CN103517495A - High-power LED street lamp driving power supply - Google Patents
High-power LED street lamp driving power supply Download PDFInfo
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- CN103517495A CN103517495A CN201210206858.4A CN201210206858A CN103517495A CN 103517495 A CN103517495 A CN 103517495A CN 201210206858 A CN201210206858 A CN 201210206858A CN 103517495 A CN103517495 A CN 103517495A
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- power supply
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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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
Abstract
The invention belongs to the technical field of LED driving and relates to a high-power LED constant current driving power supply including a circuit board and magnetic devices. In the circuit design, an SSL1750T chip is applied as the core to construct a PFC circuit and a flyback circuit, and constant current output with a high power factor, high efficiency and low noise is realized; in the PCB structure design, devices of a control circuit with SSL1750T as the core are all disposed on a control plate with the size of 38mm*18.5mm, and all the devices are patch devices; a power device and the circuit portion related to high voltage are arranged on a power supply motherboard with the size of 177mm*46mm, and all the patch devices are on the back; and the control plate is vertically inserted in the motherboard through a pin header, and the size of the whole power supply is 177mm*46mm*30mm (without being packaged in a housing). With the design, the size of the power supply is reduced, and a high power density is realized. Two main magnetic elements, namely a PFC inductor and a main transformer, are specially designed so as to satisfy the requirements of the structural size a PCB and the technical index of a power supply circuit.
Description
Technical field
The invention belongs to LED Driving technique field, in particular to a kind of LED constant current driving switch power supply.
Background technology
Development and maturation along with LED manufacturing technology, and the progressively decline of production cost, LED light source has started to be widely used in the fields such as auto lamp, special lighting light fixture, public illumination, has huge development potentiality, is considered to 21 century light source most with prospects.
According to the characteristic of LED, LED light fixture is substantially all to adopt constant-current source as driving power at present.With respect to other semiconductor luminaires, LED street lamp belongs to high-power illumination light fixture, conventionally by many power LEDs, is in series or in parallel to form the light source of light fixture, by the power drives of civil power input constant current output, is mainly used in road traffic illumination.The application characteristic of LED street lamp requires its driving power to have higher power factor, high efficiency, high reliability, long-life, and constant-current characteristics is good, can accomplish low cost simultaneously, and convenient maintenance and replacement.
Be applied on the market at present the constant-current supply that LED street lamp drives, be all with APFC, power factor is all more than 0.9; Complete machine power is substantially all more than 85%, but power volume is larger, and power density is not very high.
LED street lamp constant-current driving power supply involved in the present invention, compares and has less volume, higher power density with Same Efficieney power supply of the same type on the market.APFC adopts " permanent ON time " control model, and full input voltage range and full-load range internal power factor are more than 0.95; Adopt the conducting of Liao“ the lowest point " and " quasi-resonance " PWM control technology circuit of reversed excitation, maximum output voltage can reach 250V, and overall efficiency representative value reaches more than 90%; High efficiency design has realized complete machine low-temperature-rise, has particularly adopted long life electrolysis electric capacity to realize machine life more than 5 years in conjunction with long-life parts selection simultaneously; To the pure closed-loop control of output average current and the design of high heat capacity current sampling resistor, make power supply there is good constant current output characteristic and temperature stability.
Summary of the invention
The present invention is directed to the applicable cases of driving power supply for high-power LED street lamp, a kind of high power density, High Power Factor, high efficiency, long-life high power LED constant have been designed, this power supply has wide input voltage range: 90Vac～264Vac, constant-current characteristics is good, voltage regulation and load regulation are little, the advantages such as temperature stability is good, and reliability is high, and volume is little.Technical scheme of the present invention is as follows:
In circuit design, the SSL1750T type pwm chip of YiNXP company is that core is built circuit of reversed excitation, by suitable flyback transformer parameter designing, in conjunction with " valley conduct " function of SSL1750T, make circuit of reversed excitation be operated in non-fixed quasi-resonant mode frequently.By suitable BOOST inductance parameters, design, in conjunction with the PFC control circuit of SSL1750T, realize the Active Power Factor Correction in wide input voltage range.On control circuit, adopt the closed-loop control of output average current, realize the constant current of output current and control; Current mode PWM control has realized primary current peak value and has limited by week; Adopt the former limit auxiliary power supply winding of main transformer to make secondary output voltage feedback, realize the unloaded voltage-limiting protection of constant-current source.
In PCB structural design, in order to dwindle power volume, realize high power density, by take the device of the control circuit that SSL1750T is core, be all placed on above the control board that PCB is of a size of 38mm * 18.5mm, and all adopt the two-sided fabric swatch of SMD components; Power device and the circuit part that relates to high pressure are arranged on the power supply mainboard that PCB is of a size of 177mm * 46mm, mainboard double-sided wiring, surface-mounted device is all overleaf; Mainboard adopts row's pin to be vertically connected with control board; Whole power supply bare board is of a size of: L * W * H=177mm * 46mm * 30mm, peak power output 90W, maximum output voltage 250V, output-current rating 350mA.
Accompanying drawing explanation
Fig. 1 is driving power supply for high-power LED street lamp motherboard circuit schematic diagram of the present invention;
Fig. 2 is driving power supply for high-power LED street lamp mainboard PCB design drawing of the present invention;
Fig. 3 is driving power supply for high-power LED street lamp control board circuit theory diagrams of the present invention;
Fig. 4 is driving power supply for high-power LED street lamp control board PCB design drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, from circuit and structure, the specific embodiment of the present invention is described.
Circuit theory diagrams of the present invention are as shown in Figure 1 and Figure 2: the SSL1750T chip of take is built pfc circuit and circuit of reversed excitation as core, realize high voltage and constant current output.Fuse F1 and thermistor RT1 are used for realizing short-circuit protection and restriction inrush current; X capacitor C X1 and common mode inductance LF1, LF2 form input filter and are used for improving product E MC performance.Rectifier bridge selects the bridge heap of 600V/8A for BD1, to meet maximum 264V AC-input voltage, and the naturally cold design of 90W power output.Exchange input and by one-level BOOST circuit, boosted to 400V direct voltage output after rectifier bridge rectification, this circuit completes the PFC function of input simultaneously.As shown in Figures 1 and 3, pfc circuit is mainly by inductance L 2, metal-oxide-semiconductor Q1, and rectifier diode D1, the PFC control circuit of Support Capacitor C5, C6 and SSL1750T forms.Wherein L2 is BOOST inductance, and its auxiliary winding is for inductive current zero passage detection, and zero passage detection signal is input to 8 pin of SSL1750T chip, thereby realize, conducting PWM in discontinuous current the lowest point controls or quasi-resonance is controlled.Pfc circuit adopts current-mode control, current sampling resistor R11 realizes inductive current and detects, by R10, C2 capacitance-resistance parallel network is connected to PFC current detecting pin 11 pin (as shown in Figure 3), realizes the Cycle by Cycle restriction of BOOST circuit soft start and inductive current peak simultaneously.The output of pfc circuit is as the input of inverse-excitation type main power circuit, and final electric energy is exported to load by anti exciting converter.Circuit of reversed excitation is mainly by flyback transformer T1, main power MOS pipe Q2, and rectifier diode D2, D3, output Support Capacitor C12 forms, as shown in Figure 1.The auxiliary winding (pin5～pin6) in flyback transformer T1You Yuan limit winding (pin1～pin3) ，Yuan limit and secondary winding (pin7～pin12) form, and its former secondary winding turns ratio is designed to: 36 ∶54，Yuan limit inductance values are designed to 800uH.Former limit winding is got centre cap (pin2) with the turn ratio at 24: 21, by the HV pin (16 pin) of resistance R 19 access SSL1750T, the lowest point of realizing Q2 pipe drain-source voltage detect and during circuit start for chip provides starting resistor (Fig. 3).The auxiliary winding in former limit is as accessory power supply by rectifier diode D4, and Support Capacitor C9Wei Yuan limit chip provides supply power voltage, provides flyback transformer magnetic reset detection signal to chip 4 pin as auxiliary winding simultaneously.Secondary winding is got centre cap (pin9) with the turn ratio at 50: 4, and isolating the auxiliary winding (pin7～pin9) of secondary is secondary chip power supply with rectifier diode D5, Support Capacitor C10 formation secondary accessory power supply.Circuit of reversed excitation adopts current mode PWM to control, primary current sample resistance is R17, realizes current detecting, passes through R5, C1 capacitance-resistance parallel network is connected to flyback converter and detects pin 10 pin (Fig. 3), realizes the Cycle by Cycle restriction of circuit of reversed excitation soft start and current peak simultaneously.The overall control of circuit of reversed excitation is to adopt detection output average current to carry out direct closed-loop control, to realize output constant current, controls.By LM358 amplifier, form current error amplifier, as the U2 in Fig. 1, error feedback signal is input to SSL1750T feedback signal input pin (3 pin) after isolating by light lotus root (U1) forms closed-loop control (Fig. 3).The reference voltage generating circuit that reference voltage chip TL431 forms provides reference voltage for error amplifier.
As shown in Figure 2 and Figure 4, main power amplifier board is designed and sized to 177mm * 46mm rectangle in PCB design of the present invention; Control board is designed and sized to 38mm * 18.5mm rectangle, and control board is vertically inserted on mainboard by row's pin, and power source integral is of a size of 177mm * 46mm * 30mm (not casing).Mainboard adopts to insert to paste and loads in mixture two-sided fabric swatch, and plug-in mounting device is all placed on PCB front, and surface mount elements is all arranged in the PCB back side; Control board all adopts the two-sided fabric swatch of surface-mounted device.
Claims (5)
1. a driving power supply for high-power LED street lamp, is characterized in that with SSL1750T chip, for control core designs active PFC circuit and circuit of reversed excitation, pcb board layout and magnetic element having been carried out to specialized designs, realizes High Power Factor, high efficiency, high power density.
2. according to driving power supply for high-power LED street lamp claimed in claim 1, it is characterized in that, board design is mainboard and two PCB of control board, circuit is divided into two parts, the control circuit element that the SSL1750T chip of wherein take is caryogram is all arranged on control board, relates to high-tension components and parts and power device and is all arranged in above mainboard.
3. according to driving power supply for high-power LED street lamp claimed in claim 1, it is characterized in that, power supply mainboard PCB is designed and sized to 177mm * 46mm rectangle; Control board PCB is designed and sized to 38mm * 18.5mm rectangle, and control board is vertically inserted on mainboard by row's pin, and making power supply bare board overall dimensions is 177mm * 46mm * 30mm.
4. according to driving power supply for high-power LED street lamp claimed in claim 1, it is characterized in that, mainboard adopts to insert to paste and loads in mixture two-sided fabric swatch, and plug-in mounting device is all placed on PCB front, and surface mount elements is all arranged in the PCB back side; Control board all adopts surface-mounted device, two-sided fabric swatch.
5. according to driving power supply for high-power LED street lamp claimed in claim 1, it is characterized in that, PFC inductance adopts RM10 type ferrite magnetic core, vertical-type skeleton, umber of turn is 88 circles, adopt two φ 0.4 enamelled wires and around, inductance value is 700uH, detecting winding is 4 circles, adopts single φ 0.2 enamelled wire coiling; Its flyback transformer adopts PQ32/20 type ferrite magnetic core, and input winding, auxiliary winding and output umber of turn ratio are 36: 6: 54, and input winding electric sensibility reciprocal is 800uH.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210206858.4A CN103517495A (en) | 2012-06-21 | 2012-06-21 | High-power LED street lamp driving power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210206858.4A CN103517495A (en) | 2012-06-21 | 2012-06-21 | High-power LED street lamp driving power supply |
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| CN103517495A true CN103517495A (en) | 2014-01-15 |
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| CN201210206858.4A Pending CN103517495A (en) | 2012-06-21 | 2012-06-21 | High-power LED street lamp driving power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228292A (en) * | 2014-07-02 | 2016-01-06 | 天津工大海宇照明部品有限公司 | A kind of LED constant current driving power |
| CN105262333A (en) * | 2015-12-02 | 2016-01-20 | 成都启臣微电子有限公司 | Quasi-resonance fly-back type controller and control method |
| CN106356179A (en) * | 2016-09-05 | 2017-01-25 | 深圳创维－Rgb电子有限公司 | LLC transformer, LLC switching power source and electrical equipment |
| CN104184342B (en) * | 2014-07-23 | 2017-04-12 | 深圳市核达中远通电源技术有限公司 | Power supply framework integrating AC/DC and wide-input DC/DC designs |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201830527U (en) * | 2010-10-30 | 2011-05-11 | 陈金明 | High-power LED (light emitting diode) driving power supply |
| CN202068621U (en) * | 2011-04-22 | 2011-12-07 | 中山市诚创电器有限公司 | High power light emitting diode (LED) high efficiency driving power supply |
| CN202135357U (en) * | 2011-05-03 | 2012-02-01 | 天津工大海宇照明部品有限公司 | LED street lamp driving power supply |
-
2012
- 2012-06-21 CN CN201210206858.4A patent/CN103517495A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201830527U (en) * | 2010-10-30 | 2011-05-11 | 陈金明 | High-power LED (light emitting diode) driving power supply |
| CN202068621U (en) * | 2011-04-22 | 2011-12-07 | 中山市诚创电器有限公司 | High power light emitting diode (LED) high efficiency driving power supply |
| CN202135357U (en) * | 2011-05-03 | 2012-02-01 | 天津工大海宇照明部品有限公司 | LED street lamp driving power supply |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228292A (en) * | 2014-07-02 | 2016-01-06 | 天津工大海宇照明部品有限公司 | A kind of LED constant current driving power |
| CN104184342B (en) * | 2014-07-23 | 2017-04-12 | 深圳市核达中远通电源技术有限公司 | Power supply framework integrating AC/DC and wide-input DC/DC designs |
| CN105262333A (en) * | 2015-12-02 | 2016-01-20 | 成都启臣微电子有限公司 | Quasi-resonance fly-back type controller and control method |
| CN105262333B (en) * | 2015-12-02 | 2017-11-03 | 成都启臣微电子股份有限公司 | A kind of quasi-resonance flyback controller and control method |
| CN106356179A (en) * | 2016-09-05 | 2017-01-25 | 深圳创维－Rgb电子有限公司 | LLC transformer, LLC switching power source and electrical equipment |
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Application publication date: 20140115 |