CN104470088A - Grid drive system for LED lamp protection system - Google Patents
Grid drive system for LED lamp protection system Download PDFInfo
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- CN104470088A CN104470088A CN201410675979.2A CN201410675979A CN104470088A CN 104470088 A CN104470088 A CN 104470088A CN 201410675979 A CN201410675979 A CN 201410675979A CN 104470088 A CN104470088 A CN 104470088A
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Abstract
The invention discloses a grid drive system for an LED lamp protection system. The grid drive system is characterized by mainly comprising a transformer T, a drive chip M, a switchable current source connected between a VCC pin and an INP pin of the drive chip M in series, a diode D1 connected between the VCC pin and a BOOST pin of the drive chip M in series, a capacitor C3 connected between the BOOST pin and a TG pin of the drive chip M in series, a resistor R7 connected between the TG pin and a TS pin of the drive chip M in series, and a transistor Q4, wherein the base of the transistor Q4 is connected with the TG pin of the drive chip M, the collector of the transistor Q4 is grounded after passing through a capacitor C4 and a capacitor C5, and the emitter of the transistor Q4 is grounded. The grid drive system for the LED lamp protection system not only has the short circuit protection, over-voltage protection and open circuit protection functions, but also is low in power consumption, and the starting time of the system is only one fourth that of a traditional grid drive circuit.
Description
Technical field
The present invention relates to a kind of LED drive circuit, specifically refer to a kind of LED protection system raster data model system.
Background technology
At present, because LED has, energy consumption is low, the feature such as long service life and safety and environmental protection, and it has become one of main product of people's life lighting.Because LED is different from traditional incandescent lamp, therefore its needs are driven by special drive circuit.But, the widely used gate driver circuit of current people due to the irrationality of its project organization, defects such as result in current gate driver circuit and have that energy consumption is higher, current noise comparatively large and start-up time is longer.
Summary of the invention
The object of the invention is to the defect that energy consumption is higher, current noise is comparatively large and start-up time is longer overcoming the existence of current gate driver circuit; a kind of reasonable in design is provided; can effectively reduce energy consumption and current noise, obviously shorten the LED protection system gate driver circuit of start-up time.
Object of the present invention is achieved through the following technical solutions: a kind of LED protection system raster data model system, primarily of transformer T, driving chip M, be serially connected with the switched current source between the VCC pin of driving chip M and INP pin, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C3 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R7 between the TG pin of driving chip M and TS pin, and base stage is connected with the TG pin of driving chip M, collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, and the transistor Q4 of grounded emitter forms.
The Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, ground connection after its non-same polarity is then connected with the emitter of transistor Q4; Meanwhile, the emitter of transistor Q4 is also connected with the TS pin of driving chip M, and the secondary coil of described transformer T is provided with tap Y1 and tap Y2.
Described switched current source is by transistor Q1, transistor Q2, transistor Q3, DC power supply S, be serially connected in the resistance R1 between the collector electrode of transistor Q1 and the collector electrode of transistor Q2, be serially connected in the RC filter circuit between the emitter of transistor Q1 and the negative pole of DC power supply S, be serially connected in the resistance R2 between the base stage of transistor Q1 and the negative pole of DC power supply S, the resistance R5 in parallel with DC power supply S-phase, be serially connected in the resistance R6 between the emitter of transistor Q3 and the negative pole of DC power supply S, be serially connected in the resistance R4 between the collector electrode of transistor Q3 and the collector electrode of transistor Q2, and positive pole is connected with the collector electrode of transistor Q2, the polar capacitor C2 that negative pole is connected with the negative pole of DC power supply S forms, the base stage of described transistor Q2 is also connected with the collector electrode of transistor Q1, and the base stage of transistor Q3 is then connected with the positive pole of DC power supply S with the emitter of transistor Q2 respectively, the VCC pin of described driving chip M is connected with the positive pole of polar capacitor C2, and the INP pin of driving chip M is then connected with the negative pole of polar capacitor C2.
For guaranteeing result of use, described driving chip M is LTC4440A integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention not only has the function of short-circuit protection, overvoltage protection and open-circuit-protection, and its power consumption is lower, is only 1/4 of conventional gate drive circuit start-up time its start-up time.
(2) the present invention is provided with the switched current source carried, and therefore effectively can avoid external electromagnetic interference, meanwhile, can reduce current noise significantly.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention is made up of transistor Q4, transformer T, driving chip M, switched current source, diode D1, electric capacity C3, resistance R7, electric capacity C4 and electric capacity C5.During connection, switched current source needs to be serially connected with between the VCC pin of driving chip M and INP pin, and diode D1 is serially connected with between the VCC pin of driving chip M and BOOST pin, electric capacity C3 is serially connected with between the BOOST pin of driving chip M and TG pin, and resistance R7 is then serially connected with between the TG pin of driving chip M and TS pin.
The base stage of described transistor Q4 is connected with the TG pin of driving chip M, and its collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, its grounded emitter.Meanwhile, the collector electrode of this transistor Q4 also needs the driving voltage of external+6V, to guarantee that transistor Q4 can normally run.
Wherein, the Same Name of Ends of the primary coil of transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, ground connection after its non-same polarity is then connected with the emitter of transistor Q4.Meanwhile, the emitter of transistor Q4 is also connected with the TS pin of driving chip M.
The secondary coil of transformer T is provided with tap Y1 and tap Y2, and namely by this tap Y1 and tap Y2, the present invention is formed with 4 outputs, the i.e. Same Name of Ends of secondary coil on the secondary coil of transformer T, the non-same polarity of Y1 tap, Y2 tap and secondary coil.
Switched current source is used for providing working power to driving chip M, it is by transistor Q1, transistor Q2, transistor Q3, DC power supply S, be serially connected in the resistance R1 between the collector electrode of transistor Q1 and the collector electrode of transistor Q2, be serially connected in the RC filter circuit between the emitter of transistor Q1 and the negative pole of DC power supply S, be serially connected in the resistance R2 between the base stage of transistor Q1 and the negative pole of DC power supply S, the resistance R5 in parallel with DC power supply S-phase, be serially connected in the resistance R6 between the emitter of transistor Q3 and the negative pole of DC power supply S, be serially connected in the resistance R4 between the collector electrode of transistor Q3 and the collector electrode of transistor Q2, and positive pole is connected with the collector electrode of transistor Q2, the polar capacitor C2 that negative pole is connected with the negative pole of DC power supply S forms.
Meanwhile, the base stage of this transistor Q2 is also connected with the collector electrode of transistor Q1, and the base stage of transistor Q3 is then connected with the positive pole of DC power supply S with the emitter of transistor Q2 respectively; The VCC pin of described driving chip M is connected with the positive pole of polar capacitor C2, and the INP pin of driving chip M is then connected with the negative pole of polar capacitor C2.
Described RC filter circuit is then formed in parallel by resistance R3 and electric capacity C1, and namely after resistance R3 and electric capacity C1 parallel connection, an one common port is connected with the emitter of transistor Q1, its another common port is then connected with the negative pole of DC power supply S.
For guaranteeing result of use, the high-frequency N-channel MOS FET grid drive chip that this driving chip M preferentially adopts Linear Techn Inc. to produce, i.e. LTC4440A integrated chip.This driving chip can with the input voltage work up to 80V, up to can continuous operation during 100V transient state.As mentioned above, just the present invention can well be realized.
Claims (3)
1. a LED protection system raster data model system, it is characterized in that, primarily of transformer T, driving chip M, be serially connected with the switched current source between the VCC pin of driving chip M and INP pin, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C3 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R7 between the TG pin of driving chip M and TS pin, and base stage is connected with the TG pin of driving chip M, collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, and the transistor Q4 of grounded emitter forms, the Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, ground connection after its non-same polarity is then connected with the emitter of transistor Q4, meanwhile, the emitter of transistor Q4 is also connected with the TS pin of driving chip M, and the secondary coil of described transformer T is provided with tap Y1 and tap Y2.
2. a kind of LED protection system raster data model system according to claim 1, it is characterized in that, described switched current source is by transistor Q1, transistor Q2, transistor Q3, DC power supply S, be serially connected in the resistance R1 between the collector electrode of transistor Q1 and the collector electrode of transistor Q2, be serially connected in the RC filter circuit between the emitter of transistor Q1 and the negative pole of DC power supply S, be serially connected in the resistance R2 between the base stage of transistor Q1 and the negative pole of DC power supply S, the resistance R5 in parallel with DC power supply S-phase, be serially connected in the resistance R6 between the emitter of transistor Q3 and the negative pole of DC power supply S, be serially connected in the resistance R4 between the collector electrode of transistor Q3 and the collector electrode of transistor Q2, and positive pole is connected with the collector electrode of transistor Q2, the polar capacitor C2 that negative pole is connected with the negative pole of DC power supply S forms, the base stage of described transistor Q2 is also connected with the collector electrode of transistor Q1, and the base stage of transistor Q3 is then connected with the positive pole of DC power supply S with the emitter of transistor Q2 respectively, the VCC pin of described driving chip M is connected with the positive pole of polar capacitor C2, and the INP pin of driving chip M is then connected with the negative pole of polar capacitor C2.
3. a kind of LED protection system raster data model system according to claim 1 and 2, it is characterized in that, described driving chip M is LTC4440A integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675979.2A CN104470088A (en) | 2014-11-22 | 2014-11-22 | Grid drive system for LED lamp protection system |
| CN201510324193.0A CN104968088A (en) | 2014-11-22 | 2015-06-13 | Grid driving system used for LED lamp protection system based on boost voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675979.2A CN104470088A (en) | 2014-11-22 | 2014-11-22 | Grid drive system for LED lamp protection system |
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| CN104470088A true CN104470088A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410675979.2A Pending CN104470088A (en) | 2014-11-22 | 2014-11-22 | Grid drive system for LED lamp protection system |
| CN201510324193.0A Pending CN104968088A (en) | 2014-11-22 | 2015-06-13 | Grid driving system used for LED lamp protection system based on boost voltage stabilizing circuit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510324193.0A Pending CN104968088A (en) | 2014-11-22 | 2015-06-13 | Grid driving system used for LED lamp protection system based on boost voltage stabilizing circuit |
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| CN (2) | CN104470088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780661A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | LED drive system based on gate drive |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106612578A (en) * | 2015-10-21 | 2017-05-03 | 香港商酷异有限公司 | Driving circuit capable of preventing electromagnetic interference |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5322849B2 (en) * | 2009-08-25 | 2013-10-23 | 学校法人金沢工業大学 | Light emitting diode driving circuit, light emitting device and lighting device using the same |
| CN201860484U (en) * | 2010-09-17 | 2011-06-08 | 深圳市贝仕达克电子有限公司 | Driving power supply of LED lamp |
| CN203340371U (en) * | 2013-07-06 | 2013-12-11 | 张新安 | Low-power LED lamp driving power supply |
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2014
- 2014-11-22 CN CN201410675979.2A patent/CN104470088A/en active Pending
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- 2015-06-13 CN CN201510324193.0A patent/CN104968088A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780661A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | LED drive system based on gate drive |
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| CN104968088A (en) | 2015-10-07 |
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Application publication date: 20150325 |