CN104602399A - Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system - Google Patents
Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system Download PDFInfo
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Abstract
The invention discloses a linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system. The linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system mainly comprises a voltage transformation circuit, a two-stage low-pass filtering and amplification circuit connected with the voltage transformation circuit, a voltage stabilizing circuit connected with the two-stage low-pass filtering and amplification circuit and an output circuit connected with the output end of the voltage stabilizing circuit and is characterized by further comprising a linear drive circuit connected with the voltage transformation circuit and the two-stage low-pass filtering and amplification circuit simultaneously. The linear drive circuit consists of a drive chip U1, an audion VT5, an audion VT6, an audion VT7, an audion VT8, a polar capacitor C13 and the like, wherein the positive pole of the polar capacitor C13 is connected with the voltage transformation circuit, the negative pole of the polar capacitor C13 is connected with the IN1 tube pin of the drive chip U1 through a resistor R12. The output power of the linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system can be amplified by means of the linear drive circuit, and the system can meet more LED simultaneous usage demands.
Description
Technical field
The present invention relates to a kind of LED information display system, specifically refer to that a kind of two-stage low-pass filtering based on Linear Driving amplifies LED voltage-stabilizing system.
Background technology
LED is called as forth generation lighting source or green light source, has the features such as energy-saving and environmental protection, the life-span is long, volume is little, is widely used in the fields such as various instruction, display, decoration, backlight, general lighting and urban landscape.
In megastore or supermarket, in order to reach better illuminating effect, often use a lot of LED, this just has very high requirement to LED drive system simultaneously.The power that current LED information display system exports is not high, can not meet the needs of some large supermarkets at present.
Summary of the invention
The power that the LED information display system that the object of the invention is to overcome exports is not high, can not meet the defect of the needs of some large supermarkets at present, provides a kind of two-stage low-pass filtering based on Linear Driving of high-power output to amplify LED voltage-stabilizing system.
Object of the present invention is achieved through the following technical solutions: a kind of two-stage low-pass filtering based on Linear Driving amplifies LED voltage-stabilizing system, mainly comprise transforming circuit, the two-stage low-pass filtering amplifying circuit be connected with transforming circuit, the voltage stabilizing circuit be connected with two-stage low-pass filtering amplifying circuit, the output circuit be connected with this circuit output end of pressure-stabilizing, also comprises the linear drive circuit be simultaneously connected with two-stage low-pass filtering amplifying circuit with transforming circuit, described linear drive circuit is by driving chip U1, triode VT5, triode VT6, triode VT7, triode VT8, positive pole is connected with transforming circuit, the polar capacitor C13 that negative pole is connected with the IN1 pin of driving chip U1 after resistance R12, one end is connected with the collector electrode of triode VT5, the resistance R13 that the other end is connected with the base stage of triode VT7 after resistance R14, positive pole is connected with the base stage of triode VT5, the polar capacitor C15 that negative pole is connected with the IN1 pin of driving chip U1, positive pole is connected with the IN2 pin of driving chip U1, the polar capacitor C14 of minus earth, one end is connected with the emitter of triode VT5, the resistance R16 that the other end is connected with the base stage of triode VT6, one end is connected with the base stage of triode VT6, the resistance R15 that the other end is connected with the base stage of triode VT7, N pole is connected with the collector electrode of triode VT5, the diode D6 that P pole is connected with the collector electrode of triode VT6, positive terminal is connected with the collector electrode of triode VT5, the not gate K that end of oppisite phase is connected with triode VT8 collector electrode, one end is connected with triode VT8 emitter, the resistance R18 that the other end is connected with the emitter of triode VT7 after resistance R17, the end of oppisite phase of P pole NAND gate K is connected, the diode D7 that N pole is connected with the tie point of resistance R18 with resistance R17 forms, the VCC pin of described driving chip U1 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with two-stage low-pass filtering amplifying circuit.
Described transforming circuit is by transformer T1, and the former limit circuit being arranged on the former limit of transformer T1 and the secondary circuit being arranged on transformer T1 secondary form; Described former limit circuit is by triode VT1, the resistance R1 that one end is connected with the base stage of triode VT1, the other end is connected with the non-same polarity of transformer T1 former limit inductance coil L2, the resistance C1 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the collector electrode of triode VT1, the diode D1 that P pole is connected with the positive pole of polar capacitor C1, N pole is then connected with the Same Name of Ends of transformer T1 former limit inductance coil L2, negative pole is connected with the Same Name of Ends of transformer T1 former limit inductance coil L1, positive pole forms as the polar capacitor C2 of system one input; The base stage of described triode VT1 is connected with the Same Name of Ends of inductance coil L3 as another input of system, collector electrode, grounded emitter, and the Same Name of Ends of inductance coil L2 is connected with the non-same polarity of inductance coil L1, its non-same polarity is then connected with the Same Name of Ends of inductance coil L3.
The polar capacitor C3 that described secondary circuit is then in parallel by the inductance coil L4 with transformer T1 secondary, the unidirectional thyristor D2 be all in parallel with polar capacitor C3 and resistance R2 forms; Unidirectional thyristor D2 is connected with two-stage low-pass filtering amplifying circuit with a common end of resistance R2, another common end is then connected with the positive pole of electric capacity C13.
Described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT2, triode VT3, positive pole is connected with the non-same polarity of transformer T1 secondary inductance coil L4, the polar capacitor C4 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R3 that the other end is connected with the positive pole of polar capacitor C4, positive pole is connected with amplifier P1 inverting input after resistance R4, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C4, be serially connected in the polar capacitor C6 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C7 that positive pole is connected with the base stage of triode VT2, one end is connected with the collector electrode of triode VT2, the resistance R5 that the other end is connected with the emitter of triode VT3, positive pole is connected with the base stage of triode VT3 after resistance R6, the polar capacitor C8 that negative pole is connected with the output of amplifier P1 and the N pole of diode D7 simultaneously, one end is connected with the positive pole of polar capacitor C8, the resistance R7 that the other end is connected with the inverting input of amplifier P2, the resistance R8 be in parallel with resistance R7, be serially connected in the polar capacitor C9 between the output of amplifier P2 and inverting input, and the resistance R9 be serially connected between the normal phase input end of amplifier P2 and output forms, the emitter of described triode VT2 is connected with the negative pole of electric capacity C8 and voltage stabilizing circuit simultaneously, and the collector electrode of triode VT3 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is connected with voltage stabilizing circuit.
Described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN pin of this three terminal regulator U, emitter is as system one output, the triode VT4 that collector electrode is then connected with the output of amplifier P2, diode D3 between the emitter and collector being serially connected in triode VT4, positive pole is connected with the collector electrode of triode VT4 after resistance R10, the polar capacitor C10 that negative pole is connected with the IN pin of three terminal regulator U after polar capacitor C11, N pole is connected with the positive pole of polar capacitor C10, the diode D4 that P pole is connected with the emitter of triode VT4, positive pole is connected with the OUT pin of three terminal regulator U, the polar capacitor C12 that negative pole is connected with the negative pole of polar capacitor C10 forms, the OUT pin of described three terminal regulator U is connected with the P pole of diode D4, GND pin ground connection, and the negative pole of electric capacity C10 is connected with the negative pole of electric capacity C8.
Described output circuit is made up of inductance L 5, thyristor D5 and resistance R11, described inductance L 5 one end is connected with the emitter of triode VT4, the other end is connected with the negative pole of polar capacitor C12, and thyristor D5 is in parallel with inductance L 5 after connecting with resistance R11 again.
Described driving chip U1 is LM387 integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts linear drive circuit, and it can amplify the power output of LED information display system, the demand making system can meet more LED simultaneously to use.
(2) voltage stabilizing circuit of the present invention can when voltage ripple of power network or load variations time still can export constant voltage, ensure that LED normally works, extend LED useful life.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of linear drive circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, two-stage low-pass filtering based on Linear Driving of the present invention amplifies LED voltage-stabilizing system, mainly comprise transforming circuit, the two-stage low-pass filtering amplifying circuit be connected with transforming circuit, the voltage stabilizing circuit be connected with two-stage low-pass filtering amplifying circuit, the output circuit be connected with this circuit output end of pressure-stabilizing, also comprises the linear drive circuit be simultaneously connected with two-stage low-pass filtering amplifying circuit with transforming circuit.
As shown in Figure 2, described linear drive circuit is by driving chip U1, triode VT5, triode VT6, triode VT7, triode VT8, positive pole is connected with transforming circuit, the polar capacitor C13 that negative pole is connected with the IN1 pin of driving chip U1 after resistance R12, one end is connected with the collector electrode of triode VT5, the resistance R13 that the other end is connected with the base stage of triode VT7 after resistance R14, positive pole is connected with the base stage of triode VT5, the polar capacitor C15 that negative pole is connected with the IN1 pin of driving chip U1, positive pole is connected with the IN2 pin of driving chip U1, the polar capacitor C14 of minus earth, one end is connected with the emitter of triode VT5, the resistance R16 that the other end is connected with the base stage of triode VT6, one end is connected with the base stage of triode VT6, the resistance R15 that the other end is connected with the base stage of triode VT7, N pole is connected with the collector electrode of triode VT5, the diode D6 that P pole is connected with the collector electrode of triode VT6, positive terminal is connected with the collector electrode of triode VT5, the not gate K that end of oppisite phase is connected with triode VT8 collector electrode, one end is connected with triode VT8 emitter, the resistance R18 that the other end is connected with the emitter of triode VT7 after resistance R17, the end of oppisite phase of P pole NAND gate K is connected, the diode D7 that N pole is connected with the tie point of resistance R18 with resistance R17 forms, the VCC pin of described driving chip U1 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with two-stage low-pass filtering amplifying circuit.Linear drive circuit, it can amplify the power output of LED information display system, the demand making system can meet more LED simultaneously to use.In order to ensure implementation result, described driving chip U1 is preferably LM387 integrated chip, its highly sensitive and low price.
Described transforming circuit is by transformer T1, and the former limit circuit being arranged on the former limit of transformer T1 and the secondary circuit being arranged on transformer T1 secondary form; Described former limit circuit is by triode VT1, the resistance R1 that one end is connected with the base stage of triode VT1, the other end is connected with the non-same polarity of transformer T1 former limit inductance coil L2, the resistance C1 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the collector electrode of triode VT1, the diode D1 that P pole is connected with the positive pole of polar capacitor C1, N pole is then connected with the Same Name of Ends of transformer T1 former limit inductance coil L2, negative pole is connected with the Same Name of Ends of transformer T1 former limit inductance coil L1, positive pole forms as the polar capacitor C2 of system one input; The base stage of described triode VT1 is connected with the Same Name of Ends of inductance coil L3 as another input of system, collector electrode, grounded emitter, and the Same Name of Ends of inductance coil L2 is connected with the non-same polarity of inductance coil L1, its non-same polarity is then connected with the Same Name of Ends of inductance coil L3.
The polar capacitor C3 that described secondary circuit is then in parallel by the inductance coil L4 with transformer T1 secondary, the unidirectional thyristor D2 be all in parallel with polar capacitor C3 and resistance R2 forms; Unidirectional thyristor D2 is connected with two-stage low-pass filtering amplifying circuit with a common end of resistance R2, another common end is then connected with the positive pole of electric capacity C13.
Described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT2, triode VT3, positive pole is connected with the non-same polarity of transformer T1 secondary inductance coil L4, the polar capacitor C4 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R3 that the other end is connected with the positive pole of polar capacitor C4, positive pole is connected with amplifier P1 inverting input after resistance R4, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C4, be serially connected in the polar capacitor C6 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C7 that positive pole is connected with the base stage of triode VT2, one end is connected with the collector electrode of triode VT2, the resistance R5 that the other end is connected with the emitter of triode VT3, positive pole is connected with the base stage of triode VT3 after resistance R6, the polar capacitor C8 that negative pole is connected with the output of amplifier P1 and the N pole of diode D7 simultaneously, one end is connected with the positive pole of polar capacitor C8, the resistance R7 that the other end is connected with the inverting input of amplifier P2, the resistance R8 be in parallel with resistance R7, be serially connected in the polar capacitor C9 between the output of amplifier P2 and inverting input, and the resistance R9 be serially connected between the normal phase input end of amplifier P2 and output forms, the emitter of described triode VT2 is connected with the negative pole of electric capacity C8 and voltage stabilizing circuit simultaneously, and the collector electrode of triode VT3 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is connected with voltage stabilizing circuit.
Described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN pin of this three terminal regulator U, emitter is as system one output, the triode VT4 that collector electrode is then connected with the output of amplifier P2, diode D3 between the emitter and collector being serially connected in triode VT4, positive pole is connected with the collector electrode of triode VT4 after resistance R10, the polar capacitor C10 that negative pole is connected with the IN pin of three terminal regulator U after polar capacitor C11, N pole is connected with the positive pole of polar capacitor C10, the diode D4 that P pole is connected with the emitter of triode VT4, positive pole is connected with the OUT pin of three terminal regulator U, the polar capacitor C12 that negative pole is connected with the negative pole of polar capacitor C10 forms, the OUT pin of described three terminal regulator U is connected with the P pole of diode D4, GND pin ground connection, and the negative pole of electric capacity C10 is connected with the negative pole of electric capacity C8.
Described output circuit is made up of inductance L 5, thyristor D5 and resistance R11, described inductance L 5 one end is connected with the emitter of triode VT4, the other end is connected with the negative pole of polar capacitor C12, and thyristor D5 is in parallel with inductance L 5 after connecting with resistance R11 again.
As mentioned above, just well the present invention can be implemented.
Claims (6)
1. the two-stage low-pass filtering based on Linear Driving amplifies LED voltage-stabilizing system, mainly comprise transforming circuit, the two-stage low-pass filtering amplifying circuit be connected with transforming circuit, the voltage stabilizing circuit be connected with two-stage low-pass filtering amplifying circuit, the output circuit be connected with this circuit output end of pressure-stabilizing, is characterized in that: also comprise the linear drive circuit be simultaneously connected with two-stage low-pass filtering amplifying circuit with transforming circuit, described linear drive circuit is by driving chip U1, triode VT5, triode VT6, triode VT7, triode VT8, positive pole is connected with transforming circuit, the polar capacitor C13 that negative pole is connected with the IN1 pin of driving chip U1 after resistance R12, one end is connected with the collector electrode of triode VT5, the resistance R13 that the other end is connected with the base stage of triode VT7 after resistance R14, positive pole is connected with the base stage of triode VT5, the polar capacitor C15 that negative pole is connected with the IN1 pin of driving chip U1, positive pole is connected with the IN2 pin of driving chip U1, the polar capacitor C14 of minus earth, one end is connected with the emitter of triode VT5, the resistance R16 that the other end is connected with the base stage of triode VT6, one end is connected with the base stage of triode VT6, the resistance R15 that the other end is connected with the base stage of triode VT7, N pole is connected with the collector electrode of triode VT5, the diode D6 that P pole is connected with the collector electrode of triode VT6, positive terminal is connected with the collector electrode of triode VT5, the not gate K that end of oppisite phase is connected with triode VT8 collector electrode, one end is connected with triode VT8 emitter, the resistance R18 that the other end is connected with the emitter of triode VT7 after resistance R17, the end of oppisite phase of P pole NAND gate K is connected, the diode D7 that N pole is connected with the tie point of resistance R18 with resistance R17 forms, the VCC pin of described driving chip U1 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with two-stage low-pass filtering amplifying circuit.
2. a kind of two-stage low-pass filtering based on Linear Driving according to claim 1 amplifies LED voltage-stabilizing system, it is characterized in that: described transforming circuit is by transformer T1, and the former limit circuit being arranged on the former limit of transformer T1 and the secondary circuit being arranged on transformer T1 secondary form; Described former limit circuit is by triode VT1, the resistance R1 that one end is connected with the base stage of triode VT1, the other end is connected with the non-same polarity of transformer T1 former limit inductance coil L2, the resistance C1 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the collector electrode of triode VT1, the diode D1 that P pole is connected with the positive pole of polar capacitor C1, N pole is then connected with the Same Name of Ends of transformer T1 former limit inductance coil L2, negative pole is connected with the Same Name of Ends of transformer T1 former limit inductance coil L1, positive pole forms as the polar capacitor C2 of system one input; The base stage of described triode VT1 is connected with the Same Name of Ends of inductance coil L3 as another input of system, collector electrode, grounded emitter, and the Same Name of Ends of inductance coil L2 is connected with the non-same polarity of inductance coil L1, its non-same polarity is then connected with the Same Name of Ends of inductance coil L3;
The polar capacitor C3 that described secondary circuit is then in parallel by the inductance coil L4 with transformer T1 secondary, the unidirectional thyristor D2 be all in parallel with polar capacitor C3 and resistance R2 forms; Unidirectional thyristor D2 is connected with two-stage low-pass filtering amplifying circuit with a common end of resistance R2, another common end is then connected with the positive pole of electric capacity C13.
3. a kind of two-stage low-pass filtering based on Linear Driving according to claim 2 amplifies LED voltage-stabilizing system, it is characterized in that: described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT2, triode VT3, positive pole is connected with the non-same polarity of transformer T1 secondary inductance coil L4, the polar capacitor C4 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R3 that the other end is connected with the positive pole of polar capacitor C4, positive pole is connected with amplifier P1 inverting input after resistance R4, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C4, be serially connected in the polar capacitor C6 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C7 that positive pole is connected with the base stage of triode VT2, one end is connected with the collector electrode of triode VT2, the resistance R5 that the other end is connected with the emitter of triode VT3, positive pole is connected with the base stage of triode VT3 after resistance R6, the polar capacitor C8 that negative pole is connected with the output of amplifier P1 and the N pole of diode D7 simultaneously, one end is connected with the positive pole of polar capacitor C8, the resistance R7 that the other end is connected with the inverting input of amplifier P2, the resistance R8 be in parallel with resistance R7, be serially connected in the polar capacitor C9 between the output of amplifier P2 and inverting input, and the resistance R9 be serially connected between the normal phase input end of amplifier P2 and output forms, the emitter of described triode VT2 is connected with the negative pole of electric capacity C8 and voltage stabilizing circuit simultaneously, and the collector electrode of triode VT3 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is connected with voltage stabilizing circuit.
4. a kind of two-stage low-pass filtering based on Linear Driving according to claim 3 amplifies LED voltage-stabilizing system, it is characterized in that: described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN pin of this three terminal regulator U, emitter is as system one output, the triode VT4 that collector electrode is then connected with the output of amplifier P2, diode D3 between the emitter and collector being serially connected in triode VT4, positive pole is connected with the collector electrode of triode VT4 after resistance R10, the polar capacitor C10 that negative pole is connected with the IN pin of three terminal regulator U after polar capacitor C11, N pole is connected with the positive pole of polar capacitor C10, the diode D4 that P pole is connected with the emitter of triode VT4, positive pole is connected with the OUT pin of three terminal regulator U, the polar capacitor C12 that negative pole is connected with the negative pole of polar capacitor C10 forms, the OUT pin of described three terminal regulator U is connected with the P pole of diode D4, GND pin ground connection, and the negative pole of electric capacity C10 is connected with the negative pole of electric capacity C8.
5. a kind of two-stage low-pass filtering based on Linear Driving according to claim 4 amplifies LED voltage-stabilizing system, it is characterized in that: described output circuit is made up of inductance L 5, thyristor D5 and resistance R11, described inductance L 5 one end is connected with the emitter of triode VT4, the other end is connected with the negative pole of polar capacitor C12, and thyristor D5 is in parallel with inductance L 5 after connecting with resistance R11 again.
6. appoint a kind of two-stage low-pass filtering based on Linear Driving described in work item to amplify LED voltage-stabilizing system according to Claims 1 to 5, it is characterized in that: described driving chip U1 is LM387 integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715177.XA CN104602399A (en) | 2014-11-29 | 2014-11-29 | Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system |
| CN201510323951.7A CN105142261A (en) | 2014-11-29 | 2015-06-14 | Two-pole low-pass filtering and amplifying LED voltage stabilizing system based on linear driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715177.XA CN104602399A (en) | 2014-11-29 | 2014-11-29 | Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system |
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| CN104602399A true CN104602399A (en) | 2015-05-06 |
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| CN201410715177.XA Pending CN104602399A (en) | 2014-11-29 | 2014-11-29 | Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system |
| CN201510323951.7A Withdrawn CN105142261A (en) | 2014-11-29 | 2015-06-14 | Two-pole low-pass filtering and amplifying LED voltage stabilizing system based on linear driving |
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| CN201510323951.7A Withdrawn CN105142261A (en) | 2014-11-29 | 2015-06-14 | Two-pole low-pass filtering and amplifying LED voltage stabilizing system based on linear driving |
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Application publication date: 20150506 |