CN105873294A - Efficient white light Led driving system - Google Patents
Efficient white light Led driving system Download PDFInfo
- Publication number
- CN105873294A CN105873294A CN201610380084.5A CN201610380084A CN105873294A CN 105873294 A CN105873294 A CN 105873294A CN 201610380084 A CN201610380084 A CN 201610380084A CN 105873294 A CN105873294 A CN 105873294A
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- Prior art keywords
- pole
- electric capacity
- diode
- circuit
- resistance
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Classifications
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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]
Abstract
The invention discloses an efficient white light LED driving system. The efficient white light LED driving system is characterized by being mainly composed of a transformer T, a power supply circuit, a micro processing circuit, an efficient voltage-lowering type drive circuit and a subsidiary side output circuit, wherein the micro processing circuit is in series connection between a primary side inductance coil L1 of the transformer T and the power supply circuit, the efficient voltage-lowering type drive circuit is in series connection between a primary side inductance coil L2 of the transformer T and the power supply circuit, and the subsidiary side output circuit is connected with a subsidiary side inductance coil L3 of the transformer T. The efficient voltage-lowering type drive circuit is high in driving efficiency and quite low in electric energy loss, and the electric energy loss is only 2/3 that of a traditional LED driving system. According to the efficient white light LED driving system, stable work voltage is provided for the efficient voltage-lowering type drive circuit through the micro processing circuit, and stability of the efficient white light LED driving system is improved.
Description
Technical field
The present invention relates to a kind of LED drive system, specifically refer to a kind of white light LEDs high efficiency drive 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.Owing to LED is different from traditional electric filament lamp, therefore
Its needs are driven by special drive circuit.But, current people are widely used LED drive circuit
Due to the irrationality of its design structure, result in current LED drive circuit, to there is drive efficiency low, energy consumption
More high defect.
Summary of the invention
It is an object of the invention to overcome traditional LED drive circuit to there is drive efficiency low, energy consumption is higher
Defect, it is provided that a kind of white light LEDs high efficiency drive system.
The purpose of the present invention is achieved through the following technical solutions: a kind of white light LEDs high efficiency drive system, mainly
By transformator T, power-supplying circuit, it is serially connected in the former limit inductance coil L1 of transformator T and power supply is powered electricity
Micro-processor interface circuit between road, is serially connected between former limit inductance coil L2 and the power-supplying circuit of transformator T
Efficient voltage-dropping type drive circuit, and be connected with the secondary inductance coil L3 of transformator T secondary output
Circuit forms.
Further, described power-supplying circuit is by diode rectifier U1, positive pole and diode rectifier
One input of U1 is connected, negative pole is then connected with another input of diode rectifier U1
Electric capacity C1, one end is connected with diode rectifier U1 input, the other end is then whole with diode
Another input of stream device U1 is collectively forming fuse FU, the N pole of the input of this power-supplying circuit
After electric capacity C2 the cathode output end with diode rectifier U1 be connected, P pole then with diode rectifier
The cathode output end of U1 be connected while the diode D1 of ground connection, and positive pole after diode D2 with two
The cathode output end of pole pipe commutator U1 is connected, negative pole then with the cathode output end of diode rectifier U1
The electric capacity C3 composition being connected；The positive pole of described electric capacity C3 is also connected with micro-processor interface circuit, its negative pole then
It is connected with efficient voltage-dropping type drive circuit；The negative pole of described diode rectifier U1 also with micro-processor interface circuit phase
Connect.
Described micro-processor interface circuit is connected with efficient voltage-dropping type drive circuit by N pole, P pole is then after resistance R1
The diode D3 being connected with the cathode output end of diode rectifier U1, and positive pole and diode rectification
The electric capacity C4 composition that the cathode output end of device U1 is connected, negative pole then positive pole with electric capacity C3 is connected；
The Same Name of Ends of the former limit inductance coil L1 of described transformator T is connected with the positive pole of electric capacity C4, it is non-of the same name
End then positive pole with electric capacity C3 is connected；The Same Name of Ends and two of the former limit inductance coil L2 of described transformator T
The N pole of pole pipe D3 is connected, its non-same polarity ground connection.
Described efficient voltage-dropping type drive circuit by driving chip U2, audion VT1, field effect transistor MOS,
Negative pole is connected with the GND pin of driving chip U2, positive pole sequentially after resistance R2 and resistance R3 with three
Electric capacity C6, the P pole that the base stage of pole pipe VT1 is connected is connected with the negative pole of electric capacity C3, N pole is then through electricity
The diode D4 being connected with the CTRL pin of driving chip U2 after holding C5, negative pole and field effect transistor MOS
The electric capacity C7 that source electrode is connected, positive pole is connected with the N pole of diode D3 after resistance R5, and
The resistance R4 composition being serially connected between the positive pole of electric capacity C7 and the colelctor electrode of audion VT1；Described audion
The emitter stage of VT1 is connected with the N pole of diode D3, its colelctor electrode then with the SET of driving chip U2
Pin is connected；The VIN pin of described driving chip U2 is connected with the junction point of resistance R2 and resistance R3
Connect, its GND pin ground connection, its SW pin are then connected with the grid of field effect transistor MOS；Described field
The grounded drain of effect pipe MOS.
Described secondary output circuit by Zener diode D5, positive pole after resistance R6 with the secondary of transformator T
The electric capacity that the non-same polarity of inductance coil L3 is connected, negative pole is then connected with the N pole of Zener diode D5
C8；Positive pole is connected with the N pole of Zener diode D5, negative pole then after resistance R7 with the pair of transformator T
The electric capacity C9 that the Same Name of Ends of limit inductance coil L3 is connected, and the resistance R8 group being in parallel with electric capacity C9
Become；The P pole of described Zener diode D5 is connected with the non-same polarity of the secondary inductance coil L3 of transformator T
Connect, its N pole then negative pole with electric capacity C9 is collectively forming the outfan of this secondary output circuit.
Described driving chip U2 is the integrated chip of AL8807A.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) drive efficiency of the efficient voltage-dropping type drive circuit of the present invention is high, and its electric energy loss is the lowest,
It is only the 2/3 of tradition LED drive system.
(2) present invention provides stable running voltage to efficient voltage-dropping type drive circuit by micro-processor interface circuit,
Improve the stability 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, 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 white light LEDs high efficiency drive system of the present invention, mainly by transformator T, power supply supplies
Electricity circuit, micro-processor interface circuit, efficient voltage-dropping type drive circuit and secondary output circuit five part composition.
As it is shown in figure 1, this micro-processor interface circuit is serially connected in the former limit inductance coil L1 of transformator T and power supply is powered
Between circuit.Efficiently voltage-dropping type drive circuit is then serially connected in former limit inductance coil L2 and the power supply confession of transformator T
Between electricity circuit.Secondary output circuit is connected with the secondary inductance coil L3 of transformator T.
Described power-supplying circuit is by diode rectifier U1, electric capacity C1, electric capacity C2, electric capacity C3, two poles
Pipe D1, diode D2 and fuse FU form.During connection, one end of fuse FU is whole with diode
One input of stream device U1 is connected, its other end then with another input of diode rectifier U1
It is collectively forming the input of this power-supplying circuit and connects 220V civil power, if civil power occurs due to instability
Overvoltage, this fuse FU is then blown, thus protects subsequent conditioning circuit not damaged by high voltage.Electric capacity C1
Positive pole is connected with an input of diode rectifier U1, its negative pole is then with diode rectifier U1's
Another input is connected.The N pole of diode D1 is connected with the negative pole of electric capacity C2, its P pole then with
The cathode output end of diode rectifier U1 be connected while ground connection.The positive pole of this electric capacity C2 then with two poles
The cathode output end of pipe commutator U1 is connected.
Meanwhile, the positive pole of this electric capacity C3 is connected with the P pole of diode D2, and its negative pole is then whole with diode
The cathode output end of stream device U1 is connected.The N pole of described diode D2 is then with diode rectifier U1's
Cathode output end is connected.This diode rectifier U1 is converted to unidirectional current electric main, and electric capacity C2
Then form the first filter circuit, diode D2 and electric capacity C3 with diode D1 and then form the second filter circuit,
Unidirectional current after the effect of two filter circuits can make conversion more smoothes out.For the direct current smooth-going
Electricity is supplied to subsequent conditioning circuit, the positive pole of described electric capacity C3 is also connected with micro-processor interface circuit, its negative pole then with height
Effect voltage-dropping type drive circuit is connected；The negative pole of described diode rectifier U1 is also connected with micro-processor interface circuit
Connect.
Described micro-processor interface circuit can provide stable with the electromagnetic interference occurred in filtration system for subsequent conditioning circuit
Working power, it is made up of diode D3, resistance R1 and electric capacity C4.Wherein, the N of diode D3
Pole is connected with efficient voltage-dropping type drive circuit, its P pole then after resistance R1 with diode rectifier U1's
Cathode output end is connected.The positive pole of electric capacity C4 is connected with the cathode output end of diode rectifier U1,
Its negative pole then positive pole with electric capacity C3 is connected.The Same Name of Ends of the former limit inductance coil L1 of described transformator T
Be connected with the positive pole of electric capacity C4, its non-same polarity then positive pole with electric capacity C3 is connected.Described transformator
The former Same Name of Ends of limit inductance coil L2 of T is connected with the N pole of diode D3, its non-same polarity ground connection.
Described efficient voltage-dropping type drive circuit by driving chip U2, audion VT1, field effect transistor MOS,
Resistance R2, resistance R3, resistance R4, resistance R5, diode D4, electric capacity C5, electric capacity C6 and electricity
Hold C7 composition.
During connection, the negative pole of electric capacity C6 is connected with the GND pin of driving chip U2, its positive pole sequentially
It is connected through resistance R2 base stage with audion VT1 after resistance R3.The P pole of diode D4 and electric capacity
The negative pole of C3 is connected, its N pole then positive pole with electric capacity C5 is connected.The negative pole of described electric capacity C5 with
The CTRL pin of driving chip U2 is connected.The source electrode phase of the negative pole of electric capacity C7 and field effect transistor MOS
Connect, its positive pole N pole with diode D3 after resistance R5 is connected.Resistance R4 is serially connected in electric capacity C7
Positive pole and the colelctor electrode of audion VT1 between.Electric capacity C7, resistance R5 and field effect transistor MOS shape
Becoming an on-off circuit, it is controlled by the SW pin of driving chip U2.
The emitter stage of described audion VT1 is connected with the N pole of diode D3, its colelctor electrode then with driving
The SET pin of chip U2 is connected.The VIN pin of described driving chip U2 and resistance R2 and resistance
The junction point of R3 is connected, its GND pin ground connection, its SW pin then with the grid of field effect transistor MOS
It is connected；The grounded drain of described field effect transistor MOS.In order to preferably implement the present invention, described driving core
The integrated chip of the preferred AL8807A of sheet U2 realizes.This transformator T carries out transformation to unidirectional current, to meet
The work requirements of LED.
Described secondary output circuit is by Zener diode D5, resistance R6, resistance R7, resistance R8, electric capacity
C8 and electric capacity C9 composition.Wherein, this electric capacity C9 and resistance R8 forms RC filter circuit, this electric capacity
The positive pole of C9 is connected with the N pole of Zener diode D5, its negative pole then after resistance R7 with transformator T
The Same Name of Ends of secondary inductance coil L3 be connected；Resistance R8 is in parallel with electric capacity C9.This RC filtered electrical
Road can filter out the interference signal that system self produces, and makes LED operation more stable.
The positive pole of this electric capacity C8 after resistance R6 with the non-same polarity of the secondary inductance coil L3 of transformator T
Be connected, its negative pole is then connected with the N pole of Zener diode D5.The P pole of described Zener diode D5
Be connected with the non-same polarity of the secondary inductance coil L3 of transformator T, its N pole then with the negative pole of electric capacity C9
It is collectively forming the outfan of this secondary output circuit, the output termination LED of this secondary output circuit.
As it has been described above, just can well realize the present invention.
Claims (6)
1. a white light LEDs high efficiency drive system, it is characterised in that main by transformator T, power supply is powered
Circuit, is serially connected in the micro-processor interface circuit between former limit inductance coil L1 and the power-supplying circuit of transformator T,
The efficient voltage-dropping type being serially connected between former limit inductance coil L2 and the power-supplying circuit of transformator T drives electricity
Road, and the secondary output circuit composition being connected with the secondary inductance coil L3 of transformator T.
A kind of white light LEDs high efficiency drive system the most according to claim 1, it is characterised in that: institute
State power-supplying circuit by diode rectifier U1, an input phase of positive pole and diode rectifier U1
The electric capacity C1 that connection, negative pole are then connected with another input of diode rectifier U1, one end and two
One input of pole pipe commutator U1 is connected, the other end is then defeated with another of diode rectifier U1
Enter end be collectively forming fuse FU, the N pole of input of this power-supplying circuit after electric capacity C2 with two poles
The cathode output end of pipe commutator U1 is connected, P pole then with the cathode output end phase of diode rectifier U1
The diode D1 of ground connection while connection, and positive pole negative with diode rectifier U1 after diode D2
The electric capacity C3 group that pole outfan is connected, negative pole then cathode output end with diode rectifier U1 is connected
Become；The positive pole of described electric capacity C3 is also connected with micro-processor interface circuit, its negative pole then drives electricity with efficient voltage-dropping type
Road is connected；The negative pole of described diode rectifier U1 is also connected with micro-processor interface circuit.
A kind of white light LEDs high efficiency drive system the most according to claim 2, it is characterised in that: institute
State micro-processor interface circuit be connected with efficient voltage-dropping type drive circuit by N pole, P pole then after resistance R1 with two poles
The diode D3 that the cathode output end of pipe commutator U1 is connected, and positive pole and diode rectifier U1
The electric capacity C4 composition that cathode output end is connected, negative pole then positive pole with electric capacity C3 is connected；Described change
The former Same Name of Ends of limit inductance coil L1 of depressor T is connected with the positive pole of electric capacity C4, its non-same polarity then with
The positive pole of electric capacity C3 is connected；The Same Name of Ends of the former limit inductance coil L2 of described transformator T and diode D3
N pole be connected, its non-same polarity ground connection.
A kind of white light LEDs high efficiency drive system the most according to claim 3, it is characterised in that: institute
State efficient voltage-dropping type drive circuit by driving chip U2, audion VT1, field effect transistor MOS, negative pole with
The GND pin of driving chip U2 is connected, positive pole sequentially after resistance R2 and resistance R3 with audion
Electric capacity C6, the P pole that the base stage of VT1 is connected is connected with the negative pole of electric capacity C3, N pole is then through electric capacity C5
The source of the diode D4 being connected with the CTRL pin of driving chip U2 afterwards, negative pole and field effect transistor MOS
The electric capacity C7 that pole is connected, positive pole is connected with the N pole of diode D3 after resistance R5, and concatenation
Resistance R4 composition between the positive pole and the colelctor electrode of audion VT1 of electric capacity C7；Described audion VT1
Emitter stage be connected with the N pole of diode D3, its colelctor electrode then with the SET pin of driving chip U2
It is connected；The VIN pin of described driving chip U2 is connected with the junction point of resistance R2 and resistance R3,
Its GND pin ground connection, its SW pin are then connected with the grid of field effect transistor MOS；Described field effect
The grounded drain of pipe MOS.
A kind of white light LEDs high efficiency drive system the most according to claim 4, it is characterised in that: institute
State secondary output circuit by Zener diode D5, positive pole after resistance R6 with the secondary inductance line of transformator T
The electric capacity C8 that non-same polarity is connected, negative pole is then connected with the N pole of Zener diode D5 of circle L3；
Positive pole is connected with the N pole of Zener diode D5, negative pole then after resistance R7 with the secondary of transformator T electricity
The electric capacity C9 that the Same Name of Ends of sense coil L3 is connected, and the resistance R8 composition being in parallel with electric capacity C9；
The P pole of described Zener diode D5 is connected with the non-same polarity of the secondary inductance coil L3 of transformator T,
Its N pole then negative pole with electric capacity C9 is collectively forming the outfan of this secondary output circuit.
A kind of white light LEDs high efficiency drive system the most according to claim 5, it is characterised in that: institute
Stating driving chip U2 is the integrated chip of AL8807A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380084.5A CN105873294A (en) | 2016-05-30 | 2016-05-30 | Efficient white light Led driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380084.5A CN105873294A (en) | 2016-05-30 | 2016-05-30 | Efficient white light Led driving system |
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| Publication Number | Publication Date |
|---|---|
| CN105873294A true CN105873294A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610380084.5A Pending CN105873294A (en) | 2016-05-30 | 2016-05-30 | Efficient white light Led driving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538406A (en) * | 2015-12-14 | 2016-05-04 | 芜湖恒信汽车内饰制造有限公司 | Cutting method for plastic part cutting system |
-
2016
- 2016-05-30 CN CN201610380084.5A patent/CN105873294A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538406A (en) * | 2015-12-14 | 2016-05-04 | 芜湖恒信汽车内饰制造有限公司 | Cutting method for plastic part cutting system |
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Application publication date: 20160817 |