CN106162994A - A kind of adjustable voltage stabilizing of LED drives power supply - Google Patents
A kind of adjustable voltage stabilizing of LED drives power supply Download PDFInfo
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- CN106162994A CN106162994A CN201610566380.4A CN201610566380A CN106162994A CN 106162994 A CN106162994 A CN 106162994A CN 201610566380 A CN201610566380 A CN 201610566380A CN 106162994 A CN106162994 A CN 106162994A
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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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Abstract
The invention discloses a kind of adjustable voltage stabilizing of LED and drive power supply, it is characterized in that, main by transformator T, diode rectifier U1, diode rectifier U2, unidirectional thyristor VS, Zener diode D1, polar capacitor C5, the base stage being connected with the N pole of Zener diode D1 and the cathode output end of diode rectifier U1 respectively triggers circuit, and the three-terminal voltage-stabilizing circuit composition being connected respectively with the negative electrode of unidirectional thyristor VS and the cathode output end of diode rectifier U2.The voltage stabilizing chip U3 of the present invention have employed the integrated chip of LM317 and realizes, and this chip combines with peripheral circuit and achieves suspension power supply；And the present invention can realize pre-pressure regulation by IGCT, can export the adjustable voltage of 6～12V, ensure that the present invention can export large-scale adjustable voltage.
Description
Technical field
The present invention relates to electronic applications, specifically, be that a kind of adjustable voltage stabilizing of LED drives power supply.
Background technology
Under the background that global energy shortage, environmental requirement improve constantly, countries in the world are all greatly developed green energy conservation and are shone
Bright.LED illumination, as a kind of revolutionary energy-saving illumination technology, develops rapidly, and wherein the brightness of Dimmable LED can be because of it
Can be adjusted according to ambient brightness and be widely used by people.But, there is the adjustable model of output voltage in existing LED regulated power supply
Enclosing little problem, the change causing dimming LED lamp brightness is little, thus cannot meet the requirement of people.
Therefore it provides the LED regulated power supply that a kind of output voltage can regulate on a large scale is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED regulated power supply of the prior art to there is little the lacking of output voltage adjustable extent
Fall into, it is provided that the adjustable voltage stabilizing of a kind of LED drive power supply.
The present invention is achieved through the following technical solutions: a kind of adjustable voltage stabilizing of LED drives power supply, mainly by transformator T, two
Pole pipe commutator U1, diode rectifier U2, unidirectional thyristor VS, N pole after resistance R1 with the positive pole of diode rectifier U1
The Zener diode D1 that outfan is connected, P pole cathode output end with diode rectifier U1 after resistance R2 is connected, just
Pole is connected with the cathode output end of diode rectifier U2, negative pole is connected with the cathode output end of diode rectifier U2
Polar capacitor C5, the base stage being connected with the N pole of Zener diode D1 and the cathode output end of diode rectifier U1 respectively is touched
Power Generation Road, and three ends being connected with the cathode output end of the negative electrode of unidirectional thyristor VS and diode rectifier U2 respectively are steady
Volt circuit forms；The Same Name of Ends of described transformator T secondary inductance coil L2 and one of them input of diode rectifier U1
Be connected, its non-same polarity is connected with another input of diode rectifier U1；Described transformator T secondary inductance coil
The Same Name of Ends of L3 is connected with one of them input of diode rectifier U2, its non-same polarity and diode rectifier U2
Another input is connected；The anode of described unidirectional thyristor VS is connected with the cathode output end of diode rectifier U2,
It controls end and is connected with base stage triggering circuit；The Same Name of Ends of described transformator T former limit inductance coil L1 and non-same polarity conduct
This adjustable voltage stabilizing drives the input of power supply；Described base stage triggers circuit and is connected with three-terminal voltage-stabilizing circuit.
Described base stage triggers circuit by field effect transistor MOS, audion VT1, audion VT2, positive pole and field effect transistor MOS
The polar capacitor C2 that source electrode is connected, negative pole is connected with the control end of unidirectional thyristor VS, negative pole and the transmitting of audion VT1
The polar capacitor C3 that pole is connected, positive pole is connected with the grid of field effect transistor MOS after resistance R4, negative pole after resistance R5 with
Polar capacitor C1, the N pole that the colelctor electrode of audion VT1 is connected, positive pole is connected with the drain electrode of field effect transistor MOS is through resistance R8
The diode D2, N that base stage with audion VT2 is connected afterwards, P pole is connected with the drain electrode of field effect transistor MOS after resistance R3
The diode D3 that pole is connected with the base stage of audion VT2, P pole emitter stage with audion VT1 after resistance R7 is connected, with
And negative pole is connected with the emitter stage of audion VT2, positive pole positive pole with polar capacitor C3 after resistance R6 the is connected pole connect
Property electric capacity C4 composition；The drain electrode of described field effect transistor MOS is connected with the N pole of Zener diode D1；Described polar capacitor C1's
Negative pole is connected with the positive pole of polar capacitor C3；The positive pole of described polar capacitor C3 and the cathode output end of diode rectifier U1
It is connected；The colelctor electrode of described audion VT2 is connected with the base stage of audion VT1, the positive pole of its base stage and polar capacitor C3
Collectively constitute base stage trigger the outfan of circuit and be connected with three-terminal voltage-stabilizing circuit.
Described three-terminal voltage-stabilizing circuit is by the IN of voltage stabilizing chip U3, audion VT3, audion VT4, one end and voltage stabilizing chip U3
Resistance R9, the N pole that pin is connected, the other end is connected with the emitter stage of audion VT3 after resistance R13 with audion VT4
The diode D4 that base stage is connected, P pole base stage with audion VT3 after resistance R11 is connected, negative pole is through adjustable resistance
The polar capacitor that after R12, the P pole with diode D4 is connected, positive pole colelctor electrode with audion VT3 after resistance R10 is connected
C6, the pole that positive pole is connected with the colelctor electrode of audion VT4, negative pole negative pole with polar capacitor C6 after resistance R14 is connected
Property electric capacity C7, N pole is connected with the negative pole of polar capacitor C6, P pole OUT pin with voltage stabilizing chip U3 after resistance R15 is connected
The Zener diode D5 connect, and positive pole is connected with the OUT pin of voltage stabilizing chip U3, the emitter stage of negative pole and audion VT4
The polar capacitor C8 composition being connected；The IN pin of described voltage stabilizing chip U3 is electric with the negative electrode of unidirectional thyristor VS and polarity respectively
The positive pole holding C3 is connected, its GND pin is connected with the P pole of diode D4, the N pole of its OUT pin and Zener diode D5
It is collectively forming the outfan of three-terminal voltage-stabilizing circuit；The described OUT pin of voltage stabilizing chip U3 is connected with the base stage of audion VT2；
The positive pole of described polar capacitor C6 is connected with the cathode output end of diode rectifier U2.
For the practical effect of the present invention, described voltage stabilizing chip U3 the most preferentially uses the integrated chip of LM317 to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the voltage stabilizing chip U3 of the present invention have employed the integrated chip of LM317 and realizes, and this chip combines with peripheral circuit
Achieve suspension power supply；And the present invention can realize pre-pressure regulation by IGCT, the adjustable voltage of 6～12V can be exported, thus really
Protect the present invention and can export large-scale adjustable voltage.
(2) present invention only needs the starting current of 0.5 μ A, i.e. reduces the power consumption of startup, thus improves the effect of the present invention
Rate.
(3) the output current error < 2%, thus improve voltage regulation accuracy of the present invention of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram 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 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 transformator T, diode rectifier U1, diode rectifier U2, unidirectional brilliant lock
Pipe VS, N pole is connected with the cathode output end of diode rectifier U1 after resistance R1, P pole is whole with diode after resistance R2
The Zener diode D1 that the cathode output end of stream device U1 is connected, positive pole is connected with the cathode output end of diode rectifier U2
Connect, polar capacitor C5 that negative pole is connected with the cathode output end of diode rectifier U2, respectively with the N pole of Zener diode D1
The base stage that is connected with the cathode output end of diode rectifier U1 triggers circuit, and respectively with the negative electrode of unidirectional thyristor VS
The three-terminal voltage-stabilizing circuit composition being connected with the cathode output end of diode rectifier U2.
The Same Name of Ends of described transformator T secondary inductance coil L2 is connected with one of them input of diode rectifier U1
Connect, its non-same polarity is connected with another input of diode rectifier U1；Described transformator T secondary inductance coil L3's
Same Name of Ends is connected with one of them input of diode rectifier U2, its non-same polarity and diode rectifier U2 another
Individual input is connected；The anode of described unidirectional thyristor VS is connected with the cathode output end of diode rectifier U2, its control
End processed triggers circuit with base stage and is connected；Described base stage triggers circuit and is connected with three-terminal voltage-stabilizing circuit；The described former limit of transformator T
The Same Name of Ends of inductance coil L1 and is connected with external power source as the input of this adjustable voltage stabilizing driving power supply with non-same polarity.
Wherein, described base stage triggers circuit by field effect transistor MOS, audion VT1, audion VT2, resistance R3, resistance R4,
Resistance R5, resistance R6, resistance R7, resistance R8, polar capacitor C1, polar capacitor C2, polar capacitor C3, polar capacitor C4, two poles
Pipe D2, and diode D3 composition.
During connection, the positive pole of polar capacitor C2 is connected with the source electrode of field effect transistor MOS, its negative pole and unidirectional thyristor VS
Control end be connected.The negative pole of polar capacitor C3 is connected with the emitter stage of audion VT1, its positive pole after resistance R4 with field
The grid of effect pipe MOS is connected.The negative pole of polar capacitor C1 colelctor electrode with audion VT1 after resistance R5 is connected, it
Positive pole is connected with the drain electrode of field effect transistor MOS.
Meanwhile, the N pole of diode D2 base stage with audion VT2 after resistance R8 be connected, its P pole after resistance R3 with
The drain electrode of field effect transistor MOS is connected.The N pole of diode D3 is connected with the base stage of audion VT2, its P pole is after resistance R7
It is connected with the emitter stage of audion VT1.The negative pole of polar capacitor C4 is connected with the emitter stage of audion VT2, its positive pole warp
After resistance R6, positive pole with polar capacitor C3 is connected and connects.
The drain electrode of described field effect transistor MOS is connected with the N pole of Zener diode D1；The negative pole of described polar capacitor C1 with
The positive pole of polar capacitor C3 is connected；The positive pole of described polar capacitor C3 is connected with the cathode output end of diode rectifier U1
Connect；The colelctor electrode of described audion VT2 is connected with the base stage of audion VT1, its base stage is common with the positive pole of polar capacitor C3
Composition base stage triggers the outfan of circuit and is connected with three-terminal voltage-stabilizing circuit.
Further, described three-terminal voltage-stabilizing circuit is by voltage stabilizing chip U3, audion VT3, audion VT4, resistance R9, resistance
R10, resistance R11, adjustable resistance R12, resistance R13, resistance R14, resistance R15, polar capacitor C6, polar capacitor C7, polarity electricity
Hold C8, diode D4, and Zener diode D5 composition.
During connection, one end of resistance R9 is connected with the IN pin of voltage stabilizing chip U3, its other end is sent out with audion VT3's
Emitter-base bandgap grading is connected.The N pole of diode D4 base stage with audion VT4 after resistance R13 is connected, its P pole after resistance R11 with
The base stage of audion VT3 is connected.The negative pole of polar capacitor C6 P pole with diode D4 after adjustable resistance R12 is connected, it
Positive pole colelctor electrode with audion VT3 after resistance R10 is connected.
Meanwhile, the positive pole of polar capacitor C7 be connected with the colelctor electrode of audion VT4, its negative pole after resistance R14 with pole
The negative pole of property electric capacity C6 is connected.The N pole of Zener diode D5 is connected with the negative pole of polar capacitor C6, its P pole is through resistance R15
OUT pin with voltage stabilizing chip U3 is connected afterwards.The positive pole of polar capacitor C8 is connected with the OUT pin of voltage stabilizing chip U3, it
Negative pole is connected with the emitter stage of audion VT4.
The IN pin of described voltage stabilizing chip U3 is connected with the negative electrode of unidirectional thyristor VS and the positive pole of polar capacitor C3 respectively
Connect, that its GND pin is connected with the P pole of diode D4, its OUT pin and the N pole of Zener diode D5 are collectively forming three ends is steady
The outfan of volt circuit；The described OUT pin of voltage stabilizing chip U3 is connected with the base stage of audion VT2；Described polar capacitor C6
Positive pole be connected with the cathode output end of diode rectifier U2.
During enforcement, the voltage stabilizing chip U3 of the present invention have employed the integrated chip of LM317 and realizes, this chip and peripheral circuit phase
It is implemented in combination with the power supply that suspends；And the present invention can realize pre-pressure regulation by IGCT, can export the adjustable voltage of 6～12V, from
And ensure that the present invention can export large-scale adjustable voltage.
Meanwhile, the present invention only needs the starting current of 0.5 μ A, i.e. reduces the power consumption of startup, thus improves the present invention's
Efficiency.The output current error of the present invention < 2%, thus improve voltage regulation accuracy of the present invention.
According to above-described embodiment, can well realize the present invention.
Claims (4)
1. the adjustable voltage stabilizing of LED drives power supply, it is characterised in that main by transformator T, diode rectifier U1, diode
Commutator U2, unidirectional thyristor VS, N pole cathode output end with diode rectifier U1 after resistance R1 is connected, P pole is through electricity
The Zener diode D1 being connected with the cathode output end of diode rectifier U1 after resistance R2, positive pole is with diode rectifier U2's
The polar capacitor C5 that cathode output end is connected, negative pole is connected with the cathode output end of diode rectifier U2, respectively with surely
The base stage that is connected with the cathode output end of diode rectifier U1 of N pole of pressure diode D1 triggers circuit, and respectively with list
The three-terminal voltage-stabilizing circuit composition being connected with the cathode output end of diode rectifier U2 to the negative electrode of IGCT VS；Described transformation
The Same Name of Ends of device T secondary inductance coil L2 is connected with one of them input of diode rectifier U1, its non-same polarity with
Another input of diode rectifier U1 is connected；The Same Name of Ends of described transformator T secondary inductance coil L3 and diode
One of them input of commutator U2 is connected, its non-same polarity is connected with another input of diode rectifier U2
Connect；The anode of described unidirectional thyristor VS is connected with the cathode output end of diode rectifier U2, it controls end and touches with base stage
Power Generation Road is connected；Same Name of Ends and the non-same polarity of described transformator T former limit inductance coil L1 drive electricity as this adjustable voltage stabilizing
The input in source；Described base stage triggers circuit and is connected with three-terminal voltage-stabilizing circuit.
A kind of adjustable voltage stabilizing of LED the most according to claim 1 drives power supply, it is characterised in that described base stage triggers circuit
By field effect transistor MOS, audion VT1, audion VT2, positive pole is connected with the source electrode of field effect transistor MOS, negative pole and unidirectional crystalline substance
Brake tube VS controls the polar capacitor C2 that is connected of end, and negative pole is connected with the emitter stage of audion VT1, positive pole is after resistance R4
The polar capacitor C3 being connected with the grid of field effect transistor MOS, negative pole colelctor electrode with audion VT1 after resistance R5 is connected
Connect, polar capacitor C1, N pole that positive pole is connected with the drain electrode of field effect transistor MOS after resistance R8 with the base stage phase of audion VT2
Connect, the base stage phase of diode D2, the N pole that is connected with the drain electrode of field effect transistor MOS after resistance R3, P pole and audion VT2
Connect, diode D3 that P pole emitter stage with audion VT1 after resistance R7 is connected, and the sending out of negative pole and audion VT2
The polar capacitor C4 composition that emitter-base bandgap grading is connected, positive pole positive pole with polar capacitor C3 after resistance R6 is connected to be connect；Described field is imitated
Should the drain electrode of pipe MOS be connected with the N pole of Zener diode D1；The negative pole of described polar capacitor C1 and the positive pole of polar capacitor C3
It is connected；The positive pole of described polar capacitor C3 is connected with the cathode output end of diode rectifier U1；Described audion VT2's
Colelctor electrode is connected with the base stage of audion VT1, its base stage collectively constitutes base stage triggering circuit with the positive pole of polar capacitor C3
Outfan is also connected with three-terminal voltage-stabilizing circuit.
A kind of adjustable voltage stabilizing of LED the most according to claim 2 drives power supply, it is characterised in that described three-terminal voltage-stabilizing circuit
By voltage stabilizing chip U3, audion VT3, audion VT4, one end is connected with the IN pin of voltage stabilizing chip U3, the other end and three poles
Resistance R9, the N pole that the emitter stage of pipe VT3 is connected base stage with audion VT4 after resistance R13 is connected, P pole is through resistance
The diode D4 that after R11, base stage with audion VT3 is connected, negative pole P with diode D4 after adjustable resistance R12 are extremely connected
Connect, polar capacitor C6 that positive pole colelctor electrode with audion VT3 after resistance R10 is connected, the current collection of positive pole and audion VT4
Pole is connected, negative pole negative pole with polar capacitor C6 after resistance R14 is connected polar capacitor C7, N pole and polar capacitor C6
The Zener diode D5 that negative pole is connected, P pole OUT pin with voltage stabilizing chip U3 after resistance R15 is connected, and positive pole
Be connected with the OUT pin of voltage stabilizing chip U3, polar capacitor C8 that negative pole is connected with the emitter stage of audion VT4 composition；Institute
State the IN pin of voltage stabilizing chip U3 respectively with the negative electrode of unidirectional thyristor VS and the positive pole of polar capacitor C3 is connected, its GND pipe
Foot is connected with the P pole of diode D4, its OUT pin is collectively forming the defeated of three-terminal voltage-stabilizing circuit with the N pole of Zener diode D5
Go out end；The described OUT pin of voltage stabilizing chip U3 is connected with the base stage of audion VT2；The positive pole and two of described polar capacitor C6
The cathode output end of pole pipe commutator U2 is connected.
A kind of adjustable voltage stabilizing of LED the most according to claim 3 drives power supply, it is characterised in that described voltage stabilizing chip U3 is
The integrated chip of LM317.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566380.4A CN106162994A (en) | 2016-07-18 | 2016-07-18 | A kind of adjustable voltage stabilizing of LED drives power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566380.4A CN106162994A (en) | 2016-07-18 | 2016-07-18 | A kind of adjustable voltage stabilizing of LED drives power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106162994A true CN106162994A (en) | 2016-11-23 |
Family
ID=58059907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610566380.4A Pending CN106162994A (en) | 2016-07-18 | 2016-07-18 | A kind of adjustable voltage stabilizing of LED drives power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106162994A (en) |
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2016
- 2016-07-18 CN CN201610566380.4A patent/CN106162994A/en active Pending
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |
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| WD01 | Invention patent application deemed withdrawn after publication |