CN106413171A - Current limitation LED constant current power supply based on high-pass filtering circuit - Google Patents
Current limitation LED constant current power supply based on high-pass filtering circuit Download PDFInfo
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- CN106413171A CN106413171A CN201610395772.9A CN201610395772A CN106413171A CN 106413171 A CN106413171 A CN 106413171A CN 201610395772 A CN201610395772 A CN 201610395772A CN 106413171 A CN106413171 A CN 106413171A
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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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- 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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Abstract
The present invention discloses a current limitation LED constant current power supply based on a high-pass filtering circuit. The power supply mainly comprises a control chip U1, a diode rectifier U2, a triode VT1, a resistor R5, a diode D2, a high-pass filtering circuit, an indirect detection-type voltage stability control circuit, a constant current driving circuit, a starting surge current limitation circuit connected with the indirect detection-type voltage stability control circuit and a current bootstrap amplification circuit connected in series between the high-pass filtering circuit and the constant current driving circuit. The current limitation LED constant current power supply eliminates the residual ripple voltage in the input voltage, namely the high-power LED constant current power supply can effectively eliminate the harmonic wave and interference of waves in the current so as to improve the driving efficiency more than 40%; and moreover, the current limitation LED constant current power supply can perform flow measurement of the current and perform effective regulation of the output current so as to allow the power of the current limitation LED constant current power supply to be improved more than 60% compared to the power of the current LED power supply.
Description
Technical field
The present invention relates to electronic applications, specifically, it is a kind of current-starved based on high-pass filtering circuit
LED constant current power supply.
Background technology
LED as novel energy-conserving light source, the features such as with its environmental protection, energy-conservation, life-span length, small volume,
Through extensively being received and adopted by people.Because LED is the sensitive semiconductor device of characteristic, there is negative temperature again
Characteristic, therefore in application process, LED power is in stable, reliable working condition for promoting LED
Play considerable effect.
However, the current LED power using easily is subject to disturbing of the electromagnetic wave of internal system or external environment condition,
Lead to the drive efficiency of LED power low, and output voltage and electric current unstable, cause LED luminance unstable,
Thus have impact on the service life of LED.
Therefore it provides a kind of can export stable voltage and current, the LED that again can improve drive efficiency is permanent
Stream power supply is the task of top priority.
Content of the invention
It is an object of the invention to overcoming LED power of the prior art to be easily subject to internal system or external rings
The interference of the electromagnetic wave in border, has that drive efficiency is low, output voltage and a unstable defect of electric current simultaneously, carries
For a kind of current-starved LED constant current power supply based on high-pass filtering circuit.
The present invention is achieved through the following technical solutions：A kind of current-starved based on high-pass filtering circuit
LED constant current power supply, mainly by control chip U1, diode rectifier U2, audion VT1, one end with
The resistance that the emitter stage of audion VT1 is connected, the other end is connected with the EN pin of control chip U1
R5, N pole is connected with the GND pin of control chip U1, P pole after resistance R6 with audion VT1
The diode D2 that is connected of colelctor electrode, be serially connected in the height between diode rectifier U2 and control chip U1
Bandpass filter circuit, the indirect detection formula voltage stabilizing being connected with control chip U1 and high-pass filtering circuit respectively is controlled
Circuit, the startup ICLC being connected with indirect detection formula controlling circuit of voltage regulation, respectively and
Connect the constant-current drive circuit that detection formula controlling circuit of voltage regulation is connected with control chip U1, and be serially connected in high pass
Electric current bootstrapping amplifying circuit composition between filter circuit and constant-current drive circuit；Described high-pass filtering circuit with
Indirect detection formula controlling circuit of voltage regulation is connected；The base stage of described audion VT1 and the VIN of control chip U1
Pin is connected, and its colelctor electrode is connected with high-pass filtering circuit.
Described startup ICLC, by amplifier P5, audion VT4, audion VT5, is born
Pole is connected with the electrode input end of amplifier P5 after resistance R28, positive pole limits as starting surge current
The input of circuit the polar capacitor C13, one end and the amplification that are connected with indirect detection formula controlling circuit of voltage regulation
The negative input of device P5 is connected, the resistance R29 of the other end and ground connection, and N pole is after resistance R31 with three
The base stage of pole pipe VT4 is connected, P pole is connected with the negative input of amplifier P5 after resistance R30
Diode D10, negative pole is sequentially connected with the emitter stage of audion VT5 after resistance R37 through resistance R36,
The polar capacitor C15 that positive pole is connected with the P pole of diode D10, positive pole after resistance R35 with audion
The polar capacitor of ground connection after the colelctor electrode of VT4 is connected, negative pole is connected with the colelctor electrode of audion VT5
C16, positive pole is connected with the outfan of amplifier P5, negative pole base with audion VT4 after resistance R32
The polar capacitor C14 that pole is connected, P pole is connected with the colelctor electrode of audion VT5, N pole is through resistance R33
The diode D11 being connected with the negative pole of polar capacitor C14 afterwards, and the N pole of one end and diode D11
Be connected, resistance R34 that the other end is connected with the emitter stage of audion VT4 composition；Described audion
, as the outfan starting ICLC, its emitter stage is with audion VT5's for the colelctor electrode of VT4
Base stage is connected.
Described electric current boots amplifying circuit by amplifier P2, amplifier P3, amplifier P4, audion VT3,
Positive pole is connected with the electrode input end of amplifier P2, negative pole as electric current boot amplifying circuit input simultaneously
The polar capacitor C9 being connected with high-pass filtering circuit, negative pole negative pole with amplifier P2 after resistance R20
The polar capacitor C10 that input is connected, positive pole is connected with the outfan of amplifier P2 after resistance R21,
N pole is connected with the outfan of amplifier P2 after resistance R19, P pole after resistance R24 with amplifier
The diode D8 that the outfan of P3 is connected, N pole is connected with the base stage of audion VT3 after resistance R23
Connect, diode D7 that P pole is connected with the positive pole of polar capacitor C10, positive pole after resistance R22 with two poles
The polar capacitor C11 of ground connection after the P pole of pipe D7 is connected, negative pole is connected with the colelctor electrode of audion VT3,
P pole is connected with the negative input of amplifier P4 after resistance R26, N pole after resistance R27 with three poles
The diode D9 that the colelctor electrode of pipe VT3 is connected, and positive pole be connected with the outfan of amplifier P3,
The polar capacitor C12 composition that negative pole is connected with the electrode input end of amplifier P4 after adjustable resistance R25；
The outfan of described amplifier P2 is connected with the electrode input end of amplifier P3；Described amplifier P3's is negative
Pole input end grounding, its outfan is connected with the emitter stage of audion VT3；Described polar capacitor C10's
Minus earth；The outfan of described amplifier P4 as electric current boot amplifying circuit outfan and with constant current drive
Galvanic electricity road is connected.
Further, described high-pass filtering circuit is by audion VT2, the emitter stage of one end and audion VT2
Be connected, inductance L that the other end is connected with the cathode output end of diode rectifier U2, negative pole is through resistance
Be connected with the base stage of audion VT2 after R2, positive pole after resistance R1 with diode rectifier U2 just
The polar capacitor C2 that pole outfan is connected, N pole is connected with the VIN pin of control chip U1, P pole
The diode D1 being connected with the cathode output end of diode rectifier U2 after resistance R3, positive pole is through resistance
Be connected with the cathode output end of diode rectifier U2 after R4, the polar capacitor C3 of minus earth, positive pole
Be connected with the P pole of diode D1, pole that negative pole is connected with the cathode output end of diode rectifier U2
Property electric capacity C1, and N pole be connected with the GND pin of control chip U1, P pole after resistance R6 with
The diode D2 composition that the colelctor electrode of audion VT1 is connected；The positive pole of described polar capacitor C3 and two poles
The cathode output end of pipe commutator U2 is connected；The negative pole of described polar capacitor C1 and the collection of audion VT1
Electrode is connected；The negative pole of described polar capacitor C3 as high-pass filtering circuit an outfan and with indirect
Detection formula controlling circuit of voltage regulation is connected；The SW pipe of the base stage of described audion VT2 and control chip U1
Foot is connected, and its colelctor electrode is connected with the negative pole of polar capacitor C9.
Described indirect detection formula controlling circuit of voltage regulation by amplifier P1, the anelectrode phase of N pole and amplifier P1
Voltage stabilizing two pole that connection, P pole are sequentially connected with the negative pole of polar capacitor C3 after resistance R7 through resistance R8
Pipe D4, negative pole is connected with the FB pin of control chip U1, positive pole is sequentially through adjustable resistance R12 and electricity
The polar capacitor C7 that is connected with the outfan of amplifier P1 after resistance R14, P pole after resistance R15 with pole
The positive pole of property electric capacity C7 is connected, N pole is connected with the negative input of amplifier P1 after resistance R16
Diode D5, negative pole is connected with the outfan of amplifier P1 after resistance R17, positive pole and diode
The polar capacitor C8 that the P pole of D5 is connected, one end is connected with the negative input of amplifier P1, another
The resistance R18 of end ground connection, and P pole be connected with the electrode input end of amplifier P1, N pole and polarity electric
Hold the Zener diode D6 composition that the positive pole of C13 is connected；The negative electrode ground connection of described amplifier P1；Institute
State the negative pole of polar capacitor C7 to drive as another outfan of indirect detection formula controlling circuit of voltage regulation and with constant current
Galvanic electricity road is connected.
Described constant-current drive circuit by field effect transistor MOS, with field effect transistor after positive pole adjustable resistance R11
The polar capacitor of ground connection after the drain electrode of MOS is connected, negative pole is connected with the GND pin of control chip U1
C6, one end is connected with the drain electrode of field effect transistor MOS, the other end is connected with the positive pole of polar capacitor C6
Resistance R13, one end is connected with the outfan of amplifier P4, the grid of the other end and field effect transistor MOS
The resistance R9 that pole is connected, negative pole is connected with the source electrode of field effect transistor MOS after resistance R10, positive pole
The polar capacitor C4 being connected with the outfan of amplifier P4, P pole is connected with the outfan of amplifier P4,
The Zener diode D3 composition that N pole is connected with the negative pole of polar capacitor C6 after polar capacitor C5；Institute
The grid stating field effect transistor MOS is connected with the negative pole of polar capacitor C7；The N of described Zener diode D3
Pole is as the outfan of constant-current drive circuit.
For the practical effect of the present invention, described control chip U1 then preferentially adopts XL6009 integrated
Chip is realizing.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) ripple voltage remaining in input voltage can be eliminated by the present invention, and that is, the present invention can be effective
Eliminate the harmonic wave in electric current and wave interference；The present invention can improve current intensity simultaneously, so that the present invention
Drive efficiency improve more than 40%.
(2) present invention can suppress to surge current in electric current, that is, effectively eliminated electric current because electrical network bear
Opening of carrying is got rid of and the interference of the electromagnetic wave of external environment condition and the surge current that invades, ensures that the present invention's
Output voltage and the stability of electric current.
(3) control chip of the present invention employs XL6009 integrated chip, and this chip and peripheral circuit can solve
Certainly input voltage blood pressure lowering, rectification are unstable, and the problem that electromagnetic interference is excessive, ensure that the present invention
Can the stable voltage and current of output, that is, present invention ensures that the stability of LED brightness.
(4) present invention can carry out flow measurement to electric current, and the electric current of output is effectively adjusted, so that
The output of the present invention can improve 60% about than the output of existing LED power.
(5) present invention can export stable voltage and current, thus the present invention can effectively extend LED
Service life.
Brief description
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the electrical block diagram of the electric current bootstrapping amplifying circuit of the present invention.
Fig. 3 is the electrical block diagram of the startup ICLC of the present invention.
Specific embodiment
With reference to embodiment and its accompanying drawing, the present invention is described in further detail, but the enforcement of the present invention
Mode not limited to this.
Embodiment
As shown in figure 1, the present invention is mainly by control chip U1, diode rectifier U2, audion VT1,
Resistance R5, resistance R6, diode D2, startup ICLC, electric current bootstrapping amplifying circuit,
High-pass filtering circuit, indirect detection formula controlling circuit of voltage regulation, and constant-current drive circuit composition.
During enforcement, one end of resistance R5 is connected with the emitter stage of audion VT1, its other end and control
The EN pin of chip U1 is connected.The N pole of diode D2 is connected with the GND pin of control chip U1
Connect, its P pole is connected with the colelctor electrode of audion VT1 after resistance R6.Electric current bootstrapping amplifying circuit string
It is connected between high-pass filtering circuit and constant-current drive circuit.High-pass filtering circuit is serially connected in diode rectifier U2
And control chip U1 between.Indirect detection formula controlling circuit of voltage regulation respectively with control chip U1 and high-pass filtering
Circuit is connected.Start ICLC to be connected with indirect detection formula controlling circuit of voltage regulation.Constant current
Drive circuit is connected with indirect detection formula controlling circuit of voltage regulation and control chip U1 respectively.Described high-pass filtering
Circuit is connected with indirect detection formula controlling circuit of voltage regulation；The base stage of described audion VT1 and control chip U1
VIN pin be connected, its colelctor electrode is connected with high-pass filtering circuit.The present invention in the specific implementation,
The input of described diode rectifier U2 is connected with external power source.
Further, described high-pass filtering circuit is by audion VT2, resistance R1, resistance R2, resistance R3,
Resistance R4, polar capacitor C1, polar capacitor C2, polar capacitor C3, diode D1, and inductance L
Composition.
During connection, one end of inductance L is connected with the emitter stage of audion VT2, its other end and two poles
The cathode output end of pipe commutator U2 is connected.The negative pole of polar capacitor C2 after resistance R2 with audion
The base stage of VT2 is connected, its positive pole is connected with the cathode output end of diode rectifier U2 after resistance R1
Connect.The N pole of diode D1 is connected with the VIN pin of control chip U1, its P pole is after resistance R3
It is connected with the cathode output end of diode rectifier U2.
Meanwhile, the positive pole of polar capacitor C3 cathode output end with diode rectifier U2 after resistance R4
Be connected, its minus earth.The positive pole of polar capacitor C1 is connected with the P pole of diode D1, its negative pole
It is connected with the cathode output end of diode rectifier U2.The N pole of diode D2 is with control chip U1's
GND pin is connected, its P pole is connected with the colelctor electrode of audion VT1 after resistance R6.
The positive pole of described polar capacitor C3 is connected with the cathode output end of diode rectifier U2；Described pole
The negative pole of property electric capacity C1 is connected with the colelctor electrode of audion VT1；The negative pole conduct of described polar capacitor C3
One outfan of high-pass filtering circuit is simultaneously connected with indirect detection formula controlling circuit of voltage regulation；Described audion
The base stage of VT2 is connected with the SW pin of control chip U1, the negative pole of its colelctor electrode and polar capacitor C9
It is connected.
Further, described indirect detection formula controlling circuit of voltage regulation is by amplifier P1, resistance R7, resistance
R8, adjustable resistance R12, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, pole
Property electric capacity C7, polar capacitor C8, Zener diode D4, diode D5, and Zener diode D6 group
Become.
During connection, the N pole of Zener diode D4 is connected with the anelectrode of amplifier P1, its P is extremely suitable
Secondary it is connected with the negative pole of polar capacitor C3 after resistance R7 through resistance R8.The negative pole of polar capacitor C7 with
The FB pin of control chip U1 is connected, its positive pole sequentially after adjustable resistance R12 and resistance R14 with put
The outfan of big device P1 is connected.The P pole of diode D5 after resistance R15 with polar capacitor C7 just
Pole is connected, its N pole is connected with the negative input of amplifier P1 after resistance R16.
Meanwhile, the negative pole of polar capacitor C8 be connected with the outfan of amplifier P1 after resistance R17, its
Positive pole is connected with the P pole of diode D5.The negative input phase of one end of resistance R18 and amplifier P1
Connect, its other end is grounded.The P pole of Zener diode D6 is connected with the electrode input end of amplifier P1,
Its N pole is connected with the positive pole of polar capacitor C13.The negative electrode ground connection of described amplifier P1；Described pole
Property electric capacity C7 negative pole as indirect detection formula controlling circuit of voltage regulation another outfan and with constant-current driving electricity
Road is connected.
Wherein, described constant-current drive circuit is by field effect transistor MOS, resistance R9, resistance R10, adjustable electric
Resistance R11, resistance R13, polar capacitor C4, polar capacitor C5, polar capacitor C6, and voltage stabilizing two pole
Pipe D3 forms.
During connection, the drain electrode phase with field effect transistor MOS after the positive pole adjustable resistance R11 of polar capacitor C6
Connect, its negative pole is grounded after being connected with the GND pin of control chip U1.One end of resistance R13 and field
The drain electrode of effect pipe MOS is connected, its other end is connected with the positive pole of polar capacitor C6.Resistance R9
One end be connected with the outfan of amplifier P4, its other end is connected with the grid of field effect transistor MOS.
The negative pole of polar capacitor C4 is connected with the source electrode of field effect transistor MOS after resistance R10, its positive pole with put
The outfan of big device P4 is connected.The N pole of Zener diode D3 is connected with the positive pole of polar capacitor C5,
The negative pole of described polar capacitor C5 is connected with the negative pole of polar capacitor C6, the P of described Zener diode D3
Pole is connected with the outfan of amplifier P4.
The grid of described field effect transistor MOS is connected with the negative pole of polar capacitor C7；Described Zener diode
The N pole of D3 as constant-current drive circuit outfan and with start ICLC outfan common
Form the outfan of the present invention, and this outfan is connected with LED light group.
As shown in Fig. 2 described electric current bootstrapping amplifying circuit is by amplifier P2, amplifier P3, amplifier P4,
Audion VT3, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24,
Adjustable resistance R25, resistance R26, resistance R27, polar capacitor C9, polar capacitor C10, polar capacitor
C11, polar capacitor C12, diode D7, diode D8, and diode D9 form.
During connection, the positive pole of polar capacitor C9 is connected with the electrode input end of amplifier P2, its negative pole is made
Input for electric current bootstrapping amplifying circuit is simultaneously connected with high-pass filtering circuit.The negative pole of polar capacitor C10
Be connected with the negative input of amplifier P2 after resistance R20, its positive pole after resistance R21 with amplifier
The outfan of P2 is connected.The N pole of diode D8 outfan phase with amplifier P2 after resistance R19
Connect, its P pole is connected with the outfan of amplifier P3 after resistance R24.
Meanwhile, the N pole of diode D7 be connected with the base stage of audion VT3 after resistance R23, its P
Pole is connected with the positive pole of polar capacitor C10.The positive pole of polar capacitor C11 after resistance R22 with diode
It is grounded after the P pole of D7 is connected, its negative pole is connected with the colelctor electrode of audion VT3.Diode D9's
P pole is connected with the negative input of amplifier P4 after resistance R26, its N pole after resistance R27 with
The colelctor electrode of audion VT3 is connected.The positive pole of polar capacitor C12 is connected with the outfan of amplifier P3
Connect, its negative pole is connected with the electrode input end of amplifier P4 after adjustable resistance R25.
The outfan of described amplifier P2 is connected with the electrode input end of amplifier P3；Described amplifier
The negative input ground connection of P3, its outfan is connected with the emitter stage of audion VT3；Described polar capacitor
The minus earth of C10；The outfan of described amplifier P4 as electric current boot amplifying circuit outfan and with
Constant-current drive circuit is connected.
As shown in figure 3, described startup ICLC is by amplifier P5, audion VT4, three poles
Pipe VT5, resistance R28, resistance R29, resistance R30, resistance R31, resistance R32, resistance R33, electricity
Resistance R34, resistance R35, resistance R36, resistance R37, polar capacitor C13, polar capacitor C14, polarity
Electric capacity C15, polar capacitor C16, diode D10, and diode D11 form.
During connection, the negative pole of the polar capacitor C13 electrode input end phase with amplifier P5 after resistance R28
Connect, its positive pole controls electricity as the input starting ICLC and with indirect detection formula voltage stabilizing
Road is connected.One end of resistance R29 is connected with the negative input of amplifier P5, its other end and ground connection.
N pole be connected with the base stage of audion VT4 after resistance R31, its P pole after resistance R30 with put
The negative input of big device P5 is connected.
Wherein, the negative pole of polar capacitor C15 sequentially after resistance R36 and resistance R37 with audion VT5
Emitter stage be connected, its positive pole is connected with the P pole of diode D10.The positive pole warp of polar capacitor C16
It is connected with the colelctor electrode of audion VT4 after resistance R35, its negative pole is connected with the colelctor electrode of audion VT5
It is grounded after connecing.The positive pole of polar capacitor C14 is connected with the outfan of amplifier P5, its negative pole is through resistance
It is connected with the base stage of audion VT4 after R32.
Meanwhile, the P pole of diode D11 is connected with the colelctor electrode of audion VT5, its N pole is through resistance
It is connected with the negative pole of polar capacitor C14 after R33.The N pole phase of one end of resistance R34 and diode D11
Connect, its other end is connected with the emitter stage of audion VT4.The colelctor electrode conduct of described audion VT4
Start the outfan of ICLC, its emitter stage is connected with the base stage of audion VT5.
During operation, the ripple voltage remaining in input voltage can be eliminated by the present invention, and that is, the present invention can have
The harmonic wave eliminating in electric current of effect and wave interference；The present invention can improve current intensity simultaneously, so that this
The drive efficiency of invention improves more than 40%.The control chip of the present invention employs XL6009 integrated chip,
It is unstable that this chip and peripheral circuit can solve input voltage blood pressure lowering, rectification, and excessive the asking of electromagnetic interference
Topic, thus the present invention can ensure that the stable voltage and current of output, that is, present invention ensures that LED brightness
Stability.
Meanwhile, the present invention can suppress to surge current in electric current, that is, effectively eliminated electric current because of electrical network
The opening of load is got rid of and the interference of the electromagnetic wave of external environment condition and the surge current that invades, ensures that the present invention
Output voltage and electric current stability.The present invention can carry out flow measurement to electric current, and the electric current of output is carried out
Effectively adjust, so that the power of the present invention can improve 60% about than the power of existing LED power.
The present invention can export stable voltage and current, thus the present invention can effectively extend the service life of LED.
According to above-described embodiment, you can realize the present invention well.
Claims (7)
1. a kind of current-starved LED constant current power supply based on high-pass filtering circuit is it is characterised in that lead
Will be by control chip U1, diode rectifier U2, audion VT1, the transmitting of one end and audion VT1
The resistance R5 that pole is connected, the other end is connected with the EN pin of control chip U1, N pole and control core
The GND pin of piece U1 is connected, P pole is connected with the colelctor electrode of audion VT1 after resistance R6
Diode D2, is serially connected in the high-pass filtering circuit between diode rectifier U2 and control chip U1, respectively
The indirect detection formula controlling circuit of voltage regulation being connected with control chip U1 and high-pass filtering circuit, with indirect detection
The startup ICLC that formula controlling circuit of voltage regulation is connected, is controlled with indirect detection formula voltage stabilizing respectively
The constant-current drive circuit that circuit is connected with control chip U1, and it is serially connected in high-pass filtering circuit and constant current drive
Electric current bootstrapping amplifying circuit composition between galvanic electricity road；Described high-pass filtering circuit and indirect detection formula voltage stabilizing control
Circuit processed is connected；The base stage of described audion VT1 is connected with the VIN pin of control chip U1, its
Colelctor electrode is connected with high-pass filtering circuit.
2. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 1
Power supply is it is characterised in that described startup ICLC is by amplifier P5, audion VT4, three
Pole pipe VT5, negative pole is connected with the electrode input end of amplifier P5 after resistance R28, positive pole is as startup
The input of ICLC the polar capacitor being connected with indirect detection formula controlling circuit of voltage regulation
C13, one end is connected with the negative input of amplifier P5, the other end with ground connection resistance R29, N pole
Be connected with the base stage of audion VT4 after resistance R31, P pole after resistance R30 with amplifier P5's
The diode D10 that negative input is connected, negative pole sequentially after resistance R36 and resistance R37 with audion
The polar capacitor C15 that the emitter stage of VT5 is connected, positive pole is connected with the P pole of diode D10, positive pole
It is connected with the colelctor electrode of audion VT4 after resistance R35, negative pole is connected with the colelctor electrode of audion VT5
The polar capacitor C16 of ground connection after connecing, positive pole is connected with the outfan of amplifier P5, negative pole is through resistance R32
The polar capacitor C14 being connected with the base stage of audion VT4 afterwards, the colelctor electrode phase of P pole and audion VT5
Diode D11, Yi Jiyi that connection, N pole are connected with the negative pole of polar capacitor C14 after resistance R33
The resistance that end is connected with the N pole of diode D11, the other end is connected with the emitter stage of audion VT4
R34 forms；The colelctor electrode of described audion VT4 as start ICLC outfan, its
Emitter stage is connected with the base stage of audion VT5.
3. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 2
Power supply is it is characterised in that described electric current bootstrapping amplifying circuit is by amplifier P2, amplifier P3, amplifier
P4, audion VT3, positive pole is connected with the electrode input end of amplifier P2, negative pole is put as electric current bootstrapping
The input of big circuit the polar capacitor C9 being connected with high-pass filtering circuit, negative pole after resistance R20 with
The negative input of amplifier P2 is connected, positive pole is connected with the outfan of amplifier P2 after resistance R21
The polar capacitor C10 connecing, N pole is connected with the outfan of amplifier P2 after resistance R19, P pole is through electricity
The diode D8 that is connected with the outfan of amplifier P3 after resistance R24, N pole after resistance R23 with three poles
The diode D7 that the base stage of pipe VT3 is connected, P pole is connected with the positive pole of polar capacitor C10, positive pole warp
Be connected with the P pole of diode D7 after resistance R22, after negative pole is connected with the colelctor electrode of audion VT3
The polar capacitor C11 of ground connection, P pole is connected with the negative input of amplifier P4 after resistance R26, N
The diode D9 that pole is connected with the colelctor electrode of audion VT3 after resistance R27, and positive pole and amplification
The outfan of device P3 is connected, negative pole is connected with the electrode input end of amplifier P4 after adjustable resistance R25
The polar capacitor C12 composition connecing；The outfan of described amplifier P2 and the electrode input end phase of amplifier P3
Connect；The negative input ground connection of described amplifier P3, its outfan is connected with the emitter stage of audion VT3
Connect；The minus earth of described polar capacitor C10；The outfan of described amplifier P4 is booted as electric current and is amplified
The outfan of circuit is simultaneously connected with constant-current drive circuit.
4. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 3
Power supply it is characterised in that described high-pass filtering circuit is by audion VT2, sent out with audion VT2's by one end
The inductance L that emitter-base bandgap grading is connected, the other end is connected with the cathode output end of diode rectifier U2, negative pole warp
Be connected with the base stage of audion VT2 after resistance R2, positive pole after resistance R1 with diode rectifier U2
The polar capacitor C2 that is connected of cathode output end, N pole is connected with the VIN pin of control chip U1,
The diode D1 that P pole is connected with the cathode output end of diode rectifier U2 after resistance R3, positive pole warp
Be connected with the cathode output end of diode rectifier U2 after resistance R4, the polar capacitor C3 of minus earth,
Positive pole is connected with the P pole of diode D1, negative pole is connected with the cathode output end of diode rectifier U2
Polar capacitor C1, and N pole is connected with the GND pin of control chip U1, P pole is through resistance R6
The diode D2 composition being connected with the colelctor electrode of audion VT1 afterwards；The positive pole of described polar capacitor C3 with
The cathode output end of diode rectifier U2 is connected；The negative pole of described polar capacitor C1 and audion VT1
Colelctor electrode be connected；The negative pole of described polar capacitor C3 as high-pass filtering circuit an outfan and with
Indirect detection formula controlling circuit of voltage regulation is connected；The base stage of described audion VT2 and the SW of control chip U1
Pin is connected, and its colelctor electrode is connected with the negative pole of polar capacitor C9.
5. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 4
Power supply is it is characterised in that described indirect detection formula controlling circuit of voltage regulation is by amplifier P1, N pole and amplifier
The anelectrode of P1 is connected, the P pole sequentially negative pole phase with polar capacitor C3 after resistance R8 and resistance R7
The Zener diode D4 connecting, negative pole is connected with the FB pin of control chip U1, positive pole is sequentially through adjustable
The resistance R12 and polar capacitor C7 being connected with the outfan of amplifier P1 after resistance R14, P pole is through electricity
Resistance R15 after be connected with the positive pole of polar capacitor C7, N pole negative pole with amplifier P1 after resistance R16
The diode D5 that input is connected, negative pole is connected with the outfan of amplifier P1 after resistance R17,
The negative input of the polar capacitor C8 that positive pole is connected with the P pole of diode D5, one end and amplifier P1
Be connected, the other end ground connection resistance R18, and P pole be connected with the electrode input end of amplifier P1,
The Zener diode D6 composition that N pole is connected with the positive pole of polar capacitor C13；Described amplifier P1's is negative
Electrode is grounded；The negative pole of described polar capacitor C7 is as another output of indirect detection formula controlling circuit of voltage regulation
End is simultaneously connected with constant-current drive circuit.
6. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 5
Power supply is it is characterised in that described constant-current drive circuit is by field effect transistor MOS, after positive pole adjustable resistance R11
It is connected with the drain electrode of field effect transistor MOS, negative pole is connected with the GND pin of control chip U1 and is followed by
The polar capacitor C6 on ground, one end is connected with the drain electrode of field effect transistor MOS, the other end and polar capacitor C6
The resistance R13 that is connected of positive pole, one end is connected with the outfan of amplifier P4, the other end and field effect
The resistance R9 that the grid of pipe MOS is connected, negative pole source electrode with field effect transistor MOS after resistance R10
Be connected, polar capacitor C4 that positive pole is connected with the outfan of amplifier P4, P pole is with amplifier P4's
Voltage stabilizing two pole that outfan is connected, N pole is connected with the negative pole of polar capacitor C6 after polar capacitor C5
Pipe D3 forms；The grid of described field effect transistor MOS is connected with the negative pole of polar capacitor C7；Described steady
The N pole of pressure diode D3 is as the outfan of constant-current drive circuit.
7. a kind of current-starved LED constant current based on high-pass filtering circuit according to claim 6
Power supply is it is characterised in that described control chip U1 is XL6009 integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610395772.9A CN106413171A (en) | 2016-06-06 | 2016-06-06 | Current limitation LED constant current power supply based on high-pass filtering circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610395772.9A CN106413171A (en) | 2016-06-06 | 2016-06-06 | Current limitation LED constant current power supply based on high-pass filtering circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106413171A true CN106413171A (en) | 2017-02-15 |
Family
ID=58006417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610395772.9A Pending CN106413171A (en) | 2016-06-06 | 2016-06-06 | Current limitation LED constant current power supply based on high-pass filtering circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106413171A (en) |
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2016
- 2016-06-06 CN CN201610395772.9A patent/CN106413171A/en active Pending
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