CN200969692Y - LED driver - Google Patents
LED driver Download PDFInfo
- Publication number
- CN200969692Y CN200969692Y CNU2006200539874U CN200620053987U CN200969692Y CN 200969692 Y CN200969692 Y CN 200969692Y CN U2006200539874 U CNU2006200539874 U CN U2006200539874U CN 200620053987 U CN200620053987 U CN 200620053987U CN 200969692 Y CN200969692 Y CN 200969692Y
- Authority
- CN
- China
- Prior art keywords
- lead
- triode
- resistance
- diode
- led driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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]
Abstract
A LED driver comprises a bridge circuit which is connected with a first conductor and a second conductor and the ends are respectively connected with two ends of a transformer T; the first conductor is connected with the second conductor through a steady current circuit and a similar capacitor circuit9the resistance R2 of the steady current circuit is connected with the 4th conductor, the base of the triode Q2 is connected with the 4th conductor, the emitter of the triode Q2 is connected with the second conductor, the collector of the triode Q2 is connected with the third conductor; a 5th conductor are arranged between the collector of the triode Q2 of the similar capacitor circuit and the second conductor, the 5th conductor is orderly connected with an electrolytic capacitance C2, a diode D6, a capacitance C1 and a resistance R3; the output of the transformer T is connected with a plurality of LEDs; Adjusting resistance size of the resistance R2 can drive different quantitative LEDs.
Description
Technical field
The utility model relates to a kind of led driver, relates in particular to a kind of led driver of the LED driving light source as decorative lamp.
Background technology
In the prior art, generally all be to come the driven for emitting lights diode (LED) with Switching Power Supply, the light fixture class is had relatively high expectations for harmonic current, and therefore when doing the EMC test, the harmonic current test all can't pass, so do not reach the EMC requirement of standards such as European TUV.
During with existing Switching Power Supply driving LED,, come current limliting so must add resistance, thereby influence useful life and the producing process complexity of LED in the LED front because output voltage is a constant voltage.
Summary of the invention
The purpose of this utility model is to provide a kind of led driver of the LED driving light source as decorative lamp.
For achieving the above object, the utility model provides a kind of led driver, it comprises a zero line and a live wire, be connected an inductance L 1, L2 respectively on this zero line and the live wire, the output of this inductance L 1, L2 is connected 1 end and 3 ends of a bridge circuit of being made up of four diode D1,2 ends of this bridge circuit are connected one first lead and one second lead respectively with 4 ends, and the end of this first lead and second lead is connected to the two ends of a transformer T;
Connect a triode Q1, a constant-current circuit and a class condenser network between this first lead and second lead,
The base stage of this triode Q1 is connected on this first lead by a privates, and the emitter of this triode Q1 is connected on this second lead by privates, and the collector electrode of this triode Q1 is connected on this second lead;
This constant-current circuit comprises a resistance R 2, a triode Q2, a diode D5, this resistance R 2 is connected on these privates, the base stage of this triode Q2 is connected on these privates between the resistance R2 and triode Q1 emitter, the emitter of this triode Q2 is connected on this second lead, the collector electrode of this triode Q2 is connected on this privates, and this diode D5 is connected between triode Q2 base stage and the privates;
Such condenser network comprises a resistance R 3, a capacitor C 1, a diode D6, a diode D7, an electrochemical capacitor C2, be provided with one the 5th lead between this triode Q2 collector electrode and this second lead 5, the node of the 5th lead and second lead is between these bridge circuit 4 ends and triode Q2 emitter, connect this electrochemical capacitor C2, diode D6, capacitor C 1, resistance R 3 on the 5th lead successively, this diode D7 one end is connected between this electrochemical capacitor C2, the diode D6, and the other end is connected between this resistance R 3, the triode Q2 collector electrode;
The both sides of the output of this transformer T connect several LEDs;
Adjust the resistance size of the resistance R 2 of this constant-current circuit, can drive the LED of varying number.
The utlity model has following beneficial effect: existing Switching Power Supply is as led driver, when doing the EMC test, can't pass during the harmonic current test, and the utility model led driver, replace existing filter circuit with the class condenser network, do EMC test harmonic current and can pass through; During with existing Switching Power Supply driving LED, must add the resistance current limliting in the LED front, therefore the utility model driver can directly meet LED owing to be connected with constant-current circuit, need not add resistance, and the useful life and the producing process that have prolonged LED are simple.
Description of drawings
Fig. 1 is the circuit diagram of the utility model led driver.
Embodiment
See also Fig. 1, a kind of led driver, it comprises a zero line 1 and a live wire 2, be connected an inductance L 1, L2 respectively on this zero line 1 and the live wire 2, connect an inferior quick resistance VR1 between this inductance L 1 output and inductance L 2 inputs, the output of this inductance L 1 and L2 is connected 1 end and 3 ends of a bridge circuit 3 of being made up of four diode D1, and 2 ends of this bridge circuit are connected one first lead 4 and one second lead 5 respectively with 4 ends.The end of this first lead 4 and second lead 5 is connected to the two ends of a transformer T, on second lead 5 at bridge circuit 4 ends to being connected with a ceramic disc capacitor C4 between the transformer T.The both sides of this transformer T input are connected with two reverse diode D10, D12 between this first lead 4 and second lead 5.
Connect a resistance R 1, a triode Q1, a constant-current circuit and a class condenser network between this first lead 4 and second lead 5.
The base stage of this triode Q1 is connected on this first lead 4 by a privates 8, this resistance R 1 is connected on this privates 8, the emitter of this triode Q1 is connected on this second lead 5 by privates 9, and the collector electrode of this triode Q1 is connected between these second lead, 5 upper porcelain slice capacitor C 4, the transformer T.
This constant-current circuit comprises a resistance R 2, a triode Q2, a diode D5, this resistance R 2 is connected on these privates 9, the base stage of this triode Q2 is connected on these privates 9 between the resistance R2 and triode Q1 emitter, the emitter of this triode Q2 is connected on this second lead 5, the collector electrode of this triode Q2 is connected between the base stage of resistance R1 and triode Q1 on this privates 8, and this diode D5 is connected between triode Q2 base stage and the privates 9.
Such condenser network comprises a resistance R 3, a capacitor C 1, a diode D6, a diode D7, an electrochemical capacitor C2.Be provided with one the 5th lead 10 between this triode Q2 collector electrode and this second lead 5, the node of the 5th lead 10 and second lead 5 connects this electrochemical capacitor C2, diode D6, capacitor C 1, resistance R 3 successively on the 5th lead 10 between these bridge circuit 4 ends and triode Q2 emitter.Be connected a resistance between the 5th lead 10 and this second lead 5, this resistance one end is connected between this diode D6 and the capacitor C 1, the other end be connected this triode Q2 emitter and the 5th lead 10 respectively with two nodes that this second lead 5 links to each other between.This diode D7 one end is connected between this electrochemical capacitor C2, the diode D6, and the other end is connected between this resistance R 3, the triode Q2 collector electrode.
The both sides of the output of this transformer T connect one the 6th lead 11 and one the 7th lead 12, connect a diode D8 on the 6th lead, connect between this live wire 2 and the 7th lead 12 and connect two safety capacitor C 5, C6 on one the 8th lead, 13, the eight leads 13.Be connected several LEDs on the 6th lead 11 and the 7th lead 12, be respectively equipped with the electrochemical capacitor C3 of a parallel connection and the D11 of a parallel connection between the 6th lead 11 and the 7th lead 12.
Adjust the resistance size of the resistance R 2 of this this constant-current circuit, can drive the LED of varying number, can mate 8 LED when for example R2 is 36R, can mate 16 LED when R2 is 17.4R or mate 32 LED.
Existing Switching Power Supply is as led driver, and when doing the EMC test, harmonic current can't pass, and the utility model led driver replaces existing filter circuit with the class condenser network, does EMC test harmonic current can pass through; During with existing Switching Power Supply driving LED, must add the resistance current limliting in the LED front, therefore the utility model driver can directly meet LED owing to be connected with constant-current circuit, need not add resistance, and the useful life and the producing process that have prolonged LED are simple.
Claims (10)
1, a kind of led driver, it comprises a zero line and a live wire, be connected an inductance (L1, L2) respectively on this zero line and the live wire, the output of this inductance (L1, L2) is connected (1) end and (3) end of a bridge circuit of being made up of four diodes (D1), (2) end of this bridge circuit is connected one first lead and one second lead respectively with (4) end, and the end of this first lead and second lead is connected to the two ends of a transformer (T); It is characterized in that:
Connect a triode (Q1), a constant-current circuit and a class condenser network between this first lead and second lead;
The base stage of this triode (Q1) is connected on this first lead by a privates, and the emitter of this triode (Q1) is connected on this second lead by privates, and the collector electrode of this triode (Q1) is connected on this second lead;
This constant-current circuit comprises a resistance (R2), a triode (Q2), a diode (D5), this resistance (R2) is connected on these privates, the base stage of this triode (Q2) is connected between resistance on these privates (R2) and triode (Q1) emitter, the emitter of this triode (Q2) is connected on this second lead, the collector electrode of this triode (Q2) is connected on this privates, and this diode (D5) is connected between triode (Q2) base stage and the privates;
Such condenser network comprises a resistance (R3), one electric capacity (C1), one diode (D6), one diode (D7), one electrochemical capacitor (C2), be provided with one the 5th lead between this triode (Q2) collector electrode and this second lead, the node of the 5th lead and second lead is between this bridge circuit (4) end and triode (Q2) emitter, connect this electrochemical capacitor (C2) on the 5th lead successively, diode (D6), electric capacity (C1), resistance (R3), this diode (D7) end is connected this electrochemical capacitor (C2), between the diode (D6), the other end is connected this resistance (R3), between triode (Q2) collector electrode;
The both sides of the output of this transformer (T) connect several light-emitting diodes (LED)
Adjust the resistance size of the resistance (R2) of this this constant-current circuit, can drive the light-emitting diode (LED) of varying number.
2, led driver according to claim 1 is characterized in that: connect a piezo-resistance (VR1) between this inductance (L1) output and inductance (L2) input.
3, led driver according to claim 1 is characterized in that: hold at bridge circuit (4) on second lead to be connected with a ceramic disc capacitor (C4) between the transformer (T).
4, led driver according to claim 1 is characterized in that: connect a resistance (R1) between this first lead and second lead, this resistance (R1) is connected on this privates.
5, led driver according to claim 1 is characterized in that: the collector electrode of this triode (Q1) is connected between this second lead upper porcelain slice electric capacity (C4), the transformer (T).
6, led driver according to claim 4 is characterized in that: the collector electrode of this triode (Q2) is connected between the base stage of resistance on this privates (R1) and triode (Q1).
7, led driver according to claim 1, it is characterized in that: be connected a resistance between the 5th lead and this second lead, this resistance one end is connected between this diode (D6) and the electric capacity (C1), the other end be connected this triode (Q2) emitter and the 5th lead respectively with two nodes that this second lead links to each other between.
8, led driver according to claim 1 is characterized in that: the both sides of the output of this transformer (T) connect one the 6th lead and one the 7th lead, connect a diode (D8) on the 6th lead.
9, led driver according to claim 8 is characterized in that: connect one the 8th lead between this live wire and the 7th lead, connect two safety electric capacity (C5), (C6) on the 8th lead.
10, led driver according to claim 8 is characterized in that: be respectively equipped with the electrochemical capacitor (C3) of a parallel connection and (D11) of a parallel connection between the 6th lead and the 7th lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200539874U CN200969692Y (en) | 2006-01-18 | 2006-01-18 | LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200539874U CN200969692Y (en) | 2006-01-18 | 2006-01-18 | LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200969692Y true CN200969692Y (en) | 2007-10-31 |
Family
ID=38969268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200539874U Expired - Fee Related CN200969692Y (en) | 2006-01-18 | 2006-01-18 | LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200969692Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010403A (en) * | 2014-06-17 | 2014-08-27 | 中山市领航光电科技有限公司 | Novel LED lighting driver |
| CN105848351A (en) * | 2016-05-09 | 2016-08-10 | 陈文军 | Compatible LED circuit |
-
2006
- 2006-01-18 CN CNU2006200539874U patent/CN200969692Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010403A (en) * | 2014-06-17 | 2014-08-27 | 中山市领航光电科技有限公司 | Novel LED lighting driver |
| CN105848351A (en) * | 2016-05-09 | 2016-08-10 | 陈文军 | Compatible LED circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 |