CN105979633A - Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band - Google Patents
Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band Download PDFInfo
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- CN105979633A CN105979633A CN201610417181.7A CN201610417181A CN105979633A CN 105979633 A CN105979633 A CN 105979633A CN 201610417181 A CN201610417181 A CN 201610417181A CN 105979633 A CN105979633 A CN 105979633A
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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]
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Abstract
The invention discloses a two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for an LED lamp band. The two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply is characterized by mainly comprising a control chip U2, a transformer T, a diode rectifier U1, a source electrode voltage-stabilizing circuit, a voltage-stabilizing diode D1, a polar capacitor C5, a polar capacitor C4, the two-odder active low-pass filter circuit which is connected between the IS pin of the control chip U2 and the source electrode voltage-stabilizing circuit in series, a polar capacitor C3, an overvoltage overcurrent adjustment circuit which is connected with the control chip U2, and the like, wherein the positive electrode of the polar capacitor C3 is connected with the non-dotted terminal of the secondary side inductive coil L3 of the transformer T while the negative electrode of the polar capacitor C3 is connected with the dotted terminal of the secondary side inductive coil L3 of the transformer T. By adoption of the two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply, the high voltage pulse in the voltage and the high current ripple in the current can be effectively adjusted to enable the dynamic states of the voltage and the current to be kept stable, so as to ensure that the two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply can output stable voltage and current.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of LED based on second order active low-pass filter circuit
Light bar 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 based on second order active low-pass filter circuit LED use
Source electrode regulated power supply.
The present invention is achieved through the following technical solutions: LED based on second order active low-pass filter circuit
Band source electrode regulated power supply, mainly by control chip U2, transformator T, diode rectifier U1, it is serially connected in
Source electrode mu balanced circuit between transformator T former limit inductance coil L1 and control chip U2, is serially connected in control core
Second order active low-pass filter circuit between IS pin and the source electrode mu balanced circuit of sheet 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 Zener diode D1 that pole is connected with the VCC pin of control chip U2, positive pole is with control chip U2's
The polarity that VCC pin is connected, negative pole is connected with the GND pin of control chip U2 after resistance R16
Electric capacity C5, negative pole non-same polarity of limit inductance coil L2 former with transformator T after adjustable resistance R5 is connected,
The polar capacitor C4 that positive pole is connected with the VCC pin of control chip U2, positive pole and transformator T secondary electricity
The non-same polarity of sense coil L3 is connected, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3
The polar capacitor C3 connect, and the over-voltage and over-current adjustment circuit composition being connected with control chip U2；Described
The minus earth of polar capacitor 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.
Described second order active low-pass filter circuit is by amplifier P1, amplifier P2, audion VT3, positive pole
After resistance R20, 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 C10 being connected with the IS pin of control chip U2, positive pole and amplifier P1
Be connected, negative pole after resistance R21 polar capacitor C11, the N pole of ground connection after resistance R24 with amplifier
The diode D7 that the outfan of P1 is connected, P pole positive pole with amplifier P1 after resistance R22 is connected,
Negative pole is connected with the positive pole of amplifier P1, positive pole N pole with diode D7 after resistance R23 is connected
Polar capacitor C12, negative pole positive pole with amplifier P2 after resistance R28 is connected, positive pole and diode
The polar capacitor C13 that the N pole of D7 is connected, one end is connected with the positive pole of polar capacitor C13, the other end
Resistance R25, the N pole of ground connection outfan with amplifier P2 after resistance R30 is connected, P pole is through resistance
Diode D8, the N pole being connected with polar capacitor C positive pole after R29 after resistance R31 with amplifier P2
The diode D9 that outfan is connected, P pole emitter stage with audion VT3 after resistance R27 is connected,
And after positive electrode resistance R26 colelctor electrode with audion VT3 be connected, the N pole of negative pole and diode D9
The polar capacitor C14 composition of ground connection after being connected；The negative pole of described amplifier P2 and the base of audion VT3
Pole is connected, its outfan as second order active low-pass filter circuit outfan and with source electrode mu balanced circuit phase
Connect.
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 MOS, 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 MOS, 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 MOS 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 MOS after resistance R9, and positive pole and change
The Same Name of Ends of depressor T inductance coil L1 is connected, negative pole after resistance R2 with the N of Zener diode D2
The polar capacitor C2 composition that 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) 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 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, second order active low-pass filter circuit, Zener diode D1, source electrode mu balanced circuit, and mistake
Press through stream and adjust 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 the VCC pin of control chip U2
Connect.
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；The input of described diode rectifier U1 is connected with external power source；
The Same Name of Ends of described transformator T secondary inductance coil 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 MOS, 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 MOS 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 MOS, 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 MOS
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 second order active low-pass filter circuit is by amplifier P1, amplifier P2, three poles
Pipe VT3, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, electricity
Resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31, polar capacitor C10,
Polar capacitor C11, polar capacitor C12, polar capacitor C13, polar capacitor C14, diode D7, two
Pole pipe D8, and diode D9 composition.
During connection, after positive electrode resistance R20 of polar capacitor C10 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 C11 is connected with the negative pole of amplifier P1, its negative pole ground connection after resistance R21.Two
The N pole of pole pipe D7 outfan with amplifier P1 after resistance R24 is connected, its P pole is through resistance R22
Positive pole with amplifier P1 is connected afterwards.
Meanwhile, the negative pole of polar capacitor C12 is connected with the positive pole of amplifier P1, its positive pole is through resistance R23
It is connected with the N pole of diode D7 afterwards.The negative pole of polar capacitor C13 after resistance R28 with amplifier P2
Positive pole be connected, its positive pole is connected with the N pole of diode D7.One end of resistance R25 and polarity electricity
The positive pole of appearance C13 is connected, its other end ground connection.The N pole of diode D8 after resistance R30 with amplification
The outfan of device P2 is connected, its P pole is connected with polar capacitor C positive pole after resistance R29.
Wherein, the N pole of diode D9 outfan with amplifier P2 after resistance R31 be connected, its P
Pole emitter stage with audion VT3 after resistance R27 is connected.Positive electrode resistance R26 of polar capacitor C14
Afterwards the colelctor electrode with audion VT3 be connected, its negative pole be connected with the N pole of diode D9 after ground connection.
The negative pole of described amplifier P2 is connected with the base stage of audion VT3, 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.
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 (5)
1. LED source electrode regulated power supply based on second order active low-pass filter circuit, it is characterised in that
Main by control chip U2, transformator T, diode rectifier U1, it is serially connected in transformator T former limit inductor wire
Source electrode mu balanced circuit between circle L1 and control chip U2, is serially connected in IS pin and the source of control chip U2
Second order active low-pass filter circuit between the mu balanced circuit of pole, positive pole exports with the positive pole of diode rectifier U1
Polar capacitor C1, the P pole that end is connected, negative pole is connected with the cathode output end of diode rectifier U1
After resistance R1 the cathode output end with diode rectifier U1 be connected, N pole and control chip U2
The Zener diode D1 that VCC pin is connected, positive pole is connected with the VCC pin of control chip U2,
The polar capacitor C5 that negative pole is connected with the GND pin of control chip U2 after resistance R16, negative pole warp
After adjustable resistance R5 the non-same polarity of limit inductance coil L2 former with transformator T be connected, positive pole and control core
The polar capacitor C4 that the VCC pin of sheet U2 is connected, positive pole is with transformator T secondary inductance coil L3's
The polar capacitor that non-same polarity is connected, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3
C3, and the over-voltage and over-current adjustment circuit composition being connected with control chip U2；Described polar capacitor C1's
Minus earth；The Same Name of Ends of described transformator T inductance coil L1 is connected with the P pole of Zener diode D1；
The Same Name of Ends ground connection of described transformator T inductance coil L2；The GND pin ground connection of described control chip U2.
LED source electrode based on second order active low-pass filter circuit 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 VT3, be connected with the positive pole of amplifier P1 after positive electrode resistance R20, negative pole low as second order active
The input of bandpass filter circuit the polar capacitor C10 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 R21 polar capacitor C11, the N pole of ground connection through electricity
Be connected with the outfan of amplifier P1 after resistance R24, P pole after resistance R22 with the positive pole of amplifier P1
The diode D7 being connected, negative pole is connected with the positive pole of amplifier P1, positive pole after resistance R23 with two
The polar capacitor C12 that the N pole of pole pipe D7 is connected, negative pole after resistance R28 with the positive pole of amplifier P2
Be connected, polar capacitor C13 that positive pole is connected with the N pole of diode D7, one end and polar capacitor C13
Positive pole be connected, resistance R25, the N pole of other end ground connection after resistance R30 with the output of amplifier P2
Diode D8, the N pole that end is connected, P pole is connected with polar capacitor C positive pole after resistance R29 is through electricity
Resistance R31 after be connected with the outfan of amplifier P2, P pole after resistance R27 with audion VT3 send out
The diode D9 that emitter-base bandgap grading is connected, and after positive electrode resistance R26 colelctor electrode with audion VT3 be connected,
Negative pole be connected with the N pole of diode D9 after ground connection polar capacitor C14 composition；Described amplifier P2's
Negative pole is connected with the base stage of audion VT3, its outfan is as the output of second order active low-pass filter circuit
End is also connected with source electrode mu balanced circuit.
LED source electrode based on second order active low-pass filter circuit the most according to claim 2
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.
LED source electrode based on second order active low-pass filter circuit the most according to claim 3
Regulated power supply, it is characterised in that described source electrode mu balanced circuit by audion VT1, field effect transistor MOS, just
Pole outfan with amplifier P2 after resistance R14 is connected, negative pole after resistance R15 with audion VT1
Polar capacitor C7, the P pole that is connected of base stage be connected with the drain electrode of field effect transistor MOS, N pole is through resistance
The diode D3 that after R18, emitter stage with audion VT1 is connected, negative pole after resistance R19 with diode
The polarity electricity that the N pole of D3 is connected, positive pole colelctor electrode with audion VT1 after resistance R17 is connected
Hold C6, N pole be connected with the grid of field effect transistor MOS, P pole after resistance R10 with control chip U2
Limit former with transformator T, diode D4, the N pole inductance coil L1 that is connected of OUT pin non-of the same name
The Zener diode D2 that end is connected, P pole is connected with the source electrode of field effect transistor MOS after resistance R9,
And positive pole is connected with the Same Name of Ends of transformator T inductance coil L1, negative pole after resistance R2 with voltage stabilizing two
The polar capacitor C2 composition that the N pole of pole pipe D2 is connected；The minus earth of described polar capacitor C6.
LED source electrode based on second order active low-pass filter circuit the most according to claim 4
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 |
|---|---|---|---|
| CN201610417181.7A CN105979633A (en) | 2016-06-14 | 2016-06-14 | Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610417181.7A CN105979633A (en) | 2016-06-14 | 2016-06-14 | Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105979633A true CN105979633A (en) | 2016-09-28 |
Family
ID=57010543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610417181.7A Pending CN105979633A (en) | 2016-06-14 | 2016-06-14 | Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band |
Country Status (1)
| Country | Link |
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| CN (1) | CN105979633A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982490A (en) * | 2017-03-30 | 2017-07-25 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp integral control circuit |
-
2016
- 2016-06-14 CN CN201610417181.7A patent/CN105979633A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982490A (en) * | 2017-03-30 | 2017-07-25 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp integral control circuit |
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Application publication date: 20160928 |
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