CN105916254A - High-resistance filtering-type light-operated LED control system based on linear driving circuit - Google Patents
High-resistance filtering-type light-operated LED control system based on linear driving circuit Download PDFInfo
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- CN105916254A CN105916254A CN201610405684.2A CN201610405684A CN105916254A CN 105916254 A CN105916254 A CN 105916254A CN 201610405684 A CN201610405684 A CN 201610405684A CN 105916254 A CN105916254 A CN 105916254A
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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]
- H05B45/10—Controlling the intensity of the light
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a high-resistance filtering-type light-operated LED control system based on a linear driving circuit. The system is mainly formed by a control chip U1, a brightness sensor, a triode VT1, a voltage stabilizing diode D2, a polar capacitor C4, a signal receiving circuit, a current adjusting circuit, a high resistance filtering circuit connected in series between the signal receiving circuit and an ANT base pin of the control chip U1, a linear driving circuit connected to the current adjusting circuit and a buffer type trigger circuit connected in series between the current adjusting circuit and the linear driving circuit. By using the system, an interference signal in signals output by the brightness sensor can be eliminated so that the signals output by the brightness sensor are accurate and signal processing accuracy of the system is increased. Simultaneously, the system can effectively adjust voltage intensity so that the system can be ensured to output a stable current.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of high resistant filtering type based on linear drive circuit
Light-operated LED control system.
Background technology
At present, due to LED have that energy consumption is low, the feature such as length in service life and safety and environmental protection, it is
Become one of main product of people's life lighting.People's many employings acoustic control, light-operated LED in life
Control system realizes the open and close to LED.Light-operated LED control system can be according to LED because of it
Lamp uses the brightness of environment to control the open and close of LED, and can effectively meet people to LED
In the requirement of energy-conservation aspect, and enjoy the favor of people.But, existing light-operated LED control system exists
Luminance signal is processed inaccurate problem, causes it can not control accurately according to the intensity of illumination of environment
The open and close of LED, thus cannot well meet people's requirement at energy-conservation aspect.Meanwhile, existing
Some light-operated LED control systems there is also the problem that output electric current is unstable, causes LED luminance unstable,
Thus have impact on the service life of LED.
Therefore it provides one can improve luminance signal processes accuracy, can ensure that again the electric current that output is stable
Light-operated LED control system be the task of top priority.
Summary of the invention
It is an object of the invention to overcome light-operated LED control system of the prior art to exist to luminance signal
Manage inaccurate, there is the defect that output electric current is unstable simultaneously, it is provided that a kind of based on linear drive circuit
High resistant filtering type light-operated LED control system.
The present invention is achieved through the following technical solutions: a kind of high resistant filtering type light based on linear drive circuit
Control LED control system, mainly by control chip U1, luminance sensor, audion VT1, N pole and control
The VDD pin of coremaking sheet U1 is connected, P pole base stage with audion VT1 after resistance R3 is connected
Zener diode D2, positive pole CTH pin with control chip U1 after resistance R4 is connected, negative pole
The polar capacitor C4 of ground connection, the signal receiving circuit being connected with luminance sensor, it is serially connected in signal and receives electricity
High resistant filter circuit between the ANT pin of road and control chip U1, respectively with the transmitting of audion VT1
The matrix current adjustment circuit that pole is connected with control chip U1, the Linear Driving being connected with matrix current adjustment circuit electricity
Road, and the buffer-type triggering circuit composition being serially connected between matrix current adjustment circuit and linear drive circuit；Institute
State the grounded collector of audion VT1；The VSS pin of described control chip U1 is connected with VDD pin
Connecing, its DO pin is then connected with SHUT pin.
Described high resistant filtered electrical routing amplifier P3, audion VT7, audion VT8, negative pole is through resistance
After 17, the base stage with audion VT7 is connected, positive pole as the input of high resistant filter circuit and connects with signal
Receiving the polar capacitor C15 that circuit is connected, negative pole is connected with the base stage of audion VT8, positive electrode resistance R30
Polar capacitor C16, the N pole that emitter stage with audion VT7 is connected afterwards after resistance R32 with amplifier
The diode that the positive pole of P3 is connected, P pole emitter stage with audion VT7 after resistance R31 is connected
D9, positive pole P pole with diode D9 after resistance R25 is connected, the polar capacitor C14 of minus earth,
The polar capacitor that negative pole is connected with the negative pole of amplifier P3, positive pole is connected with the emitter stage of audion VT8
C17, P pole colelctor electrode with audion VT8 after resistance R33 is connected, N pole is sequentially through resistance R28
Diode D10, the P pole adjustable resistance R34 being connected with colelctor electrode with audion VT7 after resistance R29
Be connected with the P pole of diode D10 afterwards, diode D11 that N pole is connected with the outfan of amplifier P3,
Negative pole P pole with diode D11 after resistance R35 is connected, positive pole is extremely connected with the N of diode D10
The polar capacitor C18 connect, and one end is connected with the junction point of resistance R28 with resistance R29, the other end
The resistance R27 composition of ground connection；The outfan of described amplifier P3 as high resistant filter circuit outfan and with
The ANT pin of control chip U1 is connected.
Described buffer-type triggers circuit by audion VT5, audion VT6, amplifier P2, positive pole and three
The base stage of pole pipe VT5 is connected, negative pole as buffer-type trigger circuit input and and matrix current adjustment circuit
Polar capacitor C10, the P pole being connected negative pole with polar capacitor C10 after resistance R16 is connected, N
The diode D6 that pole emitter stage with audion VT5 after resistance R18 is connected, negative pole and audion VT6
The polar capacitor C11 that base stage is connected, positive pole is connected with the N pole of diode D6 after resistance R19,
N pole positive pole with polar capacitor C11 after resistance R20 is connected, the colelctor electrode of P pole and audion VT5
The diode D7 being connected, one end is connected with the negative pole of amplifier P2, the other end and audion VT6
The resistance R22 that emitter stage is connected, negative pole is connected with the outfan of amplifier P2, positive pole and audion
The polar capacitor C13 that the emitter stage of VT6 is connected, one end is connected with the positive pole of polar capacitor C13, separately
Resistance R23, the P pole that one end is connected with amplifier P2 outfan after resistance R24 with amplifier P2's
Outfan is connected, N pole is triggered the outfan of circuit as buffer-type and is connected with linear drive circuit
Diode D8, one end is connected with the anelectrode of amplifier P2, the other end is extremely connected with the P of diode D7
The resistance R21 connect, and negative pole is connected with the positive pole of amplifier P2, after positive electrode resistance R17 with audion
The polar capacitor C12 composition that the base stage of VT5 is connected；The grounded collector of described audion VT6；Described
The P pole ground connection of diode D6；The negative electrode ground connection of described amplifier P2.
Described signal receiving circuit by amplifier P1, negative pole is connected with the positive pole of amplifier P1, positive pole with
The polar capacitor C1 that luminance sensor is connected, positive pole negative pole with amplifier P1 after resistance R1 is connected,
Polar capacitor C2, the P pole of minus earth is connected with the positive pole of polar capacitor C1, N pole is after resistance R2
The diode D1 being connected with the outfan of amplifier P1, and positive pole is connected with the outfan of amplifier P1
Connect, polar capacitor C3 that negative pole is connected with the positive pole of polar capacitor C15 composition.
Described matrix current adjustment circuit is by the REF of audion VT2, audion VT3, positive pole and control chip U1
Polar capacitor C5, the P pole that pin is connected, negative pole is connected with the base stage of audion VT2 is through resistance R8
Afterwards the positive pole with polar capacitor C5 be connected, N pole after adjustable resistance R9 with the colelctor electrode of audion VT3
The diode D3 being connected, one end is connected with the CAGC pin of control chip U1, the other end and three poles
The resistance R7 that the emitter stage of pipe VT2 is connected, one end is connected with the colelctor electrode of audion VT2, another
The inductance L that end is connected with the base stage of audion VT3, and positive pole is sequentially after resistance R6 and resistance R5
Be connected with the emitter stage of audion VT1, polar capacitor that negative pole is connected with the base stage of audion VT3
C6 forms；The base stage of described audion VT3 is connected with the SHUT pin of control chip U；Described three
The emitter stage of pole pipe VT3 as the outfan of matrix current adjustment circuit and is connected with linear drive circuit；Described
The N pole of diode D3 is connected with the negative pole of polar capacitor C10.
Described linear drive circuit is by driving chip U2, audion VT4, field effect transistor MOS, and P is the most suitable
Secondary be connected through resistance R13 CS pin with driving chip U2 after resistance R10, N pole is through resistance R14
The base stage of the Zener diode D4 being connected with the source electrode of field effect transistor MOS afterwards, negative pole and audion VT4
Be connected, polar capacitor C8 that positive pole is connected with the OUT pin of driving chip U2, positive pole is through resistance
After R11, the emitter stage with audion VT3 is connected, FB with driving chip U2 manages after negative pole resistance R12
Polar capacitor C7, the P pole that foot is connected is connected with the colelctor electrode of audion VT4, N pole and driving chip
The diode D5 that the FB pin of U2 is connected, and positive pole after resistance R15 with field effect transistor MOS
The polar capacitor C9 composition of ground connection after drain electrode is connected, negative pole is connected with the N pole of diode D5；Described
The VCC pin of driving chip U2 is connected with the emitter stage of audion VT3, its GND pin ground connection；
The described emitter stage of audion VT4 is connected with the grid of field effect transistor MOS；Described resistance R13 and electricity
The junction point of resistance R10 is connected with the N pole of diode D8；The N pole of described Zener diode D4 and pole
The negative pole of property electric capacity C9 is collectively forming the outfan of linear drive circuit.
For the practical effect of the present invention, described control chip U1 the most preferentially uses MICRF007 collection
Chip is become to realize；The most described driving chip U2 the most preferentially have employed and realizes for the integrated chip of AP3766.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the interference signal in the signal of luminance sensor output can be eliminated by the present invention, makes brightness pass
The signal of sensor output is more accurate, thus improves the present invention accuracy to signal processing, it is ensured that this
The bright open and close that can control LED according to the intensity of illumination in range accurately, the most satisfied
People requirements at energy-conservation aspect；The intensity of electric current can effectively be adjusted by the present invention simultaneously, thus
Ensure that the present invention can export stable electric current, make the brightness stability of LED, effective prolongation LED
Service life.
(2) input signal can be filtered by the present invention, effectively eliminates the disturbance letter scurrying in luminance signal
Number ripple, makes signal frequency smoother, ensures that the present invention accuracy to signal processing.
(3) present invention employs the integrated chip of AP3766 and be used as driving chip, this chip performance is stable,
There is the function such as overtemperature protection, overcurrent protection simultaneously, thus enable the invention to export stable driving electric current,
Ensure that the stability of LED brightness.
(4) when LED can be opened by the present invention, the instantaneous high current of output electric current is adjusted, and makes LED
Lamp is not by high circuit damage, and ensure that stablizing of output electric current, thus improves the present invention and export electric current
Stability.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the buffer-type triggering circuit of the present invention.
Fig. 3 is the electrical block diagram of the high resistant filter circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U1, luminance sensor, audion VT1, electricity
Resistance R3, resistance R4, polar capacitor C4, Zener diode D2, high resistant filter circuit, buffer-type triggers electricity
Road, signal receiving circuit, matrix current adjustment circuit, and linear drive circuit composition.
During enforcement, the N pole of Zener diode D2 is connected with the VDD pin of control chip U1, its P
Pole base stage with audion VT1 after resistance R3 is connected.The positive pole of polar capacitor C4 is after resistance R4
Be connected with the CTH pin of control chip U1, its minus earth.Signal receiving circuit and luminance sensor
It is connected.High resistant filter circuit is serially connected between the ANT pin of signal receiving circuit and control chip U1.
Matrix current adjustment circuit is connected with emitter stage and the control chip U1 of audion VT1 respectively.Linear Driving electricity
Road is connected with matrix current adjustment circuit.Buffer-type triggers circuit and is serially connected in matrix current adjustment circuit and Linear Driving electricity
Between road.The grounded collector of described audion VT1；The VSS pin of described control chip U1 and VDD
Pin is connected, and its DO pin is then connected with SHUT pin；The output of described linear drive circuit
End is then connected with LED group；The N pole of described Zener diode D2 is connected with outside 12V DC voltage
Connect.
Wherein, described signal receiving circuit by amplifier P1, resistance R1, resistance R2, polar capacitor C1,
Polar capacitor C2, polar capacitor C3, and diode D1 form.
During connection, the negative pole of polar capacitor C1 is connected with the positive pole of amplifier P1, its positive pole passes with brightness
Sensor is connected.The positive pole of polar capacitor C2 negative pole with amplifier P1 after resistance R1 is connected, it is born
Pole ground connection.The P pole of diode D1 is connected with the positive pole of polar capacitor C1, its N pole is after resistance R2
It is connected with the outfan of amplifier P1.The positive pole of polar capacitor C3 is connected with the outfan of amplifier P1,
Its negative pole is connected with the positive pole of polar capacitor C15.
Further, described matrix current adjustment circuit is by audion VT2, audion VT3, resistance R5, electricity
Resistance R6, resistance R7, resistance R8, adjustable resistance R9, inductance L, polar capacitor C5, polar capacitor C6,
And diode D3 composition.
During connection, the positive pole of polar capacitor C5 is connected with the REF pin of control chip U1, its negative pole
It is connected with the base stage of audion VT2.The P pole of diode D3 after resistance R8 with polar capacitor C5's
Positive pole is connected, its N pole colelctor electrode with audion VT3 after adjustable resistance R9 is connected.Resistance R7
One end be connected with the CAGC pin of control chip U1, the emitter stage of its other end and audion VT2
It is connected.One end of inductance L is connected with the colelctor electrode of audion VT2, its other end and audion VT3
Base stage be connected.The positive pole of polar capacitor C6 sequentially after resistance R6 and resistance R5 with audion VT1
Emitter stage be connected, its negative pole is connected with the base stage of audion VT3.
The base stage of described audion VT3 is connected with the SHUT pin of control chip U；Described audion
The emitter stage of VT3 as the outfan of matrix current adjustment circuit and is connected with linear drive circuit；Described two poles
The N pole of pipe D3 is connected with the negative pole of polar capacitor C10.
Further, described linear drive circuit is by driving chip U2, audion VT4, field effect transistor
MOS, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, polarity
Electric capacity C7, polar capacitor C8, polar capacitor C9, Zener diode D4, and diode D5 form.
During connection, the P pole of Zener diode D4 sequentially after resistance R13 and resistance R10 with driving chip
The CS pin of U2 is connected, its N pole source electrode with field effect transistor MOS after resistance R14 is connected.
The negative pole of polar capacitor C8 is connected with the base stage of audion VT4, the OUT of its positive pole and driving chip U2
Pin is connected.The positive pole of polar capacitor C7 emitter stage with audion VT3 after resistance R11 is connected,
It is connected with the FB pin of driving chip U2 after its negative pole resistance R12.The P pole of diode D5 and three poles
The colelctor electrode of pipe VT4 is connected, its N pole is connected with the FB pin of driving chip U2.Polar capacitor
The drain electrode with field effect transistor MOS after resistance R15 of the positive pole of C9 is connected, its negative pole and diode D5
N pole be connected after ground connection.
The VCC pin of described driving chip U2 is connected with the emitter stage of audion VT3, and its GND manages
Foot ground connection；The described emitter stage of audion VT4 is connected with the grid of field effect transistor MOS；Described resistance
The junction point of R13 and resistance R10 is connected with the N pole of diode D8；The N of described Zener diode D4
Pole is collectively forming the outfan of linear drive circuit and is connected with LED group with the negative pole of polar capacitor C9.
As in figure 2 it is shown, described buffer-type triggering circuit is by audion VT5, audion VT6, amplifier P2,
Resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22,
Resistance R23, resistance R24, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor
C13, diode D6, diode D7, and diode D8 form.
During connection, the positive pole of polar capacitor C10 is connected with the base stage of audion VT5, its negative pole is as slow
Formula of rushing triggers the input of circuit and is connected with matrix current adjustment circuit.The P pole of diode D6 is through resistance R16
Afterwards the negative pole with polar capacitor C10 be connected, its N pole after resistance R18 with the emitter stage of audion VT5
It is connected.The negative pole of polar capacitor C11 is connected with the base stage of audion VT6, its positive pole is through resistance R19
It is connected with the N pole of diode D6 afterwards.
Wherein, the N pole of diode D7 positive pole with polar capacitor C11 after resistance R20 be connected, its
P pole is connected with the colelctor electrode of audion VT5.One end of resistance R22 is connected with the negative pole of amplifier P2,
Its other end is connected with the emitter stage of audion VT6.The negative pole of polar capacitor C13 is with amplifier P2's
Outfan is connected, its positive pole is connected with the emitter stage of audion VT6.One end of resistance R23 and polarity
The positive pole of electric capacity C13 is connected, its other end is connected with amplifier P2 outfan.The P of diode D8
Pole outfan with amplifier P2 after resistance R24 is connected, circuit is triggered as buffer-type in its N pole
Outfan is also connected with linear drive circuit.
Meanwhile, one end of resistance R21 be connected with the anelectrode of amplifier P2, its other end and diode
The P pole of D7 is connected.The negative pole of polar capacitor C12 is connected with the positive pole of amplifier P2, its positive electrical
It is connected with the base stage of audion VT5 after resistance R17.The grounded collector of described audion VT6；Described two
The P pole ground connection of pole pipe D6；The negative electrode ground connection of described amplifier P2.
As it is shown on figure 3, described high resistant filtered electrical routing amplifier P3, audion VT7, audion VT8,
Resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31,
Resistance R32, resistance R33, adjustable resistance R34, resistance R35, polar capacitor C14, polar capacitor C15,
Polar capacitor C16, polar capacitor C17, polar capacitor C18, diode D9, diode D10, and
Diode D11 forms.
During connection, the negative pole of polar capacitor C15 base stage with audion VT7 after resistance 17 is connected,
Its positive pole as the input of high resistant filter circuit and is connected with signal receiving circuit.Polar capacitor C16's
Negative pole is connected with the base stage of audion VT8, after its positive electrode resistance R30 with the emitter stage phase of audion VT7
Connect.The N pole of diode D9 positive pole with amplifier P3 after resistance R32 is connected, its P pole is through electricity
It is connected with the emitter stage of audion VT7 after resistance R31.The positive pole of polar capacitor C14 after resistance R25 with
The P pole of diode D9 is connected, its minus earth.
Meanwhile, the negative pole of polar capacitor C17 be connected with the negative pole of amplifier P3, its positive pole and audion
The emitter stage of VT8 is connected.The P pole of diode D10 after resistance R33 with the colelctor electrode of audion VT8
Be connected, its N pole is sequentially connected through resistance R28 colelctor electrode with audion VT7 after resistance R29.
Be connected with the P pole of diode D10 after the P pole adjustable resistance R34 of diode D11, its N pole and amplification
The outfan of device P3 is connected.The negative pole of polar capacitor C18 after resistance R35 with the P of diode D11
Pole is connected, its positive pole is connected with the N pole of diode D10.One end of resistance R27 and resistance R28 with
The junction point of resistance R29 is connected, its other end ground connection.The outfan of described amplifier P3 is filtered as high resistant
The outfan of wave circuit is also connected with the ANT pin of control chip U1.
During operation, the interference signal in the signal of luminance sensor output can be eliminated by the present invention, and
Input signal can be filtered by the present invention, effectively eliminates the disturbing signal ripple scurried in luminance signal, makes
Signal frequency is smoother, thus improves the present invention accuracy to signal processing, it is ensured that LED is opened
Accuracy with closing, preferably achieves people's requirement at energy-conservation aspect.
Meanwhile, present invention employs the integrated chip of AP3766 and be used as driving chip U2, this chip performance is steady
Fixed, there is the function such as overtemperature protection, overcurrent protection simultaneously, thus enable the invention to export stable driving electricity
Stream, it is ensured that the stability of LED brightness.The intensity of electric current can effectively be adjusted by the present invention, and
And the present invention when LED can be opened the instantaneous high current of output electric current be adjusted, make LED the highest
Circuit damage, ensures that the present invention can export stable electric current, makes the brightness stability of LED, effectively
Service life of prolongation LED.
During enforcement, for the practical effect of the present invention, described control chip U1 the most preferentially uses
The integrated chip of MICRF007 realizes.Brightness signal value is prestored, this control chip in this control chip U1
U1 can obtain luminance signal after being analyzed processing by the ambient light signal being gathered luminance sensor
Data value, when the data value signal that control chip U1 obtains is less than the data value of its internal memory, output controls electricity
Stream, now, audion VT3 must conduct, and LED group obtains electric being lit.Otherwise, work as control chip
The data value signal that U1 obtains does not exports control electric current, now, audion when being more than the data value of its internal memory
VT3 dead electricity disconnects, and LED group is not lit.
According to above-described embodiment, can well realize the present invention.
Claims (8)
1. a high resistant filtering type light-operated LED control system based on linear drive circuit, it is characterised in that
Mainly by control chip U1, luminance sensor, audion VT1, N pole and the VDD of control chip U1
The Zener diode D2 that pin is connected, P pole base stage with audion VT1 after resistance R3 is connected,
Positive pole CTH pin with control chip U1 after resistance R4 is connected, the polar capacitor C4 of minus earth,
The signal receiving circuit being connected with luminance sensor, is serially connected in signal receiving circuit and control chip U1's
High resistant filter circuit between ANT pin, respectively with emitter stage and the control chip U1 phase of audion VT1
The matrix current adjustment circuit connected, the linear drive circuit being connected with matrix current adjustment circuit, and it is serially connected in electricity
Stream adjusts the buffer-type between circuit and linear drive circuit and triggers circuit composition；The collection of described audion VT1
Electrode ground connection；The VSS pin of described control chip U1 is connected with VDD pin, its DO pin then with
SHUT pin is connected.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 1
Control system, it is characterised in that described high resistant filtered electrical routing amplifier P3, audion VT7, audion
VT8, negative pole base stage with audion VT7 after resistance 17 is connected, positive pole is as high resistant filter circuit
Input the polar capacitor C15 being connected with signal receiving circuit, the base stage phase of negative pole and audion VT8
Polar capacitor C16, the N pole warp being connected with the emitter stage of audion VT7 after connection, positive electrode resistance R30
After resistance R32 the positive pole with amplifier P3 be connected, P pole after resistance R31 with audion VT7 send out
The diode D9 that emitter-base bandgap grading is connected, positive pole P pole with diode D9 after resistance R25 is connected, negative pole
The polar capacitor C14 of ground connection, negative pole is connected with the negative pole of amplifier P3, positive pole is sent out with audion VT8's
Polar capacitor C17, the P pole that emitter-base bandgap grading is connected colelctor electrode with audion VT8 after resistance R33 is connected,
The diode D10 that N pole is sequentially connected through resistance R28 colelctor electrode with audion VT7 after resistance R29,
After the adjustable resistance R34 of P pole the P pole with diode D10 be connected, the outfan phase of N pole and amplifier P3
The diode D11 connected, negative pole P pole with diode D11 after resistance R35 is connected, positive pole and two
The polar capacitor C18 that the N pole of pole pipe D10 is connected, and the company of one end and resistance R28 and resistance R29
Contact is connected, the resistance R27 of other end ground connection composition；The outfan of described amplifier P3 is filtered as high resistant
The outfan of wave circuit is also connected with the ANT pin of control chip U1.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 2
Control system, it is characterised in that described buffer-type triggering circuit, by audion VT5, audion VT6, is put
Big device P2, positive pole is connected with the base stage of audion VT5, negative pole is as the input of buffer-type triggering circuit
And polar capacitor C10, the P pole being connected with matrix current adjustment circuit after resistance R16 with polar capacitor C10
The diode D6 that negative pole is connected, N pole emitter stage with audion VT5 after resistance R18 is connected,
Negative pole is connected with the base stage of audion VT6, positive pole N with diode D6 after resistance R19 is extremely connected
Polar capacitor C11, the N pole connect positive pole with polar capacitor C11 after resistance R20 is connected, P pole with
The diode D7 that the colelctor electrode of audion VT5 is connected, one end is connected with the negative pole of amplifier P2, separately
The resistance R22 that one end is connected with the emitter stage of audion VT6, negative pole is connected with the outfan of amplifier P2
Connect, polar capacitor C13 that positive pole is connected with the emitter stage of audion VT6, one end and polar capacitor C13
Resistance R23, the P pole that positive pole is connected, the other end is connected with amplifier P2 outfan through resistance R24
Afterwards the outfan with amplifier P2 be connected, N pole as buffer-type trigger circuit outfan and with linearly drive
The diode D8 that galvanic electricity road is connected, one end is connected with the anelectrode of amplifier P2, the other end and two poles
The resistance R21 that the P pole of pipe D7 is connected, and negative pole is connected with the positive pole of amplifier P2, positive electrical
The polar capacitor C12 composition being connected with the base stage of audion VT5 after resistance R17；Described audion VT6
Grounded collector；The P pole ground connection of described diode D6；The negative electrode ground connection of described amplifier P2.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 3
Control system, it is characterised in that described signal receiving circuit is by amplifier P1, and negative pole is with amplifier P1 just
The polar capacitor C1 that pole is connected, positive pole is connected with luminance sensor, positive pole after resistance R1 with amplification
The negative pole of device P1 is connected, polar capacitor C2, the P pole of minus earth is connected with the positive pole of polar capacitor C1
Connect, diode D1 that N pole outfan with amplifier P1 after resistance R2 is connected, and positive pole with put
The polar capacitor C3 group that outfan is connected, negative pole is connected with the positive pole of polar capacitor C15 of big device P1
Become.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 4
Control system, it is characterised in that described matrix current adjustment circuit is by audion VT2, audion VT3, positive pole
Be connected with the REF pin of control chip U1, polarity that negative pole is connected with the base stage of audion VT2 electricity
Hold that C5, P pole positive pole with polar capacitor C5 after resistance R8 is connected, N pole is after adjustable resistance R9
The CAGC pin of the diode D3 being connected with the colelctor electrode of audion VT3, one end and control chip U1
Be connected, resistance R7 that the other end is connected with the emitter stage of audion VT2, one end and audion VT2
The inductance L that colelctor electrode is connected, the other end is connected with the base stage of audion VT3, and positive pole is sequentially
Be connected through resistance R6 emitter stage with audion VT1 after resistance R5, negative pole is with audion VT3's
The polar capacitor C6 composition that base stage is connected；The base stage of described audion VT3 and the SHUT of control chip U
Pin is connected；The emitter stage of described audion VT3 as matrix current adjustment circuit outfan and with linearly drive
Galvanic electricity road is connected；The N pole of described diode D3 is connected with the negative pole of polar capacitor C10.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 5
Control system, it is characterised in that described linear drive circuit is imitated by driving chip U2, audion VT4, field
Should pipe MOS, P pole is sequentially connected through resistance R13 CS pin with driving chip U2 after resistance R10
Connect, Zener diode D4 that N pole is connected with the source electrode of field effect transistor MOS after resistance R14, negative pole
Be connected with the base stage of audion VT4, polarity that positive pole is connected with the OUT pin of driving chip U2 electricity
Hold C8, positive pole emitter stage with audion VT3 after resistance R11 is connected, after negative pole resistance R12 with
The colelctor electrode phase of polar capacitor C7, the P pole that the FB pin of driving chip U2 is connected and audion VT4
The diode D5 that connection, N pole are connected with the FB pin of driving chip U2, and positive pole is through resistance R15
Be connected with the drain electrode of field effect transistor MOS afterwards, negative pole be connected with the N pole of diode D5 after the pole of ground connection
Property electric capacity C9 composition；The VCC pin of described driving chip U2 is connected with the emitter stage of audion VT3,
Its GND pin ground connection；The described emitter stage of audion VT4 is connected with the grid of field effect transistor MOS；
The junction point of described resistance R13 and resistance R10 is connected with the N pole of diode D8；Described voltage stabilizing two pole
The N pole of pipe D4 and the negative pole of polar capacitor C9 are collectively forming the outfan of linear drive circuit.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 6
Control system, it is characterised in that described control chip U1 is the integrated chip of MICRF007.
A kind of high resistant filtering type light-operated LED based on linear drive circuit the most according to claim 6
Control system, it is characterised in that described driving chip U2 is the integrated chip of AP3766.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405684.2A CN105916254A (en) | 2016-06-08 | 2016-06-08 | High-resistance filtering-type light-operated LED control system based on linear driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405684.2A CN105916254A (en) | 2016-06-08 | 2016-06-08 | High-resistance filtering-type light-operated LED control system based on linear driving circuit |
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| CN201610405684.2A Pending CN105916254A (en) | 2016-06-08 | 2016-06-08 | High-resistance filtering-type light-operated LED control system based on linear driving circuit |
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| Country | Link |
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2016
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Application publication date: 20160831 |