CN202019481U - Driving circuit of low-current high-voltage light emitting diode (LED) lamp - Google Patents
Driving circuit of low-current high-voltage light emitting diode (LED) lamp Download PDFInfo
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- CN202019481U CN202019481U CN201120059940XU CN201120059940U CN202019481U CN 202019481 U CN202019481 U CN 202019481U CN 201120059940X U CN201120059940X U CN 201120059940XU CN 201120059940 U CN201120059940 U CN 201120059940U CN 202019481 U CN202019481 U CN 202019481U
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- filter capacitor
- capacitor
- current high
- drive circuit
- resistance
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Abstract
The utility model discloses a driving circuit of a low-current high-voltage light emitting diode (LED) lamp. The driving circuit comprises a first capacitor, a first resistor, a rectifying circuit, a filter capacitor and a second resistor, wherein a mains supply input end is connected with the first capacitor; the first resistor is connected with the first capacitor in parallel; the other end of the first capacitor is connected with the input side of the rectifying circuit; two ends of the output side of the rectifying circuit are connected with the filter capacitor; the second resistor is connected with the filter capacitor in parallel; and two ends of the filter capacitor are connected with two driving circuit output interfaces. The driving circuit of the low-current high-voltage LED lamp has the advantages of simple structure, reduced cost, low energy consumption and increased power conversion efficiency.
Description
Technical field
The utility model relates to a kind of drive circuit of LED lamp.
Background technology
Through connecting and composing in parallel, described led chip directly is installed on the printed substrate luminous component of high-powered LED lamp by many low-power LED chips.
Existing LED lamp is divided into two big classes, wherein a class is big electric current LED, an other class is a little electric current high-voltage LED etc., its drive circuit that adopts generally includes step-down transformer, circuit structure is comparatively complicated, and have the higher-order of oscillation, the technological deficiency of existence: cost is higher, energy consumption is higher, power supply conversion efficiency is low.
Summary of the invention
In order to overcome the deficiency that circuit complexity, cost are higher, energy consumption is higher, power supply conversion efficiency is low of existing LED lamp drive circuit, the utility model provide a kind of circuit simple, reduce cost, energy consumption is lower, improve the drive circuit of the little electric current high-voltage LED lamp of power supply conversion efficiency.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of drive circuit of little electric current high-voltage LED lamp, comprise first electric capacity, first resistance, rectification circuit, filter capacitor and second resistance, the civil power incoming end is connected with described first electric capacity, described first resistance and the first electric capacity parallel connection, the other end of described first electric capacity is connected with the input side of described rectification circuit, the two ends of the outlet side of described rectification circuit are connected with filter capacitor, described second resistance is in parallel with described filter capacitor, and the two ends of described filter capacitor are connected with two drive circuit output interfaces.
Further, an end of described filter capacitor connects current-limiting resistance, and described current-limiting resistance is connected with a drive circuit output interface.
Further again, described rectification circuit is a bridge rectifier.Certainly, also can select for use other rectification circuits commonly used to realize.
The beneficial effects of the utility model mainly show: 1, owing to avoid adopting transformer, simplified the circuit composition, the no higher-order of oscillation, electromagnetic-radiation-free have reduced energy consumption, have improved power supply conversion efficiency simultaneously; 2, adopt current-limiting resistance, when power circuit produces unusual fluctuations, effectively reduce the operating current of LED lamp, play the effect of protection LED.
Description of drawings
Fig. 1 is the schematic diagram of the drive circuit of little electric current high-voltage LED lamp.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1, a kind of drive circuit of little electric current high-voltage LED lamp, comprise first capacitor C 1, first resistance R 1, rectification circuit D1, filter capacitor C2 and second resistance R 2, the civil power incoming end is connected with described first capacitor C 1, described first resistance R 1 and 1 parallel connection of first capacitor C, the other end of described first capacitor C 1 is connected with the input side of described rectification circuit D1, the two ends of the outlet side of described rectification circuit D1 are connected with filter capacitor C2, described second resistance R 2 is in parallel with described filter capacitor C2, and the two ends of described filter capacitor C2 are connected with two drive circuit output interfaces.
The end of described filter capacitor C2 connects current-limiting resistance R3, and described current-limiting resistance R3 is connected with a drive circuit output interface.Described rectification circuit D1 is a bridge rectifier.Certainly, also can select for use other rectification circuits commonly used to realize.
In the present embodiment, with respect to prior art, do not adopt IC chip and transformer, adopt the capacitance-resistance mode to come step-down, obtain DC power supply by rectifying and wave-filtering again after the step-down, this DC power supply provides little electric current high-voltage LED lamp to drive, and existing do not have high-frequency agitation source for available circuit, thereby do not have high frequency radiation, the required voltage and current parameter of led light source work is adjusted by the capacitance numerical value in the circuit (first capacitor C 1); Preferably, the output of power supply is through series resistance current limliting rear drive led light source.
Claims (3)
1. the drive circuit of one kind little electric current high-voltage LED lamp, it is characterized in that: described drive circuit comprises first electric capacity, first resistance, rectification circuit, filter capacitor and second resistance, the civil power incoming end is connected with described first electric capacity, described first resistance and the first electric capacity parallel connection, the other end of described first electric capacity is connected with the input side of described rectification circuit, the two ends of the outlet side of described rectification circuit are connected with filter capacitor, described second resistance is in parallel with described filter capacitor, and the two ends of described filter capacitor are connected with two drive circuit output interfaces.
2. the drive circuit of little electric current high-voltage LED lamp as claimed in claim 1 is characterized in that: an end of described filter capacitor connects current-limiting resistance, and described current-limiting resistance is connected with a drive circuit output interface.
3. the drive circuit of little electric current high-voltage LED lamp as claimed in claim 1 or 2 is characterized in that: described rectification circuit is a bridge rectifier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120059940XU CN202019481U (en) | 2011-03-09 | 2011-03-09 | Driving circuit of low-current high-voltage light emitting diode (LED) lamp |
| PCT/CN2011/071949 WO2012116503A1 (en) | 2011-02-28 | 2011-03-18 | Led bulb with high power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120059940XU CN202019481U (en) | 2011-03-09 | 2011-03-09 | Driving circuit of low-current high-voltage light emitting diode (LED) lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202019481U true CN202019481U (en) | 2011-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120059940XU Expired - Fee Related CN202019481U (en) | 2011-02-28 | 2011-03-09 | Driving circuit of low-current high-voltage light emitting diode (LED) lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202019481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822115A (en) * | 2013-12-24 | 2014-05-28 | 宁波宜升光电科技有限公司 | Ultrathin projection lamp |
-
2011
- 2011-03-09 CN CN201120059940XU patent/CN202019481U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822115A (en) * | 2013-12-24 | 2014-05-28 | 宁波宜升光电科技有限公司 | Ultrathin projection lamp |
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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: 20111026 Termination date: 20140309 |