CN204408708U - A kind of employing silicon controlled step-down drive circuit - Google Patents
A kind of employing silicon controlled step-down drive circuit Download PDFInfo
- Publication number
- CN204408708U CN204408708U CN201520114646.2U CN201520114646U CN204408708U CN 204408708 U CN204408708 U CN 204408708U CN 201520114646 U CN201520114646 U CN 201520114646U CN 204408708 U CN204408708 U CN 204408708U
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- rectifier bridge
- diode
- output
- led lamp
- lamp group
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a kind of employing silicon controlled step-down drive circuit, comprise AC frequency conversion power supply, it is characterized in that: an output of described AC frequency conversion power supply connects the uplink input end to a rectifier bridge, another output of described AC frequency conversion power supply connects the descending input to rectifier bridge, the output of described rectifier bridge is connected to a series LED lamp group by a VD diode, described VD diode and series LED lamp group loong shunt protective circuit be made up of R3 resistance and controllable silicon, described series LED lamp group takes back the intermediate input end of rectifier bridge by R2 resistance, adopt the benefit of above technical scheme: the utility model forms protective circuit by controllable silicon and R3 resistance, when the electric current flowing through LED is greater than set point, the angle that controlled silicon conducting is certain, thus the electric current in circuit is shunted, LED is made to work in constant current state, thus keep away rabbit series LED lamp group and damage because of instantaneous pressure, simultaneously C2 electric capacity and C3 electric capacity act as filtering.
Description
Technical field
The utility model belongs to LED field, is specifically related to a kind of employing silicon controlled step-down drive circuit.
Background technology
The drive circuit of LED in prior art, lacks the protection to LED group, when being greater than the situation of set point if there is the electric current flowing through LED, automatically cannot adjust, namely there will be the situation of burning LED group.
Summary of the invention
The utility model in order to solve the technical problem mentioned in background technology, then provides a kind of and adopts silicon controlled step-down drive circuit.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of employing silicon controlled step-down drive circuit; comprise AC frequency conversion power supply; it is characterized in that: an output of described AC frequency conversion power supply connects the uplink input end to a rectifier bridge; another output of described AC frequency conversion power supply connects the descending input to rectifier bridge; the output of described rectifier bridge is connected to a series LED lamp group by a VD diode; described VD diode and series LED lamp group loong shunt protective circuit be made up of R3 resistance and controllable silicon, described series LED lamp group takes back the intermediate input end of rectifier bridge by R2 resistance.
An output of described AC frequency conversion power supply first connects a parallel circuits be made up of R1 resistance and C1 electric capacity, then connects the uplink input end to rectifier bridge.
Described rectifier bridge becomes loop by VD1 diode, VD2 diode, VD3 diode and VD4 Diode series.
The output of described rectifier bridge takes back the intermediate input end of rectifier bridge by a C2 electric capacity.
The output of described VD diode also takes back the intermediate input end of rectifier bridge by a C3 electric capacity.
Adopt the benefit of above technical scheme: the utility model forms protective circuit by controllable silicon and R3 resistance; when the electric current flowing through LED is greater than set point; the angle that controlled silicon conducting is certain; thus the electric current in circuit is shunted; LED is made to work in constant current state; thus keep away rabbit series LED lamp group and damage because of instantaneous pressure, simultaneously C2 electric capacity and C3 electric capacity act as filtering.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
See Fig. 1, a kind of employing silicon controlled step-down drive circuit, comprise AC frequency conversion power supply 1, an output of AC frequency conversion power supply 1 connects the uplink input end 3 to a rectifier bridge 2, another output of described AC frequency conversion power supply 1 connects the descending input 4 to rectifier bridge 2, the output 5 of described rectifier bridge 2 is connected to a series LED lamp group 7 by a VD diode 6, described VD diode 6 and series LED lamp group 7 loong shunt protective circuit be made up of R3 resistance 8 and controllable silicon 9, described series LED lamp group 7 takes back the intermediate input end 11 of rectifier bridge 2 by R2 resistance 10.
All parts of the present utility model is explained:
1) output of AC frequency conversion power supply 1 first connects a parallel circuits be made up of R1 resistance 12 and C1 electric capacity 13, then connects the uplink input end 3 to rectifier bridge 2.
2) rectifier bridge 2 is connected into loop by VD1 diode 14, VD2 diode 15, VD3 diode 16 and VD4 diode 17.
3) output 5 of rectifier bridge 2 takes back the intermediate input end 11 of rectifier bridge 2 by a C2 electric capacity 18.
4) output of VD diode 6 also takes back the intermediate input end 11 of rectifier bridge 2 by a C3 electric capacity 19.
Adopt the benefit of above technical scheme: the utility model forms protective circuit by controllable silicon and R3 resistance; when the electric current flowing through LED is greater than set point; the angle that controlled silicon conducting is certain; thus the electric current in circuit is shunted; make LED work in constant current state, thus keep away rabbit series LED lamp group and damage because of instantaneous pressure.
Claims (5)
1. one kind adopts silicon controlled step-down drive circuit, comprise AC frequency conversion power supply (1), it is characterized in that: an output of described AC frequency conversion power supply (1) connects the uplink input end (3) to a rectifier bridge (2), another output of described AC frequency conversion power supply (1) connects the descending input (4) to rectifier bridge (2), the output (5) of described rectifier bridge (2) is connected to a series LED lamp group (7) by a VD diode (6), the protective circuit that described VD diode (6) and series LED lamp group (7) loong shunt one are made up of R3 resistance (8) and controllable silicon (9), described series LED lamp group (7) takes back the intermediate input end (11) of rectifier bridge (2) by R2 resistance (10).
2. one according to claim 1 adopts silicon controlled step-down drive circuit, it is characterized in that: an output of described AC frequency conversion power supply (1) first connects a parallel circuits be made up of R1 resistance (12) and C1 electric capacity (13), then connects the uplink input end (3) to rectifier bridge (2).
3. one according to claim 1 and 2 adopts silicon controlled step-down drive circuit, it is characterized in that: described rectifier bridge (2) is connected into loop by VD1 diode (14), VD2 diode (15), VD3 diode (16) and VD4 diode (17).
4. one according to claim 1 and 2 adopts silicon controlled step-down drive circuit, it is characterized in that: the output (5) of described rectifier bridge (2) takes back the intermediate input end (11) of rectifier bridge (2) by a C2 electric capacity (18).
5. one according to claim 1 and 2 adopts silicon controlled step-down drive circuit, it is characterized in that: the output of described VD diode (6) also takes back the intermediate input end (11) of rectifier bridge (2) by a C3 electric capacity (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114646.2U CN204408708U (en) | 2015-02-17 | 2015-02-17 | A kind of employing silicon controlled step-down drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114646.2U CN204408708U (en) | 2015-02-17 | 2015-02-17 | A kind of employing silicon controlled step-down drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204408708U true CN204408708U (en) | 2015-06-17 |
Family
ID=53432535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520114646.2U Expired - Fee Related CN204408708U (en) | 2015-02-17 | 2015-02-17 | A kind of employing silicon controlled step-down drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204408708U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211462A (en) * | 2016-08-02 | 2016-12-07 | 惠勇 | A kind of automatic protection type LED drive power |
-
2015
- 2015-02-17 CN CN201520114646.2U patent/CN204408708U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211462A (en) * | 2016-08-02 | 2016-12-07 | 惠勇 | A kind of automatic protection type LED drive power |
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Legal Events
| 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: 20150617 Termination date: 20170217 |