CN202514121U - LED driving power supply compatible with electronic ballast - Google Patents
LED driving power supply compatible with electronic ballast Download PDFInfo
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- CN202514121U CN202514121U CN2012200786063U CN201220078606U CN202514121U CN 202514121 U CN202514121 U CN 202514121U CN 2012200786063 U CN2012200786063 U CN 2012200786063U CN 201220078606 U CN201220078606 U CN 201220078606U CN 202514121 U CN202514121 U CN 202514121U
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Abstract
The utility model provides an LED driving power supply compatible with an electronic ballast. The LED driving power supply comprises a high voltage absorption circuit. The high voltage absorption circuit comprises a voltage threshold. The high voltage absorption circuit is used to absorb the output voltage of the electronic ballast. When the output voltage is higher than the voltage threshold, the high voltage absorption circuit absorbs the output voltage of the electronic ballast to ensure that the output voltage at the moment can not be transferred to a post-stage circuit of the LED driving power supply. When the output voltage is less than the voltage threshold, the high voltage absorption circuit does not work, and the output voltage at the moment can be transferred to the post-stage circuit. According to the utility model, the LED driving power supply compatible with the electronic ballast absorbs the high voltage of the electronic ballast at a starting stage to prevent the high voltage from flowing into the post-stage circuit and from damaging the post-stage circuit, thus the normal work of the LED driving power supply is ensured.
Description
Technical field
The utility model relates to electronic technology field, relates to a kind of LED driving power specifically.
Background technology
In lighting field, fluorescent lamp has obtained between decades in the past to use widely as a kind of traditional low voltage mercury-vapour discharge lamp.Fluorescent lamp needs the high pressure of an about 1000V to trigger startup, needs a power frequency (50Hz/60Hz) or high frequency (about 40kHz) electric current to support at run duration.Therefore, in traditional application, mostly all has a supporting electric ballast.The service behaviour of the fluorescent lamp performance with electric ballast to a great extent is relevant, the service behaviour of fluorescent lamp and the service behaviour of electric ballast is complementary (like the operating characteristic of lamp impedance and lamp), so that fluorescent lamp can be operated in optimum state.
LED is a kind of semiconductor device, and the LED illumination is a semiconductor lighting, also is called solid-state illumination.LED does not need preheating, need not start with a high pressure yet, and only need a constant-current driving, and require each the LED electric current in the led array to be complementary.As a kind of illumination component of environmental protection and energy saving, the LED illumination has shown its application prospects.
In the prior art, existed some can realize utilizing electronic ballast for fluoresent lamp to come the technology of driving LED.But in these implementations, fluorescent lamp is in start-up course, and the output voltage of electric ballast is one to have the transient state state of sudden change.With reference to fluorescent lamp starting-steady state voltage curve chart shown in Figure 1; It is thus clear that in the fluorescent lamp starting stage, said electric ballast can be exported the very big high pressure of a numerical value, prevailing value is at 500V-2000V; After starting completion; Fluorescent lamp carries out the transition to steady-state process by transient process, and the output voltage stabilization of final electric ballast is at a magnitude of voltage, and said magnitude of voltage is confirmed by the fluorescent tube length and the power of fluorescent lamp.When directly applying to the LED driving power, the LED driving power can't bear the high pressure of start-up course, can damage late-class circuit, causes the LED driving power can't operate as normal.
Summary of the invention
In view of this, the purpose of the utility model is to provide a kind of new LED driving power, electric ballast the startup stage, can high pressure be absorbed, avoid it to flow into late-class circuit and cause the damage of circuit.
According to the LED driving power of a kind of compatible electronic ballast of the utility model one embodiment, comprise that a high pressure absorbs circuit, said high pressure absorbs circuit and comprises a voltage threshold;
Said high pressure absorbs circuit in order to receive the output voltage of said electric ballast;
When said output voltage was higher than said voltage threshold, said high pressure absorbed circuit said output voltage is absorbed, and guaranteed that the output voltage of this moment can not be passed to late-class circuit;
When said output voltage during less than said voltage threshold, said high pressure absorbs circuit does not work, and the said output voltage of this moment is passed to late-class circuit.
Preferably, said high pressure absorption circuit comprises threshold circuit and absorbs circuit; Wherein,
Said threshold circuit comprises said voltage threshold, in order to receive the output voltage of said electric ballast;
Said absorption circuit is connected with said threshold circuit, and when said output voltage during greater than said voltage threshold, said output voltage is absorbed through said absorption circuit.
Preferably, said threshold circuit comprises a piezo-resistance, and the limit value voltage and the said voltage threshold of said piezo-resistance are complementary.
Preferably, said threshold circuit comprises a comparator and a switch, and two inputs of said comparator receive a voltage signal and a reference voltage that characterizes said output voltage respectively, and said reference voltage and said voltage threshold are complementary; Said switch is connected to the output of said comparator;
When said output voltage during greater than said voltage threshold, said comparator is controlled said switch closure, and said output voltage is passed to the absorption circuit.
Preferably; Said absorption circuit comprises a transformer and a RC network; Said transformer is connected with said threshold circuit, and when said output voltage during greater than said voltage threshold, said output voltage is passed to said RC network through said transformer; Through attenuated oscillation, the output voltage of said electric ballast is decreased to a safety value.
Further, the LED driving power of compatible electronic ballast also comprises filter network, rectification circuit, filter capacitor and voltage conversion circuit; Wherein,
Said filter network carries out filtering to the output voltage of the said electric ballast that receives, to obtain an alternating voltage;
Said rectification circuit is connected with said filter network, so that said alternating voltage is carried out rectification, to obtain the direct voltage of a pulsation;
Said filter capacitor receives said direct voltage, to be converted into a level and smooth direct voltage;
Said voltage conversion circuit receives said level and smooth direct voltage, and produces certain voltage and current, drives a LED lamp.
Preferably, said voltage conversion circuit is isolated form or non-isolation type topological structure.
According to the LED driving power of the compatible electronic ballast of the utility model, the high pressure the startup stage of can be with electric ballast absorbs, and avoids it to flow into late-class circuit, and damages late-class circuit, guarantees the operate as normal of LED driving power.
Description of drawings
Shown in Figure 1 is fluorescent lamp starting of the prior art-steady state voltage curve chart;
Shown in Figure 2 is theory diagram according to the LED driving power of first embodiment of the utility model;
Shown in Figure 3 is theory diagram according to the LED driving power of second embodiment of the utility model;
Shown in Figure 4 is the theory diagram that absorbs first embodiment of circuit according to the high pressure of the LED driving power of the utility model;
Shown in Figure 5 is the theory diagram that absorbs second embodiment of circuit according to the high pressure of the LED driving power of the utility model.
Embodiment
Be described in detail below in conjunction with the several preferred embodiments of accompanying drawing, but the utility model is not restricted to these embodiment the utility model.The utility model is contained substituting of making on any marrow and scope at the utility model, modification, equivalent method and scheme.Understand for the public is had completely the utility model, in following the utility model preferred embodiment, specified concrete details, and do not had the description of these details also can understand the utility model fully for a person skilled in the art.
Shown in Figure 2 is theory diagram according to the LED driving power of first embodiment of the utility model.In this embodiment, said LED driving power comprises filter network 201, rectification circuit 202, and filter capacitor 203, voltage conversion circuit 204 absorbs circuit 206 with high pressure.Wherein,
The output voltage AC of 201 pairs of said electric ballasts that receive of said filter network carries out filtering, to obtain an alternating voltage;
Said rectification circuit 202 is connected with said filter network 201, so that said alternating voltage is carried out rectification, to obtain the direct voltage of a pulsation;
Said filter capacitor 203 receives said direct voltage, to be converted into a level and smooth direct voltage;
Said voltage conversion circuit 204 receives said level and smooth direct voltage, and produces certain voltage and current, drives said LED lamp 205;
Said high pressure absorbs circuit 206 and comprises a voltage threshold;
Said high pressure absorbs the high tension voltage AC of circuit 206 in order to the output that receives said electric ballast;
When the output voltage AC of said electric ballast was higher than said voltage threshold, said high pressure absorbed circuit 206 said output voltage AC is absorbed, and guaranteed that the output voltage AC of this moment can not be passed to late-class circuit;
As said output voltage AC during less than said voltage threshold, said high pressure absorbs circuit 206 does not work, and the said output voltage AC of this moment is passed to late-class circuit.
Wherein, said voltage conversion circuit 204 can be isolated form (like inverse-excitation type) or non-isolation type (perhaps boosting-voltage-dropping type like voltage-dropping type, booster type) topological structure.
Absorb circuit 206 through said high pressure, electric ballast the startup stage, can high pressure be absorbed, avoid it to flow into late-class circuit and cause the damage of circuit.
Theory diagram with reference to the LED driving power of second embodiment according to the utility model shown in Figure 3.In this embodiment, filter network 304 comprises inductance L 1, capacitor C 1 and capacitor C 2; Rectification circuit 305 can be the rectifier bridge that is constituted by a diode; Voltage conversion circuit 307 is the reverse exciting topological structure, and it comprises transformer T1, power switch tube S 1, and output diode D1, output capacitance C3 and control circuit 308, its operation principle is identical with prior art, repeats no more at this.
High pressure absorbs circuit 303 and comprises threshold circuit 301 and absorb circuit 302; Threshold circuit 301 has a voltage threshold, and it receives the output voltage AC of electric ballast.As said output voltage AC during greater than said voltage threshold; Through said threshold circuit 301; Output voltage AC is passed to and absorbs circuit 302; Thereby the bigger output voltage AC of numerical value this moment is absorbed, avoid flowing into back level filter network 304, rectification circuit 305 etc., guarantee the operate as normal of LED driving power.
Embodiment shown in Figure 3 has enumerated a kind of concrete implementation of different circuit parts, and like filter network or voltage conversion circuit, those skilled in the art can learn that any other suitable circuit all can be replaced corresponding circuit part.
Below in conjunction with specific embodiment, specify the operation principle that absorbs circuit according to the high pressure of the utility model.
Absorb the theory diagram of first embodiment of circuit with reference to shown in Figure 4 according to the high pressure of the utility model, in this embodiment, the threshold circuit 401 that high pressure absorbs in the circuit comprises resistance R 1, capacitor C 4 and piezo-resistance RV1; The limit value voltage and the voltage threshold of said piezo-resistance are complementary.Resistance R 1 and capacitor C 4 are connected to two outputs of output voltage AC, and the end of piezo-resistance RV1 is connected to the points of common connection of resistance R 1 and capacitor C 4, and the other end is connected to and absorbs circuit 402.
As said output voltage AC during greater than said voltage threshold, piezo-resistance RV1 conducting, said output voltage AC is passed to said RC network through said transformer T2, and through attenuated oscillation, said output voltage AC is decreased to a safety value.
As said output voltage AC during less than said voltage threshold, not conducting of said piezo-resistance RV2, output voltage AC normal delivery is to late-class circuit.
Absorb the theory diagram of second embodiment of circuit with reference to shown in Figure 5 according to the high pressure of the utility model, in this embodiment, it is identical with example structure shown in Figure 4 to absorb circuit, repeats no more at this.Different is, threshold circuit 501 comprises the resistance pressure-dividing network of being made up of resistance R 3 and resistance R 4, comparison circuit CMP and switch S 2, wherein,
The resistance pressure-dividing network of being made up of resistance R 3 and resistance R 4 carries out the dividing potential drop sampling to the output voltage AC of the electric ballast that receives, to obtain the sampled voltage of the said output voltage AC of sign at its points of common connection place; The inverting input of said comparison circuit CMP receives said sampled voltage, and in-phase input end receives a reference voltage V
Ref, said reference voltage V
RefCharacterize said voltage threshold; The state of the output Signal-controlled switch S2 of comparison circuit CMP; One termination of said switch S 2 is received said output voltage AC, and the other end is connected to and absorbs circuit 402;
When said sampled voltage during greater than said reference voltage, when promptly output voltage is greater than said voltage threshold, said switch S 2 closures of the output signal controlling of said comparison circuit CMP, output voltage AC is passed to and absorbs circuit 402, and is absorbed; When said sampled voltage during less than said reference voltage; Be that output voltage is during less than said voltage threshold; The said switch S 2 of the output signal controlling of said comparison circuit CMP is broken off, and output voltage can't be passed to and absorb circuit 402, but is passed to late-class circuit such as filter network, rectification circuit etc.
In sum; Adopt the LED driving power of the utility model embodiment; Through one have predetermined voltage threshold high pressure absorb circuit, the output voltage of the high voltage numerical value that produces the startup stage of with electron rectifier absorbs, and avoids it to flow into late-class circuit; And the damage late-class circuit makes the application scenario that said LED driving power can the compatible electronic ballast.
More than the LED driving power according to the compatible electronic rectifier of the preferred embodiment of the utility model has been carried out detailed description, those of ordinary skills can know other technologies or structure and circuit layout, element etc. in view of the above by inference and all can be applicable to said embodiment.
Embodiment according to the utility model is as indicated above, and these embodiment do not have all details of detailed descriptionthe, do not limit this utility model yet and are merely described specific embodiment.Obviously, according to above description, can do a lot of modifications and variation.These embodiment are chosen and specifically described to this specification, is principle and practical application in order to explain the utility model better, thereby person skilled can utilize the utility model and the modification on the utility model basis to use well under making.The utility model only receives the restriction of claims and four corner and equivalent.
Claims (7)
1. the LED driving power of a compatible electronic ballast is characterized in that, comprises that a high pressure absorbs circuit, and said high pressure absorbs circuit and comprises a voltage threshold;
Said high pressure absorbs circuit in order to receive the output voltage of said electric ballast;
When said output voltage was higher than said voltage threshold, said high pressure absorbed circuit said output voltage is absorbed, and guaranteed that the output voltage of this moment can not be passed to late-class circuit;
When said output voltage during less than said voltage threshold, said high pressure absorbs circuit does not work, and the said output voltage of this moment is passed to late-class circuit.
2. LED driving power according to claim 1 is characterized in that, said high pressure absorbs circuit and comprises threshold circuit and absorb circuit; Wherein,
Said threshold circuit comprises said voltage threshold, in order to receive the output voltage of said electric ballast;
Said absorption circuit is connected with said threshold circuit, and when said output voltage during greater than said voltage threshold, said output voltage is absorbed through said absorption circuit.
3. LED driving power according to claim 2 is characterized in that said threshold circuit comprises a piezo-resistance, and the limit value voltage and the said voltage threshold of said piezo-resistance are complementary.
4. LED driving power according to claim 2; It is characterized in that; Said threshold circuit comprises a comparator and a switch; Two inputs of said comparator receive the voltage signal and a reference voltage of the output voltage that characterizes said electric ballast respectively, and said reference voltage and said voltage threshold are complementary; Said switch is connected to the output of said comparator;
When said output voltage during greater than said voltage threshold, said comparator is controlled said switch closure, and said output voltage is passed to the absorption circuit.
5. LED driving power according to claim 2; It is characterized in that said absorption circuit comprises a transformer and a RC network, said transformer is connected with said threshold circuit; When said output voltage during greater than said voltage threshold; Said output voltage is passed to said RC network through said transformer, and through attenuated oscillation, said output voltage is decreased to a safety value.
6. LED driving power according to claim 1 is characterized in that, also comprises filter network, rectification circuit, filter capacitor and voltage conversion circuit; Wherein,
Said filter network carries out filtering to the output voltage of the said electric ballast that receives, to obtain an alternating voltage;
Said rectification circuit is connected with said filter network, so that said alternating voltage is carried out rectification, to obtain the direct voltage of a pulsation;
Said filter capacitor receives said direct voltage, to be converted into a level and smooth direct voltage;
Said voltage conversion circuit receives said level and smooth direct voltage, and produces certain voltage and current, drives a LED lamp.
7. LED driving power according to claim 6 is characterized in that, said voltage conversion circuit is isolated form or non-isolation type topological structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200786063U CN202514121U (en) | 2012-03-01 | 2012-03-01 | LED driving power supply compatible with electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200786063U CN202514121U (en) | 2012-03-01 | 2012-03-01 | LED driving power supply compatible with electronic ballast |
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| CN202514121U true CN202514121U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200786063U Expired - Lifetime CN202514121U (en) | 2012-03-01 | 2012-03-01 | LED driving power supply compatible with electronic ballast |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595736A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
| CN105142301A (en) * | 2015-09-27 | 2015-12-09 | 电子科技大学中山学院 | Compatible multi-circuit intelligent power supply device |
-
2012
- 2012-03-01 CN CN2012200786063U patent/CN202514121U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595736A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
| CN102595736B (en) * | 2012-03-01 | 2014-09-17 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
| CN105142301A (en) * | 2015-09-27 | 2015-12-09 | 电子科技大学中山学院 | Compatible multi-circuit intelligent power supply device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 10, 310023 floor, B zone, HOLLEY Science Park, No. 181, Wuchang Road, Yuhang District, Zhejiang, Hangzhou Patentee after: Hangzhou Letu Photoelectric Technology Co., Ltd. Address before: 10, 310023 floor, B zone, HOLLEY Science Park, No. 181, Wuchang Road, Zhejiang, Hangzhou Patentee before: Hangzhou Letu Photoelectric Technology Co., Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: Hangzhou Letu Photoelectric Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190604 Address after: 237300 Standardized Workshop B-8 of Jinwutong Pioneer Park, Jinzhai Modern Industrial Park, Luan City, Anhui Province Patentee after: Anhui Letu Electronic Technology Co., Ltd. Address before: 310023 10/F, Huali Science Park B, 181 Wuchang Avenue, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Letu Photoelectric Technology Co., Ltd. |
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| TR01 | Transfer of patent right | ||
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Addressee: Hangzhou Letu Photoelectric Technology Co., Ltd. Document name: Notification of Passing Examination on Formalities |
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| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
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| CX01 | Expiry of patent term |