CN105934043A - Lamp control system - Google Patents
Lamp control system Download PDFInfo
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- CN105934043A CN105934043A CN201610487197.5A CN201610487197A CN105934043A CN 105934043 A CN105934043 A CN 105934043A CN 201610487197 A CN201610487197 A CN 201610487197A CN 105934043 A CN105934043 A CN 105934043A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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Abstract
The invention provides a lamp control system. The lamp control system comprises an alternating current input filtering unit used for filtering a mains supply signal, a rectification output filtering unit used for converting the alternating current signal output by the alternating current input filtering unit into a direct current signal, and a power factor correction voltage-boosting unit used for receiving the direct current signal output by the rectification output filtering unit and carrying out a voltage-boosting action, wherein the power factor correction voltage boosting unit is provided with a PFC chip U1 and a power supply transformer PFC T1; one end of an auxiliary winding of the power supply transformer PFC T1 is connected to a power supply port of the PFC chip through a rectifier diode D32 and a first series-connection voltage-stabilizing module; and meanwhile, an AC fault detection unit which consists of a photoelectric coupler U800 and a switch tube Q801 is arranged between the alternating current input filtering unit and the rectification output filtering unit. The lamp control system provided by the invention mainly improves the AC fault detection unit, so that the circuit is simplified; and therefore, low power consumption, no detection error and a good effect are realized.
Description
Technical field
The present invention relates to light fixture and control technical field, be specifically related to a kind of lamp control system that single led street lamp is controlled.
Background technology
Street lamp, shows the light fixture that road provides illumination functions, refers to the light fixture in the illumination zone of road surface in traffic lighting.Wherein owing to LED street lamp is compared with other street lamps, having the features such as environment friendly and pollution-free, little power consumption, light efficiency height, life-span length, therefore LED street lamp becomes the optimum selection of reducing energy consumption.Along with science and technology, the development of electron trade and progress, the control system for LED street lamp becomes complicated all the more, and function also becomes diversification all the more.But complicated howsoever, for LED street lamp, its constant-current driving power supply special procured, it is to ensure that its big foundation stone normally worked, the scheme of simple switch power supply often can bring the damage of LED component.For the present situation that China's supply voltage supply is unstable, it is the most necessary that the drive circuit of roads light LED has constant current output characteristic, it is ensured that light output is constant and prevents the overpower of LED from running.
In LED street lamp control system, generally using civil power as power supply, obtain higher voltage signal after being then passed through Active PFC unit (i.e. PFC) boosting, become then through LLC resonant converter circuit conversion and meet the low-voltage DC that street lamp driving requires.But in these lamp control systems, however it remains some design defect:
One, AC fault detection unit is typically designed with for AC AC signal input side, is the most normally the most normally worked with PFC boost circuit to be used for detecting civil power input.But this unit existing design complexity, and it is big to detect error, and Detection results is general, and not ideal enough.
Two, DC fault detection unit is typically designed with for DC DC signal output side, to be used for whether detecting low-voltage dc signal in normal output.But designed in major part system DC fault detection unit peripheral component is many, voltage detecting is not accurate enough, power dissipation ratio is bigger, and how to be constituted with audion, and audion belongs to current drive-type element, ideal base drive current is required by it, and this makes the power consumption above divider resistance increase, and is unfavorable for DC fault detect.
Three, for PFC boost part, it is for boosting the direct current of this circuit of feed-in (DC) or exchange (AC) voltage, can also be arranged as forming the consumer (PFC) that power factor is close to 1 simultaneously.This circuit generally has two kinds of forms: 1. use the passive PFC that the discrete components such as inductance are constituted；2. it is the main active PFC being designed with power factor controller chip.It is being in the main active PFC boost circuit being designed with chip, the most rectified diode of supply port of chip assists winding to be connected with the supply transformer in PFC boost circuit, and once assist the voltage signal of sensing on winding to occur, unstable situation even fluctuates bigger, chip operation is subject to impact, and then PFC boost circuit is not normally functioning.Further, the external switch pipe break-make of PFC boost circuit drives slowly so that there is certain impact when input current enters horizontal phasing control.
Four, for LLC resonant converter part, it is for improving power supply conversion efficiency.This partial circuit has a variety of structure in Power Management Design field.There is employing discrete component to carry out half-bridge driven, also have employing control chip to carry out half-bridge driven.In the resonance oscillation semi-bridge control circuit being made up of LLC resonance control chip, the supply transformer auxiliary winding that the most rectified diode of power supply of chip is connected in PFC boost circuit, and occur that unstable situation even fluctuates bigger once the voltage signal of sensing on this auxiliary winding, chip operation is subject to impact, and then makes resonance oscillation semi-bridge be in unstable working state.Further, for two power tubes of resonance oscillation semi-bridge, its grid is directly connected with the corresponding port of chip, and this makes the break-make speed driving of power tube be under some influence, but also there will be the exception simultaneously turned on, and have impact on the conversion efficiency of power supply.
Five, the resonance transformer at LLC resonant converter circuit is secondary, the most all can access output filter rectification unit, to flow to LED street lamp after the secondary induction voltage of resonance transformer is carried out rectification.For the direct current signal after stable rectification and in order to the voltage/current size of regulation output, a lot of lamp control systems are designed with output voltage/electric current regulation unit.Once output electric current deviate from predeterminated voltage/current value, and this regulation unit will make by feedback that LLC resonant converter circuit is adjusted realizes constant current constant voltage.Present output voltage/electric current regulation unit many employings operational amplifier and some discrete components are constituted, though better regulating effect can be obtained, but owing to the situation of spread of voltage often occurring in terms of power supply, cause amplifier therein work susceptible, and then it is not accurate enough to make to regulate result；And circuit design itself is numerous and diverse, also it is easily caused the problem that regulation is inaccurate, regulation is unstable.
Summary of the invention
It is an object of the present invention to provide a kind of lamp control system, it can like clockwork by AC prime fault detect out, this AC prime malfunction includes that lamp control system does not has the state that ac input signal or PFC boost circuit the most normally work, and solves the deficiency that in prior art, AC failure detector circuit exists.
For achieving the above object, present invention employs following technical scheme:
A kind of lamp control system, including:
City's signal of telecommunication is filtered the exchange input filter unit processed；
The AC signal that described exchange input filter unit exports is converted to the rectification output filter unit of direct current signal；
The direct current signal of reception rectification output filter unit output, and carry out the Active PFC boosting unit of boost action, described Active PFC boosting unit is provided with PFC chip U1 and supply transformer PFC T1, wherein
Auxiliary winding one end of described supply transformer PFC T1 is connected to the power port of PFC chip by commutation diode D32, the first steady module of string；Meanwhile, between described exchange input filter unit and rectification output filter unit, it is provided with AC fault detection unit；Described AC fault detection unit includes:
Photoelectrical coupler U800 and switching tube Q801；Wherein,
The light-emitting diodes tube anode of described photoelectrical coupler U800 is connected to the signal input part of the first steady module of string through resistance R801, and negative electrode is connected to the drain electrode of switching tube Q801；The phototriode base stage of described photoelectrical coupler U800 receives the light that light emitting diode is sent, and colelctor electrode outwards draws composition AC fault detect end, grounded emitter；The source ground of described switching tube Q801, grid is connected to rectification and voltage division unit through resistance R809, and is connected to exchange between input filter unit and rectification output filter unit by rectification and voltage division unit.
Compared to prior art, the above-mentioned lamp control system of the present invention has the advantages that
The above-mentioned lamp control system of the present invention achieves the AC prime fault detect to lamp control system by cooperating of photoelectrical coupler U800 and switching tube Q801, this circuit design is simple, low in energy consumption, and make only just to can determine that when exchange input is higher than about 85V that exchange input is without exception by design rectification and voltage division unit, avoid the misoperation that low pressure produces, achieving detection error free, Detection results is good.And the resistance R809 designed can play the effect of protection switching tube Q801.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part is also by by being understood by the person skilled in the art the research of the present invention and practice.
Accompanying drawing explanation
Fig. 1 is the theory diagram of lamp control system of the present invention；
Fig. 2 is the Active PFC boosting unit schematic diagram of lamp control system of the present invention；
Fig. 3 is the AC fault detection unit schematic diagram of lamp control system of the present invention；
Fig. 4 is the LLC resonant converter control unit schematic diagram of lamp control system of the present invention；
Fig. 5 is the output rectification filter unit schematic diagram of lamp control system of the present invention；
Fig. 6 is the DC fault detection unit schematic diagram of lamp control system of the present invention；
Fig. 7 is the supply voltage VCC3 generation figure of the output voltage/electric current regulation unit of lamp control system of the present invention；
Fig. 8 is the output voltage/electric current regulation unit schematic diagram of lamp control system of the present invention；
Fig. 9 is the output over-voltage protection unit schematic diagram of lamp control system of the present invention；
Figure 10 is the three-in-one light adjusting circuit figure of lamp control system of the present invention.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reaching purpose and act on more clear and be apparent to, the present invention is further elaborated with detailed description of the invention below in conjunction with the accompanying drawings:
Seeing Fig. 1 and combine Fig. 2-3, the present invention proposes a kind of lamp control system, including: city's signal of telecommunication is filtered the exchange input filter unit processed；The AC signal that described exchange input filter unit exports is converted to the rectification output filter unit of direct current signal；Receive the direct current signal of rectification output filter unit output, and carry out the Active PFC boosting unit (hereinafter referred to as PFC boost unit) of boost action, described Active PFC boosting unit is provided with PFC chip U1 and supply transformer PFC T1.Wherein, as the improvement project of the present invention:
Auxiliary winding one end of described supply transformer PFC T1 is connected to the power port of PFC chip by commutation diode D32, the first steady module of string；Meanwhile, between described exchange input filter unit and rectification output filter unit, it is provided with AC fault detection unit；Described AC fault detection unit includes: photoelectrical coupler U800 and switching tube Q801；Wherein, the light-emitting diodes tube anode (1 foot) of described photoelectrical coupler U800 is connected to the signal input part (i.e. VCC801 in Fig. 2) of the first steady module of string through resistance R801, and negative electrode (2 foot) is connected to the drain electrode of switching tube Q801；The phototriode base stage of described photoelectrical coupler U800 receives the light that light emitting diode is sent, and colelctor electrode (4 foot) is outwards drawn and constituted AC fault detect end, emitter stage (3 foot) ground connection；The source ground of described switching tube Q801, grid is connected to rectification and voltage division unit through resistance R809, and is connected to exchange between input filter unit and rectification output filter unit by rectification and voltage division unit.It is 10K Europe that resistance R809 preferentially chooses resistance.
In such scheme, as seen from Figure 3, switching tube Q801 preferentially uses metal-oxide-semiconductor.When specifically detecting, AC fault detect end is detected by external microcontroller, and now 4 feet of photoelectrical coupler U800 access a test voltage by external pull-up resistor.When the AC of lamp control system has the alternating current higher than 85V to input (having voltage on R809) and PFC can normally work, VCC801 voltage is normal, switching tube Q801 turns on, photoelectrical coupler 1-2 foot turns on, now 4 feet of photoelectrical coupler are low-voltage, the level signal of i.e. AC fault detect end AC-OK is low level, and therefore single-chip microcomputer will pass through this low level and quickly judges that lamp control system has AC signal to input, and PFC boost circuit is working properly.If the AC of lamp control system is abnormal without exchange input or the work of PFC boost circuit, switching tube Q801 grid no-voltage or VCC801 no-voltage, 4 foot voltages of photoelectrical coupler are high voltage, the level signal of i.e. AC fault detect end AC-OK is high level, with pull-up test voltage keep consistent, therefore single-chip microcomputer will pass through this high level judgement current lamp control system there is AC prime fault.
As shown in Figure 3, described rectification and voltage division unit includes: commutation diode D14 and commutation diode D15, the anode of the two is respectively connecting to exchange two holding wires between input filter unit and rectification output filter unit, and the negative electrode of the two is by the electric capacity C64 of series connection, electric capacity C65 ground connection；Being sequentially connected in series, by resistance R25, resistance R26, resistance R27 and resistance R28, the partial pressure unit constituted, the other end of resistance R25 accesses commutation diode D14 and the negative electrode of commutation diode D15, and the other end of resistance R28 accesses ground；Wherein, one end of described resistance R809 accesses the grid of switching tube Q801, the concatenation point that the other end is connected between resistance R27 and resistance R28 by stabilivolt ZD20, and the anode of described stabilivolt ZD20 accesses ground also by resistance R29.
Here, when exchanging extraction AC fault detection unit between input filter unit and rectification output filter unit, also by design rectification and voltage division unit, switching tube Q801 is effectively ensured with this and just can work by normally at exchange about 85V, it is to avoid the misoperation that low pressure produces.It is further; also being parallel with a stabilivolt between the drain electrode and source electrode of switching tube Q801, first this stabilivolt is to protect Q801 grid, and next also functions to when AC voltage is more than 85V; the effect that Q801 just can turn on, it is to avoid the erroneous judgement that low-voltage produces.In rectification and voltage division unit, resistance R25, resistance R26 and resistance R27 preferentially choose resistance value and preferentially choose resistance value at 510K at 402K, resistance R28.Resistance R29 preferentially chooses resistance value at 82K.Stabilivolt ZD20 chooses the burning voltage stabilivolt at 18V.
Specifically, the AC signal of exchange input filter unit output carries out dividing potential drop after D14, D15 rectification on resistance R25, resistance R26, resistance R27 and resistance R28, and now R809 power taking pressure from stabilivolt ZD20 and resistance R29 is sent to the grid of switching tube.When the AC of lamp control system have higher than 85V alternating current input, the most normally work input AC electricity time, resistance R809 has voltage, has then just possessed, between grid and the source electrode of switching tube, the turn-on condition promoting switching tube to turn on.If the PFC boost unit now in lamp control system also is able to normally work, voltage signal is had at i.e. VCC801, so light emitting diode of photoelectrical coupler U800 just has electric current to pass through, now 4 feet (AC fault detect end) output low level, external microcontroller judges the AC prime fault-free of lamp control system.If the PFC boost unit now in lamp control system fails normally to work, no-voltage signal at i.e. VCC801, so light emitting diode of photoelectrical coupler does not has electric current to pass through, now 4 feet (AC fault detect end) output high level, external microcontroller judges that the AC prime of lamp control system is faulty.Either no-voltage or VCC801 no-voltage on resistance R809, according to the high level detected, external microcontroller all can judge that lamp control system exists AC prime fault.
Wherein, also show switching tube Q20 in Fig. 3, this switching tube Q20 drain electrode accesses the FB pin of PFC chip U1 by resistance R33, and grid accesses the anode of ZD20, source ground.What it was constituted is the low voltage protection circuit part of PFC chip U1.When exchange input is less than preset value, the FB pin of chip U1 is forced to be reduced to UVP so that chip U1 enters into standby mode.When exchange input is higher than preset value, chip U1 just starts normally to work.Such as preset value is taken at 85VAC, then, when exchange input is less than 85VAC, ZD20 does not turns on, and metal-oxide-semiconductor Q20 ends, and under FB, dividing potential drop is R34, and IC is in UVP state (under-voltage protection)；When exchange input is higher than 85VAC, ZD20 reverse-conducting, metal-oxide-semiconductor Q20 turns on, and under FB, dividing potential drop is by R33//R34, normal partial pressure point, and main output is normally set up.
In such scheme it has been mentioned that, in PFC boost unit, auxiliary winding one end of described supply transformer PFC T1 is connected to the power port of PFC chip by commutation diode D32, the first steady module of string, thus draw second technical problem that the present invention solves, the most how to allow PFC chip U1 can steady operation, and then ensure the adjustment of power factor (PF) is reached optimal value.The present invention solves this technical problem by being designed with the first steady module of string at the power port VCC of PFC.
Seeing Fig. 2, in Active PFC boosting unit, the first steady module of string that auxiliary winding one end of described supply transformer PFC T1 is connected by described commutation diode D32 includes:
Switching tube Q32, the base stage of described switching tube Q32 passes through stabilivolt ZD31 ground connection, the colelctor electrode of described switching tube Q32 is connected with the negative electrode of commutation diode D32 and is connected to self base stage by resistance R46, the emitter stage of described switching tube Q32 accesses the power port of PFC chip U1 by diode D34, and the cathode side at diode D34 is also associated with stabilivolt ZD30 and is connected in parallel on the electric capacity C38 at stabilivolt ZD30 two ends, described stabilivolt ZD31, the plus earth of stabilivolt ZD30；The negative electrode of described commutation diode D32 is also by electric capacity C36 ground connection.Electric capacity C36, electric capacity C38 all use polar capacitor, and both plays the effect to signal filtering.
Primary side winding one end of described supply transformer PFC T1 is connected with the signal output part of rectification output filter unit, the other end outwards draws the signal output constituting Active PFC boosting unit by diode D2, critesistor RTH1, and this signal output part is provided with filtering bulky capacitor C5.C5 uses ruby electric capacity, and in the operating temperature range of regulation, this electric capacity can work stably in a long term, and the maximum DC voltage that it can bear is at 450V, and i.e. rated operational voltage is at 450V.
When the signal of rectification output filter unit output flows to the primary side winding of supply transformer PFC T1, the induced signal produced at supply transformer PFC T1 auxiliary winding first passes through commutation diode D32 rectification, is then fed into the colelctor electrode of switching tube Q32.Now make the base stage voltage stabilizing of switching tube Q32 to 18V due to the existence of stabilivolt ZD31; output 3 foot (i.e. emitter stage) of switching tube Q32 can be at about 18-0.3V; the most again through D34 one-way conduction; ZD30 protects again, it is ensured that the supply port VCC perseverance of Active PFC control chip U1 is operated in about 17V.No matter now how circuit voltage fluctuates, voltage/current impact is all born on switching tube Q32, plays a very good protection chip U1.Wherein the operating current of stabilivolt ZD31 have only to 1mA less than, it is possible to providing electric current needed for work to chip U1, stabilivolt ZD31 is low in energy consumption, and circuit is stable and reliable in work.In some lamp control systems, mu balanced circuit does not design switching tube, and that voltage/current will load on stabilivolt completely, and as fruit chip U1 is operated under case of heavy load, stabilivolt power consumption is high, fragile.
See Fig. 2, for supply transformer PFC T1, its auxiliary winding is also drawn centre cap (pin6) and is accessed ground wire, and between centre cap and commutation diode D32, it is additionally provided with diode D33, prevent in PFC inductance, there is a little DC component electric current, prevent inductance saturated, reduce magnetic hystersis loss.Mos pipe Q1 is open-minded, and electric current crosses C35, D33；Mos pipe Q1 turns off, and electric current crosses C35, D32.Add C35 stopping direct current component.The auxiliary winding other end (pin5) of supply transformer PFC T1 is connected to the ZCD pin (5 foot) of U1 by resistance R37, it is used for sensing ancillary coil voltage, inductance the most loss of excitation during detection CrM (critical mode of operation) work.
PFC boost unit provided by the present invention is in addition to improving the powerup issue of chip U1, and the switching tube Q1 also driven for chip U1 devises the first switching tube accelerator module.This first switching tube accelerator module is for accelerating rising edge when being turned on and off and the time of trailing edge of switching tube Q1.Owing to the speed of the edge time of the switching of switching tube Q1 determines the loss opened and close of Q1.Therefore control it necessary.I.e., as the present invention to the further improvement project of PFC boost unit it is: combine Fig. 2, described PFC chip U1 has for driving the signal of external switch pipe Q1 to drive port (7 foot-DRV pin), and described signal drives and is provided with the first switching tube accelerator module between port and the grid of switching tube Q1；The source electrode of described switching tube Q1 passes through resistance R8 ground connection, and drain electrode is connected to the described other end of supply transformer PFC T1 primary side winding.Described first switching tube accelerator module includes stabilivolt D31, diode D6, resistance R6, resistance R7 and switching tube Q2；Wherein, described signal drives port to be connected to the negative electrode of stabilivolt D31, the anode of diode D6 and the base stage of switching tube Q2, the plus earth of described stabilivolt D31, the negative electrode of described diode D6 is connected by the grid of resistance R6 and switching tube Q1, the emitter stage of described switching tube Q2 is connected by the grid of resistance R7 and switching tube Q1, and the colelctor electrode of described switching tube Q2 is connected to the source electrode of switching tube Q1.The resistance size resistance R5 at 10K ohm it is additionally provided with, in order to protect switching tube Q1 between grid and the source electrode of described switching tube Q1.
When controlling switching tube Q1 conducting, the control signal that chip U1 signal driving port (DRV pin) exports, through D6 and R6, delivers to Q1 grid, and R6 resistance is less, promotes Q1 fast conducting, and rising time is short；When controlling Q1 and disconnecting, the control signal that chip U1 signal drives port (DRV pin) to export is loaded into the base stage of switching tube Q2 so that Q2 turns on, now metal-oxide-semiconductor Q1 signal is through diode D6, resistance R6, R7, audion Q2 are released, and then accelerate to turn off.
For PFC chip, it also has FB pin (1 foot), and this pin is the reverse input end of chip internal error amplifier, when this pin voltage higher than OVP voltage or less than UVP voltage or unsettled time, chip quits work.Therefore may utilize this pin and carry out overvoltage and under-voltage protection.See from Fig. 2, FB pin through divider resistance R30, R31, R32, RJ10, R34 from circuit signal outfan pressure, to realize overvoltage protection.Fig. 3 shows the low voltage protection circuit part of chip U1.When exchange input is less than preset value, the FB pin of chip U1 is forced to be reduced to UVP so that chip U1 enters into standby mode.When exchange input is higher than preset value, chip U1 just starts normally to work.Such as preset value is taken at 85VAC, then, when exchange input is less than 85VAC, ZD20 does not turns on, and metal-oxide-semiconductor Q20 ends, and under FB, dividing potential drop is R34, and IC is in UVP state (under-voltage protection)；When exchange input is higher than 85VAC, ZD20 reverse-conducting, metal-oxide-semiconductor Q20 turns on, and under FB, dividing potential drop is by R33//R34, normal partial pressure point, and main output is normally set up.
The PFC boost unit of the above-mentioned offer of the present invention is to control IC chip by special Active PFC to remove to adjust the waveform of input current, phase contrast between current/voltage is compensated, and then the power factor (PF) of raising electrical network, ensure the efficient utilization rate of electrical network, belong to active PFC.
Lamp control system provided by the present invention also includes the LLC resonant converter control unit being arranged on rear side of Active PFC boosting unit.The 3rd technical problem that the invention solves the problems that, the most how to allow the LLC resonance control chip U900 can steady operation, and then ensure stability contorting to resonance oscillation semi-bridge, enable to be connected to the LC resonant network on rear side of resonance oscillation semi-bridge, synchronous rectification unit normally exports the low-voltage dc signal required for light fixture.The present invention solves this technical problem by being designed with the second steady module of string at the power port VCC of LLC.
See Fig. 4 and combine Fig. 2, described LLC resonant converter control unit includes: LLC resonance control chip U900, it has supply port, auxiliary winding one end of described supply transformer PFC T1 also leads to pressure point A by described commutation diode D32, described pressure point A is connected to described supply port by the second steady module of string, the described second steady module of string includes: switching tube Q10, its colelctor electrode is connected to pressure point A and is connected to the base stage of self by resistance R22；The anode that its base stage accesses ground and stabilivolt ZD10 by stabilivolt ZD10 is earth terminal；Its emitter stage accesses supply port by electric capacity C17 ground connection and by resistance J11；It is provided with electric capacity C16 between pressure point A and ground, between supply port and ground, is provided with electric capacity C60 and electric capacity C61.Here, A point signal (i.e. entering the signal before the steady unit of string) is filtered by electric capacity C16, and the signal of string steady unit output is filtered by electric capacity C61 and electric capacity C60, noiseless to ensure the voltage stabilization being input to chip U900VCC.
In such scheme, A point voltage is sent to the colelctor electrode of switching tube Q10, now make the base stage voltage stabilizing of switching tube Q10 to 13V due to the existence of stabilivolt ZD10, output 3 foot (i.e. emitter stage) of switching tube Q10 is permanent at about 13-0.3V, then it is applied to supply port VCC of resonance control chip U900 by resistance J11, is operated in about 12.5V with the supply port VCC perseverance that this ensures resonance control chip U900.No matter now how circuit voltage fluctuates, voltage/current impact is all born on switching tube Q10, plays a very good protection chip U900.Wherein the operating current of stabilivolt ZD10 have only to 1mA less than, it is possible to providing electric current needed for work to chip U900, stabilivolt ZD10 is low in energy consumption, and circuit is stable and reliable in work.In some lamp control systems, mu balanced circuit does not design switching tube, and that voltage/current will load on stabilivolt completely so that stabilivolt power consumption is high, fragile.
LLC resonant converter control unit involved in the present invention and traditional LLC controlled resonant converter the most also include resonance oscillation semi-bridge (being made up of switching tube Q5 and switching tube Q6), chip U900 regulates their operating frequency (abbreviation switching frequency) by controlling the conducting of two switching tubes and closedown in resonance oscillation semi-bridge, regulate output voltage size with this, and two switching tube dutycycles during whole control are to maintain constant.This is different from the energy transmission means of PWM controller, and the energy transmission of PWM controller is to be controlled by the dutycycle of master switch.When gently loading, operating frequency gradually rises, and is operated in depressurization area；And when heavy duty, operating frequency is gradually lowered, it is operated in boosting region.
As shown in Figure 4, described LLC resonant converter control unit also includes the resonance oscillation semi-bridge being made up of switching tube Q5 and switching tube Q6；Wherein, the source electrode of described switching tube Q5 is connected composition cascaded structure with the drain electrode of described switching tube Q6 and concatenation point is outwards drawn and is connected to a LC resonant network；The drain electrode of described switching tube Q5 receives the voltage signal from the output of Active PFC boosting unit, and grid is connected with the high-side driver output pin (HVG pin) of LLC resonance control chip U900 by second switch pipe accelerator module；The source ground of described switching tube Q6, grid drives output pin (LVG pin) to be connected by the 3rd switching tube accelerator module with the low side of LLC resonance control chip U900.Chip U900 is by controlling the conducting of Q5 and Q6 and closedown so that LC resonant network constantly transfers electrical energy into secondary output end, then becomes unidirectional current through the synchronous rectification cell translation of secondary output end, is loaded on lamp load.And the purpose designing respective switch pipe accelerator module between the respective drive pin of switching tube Q5 and the grid of switching tube Q6 and chip is to prevent Q5, Q6 simultaneously turns on.
In such scheme, the second switch pipe accelerator module mentioned includes stabilivolt ZD50, diode D56, resistance R13, resistance R9 and switching tube Q51；See Fig. 4, the high-side driver output pin (HVG pin that is 15 foot) of resonance control chip U900 is connected to the negative electrode of stabilivolt ZD50, the anode of diode D56 and the base stage of switching tube Q51, the anode of described stabilivolt ZD50 is connected to the high-side driver floating ground pin (OUT pin that is 14 foot) of resonance control chip, the negative electrode of described diode D56 is connected by the grid of resistance R13 and switching tube Q5, the emitter stage of described switching tube Q51 is connected by the grid of resistance R9 and switching tube Q5, and the colelctor electrode of described switching tube Q51 is connected to the source electrode of switching tube Q5.The resistance size resistance R10 at 10K ohm it is additionally provided with, in order to protect switching tube Q5 between grid and the source electrode of described switching tube Q5.Operation principle is as follows: when controlling Q5 conducting, and the control signal of the HVG pin output of chip U900, through D56 and R13, delivers to Q5 grid, and R13 resistance is less, promotes Q5 fast conducting, and rising time is short；When controlling Q5 and disconnecting, the control signal of the HVG pin output of chip U900 is loaded into the base stage of switching tube Q51 so that Q51 turns on, and now metal-oxide-semiconductor Q5 signal is released through diode D56, resistance R13, R9, switching tube Q51, and then accelerates to turn off.Here switching tube Q51 preferentially uses PNP type triode.
In such scheme, the 3rd switching tube accelerator module mentioned has the structure identical with second switch pipe accelerator module, i.e. includes stabilivolt ZD51, diode D55, resistance R15, resistance R11 and switching tube Q50；See Fig. 4, the low side of resonance control chip drives output pin (LVG pin) to be connected to the negative electrode of stabilivolt ZD51, the anode of diode D55 and the base stage of switching tube Q50, the plus earth of described stabilivolt ZD51, the negative electrode of described diode D55 is connected by the grid of resistance R15 and switching tube Q6, the emitter stage of described switching tube Q50 is connected by the grid of resistance R11 and switching tube Q6, and the colelctor electrode of described switching tube Q50 is connected to the source electrode of switching tube Q6.The resistance size resistance R12 at 10K ohm it is additionally provided with, in order to protect switching tube Q6 between grid and the source electrode of described switching tube Q6.Operation principle is as follows: when controlling Q6 conducting, and the control signal of the LVG pin output of chip U900, through D55 and R15, delivers to Q6 grid, and R15 resistance is less, promotes Q6 fast conducting, and rising time is short；When controlling Q6 and disconnecting, the control signal of the LVG pin output of chip U900 is loaded into the base stage of switching tube Q50 so that Q50 turns on, and now metal-oxide-semiconductor Q6 signal is released through diode D55, resistance R15, R11, switching tube Q50, and then accelerates to turn off.Here switching tube Q50 preferentially uses PNP type triode.
In second switch pipe accelerator module, the preferential value of R13 10 ohm, the preferential value of R9 is in 15 Europe；And in the 3rd switching tube accelerator module, the preferential value of R15 is 15 ohm, the preferential value of R11 is at 10 ohm.So design resistance size makes upper and lower half-bridge driven and vent discharge resistance different, ensures that upper and lower bridge turns on Dead Time with this, is prevented effectively from the exception occurring that upper and lower metal-oxide-semiconductor (Q5, Q6) simultaneously turns on.
As can be seen here, the present invention has identical circuit structure for the first switching tube accelerator module of switching tube Q1 design and second switch pipe accelerator module and the 3rd switching tube accelerator module designed for switching tube Q5, Q6 in LLC resonant converter control unit in PFC boost unit.Operation principle is also similar to.
Seeing Fig. 4 and combine Fig. 5, described LLC resonant converter control unit also includes resonance transformer LLC T1, and it has armature winding, secondary windings, primary accessory power supply winding and secondary accessory power supply winding；Wherein, described armature winding is used for constituting LC resonant network；Described secondary windings is for connecting the output rectification filter unit being made up of two synchronous rectification control chips；Described primary accessory power supply winding is for being connected to pressure point A by diode D11 and resistance R81；Described secondary accessory power supply winding for producing the supply voltage VCC3 (as shown in Figure 7) that the output voltage/electric current regulation unit of lamp control system can be made normally to work by the 3rd steady module of string.
Here, LC resonant network is made up of the armature winding L (pin12-pin13) and C33 of resonance transformer LLC T1.And synchronous rectification 1 (pin2-pin5) and synchronous rectification 2 (pin1-pin4) it is provided with in the secondary windings side of resonance transformer T1, flow to street lamp after carrying out rectification with the secondary induction voltage signal to resonance transformer T1.Here synchronous rectification 1 and synchronous rectification 2 all use TEA1791A synchronous rectification chip to constitute, i.e. U101 and U102.Detailed circuit sees Fig. 5.Wherein, the synchronous rectification 1 that U101 is constituted is the positive half cycle work of the alternating current at transformer induction, and the synchronous rectification 2 that U102 is constituted is the negative half period work of the alternating current at transformer induction, so that the whole cycle of the alternating current of transformer induction all has rectification to export.Light fixture is connected between VOUT+ and VOUT-.The primary accessory power supply winding pin9-pin10 of resonance transformer LLC T1 is designed with diode D11, electric capacity C15 and C18, and diode D11 negative electrode is linked into A point through resistance R81.The secondary accessory power supply winding pin6-pin7 of resonance transformer LLC T1, for induced voltage is produced a stable VCC3 (seeing Fig. 7) through the 3rd string steady module, provides stabilized power source for output voltage/electric current regulation unit.This is the 4th technical problem that the invention solves the problems that.
See Fig. 8, which show the principle design figure of the output voltage/electric current regulation unit of the present invention.Which includes output voltage regulation unit and output current regulation unit, described output voltage regulation unit obtains output to the voltage signal V+ of light fixture from output rectification filter unit, described output current regulation unit obtains output to the current signal (being gathered by inspection leakage resistance J101 so that have, between ground SGND and ground SPGND, the electric potential difference changed with output curent change) of light fixture from output rectification filter unit.As improvements over the prior art of the present invention it is:
As shown in Figure 8 and combine Fig. 4 and Fig. 7, described output voltage regulation unit and output current regulation unit share same supply voltage VCC3, and this supply voltage VCC3 is to be obtained by above-mentioned the 3rd described steady module of string by secondary accessory power supply winding (pin6-pin7)；Wherein, the described 3rd steady module of string includes audion Q200, stabilivolt ZD200 and resistance R200；One end (pin6) the ground connection SGND of described secondary accessory power supply winding, the other end (pin7) accesses the colelctor electrode of audion Q200 by diode D200, resistance R203；The negative electrode of described stabilivolt ZD200 is connected with the base stage of audion Q200, plus earth SGND；The two ends of described resistance R200 are respectively connecting to colelctor electrode and the base stage of audion Q200；The emitter stage of described audion Q200 exports described supply voltage VCC3.
Operation principle is as follows: the induced signal produced on secondary accessory power supply winding pin6-pin7 is sent to the colelctor electrode of audion Q200 through D200, R203, now make the base stage voltage stabilizing of audion Q200 to 13V due to the existence of stabilivolt ZD200, therefore output 3 foot (i.e. emitter stage) of audion Q200 is permanent at about 13-0.3V, thus exports perseverance and be operated in the supply voltage VCC3 of about 12.5V.In this case, no matter how road voltage fluctuates, voltage/current impact is all born on audion Q200, without the supply voltage VCC3 of output is had any impact.Further, the one end being connected with audion Q200 colelctor electrode at resistance R203 and resistance R203 is additionally provided with filter capacitor C202, C201.Described supply voltage VCC3 accesses ground SGND also by electric capacity C205, C134.Here, the supply voltage VCC3 obtained mainly is filtered processing by C205, C134, so that the supply voltage VCC3 obtained is in interference the most glitch-free little state.
Seeing Fig. 8 and combine Fig. 4, described output voltage regulation unit is mainly made up of amplifier U107A, and the homophase in amplifier U107A inputs (3 foot) and with voltage reference point 2. 1. anti-phase input (2 foot) be respectively arranged with voltage reference point.And the output of amplifier U107A (1 foot) is connected to 2 feet of optocoupler U4.Signal is fed back to LLC resonance control chip U900 by 4 feet of optocoupler U4.Circuit in conjunction with Fig. 8, operation principle is as follows: when output rectification filter unit exports and changes to the voltage signal V+ of light fixture, the voltage reference point of inverting input 2 foot voltage 2. will change, now reference voltage V REF (i.e. voltage reference point is 1.) of this voltage signal with in-phase input end 3 foot is then compared by amplifier U107A, and then exports a level higher or on the low side at amplifier U107A outfan 1 foot.From the circuit connecting relation of Fig. 3, the level that this is higher or on the low side directly influences the conducting degree of light emitting diode in optocoupler U4, and then have influence on the signal height of optocoupler U4 forward end LLC resonance control chip feedback, will be by adjusting switching frequency after LLC resonance control chip receives the signal of optocoupler U4 feedback so that output voltage is adjusted.Therefore, here optocoupler U4 plays constant voltage effect.
Described voltage sample circuit includes resistance R147, resistance R148 and the variable resistance SVR2 (two of variable resistance SVR2 fixing end series connection) of series connection；Wherein, the other end of described resistance R147 obtains from output rectification filter unit that output fixing terminates ground SGND to another of the voltage signal V+, variable resistance SVR2 of light fixture, sliding end accesses ground SGND and the pressure point being connected between resistance R147 and resistance R148 by electric capacity C138；The inverting input of described amplifier U107A is connected to described pressure point (i.e. voltage reference point in Fig. 2 is 2.) by resistance R140.
Seeing Fig. 8 and combine Fig. 4, described output current regulation unit is mainly made up of amplifier U107C, and the homophase in amplifier U107C inputs (10 foot) and with current reference point 2. 1. anti-phase input (9 foot) be respectively arranged with current reference point.And the output of amplifier U107C (8 foot) is connected to 2 feet of optocoupler U4.Signal is fed back to LLC resonance control chip U900 by 4 feet of optocoupler U4.Ground SPGND is flowed to the current signal of light fixture from ground SGND sampled resistance J101 owing to output filter rectification unit exports.Therefore, between ground SGND and ground SPGND, there is electric potential difference, this electromotive force extent △ U=I*J101.The change of output electric current can cause the voltage difference between ground SGND and ground SPGND to change, and output electric current of the present invention regulation is based on what this voltage difference was carried out.
Operation principle: when the voltage of amplifier U107C in-phase input end 10 foot is higher than inverting input 9 foot when, the level of amplifier U107C outfan 8 foot is higher, and the conducting of optocoupler U4 is affected；When the voltage of amplifier U107C in-phase input end 10 foot is less than inverting input 9 foot when, the level of amplifier U107C outfan 8 foot is on the low side, and the conducting degree of optocoupler U4 strengthens.Follow-up principle is similar with the output voltage of above-mentioned analysis regulation unit principle, repeats no more here.
When exporting the Io to the current ratio setting of light fixture and being bigger than normal, voltage difference between ground SGND and ground SPGND increases, the voltage making ground SPGND reduces, now the voltage between VREF and SPGND increases, electric current increases, and the current reference point of homophase input 10 voltage 1. increases, higher than anti-phase input 9 foot, the level of amplifier U107C output 8 is higher, and the conducting degree of optocoupler U4 is affected.Being then passed through the feedback of optocoupler U4, LLC resonance control chip will make output current reduction be adjusted to the electric current Io set by adjusting switching frequency.Otherwise, when output rectification filter unit export to light fixture current ratio set Io less than normal time, the conducting degree of optocoupler U4 strengthens, and through the feedback of optocoupler U4, LLC resonance control chip will make output electric current increase the electric current Io being adjusted to set by adjusting switching frequency.Therefore, here optocoupler U4 plays constant current effect.
In above-mentioned given output voltage regulation unit and output current regulation unit, being provided with variable resistance, wherein variable resistance SVR2 may be used for manually regulating the size of output voltage V+, and variable resistance SVR1 may be used for manually regulating the size of output electric current.
As the present invention, another to solve the technical problem that and to be to provide a kind of DC failure detector circuit.See Fig. 6, lamp control system of the present invention also includes DC fault detection unit, comprising: switching tube Q802, its drain electrode is outwards drawn and is constituted DC fault detect end, source ground, grid is connected to by resistance R804, the partial pressure unit that stabilivolt ZD800 and resistance R802 is in series, one end of resistance R804 obtains DC voltage from described output rectification filter unit, the other end of resistance R804 is connected to the negative electrode of stabilivolt ZD800, one end of resistance R802 is connected with the anode of stabilivolt ZD800, the other end ground connection of resistance R802, the grid of described switching tube Q802 is connected to the anode of stabilivolt ZD800；Meanwhile, the described other end of resistance R804 is also through resistance R803 ground connection.
The DC failure detector circuit peripheral element of present invention design is few, and is set with stabilivolt by divider resistance R804, R802, can accurately detect D/C voltage.When specifically detecting, DC fault detect end is detected by external microcontroller, and the now drain electrode of field-effect transistor Q802 accesses a test voltage by external pull-up resistor.Therefore, if the street lamp DC voltage of the output rectification filter unit output of lamp control system is in normal range of operation, then metal-oxide-semiconductor Q802 can turn on, and 3 feet i.e. drain output low level, otherwise export high level.When external microcontroller knows that this pin is low level, then judge that the direct current of lamp control system normally exports, when external microcontroller knows that this pin is high level, then judge the direct current of lamp control system to fail normally and export.
As the extension program of the present invention, lamp control system of the present invention is also provided with output over-voltage protection unit, and it is connected between output rectification filter unit and LLC resonant converter control unit.Seeing Fig. 9 and combine Fig. 4, this output over-voltage protection unit is mainly made up of optocoupler U3 and precision voltage regulator TL431.When output voltage changes, the 1 foot level of precision voltage regulator TL431 changes, so that optocoupler U3 conducting degree is affected, and then the signal feeding back to LLC resonant converter control unit is changed.Then adjusted switching frequency by LLC resonant converter control unit, make output voltage that contrary change to occur.
As the extension program of the present invention, lamp control system of the present invention is also provided with three-in-one light adjusting circuit on the basis of output current regulation unit.As shown in Figure 10, this three-in-one light adjusting circuit specifically includes that
The voltage follow module being made up of operational amplifier U107D, the signal output part of described operational amplifier U107D is connected to current reference divider resistance by diode D300, and is connected to export current regulation control unit by current reference divider resistance；The in-phase input end of operational amplifier U107D is connected to the anode of diode D302 by resistance R310, receiving external dimmer signal between negative electrode (VR1 end) and the ground SGND of described diode D302, described external dimmer signal includes that voltage magnitude is the pwm signal of 10V, 1-10V voltage signal or 10K-100K dimming resistor；
Wherein, the anode of described diode D302 is connected to the in-phase input end of operational amplifier U108A by resistance R308, using the external dimmer signal that will access between negative electrode and the ground SGND of diode D302 as a wherein road homophase input of operational amplifier U108A；Another road homophase input of described operational amplifier U108A is that the reference voltage signal Vref1, described reference voltage signal Vref1 connected by resistance R301 is generated by a reference voltage generation module；The anode of described diode D302 is connected to the outfan of operational amplifier U108A also by resistance R309；The inverting input of described operational amplifier U108A passes through resistance R302 ground connection, and is additionally provided with resistance R303 between inverting input and outfan；Further, the anode of described diode D302 is also by diode D301, stabilivolt ZD301 ground connection, and the negative electrode of diode D301 is connected with the negative electrode of stabilivolt ZD301, the plus earth of stabilivolt ZD301.
Above-mentioned current reference divider resistance is in series by resistance R307 and resistance R146, and the output signal of described operational amplifier U107D sequentially passes through resistance R307 and resistance R146 and sends into one of them current reference point of output current regulation control unit.Specifically, the output signal of operational amplifier U107D is to be sent to export the current reference point of current regulation control unit 1., sees Figure 10.
The operation principle of the three-in-one light adjusting circuit of above-mentioned LED is as follows:
When the PWM mode of voltage mode light modulation or generation pwm signal that VR1 termination generates 1-10V voltage signal dims, amplifier U108A is operated in saturation region, now VR1 end is clamped at V, i.e. NetHLG-1 voltage is V+0.3, after amplifier U107D is followed, the voltage connecting current reference divider resistance end is V+0.3.Now, the current reference point of output current regulation unit voltage 1. correspondingly changes, and light fixture just can be followed applied voltage and be dimmed.Owing to pwm signal is square-wave signal, when its dutycycle changes, its voltage effective value V also can change.Here it is that the voltage effective value V regulation utilizing PWM square-wave signal carries out lamp light-regulating.When voltage mode light modulation or PWM mode light modulation are by voltage modulated to 1V, and lamp current is with 10% output, dark；When voltage mode dimmer or PWM mode dimmer are by voltage modulated to 10V, and lamp current 100% exports, brighter.
When VR1 terminates 10K-100K dimming resistor, the homophase input of amplifier U108A is equivalent to add this regulation resistance, change amplifier positive feedback input, amplifier U108A is made to be operated in linear amplification region, therefore after amplifier U108A, NetHLG-1 voltage will present 1V-10V linear convergent rate with 10K-100K, and then to make to connect current reference divider resistance terminal voltage be the 1-10V with resistive linearity change, and lamp current can export with 10-100%.
In above-mentioned three kinds of light-modulating modes, for voltage light-modulating mode and PWM light-modulating mode, amplifier U108A is operated in saturation region, and the output signal size of amplifier U107D depends on the voltage swing of VR1 end.For resistance light-modulating mode, amplifier U108A plays a part resistance signal linear transformation to be voltage signal and inputs the in-phase end to amplifier U107D.
As shown in Figure 10, when what light modulation of VR1 end does not connects, after the string that supply voltage VCC3 form through Q301 and ZD302 is steady, the Vcc1 voltage of generation 12.5V.The amplifier input of now U108A output 10V, U107D is 10V, and after voltage follow, the voltage connecting current reference divider resistance end is then 10V, and light fixture is fully loaded with 100% output.
For output current regulation unit, when not accessing three-in-one light adjusting circuit of the present invention, it is mainly used in the current constant of LED in some setting value, when actual current is higher compared with the electric current set, feed back to LLC resonance control chip by optocoupler U4, and then control actual current reduction with close to setting value；Otherwise in like manner.LED load electric current is only carried out feeding back constant flow regulation by the output current regulation control unit majority therefore not accessing three-in-one light adjusting circuit.And after output current regulation control unit has accessed three-in-one light adjusting circuit, just can be by regulating the size of LED load electric current so that the brightness of LED street lamp is adjusted, and realizes the light modulation to LED with this.
Finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should be contained in the middle of scope of the presently claimed invention.
Claims (10)
1. a lamp control system, including:
City's signal of telecommunication is filtered the exchange input filter unit processed；
The AC signal that described exchange input filter unit exports is converted to the rectification output filter unit of direct current signal；
The direct current signal of reception rectification output filter unit output, and carry out the Active PFC boosting unit of boost action,
Described Active PFC boosting unit is provided with PFC chip U1 and supply transformer PFC T1, it is characterised in that
Auxiliary winding one end of described supply transformer PFC T1 is connected to by commutation diode D32, the first steady module of string
The power port of PFC chip；Meanwhile, it is provided with between described exchange input filter unit and rectification output filter unit
AC fault detection unit；Described AC fault detection unit includes:
Photoelectrical coupler U800 and switching tube Q801；Wherein,
The light-emitting diodes tube anode of described photoelectrical coupler U800 is connected to the signal input of the first steady module of string through resistance R801
End, negative electrode is connected to the drain electrode of switching tube Q801；The phototriode base stage of described photoelectrical coupler U800 receives luminous two
The light that pole pipe is sent, colelctor electrode outwards draws composition AC fault detect end, grounded emitter；Described switching tube Q801
Source ground, grid is connected to rectification and voltage division unit through resistance R809, and is connected to exchange defeated by rectification and voltage division unit
Enter between filter unit and rectification output filter unit.
2. lamp control system as claimed in claim 1, it is characterised in that in AC fault detection unit, described whole
Stream partial pressure unit includes:
Commutation diode D14 and commutation diode D15, the anode of the two is respectively connecting to exchange input filter unit and rectification
Two holding wires between output filter unit, the negative electrode of the two is by the electric capacity C64 of series connection, electric capacity C65 ground connection；
It is sequentially connected in series the partial pressure unit constituted by resistance R25, resistance R26, resistance R27 and resistance R28, resistance R25's
The other end accesses commutation diode D14 and the negative electrode of commutation diode D15, and the other end of resistance R28 accesses ground；
Wherein, the grid of switching tube Q801 is accessed in one end of described resistance R809, and the other end is connected by stabilivolt ZD20
To the concatenation point between resistance R27 and resistance R28, the anode of described stabilivolt ZD20 accesses ground also by resistance R29.
3. lamp control system as claimed in claim 2, it is characterised in that in Active PFC boosting unit:
Primary side winding one end of described supply transformer PFC T1 is connected, separately with the signal output part of rectification output filter unit
The signal output constituting Active PFC boosting unit is outwards drawn in one end by diode D2, critesistor RTH1,
The first string that auxiliary winding one end of described supply transformer PFC T1 is connected by described commutation diode D32 is steady
Module includes: switching tube Q32, and the base stage of described switching tube Q32 passes through stabilivolt ZD31 ground connection, described switching tube Q32
Colelctor electrode be connected with the negative electrode of commutation diode D32 and be connected to self base stage, described switching tube by resistance R46
The emitter stage of Q32 accesses the power port of PFC chip U1 by diode D34, and at the cathode side of diode D34
It is also associated with stabilivolt ZD30 and is connected in parallel on the electric capacity C38 at stabilivolt ZD30 two ends, described stabilivolt ZD31, stabilivolt
The plus earth of ZD30；The negative electrode of described commutation diode D32 is also by electric capacity C36 ground connection.
4. lamp control system as claimed in claim 3, it is characterised in that described PFC chip U1 has for driving
The signal of dynamic external switch pipe Q1 drives port, and described signal drives and is provided with first between port and the grid of switching tube Q1
Switching tube accelerator module；The source electrode of described switching tube Q1 passes through resistance R8 ground connection, and drain electrode is connected to supply transformer PFC T1
The described other end of primary side winding.
5. lamp control system as claimed in claim 4, it is characterised in that also include being arranged on Active PFC liter
The LLC resonant converter control unit of pressure unit rear side；Described LLC resonant converter control unit includes:
LLC resonance control chip U900, it has supply port, auxiliary winding one end of described supply transformer PFC T1
Also lead to pressure point A, described pressure point A by described commutation diode D32 and be connected to described by the second steady module of string
Supply port, the described second steady module of string includes:
Switching tube Q10, its colelctor electrode is connected to pressure point A and is connected to the base stage of self by resistance R22；Its base stage
The anode being accessed ground and stabilivolt ZD10 by stabilivolt ZD10 is earth terminal；Its emitter stage by electric capacity C17 ground connection,
And access supply port by resistance J11；It is provided with electric capacity C16 between pressure point A and ground, sets between supply port and ground
It is equipped with electric capacity C60 and electric capacity C61.
6. the lamp control system stated such as claim 5, it is characterised in that described LLC resonant converter control unit is also
Including the resonance oscillation semi-bridge being made up of switching tube Q5 and switching tube Q6；Wherein,
The source electrode of described switching tube Q5 is connected with the drain electrode of described switching tube Q6 and constitutes cascaded structure and the outwards extraction of concatenation point
It is connected to a LC resonant network；
The drain electrode of described switching tube Q5 receives the voltage signal from the output of Active PFC boosting unit, and grid passes through second
Switching tube accelerator module is connected with the high-side driver output pin of LLC resonance control chip U900；
The source ground of described switching tube Q6, grid is by the 3rd switching tube accelerator module and LLC resonance control chip U900
Low side drive output pin be connected.
7. lamp control system as claimed in claim 6, it is characterised in that described LLC resonant converter control unit
Also including resonance transformer LLC T1, it has armature winding, secondary windings, primary accessory power supply winding and secondary auxiliary
Power supply winding；Wherein, described armature winding is used for constituting LC resonant network；Described secondary windings is same for connecting by two
The output rectification filter unit that step rectification control chip is constituted；Described primary accessory power supply winding for by diode D11 and
Resistance R81 is connected to pressure point A；Described secondary accessory power supply winding can make light fixture control for being produced by the 3rd steady module of string
The supply voltage VCC3 that the output voltage/electric current regulation unit of system processed normally works.
8. the lamp control system stated such as claim 7, it is characterised in that described 3rd go here and there steady module include audion Q200,
Stabilivolt ZD200 and resistance R200；One end ground connection SGND of described secondary accessory power supply winding, the other end passes through two poles
Pipe D200, resistance R203 access the colelctor electrode of audion Q200；The negative electrode of described stabilivolt ZD200 and audion Q200
Base stage be connected, plus earth SGND；The two ends of described resistance R200 be respectively connecting to audion Q200 colelctor electrode and
Base stage；The emitter stage of described audion Q200 exports described supply voltage VCC3.
9. the lamp control system stated such as claim 8, it is characterised in that also include DC fault detection unit；
Described DC fault detection unit includes:
Switching tube Q802, its drain electrode outwards extraction constitutes DC fault detect end, and source ground, grid is connected to by resistance
The partial pressure unit that R804, stabilivolt ZD800 and resistance R802 are in series, one end of resistance R804 is whole from described output
Stream filter unit obtains DC voltage, and the other end of resistance R804 is connected to the negative electrode of stabilivolt ZD800, resistance R802
One end be connected with the anode of stabilivolt ZD800, the other end ground connection of resistance R802, the grid of described switching tube Q802
It is connected to the anode of stabilivolt ZD800；Meanwhile, the described other end of resistance R804 is also through resistance R803 ground connection.
10. the lamp control system stated such as claim 9, it is characterised in that described first switching tube accelerator module, second
Switching tube accelerator module and the 3rd switching tube accelerator module are by the first stabilivolt, the first diode, the first resistance, the second electricity
Resistance, the 3rd resistance and the first switching tube are constituted；
Wherein, the base stage of the negative electrode of the first stabilivolt, the anode of the first diode and the first switching tube is commonly connected to corresponding core
The corresponding port of sheet, the plus earth of the first stabilivolt, the negative electrode of the first diode is by the first resistance and switching tube to be driven
Grid be connected, the emitter stage of the first switching tube is connected with the grid of switching tube to be driven by the second resistance, the first switching tube
Colelctor electrode be connected to the source electrode of switching tube to be driven；3rd resistance is connected between grid and the source electrode of switching tube to be driven.
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| CN107166347A (en) * | 2017-06-30 | 2017-09-15 | 上海唯源光电科技有限公司 | It is a kind of that there is the light fixture for aiding in sleep function |
| CN108196184A (en) * | 2018-01-25 | 2018-06-22 | 昆明理工大学 | A kind of XL series boost chip detection device and method |
| CN108401312A (en) * | 2017-02-07 | 2018-08-14 | 常州星宇车灯股份有限公司 | A kind of LED driving control systems |
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| CN108196184A (en) * | 2018-01-25 | 2018-06-22 | 昆明理工大学 | A kind of XL series boost chip detection device and method |
| CN108196184B (en) * | 2018-01-25 | 2023-06-20 | 昆明理工大学 | XL series boost chip detection device and method |
| CN109521828A (en) * | 2018-12-29 | 2019-03-26 | 惠州华科电器有限公司 | Linear voltage-stabilizing circuit |
| CN109831846A (en) * | 2019-02-20 | 2019-05-31 | 江苏科谷电子有限公司 | A kind of LCC route adds LEDset2.0 can setting electric current route |
| CN110461070A (en) * | 2019-09-10 | 2019-11-15 | 深圳爱克莱特科技股份有限公司 | LED lamp and its energy supply control module |
| CN114900919B (en) * | 2022-04-12 | 2023-09-26 | 杭州云正科技有限公司 | Fault active alarming traffic signal lamp based on self-checking function |
| CN114900919A (en) * | 2022-04-12 | 2022-08-12 | 杭州云正科技有限公司 | Fault active alarm traffic signal lamp based on driving chip with self-checking function |
| CN115622378B (en) * | 2022-12-06 | 2023-03-28 | 眉山博雅新材料股份有限公司 | High-frequency power supply and direct-current voltage stabilizing device applied to high-frequency power supply |
| CN115622378A (en) * | 2022-12-06 | 2023-01-17 | 眉山博雅新材料股份有限公司 | High-frequency power supply and direct-current voltage stabilizing device applied to high-frequency power supply |
| CN117518020A (en) * | 2023-12-28 | 2024-02-06 | 杭州方千科技有限公司 | Traffic signal lamp fault detection system and traffic signal device |
| CN117518020B (en) * | 2023-12-28 | 2024-03-19 | 杭州方千科技有限公司 | Traffic signal lamp fault detection system and traffic signal device |
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