CN209659674U - A kind of LED drive power - Google Patents
A kind of LED drive power Download PDFInfo
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- CN209659674U CN209659674U CN201822276097.5U CN201822276097U CN209659674U CN 209659674 U CN209659674 U CN 209659674U CN 201822276097 U CN201822276097 U CN 201822276097U CN 209659674 U CN209659674 U CN 209659674U
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Abstract
A kind of LED drive power, including immunity module, the first rectification filtering module, voltage changing module, the second rectification filtering module, constant flow module, feedback module, sampling module, switch module and drive control module, after carrying out electromagnetism interference, rectification, filtering, voltage transformation, secondary rectification, secondary filtering and constant current processing by the power supply signal sequentially to city's electricity output, to drive LED light, rectification and the filtered power supply signal are acquired by sampling module simultaneously and divided, branch pressure voltage is exported；When branch pressure voltage is zero, drive control module control switch module is connected, and the turn-on time of the feedback signal drive control switch module according to feedback module output.The effect of constant-current driving LED lamp can be realized from there through above-mentioned simple circuit structure, high-efficient and highly reliable, solving the problems, such as existing LED drive power technology, there is circuit structure is complex and inefficiency.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of LED drive power.
Background technique
Currently, LED drive power switching tube is all using field-effect tube and triode as switching tube, however use single-stage
Power can only accomplish 150W hereinafter, if wanting to realize 150W when PFC (Power Factor Correction, PFC)
Above power is needed using PFC+ half-bridge topology, and the circuit structure that this kind of mode designs is complex, low efficiency
Under and power supply cost it is quite high, without the market competitiveness.
Therefore, existing LED drive power technology the problem of there is circuit structure is complex and inefficiency.
Utility model content
The purpose of this utility model is to provide a kind of LED drive powers, it is intended to solve existing LED drive power technology
The problem of there is circuit structure is complex and inefficiency.
The utility model provides a kind of LED drive power, and the LED drive power includes:
Alternating current is accessed, the immunity module of electromagnetism interference is carried out for the power supply signal to city's electricity output；
It is connect with the immunity module, for what the power supply signal after electromagnetism interference was rectified and filtered
First rectification filtering module；
It is connect with the rectification filtering module, for carrying out voltage transformation to rectification and the filtered power supply signal
Voltage changing module；
It is connect with the voltage changing module, for carrying out secondary rectification and secondary filter to the power supply signal after voltage transformation
Second rectification filtering module of wave；
Connect with second rectification filtering module, for it is secondary rectification and secondary filtering after the power supply signal into
After row constant current processing, the constant flow module of LED light is driven；
It is connect with the voltage changing module and second rectification filtering module, for obtaining the power supply after voltage transformation
Signal and the feedback module for exporting feedback signal；
It is connect with first rectification filtering module and the voltage changing module, for acquiring rectification and the filtered electricity
Source signal is simultaneously divided, and the sampling module of branch pressure voltage is exported；
It connect with the voltage changing module and the sampling module, is opened for what is be connected when the branch pressure voltage is zero
Close module；And
It is connect with the feedback module and the switch module, for being switched according to the feedback signal drive control
The drive control module of the turn-on time of module.
A kind of LED drive power provided by the utility model, including immunity module, the first rectification filtering module, transformation
Module, the second rectification filtering module, constant flow module, feedback module, sampling module, switch module and drive control module lead to
Electromagnetism interference, rectification, filtering, voltage transformation, secondary rectification, secondary filtering are carried out after the power supply signal sequentially to city's electricity output
And after constant current processing, to drive LED light, while being gone forward side by side by sampling module acquisition rectification and the filtered power supply signal
Row partial pressure, exports branch pressure voltage；When branch pressure voltage is zero, drive control module control switch module is connected, and according to
The turn-on time of the feedback signal drive control switch module of feedback module output.It is from there through above-mentioned simple circuit structure
The effect of constant-current driving LED lamp can be achieved, it is high-efficient and highly reliable, solve existing LED drive power technology
The problem of there is circuit structure is complex and inefficiency.
Detailed description of the invention
Fig. 1 is a kind of modular structure schematic diagram for LED drive power that an embodiment of the present invention provides.
Fig. 2 is a kind of modular structure schematic diagram for LED drive power that another embodiment of the utility model provides.
Fig. 3 is a kind of examples of circuits figure of LED drive power of corresponding diagram 2.
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.
A kind of above-mentioned LED drive power, including it is immunity module, the first rectification filtering module, voltage changing module, second whole
Filter module, constant flow module, feedback module, sampling module, switch module and drive control module are flowed, by sequentially to alternating current
The power supply signal of output carries out electromagnetism interference, rectification, filtering, voltage transformation, secondary rectification, secondary filtering and constant current processing
Afterwards, it to drive LED light, while by sampling module acquisition rectification and the filtered power supply signal and being divided, is exported
Branch pressure voltage；When branch pressure voltage is zero, drive control module control switch module is connected, and is exported according to feedback module
Feedback signal drive control switch module turn-on time.And switch module includes first capacitor, insulated gate bipolar crystalline substance
Body pipe and the 9th resistance；Second termination insulated gate bipolar of the first termination voltage changing module of first capacitor, first capacitor is brilliant
The output end of body pipe, the controlled termination drive control module of insulated gate bipolar transistor, insulated gate bipolar transistor it is defeated
Enter the first end of the 9th resistance of termination, the second end ground connection of the 9th resistance.It can be real from there through above-mentioned simple circuit structure
The effect of constant-current driving LED lamp is showed, circuit switch uses high voltage bearing insulated gate bipolar transistor IGBT, avoids traditional
Switching tube is used using field-effect tube and triode and is lost caused by absorbing circuit, and the efficiency of power supply is improved.I.e. there is provided
A kind of high efficiency, high PF value, long-life, low cost, high reliability, EMI interfere small, special anti-lightning strike, surge measure, and
Reduce device, improves the LED drive power of lightning protection grade.
Fig. 1 shows a kind of connection structure of LED drive power of an embodiment of the present invention offer, for the ease of saying
Bright, only the parts related to this embodiment are shown, and details are as follows:
A kind of above-mentioned LED drive power, including immunity module 102, the first rectification filtering module 103, voltage changing module
104, the second rectification filtering module 105, constant flow module 106, feedback module 108, sampling module 109, switch module 110 and drive
Dynamic control module 111.
Immunity module 102 accesses alternating current 101, and the power supply signal for exporting to alternating current 101 carries out electromagnetism interference.
First rectification filtering module 103 is connect with immunity module 102, for the power supply signal after electromagnetism interference into
Row rectification and filtering.
Voltage changing module 104 is connect with rectification filtering module 103, for carrying out voltage to rectification and filtered power supply signal
Transformation.
Second rectification filtering module 105 is connect with voltage changing module 104, for carrying out two to the power supply signal after voltage transformation
Secondary rectification and secondary filtering.
Constant flow module 106 is connect with the second rectification filtering module 105, for the power supply after secondary rectification and secondary filtering
After signal carries out constant current processing, to drive LED light 107.
Feedback module 108 is connect with voltage changing module 104 and the second rectification filtering module 105, after obtaining voltage transformation
Power supply signal and export feedback signal.
Sampling module 109 is connect with the first rectification filtering module 103 and voltage changing module 104, for acquiring rectification and filtering
Rear power supply signal is simultaneously divided, and branch pressure voltage is exported.
Switch module 110 is connect with voltage changing module 104 and sampling module 109, for being led when branch pressure voltage is zero
It is logical.
Drive control module 111 is connect with feedback module 108 and switch module 109, for driving control based on the feedback signal
The turn-on time of switch module 110 processed.
As an embodiment of the present invention, above-mentioned constant flow module 106 believes the power supply after secondary rectification and secondary filtering
Number carry out constant current processing be by the control of the current value of power supply signal within a preset range so that the luminous brightness of driving LED light compared with
For stabilization, the phenomenon that avoiding the occurrence of halation or quick-fried sudden strain of a muscle.
As an embodiment of the present invention, when above-mentioned 111 one side of drive control module according to branch pressure voltage is zero, control
Switch module 110 processed is connected；On the other hand the turn-on time of drive control switch module 110 based on the feedback signal.
Fig. 2 shows a kind of connection structure for LED drive power that another embodiment of the utility model provides, for the ease of
Illustrate, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned LED drive power further includes auxiliary power module 113, accessory power supply
Module 113 is connect with alternating current 101 and drive control module 111, for carrying out auxiliary power supply to drive control module 111.
As an embodiment of the present invention, above-mentioned LED drive power further includes Anti-surging module 112, Anti-surging module
112 connect with immunity module 102 and drive control module 111, for acquiring the power supply signal after electromagnetism interference and progress
Anti-surging.
The particular circuit configurations that Fig. 3 shows a kind of LED drive power of corresponding diagram 2 illustrate only for ease of description
Part related to the present embodiment, details are as follows:
As an embodiment of the present invention, above-mentioned first rectification filtering module 103 includes rectifier bridge BD1, the first inductance
L1 and the second capacitor C2；
The input of rectifier bridge BD1 terminates immunity module 102, and the output of rectifier bridge BD1 terminates the first of the first inductance L1
End, the second end of the first inductance L1 connect altogether with the first end of the second capacitor C2 and connect with voltage changing module 104, the second capacitor C2's
Second end ground connection.
As an embodiment of the present invention, above-mentioned voltage changing module 104 includes transformer T1, and transformer T1 includes resonance
High frequency transformer.
As an embodiment of the present invention, above-mentioned sampling module 109 includes second resistance R2, the 4th resistance R4, the 6th
Resistance R6 and the 8th resistance R8；
The first termination voltage changing module 104 of second resistance R2, the first of the second the 4th resistance R4 of termination of second resistance R2
End, the first end of the second the 6th resistance R6 of termination of the 4th resistance R4, the of the second end of the 6th resistance R6 and the 8th resistance R8
One end connects altogether and connect with drive control module 111, the second end ground connection of the 8th resistance R8.
As an embodiment of the present invention, above-mentioned switch module 110 includes first capacitor C1, insulated gate bipolar crystal
Pipe IGBT and the 9th resistance R9；
The first termination voltage changing module 104 of first capacitor C1, the second termination insulated gate bipolar crystal of first capacitor C1
The output end of pipe IGBT, the controlled termination drive control module 111 of insulated gate bipolar transistor IGBT, insulated gate bipolar are brilliant
The first end of the 9th resistance R9 of input termination of body pipe IGBT, the second end ground connection of the 9th resistance R9.
Specifically, resonance is occurred by the leakage inductance of first capacitor C1 (resonant capacitance) and resonance high-frequency isolation transformer, adjusted
The size of whole resonant capacitance and resonance high-frequency isolation transformer makes resonance point minimum voltage resonance to zero volt, when resonance to zero volt
When conducting insulated gate bipolar transistor npn npn IGBT, realize Sofe Switch function, reduce switching damage, improve power-efficient, subtract
The generation of few EMI.This circuit switch uses high voltage bearing IGBT, and traditional switching tube is avoided to make using field-effect tube and triode
It is lost caused by absorbing circuit, improves the efficiency of power supply.
As an embodiment of the present invention, above-mentioned drive control module 111 include programmable pulse control chip U1 and
Driving chip U2；
The first controlled end I/O2 of programmable pulse control chip U1 connects feedback module 108, and programmable pulse controls chip
The second controlled end I/O3 of U1 connects sampling module 109, and programmable pulse controls the defeated of the output termination driving chip U2 of chip U1
Enter end (In1 and In2), the output end Out of driving chip U2 connects switch module 110.
As an embodiment of the present invention, above-mentioned Anti-surging module 112 includes first resistor R1,3rd resistor R3, the
Five resistance R5 and the 7th resistance R7；
The first termination immunity module 102 of first resistor R1, the of the second termination 3rd resistor R3 of first resistor R1
One end, the first end of the second the 5th resistance R5 of termination of 3rd resistor R3, the second end of the 5th resistance R5 is with the 7th resistance R7's
First end connects altogether and connect with drive control module 111, the second end ground connection of the 7th resistance R7.
As an embodiment of the present invention, above-mentioned immunity module 102 uses existing EMI (Electro
Magnetic Interference, electromagnetic interference) circuit realization.
As an embodiment of the present invention, above-mentioned second rectification filtering module 105 uses existing current rectifying and wave filtering circuit
It realizes.
As an embodiment of the present invention, above-mentioned constant flow module 106 is realized using existing constant-current circuit.
As an embodiment of the present invention, above-mentioned feedback module 108 is realized using existing feed circuit.
As an embodiment of the present invention, above-mentioned auxiliary power module 113 includes battery, and battery is to pass through reception
The power supply signal of the output of alternating current 101 is simultaneously stored, and is then discharged to carry out auxiliary power supply to drive control module 111.
A kind of above-mentioned working principle of LED drive power is described below in conjunction with Fig. 1-Fig. 3:
Alternating current 101 is filtered EMI interference by immunity module 102, is carried out using rectifier bridge BD1 by L, the access of N line
Then rectification provides resonant frequencies transformer-supplied after the first inductance L1 and the second capacitor C2 filtering；
Auxiliary power module 113 provides programmable pulse control chip U1 and driving chip U2 power supply, driving chip U2 control
Insulated gate bipolar transistor IGBT processed turns on and off, and opening for insulated gate bipolar transistor IGBT is by zero passage detection
Sample resistance control is taken when detecting the C pole tension of insulated gate bipolar transistor IGBT close to zero by zero passage detection
The sample resistance of sample divides, and when branch pressure voltage is close to zero, the second controlled end I/O of chip U1 is controlled by programmable pulse
3 receive, and programmable pulse controls chip U1 output high level by driving chip U2 current discharge to drive insulated gate bipolar
Transistor IGBT it is open-minded, the time opened by secondary feedback module 108 control.When insulated gate bipolar transistor IGBT turns off
When, the secondary energy of resonant frequencies isolating transformer is transferred to secondary, while the leakage of first capacitor C1 and resonance high frequency transformer
By the body diode forming circuit of insulated gate bipolar transistor IGBT resonance occurs for sense, when resonance point minimum voltage resonance connects
When nearly zero volt, zero passage detection sample resistance includes second resistance R2, the 4th resistance R4, the 6th resistance R6 and the 8th resistance
R8 detects that the second controlled end I/O 3 of low level triggering programmable pulse control chip U1 makes insulated gate bipolar transistor
IGBT conducting, so recycles.
To sum up, a kind of LED drive power provided by the embodiment of the utility model, including immunity module, the first rectification filter
Wave module, voltage changing module, the second rectification filtering module, constant flow module, feedback module, sampling module, switch module and driving
Control module carries out electromagnetism interference, rectification, filtering, voltage transformation, secondary whole by sequentially power supply signal to city's electricity output
After stream, secondary filtering and constant current processing, to drive LED light, while by sampling module acquisition rectification with it is filtered described
Power supply signal is simultaneously divided, and branch pressure voltage is exported；When branch pressure voltage is zero, drive control module control switch module is carried out
Conducting, and the turn-on time of the feedback signal drive control switch module according to feedback module output.And switch module includes
First capacitor, insulated gate bipolar transistor and the 9th resistance；First termination voltage changing module of first capacitor, first capacitor
The output end of second termination insulated gate bipolar transistor, the controlled termination drive control module of insulated gate bipolar transistor,
The first end of input the 9th resistance of termination of insulated gate bipolar transistor, the second end ground connection of the 9th resistance.From there through upper
Stating simple circuit structure can be realized the effect of constant-current driving LED lamp, and circuit switch uses high voltage bearing insulated gate bipolar
Transistor npn npn avoids traditional switching tube from, using loss caused by absorbing circuit, improving electricity using field-effect tube and triode
The efficiency in source, solving the problems, such as existing LED drive power technology, there is circuit structure is complex and inefficiency.
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 (10)
1. a kind of LED drive power, which is characterized in that the LED drive power includes:
Alternating current is accessed, the immunity module of electromagnetism interference is carried out for the power supply signal to city's electricity output；
It is connect with the immunity module, first for the power supply signal after electromagnetism interference to be rectified and filtered
Rectification filtering module；
It is connect with the rectification filtering module, for carrying out the transformation of voltage transformation to rectification and the filtered power supply signal
Module；
It is connect with the voltage changing module, for carrying out secondary rectification and secondary filtering to the power supply signal after voltage transformation
Second rectification filtering module；
It is connect with second rectification filtering module, it is permanent for being carried out to the power supply signal after secondary rectification and secondary filtering
After stream process, the constant flow module of LED light is driven；
It is connect with the voltage changing module and second rectification filtering module, for obtaining the power supply signal after voltage transformation
And export the feedback module of feedback signal；
It is connect with first rectification filtering module and the voltage changing module, for acquiring rectification and the filtered power supply letter
Number and divided, export the sampling module of branch pressure voltage；
It is connect with the voltage changing module and the sampling module, the switching molding for being connected when the branch pressure voltage is zero
Block；And
It is connect with the feedback module and the switch module, is used for the switch module according to the feedback signal drive control
Turn-on time drive control module.
2. LED drive power as described in claim 1, which is characterized in that the LED drive power further include:
It is connect with the alternating current and the drive control module, for carrying out the auxiliary of auxiliary power supply to the drive control module
Power module.
3. LED drive power as described in claim 1, which is characterized in that the LED drive power further include:
It is connect with the immunity module and the drive control module, for acquiring the power supply signal after electromagnetism interference
And carry out the Anti-surging module of Anti-surging.
4. LED drive power as described in claim 1, which is characterized in that first rectification filtering module includes:
Rectifier bridge, the first inductance and the second capacitor；
The input of the rectifier bridge terminates the immunity module, and the output of the rectifier bridge terminates the first of first inductance
End, the second end of first inductance connects altogether with the first end of second capacitor and connect with the voltage changing module, and described the
The second end of two capacitors is grounded.
5. LED drive power as described in claim 1, which is characterized in that the voltage changing module includes transformer.
6. LED drive power as described in claim 1, which is characterized in that the sampling module includes:
Second resistance, the 4th resistance, the 6th resistance and the 8th resistance；
The first termination voltage changing module of the second resistance, the of the second termination the 4th resistance of the second resistance
One end, the first end of the second termination the 6th resistance of the 4th resistance, the second end of the 6th resistance and described the
The first end of eight resistance connects altogether and connect with the drive control module, the second end ground connection of the 8th resistance.
7. LED drive power as described in claim 1, which is characterized in that the switch module includes:
First capacitor, insulated gate bipolar transistor and the 9th resistance；
The first termination voltage changing module of the first capacitor, the second termination insulated gate bipolar of the first capacitor
The output end of transistor, the controlled termination drive control module of the insulated gate bipolar transistor, the insulated gate are double
The input of bipolar transistor terminates the first end of the 9th resistance, the second end ground connection of the 9th resistance.
8. LED drive power as described in claim 1, which is characterized in that the drive control module includes:
Programmable pulse controls chip and driving chip；
The controlled termination feedback module of the first of the programmable pulse control chip, the programmable pulse control chip
The output of the second controlled termination sampling module, the programmable pulse control chip terminates the input of the driving chip
The output at end, the driving chip terminates the switch module.
9. LED drive power as claimed in claim 2, which is characterized in that the auxiliary power module includes battery.
10. LED drive power as claimed in claim 3, which is characterized in that the Anti-surging module includes:
First resistor, 3rd resistor, the 5th resistance and the 7th resistance；
The first termination immunity module of the first resistor, the second termination 3rd resistor of the first resistor
First end, the first end of the second termination the 5th resistance of the 3rd resistor, the second end of the 5th resistance with it is described
The first end of 7th resistance connects altogether and connect with the drive control module, the second end ground connection of the 7th resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276097.5U CN209659674U (en) | 2018-12-29 | 2018-12-29 | A kind of LED drive power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276097.5U CN209659674U (en) | 2018-12-29 | 2018-12-29 | A kind of LED drive power |
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| CN209659674U true CN209659674U (en) | 2019-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245527A (en) * | 2021-12-09 | 2022-03-25 | 厦门普为光电科技有限公司 | High-working-efficiency lighting device driving circuit and method thereof |
-
2018
- 2018-12-29 CN CN201822276097.5U patent/CN209659674U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245527A (en) * | 2021-12-09 | 2022-03-25 | 厦门普为光电科技有限公司 | High-working-efficiency lighting device driving circuit and method thereof |
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