CN104168692A - LED large power drive circuit - Google Patents
LED large power drive circuit Download PDFInfo
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- CN104168692A CN104168692A CN201410313777.3A CN201410313777A CN104168692A CN 104168692 A CN104168692 A CN 104168692A CN 201410313777 A CN201410313777 A CN 201410313777A CN 104168692 A CN104168692 A CN 104168692A
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Abstract
The invention discloses an LED large power drive circuit, consisting of a front-end transformation rectification circuit and a boost voltage transformation circuit which is connected to the front-end transformation rectification circuit. The LED large power drive circuit is characterized in that: the output terminal of the boost voltage transoformation circuit is connected to a micro processing circuit and a power amplification circuit; the micro processing circuit consists of an LED control chip U1 connected to the output terminal of the boost voltage transformation circuit, and a transistor control circuit which is connected to between the LED control chip U1 and a power amplification circuit in series. The invention can provide an LED large power drive circuit which is simple in structure, reasonable in design and low in energy consumption, and can effectively realize the brightness of the LED lamp.
Description
Technical field
The present invention relates to a kind of drive circuit, specifically refer to a kind of LED high-power drive circuit.
Background technology
LED lamp is as novel energy-conserving light source, with its environmental protection, the feature such as energy-conservation, the life-span is long, volume is little, by people, extensively received and adopts.Because LED is the semiconductor device of characteristic sensitivity, there is again negative temperature characteristic, therefore, in application process, LED drive circuit is for impelling LED to play considerable effect in stable, reliable operating state.
Along with people's living standard constantly improves, no matter at home or in shop the brightness of LED lamp and energy consumption are had higher requirement, people need to, when further improving the brightness of LED lamp, need LED light fixture to have lower energy consumption.So people just have higher requirement to LED lamp drive circuit.Yet the power limited of traditional LED drive circuit that at present people adopt, not can solve the pressing issues of LED lamp high brightness, low-power consumption.
Summary of the invention
The object of the invention is to overcome current LED lamp drive circuit design reasonable not, can not finely solve the defect of LED lamp high brightness, low-power consumption, provide a kind of simple in structure, reasonable in design, can effectively realize the LED high-power drive circuit of LED lamp high brightness, low-power consumption.
Object of the present invention is achieved through the following technical solutions: a kind of LED high-power drive circuit, mainly by front end transformation rectification circuit, and the transforming circuit that boosts being connected with this front end transformation rectification circuit forms, at the output of this transforming circuit that boosts, be also connected with micro-processor interface circuit and power amplification circuit; Described micro-processor interface circuit is by the LED control chip U1 being connected with the transforming circuit output that boosts, and the transistor control circuit being serially connected between LED control chip U1 and power amplification circuit forms.
Further, described front end transformation rectified current routing transformer T1, be arranged on the fuse FU on the Same Name of Ends on the former limit of transformer T1, be arranged on the adjustable resistance R1 on the non-same polarity on the former limit of transformer T1, and be arranged on that diode bridge rectifier circuit on transformer T1 secondary is connected with diode bridge rectifier circuit output with one end, the capacitor C 1 of other end ground connection forms; The input of the described transforming circuit that boosts is connected with the output of this diode bridge rectifier circuit.
The described transforming circuit that boosts, by transformer T2, is arranged on the former limit circuit on the former limit of transformer T2, and the secondary circuit being arranged on transformer T2 secondary forms.
Described former limit circuit comprises: the resistance R 3 that one end is connected with diode bridge rectifier circuit output, the other end is connected with the Same Name of Ends of transformer T2 primary coil L3, the P utmost point is connected with diode bridge rectifier circuit output, the N utmost point diode D5 of ground connection after capacitor C 3 and resistance R 2 in turn, the diode D6 that the P utmost point is connected with the N utmost point of diode D5, the N utmost point is connected with the non-same polarity of transformer T2 primary coil L3, and one end is connected with the P utmost point of diode D5, the capacitor C of other end ground connection 2 forms.
Described secondary circuit comprises: the capacitor C 5 that one end is connected with the Same Name of Ends of transformer T2 secondary coil L4, the other end is connected with the VCC pin of LED control chip U1, and input resistance R 8, capacitor C 4 and the resistance R 4 that output is all connected with power amplification circuit that be connected with the non-same polarity of transformer T2 secondary coil L4 forms; Described resistance R 4 and capacitor C 4 parallel connections.
Described transistor control circuit is the transistor VT1 that CT pin is connected, collector electrode is connected with power amplification circuit with LED control chip U1 by base stage, and the resistance R 6 that one end is connected with the base stage of transistor VT1, the other end is connected with the P utmost point of diode D7, the N utmost point of diode D7 is connected with the VFF pin of LED control chip U1 after resistance R 5, and the emitter of this transistor VT1 is also connected with the FB pin of LED control chip U1.
Described power amplification circuit comprises: positive pole is connected with the output of resistance R 8, the power amplifier PA2 of negative pole ground connection after resistance R 7, negative pole is connected with the P utmost point of diode D8, the power amplifier PA1 of positive pole ground connection after resistance R 11, the N utmost point of described diode D8 is connected with the output of capacitor C 4 with resistance R 4, be serially connected in negative pole and the resistance R between output 9 of power amplifier PA2, and the negative pole and 10 compositions of the resistance R between output that are serially connected in power amplifier PA1; And the negative pole of power amplifier PA1 is also connected with the collector electrode of transistor VT1.
Described LED control chip U1 adopts NCP1652 model, and NCP1652 can protect overcurrent and overpower, improves loop response.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) overall structure of the present invention is very simple, not only making and very easy to use, and stability is high.
(2) the present invention and traditional LED drive circuit phase specific output is more powerful, thereby avoids LED lamp bright not because of underpower, and power output can be carried more greatly more LED lamps, meets people's life requirement.
(3) the present invention, when increasing power output, can't increase the energy consumption of input, cost-saving.
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 to this.
Embodiment
As shown in Figure 1, LED high-power drive circuit of the present invention comprises: front end transformation rectification circuit, and the transforming circuit that boosts being connected with the output of this front end transformation rectification circuit, the output of this transforming circuit that boosts is also connected with micro-processor interface circuit and power amplification circuit; Described micro-processor interface circuit is comprised of the LED control chip U1 being connected with the transforming circuit output that boosts and the crystal control circuit being serially connected between LED control chip U1 and power amplification circuit.
Described front end transformation rectified current routing transformer T1, be arranged on the fuse FU on the Same Name of Ends on the former limit of transformer T1, be arranged on the adjustable resistance R1 on the non-same polarity on the former limit of transformer T1, and be arranged on that diode bridge rectifier circuit on transformer T1 secondary is connected with diode bridge rectifier circuit output with one end, the capacitor C 1 of other end ground connection forms; Now, together with the other end of fuse FU and adjustable resistance R1, form the power input of the present embodiment circuit.
The DC filtering voltage that the transforming circuit that boosts is mainly used in that front end transformation rectification circuit the is exported processing of again boosting, and provide working power for micro-processor interface circuit and power amplification circuit.The described transforming circuit that boosts, by transformer T2, is arranged on the former limit circuit on the former limit of transformer T2, and the secondary circuit being arranged on transformer T2 secondary forms.
Described former limit circuit comprises: capacitor C 2, diode D5, capacitor C 3, resistance R 2, resistance R 3 and diode D6.Its connected mode is, one end of resistance R 3 is connected with diode bridge rectifier circuit output, the other end is connected with the Same Name of Ends of the former limit inductance L 3 of transformer T2, the N utmost point of diode D5 is connected with the output of diode bridge rectifier circuit through capacitor C 3 ground connection, its P utmost point after resistance R 2 in turn, the P utmost point of diode D6 is connected with the N utmost point of diode D5, its N utmost point is connected with the non-same polarity of the former limit inductance L 3 of transformer T2, and one end of capacitor C 2 is connected with the output of diode bridge rectifier circuit, its other end ground connection.
Described secondary circuit comprises: capacitor C 5, and resistance R 4, inductance C4, resistance R 8 forms; Described capacitor C 5 one end are connected with the Same Name of Ends of the secondary inductance L4 of transformer T2, the other end is connected with the VCC pin of LED control chip U1, resistance R 4 and inductance C4 are in parallel and a common end is connected with power amplification circuit, another is held respectively is jointly connected with one end of resistance R 8 with the non-same polarity of the secondary inductance L4 of transformer T2, and the other end of resistance R 8 is connected with power amplification circuit.
Described transistor control circuit is the transistor VT1 that CT pin is connected, collector electrode is connected with power amplification circuit with LED control chip U1 by base stage, and the resistance R 6 that one end is connected with the base stage of transistor VT1, the other end is connected with the P utmost point of diode D7, the N utmost point of diode D7 is connected with the VFF pin of LED control chip U1 after resistance R 5, and the emitter of this transistor VT1 is also connected with the FB pin of LED control chip U1.
Described power amplification circuit comprises: power amplifier PA2 and power amplifier PA1, the positive pole of power amplifier PA2 is connected with resistance R 8, the negative pole of power amplifier PA2 ground connection after resistance R 7, the negative pole of power amplifier PA1 is connected with the P utmost point of diode D8, positive pole ground connection after resistance R 11, the N utmost point of described diode D8 is connected with the common end of resistance R 4 and capacitor C 4, resistance R 9 is serially connected with between the negative pole and output of power amplifier PA2, and resistance R 10 is serially connected with between the negative pole and output of power amplifier PA1.
In order to ensure controlling effect, the LED control chip U1 described in the present embodiment preferentially adopts NCP1652 cake core to realize, and this chip can effectively be protected overcurrent and two kinds of situations of overpower, thereby thoroughly improves the loop response time, guarantees stable performance.
During work, from the alternating current of power input input, through front end transformation rectification circuit, carry out forming galvanic current after rectifying and wave-filtering; And then carry out secondary booster through the transforming circuit that boosts, and through power amplification circuit, carry out power amplification again under the control of LED control chip U1, thus realize the feature of LED lamp high brightness, low energy consumption.
As mentioned above, just can well realize the present invention.
Claims (6)
1. a LED high-power drive circuit, mainly by front end transformation rectification circuit, and the transforming circuit that boosts being connected with this front end transformation rectification circuit forms, it is characterized in that, at the output of this transforming circuit that boosts, be also connected with micro-processor interface circuit and power amplification circuit; Described micro-processor interface circuit is by the LED control chip U1 being connected with the transforming circuit output that boosts, and the transistor control circuit being serially connected between LED control chip U1 and power amplification circuit forms.
2. a kind of LED high-power drive circuit according to claim 1, it is characterized in that, described front end transformation rectified current routing transformer T1, be arranged on the fuse FU on the Same Name of Ends on the former limit of transformer T1, be arranged on the adjustable resistance R1 on the non-same polarity on the former limit of transformer T1, and the diode bridge rectifier circuit being arranged on transformer T1 secondary forms; The input of the described transforming circuit that boosts is connected with the output of this diode bridge rectifier circuit.
3. a kind of LED high-power drive circuit according to claim 2, is characterized in that, the described transforming circuit that boosts, by transformer T2, is arranged on the former limit circuit on the former limit of transformer T2, and the secondary circuit being arranged on transformer T2 secondary forms;
Described former limit circuit comprises: the resistance R 3 that one end is connected with diode bridge rectifier circuit output, the other end is connected with the Same Name of Ends of transformer T2 primary coil L3, the diode D5 that the P utmost point is connected with diode bridge rectifier circuit output, the N utmost point is connected with the non-same polarity of transformer T2 primary coil L3 after diode D6, one end is connected with the N utmost point of diode D5, the other end capacitor C 3 of ground connection after resistance R 2, and one end is connected with the P utmost point of diode D5, the capacitor C of other end ground connection 2 forms;
Described secondary circuit comprises: the capacitor C 5 that one end is connected with the Same Name of Ends of transformer T2 secondary coil L4, the other end is connected with the VCC pin of LED control chip U1, and input resistance R 8, capacitor C 4 and the resistance R 4 that output is all connected with power amplification circuit that be connected with the non-same polarity of transformer T2 secondary coil L4 forms.
4. a kind of LED high-power drive circuit according to claim 3, it is characterized in that, described transistor control circuit is the transistor VT1 that CT pin is connected, collector electrode is connected with power amplification circuit with LED control chip U1 by base stage, and resistance R 6 compositions that one end is connected with the base stage of transistor VT1, the other end is connected with the VFF pin of LED control chip U1 after resistance R 5 through diode D7 in turn, and the emitter of this transistor VT1 is also connected with the FB pin of LED control chip U1.
5. a kind of LED high-power drive circuit according to claim 4, it is characterized in that, described power amplification circuit comprises: positive pole is connected with the output of resistance R 8, the power amplifier PA2 of negative pole ground connection after resistance R 7, negative pole is connected with the output of capacitor C 4 with resistance R 4 after diode D8, the power amplifier PA1 of positive pole ground connection after resistance R 11, be serially connected in negative pole and the resistance R between output 9 of power amplifier PA2, and the negative pole and 10 compositions of the resistance R between output that are serially connected in power amplifier PA1; And the negative pole of power amplifier PA1 is also connected with the collector electrode of transistor VT1.
6. according to a kind of LED high-power drive circuit described in claim 1～5 any one, it is characterized in that, described LED control chip U1 selects NCP1652 cake core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313777.3A CN104168692B (en) | 2014-07-03 | 2014-07-03 | A kind of LED high-power drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313777.3A CN104168692B (en) | 2014-07-03 | 2014-07-03 | A kind of LED high-power drive circuit |
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| CN104168692A true CN104168692A (en) | 2014-11-26 |
| CN104168692B CN104168692B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410313777.3A Expired - Fee Related CN104168692B (en) | 2014-07-03 | 2014-07-03 | A kind of LED high-power drive circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775988Y (en) * | 2005-02-28 | 2006-04-26 | 何持今 | Packaged integrated circuit high power LED driver |
| CN101827488A (en) * | 2010-03-03 | 2010-09-08 | 海洋王照明科技股份有限公司 | Fluorescent lamp electronic ballast and lighting device |
| CN101868094A (en) * | 2010-06-22 | 2010-10-20 | 海洋王照明科技股份有限公司 | LED driving circuit and LED lamp |
| CN203289699U (en) * | 2013-05-08 | 2013-11-13 | 高怡达科技(深圳)有限公司 | LED (light-emitting diode) high-power drive circuit |
| CN203327340U (en) * | 2013-07-23 | 2013-12-04 | 李国勇 | Efficient LED driving power supply and LED light source with same |
| CN103687148A (en) * | 2012-09-18 | 2014-03-26 | 株式会社理光 | Led drive circuit |
| CN204031534U (en) * | 2014-07-03 | 2014-12-17 | 宁波摩米创新工场电子科技有限公司 | A kind of LED high-power drive circuit |
-
2014
- 2014-07-03 CN CN201410313777.3A patent/CN104168692B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775988Y (en) * | 2005-02-28 | 2006-04-26 | 何持今 | Packaged integrated circuit high power LED driver |
| CN101827488A (en) * | 2010-03-03 | 2010-09-08 | 海洋王照明科技股份有限公司 | Fluorescent lamp electronic ballast and lighting device |
| CN101868094A (en) * | 2010-06-22 | 2010-10-20 | 海洋王照明科技股份有限公司 | LED driving circuit and LED lamp |
| CN103687148A (en) * | 2012-09-18 | 2014-03-26 | 株式会社理光 | Led drive circuit |
| CN203289699U (en) * | 2013-05-08 | 2013-11-13 | 高怡达科技(深圳)有限公司 | LED (light-emitting diode) high-power drive circuit |
| CN203327340U (en) * | 2013-07-23 | 2013-12-04 | 李国勇 | Efficient LED driving power supply and LED light source with same |
| CN204031534U (en) * | 2014-07-03 | 2014-12-17 | 宁波摩米创新工场电子科技有限公司 | A kind of LED high-power drive circuit |
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| CN104168692B (en) | 2016-08-24 |
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