CN101925232B - LED street lamp constant current control power supply - Google Patents
LED street lamp constant current control power supply Download PDFInfo
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- CN101925232B CN101925232B CN 201010251053 CN201010251053A CN101925232B CN 101925232 B CN101925232 B CN 101925232B CN 201010251053 CN201010251053 CN 201010251053 CN 201010251053 A CN201010251053 A CN 201010251053A CN 101925232 B CN101925232 B CN 101925232B
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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 invention discloses an LED street lamp constant current control power supply which belongs to a power supply circuit. A surge and peak voltage resistant circuit is connected with commercial power and then is connected with an EMC (Electro Magnetic Compatibility) filtering circuit, a full bridge rectification circuit, a PFC (Power Factor Correction) circuit and a voltage reducing and stabilizing circuit in sequence, wherein one end of the voltage reducing and stabilizing circuit is used for outputting, while the other end is connected with the an expanded-current constant-current circuit and a freewheel diode; the freewheel diode is connected with an energy storage inductance and then is output, moreover, the freewheel diode is also connected with the expanded-current constant-current circuit which is connected to a PWM (Pulse-Width Modulation) output circuit and a peak detection circuit; the PWM output circuit takes a main control chip U1 as a core, an DRV end is connected with the expanded-current constant-current circuit, a VDD end is connected with the voltage reducing and stabilizing circuit, a CS end is connected with a peak collecting circuit and an EN is connected with a photosensitive dimming circuit. The LED street lamp constant current control power supply has stable and reliable output, can be used in series connection as groups, and also has photosensitive dimming function for adjusting the brightness of a street lamp according to the illumination condition of the environment, thereby saving energy and prolonging service life very well.
Description
Technical field
The present invention relates to a kind of illuminating street lamp, particularly a kind of constant current control power supply circuit that is used for the driving LED street lamp.
Background technology
In the city, need on the road a large amount of street lamps is set, and in order to adapt to the needs of saves energy, the LED street lamp is widely used now.The LED street lamp is because of the advantage of its illuminator, has that energy consumption is low, the life-span long, energy-efficient characteristics.
The LED lamp is different from common incandescent lamp, and its normal operation needs the support of power circuit, so for the LED street lamp, constant-current supply belongs to core component, a well behaved constant-current supply is mixed high bright spot LED luminous tube, can save a large amount of electric energy.But the character of street lamp, determine that it also should have some special effects: power is large, illumination zone is wide, and control mode is flexible and changeable, long service life, not fragile or part have the leeway remedied when damaging etc.And the constant current control power supply of present LED street lamp all can not reach these effects.
Summary of the invention
For described these shortcomings of background technology, the objective of the invention is to invent a kind of energy-conservation, cheap, multi-functional, high reliability, be fit to the constant current control power supply of the high-power requirement of street lamp.
Control power circuit of the present invention is such: antisurge is connected civil power with the peak voltage circuit, then connect successively EMC filter circuit, full bridge rectifier, PFC correcting circuit and decompression voltage regulator, the output of decompression voltage regulator one end, the other end is connected with continued flow tube with expansion stream constant-current circuit, continued flow tube is exported after connecting energy storage inductor again, and continued flow tube also connects expansion stream constant-current circuit; Expand the stream constant-current circuit and be connected to PWM output circuit and peak detection circuit, the PWM output circuit is take main control chip U1 as core, expand the DRV port that the stream constant-current circuit is connected to main control chip, and power to main control chip with the vdd terminal mouth that the lowering and stabilizing blood pressure power supply circuits are snap-fit attachment to main control chip, the peak value Acquisition Circuit is connected to the CS port of main control chip, is connected with photosensitive light adjusting circuit on the EN port.The electric current of the constant voltage that output LED is required.
Described main control chip is 9910 chips.
Described expansion stream constant-current circuit is made of high pressure mos pipe and a low pressure mos pipe, fly-wheel diode and inductor rectifier, high-voltage tube at front, low-voltage tube in rear series connection, the centre is drawn circuit and is connected behind fly-wheel diode and the inductor rectifier again, be connected to the lowering and stabilizing blood pressure power supply circuits to main control chip U1 power supply, low-voltage tube output is connected on the DRV end of main control chip U1 of PWM output circuit and powers to main control chip.
Described photosensitive regulating circuit contains photosensitive tube, and photosensitive tube gets electric from the fly-wheel diode that expands the stream constant-current circuit, by the EN end of access main control chip behind the divider resistance, connects simultaneously ground connection behind another divider resistance.Provide the photosensor signal feedback to main control chip.
Described lowering and stabilizing blood pressure power supply circuits are to be connected serially on the fly-wheel diode that expands the stream constant-current circuit other end ground connection behind a voltage-stabiliser tube and a Capacitance parallel connection.
Preferably with above-mentioned control power circuit 4 tunnel in parallel uses, can drive 80 LED lamps about 1W, be fit to the application of street lamp, and one tunnel fault is arranged, not affect other road, can keep the use of street lamp.
This LED street lamp constant-current supply, working stability is reliable, and the form of 4 groups of parallel connections can drive more LED lamp, and brightness is high, and one group of infringement can not cause extinguishing of whole lamp, more can adapt to the needs of street lamp.And, have photosensitive dimming function, can be according to the light conditions of environment, regulation output voltage is regulated the brightness of street lamp automatically, better realizes energy-conservation and increases the service life.
Description of drawings
Fig. 1, the utility model circuit block diagram.
Fig. 2, current flow path figure of the present invention.
Fig. 3, the present invention control a kind of specific embodiment circuit diagram of power supply.
The specific embodiment
With circuit four tunnel in parallel uses of the present invention, consist of the parallel connection type constant-current source, can drive the LED street lamp that 40W-100W does not wait, expand by constant current about the voltage 32V of current circuit 9 stable output electric currents, drive the LED street lamp work of four tunnel same loads.
The below illustrates the structure of circuit of the present invention with one tunnel specific embodiment.
Circuit block diagram as shown in Figure 1: the 220V civil power connects into antisurge and peak voltage circuit 1, then connect successively EMC filter circuit 2, full bridge rectifier 3, PFC correcting circuit 4 and decompression voltage regulator 5, the output of decompression voltage regulator 5 positive voltages, other end negative voltage with expand stream constant-current circuit 9 and be connected with continued flow tube and be connected, continued flow tube 11 series connection accumulation inductance 10 rear outputs on one side, another side is connected to and expands stream constant-current circuit 9, constant-current circuit 9 is connected to PWM output circuit 8 and peak detection circuit 12 simultaneously, to they power supplies; PWM output circuit 8 is take main control chip U1 as core, expand the DRV port that stream constant-current circuit 9 is connected to main control chip U1, and power to main control chip with the vdd terminal mouth that lowering and stabilizing blood pressure power supply circuits 6 are snap-fit attachment to main control chip U1, peak detection circuit 12 is connected on the CS port of main control chip U1, also is connected with photosensitive light adjusting circuit 7 on the EN port of U1.Whole circuit output 32V constant current voltage is loaded on LED street lamp bulb load 13.
Flow chart as shown in Figure 2: after the workflow of whole circuit is electric current process antisurge and peak voltage circuit 1, EMC filter circuit 2, full bridge rectifier 3, PFC correcting circuit 4 and decompression voltage regulator 5, connect PWM output circuit 8, again through expanding the electric current of the required constant voltage of stream constant-current circuit 9 output LED.
Explanation such as the specific embodiment circuit diagram of Fig. 3:
Antisurge and peak voltage circuit 1: by the negative tempperature coefficient thermistor RT of the piezo-resistance RV of parallel connection, series connection and slowly short fuse F1 form;
EMC filter circuit 2: formed by the inductance L 1, L2 and the capacitor C 9 in parallel that are serially connected in the civil power two-way, at ac power input end, generally need to increase the wave filter that is formed by conjugation inductance, X electric capacity and Y electric capacity, to increase the effect of the anti-EMC of whole circuit, filter out conducted interference signal and radiated noise;
Full bridge rectifier 3: full-bridge rectifier is the bridge circuit that high pressure silicon diode D1-D4 forms, and mainly carries out the AC/DC conversion, therefore need to give the safe clearance of 1.5 coefficients;
PFC correcting circuit 4: the electric current of exporting after the common bridge rectifier rectification is pulsating direct current, and electric current is discontinuous, and harmonic distortion is large, and power factor is low, therefore need to increase cheaply passive power factor compensating circuit;
Decompression voltage regulator 5: this main circuit will by diode DZ2 voltage stabilizing, consist of through capacitor C 4 filtering that are connected in parallel on the diode again;
Lowering and stabilizing blood pressure power supply circuits 6: consisted of by voltage-stabiliser tube DZ1 and capacitor C 8 in parallel, voltage stabilizing is carried out in the power supply of main control chip U1;
Photosensitive light adjusting circuit 7: by photodiode D9, and divider resistance R11, R10 formation, the EN that is connected to main control chip U1 holds, feedback light sensation information;
PWM output circuit 8: take main control chip U1 as core, and capacitor C 7 rear ground connection of the TOFF of main control chip U1 end connection, can change the PWM operating frequency of main control chip U1 output by the value of setting different capacitor C 7;
Expand stream constant-current circuit 9: under the effect of sustained diode 8, inductor rectifier L3, high-voltage MOS pipe Q1, low pressure metal-oxide-semiconductor Q2 and current sense resistor, export a voltage at the constant electric current of certain limit, to riches all the way in LED street lamp light pipe energizing quantity.Power supply is provided also for simultaneously PWM output circuit 8;
During this circuit working, the electric main entrance is connected to 1A fuse F1 and antisurge negative tempperature coefficient thermistor RT.Be the EMC wave filter afterwards, formed by inductance L 1, L2 and C9.D1-D4 is rectifying full bridge, adopts 4 high pressure silicon diodes.Capacitor C 3, C4, inductance R9, diode D5～D7 form PPFC, satisfy the requirement of lamp power factor.PWM control chip U1 and MOS pipe Q1, Q2, ballast inductance L3, sustained diode 8 form the Buck decompression transformation, main control chip U1 gathers the peak point current on sensing resistor R5, R7, R8, the VR1, carries out constant current control by the pulse duty factor of internal logic control GATE pin signal.Main control chip U1 by D10, the rectification of R4 current limliting after, after the electronic filter step-down that DZ2, C8 voltage regulation filtering form, power, these lowering and stabilizing blood pressure power supply circuits 6 can provide about 5.1V burning voltage, guarantee main control chip U1 steady operation in full voltage range.The capacitor C 7 that is connected to the TOFF end of main control chip U1 is parts of chip oscillate circuit, changes it and can regulate frequency of oscillation.Potentiometer VR1 in the peak detection circuit 12 is not light modulation in this circuit, but is used for finely tuning the electric current of constant-current source, makes circuit reach design power.Photosensitive light adjusting circuit 7, effect are the brightness of regulating street lamp according to ambient lighting intensity.
Because street lamp constant current control power supply of the present invention preferably uses 4 identical circuit in parallel, for the fine adjusting street lamp brightness of energy in the situation that is implemented in different light, the parameter of divider resistance R10, R11 in four the circuit in the photosensitive light adjusting circuit 7 is all different, selects according to actual operating position.
4 identical constant current control power supplies of the present invention of performance power are in parallel, and each power source loads is 20 white light LEDs series connection, four groups of highlighted white light LEDs that can drive altogether 80 1W, and the electric current of every string is 320 milliamperes.The LED street lamp intensity of illumination of this 80W is equivalent to the effect of common 200W-300W street lamp, and therefore energy-conservation effect is very obvious.
Claims (4)
1.LED street lamp constant current control power supply, antisurge is connected 1 with the peak voltage circuit) the connection civil power, then connect successively EMC filter circuit (2), full bridge rectifier (3), PFC correcting circuit (4) and decompression voltage regulator (5), the output of decompression voltage regulator (5) one ends, the other end is connected 11 with expansion stream constant-current circuit (9) with continued flow tube) be connected, continued flow tube (11) is exported after connecting energy storage inductor (10) again, and continued flow tube (11) also connects expansion stream constant-current circuit (9);
Expand stream constant-current circuit (9) and be connected to PWM output circuit (8) and peak detection circuit (12), PWM output circuit (8) is take main control chip (U1) as core, expand the DRV port that stream constant-current circuit (9) is connected to main control chip (U1), and power to main control chip (U1) with the vdd terminal mouth that lowering and stabilizing blood pressure power supply circuits (6) are snap-fit attachment to main control chip (U1), peak detection circuit (12) is connected on the CS port of main control chip (U1), is connected with photosensitive light adjusting circuit (7) on the EN port; It is characterized in that:
Described expansion stream constant-current circuit (9) is made of a high-voltage MOS pipe (Q1) and a low pressure metal-oxide-semiconductor (Q2), fly-wheel diode (D10), high-voltage tube (Q1) at front, low-voltage tube (Q2) in rear series connection, the centre is drawn circuit and is connected behind the fly-wheel diode (D10) again, be connected to lowering and stabilizing blood pressure power supply circuits (6) and give main control chip (U1) power supply, low-voltage tube (Q2) output is connected on the DRV end of main control chip (U1) of PWM output circuit (8) and powers to main control chip.
2. LED street lamp constant current control power supply according to claim 1, it is characterized in that: described photosensitive regulating circuit (7), contain photosensitive tube (D9), photosensitive tube gets electric from the fly-wheel diode (D10) that expands stream constant-current circuit (9), by the EN end of access main control chip (U1) behind the divider resistance (R10), connect simultaneously the rear ground connection of another divider resistance (R11).
3. LED street lamp constant current control power supply according to claim 1, it is characterized in that: described lowering and stabilizing blood pressure power supply circuits (6) are to be connected serially on the fly-wheel diode (D10) that expands stream constant-current circuit (9) other end ground connection after a voltage-stabiliser tube (DZ1) and an electric capacity (C8) parallel connection.
4. LED street lamp constant current control power supply according to claim 1 and 2, it is characterized in that: described main control chip (U1) is 9910 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010251053 CN101925232B (en) | 2010-08-12 | 2010-08-12 | LED street lamp constant current control power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010251053 CN101925232B (en) | 2010-08-12 | 2010-08-12 | LED street lamp constant current control power supply |
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| CN101925232A CN101925232A (en) | 2010-12-22 |
| CN101925232B true CN101925232B (en) | 2013-04-03 |
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| CN 201010251053 Expired - Fee Related CN101925232B (en) | 2010-08-12 | 2010-08-12 | LED street lamp constant current control power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108135056A (en) * | 2018-01-18 | 2018-06-08 | 上思县东岽电子科技有限责任公司 | A kind of electrically driven (operated) LEDbulb lamp of alternating current-direct current |
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| CN102469668B (en) * | 2011-05-04 | 2013-12-18 | 深圳市金流明光电技术有限公司 | LED power supply circuit capable of being matched with electronic transformer |
| CN103442484B (en) * | 2013-08-15 | 2015-08-12 | 辉芒微电子（深圳）有限公司 | A kind of linear switch constant current LED drive circuit and LED lamp |
| CN103697375B (en) * | 2013-12-05 | 2016-03-02 | 广东融捷光电科技有限公司 | Led street lamp |
| CN105898958B (en) * | 2015-08-05 | 2019-04-12 | 肖志军 | The constant current driving method and circuit of LED light tunable optical |
| CN106151894B (en) * | 2016-08-19 | 2023-04-28 | 中节能晶和科技有限公司 | LED optical unit |
| CN108112131A (en) * | 2018-01-18 | 2018-06-01 | 上思县东岽电子科技有限责任公司 | A kind of electrically driven (operated) LEDbulb lamp driver of alternating current-direct current |
| CN108601134A (en) * | 2018-02-23 | 2018-09-28 | 上思县东岽电子科技有限责任公司 | A kind of LEDbulb lamp of 12W |
| CN108449827A (en) * | 2018-02-23 | 2018-08-24 | 上思县东岽电子科技有限责任公司 | A kind of LEDbulb lamp driver of 12W |
| CN108650727A (en) * | 2018-03-23 | 2018-10-12 | 深圳市电明科技股份有限公司 | A kind of LED light device |
| CN114466488A (en) * | 2022-01-24 | 2022-05-10 | 漳州立达信灯具有限公司 | LED drive circuit and lighting lamp |
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| CN101925232A (en) | 2010-12-22 |
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