CN202979385U - Constant-current drive circuit and LED light source lightening circuit having constant-current drive circuit - Google Patents
Constant-current drive circuit and LED light source lightening circuit having constant-current drive circuit Download PDFInfo
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- CN202979385U CN202979385U CN 201220619552 CN201220619552U CN202979385U CN 202979385 U CN202979385 U CN 202979385U CN 201220619552 CN201220619552 CN 201220619552 CN 201220619552 U CN201220619552 U CN 201220619552U CN 202979385 U CN202979385 U CN 202979385U
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Abstract
The constant-current drive circuit (100) disclosed by the utility model comprises a rectification filter circuit, a constant-current driving integrated circuit, and a butting portion (101). The butting portion (101) comprises a butting terminal (1011), a connecting terminal (1012), and a first terminal (1), a second terminal (2), and a third terminal (3) which are located between the butting terminal (1011) and the connecting terminal (1012). The tail ends of the second terminal (2) and the third terminal (3) are roughly located on a same straight line and are closer to the butting terminal (1011) relative to the tail end of the first terminal (1). The first terminal (1) is directly connected with the rectification filter circuit through a first lead wire. The second and third terminals are not directly connected with the rectification filter circuit through lead wires, but are connected in parallel and then divided into three paths to be connected to the constant-current driving integrated circuit.
Description
[technical field]
The utility model relates to a kind of drive circuit, especially refers to a kind of constant-current drive circuit of LED light source.
[background technology]
LED(Light Emitting Diode) light fixture have that the life-span is long, light efficiency is high, shock resistance, low energy consumption etc. advantage, belong to green energy-conserving and environment-protective illumination, now be widely used in the Lumination ﹠ Decoration field, and along with encouragement and the popularization of national governments, the LED lamp is more and more universal and the trend of replacing gradually traditional lighting arranged.
LED lamp demand motive circuit is lighted, and lights LED light source thereby traditional drive circuit docks with the LED light source plate.In real operation, when installing or keep in repair the LED lamp, may first drive circuit be docked energising with power supply and be loaded on the LED light source plate, perhaps the LED light source plate in the situation that drive circuit energising disconnect with drive circuit, in this case, the electrochemical capacitor of drive circuit continues charging, makes the load of drive circuit open end constantly raise over the carrying limit of LED light source plate, when the LED light source plate docked with drive circuit again, the LED light source plate can be punctured by moment and be damaged.
Therefore, in order to overcome defects, be necessary to provide a kind of improved LED light source drive circuit.
[utility model content]
The purpose of this utility model is to provide a kind of constant-current drive circuit of supporting hot plug.
to achieve these goals, the utility model adopts following technical scheme: a kind of constant-current drive circuit comprises current rectifying and wave filtering circuit, the constant current drive integrated circult, and docking section, the docking section comprises butt end and link, the docking section also comprise between butt end and link first, second, the 3rd terminal, the end of the second terminal and the 3rd terminal roughly is positioned at the end of same straight line and relative the first terminal and the butt end distance is nearer, the first terminal directly is connected with rectification circuit filtering by the first wire, second, the 3rd terminal directly is not connected with the rectification drive circuit by wire, second, in parallel minute three tunnel access constant current drive integrated circults of the 3rd terminal.
Compared to prior art, the utility model LED light source drive circuit has following advantage: make drive circuit and can not puncture in the situation that load voltage can dock with the LED light source plate LED light source plate to cause light source board to damage by circuit design.
The utility model purpose also is to provide a kind of LED light source lighting circuit of supporting hot plug.
to achieve these goals, the utility model adopts following technical scheme: a kind of LED light source lighting circuit, the LED light source plate that it comprises constant-current drive circuit and docks with constant-current drive circuit, constant-current drive circuit comprises current rectifying and wave filtering circuit, the constant current drive integrated circult, and docking section, the docking section comprises butt end and link, the LED light source plate has a docking part, the docking section of LED light source plate has a butt end and a link, dock with the butt end of the docking section of drive circuit the butt end of LED light source plate, the docking section also comprise between butt end and link first, second, the 3rd terminal, the end of the second terminal and the 3rd terminal roughly is positioned at the end of same straight line and relative the first terminal and the butt end distance is nearer, the first terminal directly is connected with rectification circuit filtering by the first wire, second, the 3rd terminal directly is not connected with the rectification drive circuit by wire, second, in parallel minute three tunnel access constant current drive integrated circults of the 3rd terminal, the docking section of LED light source plate has the 4th, the 5th, the six or three terminal, during docking, second of the docking section of constant-current drive circuit, the 5th of the docking section of the 3rd terminal and LED light source plate, the at first conducting of the 6th terminal, then the 4th terminal conducting again of the first terminal of the docking section of constant-current drive circuit and LED light source plate.
Compared to prior art, the utility model LED light source lighting circuit has following advantage: dock by the docking section with three terminals between drive circuit and LED light source plate, and the syndeton of terminal and inside circuit makes this lighting circuit support the hot plug between LED light source and drive circuit and can not damage LED.
[description of drawings]
Fig. 1 is the structural representation of the utility model LED lamp drive circuit.
[embodiment]
With reference to shown in Figure 1, thereby the utility model LED lamp drive circuit 100 is used for docking with LED light source plate 200 and provides power supply for LED light source plate 200.
The input voltage of drive circuit 100 is 220V, comprises the current rectifying and wave filtering circuit that is connected with external power source, the constant current drive integrated circult that is connected with current rectifying and wave filtering circuit, switching tube Q1, current-limiting inductance L1, sustained diode 1, output filter capacitor C1, reaches docking section 101.LED light source plate 200 also has docking section 201, and drive circuit 100 and LED light source plate 200 are connected to complete docking by docking section 101,201 separately.The docking section 101 of drive circuit 100 has a butt end 1011 and a link 1012, and wherein butt end 1011 is in order to dock with the docking section 201 of LED light source plate 200, and link 1012 is connected in order to the internal circuit with drive circuit 100.The docking section 101 of drive circuit 100 has three butts, and wherein the end of the second terminal 2 and the 3rd terminal 3 roughly is positioned at the end of same straight line and relative the first terminal 1 and butt end 1011 apart from nearer.The end of the first terminal 1 than second, third terminal 2,3 end-to-end distance away from butt end 1011.
The first terminal 1 is by the first wire a and rectification circuit conducting, and wherein the constant current drive integrated circult is connected in parallel on the first wire a, and second, third terminal 2,3 does not all directly connect current rectifying and wave filtering circuit.Connect an electrochemical capacitor C1 between second, third terminal 2,3, the positive pole of electrochemical capacitor C1 is positioned at the second terminal 2 one ends.Output circuit after second, third terminal 2,3 connects is in parallel with the constant current drive integrated circult by after current-limiting inductance L1 minute three tunnel second wire b, c, d.The second wire b directly is communicated with the constant current drive integrated circult.The end of privates c is connected with the second wire b by switching tube Q1, and the end of wire d is connected with switching tube Q1 by wire e, then is connected with the second wire b via switching tube Q1.The other end of privates c, d connects respectively the constant current drive integrated circult.A sustained diode 1 in parallel between the second wire b and the first wire a.Wire e is connected then ground connection of rear connecting resistance R1 with wire d.
The docking section 201 of LED light source plate 200 has a butt end 2011 and a link 2012, and dock with the butt end 1011 of the docking section 101 of drive circuit 100 butt end 2011.Docking section 201 has the 4th, the 5th, the 63 terminal 4,5,6.Four, be connected with LED light source plate 200 after Five-terminals 4,5 parallel connections, the 6th terminal 6 directly is connected with LED light source plate 200 by wire.The end of the 4th terminal 4, Five-terminals 5 and the 6th terminal 6 roughly is positioned at same straight line.
Thereby drive circuit 100 and LED light source plate 200 dock the LED light source consisting lighting circuits by docking section 101,201 separately.
when normal use, the first terminal 1 is connected with the 4th terminal 4, the second terminal 2 is connected with Five-terminals 5, the 3rd terminal 3 is connected with the 6th terminal 6, the alternating current of 220V obtains required direct current through current rectifying and wave filtering circuit, constant current drive integrated circult output high level is to the grid of switching tube Q1, the Q1 conducting, electric current is through the first terminal 1 and the 4th terminal 4, the LED light source plate, the 6th terminal 6 and the 3rd terminal 3, current-limiting inductance L1, switching tube Q1 and resistance R 1 turn back to ground, give electrochemical capacitor C1 charging through Five-terminals 5 and second terminal 2 of binding post simultaneously, because the electric current of inductance lags behind voltage, electric current rises gradually, voltage on R1 also rises thereupon, when rising to the threshold voltage of constant current drive integrated circult, constant current drive integrated circult output low level, switching tube Q1 closes and not conducting, current-limiting inductance L1 continues as the power supply of LED light source plate through sustained diode 1 by docking section 101, until inductance L 1 is discharged, constant current drive integrated circult zero passage detection pin detects low level, the defeated high level of constant current drive integrated circult, repeat a process, make LED obtain the constant current of 120mA.
when energising, may or docking section 101 with the docking section 201 of LED light source plate 200 and drive circuit 100 be installed when disconnecting due to maintenance, due to the first terminal 1 and the 4th terminal 4 respectively with docking section 101, 201 butt end 1011, 2011 is far away, therefore the first terminal 1 and the 4th terminal 4 can first disconnect, this moment, electrochemical capacitor C1 can not charge again, electrochemical capacitor C1 continues through the docking section 101, the second terminal 2 of 201 and Five-terminals 5 and the discharge of LED light source plate, directly cause docking section 101, 201 disconnect fully, the voltage at the two ends of electrochemical capacitor C1 is far below the normal pressure drop of LED at this moment.When again with docking section 101,201 docking, the second terminal 2 and Five-terminals 5, the 3rd terminal 3 and the 6th terminal 6 are first connected, and this moment, electrochemical capacitor C1 was in parallel with the LED light source plate, and last the first terminal 1 and the 4th terminal 4 are connected.Circuit is resumed work, and LED higher than the 64V voltage when normal does not appear in whole process LED light source plate two ends, thus just the LED overcurrent can not appear, thus realized the LED hot plug of LED constant-flow driver.
Claims (10)
1. a constant-current drive circuit comprises current rectifying and wave filtering circuit, the constant current drive integrated circult, and docking section, described docking section comprises butt end and link, it is characterized in that: described docking section also comprise between described butt end and link first, second, the 3rd terminal, the end of described the second terminal and the 3rd terminal roughly is positioned at the end of same straight line and relative the first terminal and the butt end distance is nearer, described the first terminal directly is connected with rectification circuit filtering by the first wire, described second, the 3rd terminal directly is not connected with the rectification drive circuit by wire, described second, in parallel minute three tunnel described constant current drive integrated circults of access of the 3rd terminal.
2. constant-current drive circuit as claimed in claim 1, it is characterized in that: connect an electrochemical capacitor between described second, third terminal, the positive pole of described electrochemical capacitor is positioned at the second terminal one end.
3. constant-current drive circuit as claimed in claim 2, it is characterized in that: after described second, third terminal electrochemical capacitor in parallel, the negative pole output circuit of electrochemical capacitor is in parallel with the constant current drive integrated circult by after current-limiting inductance minute three line conductors, described three line conductors be respectively second, third, privates.
4. constant-current drive circuit as claimed in claim 3, it is characterized in that: described the second wire directly is communicated with described constant current drive integrated circult, and an end of described privates is connected with described the second wire by described switching tube.
5. constant-current drive circuit as claimed in claim 4, it is characterized in that: an end of described privates is connected with described switching tube by one the 5th wire, be connected with described the second wire via described switching tube, the other ends described the 3rd, privates connect respectively described constant current drive integrated circult again.
6. constant-current drive circuit as claimed in claim 4 is characterized in that: a fly-wheel diode in parallel between described the second wire and the first wire.
7. constant-current drive circuit as claimed in claim 5 is characterized in that: connecting resistance ground connection then after described the 5th wire is connected with privates.
8. LED light source lighting circuit, the LED light source plate that it comprises constant-current drive circuit and docks with constant-current drive circuit, described constant-current drive circuit comprises current rectifying and wave filtering circuit, the constant current drive integrated circult, and docking section, described docking section comprises butt end and link, described LED light source plate has a docking part, the docking section of described LED light source plate has a butt end and a link, dock with the butt end of the docking section of described drive circuit the butt end of described LED light source plate, it is characterized in that: described docking section also comprise between described butt end and link first, second, the 3rd terminal, the end of described the second terminal and the 3rd terminal roughly is positioned at the end of same straight line and relative the first terminal and the butt end distance is nearer, described the first terminal directly is connected with rectification circuit filtering by the first wire, described second, the 3rd terminal directly is not connected with the rectification drive circuit by wire, described second, in parallel minute three tunnel described constant current drive integrated circults of access of the 3rd terminal, the docking section of described LED light source plate has the 4th, the 5th, the six or three terminal, during docking, second of the docking section of described constant-current drive circuit, the 5th of the docking section of the 3rd terminal and LED light source plate, the at first conducting of the 6th terminal, then the 4th terminal conducting again of the first terminal of the docking section of described constant-current drive circuit and described LED light source plate.
9. LED light source lighting circuit as claimed in claim 8, it is characterized in that: described second, connect an electrochemical capacitor between the 3rd terminal, the positive pole of described electrochemical capacitor is positioned at the second terminal one end, described second, after the 3rd terminal electrochemical capacitor in parallel, the negative pole output circuit of electrochemical capacitor is in parallel with the constant current drive integrated circult by after current-limiting inductance minute three line conductors, described three line conductors are respectively second, the 3rd, privates, described the second wire directly is communicated with described constant current drive integrated circult, one end of described privates is connected with described the second wire by described switching tube, one end of described privates is connected with described switching tube by one the 5th wire, be connected with described the second wire via described switching tube again, the described the 3rd, the other end of privates connects respectively described constant current drive integrated circult, a fly-wheel diode in parallel between described the second wire and the first wire.
10. LED light source lighting circuit as claimed in claim 8 is characterized in that: the docking section of described LED light source plate the 4th, be connected with described LED light source plate after the Five-terminals parallel connection, described the 6th terminal directly is connected with described LED light source plate by another wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619552 CN202979385U (en) | 2012-11-21 | 2012-11-21 | Constant-current drive circuit and LED light source lightening circuit having constant-current drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619552 CN202979385U (en) | 2012-11-21 | 2012-11-21 | Constant-current drive circuit and LED light source lightening circuit having constant-current drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202979385U true CN202979385U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220619552 Expired - Fee Related CN202979385U (en) | 2012-11-21 | 2012-11-21 | Constant-current drive circuit and LED light source lightening circuit having constant-current drive circuit |
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| Country | Link |
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| CN (1) | CN202979385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841693A (en) * | 2012-11-21 | 2014-06-04 | 欧普照明股份有限公司 | Constant current drive circuit and LED light source lighting circuit with constant current drive circuit |
-
2012
- 2012-11-21 CN CN 201220619552 patent/CN202979385U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841693A (en) * | 2012-11-21 | 2014-06-04 | 欧普照明股份有限公司 | Constant current drive circuit and LED light source lighting circuit with constant current drive circuit |
| CN103841693B (en) * | 2012-11-21 | 2017-02-15 | 欧普照明股份有限公司 | Constant current drive circuit and LED light source lighting circuit with constant current drive circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20211121 |