CN208434147U - Constant current output control circuit and LED matrix for LED light illumination driving - Google Patents
Constant current output control circuit and LED matrix for LED light illumination driving Download PDFInfo
- Publication number
- CN208434147U CN208434147U CN201820827535.XU CN201820827535U CN208434147U CN 208434147 U CN208434147 U CN 208434147U CN 201820827535 U CN201820827535 U CN 201820827535U CN 208434147 U CN208434147 U CN 208434147U
- Authority
- CN
- China
- Prior art keywords
- led light
- constant current
- control circuit
- constant
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model belongs to electronic circuit technology field, provides constant current output control circuit and LED matrix for LED light illumination driving, after rectifying by the AC signal that rectification module exports AC power source, exports direct current signal；And by control module according to the direct current signal, control signal is charged and exported to capacitor to drive LED light string, and detects and control the electric current for flowing through LED light string.It is thus achieved that using few device, the effect of constant current driving can be carried out to LED light string, it reduces circuit cost and its driving method efficiency is higher, solving existing LED light illumination actuation techniques, there is inefficiency, the more problems for leading to circuit complexity of circuit components.
Description
Technical field
The utility model belongs to electronic circuit technology field, more particularly, to the constant current output control of LED light illumination driving
Circuit and LED matrix processed.
Background technique
In recent years, with the development of LED light lighting engineering, various actuation techniques emerge one after another, but with application
The continuous expansion in field, the requirement for driving is also more and more special, such as: size, transfer efficiency and other demands
Etc., all receive corresponding constraint.Meanwhile factors appear in certain LED light lighting areas when cost sensitivity, circuit be reliable etc.
When, although existing drive some circuits itself more outstanding, for cost problem, contain perceptual original part and excessive electricity
Solution capacitive device still can not be avoided；And some circuits are fairly simple, directly adopt Linear Driving replacement, disadvantage is conversion effect
Rate is low, and meeting power loss is on current limiting device.
Therefore, there is inefficiency for existing LED light illumination actuation techniques, and circuit components are more to cause circuit complicated
The problem of.
Utility model content
The purpose of this utility model is to provide for LED light illumination driving constant current output control circuit and LED matrix,
Aiming to solve the problem that existing LED light illumination actuation techniques, there is inefficiency, and circuit components are more to cause circuit is complicated to ask
Topic.
The utility model first aspect provides a kind of constant current output control circuit for LED light illumination driving, including
Capacitor and LED light string, the constant current output control circuit further include:
AC power source is connect, after the AC signal for exporting to the AC power source rectifies, exports direct current signal
Rectification module；
It is connected with the rectification module, for the capacitor being charged and being exported control according to the direct current signal
Signal processed detects and controls the control module for flowing through the electric current of the LED light string to drive the LED light string.
The utility model second aspect provides a kind of LED matrix, including capacitor, LED light string and AC power source, described
LED matrix further includes constant current output control circuit as described above
Constant current output control circuit and LED matrix provided by the utility model for LED light illumination driving, passes through rectification
After the AC signal that module exports AC power source rectifies, direct current signal is exported；And by control module according to the direct current
Signal is charged and is exported control signal to capacitor to drive LED light string, and detects and control the electric current for flowing through LED light string.
It is thus achieved that using few device, the effect of constant current driving can be carried out to LED light string, reduce circuit cost and its
Driving method efficiency is higher, solves existing LED light illumination actuation techniques there is inefficiency, circuit components are more to lead
Send a telegraph the problem of road complexity.
Detailed description of the invention
Fig. 1 is that the modular structure of the constant current output control circuit provided by the utility model for LED light illumination driving is shown
It is intended to.
Fig. 2 is the exemplary circuit figure of the constant current output control circuit provided by the utility model for LED light illumination driving.
Fig. 3 is that AC power source is defeated in the constant current output control circuit provided by the utility model for LED light illumination driving
The waveform diagram of AC signal out.
Fig. 4 is AC signal warp in the constant current output control circuit provided by the utility model for LED light illumination driving
Waveform diagram after over commutation.
Fig. 5 is control module in the constant current output control circuit provided by the utility model for LED light illumination driving
Cellular construction schematic diagram.
Fig. 6 is control module in the constant current output control circuit provided by the utility model for LED light illumination driving
Examples of circuits figure.
Fig. 7 is that control module is each in the constant current output control circuit provided by the utility model for LED light illumination driving
The waveform diagram of the important node of a part.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The above-mentioned constant current output control circuit and LED matrix for LED light illumination driving, can not be dashed forward using capacitance voltage
The characteristic of change forms one using constant-current charge, constant current detection and based on capacitor charge and discharge, and can realize constant current output.It is first
First, ac input end input AC is electric (90-265V AC, 50/60Hz), and by full-wave rectification, formation one does not filter straight
Galvanic electricity；Then charging is carried out to external capacitor by internal high-voltage constant-current circuit and phase is carried out to external LED light string
The power supply answered；And sampling resistor voltage is detected to realize the constant of output electric current, to realize that LED illumination constant current drives.Thus
Few device can be used by realizing, the effect that can be driven to LED illumination constant current.
Fig. 1 shows the module knot of the constant current output control circuit provided by the utility model for LED light illumination driving
Structure, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
A kind of above-mentioned constant current output control circuit for LED light illumination driving, including capacitor C1 and LED light string 104, should
Constant current output control circuit further includes rectification module 102 and control module 103.
Rectification module 102 connects AC power source 101, defeated after the AC signal for exporting to AC power source 101 rectifies
Direct current signal out.
Control module 103 is connected with rectification module 102, for according to direct current signal, carries out charging and defeated to capacitor C1
Control signal is out to drive LED light string 104, and detects and control the electric current for flowing through LED light string 104.
As an embodiment of the present invention, the voltage range that above-mentioned AC power source 101 exports is 90-265V, and frequency is
50/60Hz。
As an embodiment of the present invention, above-mentioned control module 103 is according to the direct current signal after rectification, on the one hand to electricity
Hold C1 to charge, on the other hand output control signal is to drive LED light string；Meanwhile synchronous detection flows through LED light string 104
Electric current will do it electric discharge after capacitor C1 is fully charged, and therefore, control module 103 can flow through LED light string 104 according to detecting
The control signal of current regulation itself output, to further ensure that the electric current for flowing through LED light string 104 is continuously in preset threshold,
Realize LED illumination constant current driving.
Fig. 2 shows the example electricity of the constant current output control circuit provided by the utility model for LED light illumination driving
Road, Fig. 3 and Fig. 4 are respectively illustrated to be handed in the constant current output control circuit provided by the utility model for LED light illumination driving
The AC signal and the waveform diagram after over commutation of galvanic electricity source output illustrate only and the present embodiment for ease of description
Relevant part, details are as follows:
As an embodiment of the present invention, above-mentioned rectification module 102 include first diode D1, the second diode D2,
Third diode D3 and the 4th diode D4；
The cathode of first diode D1 connects the anode of the second diode D2, and the anode of first diode D1 connects third diode
The anode of D3, the cathode of the second diode D2 connect the cathode of the 4th diode D4, and the cathode of third diode D3 connects the four or two pole
The anode of pipe D4.
Specifically, above-mentioned rectification module 102 is realized by the mode of full-bridge rectification, certainly, Half bridge rectifier can also be used
Mode realize.
Fig. 5 shows in the constant current output control circuit provided by the utility model for LED light illumination driving and controls mould
The cellular construction of block, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned control module 103 includes impulse generator 1033, constant-current control unit
1031, shaping unit 1032 and first switch tube Q1 are sampled；
The input of constant-current control unit 1031 terminates rectification module 102, the output termination first of constant-current control unit 1031
The input terminal of switching tube Q1, impulse generator 1033 are connected with sampling shaping unit 1032, sample the defeated of shaping unit 1032
Enter end for detecting the electric current for flowing through LED light string 104, the output termination first switch tube Q1's of sampling shaping unit 1032 is controlled
End, the output end of first switch tube Q1 is for being charged and being exported control signal to capacitor C1 to drive LED light string 104.
Specifically, above-mentioned first switch tube Q1 is field-effect tube or triode；
Grid, drain electrode and the source electrode of field-effect tube are respectively the controlled end, input terminal and output of first switch tube Q1
End；
Base stage, collector and the emitter of triode are respectively the controlled end of first switch tube Q1, input terminal and defeated
Outlet.
Fig. 6 shows in the constant current output control circuit provided by the utility model for LED light illumination driving and controls mould
The exemplary circuit of block, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned constant-current control unit 1031 includes that constant current comparator COM2 and second is opened
Close pipe Q2；
The normal phase input end of constant current comparator COM2 accesses reference voltage Vref, the inverting input terminal of constant current comparator COM2
It is connect altogether with the output end of second switch Q2 and the output end as constant-current control unit 1031, the output of constant current comparator COM2
The controlled end of second switch Q2 is terminated, the input terminal of second switch Q2 is the input terminal of constant-current control unit 1031.
Specifically, above-mentioned second switch Q2 is field-effect tube or triode；
Grid, drain electrode and the source electrode of field-effect tube are respectively the controlled end, input terminal and output of second switch Q2
End；
Base stage, collector and the emitter of triode are respectively the controlled end of second switch Q2, input terminal and defeated
Outlet.
As an embodiment of the present invention, above-mentioned sampling shaping unit 1032 includes input buffer D1, threshold value comparison
Device COM1 and door AND1 and buffering driver T1；
For the normal phase input end of input buffer D1 for detecting the electric current for flowing through LED light string 104, input buffer D1's is anti-
Phase input terminal connects altogether with the output end of input buffer D1 and the inverting input terminal of threshold comparator COM1, threshold comparator
The normal phase input end of COM1 accesses reference voltage Vref, the output termination and the first input of door AND1 of threshold comparator COM1
End, the second input termination impulse generator 1033 with door AND1, the input with the output termination buffering driver T1 of door AND1
End, the output end of buffering driver T1 are the output end for sampling shaping unit 1032.
Fig. 7 shows in the constant current output control circuit provided by the utility model for LED light illumination driving and controls mould
The waveform of the important node of block various pieces, and Fig. 1-Fig. 6 is combined, to the above-mentioned constant current output for LED light illumination driving
The working principle of control circuit is described as follows:
Firstly, High Level AC Voltage is by after full-bridge rectification, waveform becomes waveform (or the S201 letter in Fig. 7 of Fig. 4 signal
Number)；Then, then it is input to the port HVIN of control module 103, by internal constant-current control unit 1031 and first switch tube
Q1, and being controlled by the waveform (S202 in Fig. 7) that is issued of sampling shaping unit 1032, through VCC to the capacitor C1 of outside into
Row charging, the current waveform of charging are the S203 in Fig. 7.
According to:
It can obtain, VCC raised voltage is almost linear rise, and waveform is shown in the S205 ascent stage in Fig. 7.Meanwhile with voltage
Rising, current non-linear that LED light string 104 passes through increases, and the voltage of CS can also increase in proportion (see the S205 in Fig. 7).
After increasing to the threshold value inside CS, carried out with the waveform (S204 in Fig. 7) that impulse generator 1033 generates
It is corresponding to compare, generate the control signal (S202 in Fig. 7) of control switch pipe.
Constant current switch is turned off, the electric current of LED light string 104 is entirely to be powered by VCC capacitor C1 at this time, at this time VCC voltage
With by the electric current of LED light string 104 can non-linear decline, wait next charge cycle.
The utility model additionally provides LED matrix, including capacitor, LED light string and AC power source, which also wraps
Above-mentioned constant current output control circuit is included, according to capacitor charge and discharge principle, is risen using constant-current charge, capacitance voltage controllable
Etc. advantages, and by detection inspection leakage resistance on voltage, to realize corresponding constant current output.
The advantages of above-mentioned constant current output control circuit and LED matrix for LED light illumination driving, is embodied in:
1) the ac input signal phase sampling circuit of virtual earth.Since control module (chip) itself works in high pressure conditions
Under, chip need to use high-pressure process, and the chip that this programme uses samples for part virtual earth mode, avoids and directly adopt on the spot
Mode Sample AC input signal phase, reduces costs.
2) constant current output under Width funtion.The electric current that LED light string is directly flowed through by sampling, may be implemented constant current under Width funtion
Output, and compared to the chip of other Width funtion constant current outputs, peripheral circuit is simple, if only dry units is needed to can be realized accordingly
Function, BOM are at low cost.
To sum up, the constant current output control circuit and LED dress provided by the embodiment of the utility model for LED light illumination driving
It sets, after rectifying by the AC signal that rectification module exports AC power source, exports direct current signal；And pass through control module
According to the direct current signal, control signal is charged and exported to capacitor to drive LED light string, and detects and control and flow through LED
The electric current of lamp string.It is thus achieved that can carry out the effect of constant current driving to LED light string using few device, reduce electricity
Road cost and its driving method efficiency is higher, solving existing LED light illumination actuation techniques, there is inefficiency, circuits
The more problem for leading to circuit complexity of component.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of constant current output control circuit for LED light illumination driving, including capacitor and LED light string, which is characterized in that institute
State constant current output control circuit further include:
AC power source is connect, after the AC signal for exporting to the AC power source rectifies, exports the rectification of direct current signal
Module；
It is connected with the rectification module, for according to the direct current signal, the capacitor being charged and being exported control letter
Number to drive the LED light string, and detect and control flow through the LED light string electric current control module.
2. constant current output control circuit as described in claim 1, which is characterized in that the control module includes pulse generation
Device, constant-current control unit, sampling shaping unit and first switch tube；
The input of the constant-current control unit terminates the rectification module, the output termination described first of the constant-current control unit
The input terminal of switching tube, the impulse generator are connected with the sampling shaping unit, the input of the sampling shaping unit
End for detect the electric current for flowing through the LED light string, the output termination first switch tube of the sampling shaping unit by
End is controlled, the output end of the first switch tube is for being charged and being exported control signal to the capacitor to drive the LED
Lamp string.
3. constant current output control circuit as claimed in claim 2, which is characterized in that the first switch tube be field-effect tube or
Person's triode；
Grid, drain electrode and the source electrode of the field-effect tube are respectively the controlled end of the first switch tube, input terminal and defeated
Outlet；
Base stage, collector and the emitter of the triode be respectively the controlled end of the first switch tube, input terminal and
Output end.
4. constant current output control circuit as claimed in claim 2, which is characterized in that the constant-current control unit includes constant current ratio
Compared with device and second switch；
The normal phase input end of the constant current comparator accesses reference voltage, the inverting input terminal of the constant current comparator and described the
The output end of two switching tubes connects altogether and the output end as the constant-current control unit, and the output of the constant current comparator terminates institute
The controlled end of second switch is stated, the input terminal of the second switch is the input terminal of the constant-current control unit.
5. constant current output control circuit as claimed in claim 4, which is characterized in that the second switch be field-effect tube or
Person's triode；
Grid, drain electrode and the source electrode of the field-effect tube are respectively the controlled end of the second switch, input terminal and defeated
Outlet；
Base stage, collector and the emitter of the triode be respectively the controlled end of the second switch, input terminal and
Output end.
6. constant current output control circuit as claimed in claim 2, which is characterized in that the sampling shaping unit includes that input is slow
Rush device, threshold comparator and door and buffering driver；
The normal phase input end of the input buffer is used to detect the electric current for flowing through the LED light string, the input buffer
Inverting input terminal connects altogether with the output end of the input buffer and the inverting input terminal of the threshold comparator, the threshold value
The normal phase input end of comparator accesses reference voltage, and the output of the threshold comparator terminates the first input end with door,
Second input with door terminates the impulse generator, the input that the buffering driver is terminated with the output of door
End, the output end of the buffering driver are the output end of the sampling shaping unit.
7. a kind of LED matrix, including capacitor, LED light string and AC power source, which is characterized in that the LED matrix further include as
The constant current output control circuit of any one of the claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820827535.XU CN208434147U (en) | 2018-05-30 | 2018-05-30 | Constant current output control circuit and LED matrix for LED light illumination driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820827535.XU CN208434147U (en) | 2018-05-30 | 2018-05-30 | Constant current output control circuit and LED matrix for LED light illumination driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208434147U true CN208434147U (en) | 2019-01-25 |
Family
ID=65101005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820827535.XU Active CN208434147U (en) | 2018-05-30 | 2018-05-30 | Constant current output control circuit and LED matrix for LED light illumination driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208434147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108541111A (en) * | 2018-05-30 | 2018-09-14 | 深圳市明微电子股份有限公司 | Constant current output control circuit, method and LED matrix for LED light illumination driving |
-
2018
- 2018-05-30 CN CN201820827535.XU patent/CN208434147U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108541111A (en) * | 2018-05-30 | 2018-09-14 | 深圳市明微电子股份有限公司 | Constant current output control circuit, method and LED matrix for LED light illumination driving |
| CN108541111B (en) * | 2018-05-30 | 2024-04-02 | 深圳市明微电子股份有限公司 | Constant-current output control circuit and method for LED lamp illumination driving and LED device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101657057B (en) | LED power circuit | |
| CN107529241B (en) | A kind of linear Constant-power LED drive circuit of single hop and method | |
| CN106332390B (en) | A kind of non-isolated LED constant current driving chip, circuit and method | |
| CN102065610B (en) | LED (Light Emitting Diode) lamp control circuit | |
| CN102754531B (en) | Led driving power supply circuit, driving power supply and lighting device | |
| CN103917028B (en) | A kind of LED constant current source and control method thereof | |
| CN202385330U (en) | LED drive circuit | |
| CN106961768B (en) | A kind of LED linear constant-current drive circuit of active valley-fill circuit mode | |
| CN103152895B (en) | The circuit of the direct driving LED of a kind of alternating current | |
| CN102843844A (en) | LED (Light Emitting Diode) control circuit and LED illumination device | |
| CN203814013U (en) | LED driving circuit adopting single-end zero crossing detection | |
| CN103281829B (en) | A kind of LED drive circuit | |
| CN108541111A (en) | Constant current output control circuit, method and LED matrix for LED light illumination driving | |
| CN205793545U (en) | A kind of constant current driver circuit for LED and LED light device | |
| CN208434147U (en) | Constant current output control circuit and LED matrix for LED light illumination driving | |
| CN110505730A (en) | Linear LED drive circuit and the linear LED driving method of full voltage input | |
| CN103152894A (en) | Sectional type LED (light emitting diode) driving circuit based on AC (alternating current) power supply | |
| CN204031524U (en) | A kind of constant current driver circuit for LED | |
| CN103687150B (en) | A kind of without overshoot LED linear constant-current drive circuit | |
| CN106413202B (en) | Primary-side-control LED drive circuit based on SEPIC Yu Flyback circuits | |
| CN103648223A (en) | Multi-channel light-emitting diode (LED) linear driver | |
| CN201663732U (en) | Capacitor transformation circuit of AC 220V LED illuminating lamp | |
| CN203748074U (en) | LED drive circuit based on voltage memory and subsection current limiting | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN106788375A (en) | A kind of no-voltage list live wire wall touch switch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |