CN208369896U - A kind of anti-lightning LED drive circuit - Google Patents
A kind of anti-lightning LED drive circuit Download PDFInfo
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- CN208369896U CN208369896U CN201721861760.7U CN201721861760U CN208369896U CN 208369896 U CN208369896 U CN 208369896U CN 201721861760 U CN201721861760 U CN 201721861760U CN 208369896 U CN208369896 U CN 208369896U
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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]
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Abstract
The utility model discloses a kind of anti-lightning LED drive circuits, output module is rectified including sequentially connected alternating current input module, primary side rectification filtering module, main switch conversion module and secondary side, the output voltage of primary side feedback control module monitoring secondary side rectification output module and the change frequency for controlling main switch conversion module, the alternating current input module includes fuse, varistor, first capacitor, first resistor, second resistance and the first inductance；Fuse is connected on alternating current firewire, fuse one end is connect with one end of varistor, first capacitor, first resistor and the first inductance, the other end of varistor is connect with alternating current zero curve, the first capacitor other end is connect with two line of alternating current, the other end of first resistor and one end of second resistance connect, and one end of second resistance is connect with alternating current zero curve.It solves current anti-lightning LED drive circuit and needs thermistor, the problems such as component number is more, and circuit is complicated, and circuit module is more, high production cost.
Description
Technical field
The utility model relates to a kind of LED drive circuit more particularly to a kind of LED drive circuits of anti-lightning.
Background technique
For LED because the high and low power consumption of brightness that it has many advantages, such as, service life length, starting are fast, power is small, raw in the modern times without stroboscopic
It has a wide range of applications in work, especially on the open air and interior illuminator that people use.LED needs and matched drive
Dynamic circuit uses, which needs to be arranged EMC protection module to meet the EMC standard of national requirements.But in mesh
It is preceding in use, only meeting EMC standard does not adapt to actual operation requirements, more LED drive circuits require
With anti-lightning strike function.In order to realize anti-lightning strike function, often increases anti-lightning strike module in actual production in the driving circuit, have
It is all common varistor to be added on AC input route to concatenate thermistor again, or string electric current is added to protect mostly for body
Dangerous silk and air discharge tube concatenate thermistor again.Although such circuit setting realizes when preventing lightning stroke overtension to production
Product circuit generates impact failure, but its circuit structure is complicated, needs to increase circuit module, more using component, necessarily increases
The space that product is also wasted while manufacturing cost, causes small product size to increase.Faced with this situation, EMC protection module
As meeting country's EMC standard and the circuit module that must be provided with, how by simple modifications to allow to have both anti-lightning strike function
The problems such as energy then solves and needs to increase circuit module at present, and circuit cost is high, complex circuit designs.
Utility model content
The utility model provides a kind of anti-lightning LED drive circuit, it is desirable to provide a kind of to be realized using EMC filter module
The LED drive circuit of anti-lightning function solves current anti-lightning LED drive circuit and needs thermistor, and component number is more, electricity
The problems such as road is complicated, and circuit module is more, high production cost.
A kind of anti-lightning LED drive circuit described in the utility model, including sequentially connected alternating current input module, primary side
Rectification filtering module, main switch conversion module and secondary side rectify output module, and it is whole that primary side feedback control module monitors secondary side
It flows the output voltage of output module and controls the change frequency of main switch conversion module, the alternating current input module includes insurance
Silk, varistor, first capacitor, first resistor, second resistance and the first inductance；Fuse, fuse are connected on alternating current firewire
One end is connect with one end of varistor, first capacitor, first resistor and the first inductance, the other end and city's electrical zero of varistor
Line connection, the first capacitor other end are connect with two line of alternating current, and the other end of first resistor and one end of second resistance connect, and second
One end of resistance is connect with alternating current zero curve.
A kind of anti-lightning LED drive circuit described in the utility model is introduced alternating current by setting alternating current input module,
The direct current output of smooth steady is obtained by current rectifying and wave filtering circuit, and primary side feedback control module passes through monitoring output situation control
The change frequency of main switch conversion module ensures that output is stablized, meets the constant current output requirement of LED driving.And the utility model
Middle alternating current input module is provided with fuse on alternating current firewire, and when line short circuit current is excessive, fuse will fuse, and realizes
Protection to circuit is provided with varistor between alternating current zero curve and firewire, since varistor is to voltage-sensitive, in voltage mistake
Resistance value reduces when high, so bearing big voltge surge on circuit when circuit meets with and is struck by lightning, the tissue of varistor is reduced,
Big voltage on circuit is flowed into zero curve by varistor and big voltage is released to greatly with this, will not generate impact to circuit；
When voltage is excessive, when varistor can not undertake drainage function, varistor resistance value is reduced, and is equivalent to alternating current zero curve fire
Line is shorted, and the fuse being arranged on alternating current firewire will fuse, and city, which is electrically accessed, to be disconnected, and will not generate impact to circuit；And it is electric
Appearance, resistance and inductance constitute filter circuit, to realize EMC AF panel.In this regard, the alternating current input module of the utility model passes through
Varistor, capacitor, resistance and inductance realize the absorption of lightning stroke voltage and EMC AF panel, pass through a circuit module and realize EMC
It protects and anti-lightning strike, and is not necessarily to temperature-sensitive element, component number is few, and circuit is simple, by the simple of script EMC protection circuit
Improvement makes it have both anti-lightning strike function, and circuit module is few, and circuit evolving is simple, at low cost, solves current LED drive circuit
It has both lightning protection function and needs the problem of increasing anti-lightning strike module.
Detailed description of the invention
Fig. 1 is the utility model circuit block diagram；
Fig. 2 is the utility model circuit diagram.
Specific embodiment
As depicted in figs. 1 and 2, a kind of anti-lightning LED drive circuit described in the utility model, including sequentially connected alternating current
Input module 1, primary side rectification filtering module 2, main switch conversion module 3 and secondary side rectify output module 5, primary side feedback control
Molding block 4 monitors the output voltage of secondary side rectification output module 5 and controls the change frequency of main switch conversion module 3, described
Alternating current input module 1 includes fuse F1, varistor MOV1, first capacitor C1, first resistor R1, second resistance R2 and first
Inductance C1；Fuse F1, the one end fuse F1 and varistor MOV1, first capacitor C1, first resistor are connected on alternating current firewire
The connection of one end of R1 and the first inductance L1, the other end of varistor MOV1 are connect with alternating current zero curve, the first capacitor C1 other end
It is connect with two line of alternating current, the other end of first resistor R1 is connect with one end of second resistance R2, one end and city of second resistance R2
The connection of electrical zero line.Alternating current input module realizes that lightning stroke voltage absorbs and EMC is interfered by varistor, capacitor, resistance and inductance
Inhibit, first resistor R1, second resistance R2, first capacitor C1 and the first inductance L1 constitute filter circuit, realize EMC interference suppression
System, wherein the first inductance L1 is seen also in addition to inhibiting EMC interference and current limliting, Antisurge current effect.When circuit meets with and is struck by lightning, electricity
Big voltge surge is born in road, and the tissue of varistor reduces, and the big voltage on circuit flows into zero curve by varistor with this
Big voltage is released to greatly, impact will not be generated to circuit；When voltage is excessive, varistor can not undertake function of releasing
When energy, varistor resistance value is reduced, and is equivalent to alternating current zero curve firewire short circuit, and the fuse being arranged on alternating current firewire will fuse, city
It is electrically accessed and is disconnected, impact will not be generated to circuit.
As shown in Fig. 2, the primary side rectification filtering module 2 includes, first is whole to the 4th rectifier diode D1-D4,
Two capacitor C2 and third capacitor C3；Alternating current zero curve and the second rectifier diode D2 anode and third rectification D3 diode cathode connect
It connects, the second rectifier diode D2 cathode is connect with the first rectifier diode D1 cathode, third rectifier diode D3 anode and the 4th
The connection of rectifier diode D4 anode, the first rectifier diode D1 anode and the 4th rectifier diode D4 cathode are inputted with alternating current
The other end connection of first inductance C1 in module, the second capacitor C2 and third capacitor C3 are parallel to the first rectifier diode D1 cathode
And the 4th between rectifier diode D4 anode, the 4th rectifier diode D4 anode is connect with zero-potential point.Primary side rectifying and wave-filtering
Module converts the alternating voltage that route inputs to smooth DC voltage, provides energy for following stage main switch conversion module.
As shown in Fig. 2, the primary side feedback control module 4 includes, third to the 17th resistance R3-R17, the 4th to the 7th
The transformer feedback winding of capacitor C4-C7, the 5th diode D5, the 6th diode D6, primary side feedback control chip U1；Third
The one end resistance R3 is connect with the first rectifier diode D1 cathode, and the other end is connected with the 4th resistance R4 and the 5th resistance R5, and the 5th
The resistance R5 other end is connect with primary side feedback control chip U1 power pins, and the driving output of primary side feedback control chip U1 is drawn
Foot is connect with one end of the 6th resistance R6 and the 7th resistance R7, and the 6th resistance R6 other end is connect with the 5th diode D5 cathode,
5th diode D5 anode is connect with the 7th resistance R7 other end, primary side feedback control chip U1 current detecting input pin with
One end of 9th resistance R9 and the 4th capacitor C4 connects, and another termination zero-potential point of the 4th capacitor C4, the 9th resistance R9's is another
One end is connect with one end of the 8th resistance R8, the tenth resistance R10, eleventh resistor R11 and twelfth resistor R12, the 8th resistance
The other end of R8 is connect with the 5th diode D5 anode, and the tenth resistance R10, eleventh resistor R11 and twelfth resistor R12's is another
One end is connect with zero-potential point；Transformer feedback winding is in parallel with the 7th capacitor, the 7th one end capacitor C7 and thirteenth resistor R13
Connected with one end of the 15th resistance R15, another termination zero-potential point of the 7th capacitor C7, the other end of the 15th resistance R15 with
The anode connection of 6th diode D6, the cathode of the 6th diode D6 and one end of the 14th resistance R14 and the 6th capacitor C6 connect
It connects, another termination zero-potential point of the 6th capacitor C6, the other end and the 5th capacitor C5 of the 14th capacitor C14 and primary side feedback control
The connection of coremaking piece U1 power pins, the other end of the 5th capacitor C5 are connect with zero-potential point；The other end of thirteenth resistor R13 with
16th resistance R16, the 17th resistance R17 are connected with the feedback input pin of primary side feedback control chip U1, the 16th resistance
The other end of R16 and the 17th circuit R17 are connect with zero-potential point；The grounding leg and zero-potential point of primary side feedback control chip U1
Connection.Primary side feedback controls the variation of (PSR) module effect detection output charging voltage and current, is switched by PSR chip controls
Plumber's working frequency makes output remain stable voltage and current output.
As shown in Fig. 2, the main switch conversion module 3 includes, the 18th to 20 resistance R18-R20, the 8th capacitor C8,
7th diode D7, field-effect tube Q1, transformer input winding and transformer export winding；Field-effect tube Q1 grid passes through the 7th
Resistance R7 and primary side feedback control chip U1 driving output pin connects, field-effect tube Q1 source electrode by eleventh resistor R11 and
Zero-potential point connection, field-effect tube Q1 drains to be connect with the transformer of the 7th diode D7 anode input winding one end, and the seven or two
Pole pipe D7 cathode the 20th resistance R20 and the 8th capacitor C8 and transformer the output winding other end of successively contacting is connect, and the 18th
Resistance R18 and the 19th resistance R19 are connected in parallel on the 8th both ends capacitor C8.Main switch conversion module receives the energy of prime supply,
Its switching tube is made it always work in the on and off recurrent state an of high speed by the control of PSR chip, transformation when conducting
Device storage energy, when cut-off, release energy.
As shown in Fig. 2, the secondary side rectification output module 5 includes the 9th to the 12nd capacitor C9-C12, the 21st
To the 23rd resistance R21-R23, the 8th diode D8, the 9th diode D9 and the second inductance C2, transformer exports winding
One end ground connection, transformer export the other end and the 22nd resistance R22, the 23rd resistance R23, the 8th diode of winding
One end connection of D8, the 9th diode D9, the other end and the 9th capacitor of the 22nd resistance R22 and the 23rd resistance R23
One end of C9 connects, the other end of the 9th capacitor C9 and the other end and the tenth capacitor of the 8th diode D8, the 9th diode D9
One end of C10 connects, the other end ground connection of the tenth capacitor C10, the 11st capacitor C11, the 12nd capacitor C12 and the 23rd electricity
Resistance R23 is connected in parallel on the tenth both ends capacitor C10, and the 23rd ungrounded end resistance R23 is connect with second the first winding of inductance L2,
Second inductance L2 the first winding other end is the cathode output end of anti-lightning LED drive circuit, second the second winding of inductance L2 one
End ground connection, the other end are the cathode output end of anti-lightning LED drive circuit.Secondary side current rectifying and wave filtering circuit its act on and make to switch
Translation circuit secondary induction to voltage become the DC DC voltage of the desired smooth steady of LED device.
The zero-potential point is grounded after being sequentially connected in series the 11st capacitor C11 and the 12nd capacitor C12.
Claims (6)
1. a kind of anti-lightning LED drive circuit, including sequentially connected alternating current input module, primary side rectification filtering module, master
Switch change-over module and secondary side rectify output module, and primary side feedback control module monitors the output of secondary side rectification output module
Voltage and the change frequency for controlling main switch conversion module, which is characterized in that the alternating current input module includes fuse, pressure-sensitive
Resistance, first capacitor, first resistor, second resistance and the first inductance；Fuse, fuse one end and pressure are connected on alternating current firewire
Quick resistance, first capacitor, first resistor are connected with one end of the first inductance, and the other end of varistor is connect with alternating current zero curve,
The first capacitor other end is connect with two line of alternating current, and the other end of first resistor and one end of second resistance connect, second resistance
One end is connect with alternating current zero curve.
2. a kind of anti-lightning LED drive circuit according to claim 1, which is characterized in that the primary side rectifying and wave-filtering
Module includes that first is whole to the 4th rectifier diode, the second capacitor and third capacitor；Alternating current zero curve and the second rectifier diode are just
Pole is connected with third rectifier diode cathode, and the second rectifier diode cathode is connect with the first rectifier diode cathode, and third is whole
Stream diode cathode is connect with the 4th rectifier diode anode, and the first rectifier diode anode and the 4th rectifier diode cathode are equal
It is connect with the other end of the first inductance in alternating current input module, the second capacitor and third capacitor are parallel to the first rectifier diode and bear
Between pole and the 4th rectifier diode anode, the 4th rectifier diode anode is connect with zero-potential point.
3. a kind of anti-lightning LED drive circuit according to claim 2, which is characterized in that the primary side feedback controls mould
Block includes that third to the 17th resistance, the 4th to the 7th capacitor, the 5th diode, the 6th diode, primary side feedback control chip
Transformer feedback winding；3rd resistor one end is connect with the first rectifier diode cathode, the other end and the 4th and the 5th resistance
Series connection, the 5th resistance other end are connect with primary side feedback control chip power pin, and primary side feedback controls the driving output of chip
Pin is connect with one end of the 6th resistance and the 7th resistance, and the 6th resistance other end is connect with the 5th diode cathode, and the five or two
Pole pipe anode is connect with the 7th resistance other end, and primary side feedback controls the current detecting input pin and the 9th resistance and the 4th of chip
One end of capacitor connects, another termination zero-potential point of the 4th capacitor, the other end and the 8th resistance of the 9th resistance, the tenth electricity
Resistance, eleventh resistor are connected with one end of twelfth resistor, and the other end of the 8th resistance is connect with the 5th diode cathode, and the tenth
The other end of resistance, eleventh resistor and twelfth resistor is connect with zero-potential point；Transformer feedback winding and the 7th capacitor are simultaneously
Connection, the 7th capacitor one end are connect with one end of thirteenth resistor and the 15th resistance, another termination zero-potential point of the 7th capacitor, the
The other end of 15 resistance is connect with the anode of the 6th diode, the cathode and the 14th resistance of the 6th diode and the 6th capacitor
One end connection, another termination zero-potential point of the 6th capacitor, the other end and the 5th capacitor and primary side feedback of the 14th capacitor
The connection of chip power pin is controlled, the other end of the 5th capacitor is connect with zero-potential point；The other end of thirteenth resistor and the tenth
Six resistance, the 17th resistance are connected with the feedback input pin of primary side feedback control chip, the 16th resistance and the 17th circuit
The other end connect with zero-potential point；The grounding leg of primary side feedback control chip is connect with zero-potential point.
4. a kind of anti-lightning LED drive circuit according to claim 3, which is characterized in that the main switch conversion module
Including the 18th to 20 resistance, the 8th capacitor, the 7th diode, field-effect tube, transformer input winding and transformer output
Winding；Field-effect tube grid controls chip drives output pin with primary side feedback by the 7th resistance and connect, field-effect tube source electrode
It is connect by eleventh resistor with zero-potential point, the transformer of FET drain and the 7th diode cathode inputs winding one end
Connection, successively contact the 20th resistance and the 8th capacitor of the 7th diode cathode export the winding other end with transformer and connect, the
18 resistance and the 19th resistor coupled in parallel are at the 8th capacitor both ends.
5. a kind of anti-lightning LED drive circuit according to claim 4, which is characterized in that the secondary side rectification output
Module includes the 9th to the 12nd capacitor, the 21st to the 23rd resistance, the 8th diode, the 9th diode and second
Inductance, transformer export one end ground connection of winding, and transformer exports the other end and the 22nd resistance, the 23rd electricity of winding
The other end and the 9th electricity of resistance, one end connection of the 8th diode, the 9th diode, the 22nd resistance and the 23rd resistance
One end of appearance connects, the other end and the 8th diode, the other end of the 9th diode and one end of the tenth capacitor of the 9th capacitor
Connection, the other end ground connection of the tenth capacitor, the 11st capacitor, the 12nd capacitor and the 23rd resistor coupled in parallel are in the tenth capacitor two
End, the 23rd ungrounded end of resistance are connect with second the first winding of inductance, and second inductance the first winding other end is anti-lightning
The cathode output end of LED drive circuit, second inductance the second winding one end ground connection, the other end are anti-lightning LED drive circuit
Cathode output end.
6. according to a kind of described in any item anti-lightning LED drive circuits of claim 2-4, which is characterized in that the zero potential
Point is grounded after being sequentially connected in series the 11st capacitor and the 12nd capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861760.7U CN208369896U (en) | 2017-12-27 | 2017-12-27 | A kind of anti-lightning LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861760.7U CN208369896U (en) | 2017-12-27 | 2017-12-27 | A kind of anti-lightning LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208369896U true CN208369896U (en) | 2019-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721861760.7U Active CN208369896U (en) | 2017-12-27 | 2017-12-27 | A kind of anti-lightning LED drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208369896U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946506A (en) * | 2019-04-16 | 2019-06-28 | 深圳市闿思科技有限公司 | Zero-crossing detection system |
-
2017
- 2017-12-27 CN CN201721861760.7U patent/CN208369896U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946506A (en) * | 2019-04-16 | 2019-06-28 | 深圳市闿思科技有限公司 | Zero-crossing detection system |
| CN109946506B (en) * | 2019-04-16 | 2023-10-24 | 深圳市闿思科技有限公司 | Zero crossing detection system |
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