CN203813996U - LED lamp driver - Google Patents
LED lamp driver Download PDFInfo
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- CN203813996U CN203813996U CN201320866050.9U CN201320866050U CN203813996U CN 203813996 U CN203813996 U CN 203813996U CN 201320866050 U CN201320866050 U CN 201320866050U CN 203813996 U CN203813996 U CN 203813996U
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- led lamp
- rectifier bridge
- current
- lamp driver
- led
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Abstract
The utility model relates to the LED field and discloses an LED lamp driver. The LED lamp driver comprises a voltage-reducing capacitor, a rectifier bridge, a filtering capacitor and a current-limiting resistor. The direct current output end anode of the rectifier bridge is electrically connected with one end of the current-limiting resistor and the anode of the filtering capacitor. The other end of the current-limiting resistor is electrically connected with the anodes of LED lamps. The direct current output end cathode of the rectifier bridge is electrically connected with the cathode of the filtering capacitor and the cathodes of the LED lamps. One alternating current input end of the rectifier bridge is connected with the voltage-reducing capacitor. By adopting the above-mentioned technical scheme, the LED lamp driver has the advantages of a constant current source for power supplying, low power consumption of the power source, small volume, cost effectiveness, practicality, etc.
Description
Technical field
The utility model relates to LED field, particularly a kind of LED lamp driver.
Background technology
LED(light emitting diode, light-emitting diode) LED that is limited in illumination application has fixing forward voltage drop, and electric current also has the upper limit, and operating current is the principal element that affects the LED life-span.LED light source can not can directly use utility grid voltage as general light source, for example the forward voltage drop on white light LEDs is generally 3-4V, so it must be furnished with specialized voltages conversion equipment, rated voltage and the electric current that can meet driving LED are provided, just can make LED normally work, namely so-called LED driver.But because performance and the conversion efficiency of the LED driver of various different sizes are different, so select suitable, efficient LED driver, could really show the dynamical characteristic of LED light source.
Utility model content
The object of the utility model embodiment is to provide a kind of LED lamp driver, and the LED lamp driver in this technical scheme, can realize constant current source power supply, and circuit is simple, and power consumption is few, and volume is little, economical and practical.
A kind of LED lamp driver that the utility model embodiment provides, comprises decompression capacitor, rectifier bridge, filter capacitor, current-limiting resistance, wherein,
The DC output end positive pole of described rectifier bridge respectively with the anodal electrical links of one end of described current-limiting resistance, described filter capacitor, the other end of described current-limiting resistance is electrically connected with the positive pole of described LED lamp,
The DC output end negative pole of described rectifier bridge is connected with the negative pole of described filter capacitor, the negative electricity of LED lamp respectively,
One of them ac input end of described rectifier bridge is connected with described decompression capacitor electricity.
Alternatively, a described decompression capacitor resistance in parallel.
Alternatively, a described resistance of decompression capacitor series connection.
Therefore, application the present embodiment technical scheme, because electric main is after decompression capacitor step-down in LED lamp driver, after rectifier bridge rectification, filter capacitor filtering, resistance current limliting, constant-current supply is provided to LED lamp, and circuit structure is simple again, electronic component is few, so the power consumption of driver is little, volume is little, economical and practical.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of LED lamp drive circuitry figure that Fig. 1 provides for the utility model;
The another kind of LED lamp drive circuitry figure that Fig. 2 provides for the utility model:
The third LED lamp drive circuitry figure that Fig. 3 provides for the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
embodiment:
The present embodiment provides a kind of LED lamp driver, and as shown in Figure 1, LED driver comprises decompression capacitor C1, rectifier bridge D, filter capacitor C2, current-limiting resistance R3, wherein,
The DC output end positive pole 2 of described rectifier bridge D links with one end of described current-limiting resistance R3, the positive pole of described filter capacitor C2 respectively, and the other end of described current-limiting resistance R3 is connected with the positive pole of described LED lamp,
The DC output end negative pole 4 of described rectifier bridge D is connected with the negative pole of described filter capacitor C2, the negative pole of LED lamp respectively,
The ac input end 1 of described rectifier bridge D is connected with described decompression capacitor C1.
Can be, but not limited to, a described decompression capacitor C1 resistance R 2 in parallel, as shown in Figure 1.
Can be, but not limited to, the described decompression capacitor C1 resistance R 1 of connecting again, as shown in Figure 1.
R1 is shielding resistance, R2 is that the electric discharge of unloading of capacitor C 1 hinders, the electric current increase of the R3 LED that is current-limiting resistance when preventing that voltage from raising and temperature raises, C2 is filter capacitor, reality can be without filter circuit in LED circuit, C2 is the infringement to LED of impulse current when preventing from turning on light, the moment of turning on light is because the existence of C1 has a very large charging current, this electric current flows through LED will produce damage to LED, there is the intervention of C2, charging impulse current while turning on light draws by C2 completely, played the effect of protecting against shock, shielding.
Therefore this driver can provide constant-current source for LED lamp, and this driver is the driver that low-power LED lamp is the most practical, takies volume I to be contained in easily in the Lamp cup of the less LED lamp in space, now by the general receiving of Lamp cup product.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, be equal to and replace and improvement etc., within all should being included in the protection range of this technical scheme.
Claims (3)
1. a LED lamp driver, is characterized in that, described LED lamp driver comprises decompression capacitor, rectifier bridge, filter capacitor, current-limiting resistance, wherein,
The DC output end positive pole of described rectifier bridge respectively with the anodal electrical links of one end of described current-limiting resistance, described filter capacitor, the other end of described current-limiting resistance is electrically connected with the positive pole of described LED lamp,
The DC output end negative pole of described rectifier bridge is connected with the negative pole of described filter capacitor, the negative electricity of LED lamp respectively,
One of them ac input end of described rectifier bridge is connected with described decompression capacitor.
2. LED lamp driver as claimed in claim 1, is characterized in that, a described decompression capacitor resistance in parallel.
3. LED lamp driver as claimed in claim 1, is characterized in that, a resistance of described decompression capacitor series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866050.9U CN203813996U (en) | 2013-12-25 | 2013-12-25 | LED lamp driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866050.9U CN203813996U (en) | 2013-12-25 | 2013-12-25 | LED lamp driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813996U true CN203813996U (en) | 2014-09-03 |
Family
ID=51452684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320866050.9U Expired - Fee Related CN203813996U (en) | 2013-12-25 | 2013-12-25 | LED lamp driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203813996U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104822193A (en) * | 2015-04-30 | 2015-08-05 | 成都锐奕信息技术有限公司 | Anti-surge LED drive circuit based on voltage-stabilizing diode |
-
2013
- 2013-12-25 CN CN201320866050.9U patent/CN203813996U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104822193A (en) * | 2015-04-30 | 2015-08-05 | 成都锐奕信息技术有限公司 | Anti-surge LED drive circuit based on voltage-stabilizing diode |
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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: 20140903 Termination date: 20141225 |
|
| EXPY | Termination of patent right or utility model |