CN203243575U - High-power LED lighting driver - Google Patents
High-power LED lighting driver Download PDFInfo
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- CN203243575U CN203243575U CN 201320264366 CN201320264366U CN203243575U CN 203243575 U CN203243575 U CN 203243575U CN 201320264366 CN201320264366 CN 201320264366 CN 201320264366 U CN201320264366 U CN 201320264366U CN 203243575 U CN203243575 U CN 203243575U
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Abstract
The utility model discloses a high power LED lighting driver, this LED driver include circuit module such as EMI filtering, AC/DC conversion, PFC circuit, DC/DC conversion, driver chip, power extension, can drive 100 LED illumination lamps and lanterns to can realize electrodeless current regulation. The key device driver chip that this driver used adopts miniwatt driver chip, realizes the high power drive through power extension module, can realize the electrodeless dimming function of linearity of LED illumination lamps and lanterns moreover through electrodeless current regulating circuit, compares with prior art, the utility model has the characteristics of low-cost high efficiency and power temperature rise can save the radiator to effective extension system life-span.
Description
Technical field
The utility model relates to a kind of electric equipment device, particularly relates to the low-cost LED illumination driving circuit of a kind of high power.
Background technology
As lighting source of new generation, LED is little because of its energy consumption, luminous efficiency is high, and color rendering is good, and therefore environmentally safe is called as green light source.Directly drive different from incandescent lamp 220V alternating current, the use of LED need to the drive circuit of its coupling, at present, the LED illumination driving circuit generally adopts constant-current drive circuit, and need to consider the composite factors such as out-put supply quality and reduction cost, so one of problem that the led drive circuit of low-cost high-efficiency high reliability is the LED development need to be solved.
Summary of the invention
Purpose of the present invention is exactly the high-power LED driving circuit that a kind of low-cost high-efficiency high reliability is provided for the defective that overcomes above-mentioned prior art existence.
For solving the problems of the technologies described above, the present invention takes following measures to realize:
It is that lower powered PWM drives chip that the Primary Component that this driver adopts drives chip, the constant current output driving LED that realizes electric current by the power expansion circuit is luminous, during LED curent change (increase or reduce), by having the linear current value that collects variation without the modular circuit of electrode current regulatory function, after carrying out the current error amplification, be transferred to control circuit PWM chip, control circuit carries out anti-phase processing to sampled signal, output pulse width change (reduce or increase), the power tube of the output pulsed drive power expansion level of change width, so that output voltage changes (reduce or increase), can produce self adaptation adjustment (reduce or increase) so flow through the electric current of LED, this has just kept and has driven the current constant of high-capacity LED, and can carry out the linear electrodeless adjusting of LED electric current.Effective effect of the present utility model is: compared with prior art, the present invention has low-cost high-efficiency and the low characteristics of power supply temperature rise, can save radiator, and effectively prolongs lifetime of system.
Effective effect of the present utility model is: the utility model can realize that the illumination of 100W high-capacity LED drives, drive circuit radiator cost is more than 30%, power-efficient is more than 90%, can realize the linear electrodeless adjusting of LED drive current, this driver can be used for the fields such as street lamp, traffic lights, Landscape Lighting and Special Work illumination.
Description of drawings
Fig. 1 is a kind of high-capacity LED illumination driver of the utility model system configuration schematic diagram;
Fig. 2 is a kind of high-capacity LED illumination driver circuitry of the utility model schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model example is described in detail, thereby so that the advantage of utility model and feature are easy to be those skilled in the art will recognize that protection range of the present utility model is made more explicit defining.
See also Fig. 1, Fig. 2, the utility model embodiment has adopted low-power PWM chip PT4115 as LED high efficiency drive control chip.The basic index of PT4115 is: the highest 1.2A of output current (built-in power MOS FET); Efficient is up to 97%; Ultralow cut-off current; ± 5% output current precision; The LED open-circuit-protection; Simulation/PWM dimming function is selected, up to the PWM of the 5000:1 light ratio of withering; Inside is contained and is trembled frequently characteristic, can effectively improve EMI.The maximum output current of PT4115 only has 1.2A, the actual use generally is limited in the 10W, so be that a kind of low-power drives chip, for realizing 100 watts of high-power output drive currents, take output voltage 24V as example, then needing to export average current is 4-5A, so just can satisfy the demands, therefore add to it and join the power expansion module, among Fig. 2, the output of PT4115 can be realized the MOSFET (V8) of the power tube N-type of High-current output by one of anti-phase buffering rear drive, and V6 and V7 provide suitable grid voltage for V8, generally at 15-18V, V5 can make the output homophase of V8 and PT4115, N2, the totem-pote circuit that N3 forms is in order to increase the driving force of V8, R7, V10 is for improving the waveform of V8, promote its switching characteristic, reduce power consumption; The CS end of PT4115 is current feedback terminal, and R9 is 0 ~ 100 kilo-ohm of potentiometer, and R10 is 300 ohm, and R3 is 20 ohm, and R3, R9 and R10 consist of electrodeless current regulating module, can realize the electrodeless linear regulation of LED drive current.Through actual measurement, the exportable electric current of this driver reaches 4A, efficient reaches more than 90%, continuous operation is 4 hours under 25 degrees centigrade of room temperatures, the temperature that does not need additionally to consider MOSFET pipe in the situation of cooling measure only has 35 degrees centigrade, be lower than the temperature of other high power drivers MOSFET pipe, performance index meet the standard criterion requirement.This driver can be used for the fields such as street lamp, traffic lights, Landscape Lighting and Special Work illumination.
Claims (2)
1. high-capacity LED illumination driver, it is characterized in that: it is that lower powered PWM drives chip that the Primary Component that this driver adopts drives chip, the constant current output driving LED that realizes electric current by the power expansion circuit is luminous, during LED curent change (increase or reduce), by having the linear current value that collects variation without the modular circuit of electrode current regulatory function, after carrying out the current error amplification, be transferred to control circuit PWM chip, control circuit carries out anti-phase processing to sampled signal, output pulse width change (reduce or increase), the power tube of the output pulsed drive power expansion level of change width, so that output voltage changes (reduce or increase), can produce self adaptation adjustment (reduce or increase) so flow through the electric current of LED, this has just kept and has driven the current constant of high-capacity LED, and can carry out the linear electrodeless adjusting of LED electric current.
2. high-capacity LED illumination driver according to claim 1, it is characterized in that: this driver adopts small-power to drive chip, and can realize regulating without electrode current, by external power expansion circuit, realize the driving of 100 watts of high power LED lighting lamps, compared with prior art, the present invention has low-cost high-efficiency and the low characteristics of power supply temperature rise, can save radiator, and effectively prolong lifetime of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264366 CN203243575U (en) | 2013-05-16 | 2013-05-16 | High-power LED lighting driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264366 CN203243575U (en) | 2013-05-16 | 2013-05-16 | High-power LED lighting driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243575U true CN203243575U (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320264366 Expired - Fee Related CN203243575U (en) | 2013-05-16 | 2013-05-16 | High-power LED lighting driver |
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| Country | Link |
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| CN (1) | CN203243575U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103619093A (en) * | 2013-10-29 | 2014-03-05 | 汤志新 | A LED integrated light source |
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2013
- 2013-05-16 CN CN 201320264366 patent/CN203243575U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103619093A (en) * | 2013-10-29 | 2014-03-05 | 汤志新 | A LED integrated light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140516 |