CN207039970U - One kind removes ripple LED drive circuit - Google Patents
One kind removes ripple LED drive circuit Download PDFInfo
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- CN207039970U CN207039970U CN201721059589.8U CN201721059589U CN207039970U CN 207039970 U CN207039970 U CN 207039970U CN 201721059589 U CN201721059589 U CN 201721059589U CN 207039970 U CN207039970 U CN 207039970U
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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 provides one kind and removes ripple LED drive circuit, resistance R2 and electrolysis C composition RC wave filters, to obtain the virtual value of the output voltage UCO between the positive pole and negative pole that export LED module, driving switch pipe Q1 work；When electric in AC power, the DC voltage of rectification circuit output is added in voltage-stabiliser tube D3 both ends through resistance R2, electrolysis C, when voltage-stabiliser tube D3 both end voltages reach voltage stabilizing value, so that voltage-stabiliser tube D3 reverse breakdowns, quick charge is carried out after voltage-stabiliser tube D3 reverse breakdowns to electrolysis C, the voltage at electrolysis C both ends gradually rises, after the voltage for being electrolysed C both ends is raised to certain value, so that switching tube Q1 enters saturation region, reduce output ripple.The utility model provides one kind and removes ripple LED drive circuit, under the premise of same ripple effect is ensured, reduces the capacity of electrochemical capacitor, also just substantially reduces the volume of power supply, so that Switching Power Supply small product size reduces, and has preferable output characteristics.
Description
Technical field
It the utility model is related to a kind of drive circuit, more particularly to LED drive circuit.
Background technology
In current widely used Switching Power Supply, there is larger ripple in output end, these ripples have pole to properties of product
Especially in LED driving power, the light that the presence of ripple can cause LED to send damages the big that influences to human eye.
There is larger ripple in switched power output, can also influence the stability of product work, influence health.
Utility model content
Technical problem underlying to be solved in the utility model is to provide one kind and removes ripple LED drive circuit, and cost is low, ripple
Line is small.
In order to solve above-mentioned technical problem, the utility model provides one kind and removes ripple LED drive circuit, and its feature exists
In：AC power is connected to the ac input end of rectification circuit；The cathode output end of rectification circuit is connected to defeated by inductance L1
Go out the negative pole of LED module, cathode output end ground connection；Inductance L1 both ends are in parallel with resistance R1；
One end of the inductance L1 is grounded by electric capacity C1, and the other end is connect by the electric capacity C2 and resistance R3 being connected in series
Ground；The both ends of the electric capacity C2 being connected in series and resistance R3 are also in parallel with an electric capacity C3；The inductance L1 and output LED module
That one end of negative pole connection be also grounded by resistance R14, R15 for being connected in series, resistance R15 both ends are in parallel with electric capacity C9；
The inductance L1 is also connected to switching tube with exporting that one end that the negative pole of LED module is connected by armature winding T1
Q3 drain electrode；Switching tube Q3 grid is grounded by resistance R12, the electric capacity C4 being connected in series；The both ends of the resistance R12 are in parallel
Connect diode D5；Switching tube Q3 source electrode is connected to control chip U1 Drain stitch；The Vcc pins of the control chip U1
Pin is connected to electric capacity C4 and resistance R12 common port, RT stitch is grounded by resistance R13, COMP stitch is connected by diode D4
It is connected to resistance R14, R15 common port, COMP stitch also passes through resistance R4 by electric capacity C5 ground connection, GND stitch ground connection, CS stitch
Ground connection, resistance R4 both ends are connected in parallel resistance R3；
The drain electrode of the switching tube Q3 is grounded by diode D1, resistance R7, R6, the R5 being connected in series；Resistance R6, R5's
Common port is connected to control chip U1 FB stitch；Resistance R7, R6, R5 for being connected in series both ends are connected in parallel electric capacity C6；
The anode of the diode D1 is connected with switching tube Q3 drain electrode, and negative electrode is connected to output LED moulds by resistance R9B
Negative pole, the negative electrode of group are also connected to resistance R12, R14 common port by resistance R10, R11 for being connected in series；The resistance R9B
Both ends it is in parallel with resistance R9A；Resistance R9A both ends are in parallel with electrolysis C0；Electrolysis C0 negative pole is connected to output LED module
Negative pole, positive pole are connected to diode D1 negative electrode, electrolysis C0 positive pole is additionally coupled to resistance R7 and electric capacity C6 common port；
The negative pole of the output LED module is also connected to voltage-stabiliser tube D3 positive pole by being electrolysed C；Voltage-stabiliser tube D3 negative electrode connects
Diode D2 negative electrode is connected to, diode D2 anode is connected to the drain electrode of diode D1 negative electrode and switching tube Q1；Switch
Positive pole, the grid that pipe Q1 source electrode is connected to output LED module are connected to voltage-stabiliser tube D3 and are electrolysed C common port；
The both ends of the diode D2 are connected in parallel resistance R2；
Resistance R2 and electrolysis C composition RC wave filters, to obtain the output voltage between the positive pole and negative pole that export LED module
UCO virtual value, driving switch pipe Q1 work；
When electric in AC power, the DC voltage of rectification circuit output is added in voltage-stabiliser tube D3 both ends through resistance R2, electrolysis C,
When voltage-stabiliser tube D3 both end voltages reach voltage stabilizing value so that voltage-stabiliser tube D3 reverse breakdowns, electrolysis C is entered after voltage-stabiliser tube D3 reverse breakdowns
Row quick charge, the voltage at electrolysis C both ends gradually rise, after the voltage for being electrolysed C both ends is raised to certain value so that switching tube Q1
Into saturation region, reduce output ripple.
The utility model provides one kind and removes ripple LED drive circuit, under the premise of same ripple effect is ensured, reduces
The capacity of electrochemical capacitor, also just substantially reduce the volume of power supply so that Switching Power Supply small product size reduce, and have compared with
Good output characteristics.
Brief description of the drawings
Fig. 1 is the circuit diagram of LED drive circuit in the utility model preferred embodiment.
Embodiment
The technical solution of the utility model is further detailed below by way of embodiment combination accompanying drawing and
Description.
With reference to figure 1, one kind removes ripple LED drive circuit, it is characterised in that：AC power is connected to the exchange of rectification circuit
Input；The cathode output end of rectification circuit is connected to the negative pole of output LED module, cathode output end ground connection by inductance L1；
Inductance L1 both ends are in parallel with resistance R1；
One end of the inductance L1 is grounded by electric capacity C1, and the other end is connect by the electric capacity C2 and resistance R3 being connected in series
Ground；The both ends of the electric capacity C2 being connected in series and resistance R3 are also in parallel with an electric capacity C3；The inductance L1 and output LED module
That one end of negative pole connection be also grounded by resistance R14, R15 for being connected in series, resistance R15 both ends are in parallel with electric capacity C9；
The inductance L1 is also connected to switching tube with exporting that one end that the negative pole of LED module is connected by armature winding T1
Q3 drain electrode；Switching tube Q3 grid is grounded by resistance R12, the electric capacity C4 being connected in series；The both ends of the resistance R12 are in parallel
Connect diode D5；Switching tube Q3 source electrode is connected to control chip U1 Drain stitch；The Vcc pins of the control chip U1
Pin is connected to electric capacity C4 and resistance R12 common port, RT stitch is grounded by resistance R13, COMP stitch is connected by diode D4
It is connected to resistance R14, R15 common port, COMP stitch also passes through resistance R4 by electric capacity C5 ground connection, GND stitch ground connection, CS stitch
Ground connection, resistance R4 both ends are connected in parallel resistance R3；
The drain electrode of the switching tube Q3 is grounded by diode D1, resistance R7, R6, the R5 being connected in series；Resistance R6, R5's
Common port is connected to control chip U1 FB stitch；Resistance R7, R6, R5 for being connected in series both ends are connected in parallel electric capacity C6；
The anode of the diode D1 is connected with switching tube Q3 drain electrode, and negative electrode is connected to output LED moulds by resistance R9B
Negative pole, the negative electrode of group are also connected to resistance R12, R14 common port by resistance R10, R11 for being connected in series；The resistance R9B
Both ends it is in parallel with resistance R9A；Resistance R9A both ends are in parallel with electrolysis C0；Electrolysis C0 negative pole is connected to output LED module
Negative pole, positive pole are connected to diode D1 negative electrode, electrolysis C0 positive pole is additionally coupled to resistance R7 and electric capacity C6 common port；
The negative pole of the output LED module is also connected to voltage-stabiliser tube D3 positive pole by being electrolysed C；Voltage-stabiliser tube D3 negative electrode connects
Diode D2 negative electrode is connected to, diode D2 anode is connected to the drain electrode of diode D1 negative electrode and switching tube Q1；Switch
Positive pole, the grid that pipe Q1 source electrode is connected to output LED module are connected to voltage-stabiliser tube D3 and are electrolysed C common port；
The both ends of the diode D2 are connected in parallel resistance R2；
Resistance R2 and electrolysis C composition RC wave filters, to obtain the output voltage between the positive pole and negative pole that export LED module
UCO virtual value, driving switch pipe Q1 work；
When electric in AC power, the DC voltage of rectification circuit output is added in voltage-stabiliser tube D3 both ends through resistance R2, electrolysis C,
When voltage-stabiliser tube D3 both end voltages reach voltage stabilizing value so that voltage-stabiliser tube D3 reverse breakdowns, electrolysis C is entered after voltage-stabiliser tube D3 reverse breakdowns
Row quick charge, the voltage at electrolysis C both ends gradually rise, after the voltage for being electrolysed C both ends is raised to certain value so that switching tube Q1
Into saturation region, reduce output ripple.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (1)
1. one kind removes ripple LED drive circuit, it is characterised in that：AC power is connected to the ac input end of rectification circuit；It is whole
The cathode output end of current circuit is connected to the negative pole of output LED module, cathode output end ground connection by inductance L1；The two of inductance L1
End is in parallel with resistance R1；
One end of the inductance L1 is grounded by electric capacity C1, and the other end is grounded by the electric capacity C2 and resistance R3 being connected in series；Institute
The both ends for stating the electric capacity C2 being connected in series and resistance R3 are also in parallel with an electric capacity C3；The inductance L1 is negative with output LED module
That one end of pole connection is also grounded by resistance R14, R15 for being connected in series, and resistance R15 both ends are in parallel with electric capacity C9；
The inductance L1 is also connected to switching tube Q3's with exporting that one end that the negative pole of LED module is connected by armature winding T1
Drain electrode；Switching tube Q3 grid is grounded by resistance R12, the electric capacity C4 being connected in series；The both ends of the resistance R12 are connected in parallel
Diode D5；Switching tube Q3 source electrode is connected to control chip U1 Drain stitch；The Vcc stitch of the control chip U1 connects
It is connected to electric capacity C4 and resistance R12 common port, RT stitch is grounded by resistance R13, COMP stitch is connected to by diode D4
Resistance R14, R15 common port, COMP stitch are also connect by electric capacity C5 ground connection, GND stitch ground connection, CS stitch by resistance R4
Ground, resistance R4 both ends are connected in parallel resistance R3；
The drain electrode of the switching tube Q3 is grounded by diode D1, resistance R7, R6, the R5 being connected in series；Resistance R6, R5's is public
End is connected to control chip U1 FB stitch；Resistance R7, R6, R5 for being connected in series both ends are connected in parallel electric capacity C6；
The anode of the diode D1 is connected with switching tube Q3 drain electrode, and negative electrode is connected to output LED module by resistance R9B
Negative pole, negative electrode are also connected to resistance R12, R14 common port by resistance R10, R11 for being connected in series；The two of the resistance R9B
End is in parallel with resistance R9A；Resistance R9A both ends are in parallel with electrolysis C0；Electrolysis C0 negative pole is connected to the negative of output LED module
Pole, positive pole are connected to diode D1 negative electrode, electrolysis C0 positive pole is additionally coupled to resistance R7 and electric capacity C6 common port；
The negative pole of the output LED module is also connected to voltage-stabiliser tube D3 positive pole by being electrolysed C；Voltage-stabiliser tube D3 negative electrode is connected to
Diode D2 negative electrode, diode D2 anode are connected to the drain electrode of diode D1 negative electrode and switching tube Q1；Switching tube Q1
Source electrode be connected to output LED module positive pole, grid be connected to voltage-stabiliser tube D3 and be electrolysed C common port；
The both ends of the diode D2 are connected in parallel resistance R2；
Resistance R2 and electrolysis C composition RC wave filters, to obtain the output voltage UCO between the positive pole and negative pole that export LED module
Virtual value, driving switch pipe Q1 work；
When electric in AC power, the DC voltage of rectification circuit output is added in voltage-stabiliser tube D3 both ends through resistance R2, electrolysis C, when steady
Pressure pipe D3 both end voltages reach voltage stabilizing value so that voltage-stabiliser tube D3 reverse breakdowns, electrolysis C are carried out after voltage-stabiliser tube D3 reverse breakdowns fast
Speed charging, the voltage at electrolysis C both ends gradually rise, after the voltage for being electrolysed C both ends is raised to certain value so that switching tube Q1 enters
Saturation region, reduce output ripple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059589.8U CN207039970U (en) | 2017-08-23 | 2017-08-23 | One kind removes ripple LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059589.8U CN207039970U (en) | 2017-08-23 | 2017-08-23 | One kind removes ripple LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207039970U true CN207039970U (en) | 2018-02-23 |
Family
ID=61488050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721059589.8U Active CN207039970U (en) | 2017-08-23 | 2017-08-23 | One kind removes ripple LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207039970U (en) |
-
2017
- 2017-08-23 CN CN201721059589.8U patent/CN207039970U/en active Active
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