CN203968429U - A kind of LED drives surge voltage protection circuit and drive circuit - Google Patents
A kind of LED drives surge voltage protection circuit and drive circuit Download PDFInfo
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- CN203968429U CN203968429U CN201320850519.XU CN201320850519U CN203968429U CN 203968429 U CN203968429 U CN 203968429U CN 201320850519 U CN201320850519 U CN 201320850519U CN 203968429 U CN203968429 U CN 203968429U
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- 239000004065 semiconductor Substances 0.000 claims description 44
- 239000003990 capacitor Substances 0.000 description 7
- 230000010354 integration Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
- Rectifiers (AREA)
Abstract
The utility model provides a kind of LED to drive surge voltage protection circuit and drive circuit, and LED drives surge voltage protection circuit to comprise a RC integrating circuit and an independent capacitance; Described RC integrating circuit is for the protection of the power input of IC chip; The anodal one end of described independent capacitance is connected to the control switch input of LED chip string, and the other end is connected with the low-voltage input of rectification circuit.The utility model is simple in structure, with low cost, protects effectively, is applicable to high pressure and moment surge voltage protection.
Description
Technical field
The utility model relates to a kind of LED integrated circuit (IC) design.
Background technology
LED chip is efficient with it, high integration, and the high life is in novel energy-conserving light source field
Be used widely.In LED light source, power drives is more crucial technology.Due to high integration and low cost requirement to LED application, the share that the LED drive scheme of the energy storage devices such as non-inductance electric heating appearance accounts in market is increasing.But, because such drive scheme is independently " photo engine ", must direct compatible external power supply, therefore its LED chip and IC chip all must can bear complicated electromagnetic environment.In common electromagnetic interference, it is so-called surge (power surge) that exposed IC chip is threatened to maximum, such disturbs the inductance resistance electromotive force producing while generally appearing at mains switch, and does not meet strong electromagnetic noise that the electrical equipment of electromagnetism standard produces at work etc.It shows as one or several high-voltage pulse in a short time.Do not have protection circuit in, this class high-voltage pulse can puncture common or even high voltage bearing chip easily, cause circuit damage.For the protection of such pulse, conventional method is to adopt the high pressure protection devices such as large electrochemical capacitor and zener at current path.Not only volume is larger for this class device, and protection effect is unreliable, is not suitable for being applied in the LED illumination application of high integration.
The LED Driving technique that current non-inductance electric heating holds in theory efficiency can approach 100%.Due to problems such as switching losses, efficiency can reach more than 95% in actual applications, is the technique direction that following main flow LED drives.But this class circuit is a relative short slab to the surge protection of electrical network.
Utility model content
The technical problem that the utility model solves is, provides a kind of simple in structure, with low cost, protect effective, be applicable to high pressure and moment surge voltage protective circuit and LED drive circuit structure.
In order to address the above problem, the utility model provides a kind of LED to drive surge voltage protection circuit, comprises a RC integrating circuit and an independent capacitance; Described RC integrating circuit is for the protection of the power input of IC chip; The anodal one end of described independent capacitance is connected to the control switch input of LED chip string, and the other end is connected with the low-voltage input of rectification circuit.
The utility model also provides a kind of New LED drive circuit with this surge voltage protection circuit, also comprise rectifier bridge module, IC driver module and LED light source, wherein, described rectifier bridge module is connected with AC power, is delivered to IC driver module for alternating current being converted to direct current; Described IC driver module is connected with LED light source with rectifier bridge module, is used to described LED light source to power and controls the switch of described LED light source; Described IC driver module comprises control circuit and controls the switching tube of LED light source; Described control circuit and switching tube are integrated on a chip.
Further, described switching tube is some metal-oxide-semiconductors.
Further, described LED light source is more than 2 strings.
Further, the quantity of the contained LED of described every string LED light source is identical or not identical.
Further, described RC integrating circuit comprises a resistance and electric capacity; Described resistance and capacitances in series, the high potential input of rectifier bridge module described in described resistance one termination, another port connects described electric capacity, and another port of described electric capacity connects the low pressure input of described rectifier bridge module, if described electric capacity is the device that has polarity, positive pole is connected with described resistance.
Described metal-oxide-semiconductor is 4, is respectively the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; Described LED light source is 3 strings of series connection mutually, is respectively the first LED light source string, the second LED light source string and the 3rd LED light source string;
The drain electrode of described the first metal-oxide-semiconductor connects the negative pole of described the first LED light source string; The source electrode of described the first metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module; The grid of described the first metal-oxide-semiconductor connects described control circuit;
The drain electrode of described the second metal-oxide-semiconductor connects the negative pole of described the second LED light source string; The source electrode of described the second metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module;
The drain electrode of described the 3rd metal-oxide-semiconductor connects the negative pole of described the 3rd LED light source string; The source electrode of described the 3rd metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module;
The drain electrode of described the 4th metal-oxide-semiconductor is connected between described resistance and electric capacity; The source electrode of described the 4th metal-oxide-semiconductor connects described control circuit.
Further, described independent capacitance one end is connected with the control switch input of LED string, and the low-voltage input of another port and rectification circuit is connected; If independent capacitance is the device that has polarity, positive pole is connected with the input of control switch.
The utility model has the advantages that:
Simple in structure, with low cost, protect effectively, be applicable to high pressure and moment surge voltage protection.
Utilize technology of the present utility model, solved the surge protection problem that LED drives, retained the high integration of drive circuit simultaneously.Utilize the utility model, drive circuit can be integrated in same illumination cavities with luminescence chip, has realized maximum integrated.Due to the dependence of having broken away from electrochemical capacitor, the life-span can reach more than 20,000 hours.
Brief description of the drawings
Fig. 1 is that a kind of New LED of the utility model drives surge voltage protection circuit diagram.
Embodiment
Hereinafter in connection with accompanying drawing, embodiment of the present utility model is elaborated.It should be noted that, in the situation that not conflicting, the combination in any mutually of the feature in embodiment and embodiment in the application.
Embodiment mono-:
The utility model provides a kind of New LED as shown in Figure 1 to drive surge voltage protection circuit, comprises a RC integrating circuit and an independent capacitance C2; RC integrating circuit is for the protection of the power input of IC chip; The anodal one end of independent capacitance C2 is connected to the control switch input of LED chip string, and the other end is connected with the low-voltage input of rectification circuit.
The utility model also provides a kind of New LED drive circuit with this surge voltage protection circuit, also comprise rectifier bridge module, IC driver module and LED light source, wherein, rectifier bridge module is connected with AC power, is delivered to IC driver module for alternating current being converted to direct current; IC driver module is connected with LED light source with rectifier bridge module, is used to LED light source to power and controls the switch of LED light source; IC driver module comprises control circuit and controls the switching tube of LED light source; Control circuit and switching tube are integrated on a chip.
RC integrating circuit comprises a resistance R 1 and capacitor C 1; Resistance R 1 and capacitor C 1 are connected, the high potential input of resistance R 1 one termination rectifier bridge modules, another port connects capacitor C 1, and another port of capacitor C 1 connects the low pressure input of rectifier bridge module, if capacitor C 1 is the device that has polarity, positive pole is connected with resistance R 1.
Switching tube is 4 metal-oxide-semiconductors, is respectively the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M0; LED light source is 3 strings of series connection mutually, is respectively the first LED light source string, the second LED light source string and the 3rd LED light source string;
The drain electrode of the first metal-oxide-semiconductor M1 connects the negative pole of the first LED light source string; The source electrode of the first metal-oxide-semiconductor M1 connects the low pressure input of rectifier bridge module; The grid of the first metal-oxide-semiconductor M1 connects control circuit;
The drain electrode of the second metal-oxide-semiconductor M2 connects the negative pole of the second LED light source string; The source electrode of the second metal-oxide-semiconductor M2 connects the low pressure input of rectifier bridge module;
The drain electrode of the 3rd metal-oxide-semiconductor M3 connects the negative pole of the 3rd LED light source string; The source electrode of the 3rd metal-oxide-semiconductor M3 connects the low pressure input of rectifier bridge module;
The drain electrode of the 4th metal-oxide-semiconductor M0 is connected between resistance and electric capacity; The source electrode connection control circuit of the 4th metal-oxide-semiconductor M0.
Independent capacitance C2 one end is connected with the control switch input of LED string, and the low-voltage input of another port and rectification circuit is connected; If independent capacitance C2 is the device that has polarity, positive pole is connected with the input of control switch.
The quantity of the contained LED of every string LED light source is identical or not identical.
The utility model can be realized by discrete device, also can realize by the higher integrated device of integrated level.In LED aluminium base circuit, by the very little chip ceramic capacitor of volume or tantalum electric capacity, can, easily integrated to this protective circuit and integrated chip, greatly save volume and the cost of circuit.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (7)
1. LED drives a surge voltage protection circuit, it is characterized in that, comprises a RC integrating circuit and an independent capacitance; Described RC integrating circuit is for the protection of the power input of IC chip; The anodal one end of described independent capacitance is connected to the control switch input of LED chip string, and the other end is connected with the low-voltage input of rectification circuit.
2. with a LED drive circuit for surge voltage protection circuit as claimed in claim 1, it is characterized in that:
Also comprise rectifier bridge module, IC driver module and LED light source, wherein,
Described rectifier bridge module is connected with AC power, is delivered to IC driver module for alternating current being converted to direct current;
Described IC driver module is connected with LED light source with rectifier bridge module, is used to described LED light source to power and controls the switch of described LED light source; Described IC driver module comprises control circuit and controls the switching tube of LED light source; Described control circuit and switching tube are integrated on a chip.
3. a kind of LED drive circuit as claimed in claim 2, is characterized in that:
Described switching tube is some metal-oxide-semiconductors.
4. a kind of LED drive circuit as claimed in claim 3, is characterized in that: described LED light source is more than 2 strings.
5. a kind of LED drive circuit as claimed in claim 4, is characterized in that: the quantity of the contained LED of described every string LED light source is identical or not identical.
6. a kind of LED drive circuit as claimed in claim 5, is characterized in that:
Described RC integrating circuit comprises a resistance and electric capacity; Described resistance and capacitances in series, the high potential input of rectifier bridge module described in described resistance one termination, another port connects described electric capacity, and another port of described electric capacity connects the low pressure input of described rectifier bridge module, if described electric capacity is the device that has polarity, positive pole is connected with described resistance;
Described metal-oxide-semiconductor is 4, is respectively the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor; Described LED light source is 3 strings of series connection mutually, is respectively the first LED light source string, the second LED light source string and the 3rd LED light source string;
The drain electrode of described the first metal-oxide-semiconductor connects the negative pole of described the first LED light source string; The source electrode of described the first metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module; The grid of described the first metal-oxide-semiconductor connects described control circuit;
The drain electrode of described the second metal-oxide-semiconductor connects the negative pole of described the second LED light source string; The source electrode of described the second metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module;
The drain electrode of described the 3rd metal-oxide-semiconductor connects the negative pole of described the 3rd LED light source string; The source electrode of described the 3rd metal-oxide-semiconductor connects the low pressure input of described rectifier bridge module;
The drain electrode of described the 4th metal-oxide-semiconductor is connected between described resistance and electric capacity; The source electrode of described the 4th metal-oxide-semiconductor connects described control circuit.
7. a kind of LED drive circuit as claimed in claim 6, is characterized in that:
Described independent capacitance one end is connected with the control switch input of LED string, and the low-voltage input of another port and rectification circuit is connected; If independent capacitance is the device that has polarity, positive pole is connected with the input of control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850519.XU CN203968429U (en) | 2013-12-20 | 2013-12-20 | A kind of LED drives surge voltage protection circuit and drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850519.XU CN203968429U (en) | 2013-12-20 | 2013-12-20 | A kind of LED drives surge voltage protection circuit and drive circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN203968429U true CN203968429U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320850519.XU Expired - Lifetime CN203968429U (en) | 2013-12-20 | 2013-12-20 | A kind of LED drives surge voltage protection circuit and drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731956A (en) * | 2013-12-20 | 2014-04-16 | 易美芯光（北京）科技有限公司 | LED driving power surge voltage protection circuit and driving circuit |
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2013
- 2013-12-20 CN CN201320850519.XU patent/CN203968429U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731956A (en) * | 2013-12-20 | 2014-04-16 | 易美芯光（北京）科技有限公司 | LED driving power surge voltage protection circuit and driving circuit |
| CN103731956B (en) * | 2013-12-20 | 2015-11-11 | 易美芯光（北京）科技有限公司 | A kind of LED drives power surge voltage protection circuit and drive circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |
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| CX01 | Expiry of patent term |