrode connection the inductance L1 and diode D1 of metal-oxide-semiconductor Q1, two poles
Cathode connection LED, the resistance R2 of pipe D1 and the other end of input power VIN, resistance R2 connect inductance L2 and capacitance C1, metal-oxide-semiconductor
The anode and inductance L3 of the other end connection comparator U1 of the source electrode connection resistance R1 and LED drive chip of Q1, inductance L2, compare
Output end the connection timer COUNT, timer COUNT of device U1 is also connected with logic gate chip logic, logic gate chip logic
It is also connected with signal behavior chip ref choose, signal behavior chip ref choose and is also connected with LED drive chip.
2. a kind of LED adjusting control circuits according to claim 1, which is characterized in that the metal-oxide-semiconductor Q1 is NMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795013.8U CN207665242U (en) | 2017-12-20 | 2017-12-20 | A kind of LED adjusting control circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795013.8U CN207665242U (en) | 2017-12-20 | 2017-12-20 | A kind of LED adjusting control circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207665242U true CN207665242U (en) | 2018-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721795013.8U Active CN207665242U (en) | 2017-12-20 | 2017-12-20 | A kind of LED adjusting control circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207665242U (en) |
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2017
- 2017-12-20 CN CN201721795013.8U patent/CN207665242U/en active Active
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