CN102612210A - Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions - Google Patents
Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions Download PDFInfo
- Publication number
- CN102612210A CN102612210A CN2012100249706A CN201210024970A CN102612210A CN 102612210 A CN102612210 A CN 102612210A CN 2012100249706 A CN2012100249706 A CN 2012100249706A CN 201210024970 A CN201210024970 A CN 201210024970A CN 102612210 A CN102612210 A CN 102612210A
- Authority
- CN
- China
- Prior art keywords
- constant
- led
- voltage
- lamp pearl
- transistor
- 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.)
- Pending
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention aims at providing the LED (light emitting diode) illuminating technology which is different from technologies adopting a switch power supply and a large-capacity electrolytic capacitor. The invention discloses a novel LED illuminating component with constant-current, constant-voltage and multiple protection functions. The LED illuminating component mainly comprises MXL LED lamp beads, two resistors and function blocks (drawing 1, drawing 2) each of which consists of a transistor and has constant-current, constant-voltage and protection functions; N function blocks are connected in series; alternative current grids of 220V, 120V and 100V can be connected in a mode of a bulb directly through a rectifier power supply. The LED illuminating lamp manufactured by the LED illuminating technology is safe and reliable, is high in illumination quality and applicable for illumination in living rooms; the LED illuminating lamp has less elements and extremely low additional price and almost takes the place of the switch power supply and the large-capacity electrolytic capacitor used in the traditional LED illumination with zero cost; the advantage of super-long service life of the LED lamp bead is supported; and the problem that the large-capacity electrolytic capacitor in the switch power supply has a short service life is solved.
Description
Technical field
What the present invention relates to is to implement constant current, constant voltage power supply and new device and its composition and the connecting circuit of kinds of protect are provided LED illuminating lamp pearl.System, method invention of the present invention according to said method can be made various LED illuminating devices.New LED illuminating device and technology with the present invention's original creation; The LED bulb of producing can be applied on 220V, 120V and the 100V AC network reliably, safety and economy, the room is directly provided the comfortable lighting source of true health of high-quality, no stroboscopic, no ultraviolet radiation, no electromagenetic wave radiation, low thermal radiation.The device of the present invention's original creation and technology; Only need several resistance and low-power transistor, almost replaced Switching Power Supply and relevant auxiliary element with " zero cost ", and ideally realized to LED lamp pearl constant current, constant voltage and kinds of protect, greatly reduced the illumination cost of LED lamp.
Background technology
What realize the constant current of LED lamp pearl, constant voltage and kinds of protect in the current technology is Switching Power Supply, big capacity electrolysis filter capacitor and PWM pulse-width modulator.It can the line voltage of AC100V-260V be changed into required low-voltage, and can be to the constant current of LED lamp pearl, constant voltage and protection.Shortcoming is that element is numerous, volume is bigger; In most cases can not be placed in and can directly go up in the bulb of electrical network, more serious is, in the Switching Power Supply supply power mode; Big capacity electrochemical capacitor can not slit scarce, but the life-span of the life-span of electrochemical capacitor and LED lamp pearl is not complementary fully.Short-life electrochemical capacitor has been offset the advantage of LED lamp pearl extra long life.In addition, the cost of Switching Power Supply is higher, has directly promoted the LED illumination cost.The switching frequency of Switching Power Supply has the 100KHz long-wave radiation more than 100KHz, insalubrity is unfavorable for the room illumination.Switching Power Supply is the main flow of current techniques.After the non-mainstream decompression of electric capacity in addition, the rectification LED lamp pearl is supplied power.They do not have defencive function, can not realize constant current, constant voltage power supply, and LED lamp pearl luminous mass is poor, the life-span short.Though it is very simple,, dangerous, unreliable, genus primitive technology lacks of prospects.
Summary of the invention
The LED illuminating device of novel constant current, constant voltage and the kinds of protect function of the present invention's original creation is made up of the series connection of N piece function identical functions piece.Each functional block all has constant current, constant voltage and kinds of protect function, and therefore, the core parts of LED illuminating device are each functional block.Because N piece functional block is identical, below only need the originality of a functional block is described.The illumination of imagination whole LED adds up to NXMXL grain lamp pearl, and so, a functional block will have MXL grain lamp pearl.At first M grain LED lamp pearl is correctly connected by positive-negative polarity, obtaining an end is that the positive other end is negative M grain lamp pearl string.Functional block has L bar lamp pearl string, and it is in parallel that L bar M grain lamp pearl string press identical polar, and obtaining an end and be the positive other end is the lamp pearl piece of MXL for negative, total number of lamp pearl.The functional block with constant current, constant voltage and protection of the present invention's original creation is made up of two resistance, MXL grain lamp pearl piece and a transistor.Transistor can be the NPN type, also can be positive-negative-positive, can be low power tube, also can be middle power and high power valve.Substitute middle power and high power transistor with many low power tube parallel connections among the present invention.Main cause is that to have the price of many parallelly connected low power tubes of same performance cheaply more a lot of than Dan Zhizhong power tube or high power valve, and extra radiator need not be installed.
Are two resistance, a transistor constant current, constant voltage and the kinds of protect that how to realize MXL grain lamp pearl piece? Originality of the present invention is to link the circuit of said elements.Because, have only circuit by the above-mentioned parts of connection of the present invention's proposition, could realize constant current, constant voltage and kinds of protect to LED lamp pearl piece.Connecting circuit is following, because LED MXL lamp pearl piece has positive and negative polarity, transistor also has positive and negative polarity.NPN type collector electrode c is a negative pole for anodal, emitter e; Positive-negative-positive collector electrode c is that negative pole, emitter e are for anodal.Therefore, the connecting circuit of said elements is respectively: the positive terminal of (one) NPN transistor MXL lamp pearl piece is connected with collector electrode c, negative pole end is connected with base stage b; Resistance R
CAn end be connected with collector electrode, the other end is the positive pole of functional block; Resistance R
bOne end is connected the other end and connects emitter e with base stage b, emitter e is the negative pole end (accompanying drawing 1) of functional block.(2) negative pole end of PNP transistor MXL lamp pearl piece is connected with PNP transistor collector c, and positive terminal is connected resistance R with base stage b
cOne end links to each other with collector electrode c, and the other end is the negative pole end of functional block, resistance R
bOne end is connected the other end with base stage b and is connected with emitter e, and emitter e is the positive terminal (accompanying drawing 2) of functional block.
Two resistance R are arranged in functional block
bWith R
cBase resistance R
bOne of end connect and two ends parallelly connected with base stage b respectively (accompanying drawing 1, accompanying drawing 2) with reflection and e with LED lamp pearl piece.Its function provides the collector current under the static long-term safety operating state of transistor.For low power tube be generally zero point several to 1mA, middle power tube then about several milliamperes, R
bOn voltage drop very little, be arranged on usually near facing Jie's cut-off state; Collector resistance R
cFunction be that regulation and control MXL lamp pearl piece voltage guarantees that MXL lamp pearl piece voltage is constant.Transistor is the core parts of constant current, constant voltage and defencive function.As everyone knows, transistor is the electric current amplifier element, and when the variable quantity of base current is Δ I, then the electrorheological at collector electrode turns to β Δ I, and wherein β is the coefficient that electric current amplifies.
Is the functional block of the present invention's original creation constant current, constant voltage and the defencive function of how realizing MXL lamp pearl piece? At first analyze constant current, constant voltage function; With the NPN transistor is example, is the direct voltage that has ripple behind bridge rectifier and little capacitor filtering with reference to accompanying drawing 1. supposition input power supplys.At first, the quiescent voltage that functional block is set just in time is a direct voltage, because the voltage at the action function piece two ends of ripple is when being higher than direct voltage, the electric current that flows into LED lamp pearl piece increases, through base resistance R
bThe electric current increase that dividing potential drop is injected transistor base a bit because the transistor amplification, transistor collector current heightens, and makes total current be diverted to transistor, thereby the electric current that flows into LED lamp pearl piece is restored.Simultaneously because of total current increase, collector resistance R
cVoltage drop increase, the voltage at LED lamp pearl piece two ends is restored.When the voltage at functional block two ends was lower than direct voltage, the situation of generation was opposite, played constant current and constant voltage effect equally.In other words, when the voltage of input changed because of ripple, because transistorized amplification, the transistorized electric current of flowing through changed collector resistance R
cVoltage drop also change thereupon, but the voltage at MXL grain LED lamp pearl piece two ends is constant, the electric current that flows through lamp pearl piece is constant.Because what this functional block was used is high frequency transistor, the reaction speed that ripple voltage is changed is exceedingly fast the filter effect of the big capacity electrochemical capacitor that its quality is superior to using in the Switching Power Supply.So the luminous mass of the LED illumination of the present invention's original creation is very high.
About the functional block of the present invention original creation defencive function to MXL lamp pearl.Generally speaking, destructive source has two types: one for transient behavior, another is long timeliness.At first the analytic function piece is to the protection of transient behavior destruction.Transient behavior destruction source has following several kinds: thunder and lightning, electrical network surge, switching pulse and digit pulse etc. is characterized in that the duration is below millisecond.The present invention is determined by transistorized function the protection that transient behavior destroys.With transistor 2N5551 is example, and static state is provided with operating voltage 50V, and quiescent current is less than 1mA, but the transient state electrical characteristics of 2N5551 are: frequency 100MHz, transient voltage 180V, transient current 600mA.In other words, 2N5551 has the shunting function more than about hundred times.So, even the transient behavior high-voltage pulse that thunder and lightning produces also can be apace by 2N5551 shunting and resistance R
cAbsorption and protection LED lamp pearl piece are without prejudice.This functional block has defencive function to the destruction source of long timeliness equally.As far as the LED illumination, the destruction source of long timeliness has two types: electrical network is the change in voltage at night to the greatest extent; The variations in temperature in daytime, night, season.They all can cause moving of LED electrical characteristics, if design improperly, will produce destruction.At first suppose in minimum daytime of line voltage and ambient temperature minimum winter; Correspondingly be arranged on the operating voltage of LED the low side of trouble free service voltage this moment; LED trouble free service voltage range is 2.9V-3.4V, and it also is near the minimum current of ending that transistorized working point is set simultaneously.When having arrived the highest summer of ambient temperature and voltage the highest night; Because the LED temperature raises; Changed working point and the transistorized working point of LED, this new balance point increases operating voltage by LED and transistor increases the contribution of by-pass current two aspects and reaches balance.Owing to selecting the transistor AND gate resistance R
cAnd R
bThe time, forethought above-mentioned factor.Therefore, the new operating voltage one of LED fixes on below the safe 3.4V, and transistorized quiescent current is also in range of safety operation.So this long timeliness ground voltage raises and the temperature rising can not produce destruction to the LED illumination, just increase new requirement to being provided with of selection of components and static point.
In sum, the functional block of the present invention's original creation is utilized transistorized electric current amplification, so that very simple elements and circuit (accompanying drawing 1, accompanying drawing 2) have realized that constant current, constant voltage power supply to LED lamp pearl piece reach the protection of transient voltage with long timeliness change in voltage.Therefore, the LED illuminating device by the series connection of N piece above-mentioned functions piece is to have constant current, constant voltage and kinds of protect function LED lighting source equally.
There are three big electrical networks the world today: Chinese, European 220V/50HZ; U.S. 120V/60HZ; Japan 100V/60HZ.Key element to different electrical network design LED illumination is: the first, confirm the relevant direct voltage of electrical network behind bridge rectifier and capacitor filtering; The second, confirm the sum of LED lamp pearl; Three, correctly select transistor static security operating voltage, static security work maximum current, transient state maximum current and maximum heat-resisting power; Four, the resistance and the heat-resisting power of selected resistance; Five, confirm M and the concrete number of L in the MXL lamp pearl piece; The number of M is determined by transistor trouble free service voltage; The number of L is by operating current (20mA, 100mA, 350mA) the common decision of transistor trouble free service electric current and single LED lamp pearl; To the LED lamp pearl greater than 20mA, the number of L is generally 1; Six, confirm the times N of functional block series connection, determine jointly by simple function piece trouble free service voltage and filtered direct voltage.
Below provide two routine modular designs:
Example one, 220V electrical network through 4 fast recovery diode Fr107 (700V, 1A) the direct voltage scope behind the bridge rectifier is about 215V-310V, its concrete magnitude of voltage is by the capacitance decision of filter capacitor.Select the capacitor filtering of withstand voltage 400V 0.22 microfarad to 4.7 microfarad for use, direct voltage is reserved the voltage drop of 10V-20V left and right sides resistance between 240V-280V, calculate with single LED lamp pearl 3.0V, and when L=1, the sum of LED lamp pearl is between 75～90.When the capacitance of selected filter capacitor is 0.22 microfarad, the about 240V of direct voltage, diameter 5mm LED lamp pearl rated current 20mA, maximum power is 0.065W, the 4-5 lumen.75 of selected LED lamp pearl sums, the gross power of whole LED illumination is about 5W, and highlight flux is 375 lumens; Low-power transistor is selected NPN type 2N5551 (180V for use; 0.6A, 0.3W), be rational about single 2N5551 long-term safety operating voltage 50V; Therefore, the whole LED illumination is by 5 (N=5) functional block series connection.(L=1 M=15) has the LED lamp pearl of 15 series connection, collector resistance R in each functional block
cAbout 100 Europe 1/4W, base resistance R
bAbout 10 Europe 1/4W.
Example two. 300 on diameter 5mm LED lamp pearl, the about 20W of maximum power, 1500 lumens.Simple grain LED lamp pearl rated current 20mA.Rectification and filtering and precedent are same, direct voltage 240V.(0.6W), the direct voltage of each functional block is about 15V, so functional block number N=15, M=5 and L=4 for 30V, 1A to select small-power NPN transistor S8050 for use.Each functional block lamp pearl is counted MXL=20, and the rated current of lamp pearl piece is about 80mA, collector resistance R
cBe about 25 Europe 1/2W, base resistance R
bPower transistor during about 3 Europe 1/4W, transistor are substituted by 2 S8050 parallel connections.
Description of drawings
Accompanying drawing 1, R
cBe collector resistance, R
bBe base resistance, NPN transistor (ambipolar, Darlington type) is small-power or middle power and high power valve; Use among the present invention the parallel connection of many low power tubes substitute in power and high power valve, M be the parallelly connected number of M grain lamp pearl as a connect number, L of lamp pearl;
Accompanying drawing 2, R
cBe collector resistance, R
bBe base resistance, PNP transistor (ambipolar, Darlington type) small-power or middle power and high power valve, and the parallel connection of available many low power tubes substitute in, high power valve, M is a lamp pearl series connection grain number, L is a M grain lamp pearl parallel connection number.
Embodiment
Scheme one, 220V 5W and 20W LED illuminating lamp
Get one on LED lamp pearl dish, above 300 5mm (20mA, 0.065W) LED lamp pearls evenly are installed.Lamp pearl dish is divided into four districts, 75 the lamp pearls in every district.N=5 is set, and 75 lamp pearls are divided into five parts and adhere to 5 functional blocks separately.Each functional block have 15 pearls (L=1, M=15) be connected into one rectify the utmost point, other end negative pole lamp pearl string.Transistor 2N5551,100 Europe 1/4W R
cResistance, 10 Europe 1/4W R
bResistance is pressed accompanying drawing 1 circuit diagram and is connected.4 Fr107 bridge rectifiers of DC power supply, 0.22 microfarad 275V capacitor filtering.With above-mentioned 5 functional blocks series connection, connect with the mains, obtain about 5W, the LED illumination of 375 lumens.225 lamp pearls in other three districts, 75 in every district implements according to above-mentioned way, and common source adds auxiliary lamp, processes the about 20W that directly goes up the 220V AC network, the LED illuminating lamp of 1500 lumens.
Scheme two, 220V 15W LED illuminating lamp
Get 225 5mm LED lamp pearl dishes, it is divided into 15 functional blocks of N=15.(M=5 L=3) has 15 LED lamp pearls to each functional block.Collector resistance R
c=28 Europe 1/2W, base resistance R
b=4 Europe 1/4W, 1 S8050 transistor, 4 Fr107 bridge rectifiers, 3 0.56 microfarad 100V capacitances in series filtering with above-mentioned 15 functions series connection, add auxiliary lamp, obtain about 15W, 1125 lumen LED illuminating lamps.
With 75 three cores (18x3) LED lamp pearl dish, substitute 15 straw hat heads with 5 three cores (18x3), other elements are constant, can obtain directly to go up the 15W of 220V electrical network equally, the LED illuminating lamp of 1125 lumens.
Claims (1)
1. New LED illuminating device the present invention original creation, that have constant current, constant voltage and kinds of protect function props up resistance and N and props up transistor and form by ading up to NXLXM grain LED lamp pearl, 2XN, and it is in series by the functional block that the N piece has constant current, constant voltage and kinds of protect function.
Core of the present invention promptly is the above-mentioned functions piece, and each functional block is by MXL grain LED lamp pearl, two resistance R
CWith R
bAnd a transistor is pressed circuit diagram (accompanying drawing 1, accompanying drawing 2) connection;
1. by MXL grain LED lamp pearl, 2 resistance R
CWith R
bAnd the LED illumination functions piece of constant current, constant voltage and the kinds of protect function of a transistor formation;
2. the connecting circuit figure of each element of functional block (accompanying drawing 1, accompanying drawing 2);
Series connection grain number M less than 30, parallelly connected number L less than 6, functional block counts N less than 30;
4. transistor can be by several low-power transistor parallel connections in the functional block, and parallelly connected number is 5 to the maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100249706A CN102612210A (en) | 2012-02-06 | 2012-02-06 | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100249706A CN102612210A (en) | 2012-02-06 | 2012-02-06 | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102612210A true CN102612210A (en) | 2012-07-25 |
Family
ID=46529271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100249706A Pending CN102612210A (en) | 2012-02-06 | 2012-02-06 | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102612210A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627738Y (en) * | 2003-01-23 | 2004-07-21 | 张庆 | Input circuit of solid state relay |
| CN1684280A (en) * | 2005-03-04 | 2005-10-19 | 吕大明 | Integrated AC type LED lamp filament |
| CN101032188A (en) * | 2004-08-04 | 2007-09-05 | 詹姆斯·K·吴 | Led lighting system |
| CN200980189Y (en) * | 2006-12-05 | 2007-11-21 | 鹤山丽得电子实业有限公司 | A frequency modulation and high power LED bulb with constant current and constant voltage |
| CN201555060U (en) * | 2009-08-11 | 2010-08-18 | 汤征宁 | LED strip light with length capable of being combined according to needs |
| CN201821554U (en) * | 2010-09-21 | 2011-05-04 | 李志成 | LED energy-saving lamp drive circuit |
| CN201878375U (en) * | 2010-10-08 | 2011-06-22 | 泉州怡能光电科技有限公司 | LED (light-emitting diode) constant-voltage and constant-current driving circuit |
-
2012
- 2012-02-06 CN CN2012100249706A patent/CN102612210A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627738Y (en) * | 2003-01-23 | 2004-07-21 | 张庆 | Input circuit of solid state relay |
| CN101032188A (en) * | 2004-08-04 | 2007-09-05 | 詹姆斯·K·吴 | Led lighting system |
| CN1684280A (en) * | 2005-03-04 | 2005-10-19 | 吕大明 | Integrated AC type LED lamp filament |
| CN200980189Y (en) * | 2006-12-05 | 2007-11-21 | 鹤山丽得电子实业有限公司 | A frequency modulation and high power LED bulb with constant current and constant voltage |
| CN201555060U (en) * | 2009-08-11 | 2010-08-18 | 汤征宁 | LED strip light with length capable of being combined according to needs |
| CN201821554U (en) * | 2010-09-21 | 2011-05-04 | 李志成 | LED energy-saving lamp drive circuit |
| CN201878375U (en) * | 2010-10-08 | 2011-06-22 | 泉州怡能光电科技有限公司 | LED (light-emitting diode) constant-voltage and constant-current driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101778513B (en) | LED flow equalizing control circuit, LED driver module and navigation aiding light | |
| CN102905435B (en) | Wide-voltage high-power-factor light emitting diode (LED) lamp switching and dimming circuit | |
| CN205648122U (en) | Linear constant current LED drive circuit based on triac dimmer | |
| CN205793482U (en) | A kind of zero-frequency dodges light modulation filament circuit for lamp | |
| CN207926974U (en) | A kind of colour temperature adjusts circui | |
| CN203136243U (en) | Shunting constant-current circuit with overvoltage protection | |
| CN203301820U (en) | Linear high-voltage LED (Light Emitting Diode) drive circuit | |
| CN203761634U (en) | LED TRIAC light-adjusting matcher | |
| CN102612210A (en) | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions | |
| CN203071567U (en) | Linear high voltage LED drive protection circuit | |
| CN101977474A (en) | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance | |
| CN105208750A (en) | LED constant current driving device | |
| CN205232515U (en) | Light -emitting diode (LED) driving circuit | |
| CN203560762U (en) | LED PAR lamp | |
| CN102752895A (en) | Capacitance voltage-reduction LED (light emitting diode) lighting device with constant current, constant voltage and protection functions | |
| CN203104914U (en) | Improved LED (Lighting-Emitting Diode) driving circuit | |
| CN203761636U (en) | Universal alternating-current LED lamp | |
| CN103887769B (en) | Linear low density LED driver protection circuit | |
| CN204014184U (en) | A kind of drive circuit of LED traffic lights | |
| CN202135359U (en) | LED energy-saving lamp control circuit with overvoltage protection function | |
| CN201869414U (en) | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps | |
| CN102958248A (en) | LED (Light Emitting Diode) lighting circuit | |
| CN203399354U (en) | Combined linear constant current source and LED driving circuit | |
| CN202335030U (en) | Constant-current protection circuit with multiple paths of parallel light-emitting diodes (LEDs) | |
| CN205071401U (en) | A LED constant -current drive apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120725 |
|
| RJ01 | Rejection of invention patent application after publication |