CN201499359U - Driver circuit of LED fluorescent lamp tube - Google Patents
Driver circuit of LED fluorescent lamp tube Download PDFInfo
- Publication number
- CN201499359U CN201499359U CN2009203099225U CN200920309922U CN201499359U CN 201499359 U CN201499359 U CN 201499359U CN 2009203099225 U CN2009203099225 U CN 2009203099225U CN 200920309922 U CN200920309922 U CN 200920309922U CN 201499359 U CN201499359 U CN 201499359U
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- constant
- led fluorescent
- current
- voltage
- fluorescent lamp
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a driver circuit of an LED fluorescent lamp tube, which comprises a current input terminal, a rectifier bridge and a field effect transistor, wherein the current input terminal is connected with the input terminal of the rectifier bridge. The driver circuit is characterized in that the driver circuit further comprises a constant-current driving chip and an oscillation circuit, the output terminal of the rectifier bridge is connected with the power supply terminal of the constant-current driving chip through a voltage-stabilizing tube, the source electrode of the field effect transistor is connected with the detecting terminal of the constant-current driving chip, the grid electrode of the field effect transistor e is connected with the voltage output terminal of the constant-current driving chip, the drain electrode of the field effect transistor is connected with the oscillation circuit, and the LED fluorescent lamp tube is connected in parallel on the oscillation circuit. The driver circuit adopts the constant-current driving chip in combination with the oscillation circuit to keep constant current flow of the input voltage from 85 V to 265 V, so that when used for driving the LED fluorescent lamp tube, the driver circuit maintains the brightness of the LED fluorescent lamp tube all the time. Furthermore, the driver circuit of the LED fluorescent lamp tube is applied to the commercial power in any countries.
Description
Technical field
The utility model relates to led drive circuit, the drive circuit of the employing constant current technology driving LED fluorescent tube that relates in particular to.
Background technology
Semiconductor lighting (LED) technical development at present is quite swift and violent, replacing the fluorescent lighting status step by step, and why development trend like this is arranged, be because it has following technical advantage: 1, fail safe is good, semiconductor light-emitting-diode is organic resin and semi-conducting material, the solid state device of metal material encapsulation, firm in structure, can not produce loosening during normal the use, broken situation, and the cold light source of this luminous element, drive circuit does not have high voltage yet, therefore, can not cause related accident, himself fail safe and environmentAL safety is all fine to external world because of the inner high voltage of high temperature and broken back; 2, long service life, in several ten thousand hours useful life of light-emitting diode, therefore, the semiconductor lighting technology is than long many of the life-span of any conventional light source in the past; 3, luminous efficiency height, in the power bracket below 3W, the luminous efficiency of various light sources all reduces significantly, and has only the luminous efficiency of light-emitting diode to remain on than higher level, therefore, the light efficiency of micropower when illumination semiconductor etc. will be far above other light source; 4, rich color, light-emitting diode has shades of colour, can satisfy white light various special lighting requirements in addition; 5, drive and regulation and control convenient, light-emitting diode is a current-type driver spare, changes the current value that flows through light-emitting diode and just can change brightness, therefore, drives and regulates and control all very convenient; 6, volume is little, and is in light weight, and semiconductor light-emitting-diode is miniature point-source of light, therefore, can make very little volume, in light weight certainly; 7, aster does not have heavy metal pollution, is beneficial to environmental protection.These advantages have determined light emitting semiconductor device will develop into the novel illumination light source, change the existing Lighting Industry structure and the market structure, change people's living environment.The novel semi-conductor light source needs the special driving circuit to ensure its operate as normal.Therefore, carry out drive circuit and seem extremely important, high-power LED drive circuit on the market generally all is to adopt the constant voltage type of drive at present, and the shortcoming of this mode is the variation along with circuital current, and the luminosity of each LED is inconsistent; Simultaneously often also can make the electrorheological of integrated circuit big, and then cause the damage or the lost of life of whole LED lamp group because of the damage of certain LED in the LED lamp group.In recent years, along with the application of the laser diode of high-power and high-luminance, its manufacturing cost reduced gradually, and its illumination effect, combining to reach the requirement of fluorescent lamp lighting fully, but at present but because there is above-mentioned defective in its drive circuit, has restricted the extensive application of LED light fixture.Look into patent database, obtaining a patent No. is ZL200720181726.5, denomination of invention discloses following content for the utility model patent of " a kind of LED constant-current drive circuit ": a kind of LED constant-current drive circuit, it comprises that the connection civil power reaches a power module of the lamp group of being made up of several light-emitting diodes, it is characterized in that: described power module, comprise ac power input end, rectification circuit, isolation transforming circuit, the constant current output circuit of serial connection successively, the output of described constant current output circuit connects the lamp group.Isolating transformer described here is a mutual inductor.This drive circuit inserts civil power, the general civil power that uses all is 220V, the civil power of 220V passes through constant current output circuit again through behind the isolating transformer, though solved safety problem, but this isolating transformer itself is owing to need power consumption, thereby increased the power consumption of fluorescent lamp group, and have not energy-conservation defective.And during its input voltage step-down, through behind the isolating transformer, output voltage also can step-down, thereby when voltage was undesired, the fluorescent lamp group can become and gradually secretly get brighter.Particularly the line voltage for more external national usefulness is not 220V, is 110V as Japanese line voltage, and this drive current is just no longer suitable.
The utility model content
In view of the deficiency that background technology exists, the technical problems to be solved in the utility model provide a kind of energy-conservation, and can be applicable to different input voltages and still keep the LED fluorescent tube drive circuit of fluorescent lamp group brightness.
For this reason, the utility model adopts following technical scheme to realize: a kind of LED fluorescent tube drive circuit, comprise voltage input end, rectifier bridge, field effect transistor, described voltage input end is connected with the input of described rectifier bridge, it is characterized in that this drive circuit also includes constant-current driven chip, oscillating circuit, the output of described rectifier bridge is connected with the power end of described constant-current driven chip through voltage-stabiliser tube, the source electrode of described field effect transistor connects the test side of constant-current driven chip, grid connects the voltage output end of described constant-current driven chip, drain electrode connects described oscillating circuit, and described LED fluorescent tube is connected in parallel on the described oscillating circuit; Be provided with filter circuit between the output of described rectifier bridge and the constant-current driven chip; Described constant-current driven chip adopts HV9910B or PT4107 chip for driving.
HV9910B that is adopted in the utility model or PT4107 constant-current driven chip, cooperate oscillating circuit, can carry out constant current from 85～265V to the voltage of input, thereby be used for the driving of LED fluorescent tube, can remain the brightness of LED fluorescent tube, so go for any country; The isolation transforming circuit of in circuit, cancelling and the fluorescent lamp group is directly parallel in the oscillating circuit, and no longer need consumed power, higher power supply transformation efficiency, and reach energy-conservation characteristics, the source electrode of field effect transistor is connected with voltage output end with the current detecting end of constant-current driven chip respectively with grid, can keep effectively fluorescent tube brightness and can be not flickering.
Description of drawings
Further describe relevant details of the present utility model below more in conjunction with the accompanying drawings.
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
With reference to accompanying drawing, this LED fluorescent tube drive circuit, comprise the sub-L of voltage input end, H, rectifier bridge, field effect transistor Q1, described voltage input end is connected with the input of described rectifier bridge, between voltage input end and rectifier bridge, be connected a mutual inductor T1, in order to suppress the interference of electromagnetism, this drive circuit also includes constant-current driven chip U1, oscillating circuit, the output of described rectifier bridge is through voltage-stabiliser tube D6, D7 is connected with the power end of described constant-current driven chip U1, the source electrode of described field effect transistor Q1 connects the test side of constant-current driven chip, grid connects the voltage output end of described constant-current driven chip, drain electrode connects described oscillating circuit, and described LED fluorescent tube is connected in parallel on the described oscillating circuit; Be provided with filter circuit between the output of described rectifier bridge and the constant-current driven chip; Described constant-current driven chip adopts HV9910B or PT4107 chip for driving.Adopt the HV9910B chip for driving in the present embodiment.After when the sub-input voltage of voltage input end, passing through mutual inductor T1, flow into rectifier bridge behind over commutation, simultaneously to constant-current driven chip U1 and oscillating circuit voltage in addition, when to oscillating circuit in addition during voltage, induction coil L2 in the oscillating circuit produces the voltage of a direction, and the drain electrode by field effect transistor Q1 in addition the voltage of a forward connect field effect transistor Q1, the source electrode of field effect transistor Q1 is connected with the current detecting end of constant-current driven chip U1, after constant-current driven chip U1 detects the electric current of source electrode, forward voltage of voltage output end output is led to the grid of field effect transistor Q1 and the field effect transistor disconnection is not worked, so cyclical-transformation, a circulation was 600 nanoseconds, thereby how many volts the voltage of no matter importing is, all the cooperation by constant-current driven chip and oscillating circuit makes its input voltage go for any country to keep the LED fluorescent lamp group brightness that is connected in parallel on the oscillating circuit two ends.
Claims (3)
1. LED fluorescent tube drive circuit, comprise current input terminal, rectifier bridge, field effect transistor, described current input terminal is connected with the input of described rectifier bridge, it is characterized in that this drive circuit also includes constant-current driven chip, oscillating circuit, the output of described rectifier bridge is connected with the power end of described constant-current driven chip through voltage-stabiliser tube, described long-acting source electrode that should pipe connects the test side of constant current chip, grid connects the voltage output end of described constant current chip, drain electrode connects described oscillating circuit, and described LED fluorescent tube is connected in parallel on the described oscillating circuit.
2. LED fluorescent tube drive circuit according to claim 1 is characterized in that being provided with filter circuit between the output of described rectifier bridge and the constant current chip.
3. LED fluorescent tube drive circuit according to claim 1 is characterized in that described constant current chip adopts HV9910B or PT4107 chip for driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203099225U CN201499359U (en) | 2009-09-09 | 2009-09-09 | Driver circuit of LED fluorescent lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203099225U CN201499359U (en) | 2009-09-09 | 2009-09-09 | Driver circuit of LED fluorescent lamp tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201499359U true CN201499359U (en) | 2010-06-02 |
Family
ID=42442547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203099225U Expired - Fee Related CN201499359U (en) | 2009-09-09 | 2009-09-09 | Driver circuit of LED fluorescent lamp tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201499359U (en) |
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2009
- 2009-09-09 CN CN2009203099225U patent/CN201499359U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20110909 |