CN202135357U - LED street lamp driving power supply - Google Patents
LED street lamp driving power supply Download PDFInfo
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- CN202135357U CN202135357U CN 201120135196 CN201120135196U CN202135357U CN 202135357 U CN202135357 U CN 202135357U CN 201120135196 CN201120135196 CN 201120135196 CN 201120135196 U CN201120135196 U CN 201120135196U CN 202135357 U CN202135357 U CN 202135357U
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- power supply
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- driving power
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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
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Abstract
The utility model belongs to the field of LED driving technology, and relates to a large power LED constant current driving power supply, including a circuit board and a magnetic device. 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, the devices of the control circuit with SSL1750T as the core are all disposed on a control plate with the size of 38mm*18.5mm, and all devices are paster devices; a power device and the circuit portion related to a high voltage are arranged on a power supply mainboard with the size of 177mm*46mm, and all paster devices are at the back surface; and the control plate is vertically inserted in the mainboard, and the size of the whole power supply is 177mm*46mm*30mm (without being packaged in a housing). With the design, the power supply volume is reduced, and a high power density is realized. Two main magnetic elements of a PFC inductor and a main transformer are specially designed, which satisfies the requirements of the PCB structure size and the power supply circuit technology index.
Description
Technical field
The utility model belongs to LED Driving technique field, in particular to a kind of LED constant-current driving Switching Power Supply.
Background technology
Continuous development and maturation along with the LED manufacturing technology; And the progressively decline of production cost; Led light source has begun to be widely used in fields such as auto lamp, special lighting light fixture, public illumination, and huge development potentiality is arranged, and is considered to the light source of tool development prospect of 21 century.
According to the characteristic of LED, the LED light fixture basically all is to adopt constant-current source as driving power at present.With respect to other semiconductor lighting equipment, the LED street lamp belongs to the high-power illumination light fixture, is in series or in parallel to form the light source of light fixture usually by many power LEDs, and the power drives by civil power input constant current output is mainly used in the 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 at present the constant-current supply that the LED street lamp drives on the market, all have the source power factor correcting circuit, power factor is all more than 0.9; Complete machine power is basically all more than 85%, but power volume is bigger, and power density is not very high.
The LED street lamp constant-current driving power supply that the utility model is related is compared with equal power power-supply of the same type on the market and to be had littler volume, higher power density.APFC adopts " permanent ON time " control model, and full input voltage range and full-load range internal power factor are more than 0.95; Adopted " the lowest point conducting " and " quasi-resonance " PWM control technology circuit of reversed excitation, maximum output voltage can reach 250V, and the overall efficiency representative value reaches more than 90%; The high efficiency design has realized that complete machine hangs down temperature rise, combines the long-life parts selection particularly to adopt long life electrolysis electric capacity to realize that machine life is more than 5 years simultaneously; Pure closed-loop control and the design of high heat capacity current sampling resistor to the output average current make power supply have good constant current output characteristic and temperature stability.
The utility model content
The utility model has designed a kind of high power density, High Power Factor, high efficiency, long-life great power LED constant-current driving power supply to the applicable cases of LED streetlamp driving power supply, and the technical scheme of the utility model is following:
A kind of LED streetlamp driving power supply is characterized in that with the SSL1750T chip be control core design active PFC circuit and circuit of reversed excitation, and board design is mainboard and two PCB of control board, with the circuit separated into two parts.With the SSL1750T chip is that the control core circuit element all is arranged on the control board, relates to high-tension components and parts and power device and all is arranged on the mainboard.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 vertically is inserted on the mainboard through row's pin, makes that power supply bare board overall dimensions is 177mm * 46mm * 30mm.Mainboard adopts to insert to paste and loads in mixture two-sided fabric swatch, and the plug-in mounting device all is placed on the PCB front, and surface mount elements all is arranged in the PCB back side; Control board all adopts the paster device, two-sided fabric swatch.The inductance of active PFC circuit adopts RM10 type ferrite magnetic core, and vertical skeleton, umber of turn are 88 circles, adopts two φ 0.4 enamelled wires and around, inductance value is 700uH, the detection winding is 4 circles, adopts single φ 0.2 enamelled wire coiling; Its anti-violent change depressor 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.Peak power output 90W, maximum output voltage 250V, output-current rating 350mA.
The beneficial effect of the utility model is: this power supply has wide input voltage range: 90Vac～264Vac, advantage such as constant-current characteristics is good, and voltage regulation and load regulation are little, and temperature stability is good, and reliability is high, and volume is little.
Description of drawings
Fig. 1 is the utility model LED streetlamp driving power supply motherboard circuit schematic diagram;
Fig. 2 is the utility model LED streetlamp driving power supply mainboard PCB design drawing;
Fig. 3 is the utility model LED streetlamp driving power supply control board circuit theory diagrams;
Fig. 4 is the utility model LED streetlamp driving power supply control board PCB design drawing.
Embodiment
Describe below in conjunction with accompanying drawing embodiment to the utility model on circuit and the structure.
The circuit theory diagrams of the utility model such as Fig. 1, shown in Figure 2: with the SSL1750T chip is that core is built pfc circuit and circuit of reversed excitation, realizes high voltage and constant current output.Fuse F1 and thermistor RT1 are used to realize that short-circuit protection and restriction start impulse current; X capacitor C X1 and common mode inductance LF1, LF2 form input filter and are used to improve product E MC performance.Rectifier bridge selects the bridge heap of BD1 with 600V/8A, to satisfy maximum 264V AC-input voltage, the cold naturally design of 90W power output.Boosted to the output of 400V direct voltage by one-level BOOST circuit after exchanging the rectification of input process rectifier bridge, this circuit is accomplished the PFC function of input simultaneously.Like Fig. 1 and shown in Figure 3, pfc circuit is mainly by inductance L 2, metal-oxide-semiconductor Q1, and rectifier diode D1, the PFC control circuit that supports capacitor C 5, C6 and SSL1750T constitutes.Wherein L2 is the BOOST inductance, and its auxiliary winding is used for the inductive current zero passage detection, and the zero passage detection signal is input to 8 pin of SSL1750T chip, thereby realizes discontinuous current the lowest point conducting PWM control or quasi-resonance control.Pfc circuit adopts current-mode control; Current sampling resistor R11 realizes that inductive current detects; Through 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 master power circuit, and final electric energy is exported to load through anti exciting converter.Circuit of reversed excitation is mainly by anti-violent change depressor T1, main power MOS pipe Q2, and rectifier diode D2, D3, output is supported capacitor C 12 and constituted, and is as shown in Figure 1.(pin1～pin3), winding is assisted on former limit, and (pin5～pin6) (pin7～pin12) constitute, its former secondary winding turns ratio is designed to: 36: 54, former limit inductance value was designed to 800uH to anti-violent change depressor T1 with the secondary winding by former limit winding.Former limit winding is got centre cap (pin2) with the turn ratio at 24: 21, through the HV pin (16 pin) of resistance R 19 access SSL1750T, is that chip provides starting resistor (Fig. 3) when the lowest point detection of realization Q2 pipe drain-source voltage and circuit start.The auxiliary winding in former limit, supports capacitor C 9 and for former limit chip supply power voltage is provided, simultaneously as assisting winding to provide anti-violent change depressor magnetic reset detection signal to chip 4 pin through rectifier diode D4 as accessory power supply.The secondary winding is got centre cap (pin9) with the turn ratio at 50: 4, and (pin7～pin9) and rectifier diode D5, supporting capacitor C 10, to constitute the secondary accessory power supplys be the secondary chip power supply to isolate the auxiliary winding of secondary.Circuit of reversed excitation adopts current mode PWM control; The primary current sample resistance is R17, realizes current detecting, 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 control.Constitute the current error amplifier by the LM358 amplifier, like the U2 among Fig. 1, the feedback signal input pin (3 pin) that is input to SSL1750T after error feedback signal is isolated through light lotus root (U1) constitutes closed-loop control (Fig. 3).The reference voltage generating circuit that reference voltage chip TL431 constitutes is that error amplifier provides reference voltage.
The PCB design of the utility model is like Fig. 2 and shown in Figure 4, and main power amplifier board is designed and sized to 177mm * 46mm rectangle; Control board is designed and sized to 38mm * 18.5mm rectangle, and control board vertically is inserted on the mainboard through 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 the plug-in mounting device all is placed on the PCB front, and surface mount elements all is arranged in the PCB back side; Control board all adopts the two-sided fabric swatch of paster device.
Claims (5)
1. a LED streetlamp driving power supply is characterized in that with the SSL1750T chip be control core design active PFC circuit and circuit of reversed excitation, and board design is mainboard and two PCB of control board, with the circuit separated into two parts.
2. LED streetlamp driving power supply according to claim 1 is characterized in that, is that the control core circuit element all is arranged on the control board with the SSL1750T chip, relates to high-tension components and parts and power device and all is arranged on the mainboard.
3. LED streetlamp driving power supply according to claim 1 is characterized in that, 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 vertically is inserted on the mainboard through row's pin, makes that power supply bare board overall dimensions is 177mm * 46mm * 30mm.
4. LED streetlamp driving power supply according to claim 1 is characterized in that, mainboard adopts to insert to paste and loads in mixture two-sided fabric swatch, and the plug-in mounting device all is placed on the PCB front, and surface mount elements all is arranged in the PCB back side; Control board all adopts the paster device, two-sided fabric swatch.
5. LED streetlamp driving power supply according to claim 1 is characterized in that, the inductance of active PFC circuit adopts RM10 type ferrite magnetic core; Vertical 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 anti-violent change depressor 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120135196 CN202135357U (en) | 2011-05-03 | 2011-05-03 | LED street lamp driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120135196 CN202135357U (en) | 2011-05-03 | 2011-05-03 | LED street lamp driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202135357U true CN202135357U (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120135196 Expired - Fee Related CN202135357U (en) | 2011-05-03 | 2011-05-03 | LED street lamp driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202135357U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103209541A (en) * | 2012-12-20 | 2013-07-17 | 上海显恒光电科技股份有限公司 | LED (light-emitting diode) driving circuit PCB (printed circuit board) |
| CN103517495A (en) * | 2012-06-21 | 2014-01-15 | 天津工大海宇照明部品有限公司 | High-power LED street lamp driving power supply |
-
2011
- 2011-05-03 CN CN 201120135196 patent/CN202135357U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517495A (en) * | 2012-06-21 | 2014-01-15 | 天津工大海宇照明部品有限公司 | High-power LED street lamp driving power supply |
| CN103209541A (en) * | 2012-12-20 | 2013-07-17 | 上海显恒光电科技股份有限公司 | LED (light-emitting diode) driving circuit PCB (printed circuit board) |
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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: 20120201 Termination date: 20140503 |