CN105916251A - White light LED noise reduction driving system based on base electrode bias circuit - Google Patents
White light LED noise reduction driving system based on base electrode bias circuit Download PDFInfo
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- CN105916251A CN105916251A CN201610387789.XA CN201610387789A CN105916251A CN 105916251 A CN105916251 A CN 105916251A CN 201610387789 A CN201610387789 A CN 201610387789A CN 105916251 A CN105916251 A CN 105916251A
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- resistance
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- positive pole
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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 white light LED noise reduction driving system based on a base electrode bias circuit. The white light LED noise reduction driving system is characterized in that the system is mainly composed of a driving chip U, a capacitor C1 whose negative electrode is grounded and positive electrode is connected with a TRIG pin of the driving chip U successively after a resistor R1 and a resistor R2, a filter circuit serially connected between the positive electrode of the capacitor C1 and the driving chip U, and a capacitor C5 whose positive electrode is connected with the filter circuit after a resistor R6 and negative electrode is grounded. According to the invention, an adopted BN555 integrated chip is combined with a novel peripheral circuit, the phase difference of currents is eliminated, the generation of high frequency self excitation is reduced, the noise reduction capability is improved, and the current noise generated in work is reduced; in addition, the white light LED noise reduction driving system is capable of processing the input current, the current is enabled to be more stable, and an LED is enabled to work more stably.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of white light LEDs noise reduction based on base bias circuit and drive
Dynamic system.
Background technology
At present, due to LED have that energy consumption is low, the feature such as length in service life and safety and environmental protection, it is
Become one of main product of people's life lighting.Along with the universal of LED and people are to quality of life requirement
Improve constantly, this brings new challenge to LED drive system.But, traditional LED drive system
Easily produce high-frequency self-excitation, operationally easily produce the biggest current noise, have a strong impact on the normal of people
Life.
Summary of the invention
It is an object of the invention to overcome traditional LED drive system easily to produce high-frequency self-excitation, operationally
Easily produce the defect of the biggest current noise, it is provided that a kind of white light LEDs noise reduction based on base bias circuit
Drive system.
The purpose of the present invention is achieved through the following technical solutions: a kind of white light LEDs based on base bias circuit
Noise reduction drive system, mainly by driving chip U, minus earth, positive pole are sequentially through resistance R1 and resistance R2
The electric capacity C1 being connected with the TRIG pin of driving chip U afterwards, is serially connected in positive pole and the driving of electric capacity C1
Filter circuit between chip U, positive pole is connected with filter circuit after resistance R6, the electric capacity of minus earth
C5, positive pole is connected with the CONT pin of driving chip U, negative pole after resistance R7 with electric capacity C5's
The electric capacity C3 that negative pole is connected, the base bias circuit being connected with the positive pole of electric capacity C1, and be serially connected in
Gate switch between OUT pin and the base bias circuit of driving chip U triggers circuit composition；Described drive
The RE pin of dynamic chip U is all connected with filter circuit with VCC pin, its DIS pin and THRE manage
Foot and OUT pin all positive poles with electric capacity C5 are connected, its GND pin then with the negative pole of electric capacity C5
It is connected.
Further, described base bias circuit is by amplifier P, audion VT2, audion VT3, three
Pole pipe VT4, negative pole is connected with the negative pole of amplifier P, positive pole is then as the input of this base bias circuit
The electric capacity C7 of end, positive pole is connected with the negative pole of amplifier P, the electric capacity C8 of minus earth, with electric capacity C8
The resistance R12 being in parallel, one end is connected with the positive pole of electric capacity C8, the other end after resistance R14 with three poles
Resistance R13, the P pole that the colelctor electrode of pipe VT2 is connected is connected with the positive pole of amplifier P, N pole then with
Diode D4, the N pole that the base stage of audion VT2 is connected is connected with the outfan of amplifier P, P pole
Diode D5, the P pole that colelctor electrode with audion VT2 is connected after potentiometer R15 and amplifier P
The diode D6 that outfan is connected, N pole is connected with the base stage of audion VT3, positive pole and audion
The electric capacity that the emitter stage of VT4 is connected, negative pole base stage with audion VT3 after resistance R16 is connected
C9, the resistance R17 being serially connected between the emitter stage of audion VT2 and the base stage of audion VT4, one end with
The electricity of ground connection while the emitter stage of audion VT3 is connected, the other end is connected with the negative pole of electric capacity C9
Resistance R18 composition；The base stage of described audion VT2 is connected with the control end of potentiometer R15, its emitter stage
Then the colelctor electrode with audion VT4 is connected；The colelctor electrode of described audion VT4 forms this base bias electricity
The outfan on road and trigger with gate switch circuit be connected, its base stage then with the colelctor electrode phase of audion VT3
Connect；The input of described base bias circuit is connected with the positive pole of electric capacity C1.
Described filter circuit is connected by the positive pole of one end with electric capacity C1, the other end after resistance R4 with driving
Resistance R3, the N pole that the RE pin of chip U is connected is connected with the positive pole of electric capacity C1, P pole is through electric capacity
The diode D1 of ground connection after C2, and it is serially connected in the positive pole of electric capacity C1 and the VCC pin of driving chip U
Between resistance R5 composition；The N pole of described diode D1 also after resistance R6 with the positive pole of electric capacity C5
It is connected.
Described gate switch triggers circuit by field effect transistor MOS1, field effect transistor MOS2, audion VT1,
The drain electrode with field effect transistor MOS1 after resistance R9 of P pole is connected, N pole after inductance L with base bias
Zener diode D3, P pole ground connection that the outfan of circuit is connected, N pole after resistance R8 with voltage stabilizing two pole
The Zener diode D2 that the N pole of pipe D3 is connected, negative pole is connected with the P pole of Zener diode D2,
The P pole of the electric capacity C4 that positive pole is connected with the grid of field effect transistor MOS1, positive pole and Zener diode D3
Be connected, electric capacity C6 that negative pole is connected with the colelctor electrode of audion VT1, be serially connected in audion VT1's
Resistance R11 between emitter stage and the source electrode of field effect transistor MOS2, and one end and field effect transistor MOS2
Source electrode be connected, the resistance R10 of other end ground connection composition；The grid of described field effect transistor MOS2 with drive
The OUT pin of dynamic chip U is connected, its drain electrode then base stage with audion VT1 is connected；Described three
The base stage of pole pipe VT1 is connected with the source electrode of field effect transistor MOS1, its colelctor electrode then with Zener diode
The N pole of D3 is collectively forming this gate switch and triggers the outfan of circuit.
Described driving chip U is the integrated chip of NE555.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) present invention uses the integrated chip of NE555 to combine novel peripheral circuit, and it can eliminate electric current
Phase contrast, reduces the generation of high-frequency self-excitation, improves the noise reduction capability of the present invention, thus reduce the present invention
The current noise operationally produced.
(2) electric current of input can be processed by the present invention, makes electric current more stable, the most then can make
The work that LED is more stable.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the base bias circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by driving chip U, electric capacity C1, resistance R1, resistance R2, electricity
Resistance R7, electric capacity C3, electric capacity C5, resistance R6, base bias circuit, filter circuit and gate switch are touched
Power Generation Road forms.
During connection, the minus earth of electric capacity C1, its positive pole sequentially after resistance R1 and resistance R2 with driving
The TRIG pin of chip U is connected.Filter circuit be serially connected in the positive pole of electric capacity C1 and driving chip U it
Between.The positive pole of electric capacity C5 is connected with filter circuit after resistance R6, its minus earth.Electric capacity C3's
Positive pole is connected with the CONT pin of driving chip U, its negative pole after resistance R7 with the negative pole of electric capacity C5
It is connected.Base bias circuit is connected with the positive pole of electric capacity C1.Gate switch triggering circuit is then serially connected in and drives
Between OUT pin and the base bias circuit of dynamic chip U.The RE pin of described driving chip U and VCC
Pin is all connected with filter circuit, its DIS pin and THRE pin and OUT pin all and electric capacity
The positive pole of C5 is connected, its GND pin then negative pole with electric capacity C5 is connected.Described electric capacity C1 is just
Pole connects input power.In order to preferably implement the present invention, the described driving chip U integrated chip of preferred NE555
Realize.
Wherein, described filtered electrical routing resistance R3, resistance R4, resistance R5, diode D1 and electric capacity
C2 forms.
During connection, one end of resistance R3 is connected with the positive pole of electric capacity C1, its other end is after resistance R4
It is connected with the RE pin of driving chip U.The N pole of diode D1 is connected with the positive pole of electric capacity C1,
Its P pole is connected with the negative pole of electric capacity C2；The plus earth of described electric capacity C2.String resistance R5 is connected on electricity
Hold between positive pole and the VCC pin of driving chip U of C1.The N pole of described diode D1 is also through resistance
After R6, the positive pole with electric capacity C5 is connected.
It addition, this gate switch triggers circuit by field effect transistor MOS1, field effect transistor MOS2, audion
VT1, inductance L, resistance R8, resistance R9, resistance R10, resistance R11, electric capacity 4, electric capacity C6, surely
Pressure diode D2 and Zener diode D3 composition.
Wherein, the drain electrode with field effect transistor MOS1 after resistance R9 of the P pole of Zener diode D3 be connected,
Its N pole outfan with base bias circuit after inductance L is connected.The P pole of Zener diode D2 connects
Ground, its N pole N pole with Zener diode D3 after resistance R8 is connected.The negative pole of electric capacity C4 is with steady
The P pole of pressure diode D2 is connected, its positive pole is connected with the grid of field effect transistor MOS1.Electric capacity C6
Positive pole be connected with the P pole of Zener diode D3, its negative pole is connected with the colelctor electrode of audion VT1.
Resistance R11 is serially connected between emitter stage and the source electrode of field effect transistor MOS2 of audion VT1.Resistance R10
One end be connected with the source electrode of field effect transistor MOS2, its other end ground connection.
Meanwhile, the grid of described field effect transistor MOS2 be connected with the OUT pin of driving chip U, its
Drain electrode then base stage with audion VT1 is connected.The base stage of described audion VT1 and field effect transistor MOS1
Source electrode be connected, its colelctor electrode then N pole with Zener diode D3 is collectively forming this gate switch and triggers
The outfan of circuit, this gate switch triggers the output termination LED of circuit.
As in figure 2 it is shown, this base bias circuit is by amplifier P, audion VT2, audion VT3, three
Pole pipe VT4, resistance R12, resistance R13, resistance R14, potentiometer R15, resistance R16, resistance R17,
Resistance R18, electric capacity C7, electric capacity C8, electric capacity C9, diode D4, diode D5 and diode D6
Composition.
During connection, the negative pole of electric capacity C7 is connected with the negative pole of amplifier P, its positive pole is then inclined as this base stage
The input of circuits is also connected with the positive pole of electric capacity C1.The positive pole of electric capacity C8 and the negative pole of amplifier P
Be connected, its minus earth.Resistance R12 is in parallel with electric capacity C8.One end of resistance R13 and electric capacity C8
Positive pole be connected, its other end colelctor electrode with audion VT2 after resistance R14 is connected.Diode
The P pole of D4 is connected with the positive pole of amplifier P, its N pole then base stage with audion VT2 is connected.
The N pole of diode D5 is connected with the outfan of amplifier P, its P pole after potentiometer R15 with three poles
The colelctor electrode of pipe VT2 is connected.The P pole of diode D6 is connected with the outfan of amplifier P, its N
Pole is connected with the base stage of audion VT3.The positive pole of electric capacity C9 is connected with the emitter stage of audion VT4,
Its negative pole base stage with audion VT3 after resistance R16 is connected.Resistance R17 is serially connected in audion VT2
Emitter stage and the base stage of audion VT4 between.The emitter stage phase of one end of resistance R18 and audion VT3
Connect, its other end be connected with the negative pole of electric capacity C9 while ground connection.
Meanwhile, the base stage of described audion VT2 be connected with the control end of potentiometer R15, its emitter stage then
It is connected with the colelctor electrode of audion VT4.The colelctor electrode of described audion VT4 forms this base bias circuit
Outfan and after inductance L N pole with Zener diode D3 be connected, its base stage then with audion VT3
Colelctor electrode be connected.
The present invention uses the integrated chip of NE555 to combine novel peripheral circuit, and it can eliminate the phase place of electric current
Difference, reduces the generation of high-frequency self-excitation, improves the noise reduction capability of the present invention, thus reduce the present invention in work
The current noise produced when making.Meanwhile, the electric current of input can be processed by the present invention, makes electric current more
Stable, the most then can make work more stable for LED.
As it has been described above, just can well realize the present invention.
Claims (5)
1. a white light LEDs noise reduction drive system based on base bias circuit, it is characterised in that main
By driving chip U, minus earth, positive pole sequentially after resistance R1 and resistance R2 with the TRIG of driving chip U
The electric capacity C1 that pin is connected, is serially connected in the filter circuit between the positive pole of electric capacity C1 and driving chip U,
Positive pole is connected with filter circuit after resistance R6, the electric capacity C5 of minus earth, positive pole and driving chip U
The electric capacity C3 that CONT pin is connected, negative pole negative pole with electric capacity C5 after resistance R7 is connected,
The base bias circuit being connected with the positive pole of electric capacity C1, and it is serially connected in the OUT pin of driving chip U
With the gate switch between base bias circuit triggers circuit composition；The RE pin of described driving chip U and
VCC pin is all connected with filter circuit, its DIS pin and THRE pin and OUT pin all with
The positive pole of electric capacity C5 is connected, its GND pin then negative pole with electric capacity C5 is connected.
A kind of white light LEDs noise reduction drivetrain based on base bias circuit the most according to claim 1
System, it is characterised in that described base bias circuit by amplifier P, audion VT2, audion VT3,
Audion VT4, negative pole is connected with the negative pole of amplifier P, positive pole then defeated as this base bias circuit
Entering the electric capacity C7 of end, positive pole is connected with the negative pole of amplifier P, the electric capacity C8 of minus earth, with electric capacity
The resistance R12 that C8 is in parallel, one end is connected with the positive pole of electric capacity C8, the other end after resistance R14 with
Resistance R13, the P pole that the colelctor electrode of audion VT2 is connected is connected with the positive pole of amplifier P, N pole
Diode D4, the N pole that then base stage with audion VT2 is connected is connected with the outfan of amplifier P,
Diode D5, P pole that P pole colelctor electrode with audion VT2 after potentiometer R15 is connected and amplifier
The diode D6 that the outfan of P is connected, N pole is connected with the base stage of audion VT3, positive pole and three poles
The electric capacity that the emitter stage of pipe VT4 is connected, negative pole base stage with audion VT3 after resistance R16 is connected
C9, the resistance R17 being serially connected between the emitter stage of audion VT2 and the base stage of audion VT4, one end with
The electricity of ground connection while the emitter stage of audion VT3 is connected, the other end is connected with the negative pole of electric capacity C9
Resistance R18 composition；The base stage of described audion VT2 is connected with the control end of potentiometer R15, its emitter stage
Then the colelctor electrode with audion VT4 is connected；The colelctor electrode of described audion VT4 forms this base bias electricity
The outfan on road and trigger with gate switch circuit be connected, its base stage then with the colelctor electrode phase of audion VT3
Connect；The input of described base bias circuit is connected with the positive pole of electric capacity C1.
A kind of white light LEDs noise reduction drivetrain based on base bias circuit the most according to claim 2
System, it is characterised in that described filter circuit is connected by the positive pole of one end with electric capacity C1, the other end is through resistance
Resistance R3, the N pole being connected with the RE pin of driving chip U after R4 is connected with the positive pole of electric capacity C1,
P pole is the diode D1 of ground connection after electric capacity C2, and is serially connected in the positive pole of electric capacity C1 and driving chip U
Resistance R5 composition between VCC pin；The N pole of described diode D1 also after resistance R6 with electric capacity
The positive pole of C5 is connected.
A kind of white light LEDs noise reduction drivetrain based on base bias circuit the most according to claim 3
System, it is characterised in that described gate switch triggers circuit by field effect transistor MOS1, field effect transistor MOS2,
The drain electrode with field effect transistor MOS1 after resistance R9 of audion VT1, P pole is connected, N pole is through inductance L
Zener diode D3, the P pole ground connection that is connected with the outfan of base bias circuit afterwards, N pole are through resistance R8
The P of the Zener diode D2 being connected with the N pole of Zener diode D3 afterwards, negative pole and Zener diode D2
The electric capacity C4 that pole is connected, positive pole is connected with the grid of field effect transistor MOS1, positive pole and Zener diode
The electric capacity C6 that the P pole of D3 is connected, negative pole is connected with the colelctor electrode of audion VT1, is serially connected in three poles
Resistance R11 between emitter stage and the source electrode of field effect transistor MOS2 of pipe VT1, and one end and field effect
The source electrode of pipe MOS2 is connected, the resistance R10 of other end ground connection composition；Described field effect transistor MOS2
Grid is connected with the OUT pin of driving chip U, its drain electrode then base stage with audion VT1 is connected；
The described base stage of audion VT1 is connected with the source electrode of field effect transistor MOS1, its colelctor electrode then with voltage stabilizing two
The N pole of pole pipe D3 is collectively forming this gate switch and triggers the outfan of circuit.
A kind of white light LEDs noise reduction drivetrain based on base bias circuit the most according to claim 4
System, it is characterised in that described driving chip U is the integrated chip of NE555.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387789.XA CN105916251A (en) | 2016-05-31 | 2016-05-31 | White light LED noise reduction driving system based on base electrode bias circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387789.XA CN105916251A (en) | 2016-05-31 | 2016-05-31 | White light LED noise reduction driving system based on base electrode bias circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105916251A true CN105916251A (en) | 2016-08-31 |
Family
ID=56743360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610387789.XA Pending CN105916251A (en) | 2016-05-31 | 2016-05-31 | White light LED noise reduction driving system based on base electrode bias circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105916251A (en) |
-
2016
- 2016-05-31 CN CN201610387789.XA patent/CN105916251A/en active Pending
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Application publication date: 20160831 |