CN209170706U - A kind of intelligent LED light adjusting circuit that voltage follows automatically - Google Patents
A kind of intelligent LED light adjusting circuit that voltage follows automatically Download PDFInfo
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- CN209170706U CN209170706U CN201821476766.7U CN201821476766U CN209170706U CN 209170706 U CN209170706 U CN 209170706U CN 201821476766 U CN201821476766 U CN 201821476766U CN 209170706 U CN209170706 U CN 209170706U
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Abstract
The intelligent LED light adjusting circuit that kind voltage follows automatically, including inverse-excitation type constant current constant voltage Switching Power Supply, sampling front-end circuit, MCU controller and load circuit, for the input terminal of the inverse-excitation type constant current constant voltage Switching Power Supply for being electrically connected with city, output end and at least two load circuits being connected in parallel with each other are connected to form current supply circuit；The load circuit is made of the LED lamp bead and metal-oxide-semiconductor being serially connected, the MCU controller is extremely connected to control the on-off of load circuit with the G of metal-oxide-semiconductor, the intelligent LED light adjusting circuit that the voltage of the utility model follows automatically can realize the load voltage Auto-matching to multiple load circuits parallel with one another each load circuit within the scope of certain voltage, and brightness regulation to LED lamp bead can be completed, compared with tradition light modulation, the matched light modulation interval range of LED lamp bead and power supply is wider, it is not in that light modulation is uneven, the drawbacks such as not comprehensive, and it can be controlled by automatic mode, it does not need manually to match.
Description
Technical field
The utility model relates to LED drive circuit fields, and in particular to a kind of intelligent LED that voltage follows automatically light modulation electricity
Road.
Background technique
Currently, LED drive power is that power supply supply is converted to specific voltage and current to turn with the power supply for driving LED luminous
Parallel operation, under normal conditions: the input of LED drive power include high pressure industrial frequency AC (i.e. alternating current), low-voltage direct, high voltage direct current,
Low-voltage high-frequency exchanges (output of such as electronic transformer).
The output of LED drive power on the market is then most of to change voltage for that can change with LED forward drop value
Constant current source.However the brightness of the constant current source is unadjustable, light modulation lower with the LED lamp bead matching degree of different batches
Narrow range, dimming process need worker operation to be matched, and are easy to appear the non-uniform phenomenon of light modulation.
Utility model content
The utility model in order to solve the above problems existing in the present technology, provides a kind of intelligence that voltage follows automatically
LED light adjusting circuit, lower to solve existing LED power and LED lamp bead matching degree, dimming scope is narrow, and dimming process needs worker
The technical issues of operation is matched, and light modulation non-uniform phenomenon is easy to appear.
To achieve the above object, the utility model provides a kind of intelligent LED light adjusting circuit that voltage follows automatically, including
Inverse-excitation type constant current constant voltage Switching Power Supply, sampling front-end circuit, MCU controller and load circuit, the inverse-excitation type constant current constant voltage are opened
For being electrically connected with city, output end is connected at least two load circuits being connected in parallel with each other with shape the input terminal in powered-down source
At current supply circuit；The load circuit is made of the LED lamp bead and metal-oxide-semiconductor being serially connected, the G of the MCU controller and metal-oxide-semiconductor
Extremely it is connected to control the on-off of load circuit；Shown sampling front-end is electrically connected to inverse-excitation type constant current constant voltage Switching Power Supply and MCU
Between controller, with the output voltage for sampling inverse-excitation type constant current constant voltage Switching Power Supply and it is transferred to MCU controller, it is described
MCU controller is connected with inverse-excitation type constant current constant voltage Switching Power Supply with the sampled signal for feedback sample front-end circuit, to pass through
PWM control metal-oxide-semiconductor realizes the adjusting exported to inverse-excitation type constant current constant voltage Switching Power Supply.
As the further preferred technical solution of the utility model, the metal-oxide-semiconductor is NMOS tube or PMOS tube.
As the further preferred technical solution of the utility model, when the metal-oxide-semiconductor is PMOS tube, one end of LED lamp bead
It is connected with the anode of inverse-excitation type constant current constant voltage switched power output, the other end is connect with the pole S of the PMOS tube, PMOS tube
The pole D is connected or is grounded with the cathode of inverse-excitation type constant current constant voltage switched power output.
As the further preferred technical solution of the utility model, when the metal-oxide-semiconductor is NMOS tube, the D of the PMOS tube
Pole is connected with the anode of inverse-excitation type constant current constant voltage switched power output, and the pole S is connected with one end of LED lamp bead, LED lamp bead
The other end is connected or is grounded with the cathode of inverse-excitation type constant current constant voltage switched power output.
As the further preferred technical solution of the utility model, first resistor and second are additionally provided in the load circuit
Resistance, the first resistor are connected in the circuit where LED lamp bead and metal-oxide-semiconductor, and the second resistance is connected on MCU controller
Between the pole G of metal-oxide-semiconductor.
As the further preferred technical solution of the utility model, FLASH memory module is equipped in the MCU controller,
The FLASH memory module is for storing PWM count evidence.
The intelligent LED light adjusting circuit that the voltage of the utility model follows automatically can achieve it is following the utility model has the advantages that
The intelligent LED light adjusting circuit that the voltage of the utility model follows automatically, by including that inverse-excitation type constant current constant voltage switchs
The input terminal of power supply, sampling front-end circuit, MCU controller and load circuit, the inverse-excitation type constant current constant voltage Switching Power Supply is used for
It is electrically connected with city, output end and at least two load circuits being connected in parallel with each other are connected to form current supply circuit；It is described negative
It carries circuit to be made of the LED lamp bead and metal-oxide-semiconductor being serially connected, the MCU controller is extremely connected to control load with the G of metal-oxide-semiconductor
The on-off of circuit；Shown sampling front-end is electrically connected between inverse-excitation type constant current constant voltage Switching Power Supply and MCU controller, to be used for
It samples the output voltage of inverse-excitation type constant current constant voltage Switching Power Supply and is transferred to MCU controller, the MCU controller and inverse-excitation type are permanent
It flows constant pressure Switching Power Supply to be connected with the sampled signal for feedback sample front-end circuit, be realized with controlling metal-oxide-semiconductor by PWM to anti-
Swash the adjusting of formula constant current constant voltage Switching Power Supply output.So that the utility model can pass through external sampling front-end circuit sampling inverse-excitation type
Constant current constant voltage switch power source output voltage, and by pulse width modulation to inverse-excitation type constant current constant voltage switch power source output voltage into
Row is adjusted, and reaches between multiple LED lamp beads parallel with one another the Auto-matching within the scope of certain voltage, and can complete to LED light
The brightness regulation of pearl, compared with tradition light modulation, the matched light modulation interval range of LED lamp bead and power supply is wider, is not in adjust
Light is uneven, the drawbacks such as not comprehensive, and can be controlled by automatic mode, does not need manually to match.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the structural schematic diagram for the example that the intelligent LED light adjusting circuit that the utility model voltage follows automatically provides；
Fig. 2 is the structural representation for another example that the intelligent LED light adjusting circuit that the utility model voltage follows automatically provides
Figure；
Fig. 3 is the light modulation flow chart for the intelligent LED light adjusting circuit that the utility model voltage follows automatically.
In figure: 101, inverse-excitation type constant current constant voltage Switching Power Supply, 102, sampling front-end circuit, 103, MCU controller, 104,
LED lamp bead, 105, metal-oxide-semiconductor.
The utility model aim is realized, the embodiments will be further described with reference to the accompanying drawings for functional characteristics and advantage.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the utility model is described further.In preferred embodiment
Cited such as "upper", "lower", "left", "right", " centre " and " one " term, only being illustrated convenient for narration, rather than to
The enforceable range of the utility model is limited, relativeness is altered or modified, under the content of no substantial changes in technology, when also
It is considered as the enforceable scope of the utility model.
As depicted in figs. 1 and 2, the intelligent LED light adjusting circuit that voltage follows automatically includes inverse-excitation type constant current constant voltage switch electricity
Source 101, sampling front-end circuit 102, MCU controller 103 and load circuit, the inverse-excitation type constant current constant voltage Switching Power Supply 101
For being electrically connected with city, output end and at least two load circuits being connected in parallel with each other are connected to form and power back input terminal
Road；The load circuit is made of the LED lamp bead 104 and metal-oxide-semiconductor 105 being serially connected, the MCU controller 103 and metal-oxide-semiconductor
105 G is extremely connected to control the on-off of load circuit；Shown sampling front-end circuit 102 is connected to inverse-excitation type constant current constant voltage switch
Between power supply 101 and MCU controller 103, with the output voltage for sampling inverse-excitation type constant current constant voltage Switching Power Supply 101 and transmission
To MCU controller 103, the MCU controller 103 is connected for feedback sample with inverse-excitation type constant current constant voltage Switching Power Supply 101
The sampled signal of front-end circuit 102, it is defeated to inverse-excitation type constant current constant voltage Switching Power Supply 101 to control the realization of metal-oxide-semiconductor 105 by PWM
Adjusting out.
In specific implementation, the metal-oxide-semiconductor 105 is NMOS tube 105 or PMOS tube 105.
In specific implementation, as shown in Figure 1, when the metal-oxide-semiconductor 105 is PMOS tube 105, one end of LED lamp bead 104 and flyback
The anode of 101 output end of formula constant current constant voltage Switching Power Supply is connected, and the other end is connect with the pole S of the PMOS tube 105, PMOS tube
105 pole D is connected or is grounded with the cathode of 101 output end of inverse-excitation type constant current constant voltage Switching Power Supply.
In specific implementation, as shown in Fig. 2, when the metal-oxide-semiconductor 105 is NMOS tube 105, the pole D of the PMOS tube 105 and anti-
The anode for swashing 101 output end of formula constant current constant voltage Switching Power Supply is connected, and the pole S is connected with one end of LED lamp bead 104, LED lamp bead
104 other end is connected or is grounded with the cathode of 101 output end of inverse-excitation type constant current constant voltage Switching Power Supply.
In specific implementation, first resistor and second resistance are additionally provided in the load circuit, the first resistor is connected on
In circuit where LED lamp bead 104 and metal-oxide-semiconductor 105, the second resistance is connected on the G of MCU controller 103 Yu metal-oxide-semiconductor 105
Between pole.
In specific implementation, FLASH memory module is equipped in the MCU controller 103, the FLASH memory module is used for
Store PWM count evidence.
In the intelligent LED light adjusting circuit that the voltage of the utility model follows automatically, alternating current is switched through inverse-excitation type constant current constant voltage
Power supply 101, output constant current constant pressure are loaded into the load circuit being serially connected, and the on-off of MOS is controlled by MCU controller 103
It controls to realize with load situation (load circuit being serially connected simultaneously closes off, or opens simultaneously), and samples under different situations
The variation of load voltage.To with carrying and sampled, calculated without the voltage of load, and modulated by pulse width and right
101 output voltage of inverse-excitation type constant current constant voltage Switching Power Supply is controlled, when finding out with load most matched voltage, by tabling look-up
Out PWM count at this time according to and store and arrive FLASH, with it is to be controlled when use, and program factory only runs primary, can be completed
The matching of LED light modulation.Wherein, the function of inverse-excitation type constant current constant voltage Switching Power Supply 101 mainly provides power supply for load circuit, adopts
Sample front-end circuit 102 is used to sample the output voltage of inverse-excitation type constant current constant voltage Switching Power Supply 101, in dimming process, MCU controller
103, which control metal-oxide-semiconductor 105 by PWM, realizes the adjusting exported to Switching Power Supply.
The utility model can be realized inverse-excitation type constant current constant voltage Switching Power Supply 101 within the scope of certain voltage, can match not
Same LED lamp bead 104 can achieve the function of automatic adjustment LED lamp bead 104, effectively improve the stability of light source.Using this
Automatic dimming function, the Auto-matching of LED lamp bead 104 and power supply, light modulation interval range is wider, is not in that light modulation is uneven,
The drawbacks such as not comprehensive, and do not need manually to match.Solve by different manufacturers and different batches production LED lamp bead 104 because
The difference of parameter, the load voltage and the unmatched problem of output voltage of generation, so that inverse-excitation type constant current constant voltage Switching Power Supply 101
Output voltage and load voltage matching degree are higher, reach that LED stroboscopic is low, and brightness uniformity, the brightness of different batches LED light is same
Reach consistent function under a power supply.
In order to allow those skilled in the art to more fully understand and realize the technical solution of the utility model, below with double negative
For carrying circuit, the light modulation process of the utility model is described in detail:
As shown in figure 3, in Fig. 3, ADJ is the abbreviation of sampling front-end circuit 102, load circuit include the first load circuit and
Second load circuit, MOS1 are the metal-oxide-semiconductor 105 of the first load circuit, and MOS2 is the metal-oxide-semiconductor 105 of the second load circuit, V1 the
The load voltage of one load circuit, V2 are the load voltage of the second load circuit.Band is carried in dimming process and without load feelings
Voltage when condition is sampled, is calculated, and by permanent in pulse width modulation and inverse-excitation type constant current constant voltage Switching Power Supply 101
Pressure constant current IC controls electric power output voltage, and when finding out with load most matched voltage, MCU controller 103 is by tabling look-up
It obtains PWM count evidence at this time and stores to FLASH, used when to be controlled, and only operation is primary for program factory, can be completed
The matching of LED light modulation.
Although those skilled in the art should manage the foregoing describe specific embodiment of the present utility model
Solution, these are merely examples, various changes or modifications can be made to present embodiment, without departing from the original of the utility model
Reason and essence, the protection scope of the utility model are only limited by the claims that follow.
Claims (6)
1. a kind of intelligent LED light adjusting circuit that voltage follows automatically, which is characterized in that switch electricity including inverse-excitation type constant current constant voltage
Source, sampling front-end circuit, MCU controller and load circuit, the input terminal of the inverse-excitation type constant current constant voltage Switching Power Supply be used for
City is electrically connected, and output end and at least two load circuits being connected in parallel with each other are connected to form current supply circuit；The load
Circuit is made of the LED lamp bead and metal-oxide-semiconductor being serially connected, and the MCU controller is extremely connected to control load electricity with the G of metal-oxide-semiconductor
The on-off on road；Shown sampling front-end is electrically connected between inverse-excitation type constant current constant voltage Switching Power Supply and MCU controller, for adopting
The output voltage of sample inverse-excitation type constant current constant voltage Switching Power Supply is simultaneously transferred to MCU controller, the MCU controller and inverse-excitation type constant current
Constant pressure Switching Power Supply is connected with the sampled signal for feedback sample front-end circuit, is realized with controlling metal-oxide-semiconductor by PWM to flyback
The adjusting of formula constant current constant voltage Switching Power Supply output.
2. the intelligent LED light adjusting circuit that voltage according to claim 1 follows automatically, which is characterized in that the metal-oxide-semiconductor is
NMOS tube or PMOS tube.
3. the intelligent LED light adjusting circuit that voltage according to claim 2 follows automatically, which is characterized in that the metal-oxide-semiconductor is
When PMOS tube, one end of LED lamp bead is connected with the anode of inverse-excitation type constant current constant voltage switched power output, the other end with it is described
The pole S of PMOS tube connects, and the pole D of PMOS tube is connected or is grounded with the cathode of inverse-excitation type constant current constant voltage switched power output.
4. the intelligent LED light adjusting circuit that voltage according to claim 2 follows automatically, which is characterized in that the metal-oxide-semiconductor is
When NMOS tube, the pole D of the PMOS tube is connected with the anode of inverse-excitation type constant current constant voltage switched power output, the pole S and LED light
One end of pearl is connected, and the other end of LED lamp bead is connected or is grounded with the cathode of inverse-excitation type constant current constant voltage switched power output.
5. the intelligent LED light adjusting circuit that voltage according to claim 3 or 4 follows automatically, which is characterized in that the load
It is additionally provided with first resistor and second resistance in circuit, the first resistor is connected in the circuit where LED lamp bead and metal-oxide-semiconductor,
The second resistance is connected between MCU controller and the pole G of metal-oxide-semiconductor.
6. the intelligent LED light adjusting circuit that voltage according to claim 5 follows automatically, which is characterized in that the MCU control
FLASH memory module is equipped in device, the FLASH memory module is for storing PWM count evidence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821476766.7U CN209170706U (en) | 2018-09-10 | 2018-09-10 | A kind of intelligent LED light adjusting circuit that voltage follows automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821476766.7U CN209170706U (en) | 2018-09-10 | 2018-09-10 | A kind of intelligent LED light adjusting circuit that voltage follows automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209170706U true CN209170706U (en) | 2019-07-26 |
Family
ID=67330921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201821476766.7U Active CN209170706U (en) | 2018-09-10 | 2018-09-10 | A kind of intelligent LED light adjusting circuit that voltage follows automatically |
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| CN (1) | CN209170706U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112637991A (en) * | 2019-09-20 | 2021-04-09 | 台达电子工业股份有限公司 | Power supply applied to light emitting diode and operation method thereof |
-
2018
- 2018-09-10 CN CN201821476766.7U patent/CN209170706U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112637991A (en) * | 2019-09-20 | 2021-04-09 | 台达电子工业股份有限公司 | Power supply applied to light emitting diode and operation method thereof |
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