CN201550318U - Digitized high-performance LED drive power supply - Google Patents
Digitized high-performance LED drive power supply Download PDFInfo
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- CN201550318U CN201550318U CN2009200596940U CN200920059694U CN201550318U CN 201550318 U CN201550318 U CN 201550318U CN 2009200596940 U CN2009200596940 U CN 2009200596940U CN 200920059694 U CN200920059694 U CN 200920059694U CN 201550318 U CN201550318 U CN 201550318U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model relates to the technical field of LED (Light Emitting Diode) drive power supplies, in particular to a digitized high-performance LED drive power supply, which comprises an input circuit, an EMI (Electro-Magnetic Interference) filter circuit, a rectification filter circuit, a power factor correcting circuit, a half-bridge power converter, a constant-current output circuit, an LED load circuit, a singlechip control system, a pulse width modulation circuit, a protection circuit and a sampling circuit; the digitized high-performance LED drive power supply realizes the real-time digital control by utilizing the singlechip control system, can realize rapid and flexible control design, leads the performance of a switching power supply to be better, improves the transient response performance of the circuit, and has the advantages of higher speed, higher accuracy and stronger reliability; in addition, the digital control can realize precise non-linear algorithm, a distributed power supply system comprising a plurality of components can be monitored, and the dynamism and the conversion rate of the LED drive power supply are improved.
Description
Technical field:
The utility model relates to LED driving power technical field, relates in particular to a kind of high performance digitlization LED driving power.
Background technology:
No matter be powerful or low power LED lighting, generally all constitute by several parts of power supply, led driver, LED, lens and substrate, wherein Guan Jian element is a led driver, and it must provide the output of a constant current output or constant pressure and flow, could guarantee that the light that LED sends is stable.Along with the development of power electronic technology, what most of LED driving powers adopted is analog power trim control circuit, but most of client is more and more higher to the requirement of controller, and the digitlization of Switching Power Supply and intellectuality also will become the development in future direction.At present, the high power switching power supply of China traditional analog control mode, circuit complexity, the poor reliability of adopting more.Therefore, people press for and adopt integrated level height, the powerful digitial controller design Switching Power Supply of integrated functionality, adapt to the Switching Power Supply that improves constantly and export requirements such as control able to programme, data communication, intelligent control.
The utility model content:
Thereby the purpose of this utility model is exactly the high-performance digitlization LED driving power that provides a kind of dynamic that adopts single-chip microcomputer control technology and the integrated control chip of corresponding special use to control raising LED driving power at the deficiency of prior art existence, simplified circuit, its energy-conserving and environment-protective, efficient height, power factor height meet domestic, international standard.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of high performance digitlization LED driving power, it includes input circuit, EMI filter circuit, current rectifying and wave filtering circuit, the circuit of power factor correction that connects successively, half-bridge power converter, constant current output circuit, the LED load circuit that is used for dc voltage conversion is become high-frequency ac voltage, it also includes single-chip computer control system, pulse-width modulation circuit, can carry out the protective circuit of fault self-diagnosis and LED load circuit output current and voltage are carried out the sample circuit of data sampling, and single-chip computer control system has D/A modular converter and A/D modular converter;
The D/A modular converter of described single-chip computer control system is connected with the input of pulse-width modulation circuit, the input of circuit of power factor correction respectively, and the output of pulse-width modulation circuit is connected with the input of half-bridge power converter;
The A/D modular converter of described single-chip computer control system is connected with the input of sample circuit, the input of protective circuit respectively, and the input of sample circuit and protective circuit is connected with the output of LED load circuit respectively.
It comprises that also promising single-chip computer control system and pulse-width modulation circuit provide the accessory power supply of working power, and the input of accessory power supply is connected with the output of EMI filter circuit, and its output is connected with single-chip computer control system.
The single-chip microcomputer model that described single-chip computer control system adopts is PIC16F874.
Described input circuit input 220V/50Hz alternating current is connected with two-way moment surge suppressor, fuse fast in its circuit.
Described EMI filter circuit is made up of multistage differential mode, common mode LC filtering networking.
The control chip model that described circuit of power factor correction adopts is UC3854A/B.
The chip for driving model that described half-bridge power converter adopts is IR2304.
It is the current-mode control chip of UC3846 or NCP1200 that described pulse-width modulation circuit adopts model.
The A/D modular converter of described single-chip computer control system is connected with the RS232 interface that can send sound and light alarm, and it is that the chip of MAX232 is as transceiver that the RS232 interface adopts model.
Described LED load circuit is the circuit of being made up of led light source series, parallel or series-parallel connection.
The utility model beneficial effect is:
The utility model includes input circuit; the EMI filter circuit; current rectifying and wave filtering circuit; circuit of power factor correction; half-bridge power converter; constant current output circuit; the LED load circuit; single-chip computer control system; pulse-width modulation circuit; protective circuit and sample circuit; the D/A modular converter of single-chip computer control system respectively with the input of pulse-width modulation circuit; the input of circuit of power factor correction connects; the output of pulse-width modulation circuit is connected with the input of half-bridge power converter; the utility model utilizes single-chip computer control system to carry out real-time digital control; can realize fast; controlling Design flexibly; make the performance of Switching Power Supply better; improved the transient response performance of circuit; it is faster to make it speed; precision is higher, and reliability is stronger.Digital controlly can realize meticulous nonlinear algorithm, monitor multipart distribution power system, improve LED driving power dynamic and transfer ratio.Digital control method has following advantage: 1) adjust Control Parameter by software, such as, gain and bandwidth, thus make system debug more convenient; 2) a large amount of controlling Design realize by single-chip microcomputer, and are difficult to realize with analog controller; 3) in side circuit, use the digital control quantity that can reduce components and parts, thereby reduce the cost of material and assembling; 4) digital processing of single-chip microcomputer inside can not be subjected to the influence of circuit noise, has avoided distortion, distortion in the analog signal transmittance process, thereby control is reliable; 5) if network service and power supply software debugging technology are combined, can realize remote sensing, remote measurement, remote regulating.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described, see shown in Figure 1, a kind of high performance digital LED driving power, include the input circuit 1 that connects successively, EMI filter circuit 2, current rectifying and wave filtering circuit 3, circuit of power factor correction 4, be used for dc voltage conversion is become the half-bridge power converter 5 of high-frequency ac voltage, constant current output circuit 6, LED load circuit 7, it also includes single-chip computer control system 8, RS232 interface 13, pulse-width modulation circuit 9, can carry out the protective circuit 10 of fault self-diagnosis and LED load circuit 7 output currents and voltage are carried out the sample circuit 11 of data sampling, single-chip computer control system 8 has D/A modular converter 81 and A/D modular converter 82; The D/A modular converter 81 of single-chip computer control system 8 is connected with the input of pulse-width modulation circuit 9, the input of circuit of power factor correction 4 respectively, and the output of pulse-width modulation circuit 9 is connected with the input of half-bridge power converter 5; The A/D modular converter 82 of single-chip computer control system 8 is connected with the input of sample circuit 11, the input of protective circuit 10 respectively, and the input of sample circuit 11 and protective circuit 10 is connected with the output of LED load circuit 7 respectively.
Single-chip computer control system 8 of the present utility model serves as the control core with high-performance single-chip microcomputer PIC16F874, form data processing circuit, under Detection ﹠ Controling software is supported, by switch power supply output current, voltage being carried out data sampling and comparing to given data, thereby the operating state of adjustment and control switch power tube, monitor the output current size simultaneously, carry out Current Control.The operation principle of its circuit is: obtain high voltage direct current behind input circuit 1 output 220V alternating voltage process EMI filtering, rectifying and wave-filtering and the power factor correction PFC (Power Factor Correct), high direct voltage is added on the half-bridge power converter 5, half-bridge power converter 5 is under the control of pulse-width modulation circuit 9 and single-chip computer control system 8, coupling by half-bridge power converter 5 and buffer action can obtain stable average anode current at the secondary quasi-square wave voltage that obtains after the rectifying and wave-filtering FEEDBACK CONTROL; Single-chip computer control system 8 carries out data sampling to switch power source output voltage and electric current automatically by sample circuit 11, and compare to given data with the user, adjust circuit according to the adjustment algorithm control switch that is provided with then, make electric power output voltage meet set-point.Single-chip computer control system 8 is also wanted the output current of testing circuit when adjusting electric power output voltage, when output current surpasses set-point, just start protective circuit 10, realizes defencive function.For make intelligent switch power source can be reliably, work safely, native system is provided with multiple monitoring and protection system, mainly comprises overcurrent protection, short-circuit protection, overheat protector.Single-chip computer control system 8 is by the output current of current sensor senses switching power tube, when electric current surpasses set-point, single-chip computer control system 8 cuts off the switch-actuated signal, also can send sound and light alarm to Surveillance center, and LED load circuit 7 working conditions are implemented to detect by RS232 interface 13.
Described input circuit 1 input 220V/50Hz alternating current has two-way moment surge suppressor, fuse fast in its circuit.
Described EMI filter circuit 2 is made up of multistage differential mode, common mode LC filtering networking, and the various interference signals that filtering is come in by electrical network prevent from that high frequency that power switch circuit forms from disturbing to scurry electrical network.
Described current rectifying and wave filtering circuit 3 becomes the 220V alternating current into direct voltage by bridge rectifier (AC/DC conversion), again by the direct current LC filtering networking peak value of suppressor pulse electric current effectively, disturb thereby reduce current harmonics, and provide direct voltage for half-bridge power converter 5.
Described accessory power supply 12 provides working power for single-chip computer control system 8 and pulse-width modulation circuit 9.
Described circuit of power factor correction 4 adopts UC3854A/B control chip (enhancement mode High Power Factor voltage pre regulator) composition circuit of power factor correction 4 to improve power factor, not through power factor correction power-supply device before, its power factor generally has only 0.4～0.6, can reach 0.98 after calibrated.
Described half-bridge power converter 5 is key components of Switching Power Supply, adopt new type of IR 2304 as chip for driving, under the control of pulse-width modulation circuit 9 and single-chip computer control system 8, it becomes high-frequency ac voltage to dc voltage conversion, and plays the effect that output and input electrical network are isolated.
Described single-chip computer control system 8 serves as the control core with high-performance single-chip microcomputer PIC16F874; form data processing circuit; under Detection ﹠ Controling software is supported; control system is by conducting and the turn-off time of I/O input port through the switch of D/A modular converter 81 power controlling conversion; finish stablizing to output current; finish sampling by A/D modular converter 82, realized defencive functions such as excess temperature, overvoltage, overcurrent protection and current limliting by systems soft ware switch power source output voltage and electric current.The Control Software of single-chip computer control system 8 mainly comprises key switch scanning imaging system, fault distinguishing subprogram, all fills and floating charge subprogram (the words will delete), interrupts detecting subprogram and communicator program etc., mainly finish to signal sampling various data processing and to the controlled function of power transfer part.
Preferably, the PIC16F874 that single-chip computer control system 8 adopts is 8 single-chip microcomputers, Flash, the RAM of 128 bytes of built-in 4K * 14 and the EEPROM of 64 bytes.Its built-in 1 UART module can supply serial communication usefulness, the pwm signal of 10 bit resolutions, 8 tunnel 10 A/D ALT-CH alternate channel.
Described pulse-width modulation circuit 9 adopts current-mode control chip UC3846 or NCP1200 to form Waveform generating circuit, under the control of single-chip computer control system 8, the pulsewidth of adjusting output pulse width modulation circuit 9 is controlled the turn-on and turn-off time of field effect transistor (CMOS) or IGBT, thereby reach the purpose of stablizing output current value, also have soft start function.
Described protective circuit 10 can be carried out fault self-diagnosis, and power is partly realized automatic monitoring; When, overvoltage too high when the Switching Power Supply occurrence temperature, overcurrent short circuit, protective circuit 10 quits work with protection load and power supply itself Switching Power Supply.
Described constant current output circuit 6 is with the high-frequency ac voltage rectifying and wave-filtering of half-bridge power converter 5 outputs, and the constant DC that needing to obtain through the electric current and voltage reforming unit flows again, also prevents the interference of high-frequency noise to LED load circuit 7 simultaneously.
Described sample circuit 11 is gathered and is respectively exported electrical quantity and temperature parameter output error, isolates being transferred to A/D modular converter 82 by light, passes through microprocessor logic analysis, judgement again, sends corresponding instruction.
Described LED load circuit 7 is the circuit of being made up of led light source series, parallel, series-parallel connection.
Described RS232 interface 13 is serial communication interface circuit, adopts the MAX232 chip as the RS232 transceiver.
Claims (9)
1. high performance digitlization LED driving power, it is characterized in that: it includes the input circuit (1) that connects successively, EMI filter circuit (2), current rectifying and wave filtering circuit (3), circuit of power factor correction (4), be used for dc voltage conversion is become the half-bridge power converter (5) of high-frequency ac voltage, constant current output circuit (6), LED load circuit (7), it also includes single-chip computer control system (8), pulse-width modulation circuit (9), can carry out the protective circuit (10) of fault self-diagnosis and LED load circuit (7) output current and voltage are carried out the sample circuit (11) of data sampling, wherein single-chip computer control system (8) has D/A modular converter (81) and A/D modular converter (82);
The D/A modular converter (81) of described single-chip computer control system (8) is connected with the input of pulse-width modulation circuit (9), the input of circuit of power factor correction (4) respectively, and the output of pulse-width modulation circuit (9) is connected with the input of half-bridge power converter (5);
The A/D modular converter (82) of described single-chip computer control system (8) is connected with the input of sample circuit (11), the input of protective circuit (10) respectively, and the input of sample circuit (11) and protective circuit (10) is connected with the output of LED load circuit (7) respectively.
2. a kind of high performance digitlization LED driving power according to claim 1, it is characterized in that: it comprises that also promising single-chip computer control system (8) and pulse-width modulation circuit (9) provide the accessory power supply (12) of working power, the input of accessory power supply (12) is connected with the output of EMI filter circuit (2), and its output is connected with single-chip computer control system (8).
3. a kind of high performance digitlization LED driving power according to claim 1 is characterized in that: the single-chip microcomputer model that described single-chip computer control system (8) adopts is PIC16F874.
4. a kind of high performance digitlization LED driving power according to claim 1 is characterized in that: described input circuit (1) input 220V/50Hz alternating current is connected with two-way moment surge suppressor, fuse fast in its circuit.
5. a kind of high performance digitlization LED driving power according to claim 1, it is characterized in that: described EMI filter circuit (2) is made up of multistage differential mode, common mode LC filtering networking.
6. a kind of high performance digitlization LED driving power according to claim 1 is characterized in that: the control chip model that described circuit of power factor correction (4) adopts is UC3854A/B.
7. a kind of high performance digitlization LED driving power according to claim 1 is characterized in that: the chip for driving model that described half-bridge power converter (5) adopts is IR2304.
8. a kind of high performance digitlization LED driving power according to claim 1 is characterized in that: it is the current-mode control chip of UC3846 or NCP1200 that described pulse-width modulation circuit (9) adopts model.
9. a kind of high performance digitlization LED driving power according to claim 1, it is characterized in that: the A/D modular converter (82) of described single-chip computer control system (8) is connected with the RS232 interface (13) that can send sound and light alarm, and it is that the chip of MAX232 is as transceiver that RS232 interface (13) adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200596940U CN201550318U (en) | 2009-07-03 | 2009-07-03 | Digitized high-performance LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200596940U CN201550318U (en) | 2009-07-03 | 2009-07-03 | Digitized high-performance LED drive power supply |
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| Publication Number | Publication Date |
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| CN201550318U true CN201550318U (en) | 2010-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200596940U Expired - Fee Related CN201550318U (en) | 2009-07-03 | 2009-07-03 | Digitized high-performance LED drive power supply |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045928A (en) * | 2010-12-18 | 2011-05-04 | 惠州大景照明控制有限公司 | LED (light-emitting diode) lamp power supply capable of dimming |
| CN102098850A (en) * | 2011-01-28 | 2011-06-15 | 南京博兰得电子科技有限公司 | LED (light emitting diode) power supply device |
| CN102438378A (en) * | 2011-12-20 | 2012-05-02 | 江苏宏微科技有限公司 | LED (Light Emitting Diode) illumination intelligent control system |
| CN102685968A (en) * | 2011-03-15 | 2012-09-19 | 克拉玛依地威诺节能有限责任公司 | Switching power supply having communication, data collection and dimming control functions and used for LED lamp |
| CN102685962A (en) * | 2011-03-07 | 2012-09-19 | 海洋王照明科技股份有限公司 | LED (light emitting diode) drive circuit |
| CN103475197A (en) * | 2013-09-10 | 2013-12-25 | 江苏银佳企业集团有限公司 | Digital switching power supply including feedback element and working method thereof |
| CN107347171A (en) * | 2017-08-25 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W（PFC）Power amplifier module |
| CN108712812A (en) * | 2018-06-04 | 2018-10-26 | 江阴万佳照明电器有限公司 | A kind of electrodeless lamp power supply driving circuit and control method |
| CN113923821A (en) * | 2021-10-27 | 2022-01-11 | 广州彩熠灯光股份有限公司 | Drive control method and circuit of LED lamp, computer equipment and storage medium |
-
2009
- 2009-07-03 CN CN2009200596940U patent/CN201550318U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045928A (en) * | 2010-12-18 | 2011-05-04 | 惠州大景照明控制有限公司 | LED (light-emitting diode) lamp power supply capable of dimming |
| CN102098850B (en) * | 2011-01-28 | 2015-02-18 | 南京博兰得电子科技有限公司 | LED (light emitting diode) power supply device |
| CN102098850A (en) * | 2011-01-28 | 2011-06-15 | 南京博兰得电子科技有限公司 | LED (light emitting diode) power supply device |
| CN102685962A (en) * | 2011-03-07 | 2012-09-19 | 海洋王照明科技股份有限公司 | LED (light emitting diode) drive circuit |
| CN102685968A (en) * | 2011-03-15 | 2012-09-19 | 克拉玛依地威诺节能有限责任公司 | Switching power supply having communication, data collection and dimming control functions and used for LED lamp |
| CN102438378A (en) * | 2011-12-20 | 2012-05-02 | 江苏宏微科技有限公司 | LED (Light Emitting Diode) illumination intelligent control system |
| CN102438378B (en) * | 2011-12-20 | 2013-10-30 | 江苏宏微科技有限公司 | LED (Light Emitting Diode) illumination intelligent control system |
| CN103475197A (en) * | 2013-09-10 | 2013-12-25 | 江苏银佳企业集团有限公司 | Digital switching power supply including feedback element and working method thereof |
| CN107347171A (en) * | 2017-08-25 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W（PFC）Power amplifier module |
| CN107347171B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 600W+150W (PFC) power amplifier module |
| CN108712812A (en) * | 2018-06-04 | 2018-10-26 | 江阴万佳照明电器有限公司 | A kind of electrodeless lamp power supply driving circuit and control method |
| CN108712812B (en) * | 2018-06-04 | 2024-02-06 | 江阴万佳照明电器有限公司 | Electrodeless lamp power supply driving circuit and control method |
| CN113923821A (en) * | 2021-10-27 | 2022-01-11 | 广州彩熠灯光股份有限公司 | Drive control method and circuit of LED lamp, computer equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20100811 Termination date: 20120703 |