CN104302080A - Automobile xenon lamp variable frequency decoder - Google Patents
Automobile xenon lamp variable frequency decoder Download PDFInfo
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- CN104302080A CN104302080A CN201410613084.6A CN201410613084A CN104302080A CN 104302080 A CN104302080 A CN 104302080A CN 201410613084 A CN201410613084 A CN 201410613084A CN 104302080 A CN104302080 A CN 104302080A
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Abstract
The invention relates to an automobile xenon lamp variable frequency decoder. The automobile xenon lamp variable frequency decoder comprises a power circuit, a control circuit, an automobile storage battery auxiliary power supply circuit and a hybrid power supply circuit. The power circuit is connected to an automobile lamp power supply circuit. The control circuit controls the power circuit to output currents and voltages to the hybrid power supply circuit. The automobile storage battery auxiliary power supply circuit is connected to an automobile storage battery. The control circuit controls the automobile storage battery auxiliary power supply circuit to output currents and voltages to the hybrid power supply circuit. The hybrid power supply circuit supplies power to xenon lamps after being subjected to rectifying and filtering. By the adoption of the automobile xenon lamp variable frequency decoder, energy can be directly supplied to the xenon lamps for working; with respect to the insufficient current part, the variable frequency decoder supplies sufficient currents to the xenon lamps for working through the hybrid power supply circuit by being connected with the positive pole and the negative pole of the automobile storage battery, so that the positive pole and the negative pole are turned on and turned off to control all headlamps of automobiles to pass detection.
Description
Technical field
The present invention relates to decoder, especially connect the frequency conversion decoder of automobile xenon lamp.
Background technology
Developing rapidly of current electronic technology, increasing automobile all have employed intelligent car running computer CANBUS agreement.Headlight is all with light measure loop, the power supply being input to halogen regenerative-cycle headlamp have employed 50Hz-200Hz square wave pulse width modulation signal, with power detection loop, current anomaly then instrument desk breaks down code, cut off headlight current supply circuit, order is installed xenon lamp and is not installed failure by headlight measure loop.According to the vehicle characteristics using CANBUS agreement, arise at the historic moment automobile xenon lamp decoder product in market, and currently available technology decoding circuit is:
As shown in Figure 1, by 5 Ω dummy resistance simulation Halogen lamp LED electric currents, make the detection of car running computer be passed through, then supply xenon lamp work by line group from car battery electricity-taking.This equivalent electric circuit advantage is that decoding percent of pass is high, and xenon lamp toggle speed is fast.But power in the periodic waveform of input at headlight, shortcoming is that 5 Ω resistance dummy loads waste tens watts of power, heating is serious, has vehicle spontaneous combustion dangerous.
As shown in Figure 2, the second prior art decoding circuit is: substitute car light with dummy resistance circuit, is powered to xenon lamp work by the large electrochemical capacitor filtering of 4700uF-20000uF.This decoding circuit shortcoming be due to former car headlight line powering (current limliting 5A-6A) to xenon lamp work, limit xenon lamp need about 10A big current toggle speed just meet xenon lamp start international standard.And large electrochemical capacitor starts the super stream of transient state, very easily damages car running computer module, also order is fitted through car rate and greatly reduces, and can not adapt to all CANBUS agreement vehicles and install.
Summary of the invention
Object of the present invention, overcomes the deficiencies in the prior art exactly, provides a kind of and is not enough to the frequency conversion decoder of the automobile xenon lamp of xenon lamp work by car battery solution headlight line powering.
In order to achieve the above object, following technical scheme is adopted:
Automobile xenon lamp frequency conversion decoder, comprises power circuit 1, control circuit 2, automobile battery auxiliary power supply circuit 3 and AC-battery power source power supply circuits 4; Described power circuit 1 is connected to car light supply line, and described control circuit 2 controls described power circuit 1 output current voltage to described AC-battery power source power supply circuits 4; Described automobile battery auxiliary power supply circuit 3 is connected to car battery, and described control circuit 2 controls described automobile battery auxiliary power supply circuit 3 output current voltage to AC-battery power source power supply circuits 4; Described AC-battery power source power supply circuits 4 after over commutation and filtering for xenon lamp is powered.
Further, described power circuit 1 comprises switching power circuit 11 and electronic switching circuit 12; Described switching power circuit 11 is connected to car light supply line, and described control circuit 2 controls described switching power circuit 11 by described electronic switching circuit 12 and is connected with the break-make of car light supply line.
Further, in order to entirely simulate Halogen lamp LED operating current, meet all CANBUS agreement vehicles to install, described power circuit 1 also comprises is located at electronic switch between switching power circuit 11, car light supply line and reverse-connection preventing circuit 13, and power supply circuits 14 and car light detect load circuit 15; Described power supply circuits 14 are connected to car light supply line, and the control voltage of described electronic switch and reverse-connection preventing circuit 13 receiving key power circuit 11 controls it and car light supply line forms the loop that is turned on or off.
Further, described electronic switch and reverse-connection preventing circuit 13 comprise metal-oxide-semiconductor Q1, one end is connected to the resistance R2 that switching power circuit 11 receives control voltage, the other end is connected to metal-oxide-semiconductor Q1 grid, one end ground connection, the other end are connected to the resistance R3 of metal-oxide-semiconductor Q1 grid, the source ground of described metal-oxide-semiconductor Q1, drain electrode is connected to the negative pole of power supply circuits 14;
Described power supply circuits 14 comprise transformer T2, the drain electrode that one winding one end is connected to car light supply line negative pole, the other end is connected to metal-oxide-semiconductor Q1, another winding one end is connected to car light supply line positive pole, the other end accesses switching power circuit 11 by inductance L 1;
Described control circuit 2 comprises control chip IC1, triode Q10, the diode D4 that negative pole is connected with the collector electrode of triode Q10, the resistance R41 connected with the positive pole of diode D4, and the other end of described resistance R41 is connected to the positive pole of power supply circuits 14; Also comprise plus earth, voltage stabilizing didoe Z1 that negative pole is connected to triode Q10 base stage, two ends are connected to the resistance R26 of triode Q10 base stage and collector electrode respectively, the electric capacity C17 of one end connecting triode Q10 emitter, other end ground connection, the emitter of triode Q10 is connected with control chip IC1;
Described electronic switching circuit 12 comprises triode Q9, triode Q8, resistance R34 and resistance R33; The grounded emitter of described triode Q9, base stage is connected to automobile battery auxiliary power supply circuit 3, collector electrode is connected to the base stage of triode Q8 by resistance R34, the emitter of resistance R33 two ends difference connecting triode Q8 and base stage, the emitter of triode Q8 accesses the positive pole of described power supply circuits 14, collector electrode is connected with switching power circuit 11, and described control chip IC1 outputs control signals to the base stage of automobile battery auxiliary power supply circuit 3 and triode Q9;
Described car light detects load circuit 15 and comprises resistance R23 and metal-oxide-semiconductor Q6, the positive pole of described resistance R23 one end access power supply circuits 14, and the other end is connected with the drain electrode of metal-oxide-semiconductor Q6, the source ground of described metal-oxide-semiconductor; Comprise the resistance R24 and resistance R25 that are sequentially connected in series, described resistance R25 ground connection, resistance R24 is connected with the grid of metal-oxide-semiconductor Q6 with the link of resistance R25; Comprise triode Q7, its grounded emitter, collector electrode is connected to the link of resistance R24 and resistance R25, and base stage is connected to control chip IC1 by resistance R30, the resistance R29 connected successively; Comprise resistance R28, its one end is connected to the link of resistance R30 and resistance R29, other end ground connection; Comprise electric capacity C18, its one end is connected to the link of resistance R30 and resistance R29, other end ground connection; Comprise resistance R27, its one end is connected to the link of resistance R30 and resistance R29, and the other end is connected to the positive pole of power supply circuits 14; Comprise diode Z2, its plus earth, negative pole is connected to the collector electrode of triode Q7.
Further, described power circuit 1 also comprises current constant control Circuit tuning 16 and light-coupled isolation output voltage detecting circuit 17, and electric 16 tunnels of described current constant control adjustment, to switching power circuit 11 clamper, control its continuous current working point; Described light-coupled isolation output voltage detecting circuit 17 one end is connected to described switching power circuit 11, and the other end is connected to the output of described AC-battery power source power supply circuits 4, adjusts described switching power circuit 11 and exports constant voltage.
Further, also comprise time delay discharge loop 5, it comprises the diode D11, diode D8, electric capacity C28 and the resistance R40 that are connected in series, described diode D11 negative pole is connected with the positive pole of diode D8, the negative pole of described diode D11 is by electric capacity C28 ground connection, the positive pole of described diode D11 is connected to the positive pole of power supply circuits, and the negative pole of described diode D8 is connected to the grid of metal-oxide-semiconductor Q6 by resistance R40.
Further, also comprise time delay power supply circuits 6, it comprises the resistance R35, diode D10, the diode D5 that are sequentially connected in series, the negative pole of described diode D10 is connected with the positive pole of diode D5, the negative pole of described diode D5 is connected to the negative pole of diode D4, the other end of described resistance R35 is connected to the collector electrode of triode Q8, also comprises an end and receives diode D10 negative pole, the resistance R36 of other end ground connection and the electric capacity C16 in parallel with resistance R36.
Further, described switching power circuit 11 comprises transformer T1, and another winding one end of described transformer T2 is connected to car light supply line positive pole, the other end access transformer T1 primary coil by inductance L 1; Also comprise and inhale spike circuit 7, it comprises diode D6 and the electric capacity C6 at the primary coil two ends being connected in series in transformer T1, and negative pole is connected to the diode D7 of diode D6 and electric capacity C6 link, and the positive pole of diode D7 is connected to switching power circuit 11.
Further, described AC-battery power source power supply circuits 4 comprise diode D2 and diode D9, the positive pole of described diode D2 is connected with power circuit 1, the positive pole of described diode D9 is connected with automobile battery auxiliary power supply circuit 3, the negative pole of described diode D2 and the negative pole of diode D9 are connected to positive output end jointly, negative output terminal ground connection, is parallel with electric capacity C7, electric capacity C27 and electric capacity C24 between positive and negative output.
Further, described automobile battery auxiliary power supply circuit 3 comprises optocoupler control chip IC3, and it is connected to the base stage of triode Q9 by resistance R22; Metal-oxide-semiconductor Q3, its drain electrode is connected to the positive pole of diode D9, and source electrode is connected with vehicle-mounted charge anode, and grid is connected to optocoupler control chip IC3 by resistance R5; Be connected in parallel on metal-oxide-semiconductor Q3 to drain and connect the grid of metal-oxide-semiconductor Q3 with the resistance R4 of grid and the positive pole of voltage stabilizing didoe Z3, described voltage stabilizing didoe Z3; Photo resistance RV1 one end is connected to the source electrode of metal-oxide-semiconductor Q3, other end ground connection.
Compared with prior art, beneficial effect of the present invention is:
The energy is directly supplied xenon lamp work by the present invention, not enough current segment, and by connecing car battery plus-negative plate, with the enough current works of AC-battery power source circuit supply xenon lamp, making positive pole, negative switch control headlight vehicle can pass through.
In addition, owing to entirely simulating Halogen lamp LED operating current, meet all CANBUS agreement vehicles and install, xenon lamp deficiency current segment, by car powered battery, makes xenon lamp priming speed reach genuine xenon lamp priming speed, meets priming speed international standard.Full simulation Halogen lamp LED electric energy more than 85% efficiency for giving xenon lamp work, save and to decode the energy wasted with 5 Ω dummy resistances, energy-saving significance is large.
Accompanying drawing explanation
Fig. 1 is equivalent circuit theory and the Waveform Input output map of the first prior art;
Fig. 2 is equivalent circuit theory and the Waveform Input output map of the second prior art;
Fig. 3 is circuit general diagram of the present invention;
Fig. 4 is the equivalent circuit theory figure of Fig. 3;
Fig. 5 is the concrete block diagram of automobile xenon lamp frequency conversion decoder circuit of the present invention.
Fig. 6 is the circuit diagram of automobile xenon lamp frequency conversion decoder of the present invention.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific implementation method, be used for explaining the present invention in exemplary embodiment and description of the present invention, but not as a limitation of the invention.
As shown in Figure 3, automobile xenon lamp frequency conversion decoder of the present invention comprises power circuit 1, control circuit 2, automobile battery auxiliary power supply circuit 3 and AC-battery power source power supply circuits 4.Power circuit 1 is connected to car light supply line, obtains the power supply of car headlight from car light supply line, and described automobile battery auxiliary power supply circuit 3 is connected to car battery, from car battery, obtain power supply.Control circuit 2 controls power circuit 1 output current voltage to described AC-battery power source power supply circuits 4 according to the situation of power circuit 1, control automobile battery auxiliary power supply circuit 3 output current voltage to AC-battery power source power supply circuits 4, for xenon lamp is powered after eventually passing the rectification of AC-battery power source power supply circuits 4 and filtering simultaneously.
Fig. 4 is the equivalent circuit theory figure of Fig. 3.The control point that switch equivalent in Fig. 4 controls in control circuit, closes by controlling equivalent switch or disconnects, realizing two kinds of functions of automobile xenon lamp frequency conversion decoder of the present invention.One is when automobile front lamp is not opened, and the power supply being input to halogen regenerative-cycle headlamp have employed 50Hz-200Hz square wave pulse width modulation signal, whether is in normal condition with inspection vehicle headlight.When at this time needing square wave pulse width modulation signal to be detected, the switch of the branch road being connected with resistance is closed conducting, with reach make vehicle control system think automobile front lamp loop is for normal condition.Another kind is when needing to open automobile front lamp, now need to be powered to xenon lamp by transformer, the switch of transformer of input circuit of now needing connecting headlamp to power closes and disconnects the branch road with resistance, and adopt car battery as auxiliary electric power supply according to the electric power thus supplied of reality, make xenon lamp start fast and maintain normal work.
Fig. 5 is the concrete block diagram of automobile xenon lamp frequency conversion decoder circuit of the present invention.Automobile xenon lamp frequency conversion decoder of the present invention has circuit modules all in Fig. 5 or circuit unit.Power circuit 1 comprises switching power circuit 11 and electronic switching circuit 12.Wherein, switching power circuit 11 is connected with car light supply line, obtains the electric energy of car light supply line.Control circuit 2 is connected with cutting out with the conducting of car light supply line by electronic switching circuit 12 control switch power circuit 11.Power circuit 1 also comprises is located at electronic switch between switching power circuit 11, car light supply line and reverse-connection preventing circuit 13, and power supply circuits 14 and car light detect load circuit 15.Power supply circuits 14 are connected to car light supply line, the control voltage of electronic switch and reverse-connection preventing circuit 13 receiving key power circuit 11 controls itself and car light supply line and is formed and be turned on or off loop and play anti-reverse function, avoids the problem inputting the circuit burnout that wrong causes.The effect of electronic switch and reverse-connection preventing circuit 13 is equivalent to the resistance branch in Fig. 4.By the control of switching power circuit 11, formation or the disconnection of electronic switch and reverse-connection preventing circuit 13 and power supply circuits can be controlled.
Power circuit 1 also comprises current constant control Circuit tuning 16 and light-coupled isolation output voltage detecting circuit 17.Electric 16 tunnels of current constant control adjustment to switching power circuit 11 clamper, and control its continuous current working point.Light-coupled isolation output voltage detecting circuit 17 one end is connected to switching power circuit 11, and the other end is connected to the output of AC-battery power source power supply circuits 4, adjusts described switching power circuit 11 and exports constant voltage.
Power circuit 1 also comprises time delay discharge loop 5 and time delay power supply circuits 6.Time delay discharge loop 5 and car light detect load circuit and connect, its short pulse sent at car light circuit by the transition of rising edge trailing edge in, the load circuit time delay that connects is detected to car light and powers, make car light detect load circuit and work on.Time delay power supply circuits 6 are powered to control circuit 2 time delay when electronic switching circuit 12 is opened, and cannot charge, can not power to control circuit 2 time delay when electronic switching circuit 12 is closed.Power circuit 1 also comprises inhales spike circuit 7, the residual voltage that disappears loop 8 and superpressure shutdown detecting circuit 9.Inhale spike circuit 7 and reduce the switch spike that flyback encourages power work generation.The electricity of the capacitor charging in power supply circuits 14 clearly can be put in the residual voltage that disappears loop 8, makes switching power circuit 11 complete reset.Superpressure shutdown detecting circuit 9 can form overvoltage protection to control circuit 2.
As shown in Figure 6, automobile xenon lamp of the present invention opens decoder circuit, and it is used for car light signal break-make detects mainly through resistance R23, metal-oxide-semiconductor Q6, triode Q7, metal-oxide-semiconductor Q1 loop, and lamp loop is normal to allow vehicle control judge.During driving lamp, powering to xenon lamp by forming constant pressure and flow by control chip IC1, transformer T1, metal-oxide-semiconductor Q2, control chip IC2, diode D2, triode Q8 and triode Q9, forming loop to xenon lamp auxiliary power supply by control chip IC1, optocoupler control chip IC3, metal-oxide-semiconductor Q3, diode D9.Power circuit 1 simulates Halogen lamp LED operating current, supplements not enough electric currents, make xenon lamp priming speed meet international standard by car battery auxiliary power supply circuit.
In Fig. 6, AC-battery power source power supply circuits 4 comprise diode D2 and diode D9.The positive pole of diode D2 is connected with the secondary coil of the transformer T1 of power circuit 1.The positive pole of diode D9 is connected to the drain electrode of the metal-oxide-semiconductor Q3 of automobile battery auxiliary power supply circuit 3.The negative pole of diode D2 and the negative pole of diode D9 are connected to positive output end OUT+ jointly, and negative output terminal OUT-ground connection is parallel with electric capacity C7, electric capacity C27 and electric capacity C24 between positive and negative output.
Electronic switch and reverse-connection preventing circuit 13 comprise metal-oxide-semiconductor Q1, and its drain electrode is connected to a winding of transformer T2.Source ground, grid, by resistance R3 ground connection, is connected to 8 pin of control chip IC2 by resistance R2.
The drain electrode that one winding one end is connected to car light supply line negative pole IN-, the other end is connected to metal-oxide-semiconductor Q1 of the transformer T2 of power supply circuits 14; Another winding one end is connected to car light supply line positive pole IN+, the other end access switching power circuit 11 transformer T1 by inductance L 1.Piezo-resistance RV2 is provided with, electric capacity C2, electric capacity C3 between two windings of transformer T2.Electric capacity C4, electric capacity C5 mono-end receive V1 point, other end ground connection.The electric capacity C20 be connected in parallel, electric capacity C21, electric capacity C22 and electric capacity C23, electric capacity C20, electric capacity C21, electric capacity C22 and electric capacity C23 are altogether.
Control circuit 2 comprises control chip IC1, triode Q10, the diode D4 that negative pole is connected with the collector electrode of triode Q10, the resistance R41 connected with the positive pole of diode D4, and the other end of resistance R41 is connected to the positive pole of power supply circuits 14.Also comprise plus earth, voltage stabilizing didoe Z1 that negative pole is connected to triode Q10 base stage, two ends are connected to the resistance R26 of triode Q10 base stage and collector electrode respectively, the electric capacity C17 of one end connecting triode Q10 emitter, other end ground connection, the emitter of triode Q10 is connected with 5 pin of control chip IC1.
Electronic switching circuit 12 comprises triode Q9, triode Q8, resistance R34 and resistance R33.The grounded emitter of triode Q9, base stage is connected to the resistance R22 of automobile battery auxiliary power supply circuit 3, and collector electrode is connected to the base stage of triode Q8 by resistance R34.The emitter of resistance R33 two ends difference connecting triode Q8 and base stage, V1 point, the collector electrode of the emitter access power supply circuits 14 of triode Q8 are connected with 7 pin of the control chip IC2 of switching power circuit 11, and control chip IC1 outputs control signals to the base stage of automobile battery auxiliary power supply circuit 3 and triode Q9.
Car light detects load circuit 15 and comprises resistance R23 and metal-oxide-semiconductor Q6.The V1 point of resistance R23 one end access power supply circuits 14, V1 point connects with the positive pole IN+ of power supply circuits, and the other end is connected with the drain electrode of metal-oxide-semiconductor Q6.The source ground of metal-oxide-semiconductor.Also comprise the resistance R24 and resistance R25 that are sequentially connected in series.Resistance R25 ground connection, resistance R24 is connected with the grid of metal-oxide-semiconductor Q6 with the link of resistance R25.The grounded emitter of triode Q7, collector electrode is connected to the link of resistance R24 and resistance R25, and base stage is connected to control chip IC1 by resistance R30, the resistance R29 connected successively.Resistance R28 one end is connected to the link of resistance R30 and resistance R29, other end ground connection.Electric capacity C18 one end is connected to the link of resistance R30 and resistance R29, other end ground connection.Resistance R27 one end is connected to the link of resistance R30 and resistance R29, and the other end is connected to V1 point.The plus earth of voltage stabilizing didoe Z2, negative pole is connected to the collector electrode of triode Q7.
Time delay discharge loop 5 comprises the diode D11, diode D8, electric capacity C28 and the resistance R40 that are connected in series.Diode D11 negative pole is connected with the positive pole of diode D8.The negative pole of diode D11 is by electric capacity C28 ground connection.The positive pole of diode D11 is connected to the positive pole of power supply circuits.The negative pole of diode D8 is connected to the grid of metal-oxide-semiconductor Q6 by resistance R40.
Time delay power supply circuits 6 comprise the resistance R35, diode D10, the diode D5 that are sequentially connected in series.The negative pole of diode D10 is connected with the positive pole of diode D5.The negative pole of diode D5 is connected to the negative pole of diode D4.The other end of resistance R35 is connected to the collector electrode of triode Q8.Also comprise an end and receive diode D10 negative pole, the resistance R36 of other end ground connection and the electric capacity C16 in parallel with resistance R36.
Switching power circuit 11 comprises transformer T1, and its secondary coil one end ground connection, the other end is connected to diode D2.Another winding one end of transformer T2 is connected to car light supply line positive pole, the other end access transformer T1 primary coil by inductance L 1.Also comprise control chip IC2, its 7 pin is connected to the collector electrode of triode Q8 by resistance R0, and by electric capacity C8 ground connection, 8 pin export 5V voltage, 6 pin are connected to the grid of metal-oxide-semiconductor Q2 by resistance R6, diode D3, and 5 pin ground connection, 4 pin are connected to the base stage of triode Q5.Physical circuit annexation please see Figure the connection of the electronic device in the empty frame 11 of 6.
Inhale diode D6 and electric capacity C6 that spike circuit 7 comprises the primary coil two ends being connected in series in transformer T1, negative pole is connected to the diode D7 of diode D6 and electric capacity C6 link, and the positive pole of diode D7 is connected to switching power circuit 11.
The optocoupler control chip IC3 of automobile battery auxiliary power supply circuit 3 is connected to the base stage of triode Q9 by resistance R22.The drain electrode of metal-oxide-semiconductor Q3 is connected to the positive pole of diode D9, and source electrode is connected with vehicle-mounted charge anode, and grid is connected to optocoupler control chip IC3 by resistance R5.Be connected in parallel on metal-oxide-semiconductor Q3 to drain and connect the grid of metal-oxide-semiconductor Q3 with the resistance R4 of grid and the positive pole of voltage stabilizing didoe Z3, voltage stabilizing didoe Z3.Photo resistance RV1 one end is connected to the source electrode of metal-oxide-semiconductor Q3, other end ground connection.
In Fig. 6, circuit diagram operation principle is: when car light circuit send short pulse detect vehicle light circuit whether normal signal time, circuit loop by the source electrode of IN+, FAST2 fuse of power supply circuits, transformer T2, resistance R23, metal-oxide-semiconductor Q6 to drain electrode, by resistance R24 for the grid conducting metal-oxide-semiconductor Q6, make the source electrode of metal-oxide-semiconductor Q6 and drain electrode conducting, then form dummy load unidirectional circuit through the IN-of metal-oxide-semiconductor Q1 internal body diodes, power supply circuits.When short pulse is in rising edge, by resistance R41, diode D4, the filter circuit of pressure-stabilizing be made up of triode Q10, resistance R26, voltage-stabiliser tube Z1, electric capacity C17 is powered to 5 pin to 2 pin of control chip IC1.The 1 pin output low level of control chip IC1, by resistance R29, resistance R30, the base stage of triode Q7 is placed in low level, triode Q7 does not have base bias, not conducting between its collector electrode and emitter.Under the effect of V1, the smooth conducting of metal-oxide-semiconductor Q6.6 pin of control chip IC1 set low level, and closed by the electronic switching circuit 12 that triode Q9, resistance R34, resistance R33, triode Q8 are formed, make the control chip IC2 of switching power circuit 11 not work, then 8 pin of control chip IC2 do not have 5V to export.Now the grid of metal-oxide-semiconductor Q1 does not have operating voltage, is in closed condition.The electronic switching circuit formed due to triode Q9, resistance R34, resistance R33, triode Q8 is closed, and also makes the time delay power supply circuits be made up of resistance R35, diode D5, diode D10, resistance R36, electric capacity C16 charge.Thus can not power to control chip IC1 time delay.6 pin due to control chip IC1 are low level, also make and are formed switching circuit closed by resistance R22, electric capacity C26, optocoupler control chip IC3, resistance R5, resistance R4, voltage stabilizing didoe Z3, metal-oxide-semiconductor Q3, do not worked by battery Bat+ auxiliary power supply.
When car light detects pulse disappearance, the electric capacity C17 of control circuit 2 can only provide Millisecond electric energy for control chip IC1 work, makes it reset rapidly, to wait for next pulse signal.Repeat principle above, complete headlight input.
When short pulse is excessive to trailing edge by rising edge, is formed time delay discharge loop powered to the grid of metal-oxide-semiconductor Q6 by diode D8, diode D11, electric capacity C28, resistance R40, make the source electrode of metal-oxide-semiconductor Q6 continue conducting with drain electrode.The tele-release of electric capacity C4, electric capacity C5, electric capacity C20, electric capacity C21, electric capacity C22, electric capacity C23 being filled by resistance R23 is clear.Because metal-oxide-semiconductor Q1 internal body diodes has 0.7V pressure drop, the electricity that electric capacity C2, electric capacity C3 fill is put clearly by the resistance R1 in the residual voltage loop that disappears.
When short pulse drops to low level, control chip IC1 can only provide Millisecond to power due to electric capacity C17, and control chip IC1 also power-off restoration immediately, completes circuit reset.When next headlight short pulse comes again, repeat operation principle above and complete headlight input.
If when car light signal is turned on light and is in high level continuously, namely the square wave pulse width signal high level of power supply circuits 14 is inputted, then control chip IC1 not power-off, detect the burst length (being less than 5ms) by the time delay of control chip IC1 in house software to being greater than car light, control IC1 controls 1 pin and exports high level.Powered to the base stage of triode Q7 by resistance R29, resistance R30, conducting between the collector electrode of triode Q7 and emitter, sets low level by the grid of metal-oxide-semiconductor Q6, closes resistance R23 dummy resistance loop.Meanwhile, form delay protection loop when control chip IC1 damages by resistance R27, resistance R28, electric capacity C18, by triode Q7 conducting, thus turn off metal-oxide-semiconductor Q6, make resistance R23 can only be operated in Millisecond scope, prevent resistance R23 long term overloading from burning.3 pin of control chip IC1 are by connecting resistance R31, the resistance R32 of V1, the superpressure shutdown detecting circuit of electric capacity C19 formation, and when the 3 foot valve values of control chip IC1 are low level, then control chip IC1 works.When the 3 foot valve values of control chip IC1 are high level, its 6 pin is low level, makes superpressure shutdown detecting circuit not work.6 pin are set high level by control IC1 simultaneously, by the electronic switching circuit conducting be made up of triode Q9, diode R34, diode R33, triode Q8.Now control chip IC2 obtains by car light circuit supply pressure, and control chip IC2 works.And provide pulse width signal by 6 pin of control chip IC2, the grid of metal-oxide-semiconductor Q2 is controlled by resistance R6, diode D3, triode Q4, the flyback sourse be made up of metal-oxide-semiconductor Q2, transformer T1, by high frequency transformer T1 isolation coupling, by the electric capacity C6 one end being connected to metal-oxide-semiconductor Q2 source electrode, the other end connects diode D6 positive pole, diode D7 negative pole.Diode D6 negative pole is connected to the transformer T1 other end, and diode D7 positive pole connects metal-oxide-semiconductor Q2 drain electrode, and the suction spike circuit of formation reduces the switch spike that flyback sourse work produces.Power to xenon lamp by after the diode D2 rectification of AC-battery power source power supply circuits, electric capacity C7, electric capacity C27, electric capacity C24 filtering.
By the switched-current sampled resistance being connected on resistance R7, resistance R8, resistance R9, resistance R10 that metal-oxide-semiconductor Q2 drains and forming, 3 pin of control chip IC2 are sent into by resistance R12, electric capacity C10 filtering, form by triode Q5, resistance R42, resistance R43, resistance R16 the 3 pin level that slope-compensation raises control chip IC2 and mix the 3 pin level meeting and controls control chip IC2 with resistance R7, resistance R8, resistance R9, resistance R10 level, the minimizing of the design resistance of resistance R7, resistance R8, resistance R9, resistance R10 is reduced the wastage.
Control output current by 3 pin of control IC2, make its output constant current.Be attempted by 1 of control chip IC2, electric capacity C11, resistance R13 between 2 pin, electric capacity C13, resistance R14 form control chip IC2 Gain tuning and low-and high-frequency decoupling, make control chip IC2 working stability.The 1 pin voltage clamping to control chip IC2 be made up of diode D1, resistance R18, resistance R38, resistance R39, changes the 3 pin current detecting threshold values of control chip IC2, thus adjusting resistance R39 resistance controls control chip IC2 continuous current working point.
Received by resistance R15 and export OUT+, resistance R19, resistance R37, electric capacity R11 and access optocoupler control chip IC4 one end, detect voltages by 2 pin that the optocoupler control chip IC4 other end is connected to resistance R20, resistance R21, electric capacity C15 supplies control chip IC2 and complete constant voltage output.
6 pin of control chip IC1 connect the base stage and automobile battery auxiliary power supply circuit of receiving triode Q9 respectively.By 1,2 pin of resistance R22, electric capacity C26, optocoupler control chip IC3, make 3,4 pin conductings.By resistance R5, resistance R4, voltage stabilizing didoe Z3, the grid level of metal-oxide-semiconductor Q3 is dragged down, then conducting between metal-oxide-semiconductor Q3 source electrode, drain electrode.Car cell voltage electric current passes through Bat+ entrance, metal-oxide-semiconductor Q3, diode D9, Bat-to xenon lamp auxiliary power supply.
When the car light square wave pulse width signal that positive pole IN+, the negative pole IN-of power supply circuits input is in low level, during due to car light square wave pulse width signal high level, by resistance R35, diode D10, electric capacity C16 is charged, now control chip IC1 works on, 6 pin of control chip IC1 continue to set high level, continue conducting by car powered battery Bat+ to metal-oxide-semiconductor Q3, car battery auxiliary power supply maintains xenon lamp work.Because power supply circuits positive pole IN+, negative pole IN-two ends are in low level, control chip IC2 can not get voltage and current and closes, no-output.Powered to control IC1 time delay by electric capacity C16, diode D5, resistance R26, triode Q10, voltage stabilizing didoe Z1, electric capacity C17.Because control chip IC2 does not work, its 8 pin exports without 5V, and 4 pin of control chip IC1 are low level.When next car light square wave pulse width signal is at high level, control chip IC2 obtains electric current and voltage and reworks, and continues power supply by diode D2 to xenon lamp.Because the square wave frequency of different automobile types is different, be generally 50Hz-200Hz, by electric capacity C16 time delay power be greater than the square wave of 30Hz to control chip IC1 time, then control chip IC1 not power-off, its 6 pin continues to set high level, and resistance switch circuit 12 is in conducting state.When again there is high level by power supply circuits positive pole IN+, negative pole IN-in the car light pulse width signal being greater than 30Hz, automatically follow outside square wave frequency by control chip IC2, be generally 50Hz-200Hz, automatically adapt to work, i.e. automatic frequency-conversion, to keep consistent with former car signal frequency.Repeat principle switch above.When the outside square wave frequency of power supply circuits positive pole IN+, negative pole IN-is less than 30Hz or is in low level continuously, control chip IC2 does not work, then its 8 pin does not have 5V to export, and 4 pin of control chip IC1 are low level.30Hz is less than by the outside square wave frequency of control chip IC1 delay judgement, then 6 pin of control chip IC1 are set low level, electronic switching circuit 12 and automobile battery auxiliary power supply circuit 3 are all closed, electric capacity C16 time delay is discharged to the operating voltage lower than control chip IC1, control chip IC1 resets, circuit does not work, and completes decoding function.
The anti-reverse principle of metal-oxide-semiconductor Q1 is: when power supply circuits negative pole IN-is just, positive pole IN+ is for time negative, and the grid of metal-oxide-semiconductor Q1 does not have driving voltage, ends not conducting, play anti-reverse effect between metal-oxide-semiconductor Q1 source electrode and drain electrode.
Thermal Cutoffs FAST1, Thermal Cutoffs FAST2, photo resistance RV1, piezo-resistance RV2 are for inputting overload, superpressure, overtemperature prote.Piezo-resistance RV3 is used for the inner negative pole of connecting circuit and decoder shell, prevents electrostatic, internal circuit damages by high pressure.
Above the technical scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and execution mode, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, embodiment and range of application all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. an automobile xenon lamp frequency conversion decoder, comprises power circuit (1), control circuit (2), automobile battery auxiliary power supply circuit (3) and AC-battery power source power supply circuits (4), it is characterized in that:
Described power circuit (1) is connected to car light supply line, and described control circuit (2) controls described power circuit (1) output current voltage to described AC-battery power source power supply circuits (4);
Described automobile battery auxiliary power supply circuit (3) is connected to car battery, and described control circuit (2) controls described automobile battery auxiliary power supply circuit (3) output current voltage to AC-battery power source power supply circuits (4);
Described AC-battery power source power supply circuits (4) after over commutation and filtering for xenon lamp is powered.
2. automobile xenon lamp frequency conversion decoder according to claim 1, is characterized in that: described power circuit (1) comprises switching power circuit (11) and electronic switching circuit (12); Described switching power circuit (11) is connected to car light supply line, and described control circuit (2) controls described switching power circuit (11) by described electronic switching circuit (12) and is connected with the break-make of car light supply line.
3. automobile xenon lamp frequency conversion decoder according to claim 2, it is characterized in that, described power circuit (1) also comprises is located at electronic switch between switching power circuit (11), car light supply line and reverse-connection preventing circuit (13), and power supply circuits (14) and car light detect load circuit (15); Described power supply circuits (14) are connected to car light supply line, and the control voltage of described electronic switch and reverse-connection preventing circuit (13) receiving key power circuit (11) controls it and car light supply line forms the loop that is turned on or off.
4. automobile xenon lamp frequency conversion decoder according to claim 3, is characterized in that:
Described electronic switch and reverse-connection preventing circuit (13) comprise metal-oxide-semiconductor Q1, one end is connected to the resistance R2 that switching power circuit (11) receives control voltage, the other end is connected to metal-oxide-semiconductor Q1 grid, one end ground connection, the other end are connected to the resistance R3 of metal-oxide-semiconductor Q1 grid, the source ground of described metal-oxide-semiconductor Q1, drain electrode is connected to the negative pole of power supply circuits (14);
Described power supply circuits (14) comprise transformer T2, the drain electrode that one winding one end is connected to car light supply line negative pole, the other end is connected to metal-oxide-semiconductor Q1, another winding one end is connected to car light supply line positive pole, the other end accesses switching power circuit (11) by inductance L 1;
Described control circuit (2) comprises control chip IC1, triode Q10, the other end of the diode D4 that negative pole is connected with the collector electrode of triode Q10, the resistance R41 connected with the positive pole of diode D4, described resistance R41 is connected to the positive pole of power supply circuits (14); Also comprise plus earth, voltage stabilizing didoe Z1 that negative pole is connected to triode Q10 base stage, two ends are connected to the resistance R26 of triode Q10 base stage and collector electrode respectively, the electric capacity C17 of one end connecting triode Q10 emitter, other end ground connection, the emitter of triode Q10 is connected with control chip IC1;
Described electronic switching circuit (12) comprises triode Q9, triode Q8, resistance R34 and resistance R33; The grounded emitter of described triode Q9, base stage is connected to automobile battery auxiliary power supply circuit (3), collector electrode is connected to the base stage of triode Q8 by resistance R34, the emitter of resistance R33 two ends difference connecting triode Q8 and base stage, the emitter of triode Q8 accesses the positive pole of described power supply circuits (14), collector electrode is connected with switching power circuit (11), and described control chip IC1 outputs control signals to the base stage of automobile battery auxiliary power supply circuit (3) and triode Q9;
Described car light detects load circuit (15) and comprises resistance R23 and metal-oxide-semiconductor Q6, the positive pole of described resistance R23 one end access power supply circuits (14), and the other end is connected with the drain electrode of metal-oxide-semiconductor Q6, the source ground of described metal-oxide-semiconductor;
Comprise the resistance R24 and resistance R25 that are sequentially connected in series, described resistance R25 ground connection, resistance R24 is connected with the grid of metal-oxide-semiconductor Q6 with the link of resistance R25;
Comprise triode Q7, its grounded emitter, collector electrode is connected to the link of resistance R24 and resistance R25, and base stage is connected to control chip IC1 by resistance R30, the resistance R29 connected successively;
Comprise resistance R28, its one end is connected to the link of resistance R30 and resistance R29, other end ground connection;
Comprise electric capacity C18, its one end is connected to the link of resistance R30 and resistance R29, other end ground connection;
Comprise resistance R27, its one end is connected to the link of resistance R30 and resistance R29, and the other end is connected to the positive pole of power supply circuits (14);
Comprise diode Z2, its plus earth, negative pole is connected to the collector electrode of triode Q7.
5. automobile xenon lamp frequency conversion decoder according to claim 4, it is characterized in that: described power circuit (1) also comprises current constant control Circuit tuning (16) and light-coupled isolation output voltage detecting circuit (17), described current constant control adjustment electricity (16) road, to switching power circuit (11) clamper, controls its continuous current working point; Described light-coupled isolation output voltage detecting circuit (17) one end is connected to described switching power circuit (11), the other end is connected to the output of described AC-battery power source power supply circuits (4), adjusts described switching power circuit (11) and exports constant voltage.
6. automobile xenon lamp frequency conversion decoder according to claim 4, it is characterized in that, also comprise: time delay discharge loop (5), it comprises the diode D11, diode D8, electric capacity C28 and the resistance R40 that are connected in series, described diode D11 negative pole is connected with the positive pole of diode D8, the negative pole of described diode D11 is by electric capacity C28 ground connection, the positive pole of described diode D11 is connected to the positive pole of power supply circuits, and the negative pole of described diode D8 is connected to the grid of metal-oxide-semiconductor Q6 by resistance R40.
7. automobile xenon lamp frequency conversion decoder according to claim 4, it is characterized in that, also comprise: time delay power supply circuits (6), it comprises the resistance R35, diode D10, the diode D5 that are sequentially connected in series, the negative pole of described diode D10 is connected with the positive pole of diode D5, the negative pole of described diode D5 is connected to the negative pole of diode D4, the other end of described resistance R35 is connected to the collector electrode of triode Q8, also comprises an end and receives diode D10 negative pole, the resistance R36 of other end ground connection and the electric capacity C16 in parallel with resistance R36.
8. automobile xenon lamp frequency conversion decoder according to claim 4, it is characterized in that: described switching power circuit (11) comprises transformer T1, another winding one end of described transformer T2 is connected to car light supply line positive pole, the other end access transformer T1 primary coil by inductance L 1;
Also comprise and inhale spike circuit (7), it comprises diode D6 and the electric capacity C6 at the primary coil two ends being connected in series in transformer T1, negative pole is connected to the diode D7 of diode D6 and electric capacity C6 link, and the positive pole of diode D7 is connected to switching power circuit (11).
9. automobile xenon lamp frequency conversion decoder according to claim 4, it is characterized in that, described AC-battery power source power supply circuits (4) comprise diode D2 and diode D9, the positive pole of described diode D2 is connected with power circuit (1), the positive pole of described diode D9 is connected with automobile battery auxiliary power supply circuit (3), the negative pole of described diode D2 and the negative pole of diode D9 are connected to positive output end jointly, negative output terminal ground connection, is parallel with electric capacity C7, electric capacity C27 and electric capacity C24 between positive and negative output.
10. automobile xenon lamp frequency conversion decoder according to claim 9, is characterized in that, described automobile battery auxiliary power supply circuit (3) comprises
Optocoupler control chip IC3, it is connected to the base stage of triode Q9 by resistance R22;
Metal-oxide-semiconductor Q3, its drain electrode is connected to the positive pole of diode D9, and source electrode is connected with vehicle-mounted charge anode, and grid is connected to optocoupler control chip IC3 by resistance R5;
Be connected in parallel on metal-oxide-semiconductor Q3 to drain and connect the grid of metal-oxide-semiconductor Q3 with the resistance R4 of grid and the positive pole of voltage stabilizing didoe Z3, described voltage stabilizing didoe Z3;
Photo resistance RV1 one end is connected to the source electrode of metal-oxide-semiconductor Q3, other end ground connection.
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| CN201410613084.6A CN104302080B (en) | 2014-11-04 | 2014-11-04 | Automobile xenon lamp variable frequency decoder |
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| CN201410613084.6A CN104302080B (en) | 2014-11-04 | 2014-11-04 | Automobile xenon lamp variable frequency decoder |
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| CN104302080B CN104302080B (en) | 2017-01-11 |
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| CN104302080B (en) | 2017-01-11 |
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