CN201846510U - LED driving power source for illumination - Google Patents
LED driving power source for illumination Download PDFInfo
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- CN201846510U CN201846510U CN2010206061909U CN201020606190U CN201846510U CN 201846510 U CN201846510 U CN 201846510U CN 2010206061909 U CN2010206061909 U CN 2010206061909U CN 201020606190 U CN201020606190 U CN 201020606190U CN 201846510 U CN201846510 U CN 201846510U
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Abstract
The utility model relates to an LED driving power source for illumination, which comprises a rectifier bridge formed by four diodes, wherein one side of the rectifier bridge is connected with a voltage input end; a third resistor, a first capacitor and a second capacitor are connected with an output end at the other side of the rectifier bridge; a G end of a constant current source chip is connected with an output end of the rectifier bridge and is in ground connection; a V end is connected with the other output end of the rectifier bridge; a C end is a positive output end; an S end is used as a negative output end after being connected with a first inductance in series; a first resistor and a second resistor are connected between the V end and the C end; a fifth diode is connected between the V end and the S end; a third capacitor is connected between the positive output end and the negative output end; one side of the rectifier bridge connected with the voltage input end is connected with a resonant capacitor in series; a first series resistor and a second series resistor are connected with the resonant capacitor in series after being connected in parallel, then are connected with the resonant capacitor in parallel; a second diode is connected with a fourth capacitor in parallel; and a third diode is connected with a fifth capacitor in parallel. The LED driving power source solves the problem that an electronic transformer can not work normally and the LED flickering problem, therefore, the power source can be used more effectively.
Description
Technical field
The utility model relates to the driving power field, relates in particular to the driving power that is applicable to illuminating LED.
Background technology
Under the background that the worry of current global energy shortage raises once again, energy savings is the major issue that will face future.At lighting field, the application of LED luminous product is just attracting common people's sight, LED is as a kind of novel green light source product, having high energy-conservation (the equal illumination effect is more energy-conservation more than 80% than conventional light source), a long-life (can reach 60,000 to 100,000 hours useful life, longer more than 10 times than the conventional light source life-span) etc. good characteristic, must be developing tendency in future.So the driving power of LED as the core of LED illuminator, has also just had higher requirement to aspects such as its conversion efficiency, the adjusting of output current intelligence, cost, reliabilities.
The circuit of existing illuminating LED driving power product as shown in Figure 1.Fig. 1 is the circuit theory diagrams that drive 3 1W white light LEDs, and this circuit is a 12V voltage AC/DC.Wherein diode D1～D4 forms rectifier bridge, and this rectifier bridge has two functions, and the one, when input is AC power, AC rectification is become direct current; The 2nd, when input is DC power supply, play the polar switching effect, regardless of the polarity of importing power supply, can both guarantee the circuit operate as normal.Filter capacitor C1 becomes level and smooth direct current to the pulsation DC converting.The absolute precision of sample resistance R1 decision constant-current source.The pulse current of ballast inductance L1 handle is transformed into triangular current, and the inductance value of ballast inductance L1 can influence the stability of constant-current source in the operating voltage range.Sustained diode 5 provides discharge loop for the electric current that is stored in the inductance when the inner metal-oxide-semiconductor of constant-current source chip U1 (PT4115) is in cut-off state.Owing to be operated in the high-frequency impulse state, sustained diode 5 should select for use forward voltage drop little, the Schottky diode that resume speed is fast.The D of constant-current source chip U1 (PT4115) end can external pwm pulse or direct voltage light modulation, can connect also that thermistor is done auxiliary temperature control and auto brightness is controlled.If without these functions, then the D port is unsettled.
Because the high-frequency electronic transformer of Halogen lamp LED special use needs the pure resistive load could reliably working, so and to adopt the LED power supply shot-light of foregoing circuit at present be that capacitive load causes the electronic transformer cisco unity malfunction, LED can glimmer.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, thereby another kind of illuminating LED driving power is provided, compatible problem between the high-frequency electronic transformer of solution illuminating LED power supply and Halogen lamp LED special use.
The technical solution of the utility model is as follows:
A kind of illuminating LED driving power, comprise the rectifier bridge of forming by first diode, second diode, the 3rd diode and the 4th diode, one side of described rectifier bridge connects voltage input end, connects the 3rd resistance, first electric capacity and second electric capacity respectively between two outputs of opposite side; The G of constant-current source chip end is connected with an output of described rectifier bridge and ground connection, and its V end is connected with another output of described rectifier bridge, and its C holds the positive output end as led light source, and its S holds behind first inductance of connecting the negative output terminal as led light source; First resistance and second resistance are connected between the V end and C end of described constant-current source chip, and the 5th diode is connected between the V end and S end of described constant-current source chip; The 3rd electric capacity is connected between the positive-negative output end of led light source; The side series resonance electric capacity that described rectifier bridge is connected with voltage input end, first series resistance is connected with resonant inductance the back side by side with second series resistance, and is whole then in parallel with described resonant capacitance; The described second diode two ends electric capacity that is locked in a tie for fourth, described the 3rd diode two ends electric capacity that is locked in a tie for fifth.
Its further technical scheme is: described voltage input end be input as 12V AC/DC voltage.
And its further technical scheme is: the model of described constant-current source chip is PT4115.
Useful technique effect of the present utility model is:
Circuit structure of the present utility model is simple and reliable, and is with low cost, and by 3 improvement means: (1) power supply inputs to the resistance that connects in series before the big electric capacity; (2) power supply is connected in series the LC resonant network before inputing to big electric capacity; (3) power supply is connected in series the capacitance boost network before inputing to big electric capacity.Realized pure resistive load, solved the electronic transformer cisco unity malfunction, the problem that LED can glimmer has increased power supply and has effectively utilized.
Description of drawings
Fig. 1 is the circuit diagram of existing illuminating LED driving power.
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
As shown in Figure 2, the utility model comprises the rectifier bridge of being made up of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, one side of rectifier bridge connects 12V AC/DC voltage, connects the 3rd resistance R 3, first capacitor C 1 and second capacitor C 2 between two outputs of opposite side respectively.The G end of constant-current source chip U1 is connected with an output of rectifier bridge and ground connection, and its V end is connected with another output of rectifier bridge, and its C end is as the positive output end of led light source, and its S end series connection first inductance L 1 back is as the negative output terminal of led light source.Be used to connect 3 1W white light LEDs that driven between the positive-negative output end of led light source.First resistance R 1 and second resistance R 2 are connected between the V end and C end of constant-current source chip U1.The 5th diode D5 is connected between the V end and S end of constant-current source chip U1.The 3rd capacitor C 3 is connected between the positive-negative output end of led light source.The side series resonance capacitor C J that rectifier bridge is connected with 12V AC/DC voltage, the first series resistance RJ0 connects with resonant inductance LJ the back side by side with the second series resistance RJ1, whole (seeing A portion among Fig. 2) in parallel with described resonant capacitance CJ then.Second diode D2 two ends capacitor C 4, the three diode D3 two ends capacitor C 5 (seeing B portion among Fig. 2) that is locked in a tie for fifth that is locked in a tie for fourth.
Above-described components and parts are the commercial goods, and the marque among the embodiment can see table:
Main components and parts table among Fig. 2:
| Sequence number | The components and parts code name | The components and parts type | Component parameter or |
| 1 | D1～D5 | Diode | SS14 |
| 2 | R1 | Resistance | 0.3 |
| 3 | R2 | Resistance | 1Ω |
| 4 | R3 | Resistance | 10KΩ |
| 5 | RJ0、RJ1 | Resistance | 0.5Ω |
| 6 | C1 | Electric capacity | 470uF/25V |
| 7 | C2 | Electric capacity | 4.7 |
| 8 | C3 | Electric capacity | 4.7uF/25V |
| 9 | C4、C5 | Electric capacity | 100pF |
| 10 | CJ | Electric capacity | 100pF |
| 11 | L1 | Inductance | 47uH |
| 12 | LJ | Inductance | 1uH |
| 13 | U1 | The constant-current source chip | PT4115 |
Above-described only is preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from spirit of the present utility model and design, all should think to be included within the protection range of the present utility model.
Claims (3)
1. illuminating LED driving power, comprise the rectifier bridge of forming by first diode (D1), second diode (D2), the 3rd diode (D3) and the 4th diode (D4), one side of described rectifier bridge connects voltage input end, connects the 3rd resistance (R3), first electric capacity (C1) and second electric capacity (C2) between two outputs of opposite side respectively; The G end of constant-current source chip (U1) is connected with an output of described rectifier bridge and ground connection, its V end is connected with another output of described rectifier bridge, its C end is as the positive output end of led light source, and its S end series connection first inductance (L1) back is as the negative output terminal of led light source; First resistance (R1) and second resistance (R2) are connected between the V end and C end of described constant-current source chip (U1), and the 5th diode (D5) is connected between the V end and S end of described constant-current source chip (U1); The 3rd electric capacity (C3) is connected between the positive-negative output end of led light source; It is characterized in that:
The side series resonance electric capacity (CJ) that described rectifier bridge is connected with voltage input end, first series resistance (RJ0) is connected with resonant inductance (LJ) back side by side with second series resistance (RJ1), and is whole then in parallel with described resonant capacitance (CJ);
Described second diode (D2) the two ends electric capacity (C4) that is locked in a tie for fourth, described the 3rd diode (D3) the two ends electric capacity (C5) that is locked in a tie for fifth.
2. according to the described illuminating LED driving power of claim 1, it is characterized in that: described voltage input end be input as 12V AC/DC voltage.
3. according to the described illuminating LED driving power of claim 1, it is characterized in that: the model of described constant-current source chip (U1) is PT4115.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206061909U CN201846510U (en) | 2010-11-12 | 2010-11-12 | LED driving power source for illumination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206061909U CN201846510U (en) | 2010-11-12 | 2010-11-12 | LED driving power source for illumination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201846510U true CN201846510U (en) | 2011-05-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206061909U Expired - Fee Related CN201846510U (en) | 2010-11-12 | 2010-11-12 | LED driving power source for illumination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201846510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910016A (en) * | 2016-04-29 | 2016-08-31 | 四川蓝景光电技术有限责任公司 | LED light source used on side face of ultrathin lamp box of 8-20 cm |
-
2010
- 2010-11-12 CN CN2010206061909U patent/CN201846510U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910016A (en) * | 2016-04-29 | 2016-08-31 | 四川蓝景光电技术有限责任公司 | LED light source used on side face of ultrathin lamp box of 8-20 cm |
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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 |
Granted publication date: 20110525 Termination date: 20151112 |
|
| EXPY | Termination of patent right or utility model |