CN203251464U - Electronic ballast of LED tube lamp - Google Patents
Electronic ballast of LED tube lamp Download PDFInfo
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- CN203251464U CN203251464U CN 201320182484 CN201320182484U CN203251464U CN 203251464 U CN203251464 U CN 203251464U CN 201320182484 CN201320182484 CN 201320182484 CN 201320182484 U CN201320182484 U CN 201320182484U CN 203251464 U CN203251464 U CN 203251464U
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Abstract
An electronic ballast of an LED tube lamp comprises a rectifying filter circuit and a flyback transformer circuit. The electronic ballast of the LED tube lamp is characterized in that: the flyback transformer circuit comprises a BP3102 constant-current chip; the flyback transformer circuit further comprises a first-grade winding, a first primary winding which is connected with the first-grade winding, and a second primary winding which is connected with the first-grade winding in series. The first primary winding and the first-grade winding form a flyback circuit. The BP3102 constant-current chip is provided with a MOSFET transistor which is mainly used for controlling the flyback circuit. An integrated chip BP3102 is adopted for the electronic ballast of the LED tube lamp. The electronic ballast of the LED tube lamp has excellent linear regulation rate and load adjustment rate. Not only are low noise and long service life of the lamp obtained, but also the electronic ballast of the LED tube lamp has the following advantages: high power factor, low current peak ratio, shortcircuit protection, over-temperature protection, over-voltage protection, etc. The electronic ballast of the LED tube lamp further has the following advantages: improving flushing phenomenon of the lamp, reducing blackening phenomenon of the lamp tube, and prolonging service life of the lamp tube.
Description
Technical field
The utility model relates to a kind of electric ballast, particularly relates to a kind of electric ballast that is applied to the low-power LED Down lamp.
Background technology
The low-power LED Down lamp is widely used in interior decoration with its distinctive artistic beauty perception.The LED lamp can adopt epoxy encapsulation, and energy bearing high strength mechanical shock and vibrations are difficult for fragmentation, and the advantage that volume is little, quality is light is arranged.On the other hand, its light source free from glare, light are concentrated, vision is soft, are more and more favored by people in room lighting.
But, be its ballast device in the behind key that the LED lamp develops rapidly.The Inductive ballast that now most of LED lamps use on the market, though have simple in structurely, stroboscopic phenomenon often can occur in the characteristics that the life-span is long, simultaneously Inductive ballast have that power factor is low, many shortcomings such as poor-performing, big energy-consuming during low voltage starting.Therefore, the electric ballast of output pressure-stabilizing constant flow is particularly important to the development of LED lamp.
Summary of the invention
Technical problem to be solved in the utility model provides that a kind of current wave crest ratio is low, cost performance is high, power factor is high, high performance electric ballast.
The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of electric ballast of LED Down lamp, comprise current rectifying and wave filtering circuit and flyback transformer circuit, it is characterized in that: described flyback transformer circuit comprises the BP3102 constant current chip, this flyback transformer circuit also comprises one-level winding and the first armature winding and the second armature winding that is serially connected with this one-level winding in parallel respectively, described the first armature winding and one-level winding consist of reverse excitation circuit, have the MOSFET pipe that reverse excitation circuit is controlled in the described BP3102 constant current chip.
Preferably, described current rectifying and wave filtering circuit is bridge rectifier, be connected with the first electric capacity between two outputs of this bridge rectifier, one end of described the first armature winding is connected to one of them output of bridge rectifier, another output head grounding of described bridge rectifier, then the other end of described the first armature winding connect the first resistance and the second resistance are connected to the power end of BP3102 constant current chip.
And preferably, the first end of described the second armature winding is by the 3rd resistance and the 4th grounding through resistance of series connection, and be connected to first the 3rd resistance, and the auxiliary winding sampling end of BP3102 constant current chip is connected between the 3rd resistance and the 4th resistance, the direct ground connection of the second end of this second armature winding, the first end of described the second armature winding is connected to the anode of one the 5th diode, the negative electrode of described the 5th diode is connected to an end of the second electric capacity, the other end ground connection of described the second electric capacity, the power end of BP3102 constant current chip are connected between the 5th diode and the second electric capacity.
Preferably, the current sample end of this BP3102 constant current chip passes through one the 5th grounding through resistance, the direct ground connection of the earth terminal of this BP3102 constant current chip, and two internal power pipes drain electrodes of this BP3102 constant current chip all are connected to the second end of the first armature winding.
One end of described one-level winding is connected to the anode of one the 6th diode, and between the other end of the negative electrode of the 6th diode and one-level winding, be parallel with respectively the 3rd electric capacity and the 6th resistance, the other end of the negative electrode of the 6th diode and described one-level winding is the output of this flyback transformer circuit, is connected to load.
Preferably, described first, second resistance is 1M Ω, and the 4th, the 6th resistance is 75K Ω, and the 5th resistance is 2.7 Ω, and the 3rd resistance is 300K Ω; The first electric capacity is 0.1uF, 400V, and second, third electric capacity is 4.7uF, 400V, and the first to the 6th diode is the diode that model is M7.
Compared with prior art; the electric ballast that the utility model has the advantage of this LED Down lamp adopts integrated chip BP3102; excellent line regulation and load regulation are arranged; not only noise is low, lamp life is high, and has the multiple protection functions such as power factor height, current wave crest ratio are low, short-circuit protection, overheat protector, overvoltage protection.Can improve the scintillation of eliminating lamp, alleviate the fluorescent tube melanism, the life-span of prolonging lamp tube.
Description of drawings
Fig. 1 is the operation principle block diagram of electric ballast of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model electric ballast.
Fig. 3 is output voltage and the output current resolution chart of the utility model electric ballast, Fig. 3 a output voltage resolution chart wherein, and Fig. 3 b is the output current resolution chart.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
The operation principle block diagram of electric ballast of the present utility model comprises current rectifying and wave filtering circuit and flyback transformer circuit as shown in Figure 1.Civil power inputs to current rectifying and wave filtering circuit, then through exporting load to behind the flyback transformer circuit that comprises the BP3102 constant current chip.
As shown in Figure 2, circuit theory diagrams for the utility model electric ballast, this current rectifying and wave filtering circuit comprises the first diode D1, the second diode D2, the bridge rectifier that the 3rd diode D3 and the 4th diode D4 consist of, and first capacitor C 1, the two ends of this first capacitor C 1 are connected on the output of this bridge rectifier.
This flyback transformer circuit also comprises one-level winding M3 and the first armature winding M1, the second armature winding M2 that is serially connected with this one-level winding M3 in parallel respectively.The end of the first armature winding M1 is connected to one of them output of bridge rectifier, another output head grounding of bridge rectifier, the other end of the first armature winding M1 connect the first resistance R 1 and the second resistance R 2, then be connected to the power end VCC of BP3102 constant current chip, the first end of the second armature winding M2 is by the 3rd resistance R 3 and the 4th resistance R 4 ground connection of series connection, and be connected to first the 3rd resistance R 3, and the auxiliary winding sampling end FB of BP3102 constant current chip is connected between the 3rd resistance R 3 and the 4th resistance R 4, the direct ground connection of the second end of this second armature winding M2, and the first end of this second armature winding M2 is connected to the anode of one the 5th diode D5, the negative electrode of the 5th diode D5 is connected to an end of the second capacitor C 2, the other end ground connection of the second capacitor C 2, the power end VCC of BP3102 constant current chip is connected between the 5th diode D5 and the second capacitor C 2.The current sample end CS of this BP3102 constant current chip is by one the 5th resistance R, 5 ground connection, the direct ground connection of earth terminal GND of this BP3102 constant current chip.And two internal power pipe drain D rain of this BP3102 constant current chip all are connected to the second end of the first armature winding M1.
The end of one-level winding M3 is connected to the anode of one the 6th diode D6, and is parallel with respectively the 3rd capacitor C 3 and the 6th resistance R 6 between the other end of the negative electrode of the 6th diode D6 and one-level winding M3.The other end of the negative electrode of the 6th diode D6 and one-level winding M3 is the output of this flyback transformer circuit, is connected to load.
R1=R2=1M Ω wherein, R4=R6=75K Ω, R5=2.7 Ω, R3=300K Ω; C1=0.1uF(400V), C2, C3 are 4.7uF (400V), and D1～D6 is the diode of model M7.
The operation principle of this circuit of electronic ballast is as follows: the acquisition voltage swing is the direct voltage about 200V behind the single-phase civil power process current rectifying and wave filtering circuit rectifying and wave-filtering of 220V, the first armature winding M1 and one-level winding M3 consist of reverse excitation circuit, have the MOSFET pipe to be mainly used to reverse excitation circuit is controlled among the chip BP3102.The working power of chip BP3102 is carried out voltage regulation filtering by the second capacitor C 2 by the second armature winding M2 after through the 5th diode D5 rectification and is obtained, the first resistance R 1 and the second resistance R 2 are the resistance of resistance 1M Ω, be mainly when chip BP3102 has just powered on initial operating voltage is provided, and also have the effect of promising the first armature winding M1 stored energy concurrently.The second armature winding M2 is auxiliary winding, be used for detecting the size of output current, be connected to the auxiliary winding sampling end FB of chip BP3102 by feedback network the 3rd resistance R 3, the 4th resistance R 4, realize the constant current feedback effect, by the duty ratio of access feedback regulation output PWM ripple, so that electric current remains steady state value.The 5th resistance R 5 is little resistance resistance, is used for detecting the peak current of the first armature winding M1, when the voltage on the 5th resistance R 5 during greater than inner comparative voltage, power tube is turn-offed power tube pulse blocking, realizes overcurrent protection.The reverse excitation circuit operation principle: when the conducting of MOSFET pipe, the first armature winding M1 Current rise stored magnetic energy, this moment, the polarity of voltage of one-level winding M3 was lower just upper negative, the 6th diode D6 cut-off.When MOSFET managed cut-off, the magnetic energy that is stored in the coupling winding discharged, and this moment, the polarity of voltage of one-level winding M3 became upper just lower bearing, the 6th diode D6 conducting, and one-level winding M3 gives the 3rd capacitor C 3 chargings.
At input ac voltage 100V～240V, during to its bringing onto load resistance (30 Ω, 25W), carry out the measurement of output current and voltage, data such as following table 1.
Table 1 output voltage is surveyed and output current examination tables of data
According to the test result of output voltage and output current in the upper table, can obtain characteristic curve shown in Fig. 3 (a) and Fig. 3 (b).
According to table 1, when input voltage 100V～240V, can calculate the fluctuation of load:
Fluctuation voltage:
Fluctuating current:
Test result shows that this electric ballast has the characteristics of voltage stabilizing, constant current output.
In sum, the utility model has following beneficial effect:
1, adopt electronic component, not only light small and exquisite, also have the starter function, can save independent starter, and have energy-saving effect.
2, adopt integrated chip BP3102, excellent line regulation and load regulation are arranged, not only noise is low, lamp life is high, and has the multiple protection functions such as power factor height, current wave crest ratio are low, short-circuit protection, overheat protector, overvoltage protection.
3, because voltage stabilizing and constant current, so starting point is reliable, the scintillation that can improve the elimination lamp, alleviate the fluorescent tube melanism, in life-span that can prolonging lamp tube, be particularly suitable for the place of switching frequency height or maintenance difficult.
4, Electro Magnetic Compatibility is good, can not produce lighting environment and pollute, thereby can not cause that power network fluctuation disturbs the normal operation of Other Instruments equipment, computer network etc.
Claims (6)
1. the electric ballast of a LED Down lamp, comprise current rectifying and wave filtering circuit and flyback transformer circuit, it is characterized in that: described flyback transformer circuit comprises the BP3102 constant current chip, this flyback transformer circuit also comprise one-level winding (M3) and respectively parallel connection be serially connected with the first armature winding (M1) and second armature winding (M2) of this one-level winding (M3), described the first armature winding (M1) and one-level winding (M3) consist of reverse excitation circuit, have the MOSFET pipe that reverse excitation circuit is controlled in the described BP3102 constant current chip.
2. the electric ballast of LED Down lamp as claimed in claim 1, it is characterized in that: described current rectifying and wave filtering circuit is bridge rectifier, be connected with the first electric capacity (C1) between two outputs of this bridge rectifier, one end of described the first armature winding (M1) is connected to one of them output of bridge rectifier, another output head grounding of described bridge rectifier, the other end of described the first armature winding (M1) connect the first resistance (R1) and the second resistance (R2) then are connected to the power end (VCC) of BP3102 constant current chip.
3. the electric ballast of LED Down lamp as claimed in claim 2, it is characterized in that: the first end of described the second armature winding (M2) is by the 3rd resistance (R3) and the 4th resistance (R4) ground connection of series connection, and be connected to first the 3rd resistance (R3), and the auxiliary winding sampling end (FB) of BP3102 constant current chip is connected between the 3rd resistance (R3) and the 4th resistance (R4), the direct ground connection of the second end of this second armature winding (M2), the first end of described the second armature winding (M2) is connected to the anode of one the 5th diode (D5), the negative electrode of described the 5th diode (D5) is connected to an end of the second electric capacity (C2), the other end ground connection of described the second electric capacity (C2), the power end of described BP3102 constant current chip (VCC) are connected between the 5th diode (D5) and the second electric capacity (C2).
4. the electric ballast of LED Down lamp as claimed in claim 3, it is characterized in that: the current sample end (CS) of this BP3102 constant current chip is by one the 5th resistance (R5) ground connection, the earth terminal of this BP3102 constant current chip (GND) is ground connection directly, and two internal power pipe drain electrodes (Drain) of this BP3102 constant current chip all are connected to the second end of the first armature winding (M1).
5. the electric ballast of LED Down lamp as claimed in claim 4, it is characterized in that: an end of described one-level winding (M3) is connected to the anode of one the 6th diode (D6), and between the other end of the negative electrode of the 6th diode (D6) and one-level winding (M3), be parallel with respectively the 3rd electric capacity (C3) and the 6th resistance (R6), the other end of the negative electrode of the 6th diode (D6) and described one-level winding (M3) is the output of this flyback transformer circuit, is connected to load.
6. the electric ballast of LED Down lamp as claimed in claim 5, it is characterized in that: described first, second resistance is 1M Ω, and the 4th, the 6th resistance is 75K Ω, and the 5th resistance is 2.7 Ω, and the 3rd resistance is 300K Ω; The first electric capacity is 0.1uF, 400V, and second, third electric capacity is 4.7uF, 400V, and the first to the 6th diode is the diode that model is M7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182484 CN203251464U (en) | 2013-04-11 | 2013-04-11 | Electronic ballast of LED tube lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182484 CN203251464U (en) | 2013-04-11 | 2013-04-11 | Electronic ballast of LED tube lamp |
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| CN203251464U true CN203251464U (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320182484 Expired - Fee Related CN203251464U (en) | 2013-04-11 | 2013-04-11 | Electronic ballast of LED tube lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682743A (en) * | 2015-02-10 | 2015-06-03 | 厦门台和电子有限公司 | Multi-output power adapter circuit |
| CN106224803A (en) * | 2016-08-12 | 2016-12-14 | 东莞市超阳光电科技有限公司 | A kind of LED decorative lamp |
| CN109643913A (en) * | 2016-08-22 | 2019-04-16 | 昕诺飞控股有限公司 | Interface circuit and external circuit |
-
2013
- 2013-04-11 CN CN 201320182484 patent/CN203251464U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682743A (en) * | 2015-02-10 | 2015-06-03 | 厦门台和电子有限公司 | Multi-output power adapter circuit |
| CN106224803A (en) * | 2016-08-12 | 2016-12-14 | 东莞市超阳光电科技有限公司 | A kind of LED decorative lamp |
| CN109643913A (en) * | 2016-08-22 | 2019-04-16 | 昕诺飞控股有限公司 | Interface circuit and external circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20140411 |