CN105960050A - Brightness adjustable high-stability large-power driving system for blue light LED - Google Patents
Brightness adjustable high-stability large-power driving system for blue light LED Download PDFInfo
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- CN105960050A CN105960050A CN201610346233.6A CN201610346233A CN105960050A CN 105960050 A CN105960050 A CN 105960050A CN 201610346233 A CN201610346233 A CN 201610346233A CN 105960050 A CN105960050 A CN 105960050A
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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]
- H05B45/40—Details of LED load circuits
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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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- 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 brightness adjustable high-stability large-power driving system for a blue light LED. The system is characterized by mainly comprising a control chip U1, a light adjustment control circuit, a reference correction circuit, a gradient compensation circuit, a logic buffering circuit, a current bootstrap amplification circuit and an overcurrent protection output voltage stabilizing circuit, wherein the light adjustment control circuit, the reference correction circuit, the gradient compensation circuit and the logic buffering circuit are connected with the control chip U1, the current bootstrap amplification circuit is connected with the logic buffering circuit, the overcurrent protection output voltage stabilizing circuit is connected in series between the reference correction circuit and the logic buffering circuit, the light adjustment control circuit is connected with the logic buffering circuit, and the reference correction circuit is connected with the logic buffer circuit. According to the system, external electromagnetic interference can be eliminated or attenuated, voltage and current are limited so that the voltage and current are kept stable, and in practical use, the anti-electromagnetic-interference capability of the high-stability driving system is 2.5 times that of a present driving system, stable driving current can be output, and it is effectively ensured that the brightness of blue light LED lamps is stable.
Description
Technical field
The present invention relates to electric energy-saving field, specifically, be that a kind of adjustable blue-ray LED of brightness is high steady
State high-power driving system.
Background technology
LED is as novel energy-conserving light source, with its environmental protection, the feature such as energy-conservation, life-span length, volume are little,
Through extensively being received by people and using.Owing to LED is the semiconductor device of characteristic sensitivity, there is again negative temperature
Characteristic, therefore in application process, the drive system of LED is stable to LED, reliable duty plays
Considerable effect.
Along with people's living standard constantly improves, all energy to LED brightness at home or in shop
Consumption is had higher requirement, i.e. people need, while improving LED brightness further, to need LED
Light fixture has lower energy consumption.Then, the driving stability of LED drive system is just proposed more by people
High requirement.But, it is poor to there is anti-electromagnetic interference capability in traditional LED drive system that current people are used,
Load capacity is poor, drives instability, and the problem can accurately not being adjusted the brightness of LED, no
The requirement of people can be met.
Therefore it provides one can improve anti-electromagnetic interference capability, can ensure that again and drive stable, brightness regulation
LED drive system is the task of top priority accurately.
Summary of the invention
It is an object of the invention to the ability overcoming LED drive system of the prior art to there is electromagnetism interference
Difference, drive instability, the defect of brightness regulation poor accuracy, it is provided that the adjustable blue-ray LED of a kind of brightness
By high stable state high-power driving system.
The present invention is achieved through the following technical solutions: a kind of adjustable blue-ray LED of brightness is big by high stable state
Power driven system, mainly by control chip U1, the adjusting control circuit that is all connected with control chip U1,
Reference correction circuit, slope equalizer and logic buffer circuit, the electric current being connected with logic buffer circuit
Bootstrapping amplifying circuit, and the overcurrent protection output being serially connected between reference correction circuit and logic buffer circuit
Mu balanced circuit forms；Described adjusting control circuit is connected with logic buffer circuit；Described reference correction circuit
It is connected with logic buffer circuit.
Described electric current bootstrapping amplifying circuit is by amplifier P2, amplifier P3, audion VT4, positive electrode resistance
After R44 the negative electrode with amplifier P3 be connected, the polar capacitor C17 of minus earth, negative pole is through resistance R42
Electrode input end with amplifier P2 is connected afterwards, positive pole is collectively forming electric current with the positive pole of polar capacitor C17
The bootstrapping input of amplifying circuit the polar capacitor C16 being connected with logic buffer circuit, one end and amplifier
The negative input of P2 is connected, the resistance R41 of other end ground connection, negative pole after resistance R48 with audion
The polar capacitor C18 that the base stage of VT4 is connected, positive pole is connected with the outfan of amplifier P2, one end with
The resistance R50 that the negative pole of polar capacitor C18 is connected, the other end is connected with the base stage of audion VT8,
N pole is sequentially connected through resistance R47 negative pole with polar capacitor C18 after resistance R48, P pole is through resistance
Diode D12, the N pole that after R43, negative input with amplifier P2 is connected is sent out with audion VT4's
The diode D13 that emitter-base bandgap grading is connected, P pole negative input with amplifier P3 after resistance R45 is connected,
Negative pole colelctor electrode with audion VT4 after resistance R51 is connected, positive pole after resistance R46 with amplifier
The polar capacitor C19 that the outfan of P3 is connected, and N pole after resistance R49 with polar capacitor C18's
The diode D14 group that negative pole is connected, P pole negative pole with polar capacitor C19 after resistance R52 is connected
Become；The common shape of anelectrode of the negative input ground connection of described amplifier P3, its anelectrode and amplifier P2
Become the outfan of electric current bootstrapping amplifying circuit and be connected with LED group；The negative electrode of described amplifier P2
It is connected with the negative electrode of amplifier P3.
Described adjusting control circuit is by amplifier P1, audion VT6, audion VT7, one end and amplification
The electrode input end of device P1 is connected, the other end is as input and the control chip U of adjusting control circuit
The resistance R30 that GATE pin is connected, positive pole after resistance R32 with the negative input phase of amplifier P1
The polar capacitor C14 that connection, negative pole are connected with the PWM pin of control chip U, negative pole is through resistance R38
Colelctor electrode with audion VT6 is connected afterwards, positive pole is collectively forming light modulation control with the emitter stage of audion VT7
Polar capacitor C15, the N pole of circuit output end processed sequentially after adjustable resistance R36 and resistance R37 with polarity
Diode D9, the N pole that the positive pole of electric capacity C15 is connected, P pole is connected with the outfan of amplifier P1
Be connected with the base stage of audion VT6, P pole outfan with amplifier P1 after resistance R35 is connected
Diode D10, negative pole control end with adjustable resistance R36 after resistance R33 is connected, positive pole is through resistance
Polar capacitor C13, the N pole that after R31, electrode input end with amplifier P1 is connected after resistance R40 with
The diode D11 that the negative pole of polar capacitor C15 is connected, P pole is connected with the colelctor electrode of audion VT7,
And N pole is sequentially connected through resistance R34 emitter stage with audion VT7 after adjustable resistance R39, P
The diode D8 composition that pole is connected with the electrode input end of amplifier P1；The transmitting of described audion VT6
Pole is connected with the base stage of audion VT7.
The overcurrent protection that described overcurrent protection output voltage stabilizing circuit is connected with reference correction circuit by input
Circuit, the mu balanced circuit being connected with the outfan of current foldback circuit with input forms；Described voltage stabilizing electricity
The outfan on road is connected with logic buffer circuit.
Described current foldback circuit by audion VT4, audion VT5, negative pole after resistance R21 with three poles
The pole that the colelctor electrode of pipe VT5 is connected, positive pole colelctor electrode with audion VT4 after resistance R20 is connected
Property electric capacity C9, positive pole positive pole with polar capacitor C9 after resistance R17 is connected, negative pole is through resistance R18
Polar capacitor C8, the P pole that colelctor electrode with audion VT4 is connected afterwards after resistance R19 with polar capacitor
The diode that the negative pole of C8 is connected, N pole emitter stage with audion VT4 after resistance R22 is connected
D6, negative pole base stage with audion VT5 after adjustable resistance R26 is connected, positive pole after resistance R23 with
The polar capacitor C10 that the emitter stage of audion VT4 is connected, and the colelctor electrode of N pole and audion VT5
Be connected, diode D7 composition that P pole base stage with audion VT4 after resistance R29 is connected；Institute
State the positive pole input as current foldback circuit of polar capacitor C8；The emitter stage of described audion VT5
With the outfan that the negative pole of polar capacitor C10 is collectively forming current foldback circuit.
Described mu balanced circuit is by voltage stabilizing chip U2, and positive pole is managed with the IN of voltage stabilizing chip U2 after resistance R27
The polar capacitor C12 of ground connection after foot is connected, negative pole is connected with the GND pin of voltage stabilizing chip U2, one
End is connected with the negative pole of polar capacitor C12, the other end is connected with the OUGT pin of voltage stabilizing chip U2
Resistance R28, and positive pole sequentially after resistance R25 and resistance R24 with the emitter stage phase of audion VT5
The polar capacitor C11 composition that connection, negative pole are connected with the OUT pin of voltage stabilizing chip U2；Described voltage stabilizing
The IN pin of chip U2 is connected with the negative pole of polar capacitor C10, and its OUT pin is as mu balanced circuit
Outfan be connected with logic buffer circuit.
Described reference correction circuit is connected with logic buffer circuit；Described reference correction circuit is by audion
VT1, audion VT2, P pole is connected with the base stage of audion VT1, the base of N pole and audion VT2
Diode D2, the P pole that pole is connected is connected with the colelctor electrode of audion VT1, N pole is sequentially through resistance
The diode D1 being connected with the base stage of audion VT2 after R2 and resistance R1, positive pole after inductance L with
The polar capacitor C1 that the base stage of audion VT2 is connected, negative pole is connected with the N pole of diode D1, just
Pole base stage with audion VT2 after resistance R3 is connected, negative pole after resistance R4 with audion VT1
The polar capacitor C2 that is connected of emitter stage, and positive pole after resistance R5 with the colelctor electrode of audion VT2
Be connected, negative pole be connected with the GND pin of control chip U1 after ground connection polar capacitor C3 composition；
The grounded collector of described audion VT1；The positive pole of described polar capacitor C1 and the N pole of diode D1
It is collectively forming the input of reference correction circuit；The emitter stage of described audion VT2 is as reference correction circuit
Outfan and be connected with the positive pole of polar capacitor C8.
Described slope equalizer by audion VT3, negative pole is connected with the LD pin of control chip U1,
The polar capacitor C6 that positive pole is connected with the base stage of audion VT3, positive pole after resistance R16 with audion
The emitter stage of VT3 is connected, negative pole sequentially after resistance R14 and resistance R13 with the RL of control chip U1
The polar capacitor C7 that pin is connected, and one end is connected with the colelctor electrode of audion VT3, the other end with
The negative pole of polar capacitor C7 be connected after ground connection adjustable resistance R15 composition.
Described logic buffer circuit is by field effect transistor MOS1, field effect transistor MOS2, and P pole is sequentially through resistance
After R12 and resistance R11 the CS pin with control chip U1 be connected, N pole and field effect transistor MOS2
The diode D5 that source electrode is connected, one end is connected with the negative pole of polar capacitor C15, the other end and field effect
Resistance R10, the N pole that the grid of pipe MOS2 is connected is connected with the source electrode of field effect transistor MOS1, P
The diode D4 that pole is connected with the VIN pin of control chip U1 after resistance R9, negative pole and field effect
The drain electrode of pipe MOS2 is connected, positive pole is connected with the drain electrode of field effect transistor MOS2 after resistance R8
Polar capacitor C5, one end is connected with the drain electrode of field effect transistor MOS1, the other end and voltage stabilizing chip U2
The resistance R6 that OUT pin is connected, positive pole grid with field effect transistor MOS1 after resistance R7 is connected,
The polar capacitor C4 of minus earth, and P pole is connected with the negative pole of polar capacitor C4, N pole and voltage stabilizing
The diode D3 composition that the OUT pin of chip U2 is connected；The N pole of described diode D3 and polarity
The positive pole of electric capacity C4 is connected；The emitter stage phase of the source electrode of described field effect transistor MOS2 and audion VT7
Connect；The drain electrode of described field effect transistor MOS2 is connected with the positive pole of polar capacitor C17；Described polarity electricity
The positive pole holding C5 is connected with the positive pole of polar capacitor C16.
For the practical effect of the present invention, described control chip U1 the most preferentially uses AX9021 integrated
Chip realizes；The most described voltage stabilizing chip U2 the most preferentially have employed the integrated chip of CW7805 and realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention has stronger anti-electromagnetic interference capability, under-voltage overcurrent protection, voltage lockout and electric current
The functions such as restriction, and stable driving electric current can be exported, effectively guarantee the stability of blue LED lamp brightness.
(2) brightness of LED can also be regulated by the present invention simultaneously accurately, thus the present invention can be fine
The demand meeting people.
(3) anti-electromagnetic interference capability of the present invention improves than the anti-electromagnetic interference capability of existing drive system
More than 1.5 times,
(4) load capacity of the present invention improves more than 80% than the load capacity of existing drive system, thus
More LED group can be driven, to meet the demand of people simultaneously..
(5) overall structure of the present invention is very simple, not only makes and very easy to use, and can be effective
The use time making LED reaches more than 10,000 hours.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the overcurrent protection output voltage stabilizing circuit of the present invention.
Fig. 3 is the electrical block diagram of the adjusting control circuit of the present invention.
Fig. 4 is the electrical block diagram of the electric current bootstrapping amplifying 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, electric current bootstrapping amplifying circuit, brightness adjustment control
Circuit, overcurrent protection output voltage stabilizing circuit, reference correction circuit, slope equalizer, and logic buffering
Circuit forms.Described reference correction circuit by audion VT1, audion VT2, resistance R1, resistance R2,
Resistance R3, resistance R4, resistance R5, polar capacitor C1, polar capacitor C2, polar capacitor C3, inductance
L, diode D1, and diode D2 form.
During connection, the P pole of diode D2 is connected with the base stage of audion VT1, N pole and audion
The base stage of VT2 is connected.The P pole of diode D1 is connected with the colelctor electrode of audion VT1, N is the most suitable
Secondary it is connected through resistance R2 base stage with audion VT2 after resistance R1.The positive pole warp of polar capacitor C1
After inductance L, the base stage with audion VT2 is connected, negative pole is connected with the N pole of diode D1.Polarity
The positive pole of electric capacity C2 base stage with audion VT2 after resistance R3 is connected, negative pole after resistance R4 with
The emitter stage of audion VT1 is connected.The positive pole of polar capacitor C3 after resistance R5 with audion VT2
Colelctor electrode be connected, negative pole be connected with the GND pin of control chip U1 after ground connection.
The grounded collector of described audion VT1；The positive pole of described polar capacitor C1 is with diode D1's
N pole is collectively forming the input of reference correction circuit；The emitter stage of described audion VT2 is as N Reference Alignment
The outfan of circuit is also connected with the positive pole of polar capacitor C8.
Further, described slope equalizer is by audion VT3, resistance R13, resistance R14, adjustable
Resistance R15, resistance R16, polar capacitor C6, and polar capacitor C7 form.
During connection, the negative pole of polar capacitor C6 is connected with the LD pin of control chip U1, positive pole and three
The base stage of pole pipe VT3 is connected.The positive pole of polar capacitor C7 after resistance R16 with audion VT3 send out
Emitter-base bandgap grading is connected, negative pole is sequentially connected through resistance R14 RL pin with control chip U1 after resistance R13
Connect.One end of adjustable resistance R15 is connected with the colelctor electrode of audion VT3, the other end and polar capacitor C7
Negative pole be connected after ground connection.
Meanwhile, described logic buffer circuit by field effect transistor MOS1, field effect transistor MOS2, resistance R6,
Resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, polar capacitor C4,
Polar capacitor C5, Zener diode D3, diode D4, and diode D5 form.
During connection, the P pole of diode D5 sequentially after resistance R12 and resistance R11 with control chip U1
CS pin be connected, N pole is connected with the source electrode of field effect transistor MOS2.One end of resistance R10 with
The negative pole of polar capacitor C15 is connected, the other end is connected with the grid of field effect transistor MOS2.Diode
The N pole of D4 is connected with the source electrode of field effect transistor MOS1, P pole after resistance R9 with control chip U1
VIN pin be connected.
Wherein, the negative pole of polar capacitor C5 is connected with the drain electrode of field effect transistor MOS2, positive pole is through resistance
After R8, the drain electrode with field effect transistor MOS2 is connected.One end of resistance R6 and the leakage of field effect transistor MOS1
Pole is connected, the other end is connected with the OUT pin of voltage stabilizing chip U2.The positive pole warp of polar capacitor C4
After resistance R7 the grid with field effect transistor MOS1 be connected, minus earth.The P pole of diode D3 and pole
The negative pole of property electric capacity C4 is connected, N pole is connected with the OUT pin of voltage stabilizing chip U2.
The N pole of described diode D3 is connected with the positive pole of polar capacitor C4；Described field effect transistor MOS2
Source electrode be connected with the emitter stage of audion VT7；The drain electrode of described field effect transistor MOS2 and polar capacitor
The positive pole of C17 is connected；The positive pole of described polar capacitor C5 is connected with the positive pole of polar capacitor C16.
As in figure 2 it is shown, described overcurrent protection output voltage stabilizing circuit is made up of current foldback circuit and mu balanced circuit；
Described current foldback circuit by audion VT4, audion VT5, resistance R17, resistance R18, resistance R19,
Resistance R20, resistance R21, resistance R22, resistance R23, adjustable resistance R26, resistance R29, polarity electricity
Hold C8, polar capacitor C9, polar capacitor C10, diode D6, and diode D7 composition.
During connection, the negative pole of polar capacitor C9 colelctor electrode with audion VT5 after resistance R21 is connected,
Positive pole colelctor electrode with audion VT4 after resistance R20 is connected.The positive pole of polar capacitor C8 is through resistance
After R17 the positive pole with polar capacitor C9 be connected, negative pole after resistance R18 with the current collection of audion VT4
Pole is connected.
Wherein, the P pole of diode D6 negative pole with polar capacitor C8 after resistance R19 be connected, N
Pole emitter stage with audion VT4 after resistance R22 is connected.The negative pole of polar capacitor C10 is through adjustable electric
Resistance R26 after be connected with the base stage of audion VT5, positive pole after resistance R23 with audion VT4 send out
Emitter-base bandgap grading is connected.The N pole of diode D7 is connected with the colelctor electrode of audion VT5, P pole is through resistance R29
Base stage with audion VT4 is connected afterwards.The positive pole of described polar capacitor C8 is as current foldback circuit
Input；The emitter stage of described audion VT5 and the negative pole of polar capacitor C10 are collectively forming overcurrent protection electricity
The outfan on road.
Further, described mu balanced circuit by voltage stabilizing chip U2, resistance R24, resistance R25, resistance R27,
Resistance R28, polar capacitor C11, and polar capacitor C12 form.
During connection, the positive pole of polar capacitor C12 after resistance R27 with the IN pin phase of voltage stabilizing chip U2
Connect, negative pole be connected with the GND pin of voltage stabilizing chip U2 after ground connection.One end of resistance R28 and polarity
The negative pole of electric capacity C12 is connected, the other end is connected with the OUGT pin of voltage stabilizing chip U2.Polarity electricity
The positive pole holding C11 is sequentially connected through resistance R25 emitter stage with audion VT5 after resistance R24, negative
Pole is connected with the OUT pin of voltage stabilizing chip U2.The IN pin of described voltage stabilizing chip U2 and polar capacitor
The negative pole of C10 is connected, and its OUT pin is connected with logic buffer circuit as the outfan of mu balanced circuit.
As it is shown on figure 3, described adjusting control circuit is by amplifier P1, audion VT6, audion VT7,
Resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, resistance R35, adjustable resistance
R36, resistance R37, resistance R38, adjustable resistance R39, resistance R40, polar capacitor C13, polarity electricity
Hold C14, polar capacitor C15, diode D8, diode D9, diode D10, and diode D11
Composition.
During connection, one end of resistance R30 is connected with the electrode input end of amplifier P1, other end conduct
The input of adjusting control circuit is connected with the GATE pin of control chip U.Polar capacitor C14 is just
Pole negative input with amplifier P1 after resistance R32 is connected, the PWM of negative pole and control chip U
Pin is connected.The negative pole of polar capacitor C15 colelctor electrode with audion VT6 after resistance R38 is connected,
The emitter stage of positive pole and audion VT7 be collectively forming adjusting control circuit outfan and with logic buffer circuit phase
Connect.
Wherein, the N pole of diode D9 sequentially after adjustable resistance R36 and resistance R37 with polar capacitor
The positive pole of C15 is connected, P pole is connected with the outfan of amplifier P1.The N pole and three of diode D10
The base stage of pole pipe VT6 is connected, P pole outfan with amplifier P1 after resistance R35 is connected.Polarity
The negative pole of electric capacity C13 control end with adjustable resistance R36 after resistance R33 is connected, positive pole is through resistance
After R31, the electrode input end with amplifier P1 is connected.
Meanwhile, the N pole of diode D11 negative pole with polar capacitor C15 after resistance R40 be connected, P
Pole is connected with the colelctor electrode of audion VT7.The N pole of diode D8 is sequentially through resistance R34 and adjustable electric
Be connected with the emitter stage of audion VT7 after resistance R39, P pole is connected with the electrode input end of amplifier P1.
The emitter stage of described audion VT6 is connected with the base stage of audion VT7.
As shown in Figure 4, described electric current bootstrapping amplifying circuit by amplifier P2, amplifier P3, audion VT4,
Resistance R41, resistance R42, resistance R43, resistance R44, resistance R45, resistance R46, resistance R47,
Resistance R48, resistance R49, resistance R50, resistance R51, resistance R52, polar capacitor C16, polarity electricity
Hold C17, polar capacitor C18, polar capacitor C19, diode D12, diode D13, and diode
D14 forms.
During connection, after positive electrode resistance R44 of polar capacitor C17 the negative electrode with amplifier P3 be connected,
Minus earth.The negative pole of polar capacitor C16 electrode input end with amplifier P2 after resistance R42 is connected,
Positive pole is collectively forming the input of electric current bootstrapping amplifying circuit with the positive pole of polar capacitor C17 and buffers with logic
Circuit is connected.One end of resistance R41 is connected with the negative input of amplifier P2, other end ground connection.
The negative pole of polar capacitor C18 base stage with audion VT4 after resistance R48 is connected, positive pole and amplifier
The outfan of P2 is connected.One end of resistance R50 is connected with the negative pole of polar capacitor C18, the other end with
The base stage of audion VT8 is connected.
Wherein, the N pole of diode D12 sequentially after resistance R47 and resistance R48 with polar capacitor C18
Negative pole be connected, P pole negative input with amplifier P2 after resistance R43 is connected.Diode
The N pole of D13 is connected with the emitter stage of audion VT4, P pole after resistance R45 with amplifier P3's
Negative input is connected.The negative pole of polar capacitor C19 after resistance R51 with the colelctor electrode of audion VT4
Be connected, positive pole outfan with amplifier P3 after resistance R46 is connected.
Meanwhile, the N pole of diode D14 negative pole with polar capacitor C18 after resistance R49 be connected,
P pole negative pole with polar capacitor C19 after resistance R52 is connected.The negative input of described amplifier P3
Ground connection, the anelectrode of its anelectrode and amplifier P2 be collectively forming electric current bootstrapping amplifying circuit outfan and with
LED group is connected；The negative electrode of described amplifier P2 is connected with the negative electrode of amplifier P3.
During operation, the present invention has under-voltage, overcurrent protection function, can effectively prevent the electronic component of the present invention
Being not damaged by, the present invention electromagnetic interference to external world can eliminate or decay, and is carried out by voltage and current
Locking limits, and makes voltage x current held stationary, and the present invention ratio of anti-electromagnetic interference capability in actual use is existing
The anti-electromagnetic interference capability of some drive systems improves more than 1.5 times, and it can also export stable driving electricity
Stream, effectively guarantees the stability of blue LED lamp brightness.The brightness of LED can be carried out accurately by the present invention
Regulation, the using effect making LED is more preferable so that it is can use in environment not.The present invention bears simultaneously
Loading capability improves more than 80% than the load capacity of existing drive system, thus can drive more simultaneously
LED group, and can effectively extend service life of LED, to meet the demand of people.For preferably
Implementing the present invention, described control chip U1 preferentially have employed the integrated chip of highly sensitive AX9021 to be come
Realize.
According to above-described embodiment, can well realize the present invention.
Claims (10)
1. the adjustable blue-ray LED of brightness is by high stable state high-power driving system, it is characterised in that main
Will by control chip U1, the adjusting control circuit that is all connected with control chip U1, reference correction circuit,
Slope equalizer and logic buffer circuit, the electric current being connected with logic buffer circuit bootstrapping amplifying circuit,
And the overcurrent protection output voltage stabilizing circuit composition being serially connected between reference correction circuit and logic buffer circuit；
Described adjusting control circuit is connected with logic buffer circuit；Described reference correction circuit and logic buffer circuit
It is connected.
A kind of adjustable blue-ray LED of brightness the most according to claim 1 is by high stable state high-power driving
System, it is characterised in that described electric current bootstrapping amplifying circuit is by amplifier P2, amplifier P3, audion
VT4, after positive electrode resistance R44 the negative electrode with amplifier P3 be connected, the polar capacitor C17 of minus earth,
Negative pole electrode input end with amplifier P2 after resistance R42 is connected, positive pole with polar capacitor C17 just
Pole is collectively forming the electric current bootstrapping input of amplifying circuit the polar capacitor being connected with logic buffer circuit
C16, one end is connected with the negative input of amplifier P2, the resistance R41 of other end ground connection, negative pole warp
After resistance R48, the base stage with audion VT4 is connected, positive pole is connected with the outfan of amplifier P2
Polar capacitor C18, one end is connected with the negative pole of polar capacitor C18, the base of the other end and audion VT8
Resistance R50, the N pole that pole is connected sequentially negative with polar capacitor C18 after resistance R47 and resistance R48
The diode D12 that pole is connected, P pole negative input with amplifier P2 after resistance R43 is connected,
N pole is connected with the emitter stage of audion VT4, P pole inputs with the negative pole of amplifier P3 after resistance R45
The diode D13 that is connected of end, negative pole colelctor electrode with audion VT4 after resistance R51 is connected, just
The polar capacitor C19 that pole outfan with amplifier P3 after resistance R46 is connected, and N pole is through resistance
After R49 the negative pole with polar capacitor C18 be connected, P pole negative with polar capacitor C19 after resistance R52
The diode D14 composition that pole is connected；The negative input ground connection of described amplifier P3, its anelectrode with put
The anelectrode of big device P2 is collectively forming the outfan of electric current bootstrapping amplifying circuit and is connected with LED group；
The negative electrode of described amplifier P2 is connected with the negative electrode of amplifier P3.
A kind of adjustable blue-ray LED of brightness the most according to claim 2 is by high stable state high-power driving
System, it is characterised in that described adjusting control circuit by amplifier P1, audion VT6, audion VT7,
One end is connected with the electrode input end of amplifier P1, the other end is as the input of adjusting control circuit and control
The resistance R30 that the GATE pin of coremaking sheet U is connected, positive pole negative with amplifier P1 after resistance R32
The polar capacitor C14 that pole input is connected, negative pole is connected with the PWM pin of control chip U, negative
Pole colelctor electrode with audion VT6 after resistance R38 is connected, the emitter stage of positive pole and audion VT7 altogether
With forming polar capacitor C15, the N pole of adjusting control circuit outfan sequentially through adjustable resistance R36 and resistance
Two poles that after R37, the positive pole with polar capacitor C15 is connected, P pole is connected with the outfan of amplifier P1
Pipe D9, N pole is connected with the base stage of audion VT6, P pole defeated with amplifier P1 after resistance R35
Go out the diode D10 that is connected of end, negative pole control end with adjustable resistance R36 after resistance R33 is connected,
Polar capacitor C13, the N pole that positive pole electrode input end with amplifier P1 after resistance R31 is connected is through electricity
Be connected with the negative pole of polar capacitor C15 after resistance R40, P pole is connected with the colelctor electrode of audion VT7
Diode D11, and N pole sequentially after resistance R34 and adjustable resistance R39 with the transmitting of audion VT7
The diode D8 composition that pole is connected, P pole is connected with the electrode input end of amplifier P1；Described three poles
The emitter stage of pipe VT6 is connected with the base stage of audion VT7.
A kind of adjustable blue-ray LED of brightness the most according to claim 3 is by high stable state high-power driving
System, it is characterised in that described overcurrent protection output voltage stabilizing circuit is connected with reference correction circuit by input
The current foldback circuit connect, the mu balanced circuit being connected with the outfan of current foldback circuit with input forms；
The outfan of described mu balanced circuit is connected with logic buffer circuit.
A kind of adjustable blue-ray LED of brightness the most according to claim 4 is by high stable state high-power driving
System, it is characterised in that described current foldback circuit is by audion VT4, and audion VT5, negative pole is through electricity
Resistance R21 after be connected with the colelctor electrode of audion VT5, positive pole after resistance R20 with audion VT4's
The polar capacitor C9 that colelctor electrode is connected, positive pole positive pole with polar capacitor C9 after resistance R17 is connected,
Polar capacitor C8, the P pole that negative pole colelctor electrode with audion VT4 after resistance R18 is connected is through resistance
After R19 the negative pole with polar capacitor C8 be connected, N pole after resistance R22 with the transmitting of audion VT4
The diode D6 that pole is connected, negative pole base stage with audion VT5 after adjustable resistance R26 is connected,
The polar capacitor C10 that positive pole emitter stage with audion VT4 after resistance R23 is connected, and N pole with
The colelctor electrode of audion VT5 is connected, P pole base stage with audion VT4 after resistance R29 is connected
Diode D7 forms；The positive pole of described polar capacitor C8 is as the input of current foldback circuit；Described three
The emitter stage of pole pipe VT5 and the negative pole of polar capacitor C10 are collectively forming the outfan of current foldback circuit.
A kind of adjustable blue-ray LED of brightness the most according to claim 5 is by high stable state high-power driving
System, it is characterised in that described mu balanced circuit by voltage stabilizing chip U2, positive pole after resistance R27 with voltage stabilizing core
The polarity of ground connection after the IN pin of sheet U2 is connected, negative pole is connected with the GND pin of voltage stabilizing chip U2
Electric capacity C12, one end is connected with the negative pole of polar capacitor C12, the OUGT of the other end and voltage stabilizing chip U2
The resistance R28 that pin is connected, and positive pole sequentially after resistance R25 and resistance R24 with audion VT5
The polar capacitor C11 that emitter stage is connected, negative pole is connected with the OUT pin of voltage stabilizing chip U2 composition；
The described IN pin of voltage stabilizing chip U2 is connected with the negative pole of polar capacitor C10, its OUT pin conduct
The outfan of mu balanced circuit is connected with logic buffer circuit.
A kind of adjustable blue-ray LED of brightness the most according to claim 6 is by high stable state high-power driving
System, it is characterised in that described reference correction circuit is by audion VT1, audion VT2, P pole and three
Diode D2, the P pole that the base stage of pole pipe VT1 is connected, N pole is connected with the base stage of audion VT2 with
The colelctor electrode of audion VT1 is connected, N pole sequentially after resistance R2 and resistance R1 with audion VT2
The diode D1 that is connected of base stage, positive pole base stage with audion VT2 after inductance L is connected, negative pole
The polar capacitor C1 being connected with the N pole of diode D1, positive pole after resistance R3 with audion VT2's
The polar capacitor C2 that base stage is connected, negative pole emitter stage with audion VT1 after resistance R4 is connected,
And positive pole colelctor electrode with audion VT2 after resistance R5 is connected, negative pole is with control chip U1's
GND pin be connected after ground connection polar capacitor C3 composition；The grounded collector of described audion VT1；
The positive pole of described polar capacitor C1 and the N pole of diode D1 are collectively forming the input of reference correction circuit；
The emitter stage of described audion VT2 as reference correction circuit outfan and with the positive pole of polar capacitor C8
It is connected.
A kind of adjustable blue-ray LED of brightness the most according to claim 7 is by high stable state high-power driving
System, it is characterised in that described slope equalizer is by audion VT3, and negative pole is with control chip U1's
The polar capacitor C6 that LD pin is connected, positive pole is connected with the base stage of audion VT3, positive pole is through resistance
After R16 the emitter stage with audion VT3 be connected, negative pole sequentially after resistance R14 and resistance R13 with control
The polar capacitor C7 that the RL pin of coremaking sheet U1 is connected, and the colelctor electrode of one end and audion VT3
Be connected, the other end be connected with the negative pole of polar capacitor C7 after ground connection adjustable resistance R15 composition.
A kind of adjustable blue-ray LED of brightness the most according to claim 8 is by high stable state high-power driving
System, it is characterised in that described logic buffer circuit is by field effect transistor MOS1, field effect transistor MOS2, P
Pole is sequentially connected through resistance R12 CS pin with control chip U1 after resistance R11, N pole is imitated with field
Should the diode D5 that is connected of the source electrode of pipe MOS2, one end is connected with the negative pole of polar capacitor C15, separately
Resistance R10, the N pole that one end is connected with the grid of field effect transistor MOS2 and the source of field effect transistor MOS1
The diode D4 that pole is connected, P pole is connected with the VIN pin of control chip U1 after resistance R9,
Negative pole is connected with the drain electrode of field effect transistor MOS2, positive pole after resistance R8 with field effect transistor MOS2
The polar capacitor C5 that is connected of drain electrode, one end is connected with the drain electrode of field effect transistor MOS1, the other end with surely
The resistance R6 that is connected of OUT pin of pressure chip U2, positive pole after resistance R7 with field effect transistor MOS1
Grid be connected, the polar capacitor C4 of minus earth, and P pole is connected with the negative pole of polar capacitor C4
Connect, diode D3 that N pole is connected with the OUT pin of voltage stabilizing chip U2 composition；Described diode D3
N pole be connected with the positive pole of polar capacitor C4；The source electrode of described field effect transistor MOS2 and audion VT7
Emitter stage be connected；The drain electrode of described field effect transistor MOS2 is connected with the positive pole of polar capacitor C17；
The positive pole of described polar capacitor C5 is connected with the positive pole of polar capacitor C16.
A kind of adjustable blue-ray LED of brightness the most according to claim 9 drives with high stable state is high-power
Dynamic system, it is characterised in that described control chip U1 is the integrated chip of AX9021；Described voltage stabilizing chip
U2 is the integrated chip of CW7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346233.6A CN105960050A (en) | 2016-05-23 | 2016-05-23 | Brightness adjustable high-stability large-power driving system for blue light LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346233.6A CN105960050A (en) | 2016-05-23 | 2016-05-23 | Brightness adjustable high-stability large-power driving system for blue light LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105960050A true CN105960050A (en) | 2016-09-21 |
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ID=56909515
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610346233.6A Withdrawn CN105960050A (en) | 2016-05-23 | 2016-05-23 | Brightness adjustable high-stability large-power driving system for blue light LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105960050A (en) |
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2016
- 2016-05-23 CN CN201610346233.6A patent/CN105960050A/en not_active Withdrawn
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