CN103582207A - Constant current power supply open loop hiccup protection circuit - Google Patents
Constant current power supply open loop hiccup protection circuit Download PDFInfo
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- CN103582207A CN103582207A CN201310571178.7A CN201310571178A CN103582207A CN 103582207 A CN103582207 A CN 103582207A CN 201310571178 A CN201310571178 A CN 201310571178A CN 103582207 A CN103582207 A CN 103582207A
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- triode
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a constant current power supply open loop hiccup protection circuit, and belongs to the technical field of electronic lighting. One end of a diode is connected with a high-frequency transformer, and the other end of the diode is connected with a triode through a resistor; the triode is connected with a drive IC through the resistor; the constant current power supply open loop hiccup protection circuit further comprises a plurality of capacitors and a plurality of resistors, wherein the capacitors and the resistors are connected. The constant current power supply open loop hiccup protection circuit can effectively protect the drive power against burnout and smoking, ensure that the drive power can pass various experimental tests and smoothly pass safety tests and authentication, and further ensure normal work of LED lamps; meanwhile, the circuit is simple, and therefore the production process is simple, production efficiency is improved, and production cost is lowered.
Description
Technical field
The present invention relates to electrical lighting technical field, particularly a kind of constant-current supply open loop hiccup protections circuit.
Background technology
Along with the fast development of LED light fixture technology is increasingly mature with application, the pith that LED driving power can luminescence display as LED light fixture, its technical development is swift and violent.Adding that various countries launch respectively relevant power supply safety standard, wherein fail safe and risk on fire, be that the corresponding light fixture of requirement is done destructive test, and power supply can not be smoldered on fire.
At present LED driving power generally adopts constant-current source to drive, and when carrying out the experiment of optocoupler short/open, driving power loses loop feedback, and output current can be than rated current large several times; In this case, as unprotect, may there is power supply parts prosperous cigarette on fire, cause testing authentication by safety, cause LED light fixture to work.
Summary of the invention
In order to solve above-mentioned existing technical deficiency and defect, the object of the present invention is to provide a kind of constant-current supply open loop hiccup protections circuit.
The object of the invention is by realizing by the following technical solutions:
An open loop hiccup protections circuit, mainly comprises drive IC, several resistance, several electric capacity, diode, triode and high frequency transformer; It is characterized in that: the 4th pin of the anodic bonding high frequency transformer (T1) of described the 11st diode (D11), its negative electrode connects one end of the 51st resistance (R51), and the other end of the 51st resistance (R51) connects one end of the 51st electric capacity (C51), the 52nd resistance (R52); The other end of described the 52nd resistance (R52) connects the C utmost point of the 2nd triode (Q2) simultaneously, one end of the anode of the 12nd diode (D12), the 52nd electric capacity (C52); The negative electrode of described the 12nd diode (D12) connects the 1st pin of drive IC (U1); The other end of described the 52nd electric capacity (C52) connects the other end of the 51st electric capacity (C51) simultaneously, one end of the E utmost point of the 2nd triode (Q2), the 53rd electric capacity (C53); The other end of described the 53rd electric capacity (C53) connects the B utmost point of the 2nd triode (Q2), one end of the 53rd resistance (R53), the 3rd pin of another termination drive IC (U1) of the 53rd resistance (R53).
As the optional technical scheme of the present invention, described the 2nd triode (Q2) is NPN triode.
As the optional technical scheme of the present invention, described drive IC (U1) can adopt SA7525, also can adopt SN03A.
In sum, constant-current supply open loop hiccup protections circuit provided by the present invention, the beneficial effect having:
1, effectively protect driving power can not be burned and smolder, further guarantee the normal operation of LED light fixture.
2, guarantee that driving power passes through every experiment test, tests authentication by safety smoothly.
3, thereby the simple formation of circuit production technology is simple, has improved production efficiency, has reduced production cost.
Accompanying drawing explanation
Fig. 1 is not for increasing the driving power sketch of open loop hiccup protections circuit.
Fig. 2 is the schematic diagram of open loop hiccup protections circuit of the present invention.
Description of reference numerals: U1: drive IC; U3B: optocoupler is secondary; T1: high frequency transformer; D11: the 11st diode; D12: the 12nd diode; R51: the 51st resistance; R52: the 52nd resistance; R53: the 53rd resistance; C51: the 51st electric capacity; C52: the 52nd electric capacity; C53: the 53rd electric capacity; Q2: the 2nd triode.
Embodiment
Below by embodiment also by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.Followingly with reference to accompanying drawing, the explanation of embodiment of the present invention is intended to present general inventive concept of the present invention to make an explanation, and does not should be understood to a kind of restriction of the present invention.
Shown in seeing figures.1.and.2, the invention provides a kind of constant-current supply open loop hiccup protections circuit, comprising: drive IC (U1); optocoupler secondary (U3B), high frequency transformer (T1), the 11st diode (D11); the 12nd diode (D12); the 51st resistance (R51), the 52nd resistance (R52), the 53rd resistance (R53); the 51st electric capacity (C51); the 52nd electric capacity (C52), the 53rd electric capacity (C53), the 2nd triode (Q2).
In the present invention, the 4th pin of the anodic bonding high frequency transformer (T1) of described the 11st diode (D11), its negative electrode connects one end of the 51st resistance (R51), and the other end of the 51st resistance (R51) connects one end of the 51st electric capacity (C51), the 52nd resistance (R52); The other end of described the 52nd resistance (R52) connects the C utmost point of the 2nd triode (Q2) simultaneously, one end of the anode of the 12nd diode (D12), the 52nd electric capacity (C52), and the negative electrode of described the 12nd diode (D12) connects the 1st pin of drive IC (U1); The other end of described the 52nd electric capacity (C52) connects the other end of the 51st electric capacity (C51) simultaneously, one end of the E utmost point of the 2nd triode (Q2), the 53rd electric capacity (C53); The other end of described the 53rd electric capacity (C53) connects the B utmost point of the 2nd triode (Q2), one end of the 53rd resistance (R53), the 3rd pin of another termination drive IC (U1) of the 53rd resistance (R53).
In above-mentioned, described the 2nd triode (Q2) is NPN triode, and described drive IC (U1) is L6562 chip of the same type, as SA7525, and SN03A etc.
In the present invention, the electric current of described optocoupler secondary (U3B) is along with Voltage-output changes and changes.When optocoupler secondary (U3B) works, optocoupler secondary (U3B) has electric current to pass through, when optocoupler secondary (U3B) lost efficacy open circuit when the short circuit of the former limit of optocoupler secondary (U3B) (or), the upper no current of optocoupler secondary (U3B) passes through, the voltage step-down of the tie point of the 53rd resistance (R53) and drive IC (U1) now, the B electrode potential step-down of the 2nd triode (Q2), the 2nd triode (Q2) has conducting to become cut-off, the C utmost point power supply of the 2nd triode (Q2) is by the 11st diode (D11), the 51st resistance (R51) and the 51st electric capacity (C51) form, the C utmost point of the 2nd triode (Q2) becomes high level, and be filled into drive IC (U1) feedback by the 12nd diode (D12), when uprising after level of the tie point of the negative electrode of the 12nd diode (D12) and the 1st pin of drive IC (U1), feed back saturatedly, voltage quits work.After power supply quits work, the 51st electric capacity (C51), the 52nd electric capacity (C52), the 53rd electric capacity (C53) are by the conductive discharge joining with it; After tele-release is complete; the level step-down of the tie point of the 1st pin of the negative electrode of the 12nd diode (D12) and drive IC (U1); power supply restarts; if fault that now optocoupler is secondary (U3B) solves; power supply normal operation, if fault exists, power supply is proceeded protection action; back and forth go down, occur hiccup protections state.
In the present invention, utilize above-mentioned principle can effectively protect driving power can not be burned and smolder, guarantee that driving power passes through every experiment test simultaneously, by safety, test authentication smoothly, further guarantee the normal operation of LED light fixture.
The above embodiment has only expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention and embodiment.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. a constant-current supply open loop hiccup protections circuit, mainly comprises drive IC, several resistance, several electric capacity, diode, triode and high frequency transformer; It is characterized in that:
The 4th pin of the anodic bonding high frequency transformer (T1) of described the 11st diode (D11), its negative electrode connects one end of the 51st resistance (R51), and the other end of the 51st resistance (R51) connects one end of the 51st electric capacity (C51), the 52nd resistance (R52);
The other end of described the 52nd resistance (R52) connects the C utmost point of the 2nd triode (Q2) simultaneously, one end of the anode of the 12nd diode (D12), the 52nd electric capacity (C52);
The negative electrode of described the 12nd diode (D12) connects the 1st pin of drive IC (U1);
The other end of described the 52nd electric capacity (C52) connects the other end of the 51st electric capacity (C51) simultaneously, one end of the E utmost point of the 2nd triode (Q2), the 53rd electric capacity (C53);
The other end of described the 53rd electric capacity (C53) connects the B utmost point of the 2nd triode (Q2), one end of the 53rd resistance (R53), the 3rd pin of another termination drive IC (U1) of the 53rd resistance (R53).
2. according to claim 1, described constant-current supply open loop hiccup protections circuit, is characterized in that, described the 2nd triode (Q2) is NPN triode.
3. according to claim 1, described constant-current supply open loop hiccup protections circuit, is characterized in that, described drive IC (U1) can adopt SA7525, also can adopt SN03A.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571178.7A CN103582207A (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
| PCT/CN2013/088237 WO2015070492A1 (en) | 2013-11-13 | 2013-11-29 | Open-loop hiccup protective circuit of constant-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571178.7A CN103582207A (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103582207A true CN103582207A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310571178.7A Pending CN103582207A (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
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| Country | Link |
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| CN (1) | CN103582207A (en) |
| WO (1) | WO2015070492A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112866048B (en) * | 2019-11-28 | 2023-04-28 | 中盈优创资讯科技有限公司 | Detection method and device for special line of Internet of things |
| CN112994430B (en) * | 2021-02-26 | 2022-03-22 | 西安微电子技术研究所 | Multi-mode combined short-circuit protection circuit and working method and application thereof |
| CN115995791B (en) * | 2023-02-22 | 2023-09-15 | 广东东菱电源科技有限公司 | Short-circuit protection self-recovery circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969883A (en) * | 2012-12-07 | 2013-03-13 | 深圳市核达中远通电源技术有限公司 | Switching power supply burp protection and delay protection circuit |
| CN203590516U (en) * | 2013-11-13 | 2014-05-07 | 深圳市东方之星电源有限公司 | Constant current power supply open loop hiccup protection circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2402005B (en) * | 2001-12-03 | 2005-03-09 | Murata Manufacturing Co | Switching power supply unit |
| CN2882068Y (en) * | 2006-01-13 | 2007-03-21 | 北京动力源科技股份有限公司 | Switch power supply burp protection circuit |
| CN201178507Y (en) * | 2008-04-14 | 2009-01-07 | 曹型勇 | Constant-current automatic light regulating electric source for LED traffic light |
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2013
- 2013-11-13 CN CN201310571178.7A patent/CN103582207A/en active Pending
- 2013-11-29 WO PCT/CN2013/088237 patent/WO2015070492A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969883A (en) * | 2012-12-07 | 2013-03-13 | 深圳市核达中远通电源技术有限公司 | Switching power supply burp protection and delay protection circuit |
| CN203590516U (en) * | 2013-11-13 | 2014-05-07 | 深圳市东方之星电源有限公司 | Constant current power supply open loop hiccup protection circuit |
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| Publication number | Publication date |
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| WO2015070492A1 (en) | 2015-05-21 |
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Application publication date: 20140212 |