CN105979635A - Source electrode voltage stabilizing power supply based on overvoltage and overcurrent regulator circuit for LED rope lights - Google Patents
Source electrode voltage stabilizing power supply based on overvoltage and overcurrent regulator circuit for LED rope lights Download PDFInfo
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- CN105979635A CN105979635A CN201610424614.1A CN201610424614A CN105979635A CN 105979635 A CN105979635 A CN 105979635A CN 201610424614 A CN201610424614 A CN 201610424614A CN 105979635 A CN105979635 A CN 105979635A
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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 invention discloses a source electrode voltage stabilizing power supply based on an overvoltage and overcurrent regulator circuit for LED rope lights. The source electrode voltage-stabilized power supply is characterized by mainly comprising a control chip U2, a transformer T, a diode rectifier U1, a discrete bootstrap amplifier circuit, a source electrode voltage stabilizing circuit, a voltage stabilizing diode D1, a polar capacitor C5, a polar capacitor C4, a second-order active lowpass filter circuit connected in series between an IS pin of the control chip U2 and the source electrode voltage stabilizing circuit, a polar capacitor C3 with a positive pole being connected with an unlike end of a secondary side inductance coil L3 of the transformer T and a negative pole being connected with a like end of the secondary side inductance coil L3 of the transformer T, and an overvoltage and overcurrent regulator circuit connected with the control chip U2. The source electrode voltage stabilizing power supply based on an overvoltage and overcurrent regulator circuit is capable of effectively regulating high voltage pulses in a voltage and high-current ripples in a current so as to keep the dynamic stability of the voltage and the current, thus ensuring that the switch power supply can output stable voltage and current.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of LED adjusting circuit based on over-voltage and over-current
Band source electrode regulated power supply.
Background technology
Now with the improving constantly of living standard of people, to the requirement of the landscaping of life the most increasingly
Height, people, for the living environment made oneself beautiful, just use the LED with various light sources to enter indoor
Row beautify, and people are many LED is disposed in the interior the undercut at top in formed beauty the ring of light, this light
Ring can not only beautify living environment, moreover it is possible to bring a kind of beautiful light at night for people.But, existing
The power supply of LED there is output voltage and electric current is unstable, occur when causing LED to use flashing
Situation, thus have impact on the service life of LED.Meanwhile, existing LED power supply there is also
The problem that load capacity is low, thus people's requirement at energy-conservation aspect cannot be met.
Therefore it provides a kind of LED power supply that can export stable voltage and current is the task of top priority.
Summary of the invention
It is an object of the invention to overcome constant current source of the prior art to there is output voltage and electric current is unstable
Fixed, the defect that load capacity is low, it is provided that a kind of LED source electrode adjusting circuit based on over-voltage and over-current
Regulated power supply.
The present invention is achieved through the following technical solutions: a kind of LED adjusting circuit based on over-voltage and over-current
Band source electrode regulated power supply, mainly by control chip U2, transformator T, diode rectifier U1, discrete from
Lifting amplifying circuit, the second order active being serially connected between the IS pin of control chip U2 and source electrode mu balanced circuit is low
Bandpass filter circuit, is serially connected in the source electrode voltage stabilizing between transformator T former limit inductance coil L1 and control chip U2
Circuit, positive pole is connected with the cathode output end of diode rectifier U1, negative pole and diode rectifier U1
Polar capacitor C1, the P pole that is connected of cathode output end after resistance R1 with diode rectifier U1 just
The Zener diode D1 that pole outfan is connected, N pole is connected with discrete bootstrapping amplifying circuit, positive pole and control
The VCC pin of coremaking sheet U2 is connected, negative pole after resistance R16 with the GND pin of control chip U2
The polar capacitor C5 being connected, negative pole limit inductance coil L2 former with transformator T non-after adjustable resistance R5
The polar capacitor C4 that Same Name of Ends is connected, positive pole is connected with the VCC pin of control chip U2, positive pole with
The non-same polarity of transformator T secondary inductance coil L3 is connected, negative pole and transformator T secondary inductance coil
The polar capacitor C3 that the Same Name of Ends of L3 is connected, and the over-voltage and over-current adjustment being connected with control chip U2
Circuit forms；The minus earth of described polar capacitor C1；The Same Name of Ends of described transformator T inductance coil L1
It is connected with the P pole of Zener diode D1；The Same Name of Ends ground connection of described transformator T inductance coil L2；Institute
State the GND pin ground connection of control chip U2, its VCC pin is connected with discrete bootstrapping amplifying circuit.
Described second order active low-pass filter circuit is by amplifier P1, amplifier P2, audion VT6, positive pole
After resistance R32, the positive pole with amplifier P1 is connected, negative pole is as the input of second order active low-pass filter circuit
End the negative pole of the polar capacitor C14 being connected with the IS pin of control chip U2, positive pole and amplifier P1
Be connected, negative pole after resistance R33 polar capacitor C15, the N pole of ground connection after resistance R36 with amplifier
The diode D10 that the outfan of P1 is connected, P pole positive pole with amplifier P1 after resistance R34 is connected,
Negative pole is connected with the positive pole of amplifier P1, positive pole N with diode D10 after resistance R35 is extremely connected
The polar capacitor C16 connect, negative pole positive pole with amplifier P2 after resistance R40 is connected, positive pole and two poles
The polar capacitor C17 that the N pole of pipe D10 is connected, one end is connected with the positive pole of polar capacitor C17, separately
Resistance R37, the N pole of one end ground connection outfan with amplifier P2 after resistance R42 is connected, P pole warp
Diode D11, the N pole being connected with polar capacitor C positive pole after resistance R41 after resistance R43 with amplification
Two poles that the outfan of device P2 is connected, P pole emitter stage with audion VT6 after resistance R39 is connected
Pipe D12, and after positive electrode resistance R38 colelctor electrode with audion VT6 be connected, negative pole and diode
The N pole of D12 be connected after ground connection polar capacitor C18 composition；The negative pole of described amplifier P2 and audion
The base stage of VT6 is connected, its outfan is as the outfan of second order active low-pass filter circuit steady with source electrode
Volt circuit is connected.
Described discrete bootstrapping amplifying circuit by field effect transistor MOS2, audion VT3, audion VT4, three
Pole pipe VT5, positive pole is sequentially connected through resistance R24 base stage with audion VT3 after adjustable resistance R26,
Negative pole is as the input of discrete bootstrapping amplifying circuit the polarity that is connected with the N pole of Zener diode D1
Electric capacity C10, one end is connected with the negative pole of polar capacitor C10, the resistance R22 of other end ground connection, positive pole
Be connected with the colelctor electrode of audion VT3, polar capacitor C11, the P pole of minus earth and polar capacitor C10
The diode that positive pole is connected, N pole negative pole with polar capacitor C11 after adjustable resistance R23 is connected
D7, N pole source electrode with field effect transistor MOS2 after resistance R25 is connected, P pole is sequentially through resistance R20
The diode D8 being connected with negative pole with polar capacitor C10 after resistance R21, positive pole is after resistance R28
Be connected with the base stage of audion VT4, polar capacitor that negative pole is connected with the emitter stage of audion VT3
C12, one end is connected with the grid of field effect transistor MOS2, the positive pole phase of the other end and polar capacitor C12
The adjustable resistance R27 connected, positive pole drain electrode with field effect transistor MOS2 after resistance R29 is connected, negative
The polar capacitor C13 that pole is connected with the emitter stage of audion VT5, and P pole after resistance R30 with three
The colelctor electrode of pole pipe VT5 is connected, N pole emitter stage with audion VT4 after resistance R31 is connected
Diode D9 forms；The base stage of described audion VT5 is connected with the colelctor electrode of audion VT4, and these are three years old
The colelctor electrode of pole pipe VT5 as the outfan of discrete bootstrapping amplifying circuit and is managed with the VCC of control chip U2
Foot is connected；The N pole ground connection of described diode D9.
Described over-voltage and over-current adjust circuit by audion VT2, P pole sequentially after resistance R3 and resistance R4 with
The VREF pin of control chip U2 is connected, N pole is managed with the RT of control chip U2 after resistance R11
The diode D5 that foot is connected, positive pole is connected with the RT pin of control chip U2, negative pole and audion
Polar capacitor C8, the P pole that the colelctor electrode of VT2 is connected sequentially after resistance R7 and resistance R6 with control core
The FB pin of sheet U2 is connected, N pole emitter stage with audion VT2 after resistance R13 is connected two
Pole pipe D6, and positive pole base stage with audion VT2 after resistance R12 is connected, negative pole is through adjustable electric
The polar capacitor C9 composition being connected with the SS pin of control chip U2 after resistance R8；Described audion VT2
Grounded collector.
Described source electrode mu balanced circuit by audion VT1, field effect transistor MOS1, positive pole after resistance R14 with
The outfan of amplifier P2 is connected, negative pole base stage with audion VT1 after resistance R15 is connected
Polar capacitor C7, P pole is connected with the drain electrode of field effect transistor MOS1, N pole after resistance R18 with three poles
The diode D3 that the emitter stage of pipe VT1 is connected, negative pole after resistance R19 with the N pole phase of diode D3
Connect, polar capacitor C6, N pole that positive pole colelctor electrode with audion VT1 after resistance R17 is connected with
The grid of field effect transistor MOS1 is connected, P pole after resistance R10 with the OUT pin of control chip U2
The non-same polarity of limit former with transformator T, diode D4, the N pole inductance coil L1 being connected is connected, P
The Zener diode D2 that pole is connected with the source electrode of field effect transistor MOS1 after resistance R9, and positive pole with
The Same Name of Ends of transformator T inductance coil L1 is connected, negative pole after resistance R2 with Zener diode D2's
The polar capacitor C2 composition that N pole is connected；The minus earth of described polar capacitor C6.
For the practical effect of the present invention, described control chip U2 the most preferentially uses FAN7554 integrated
Chip realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) current ripple high in the high voltage pulse in voltage and electric current can effectively be adjusted by the present invention
Whole, make the dynamic held stationary of voltage and current, ensure that the present invention can export stable voltage and electricity
Stream, and ensure that the stability that LED is luminous.
(2) harmonic wave in electric current can be eliminated or suppress by the present invention, and the ripple making electric current is smoother, thus
Improve the stability of the electric current of present invention output.
(3) present invention has the advantages that input impedance is high, output impedance is low, can effectively carry High Output Current
Power, thus improve the load capacity of the present invention.
(4) control chip of the present invention have employed the integrated chip of FAN7554 and realizes, the work of this chip
Stable performance, can effectively be carried out the intensity of output electric current after this chip combines with peripheral circuit simultaneously
Adjust, thus improve the load capacity of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the discrete bootstrapping amplifying circuit of the present invention.
Fig. 3 is the electrical block diagram of the second order active low-pass 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 U2, transformator T, diode rectifier U1,
Resistance R1, adjustable resistance R5, resistance R16, polar capacitor C1, polar capacitor C3, polar capacitor C4,
Polar capacitor C5, Zener diode D1, second order active low-pass filter circuit, discrete bootstrapping amplifying circuit, source
Pole mu balanced circuit, and over-voltage and over-current adjustment circuit composition.
During connection, second order active low-pass filter circuit is serially connected in IS pin and the source electrode voltage stabilizing of control chip U2
Between circuit.Source electrode mu balanced circuit be serially connected in transformator T former limit inductance coil L1 and control chip U2 it
Between.The positive pole of polar capacitor C1 is connected with the cathode output end of diode rectifier U1, its negative pole and two
The cathode output end of pole pipe commutator U1 is connected.The P pole of Zener diode D1 after resistance R1 with two
The cathode output end of pole pipe commutator U1 is connected, its N pole is connected with discrete bootstrapping amplifying circuit.
Meanwhile, the positive pole of polar capacitor C5 be connected with the VCC pin of control chip U2, its negative pole warp
After resistance R16, the GND pin with control chip U2 is connected.The negative pole of polar capacitor C4 is through adjustable electric
After resistance R5 the non-same polarity of limit inductance coil L2 former with transformator T be connected, its positive pole and control chip U2
VCC pin be connected.The positive pole of polar capacitor C3 is non-same with transformator T secondary inductance coil L3's
End is connected name, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3.Over-voltage and over-current adjusts
Circuit is connected with control chip U2.
The minus earth of described polar capacitor C1；The Same Name of Ends of described transformator T inductance coil L1 and voltage stabilizing
The P pole of diode D1 is connected；The Same Name of Ends ground connection of described transformator T inductance coil L2；Described control
The GND pin ground connection of chip U2, its VCC pin are connected with discrete bootstrapping amplifying circuit；Described two
The input of pole pipe commutator U1 is connected with external power source；Described transformator T secondary inductance coil of the same name
End is connected with LED respectively with non-same polarity.
Further, described over-voltage and over-current adjusts circuit by audion VT2, resistance R3, resistance R4, electricity
Resistance R6, resistance R7, adjustable resistance R8, resistance R11, resistance R12, resistance R13, polar capacitor C8,
Polar capacitor C9, diode D5, and diode D6 form.
During connection, the P pole of diode D5 sequentially after resistance R3 and resistance R4 with control chip U2's
VREF pin is connected, its N pole RT pin with control chip U2 after resistance R11 is connected.Pole
Property the positive pole of electric capacity C8 be connected with the RT pin of control chip U2, the collection of its negative pole and audion VT2
Electrode is connected.The P pole of diode D6 sequentially after resistance R7 and resistance R6 with control chip U2's
FB pin is connected, its N pole emitter stage with audion VT2 after resistance R13 is connected.Polarity electricity
The positive pole base stage with audion VT2 after resistance R12 holding C9 is connected, its negative pole is through adjustable resistance R8
It is connected with the SS pin of control chip U2 afterwards.The grounded collector of described audion VT2.
Further, described source electrode mu balanced circuit by audion VT1, field effect transistor MOS1, resistance R2,
Resistance R9, resistance R10, resistance R14, resistance R15, resistance R17, resistance R18, resistance R19,
Polar capacitor C2, polar capacitor C6, polar capacitor C7, Zener diode D2, diode D3, and
Diode D4 forms.
During connection, the positive pole of polar capacitor C7 outfan with amplifier P2 after resistance R14 is connected,
Its negative pole base stage with audion VT1 after resistance R15 is connected.The P pole of diode D3 and field effect
The drain electrode of pipe MOS1 is connected, its N pole emitter stage with audion VT1 after resistance R18 is connected.
The negative pole of polar capacitor C6 N pole with diode D3 after resistance R19 is connected, its positive pole is through resistance
After R17, the colelctor electrode with audion VT1 is connected.
Meanwhile, the N pole of diode D4 is connected with the grid of field effect transistor MOS1, its P pole is through resistance
After R10, the OUT pin with control chip U2 is connected.The N pole of Zener diode D2 and transformator T
The non-same polarity of former limit inductance coil L1 is connected, its P pole after resistance R9 with field effect transistor MOS1
Source electrode is connected.The positive pole of polar capacitor C2 is connected with the Same Name of Ends of transformator T inductance coil L1, it
Negative pole N pole with Zener diode D2 after resistance R2 is connected.The negative pole of described polar capacitor C6 connects
Ground.
As in figure 2 it is shown, described discrete bootstrapping amplifying circuit is by field effect transistor MOS2, audion VT3, three
Pole pipe VT4, audion VT5, resistance R20, resistance R21, resistance R22, adjustable resistance R23, resistance
R24, resistance R25, adjustable resistance R26, resistance R27, resistance R28, resistance R29, resistance R30,
Resistance R31, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, two poles
Pipe D7, diode D8, and diode D9 form.
During connection, the positive pole of polar capacitor C10 sequentially after resistance R24 and adjustable resistance R26 with three poles
The base stage of pipe VT3 is connected, its negative pole as discrete bootstrapping amplifying circuit input and and Zener diode
The N pole of D1 is connected.One end of resistance R22 is connected with the negative pole of polar capacitor C10, its other end
Ground connection.The positive pole of polar capacitor C11 is connected with the colelctor electrode of audion VT3, its minus earth.Two poles
The P pole of pipe D7 is connected with the positive pole of polar capacitor C10, its N pole after adjustable resistance R23 with polarity
The negative pole of electric capacity C11 is connected.
Meanwhile, the N pole of diode D8 source electrode with field effect transistor MOS2 after resistance R25 be connected,
Its P pole is sequentially connected through resistance R20 negative pole with polar capacitor C10 after resistance R21.Polar capacitor
The positive pole of C12 base stage with audion VT4 after resistance R28 is connected, its negative pole is with audion VT3's
Emitter stage is connected.One end of adjustable resistance R27 is connected with the grid of field effect transistor MOS2, its another
End is connected with the positive pole of polar capacitor C12.The positive pole of polar capacitor C13 after resistance R29 with field effect
The drain electrode of pipe MOS2 is connected, its negative pole is connected with the emitter stage of audion VT5.Diode D9's
P pole colelctor electrode with audion VT5 after resistance R30 is connected, its N pole after resistance R31 with three poles
The emitter stage of pipe VT4 is connected.
The base stage of described audion VT5 is connected with the colelctor electrode of audion VT4, this audion VT5's
Colelctor electrode as the outfan of discrete bootstrapping amplifying circuit and is connected with the VCC pin of control chip U2；
The N pole ground connection of described diode D9.
As it is shown on figure 3, described second order active low-pass filter circuit is by amplifier P1, amplifier P2, three poles
Pipe VT6, resistance R32, resistance R33, resistance R34, resistance R35, resistance R36, resistance R37, electricity
Resistance R38, resistance R39, resistance R40, resistance R41, resistance R42, resistance R43, polar capacitor C14,
Polar capacitor C15, polar capacitor C16, polar capacitor C17, polar capacitor C18, diode D10, two
Pole pipe D11, and diode D12 composition.
During connection, after positive electrode resistance R32 of polar capacitor C14 the positive pole with amplifier P1 be connected, its
Negative pole as the input of second order active low-pass filter circuit and is connected with the IS pin of control chip U2.
The positive pole of polar capacitor C15 is connected with the negative pole of amplifier P1, its negative pole ground connection after resistance R33.Two
The N pole of pole pipe D10 outfan with amplifier P1 after resistance R36 is connected, its P pole is through resistance R34
Positive pole with amplifier P1 is connected afterwards.
Meanwhile, the negative pole of polar capacitor C16 is connected with the positive pole of amplifier P1, its positive pole is through resistance R35
It is connected with the N pole of diode D10 afterwards.The negative pole of polar capacitor C17 after resistance R40 with amplifier
The positive pole of P2 is connected, its positive pole is connected with the N pole of diode D10.One end of resistance R37 and polarity
The positive pole of electric capacity C17 is connected, its other end ground connection.The N pole of diode D11 after resistance R42 with put
The outfan of big device P2 is connected, its P pole is connected with polar capacitor C positive pole after resistance R41.
Wherein, the N pole of diode D12 outfan with amplifier P2 after resistance R43 be connected, its
P pole emitter stage with audion VT6 after resistance R39 is connected.Positive electrode resistance R38 of polar capacitor C18
Afterwards the colelctor electrode with audion VT6 be connected, its negative pole be connected with the N pole of diode D12 after ground connection.
The negative pole of described amplifier P2 is connected with the base stage of audion VT6, its outfan is as second order active low pass
The outfan of filter circuit is also connected with source electrode mu balanced circuit.
During operation, current ripple high in the high voltage pulse in voltage and electric current can effectively be carried out by the present invention
Adjust, make the dynamic held stationary of voltage and current, ensure that the present invention can export stable voltage and
Electric current.Harmonic wave in electric current can be eliminated or suppress by the present invention, and the ripple making electric current is smoother, thus carries
The stability of the electric current of high present invention output.The present invention has the advantages that input impedance is high, output impedance is low,
Can effectively carry the power of High Output Current, thus improve the load capacity of the present invention.
Meanwhile, the control chip of the present invention have employed the integrated chip of FAN7554 and realizes, the work of this chip
Stable performance, can effectively be carried out the intensity of output electric current after this chip combines with peripheral circuit simultaneously
Adjust, thus improve the load capacity of the present invention.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. the LED source electrode regulated power supply adjusting circuit based on over-voltage and over-current, it is characterised in that
Main by control chip U2, transformator T, diode rectifier U1, discrete bootstrapping amplifying circuit, it is serially connected in
Second order active low-pass filter circuit between IS pin and the source electrode mu balanced circuit of control chip U2, is serially connected in
Source electrode mu balanced circuit between transformator T former limit inductance coil L1 and control chip U2, positive pole and diode
The cathode output end of commutator U1 is connected, negative pole is connected with the cathode output end of diode rectifier U1
Polar capacitor C1, P pole cathode output end with diode rectifier U1 after resistance R1 be connected, N
The VCC pipe of the Zener diode D1 that pole is connected with discrete bootstrapping amplifying circuit, positive pole and control chip U2
The polar capacitor that foot is connected, negative pole is connected with the GND pin of control chip U2 after resistance R16
C5, negative pole non-same polarity of limit inductance coil L2 former with transformator T after adjustable resistance R5 is connected, just
The polar capacitor C4 that pole is connected with the VCC pin of control chip U2, positive pole and transformator T secondary inductance
The non-same polarity of coil L3 is connected, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3
Polar capacitor C3, and the over-voltage and over-current that is connected with control chip U2 adjusts circuit composition；Described pole
The minus earth of property electric capacity C1；The Same Name of Ends of described transformator T inductance coil L1 and Zener diode D1
P pole be connected；The Same Name of Ends ground connection of described transformator T inductance coil L2；Described control chip U2's
GND pin ground connection, its VCC pin are connected with discrete bootstrapping amplifying circuit.
A kind of LED source electrode adjusting circuit based on over-voltage and over-current the most according to claim 1
Regulated power supply, it is characterised in that described second order active low-pass filter circuit by amplifier P1, amplifier P2,
Audion VT6, be connected with the positive pole of amplifier P1 after positive electrode resistance R32, negative pole low as second order active
The input of bandpass filter circuit the polar capacitor C14 being connected with the IS pin of control chip U2, positive pole
Be connected with the negative pole of amplifier P1, negative pole after resistance R33 polar capacitor C15, the N pole of ground connection through electricity
Be connected with the outfan of amplifier P1 after resistance R36, P pole after resistance R34 with the positive pole of amplifier P1
The diode D10 being connected, negative pole is connected with the positive pole of amplifier P1, positive pole after resistance R35 with two
The polar capacitor C16 that the N pole of pole pipe D10 is connected, negative pole after resistance R40 with amplifier P2 just
The polar capacitor C17 that pole is connected, positive pole is connected with the N pole of diode D10, one end and polar capacitor
The positive pole of C17 is connected, resistance R37, the N pole of other end ground connection after resistance R42 with amplifier P2's
The diode D11, N that outfan is connected, P pole is connected with polar capacitor C positive pole after resistance R41
Pole outfan with amplifier P2 after resistance R43 is connected, P pole after resistance R39 with audion VT6
The diode D12 that is connected of emitter stage, and after positive electrode resistance R38 with the colelctor electrode phase of audion VT6
Connect, negative pole be connected with the N pole of diode D12 after ground connection polar capacitor C18 form；Described amplification
The negative pole of device P2 is connected with the base stage of audion VT6, its outfan is as second order active low-pass filter circuit
Outfan and be connected with source electrode mu balanced circuit.
A kind of LED source electrode adjusting circuit based on over-voltage and over-current the most according to claim 2
Regulated power supply, it is characterised in that described discrete bootstrapping amplifying circuit by field effect transistor MOS2, audion VT3,
Audion VT4, audion VT5, positive pole sequentially after resistance R24 and adjustable resistance R26 with audion
The base stage of VT3 is connected, negative pole as discrete bootstrapping amplifying circuit input and with Zener diode D1
The polar capacitor C10 that is connected of N pole, one end is connected with the negative pole of polar capacitor C10, another termination
The resistance R22 on ground, positive pole is connected with the colelctor electrode of audion VT3, the polar capacitor C11 of minus earth,
P pole is connected with the positive pole of polar capacitor C10, N pole after adjustable resistance R23 with polar capacitor C11's
Diode D7, the N pole that negative pole is connected source electrode with field effect transistor MOS2 after resistance R25 is connected,
The diode D8 that P pole is sequentially connected through resistance R20 negative pole with polar capacitor C10 after resistance R21,
Positive pole base stage with audion VT4 after resistance R28 is connected, the emitter stage phase of negative pole and audion VT3
The polar capacitor C12 connected, one end is connected with the grid of field effect transistor MOS2, the other end is electric with polarity
Hold the adjustable resistance R27 that is connected of positive pole of C12, positive pole after resistance R29 with field effect transistor MOS2
The polar capacitor C13 that drain electrode is connected, negative pole is connected with the emitter stage of audion VT5, and P pole
After resistance R30 the colelctor electrode with audion VT5 be connected, N pole after resistance R31 with audion VT4
Emitter stage be connected diode D9 composition；The base stage of described audion VT5 and the collection of audion VT4
Electrode is connected, the colelctor electrode of this audion VT5 as discrete bootstrapping amplifying circuit outfan and with control
The VCC pin of chip U2 is connected；The N pole ground connection of described diode D9.
A kind of LED source electrode adjusting circuit based on over-voltage and over-current the most according to claim 3
Regulated power supply, it is characterised in that described over-voltage and over-current adjusts circuit by audion VT2, P pole sequentially through resistance
R3 is connected with VREF pin with control chip U2 after resistance R4, N pole after resistance R11 with control
The diode D5 that the RT pin of coremaking sheet U2 is connected, positive pole is connected with the RT pin of control chip U2
Connect, polar capacitor C8, P pole that negative pole is connected with the colelctor electrode of audion VT2 sequentially through resistance R7 and
After resistance R6 the FB pin with control chip U2 be connected, N pole after resistance R13 with audion VT2
The diode D6 that is connected of emitter stage, and positive pole after resistance R12 with the base stage phase of audion VT2
The polar capacitor C9 group that connection, negative pole are connected with the SS pin of control chip U2 after adjustable resistance R8
Become；The grounded collector of described audion VT2.
A kind of LED source electrode adjusting circuit based on over-voltage and over-current the most according to claim 4
Regulated power supply, it is characterised in that described source electrode mu balanced circuit by audion VT1, field effect transistor MOS1,
Positive pole outfan with amplifier P2 after resistance R14 is connected, negative pole after resistance R15 with audion
Polar capacitor C7, the P pole that the base stage of VT1 is connected is connected with the drain electrode of field effect transistor MOS1, N pole
The diode D3 that emitter stage with audion VT1 is connected after resistance R18, negative pole is after resistance R19
Be connected with the N pole of diode D3, positive pole colelctor electrode with audion VT1 after resistance R17 is connected
Polar capacitor C6, N pole be connected with the grid of field effect transistor MOS1, P pole after resistance R10 with control
Diode D4, the N pole that the OUT pin of coremaking sheet U2 is connected and transformator T former limit inductance coil L1
The voltage stabilizing two that non-same polarity is connected, P pole is connected with the source electrode of field effect transistor MOS1 after resistance R9
Pole pipe D2, and positive pole is connected with the Same Name of Ends of transformator T inductance coil L1, negative pole is through resistance R2
The polar capacitor C2 composition being connected with the N pole of Zener diode D2 afterwards；Described polar capacitor C6's is negative
Pole ground connection.
A kind of LED source electrode adjusting circuit based on over-voltage and over-current the most according to claim 5
Regulated power supply, it is characterised in that described control chip U2 is the integrated chip of FAN7554.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424614.1A CN105979635A (en) | 2016-06-14 | 2016-06-14 | Source electrode voltage stabilizing power supply based on overvoltage and overcurrent regulator circuit for LED rope lights |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610424614.1A CN105979635A (en) | 2016-06-14 | 2016-06-14 | Source electrode voltage stabilizing power supply based on overvoltage and overcurrent regulator circuit for LED rope lights |
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| CN105979635A true CN105979635A (en) | 2016-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205509A (en) * | 2016-09-22 | 2016-12-07 | 京东方科技集团股份有限公司 | Drive circuit and driving method, backlight, display device and ignition device |
| CN106954303A (en) * | 2017-03-30 | 2017-07-14 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp controls circuit with ripple current suppressive |
-
2016
- 2016-06-14 CN CN201610424614.1A patent/CN105979635A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205509A (en) * | 2016-09-22 | 2016-12-07 | 京东方科技集团股份有限公司 | Drive circuit and driving method, backlight, display device and ignition device |
| CN106205509B (en) * | 2016-09-22 | 2018-11-13 | 京东方科技集团股份有限公司 | Driving circuit and driving method, backlight, display device and ignition device |
| CN106954303A (en) * | 2017-03-30 | 2017-07-14 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp controls circuit with ripple current suppressive |
| CN106954303B (en) * | 2017-03-30 | 2018-10-02 | 乐清市风杰电子科技有限公司 | A kind of electronic energy-saving lamp ripple current suppressive control circuit |
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Application publication date: 20160928 |