CN203590516U - 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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- CN203590516U CN203590516U CN201320722842.9U CN201320722842U CN203590516U CN 203590516 U CN203590516 U CN 203590516U CN 201320722842 U CN201320722842 U CN 201320722842U CN 203590516 U CN203590516 U CN 203590516U
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- electric capacity
- resistance
- triode
- power supply
- open loop
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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
Abstract
The utility model 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 is connected with a triode through a resistor; the triode is connected with a driving IC through a resistor; and a plurality of resistors with which capacitors are connected are included. The constant current power supply open loop hiccup protection circuit can effectively protect a driving power supply from being burnt out and smoking, ensure that the driving power supply passes all items of an experimental test and successfully passes safety regulation test authentication, and further ensure normal operation of an LED lamp; and at the same time, the circuit is simple, so that production process is simple, production efficiency is improved, and production costs are reduced.
Description
Technical field
The utility model 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 normally to work.
Summary of the invention
In order to solve above-mentioned existing technical deficiency and defect, the purpose of this utility model is to provide a kind of constant-current supply open loop hiccup protections circuit.
The purpose of this utility model is achieved by the following technical solution:
A constant-current supply open loop hiccup protections circuit, mainly comprises drive IC, 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 11st diode (D11), the 12nd diode (D12), the 2nd triode (Q2) 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 utility model, described the 2nd triode (Q2) is NPN triode.
As the optional technical scheme of the utility model, described drive IC (U1) can adopt SA7525, also can adopt SN03A.
In sum, constant-current supply open loop hiccup protections circuit provided by the utility model, the beneficial effect having:
1, effectively protect driving power can not be burned and smolder, further guarantee that LED light fixture normally works.
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 the utility model open loop hiccup protections circuit.
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, the technical solution of the utility model is described in further detail.Followingly with reference to accompanying drawing, the explanation of execution mode of the present utility model is intended to present general inventive concept of the present utility model to make an explanation, and does not should be understood to a kind of restriction of the present utility model.
Shown in seeing figures.1.and.2, the utility model 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 utility model, 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 utility model, the electric current of described optocoupler secondary (U3B) is along with Voltage-output changes and changes.When optocoupler secondary (U3B) is normally worked, 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 is normally worked, if fault exists, power supply is proceeded protection action; back and forth go down, occur hiccup protections state.
In the utility model, 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 that LED light fixture normally works.
The above embodiment has only expressed preferred implementation of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims and embodiment.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (3)
1. a constant-current supply open loop hiccup protections circuit, mainly comprises drive IC, 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 11st diode (D11), the 12nd diode (D12), the 2nd triode (Q2) 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. constant-current supply open loop hiccup protections circuit according to claim 1, is characterized in that, described the 2nd triode (Q2) is NPN triode.
3. constant-current supply open loop hiccup protections circuit according to claim 1, is characterized in that, described drive IC (U1) can adopt SA7525, also can adopt SN03A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320722842.9U CN203590516U (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320722842.9U CN203590516U (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590516U true CN203590516U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320722842.9U Expired - Fee Related CN203590516U (en) | 2013-11-13 | 2013-11-13 | Constant current power supply open loop hiccup protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203590516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582207A (en) * | 2013-11-13 | 2014-02-12 | 深圳市东方之星电源有限公司 | Constant current power supply open loop hiccup protection circuit |
-
2013
- 2013-11-13 CN CN201320722842.9U patent/CN203590516U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582207A (en) * | 2013-11-13 | 2014-02-12 | 深圳市东方之星电源有限公司 | Constant current power supply open loop hiccup protection circuit |
| WO2015070492A1 (en) * | 2013-11-13 | 2015-05-21 | 深圳市东方之星电源有限公司 | Open-loop hiccup protective circuit of constant-current power supply |
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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: 20140507 Termination date: 20161113 |