CN203151807U - Resistance-capacitance step-down LED drive circuit - Google Patents
Resistance-capacitance step-down LED drive circuit Download PDFInfo
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- CN203151807U CN203151807U CN 201320029156 CN201320029156U CN203151807U CN 203151807 U CN203151807 U CN 203151807U CN 201320029156 CN201320029156 CN 201320029156 CN 201320029156 U CN201320029156 U CN 201320029156U CN 203151807 U CN203151807 U CN 203151807U
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Abstract
The utility model is a resistance-capacitance step-down LED drive circuit comprising alternating current input ends, a resistance-capacitance step-down circuit unit and an LED circuit unit. The resistance-capacitance step-down LED drive circuit is characterized by further comprising a safety circuit unit, a rectifying circuit unit and a filtering circuit unit, wherein the safety circuit unit is arranged between one alternating current input end and the resistance-capacitance step-down circuit unit, the rectifying circuit unit is connected in series with the resistance-capacitance step-down circuit unit, and the filtering circuit unit is connected in parallel with the LED circuit unit. The resistance-capacitance step-down LED drive circuit is simple in structure, low in cost, small in size, high in reliability and strong in stability and anti-interference ability, enables the working state of an LED to be stable and reliable, and can replace a constant-current switching power supply drive in an LED product and especially in small-power LED lighting so as to effectively reduce cost, improve stability and reliability of the LED product and prolong the comprehensive service life of the whole circuit and the LED product, thus opening up a convenient and feasible technological road for popularization and promotion of LED lighting technology.
Description
Technical field
The utility model relates to light-emitting diode (LED) application circuit circuit, particularly a kind of LED power driving circuit.
Background technology
In current LED illumination application of making rapid progress, regardless of different kinds of the LED of power, its drive circuit generally all adopts the constant current switch power supply, to guarantee can not cause the LED life-span to shorten or damage because electric current changes.Adopt constant current switch power technology comparative maturity, the drive integrated circult (IC) that is used for LED constant current switch power supply on the market is also many.But the circuit structure more complicated of constant current switch power supply, having relatively high expectations of the operational environment of constant current IC, be operated in the high-frequency impulse state, its stability and reliability are all low than last LED element itself, therefore, the advantage of LED is had a greatly reduced quality when adopting the constant current switch power supply, and LED product bug majority causes because of constant current switch power quality reason at present.The constant current switch power volume is big in addition, can't use in some need limit the LED product of driving power volume, and constant current switch power supply cost is higher relatively in addition.
Except adopting the constant current switch power supply, the many colleagues of industry attempt adopting simple LED resistance-capacitance depressurization drive circuit to come driving LED.The resistance-capacitance depressurization circuit can drive the LED series circuit of long string, and the led circuit operating current of long string is little, can effectively improve circuit reliability and stability, reduces circuit power consumption and cost; Simultaneously, the input ac voltage of control resistance-capacitance depressurization drive circuit can effectively be controlled the operating current of LED, so that realize the control of brightness.But resistance-capacitance depressurization drive circuit itself does not possess voltage stabilizing and constant current function, and simple application is easy to cause LED overvoltage, overcurrent in the LED load and causes the LED lost of life even damage; Secondly the resistance-capacitance depressurization circuit also can directly influence the life-span of LED in the spike of being struck by lightning and capacitor charge and discharge produces when connecting, disconnecting the very high switching overvoltage of inductive load or bulk loads regular meeting's generation often or frequent starting.Moreover single led damage open circuit can cause all the other LED phenomenon that do not work in the LED series arm; Also have the power factor of resistance-capacitance depressurization drive circuit lower.Many technical problems that above resistance-capacitance depressurization drive circuit exists directly influence it in popularization and the application of LED applied technical field.
Summary of the invention
The purpose of this utility model provides a kind of good reliability, stability is high, antijamming capability is strong resistance-capacitance depressurization led drive circuit, improving LED product stability and reliability, thereby prolongs the comprehensive useful life of LED product.
Above-mentioned purpose of the present utility model is to be achieved through the following technical solutions: make up a kind of resistance-capacitance depressurization led drive circuit, comprise alternating current input, resistance-capacitance depressurization circuit unit, led circuit unit, the rectification circuit unit that be characterized in also comprising the insurance circuit unit that is arranged between alternating current input and the resistance-capacitance depressurization circuit unit, is connected in series with the resistance-capacitance depressurization circuit unit and and the filter circuit unit in parallel with the led circuit unit.
According to the resistance-capacitance depressurization led drive circuit of an embodiment of the utility model, wherein, described insurance circuit unit is made up of with at least one piezo-resistance at least one insurance resistance or protective tube; Described resistance-capacitance depressurization circuit unit is composed in parallel by at least one electric capacity and at least one resistance; Described rectification circuit unit is made up of bridge rectifier; Described filter capacitor unit is made up of an electric capacity and resistance; The negative pole end of described led circuit unit is connected respectively with publicly with the negative pole of output end of rectification circuit unit.
The beneficial effects of the utility model are: resistance-capacitance depressurization led drive circuit of the present utility model, it is simple in structure, with low cost, volume is little, good reliability, stability and antijamming capability are strong, make the LED stable working state reliable, can especially in small power LED illumination, can replace the constant current switch power drives at the LED product, reach effectively and reduce cost, improve stability and the reliability of LED product, prolong the comprehensive useful life of integrated circuit and LED product, thereby be the road of popularizing and promoting a convenient feasible technology open of LED lighting technology.
Description of drawings
Fig. 1 is the structural representation of resistance-capacitance depressurization led drive circuit of the present utility model.
Fig. 2 is the circuit resistance-capacitance depressurization led drive circuit schematic diagram of an embodiment of the utility model.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.At first need to prove, the utility model is not limited to following embodiment, those skilled in the art should understand the utility model from the spirit that following execution mode embodies, and each technical term can be done the most wide in range understanding based on spiritual essence of the present utility model.Same or analogous member uses the same reference numerals to represent among the figure.
As shown in Figure 1, resistance-capacitance depressurization led drive circuit of the present utility model comprises insurance circuit unit 1, resistance-capacitance depressurization circuit unit 2, rectification circuit unit 3, filter circuit unit 4 and led circuit unit 5.
Below in conjunction with the drawings and specific embodiments principle of the present utility model and design feature are described further.
Fig. 2 is the circuit resistance-capacitance depressurization led drive circuit schematic diagram of an embodiment of the utility model.
As shown in Figure 2, the resistance-capacitance depressurization led drive circuit of an embodiment of the utility model comprises insurance circuit unit 1, resistance-capacitance depressurization circuit unit 2, rectification circuit unit 3 and the led circuit unit 5 of series connection successively and the filter circuit unit 4 in parallel with the led circuit unit.Wherein, described insurance circuit unit at least by one for example insurance resistance or protective tube R1 and at least one for example a piezo-resistance RV form; Described resistance-capacitance depressurization circuit unit 2 by at least one for example capacitor C 1 and at least one for example a resistance R 2 compose in parallel; Described rectification circuit unit 3 is made up of the bridge rectifier 6 of four diode D1-D4; Described filter capacitor unit 4 is made up of a capacitor C 2 and resistance R 3; The negative pole end 5 of described led circuit unit 5 " be connected with the output 4 ' of rectification circuit unit 3.
The annexation of each part mentioned above further specifies as follows:
R1 is insurance resistance or protective tube, and RV is piezo-resistance, and C1 and R2 form the resistance-capacitance depressurization circuit, and D1～D4 forms bridge rectifier, and R3 is the bypass resistance of electrochemical capacitor, and R4 is current-limiting resistance.The incoming end (IN) 6 of alternating current input is connected with described insurance resistance or protective tube R1, described insurance resistance or protective tube R1 are connected with described capacitor C 1, described piezo-resistance RV one termination insures between resistance or protective tube R1 and the capacitor C 1, another termination alternating current input other end 6 ', described resistance R 2 and capacitor C 1 are connected in parallel, the other end of described capacitor C 1 is connected with the input side 1 ' of described rectification circuit D1～D4, the two ends 2 ' of the outlet side of described rectification circuit D1～D4,4 ' is connected with filter capacitor C2, described resistance R 3 is connected in parallel with described filter capacitor C2, the end of described filter capacitor C2 and led drive circuit output interface 5 " be connected; the other end of described filter capacitor C2 connects current-limiting resistance R4, and described current-limiting resistance R4 is connected with led circuit unit 5 output interfaces 5 '.Described rectification circuit D1～D4 is 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 does not have high-frequency agitation source with respect to 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 (capacitor C 1); Preferably, the output of power supply is through series resistance current limliting rear drive led light source.
For the technical solution of the utility model, the selection of all components and parts must guarantee in mains fluctuation 10%, so that led circuit can normal illumination, and in mains fluctuation 20%, the led circuit fault-free.
In sum, insurance resistance or protective tube R1 and the piezo-resistance RV impact that can effectively resist surge voltage of the utility model by insurance circuit unit 1; Quantity by control LED lamp, effectively solve the technical barrier that the spike that capacitor charge and discharge produces when the circuit frequent starting of resistance-capacitance depressurization driving LED electric capacity causes the LED lost of life and damage, the LED series arm is composed in series by the LED series connection or by LED and current-limiting resistance, further can effectively solve the technical barrier that the resistance-capacitance depressurization led drive circuit causes the LED over-voltage and over-current easily by the control circuit unit.
Should be understood that those skilled in the art can make various changes or modifications the utility model after having read above-mentioned instruction content of the present utility model, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (5)
1. resistance-capacitance depressurization led drive circuit, comprise alternating current input, resistance-capacitance depressurization circuit unit, led circuit unit, it is characterized in that the rectification circuit unit that also comprise the insurance circuit unit that is arranged between alternating current input and the resistance-capacitance depressurization circuit unit, is connected in series with the resistance-capacitance depressurization circuit unit and and the filter circuit unit in parallel with the led circuit unit.
2. resistance-capacitance depressurization led drive circuit according to claim 1 is characterized in that, described insurance circuit unit is made up of with at least one piezo-resistance at least one insurance resistance or protective tube; Described resistance-capacitance depressurization circuit unit is composed in parallel by at least one electric capacity and at least one resistance; Described rectification circuit unit is made up of bridge rectifier; Described filter capacitor unit is made up of an electric capacity and resistance; The negative pole end of described led circuit unit is connected respectively with publicly with the negative pole of output end of rectification circuit unit.
3. resistance-capacitance depressurization led drive circuit according to claim 2 is characterized in that, described insurance circuit unit insures resistance or protective tube and a piezo-resistance by one and forms.
4. resistance-capacitance depressurization led drive circuit according to claim 2 is characterized in that, described resistance-capacitance depressurization circuit unit is composed in parallel by an electric capacity and a resistance.
5. resistance-capacitance depressurization led drive circuit according to claim 2 is characterized in that, described bridge rectifier is a bridge rectifier of being made up of four diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029156 CN203151807U (en) | 2013-01-21 | 2013-01-21 | Resistance-capacitance step-down LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029156 CN203151807U (en) | 2013-01-21 | 2013-01-21 | Resistance-capacitance step-down LED drive circuit |
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| Publication Number | Publication Date |
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| CN203151807U true CN203151807U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029156 Expired - Fee Related CN203151807U (en) | 2013-01-21 | 2013-01-21 | Resistance-capacitance step-down LED drive circuit |
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Cited By (3)
| 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 |
| CN105007663A (en) * | 2015-07-30 | 2015-10-28 | 黄克亚 | Step-down LED driver |
| CN106945283A (en) * | 2017-05-19 | 2017-07-14 | 安徽师范大学 | A kind of 3D printer control system |
-
2013
- 2013-01-21 CN CN 201320029156 patent/CN203151807U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN105007663A (en) * | 2015-07-30 | 2015-10-28 | 黄克亚 | Step-down LED driver |
| CN106945283A (en) * | 2017-05-19 | 2017-07-14 | 安徽师范大学 | A kind of 3D printer control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170214 Address after: 201201 Shanghai, Pudong New Area East Road, No. 9, building 1, building 6101 Patentee after: Ayura Terua Limited by Share Ltd Address before: 201201 Shanghai East Road, Pudong New Area, building B, building No. 2, building No. 6101 Patentee before: Shanghai Oppel Lighting Co., Ltd. Patentee before: Shanxi Haoyu Photoelectric Science & Technology Co., Ltd. Patentee before: Shanghai Wellmax Lighting Industry Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20200121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |