CN203167365U - LED driving power supply characterized by primary side feedback - Google Patents
LED driving power supply characterized by primary side feedback Download PDFInfo
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- CN203167365U CN203167365U CN 201320149213 CN201320149213U CN203167365U CN 203167365 U CN203167365 U CN 203167365U CN 201320149213 CN201320149213 CN 201320149213 CN 201320149213 U CN201320149213 U CN 201320149213U CN 203167365 U CN203167365 U CN 203167365U
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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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Abstract
The utility model relates to the LED driving power supply field and especially relates to an LED driving power supply characterized by primary side feedback. The LED driving power supply comprises a power supply circuit, a flyback topology circuit, a reliability protection circuit and a primary side feedback circuit. The power supply circuit is connected with the reliability protection circuit. The reliability protection circuit is connected with the flyback topology circuit. The flyback topology circuit is connected with the primary side feedback circuit. By adopting the above-mentioned technical scheme, the LED driving power supply can save optical couplers and other feedback circuits. The space of a power board is further saved. The cost is lowered. The LED driving power supply with a simple structure further enhances the power supply reliability.
Description
Technical field
The present invention relates to LED driving power field, particularly the LED driving power of a kind of former limit feedback.
Background technology
(Light Emitting Diode LED), is a kind of semiconductor subassembly to light-emitting diode, is a kind of solid-state semiconductor device.Semiconductor wafer is made up of two parts, and a part is P type semiconductor, occupies an leading position in its hole, the inside, and the other end is N type semiconductor, mainly is electronics here.But when these two kinds of semiconductors couple together, just form one " P-N knot " between them.When electric current acted on this wafer by lead, electronics will be pushed to the P district, and electronics will send energy with the form of photon, the luminous principle of LED that Here it is then with hole-recombination in the P district.And the LED light wavelength color of light just is to be determined by the material that forms the P-N knot.Initial LED is used as indicator light, display panel etc. more; Along with the appearance of white light LEDs, also be used as illumination.It is described as the new type light source of 21 century, has the efficient height, and the life-span is long, not conventional light source such as cracky advantage that can't compare with it.When adding forward voltage, light-emitting diode can send monochrome, discontinuous light, and this is a kind of of electroluminescent effect.Change the chemical composition of the semi-conducting material that adopts, can make light-emitting diode be emitted near ultraviolet ray, visible light or ultrared light.
Under the global energy background that extremely worry of shortage raises once again, energy savings is the major issue that we shall face future, and particularly at lighting field, the application of LED luminous product is just attracting common people's sight.LED must be developing tendency in future as a kind of novel green light source product, and it is the novel illumination light source epoch of representative that 21st century will enter with LED.LED light fixture and incandescent lamp are relatively, its maximum motive force of development is exactly advantages of energy saving and environmental protection, but since cost too high, cause price than conventional lamp height several class, allow the consumer really consume with all one's heart, also need under the prerequisite of guaranteed quality, the price of product further descend.
The key of existing restriction LED lamp life is flimsy driving power, thus the good bad influence of driving power the application of LED light fixture.Because current LED illumination does not also form regular standard, exists bigger difference in existing LED driving power design process.
There is the bad competition reduce cost on the domestic market, in driving power, generally adopts resistance-capacitance depressurization and non-isolation scheme, cause power source performance bad and influence life-span and the safety of LED light fixture.And the overseas market is subjected to strict authentication requesting, most of isolation scheme that adopts optocoupler to add pressurizer.But adopt that photoelectricity is isolated the cost height, volume is big and complex structure and power supply construction cycle long.
Summary of the invention
Goal of the invention of the present utility model is to provide the LED driving power of a kind of former limit feedback, use the technical solution of the utility model, can save optocoupler and other feedback circuit, save the power panel space, reduced cost, simple in structure and improve the reliability of power supply.
In order to realize the foregoing invention purpose, complete skill scheme of the present utility model is:
The LED driving power of a kind of former limit feedback comprises: power-supplying circuit, anti-sharp topological circuit, reliability protective circuit, former limit feedback circuit; Power-supplying circuit connection reliability protective circuit; The reliability protective circuit connects the anti-topological circuit that swashs; Anti-sharp topological circuit connects former limit feedback circuit.
Optionally, power-supplying circuit comprises rectifier bridge, first filter capacitor, the 3rd filter capacitor, first resistance, second resistance and second diode; Rectifier bridge connects first filter capacitor and first resistance simultaneously; Second resistance connects second diode and the 3rd filter capacitor simultaneously.
Optionally, describedly anti-swash topological circuit and comprise high frequency transformer, fly-wheel diode; High frequency transformer connects fly-wheel diode.
Optionally, described reliability protective circuit comprises the 3rd resistance, the 5th resistance, the 6th resistance, second filter capacitor, the 4th filter capacitor, first diode; Described the 5th resistance string is associated between described second diode and the 6th resistance; The 4th filter capacitor connects the 6th resistance; First diode connects the 3rd resistance and second filter capacitor simultaneously.
Optionally, described former limit feedback circuit comprises the 5th filter capacitor, the 4th resistance, the 7th resistance; The 5th filter capacitor connects fly-wheel diode; The 7th resistance two ends are connected the two ends of described the 5th filter capacitor; The 4th resistance connects the 4th filter capacitor.
Therefore the source power supply circuits swash that topological circuit provides the stable power supply and by former limit feedback circuit control output constant current for anti-, and the reliability protective circuit is that power supply is protected when breaking down simultaneously.Use the present embodiment technical scheme, can save optocoupler and other feedback circuit, save the power panel space, reduced cost, simple in structure and improve the reliability of power supply.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The circuit diagram that Fig. 1 provides for the embodiment of the invention 1
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiment 1:
As shown in Figure 1, present embodiment discloses the LED driving power of a kind of former limit feedback, comprising: power-supplying circuit, anti-sharp topological circuit, reliability protective circuit, former limit feedback circuit; Power-supplying circuit connection reliability protective circuit; The reliability protective circuit connects the anti-topological circuit that swashs; Anti-sharp topological circuit connects former limit feedback circuit.
Concrete, power-supplying circuit comprises rectifier bridge BD1, the first filter capacitor C1, the 3rd filter capacitor C3, first resistance R 1, second resistance R 2 and the second diode D2; Rectifier bridge connects the first filter capacitor C1 and first resistance R 1 simultaneously; Second resistance R 2 connects the second diode D2 and the 3rd filter capacitor C3 simultaneously.
Concrete, instead swash topological circuit and comprise high frequency transformer T1, sustained diode 3; High frequency transformer T1 connects sustained diode 3.
Concrete, the reliability protective circuit comprises the 3rd resistance R 3, the 5th resistance R 5, the 6th resistance R 6, the second filter capacitor C2, the 4th filter capacitor C4, the first diode D1; The 5th resistance R 5 is connected between the second diode D2 and the 6th resistance R 6; The 4th filter capacitor C4 connects the 6th resistance R 6; The first diode D1 connects the 3rd resistance R 3 and the second filter capacitor C2 simultaneously.
Concrete, former limit feedback circuit comprises the 5th filter capacitor C5, the 4th resistance R 4, the 7th resistance R 7; The 5th filter capacitor C5 connects sustained diode 3; The 7th resistance R 7 two ends are connected the two ends of the 5th filter capacitor C5; The 4th resistance R 4 connects the 4th filter capacitor C4.
As shown in Figure 1, concrete use for clear statement present embodiment, the concrete scheme of present embodiment is used on the basis of the former limit control of the PSR (Primary Side Regulation) of the FSEZ1317 that provides in million companies that fly solution, and the input power is 7W.
Power-supplying circuit is converted into DC power supply by rectifier bridge BD1, the first filter capacitor C1 with the input AC electricity, for chip provides starting resistor, the 3rd filter capacitor C3, second resistance R 2 and the second diode D2 provide lasting power supply power supply by the auxiliary winding NA of high frequency transformer T1 for chip simultaneously by first resistance R 1.
Anti-swash topological circuit and is formed by high frequency transformer T1 and sustained diode 2, store and release energy in the switching tube turn-on and turn-off stage, play the effect of energy transmission.
The reliability protective circuit is formed the circuit that absorbs metal-oxide-semiconductor voltage peak point by the 3rd resistance R 3, the second filter capacitor C2, the first diode D1, prevents that metal-oxide-semiconductor from damaging.The 5th resistance R 5, the protection action when the 6th resistance R 6 is controlled power supply output short-circuit faults and open fault, and the 4th filter capacitor C4 is mainly the effect of affording redress of chip internal amplifier.
The control that former limit feedback circuit keeps output ripple voltage by the 5th filter capacitor C5, the 7th resistance R 7, chip detection is by the 4th resistance R 4 both end voltage, through the feedback control loop of inner peak detection circuit systems stabilisation, the turn-on and turn-off time of regulating elementary winding keeps the stable of output current.
Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills namely can understand and implement under the situation of not paying performing creative labour.
Above-described execution mode does not constitute the restriction to this technical scheme protection range.Any at above-mentioned execution mode spirit and principle within do modification, be equal to and replace and improvement etc., all should be included within the protection range of this technical scheme.
Claims (5)
1. the LED driving power of a former limit feedback is characterized in that, comprising:
Power-supplying circuit, anti-sharp topological circuit, reliability protective circuit, former limit feedback circuit;
Power-supplying circuit connection reliability protective circuit;
The reliability protective circuit connects the anti-topological circuit that swashs;
Anti-sharp topological circuit connects former limit feedback circuit.
2. the LED driving power of a kind of former limit as claimed in claim 1 feedback is characterized in that:
Described power-supplying circuit comprises rectifier bridge, first filter capacitor, the 3rd filter capacitor, first resistance, second resistance and second diode;
Described rectifier bridge connects first filter capacitor and first resistance simultaneously;
Described second resistance connects second diode and the 3rd filter capacitor simultaneously.
3. the LED driving power of a kind of former limit as claimed in claim 2 feedback is characterized in that:
Described anti-sharp topological circuit comprises high frequency transformer, fly-wheel diode;
High frequency transformer connects fly-wheel diode.
4. the LED driving power of a kind of former limit as claimed in claim 3 feedback is characterized in that:
Described reliability protective circuit comprises the 3rd resistance, the 5th resistance, the 6th resistance, second filter capacitor, the 4th filter capacitor, first diode;
Described the 5th resistance string is associated between described second diode and the 6th resistance;
The 4th filter capacitor connects the 6th resistance;
First diode connects the 3rd resistance and second filter capacitor simultaneously.
5. the LED driving power of a kind of former limit as claimed in claim 4 feedback is characterized in that:
Described former limit feedback circuit comprises the 5th filter capacitor, the 4th resistance, the 7th resistance;
The 5th filter capacitor connects fly-wheel diode;
The 7th resistance two ends are connected the two ends of described the 5th filter capacitor;
The 4th resistance connects the 4th filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149213 CN203167365U (en) | 2013-03-28 | 2013-03-28 | LED driving power supply characterized by primary side feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149213 CN203167365U (en) | 2013-03-28 | 2013-03-28 | LED driving power supply characterized by primary side feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203167365U true CN203167365U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149213 Expired - Fee Related CN203167365U (en) | 2013-03-28 | 2013-03-28 | LED driving power supply characterized by primary side feedback |
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| CN (1) | CN203167365U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270009A (en) * | 2014-09-23 | 2015-01-07 | 广东美的制冷设备有限公司 | Multi-output power circuit and air conditioner |
-
2013
- 2013-03-28 CN CN 201320149213 patent/CN203167365U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270009A (en) * | 2014-09-23 | 2015-01-07 | 广东美的制冷设备有限公司 | Multi-output power circuit and air conditioner |
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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 |
Granted publication date: 20130828 Termination date: 20150328 |
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| EXPY | Termination of patent right or utility model |