CN202759649U - LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit - Google Patents
LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit Download PDFInfo
- Publication number
- CN202759649U CN202759649U CN201220443540.3U CN201220443540U CN202759649U CN 202759649 U CN202759649 U CN 202759649U CN 201220443540 U CN201220443540 U CN 201220443540U CN 202759649 U CN202759649 U CN 202759649U
- Authority
- CN
- China
- Prior art keywords
- constant
- circuit
- current
- led lamp
- rectifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses an LED lamp tube rectifier and filter circuit and a constant-current LED lamp tube circuit. The rectifier and filter circuit comprises two rectifier bridges, wherein positive output terminals of the two rectifier bridges are connected in parallel, negative output terminals of the two rectifier bridges are connected in parallel, and then a filter capacitor is arranged between the positive output terminals and the negative output terminals; four alternating current terminals of the two rectifier bridges serve as connecting pins of the rectifier and filter circuit. The constant-current LED lamp tube circuit, adopts the LED lamp tube rectifier and filter circuit, wherein the output terminals of the LED lamp tube rectifier and filter circuit are connected with an input terminal of a constant-current control circuit, and an output terminal of the constant-current control circuit is connected with an LED lamp. The LED lamp tube rectifier and filter circuit helps to realize direct replacement of an original fluorescent lamp tube with the LED lamp at a low cost without removing a driving rectifier of the original fluorescent lamp.
Description
Technical field
The utility model relates to LED lamp Driving technique, is specifically related to LED fluorescent tube current rectifying and wave filtering circuit and corresponding constant-current LED fluorescent tube circuit.
Background technology
The LED illumination is a kind of new type light source of rapid rising development in this year, and its many good characteristics are so that its application surface is more and more wider.The unilateal conduction characteristic of LED be it is generally acknowledged the people should use DC driven, but to the device of dc constant voltage and current limliting when guaranteeing reasonable current limiting characteristic, oneself power consumption is very large, so that the efficient of system greatly reduce.Only have the interchange with upper frequency to come driving LED, and be used in inductance or the electric capacity that oneself power consumption is little when presenting larger impedance and come current limliting, could all do the current limiting characteristic of led drive circuit and oneself power consumption more satisfactoryly.
Before the LED illumination occurred, fluorescent lamp was quoted widely with its good energy-efficient performance, such as office building, market etc.Because the drive circuit of existing LED and the drive circuit of fluorescent lamp are not quite similar, if when throwing light on to replace original fluorescent lamp tube with LED, must remove the driving rectifier (namely pull out starter or remove simultaneously the inductance type rectifier) of original fluorescent lamp, troublesome poeration so not only, also can cause the waste of resource, greatly hinder thus normal development and the popularization of LED lamp.
Thus, providing the drive circuit of a kind of LED so that the LED fluorescent tube can directly be replaced existing fluorescent lamp tube, is the problem that this area is needed solution badly.
The utility model content
The utility model is for the existing problem of existing LED lamp Driving technique, and a kind of LED fluorescent tube current rectifying and wave filtering circuit is provided.Utilize this circuit can realize the direct replacement of LED fluorescent tube and fluorescent lamp tube, need not to remove the required rectifier of original fluorescent lamp tube.
For achieving the above object, the utility model adopts following technical scheme:
A kind of LED fluorescent tube current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit comprises two rectifier bridges, and the positive output end of described two rectifier bridges is in parallel, and negative output terminal is in parallel, and between the positive and negative output after connecing a filter capacitor is set; Four AC terminal of described two rectifier bridges are as the link of current rectifying and wave filtering circuit.
Based on above-mentioned LED fluorescent tube current rectifying and wave filtering circuit, the utility model also provides a kind of constant-current LED fluorescent tube circuit, this drive circuit comprises current rectifying and wave filtering circuit and constant-current control circuit, described current rectifying and wave filtering circuit adopts above-mentioned LED fluorescent tube current rectifying and wave filtering circuit, the input of its output and constant-current control circuit is joined, and the output of constant-current control circuit connects the LED lamp.
Further, described constant-current control circuit adopts constant current DC/DC module.
Further, described constant-current control circuit is comprised of constant current control chip, the first resistance, electric capacity, the second resistance and the field effect transistor with a reference source, the first link of described constant current control chip and the second link join with grid and the source electrode of field effect transistor respectively, and described electric capacity is connected between the two; The first link of described constant current control chip is connected to the positive pole of LED lamp string by the first resistance, and the 3rd link of constant current control chip is connected to the source electrode of field effect transistor by the second resistance; The drain electrode of field effect transistor is connected to the negative pole of LED lamp string.
Further, also comprise overcurrent, overvoltage crowbar in the described constant-current control circuit.
The directly original fluorescent lamp tube of replacement of LED fluorescent tube can be realized according to the utility model obtained above, the driving rectifier (namely need to pull out starter or remove simultaneously the inductance type rectifier) of original fluorescent lamp need not be removed.
Moreover, the LED fluorescent tube current rectifying and wave filtering circuit back that the utility model provides can connect the constant current constant voltage DC/DC modular circuit of Switching Power Supply, when replacing original fluorescent lamp tube, can pull out original electron rectifier and also can work, can greatly promote thus existing fluorescent lamp to transform the propelling paces of LED fluorescent tube; Save simultaneously LED fluorescent tube wiring width, be more convenient for designing the constant current flow equalizing circuit of LED fluorescent tube.
Certainly, such as fruit instant short circuited inductance formula rectifier or remove the electron rectifier of original fluorescent tube, can also reduce the power consumption of rectifier.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the constant-current drive circuit schematic diagram in the utility model;
Fig. 2 is the circuit theory diagrams that constant-current LED fluorescent tube circuit is implemented;
Fig. 3 is the circuit theory diagrams with constant-current LED fluorescent tube circuit of protective circuit.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, the LED fluorescent tube current rectifying and wave filtering circuit 100 that the utility model provides mainly comprises two rectifier bridge BD1, BD2 and a filter capacitor C1.
Wherein positive output end 2 parallel connections of two rectifier bridge BD1, BD2, negative output terminal 4 parallel connections, and between the positive and negative output after connecing and meet filter capacitor C1; Four AC terminal 1,3 links as LED fluorescent tube current rectifying and wave filtering circuit 100 of two rectifier bridge BD1, BD2 are used for connecting outside four pin A, B, C, the D end that links to each other with lamp bracket of LED fluorescent tube simultaneously.
The LED fluorescent tube that utilizes above-mentioned current rectifying and wave filtering circuit to form can be realized replacing completely with existing fluorescent tube, need not to remove the rectifier on the original lamp bracket.
As shown in Figure 1, above-mentioned LED fluorescent tube current rectifying and wave filtering circuit 100 positive and negative outputs can join with constant current DC/DC module 200, form corresponding constant-current LED fluorescent tube circuit, drive corresponding LED lamp group 300 with this.
If the appropriate design of constant current DC/DC module 200 usefulness Switching Power Supplies forms, form thus drive circuit and can realize that fully the LED fluorescent tube directly replaces inductance and add the fluorescent tube that starter drives, can also realize that the LED fluorescent tube directly replaces the fluorescent tube that electron rectifier drives simultaneously.
This drive circuit is particularly suitable for the LED strip light.
Referring to Fig. 2, it is depicted as and utilizes above-mentioned double rectifier bridge circuit to realize the direct circuit theory diagrams of replacing the LED fluorescent tube constant-current drive circuit of fluorescent tube in the former fluorescent lamp that is driven by inductor rectifier and starter of LED fluorescent tube.As known in the figure, two rectifier bridge BD1, BD2 adopt above-mentioned syndeton, are not given unnecessary details herein.But the first AC terminal 1 of rectifier bridge BD1 connects the inductor rectifier L in the former fluorescent lamp, is connected in series the starter S in the former fluorescent lamp between the 3rd AC terminal 3 of rectifier bridge BD1 and the first AC terminal 1 of rectifier bridge BD2.
The constant current control section of this circuit is comprised of constant current control chip IC1, the first resistance R 1, capacitor C 1, the second resistance R 2 and the field effect transistor Q1 with a reference source.
Wherein the first link of constant current control chip IC1 and the second link join with grid and the source electrode of field effect transistor Q1 respectively, and capacitor C 1 is connected between the two; The first link of constant current control chip IC1 is connected to the positive pole of LED lamp string by the first resistance, and the positive pole of LED lamp string is connected to the positive output end 2 of two rectifier bridge BD1, BD2 parallel connection simultaneously; The 3rd link of constant current control chip IC1 is connected to the negative output terminal 4 of two rectifier bridge BD1, BD2 parallel connection, and is connected to the source electrode of field effect transistor Q1 by the second resistance R 2; The drain electrode of field effect transistor Q1 is connected to the negative pole of LED lamp string.
Can directly replace by the fluorescent tube in the former fluorescent lamp of inductor rectifier and starter driving with the LED fluorescent tube by foregoing circuit, need not the structure of former fluorescent lamp is done any change, the cost of replacement is extremely low.
Referring to Fig. 3; it is depicted as increases an overcurrent and overvoltage crowbar in the circuit of Fig. 2; remaining circuit part is identical; do not given unnecessary details herein; thus so that LED fluorescent tube Drive and Control Circuit shown in Figure 2 becomes a complete LED fluorescent tube Drive and Control Circuit; can be directly and the design of LED lamp pearl on pcb board, very convenient.
As figure shows, this overcurrent and overvoltage crowbar are comprised of the second constant current control chip IC2 with a reference source, the 3rd resistance R 3, the 4th resistance R 4, the second capacitor C 2.Wherein the first link of the first link of control chip IC2 and control chip IC1 joins, its second connection is connected to respectively the negative output terminal 4 of two rectifier bridge BD1, BD2 parallel connection by the 4th resistance R 4, the second capacitor C 2, and is connected to the negative pole of LED lamp string by the 3rd resistance R 3; The 3rd link of control chip IC2 is connected to the negative output terminal 4 of two rectifier bridge BD1, BD2 parallel connection.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. LED fluorescent tube current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit comprises two rectifier bridges, it is characterized in that, and the positive output end of described two rectifier bridges is in parallel, and negative output terminal is in parallel, and between the positive and negative output after connecing a filter capacitor is set; Four AC terminal of described two rectifier bridges are as the link of current rectifying and wave filtering circuit.
2. constant-current LED fluorescent tube circuit, this drive circuit comprises current rectifying and wave filtering circuit and constant-current control circuit, it is characterized in that, described current rectifying and wave filtering circuit adopts LED fluorescent tube current rectifying and wave filtering circuit claimed in claim 1, the input of its output and constant-current control circuit is joined, and the output of constant-current control circuit connects the LED lamp.
3. a kind of constant-current LED fluorescent tube circuit according to claim 2 is characterized in that, described constant-current control circuit adopts constant current DC/DC module.
4. a kind of constant-current LED fluorescent tube circuit according to claim 2, it is characterized in that, described constant-current control circuit is comprised of constant current control chip, the first resistance, electric capacity, the second resistance and the field effect transistor with a reference source, the first link of described constant current control chip and the second link join with grid and the source electrode of field effect transistor respectively, and described electric capacity is connected between the two; The first link of described constant current control chip is connected to the positive pole of LED lamp string by the first resistance, and the 3rd link of constant current control chip is connected to the source electrode of field effect transistor by the second resistance; The drain electrode of field effect transistor is connected to the negative pole of LED lamp string.
5. a kind of constant-current LED fluorescent tube circuit according to claim 4 is characterized in that, also comprises overcurrent, overvoltage crowbar in the described constant-current control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443540.3U CN202759649U (en) | 2012-08-31 | 2012-08-31 | LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443540.3U CN202759649U (en) | 2012-08-31 | 2012-08-31 | LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202759649U true CN202759649U (en) | 2013-02-27 |
Family
ID=47738805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220443540.3U Expired - Lifetime CN202759649U (en) | 2012-08-31 | 2012-08-31 | LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202759649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199089A (en) * | 2013-03-29 | 2013-07-10 | 深圳市明微电子股份有限公司 | Rectifier and semiconductor integrated circuit |
| CN106413203A (en) * | 2016-11-26 | 2017-02-15 | 方彬辉 | Special-purpose rectification module for electronic rectifier |
-
2012
- 2012-08-31 CN CN201220443540.3U patent/CN202759649U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199089A (en) * | 2013-03-29 | 2013-07-10 | 深圳市明微电子股份有限公司 | Rectifier and semiconductor integrated circuit |
| CN103199089B (en) * | 2013-03-29 | 2015-12-02 | 深圳市明微电子股份有限公司 | Semiconductor integrated circuit |
| CN106413203A (en) * | 2016-11-26 | 2017-02-15 | 方彬辉 | Special-purpose rectification module for electronic rectifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103889111B (en) | The linear constant current drive circuit of a kind of twin voltage operation and driving method thereof | |
| CN102612235B (en) | Light-emitting diode (LED) illuminating device comprising multistage constant current drive circuit | |
| CN201585174U (en) | Led drive circuit | |
| CN102148566B (en) | Boost-type voltage balance converter | |
| CN103813595A (en) | Efficient power source capable of supplying electricity in constant voltage and constant current alternation mode | |
| CN201830521U (en) | Offline type high-power LED (light-emitting diode) constant-current drive power supply | |
| CN103871371A (en) | LED (light-emitting diode) backlight driving circuit, backlight module and liquid crystal display device | |
| CN202759649U (en) | LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit | |
| CN101394135B (en) | Control system and controller power source for electric appliance | |
| CN101873746B (en) | Constant current source driving circuit for medium and high power LED lamps | |
| CN201145716Y (en) | Energy-saving apparatus for making switch power supply | |
| CN102791063A (en) | Intelligent LED module with function of automatic voltage regulation | |
| CN205232515U (en) | Light -emitting diode (LED) driving circuit | |
| CN206413231U (en) | Multiple constant current LED drive power | |
| CN101650008A (en) | Strip lamp | |
| CN206640838U (en) | A kind of non-isolation type tunable optical constant-current LED driver | |
| CN202535294U (en) | High-frequency inverter pulse power supply used in electrodeless lamps | |
| CN202005012U (en) | Multi-path light-emitting diode (LED) current balancing control circuit, LED liquid crystal display screen and television | |
| CN206237643U (en) | A kind of linear constant current controls LED | |
| CN103517521B (en) | A kind of LED high-voltage drives backlight circuit and high drive back light apparatus | |
| CN204377187U (en) | A kind of LED Modular street lamp with single-stage PFC control circuit | |
| CN201246709Y (en) | Bar-shaped light fitting | |
| CN201657413U (en) | Semiconductor LED illuminating lamp driving circuit | |
| CN201995180U (en) | LED high-frequency constant-current driving power supply and LED lamp based on same | |
| CN201667746U (en) | Low harmonic wave LED street lamp drive circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201700 no.485-n, pucang Road, Qingpu District, Shanghai Patentee after: Benfa lighting (Shanghai) Co.,Ltd. Patentee after: Jiang Haijun Address before: 201700 no.485-n, pucang Road, Qingpu District, Shanghai Patentee before: GLOBAL EXPAND (SH) ELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: Jiang Haijun |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
|
| CX01 | Expiry of patent term |