CN105916247A - Reference current correction type energy-saving power supply circuit used for cold light LED - Google Patents
Reference current correction type energy-saving power supply circuit used for cold light LED Download PDFInfo
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- CN105916247A CN105916247A CN201610380140.5A CN201610380140A CN105916247A CN 105916247 A CN105916247 A CN 105916247A CN 201610380140 A CN201610380140 A CN 201610380140A CN 105916247 A CN105916247 A CN 105916247A
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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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- 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 reference current correction type energy-saving power supply circuit used for a cold light LED. The circuit is characterized in that the circuit is mainly composed of a control chip U2, a reference current correction circuit, a thyristor trigger circuit, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, a resistor R9 one end of which is connected with a positive electrode of the polar capacitor C5 and the other end is connected with a GND pin of the control chip U2 and then is grounded, a polar capacitor C9 serially connected between a non-dotted end and a dotted end of a secondary side inductance coil of the transformer T, and a low pass filter circuit serially connected between the diode rectifier U1 and the transformer T. According to the invention, the voltage and current on an input end can be filtered, so that the input voltage and current are more stable; in addition, the strength of the filtered voltage and current is adjusted, and the movement of the electromagnetic waves of the current is maintained in a uniform speed state, so that a stable work current can be output, and the brightness stability of an LED and the like is ensured.
Description
Technical field
The present invention relates to electric energy-saving field, specifically, be that a kind of reference current corrector cold light LED is used
Energy-saving electric power circuit.
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 power circuit.But, the power circuit that current LED is used is not
Only being easily subject to the impact of external voltage fluctuations, and its load capacity is poor, output electric current is unstable, from
And cause the brightness instability of LED, power consumption, service life short.
Therefore it provides one can improve load capacity, can ensure that again outputting current steadily, can also drop simultaneously
The LED power circuit of low energy consumption is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED voltage circuit of the prior art to there is load capacity poor, defeated
Go out the defect that electric current is unstable, it is provided that a kind of reference current corrector cold light LED energy-saving electric power circuit.
The present invention is achieved through the following technical solutions: a kind of reference current corrector cold light LED is with energy-conservation
Power circuit, mainly by control chip U2, transformator T, diode rectifier U1, negative pole is whole with diode
The cathode output end of stream device U1 is connected, positive pole is connected with the cathode output end of diode rectifier U1
Polar capacitor C1, negative pole is connected with the CS pin of control chip U2, positive pole after inductance L with control
The polar capacitor C5 that the RE pin of chip U2 is connected, one end is connected with the positive pole of polar capacitor C5,
The other end be connected with the GND pin of control chip U2 after the resistance R9 of ground connection, be serially connected in transformator T
Polar capacitor C9 between non-same polarity and the Same Name of Ends of secondary inductance coil, is serially connected in control chip U2's
Reference current correcting circuit between VCC pin and VS-pin, is serially connected in control chip U2 and reference current
Thyristor gating circuit between correcting circuit, and be serially connected between diode rectifier U1 and transformator T
Low-pass filter circuit composition；Described reference current correcting circuit touches with low-pass filter circuit and IGCT respectively
Power Generation Road is connected.
Described low-pass filter circuit is by the cathode output end of audion VT1, P pole Yu diode rectifier U1
Be connected, diode D1 that N pole base stage with audion VT1 after adjustable resistance R2 is connected, positive pole
Be connected with the P pole of diode D1, polar capacitor C2 that negative pole is connected with the base stage of audion VT1,
Ground connection after P pole is connected with the positive pole of polar capacitor C2, N pole is connected with the colelctor electrode of audion VT1
Diode D3, one end is connected with the N pole of diode D1, the emitter stage phase of the other end and audion VT1
The resistance R3 connected, and positive pole N pole with diode D1 after resistance R4 is connected, negative pole is through electricity
The polar capacitor C3 composition being connected with the colelctor electrode of audion VT1 after resistance R5；Described audion VT1
Base stage be connected with reference current correcting circuit, its colelctor electrode is connected with thyristor gating circuit.
Described reference current correcting circuit by audion VT2, N pole after resistance R7 with control chip U's
The diode D2 that VCC pin is connected, P pole emitter stage with audion VT2 after resistance R8 is connected,
Positive pole is connected with the colelctor electrode of audion VT2, polar capacitor C4, the P pole of minus earth is through resistance R10
The diode that base stage with audion VT2 is connected afterwards, N pole is connected with the VS pin of control chip U2
D4, and positive pole be sequentially connected through resistance R12 negative pole with polar capacitor C4 after resistance R11, negative
Pole is as the outfan of reference current correcting circuit the polar capacitor C6 group that is connected with thyristor gating circuit
Become；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；The N of described diode D2
Pole is connected with the base stage of audion VT1.
Described thyristor gating circuit is by field effect transistor MOS1, field effect transistor MOS2, one end and control core
The resistance R13 that the LO pin of sheet U2 is connected, the other end is connected with the grid of field effect transistor MOS2,
Negative pole grid with field effect transistor MOS2 after resistance R15 is connected, the transmitting of positive pole and audion VT1
The polar capacitor C8 that pole is connected, negative pole is connected with the grid of field effect transistor MOS1, positive pole is through resistance
The polar capacitor C7 being connected with the HC pin of control chip U2 after R6, one end and field effect transistor MOS1
The resistance R14 that source electrode is connected, the other end is connected with the VS+ pin of control chip U2, and P pole
Be connected with the source electrode of field effect transistor MOS2, the non-same polarity of the former limit inductance coil of N pole and transformator T
The diode D5 composition being connected；The grounded drain of described field effect transistor MOS2, its grid and polar capacitor
The negative pole of C6 is connected, and its source electrode is connected with the source electrode of field effect transistor MOS1；Described field effect transistor MOS1
The drain electrode Same Name of Ends of limit former with transformator T inductance coil respectively and the emitter stage of audion VT1 be connected.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated core of L6569
Sheet realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) input terminal voltage electric current can be filtered processing by the present invention, and the voltage x current making input is more steady,
The intensity of the voltage x current after Filtering Processing the most of the present invention is adjusted, and makes the motion of the electromagnetic wave of electric current protect
Hold at the uniform velocity state, thus enable the invention to export stable operating current, it is ensured that stablizing of LED brightness
Property.
(2) present invention employs the integrated chip of high-precision L6569, it is strong, overheated that this chip has stability
The functions such as protection, overcurrent protection, effectively raise the stability of the output electric current of the present invention.
(3) service life that can effectively extend LED of the present invention, the electricity of more than 50% can be saved simultaneously,
Thus meet people to LED control system in the demand of energy-conservation aspect.
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 the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, transformator T, diode rectifier U1,
Polar capacitor C1, polar capacitor C5, polar capacitor C9, inductance L, thyristor gating circuit, benchmark electricity
Stream correcting circuit, and low-pass filter circuit composition.
During enforcement, the negative pole of polar capacitor C1 is connected with the cathode output end of diode rectifier U1, it
Positive pole is connected with the cathode output end of diode rectifier U1.The negative pole of polar capacitor C5 and control chip
The CS pin of U2 is connected, its positive pole RE pin with control chip U2 after inductance L is connected.Electricity
One end of resistance R9 is connected with the positive pole of polar capacitor C5, the GND pin of the other end and control chip U2
Ground connection after being connected.Polar capacitor C9 is serially connected in non-same polarity and the Same Name of Ends of transformator T secondary inductance coil
Between.Reference current correcting circuit is serially connected between the VCC pin of control chip U2 and VS-pin.Brilliant
Brake tube triggers circuit and is serially connected between control chip U2 and reference current correcting circuit.Low-pass filter circuit concatenates
Between diode rectifier U1 and transformator T.
Described reference current correcting circuit is connected with low-pass filter circuit and thyristor gating circuit respectively.Institute
The Same Name of Ends of the secondary inductance coil stating transformator T is connected with LED group respectively with non-same polarity.Described
The input of diode rectifier U1 is connected with power supply.
Wherein, described low-pass filter circuit by audion VT1, resistance R1, adjustable resistance R2, resistance R3,
Resistance R4, resistance R5, polar capacitor C3, diode D1, and diode D3 form.
During connection, the P pole of diode D1 is connected with the cathode output end of diode rectifier U1, its N
Pole base stage with audion VT1 after adjustable resistance R2 is connected.The positive pole of polar capacitor C2 and diode
The P pole of D1 is connected, its negative pole is connected with the base stage of audion VT1.The P pole of diode D3 and pole
Ground connection after the positive pole of property electric capacity C2 is connected, its N pole is connected with the colelctor electrode of audion VT1.
Meanwhile, one end of resistance R3 be connected with the N pole of diode D1, its other end and audion VT1
Emitter stage be connected.The positive pole of polar capacitor C3 N pole with diode D1 after resistance R4 is connected,
Its negative pole colelctor electrode with audion VT1 after resistance R5 is connected.The base stage of described audion VT1 with
Reference current correcting circuit is connected, and its colelctor electrode is connected with thyristor gating circuit.
Further, described reference current correcting circuit is by audion VT2, resistance R7, resistance R8, electricity
Resistance R10, resistance R11, resistance R12, polar capacitor C4, polar capacitor C6, diode D2, and
Diode D4 forms.
During connection, the N pole of diode D2 VCC pin with control chip U after resistance R7 is connected,
Its P pole emitter stage with audion VT2 after resistance R8 is connected.The positive pole of polar capacitor C4 and three poles
The colelctor electrode of pipe VT2 is connected, its minus earth.The P pole of diode D4 after resistance R10 with three poles
The base stage of pipe VT2 is connected, its N pole is connected with the VS pin of control chip U2.Polar capacitor C6
Positive pole be sequentially connected through resistance R12 negative pole with polar capacitor C4 after resistance R11, its negative pole is made
On the basis of the outfan of current correction circuit being connected with thyristor gating circuit.The N of described diode D4
Pole is connected with the positive pole of polar capacitor C6；The N pole of described diode D2 and the base stage of audion VT1
It is connected.
Further, described thyristor gating circuit by field effect transistor MOS1, field effect transistor MOS2,
Resistance R6, resistance R13, resistance R14, resistance R15, polar capacitor C8, and Zener diode D5
Composition.
During connection, one end of resistance R13 is connected with the LO pin of control chip U2, its other end with
The grid of field effect transistor MOS2 is connected.The negative pole of polar capacitor C8 after resistance R15 with field effect transistor
The grid of MOS2 is connected, its positive pole is connected with the emitter stage of audion VT1.Polar capacitor C7's is negative
Pole is connected with the grid of field effect transistor MOS1, its positive pole after resistance R6 with the HC of control chip U2
Pin is connected.One end of resistance R14 is connected with the source electrode of field effect transistor MOS1, its other end and control
The VS+ pin of coremaking sheet U2 is connected.The P pole of diode D5 is connected with the source electrode of field effect transistor MOS2
Connect, its N pole is connected with the non-same polarity of the former limit inductance coil of transformator T.
The grounded drain of described field effect transistor MOS2, its grid is connected with the negative pole of polar capacitor C6,
Its source electrode is connected with the source electrode of field effect transistor MOS1；The drain electrode of described field effect transistor MOS1 respectively with change
The Same Name of Ends of depressor T former limit inductance coil is connected with the emitter stage of audion VT1.
During operation, input terminal voltage electric current can be filtered processing by the present invention, and the voltage x current making input is more flat
Surely, the intensity of the voltage x current after Filtering Processing the most of the present invention is adjusted, and makes the fortune of the electromagnetic wave of electric current
The dynamic state that remains a constant speed, thus enable the invention to export stable operating current, it is ensured that the brightness of LED etc.
Stability.
Present invention employs the integrated chip of high-precision L6569, this chip has that stability is strong, overtemperature protection,
The functions such as overcurrent protection, effectively raise the stability of the output electric current of the present invention.The present invention can have
In the service life of the prolongation LED of effect, the electricity of more than 50% can be saved simultaneously, thus meet people to LED
Lamp control system is in the demand of energy-conservation aspect.
According to above-described embodiment, can well realize the present invention.
Claims (5)
1. a reference current corrector cold light LED energy-saving electric power circuit, it is characterised in that mainly by
Control chip U2, transformator T, diode rectifier U1, negative pole is defeated with the positive pole of diode rectifier U1
Go out the polar capacitor C1 that end is connected, positive pole is connected with the cathode output end of diode rectifier U1, negative
Pole is connected with the CS pin of control chip U2, positive pole is managed with the RE of control chip U2 after inductance L
The polar capacitor C5 that foot is connected, one end is connected with the positive pole of polar capacitor C5, the other end and control core
The GND pin of sheet U2 be connected after the resistance R9 of ground connection, be serially connected in the non-of transformator T secondary inductance coil
Polar capacitor C9 between Same Name of Ends and Same Name of Ends, the VCC pin being serially connected in control chip U2 is managed with VS-
Reference current correcting circuit between foot, is serially connected in the crystalline substance between control chip U2 and reference current correcting circuit
Brake tube triggers circuit, and the low-pass filter circuit group being serially connected between diode rectifier U1 and transformator T
Become；Described reference current correcting circuit is connected with low-pass filter circuit and thyristor gating circuit respectively.
A kind of reference current corrector cold light LED energy-saving electric power circuit the most according to claim 1,
It is characterized in that, described low-pass filter circuit is by the positive pole of audion VT1, P pole Yu diode rectifier U1
The diode D1 that outfan is connected, N pole base stage with audion VT1 after adjustable resistance R2 is connected,
The polar capacitor that positive pole is connected with the P pole of diode D1, negative pole is connected with the base stage of audion VT1
After C2, P pole is connected with the positive pole of polar capacitor C2, N pole is connected with the colelctor electrode of audion VT1
The diode D3 of ground connection, one end is connected with the N pole of diode D1, the other end is sent out with audion VT1's
The resistance R3 that emitter-base bandgap grading is connected, and positive pole N pole with diode D1 after resistance R4 be connected, negative
The polar capacitor C3 composition that pole colelctor electrode with audion VT1 after resistance R5 is connected；Described audion
The base stage of VT1 is connected with reference current correcting circuit, and its colelctor electrode is connected with thyristor gating circuit.
A kind of reference current corrector cold light LED energy-saving electric power circuit the most according to claim 2,
It is characterized in that, described reference current correcting circuit by audion VT2, N pole after resistance R7 with control core
The VCC pin of sheet U is connected, P pole emitter stage with audion VT2 after resistance R8 is connected two
Pole pipe D2, positive pole is connected with the colelctor electrode of audion VT2, polar capacitor C4, the P pole of minus earth
After resistance R10 the base stage with audion VT2 be connected, the VS pin phase of N pole and control chip U2
The diode D4 connected, and positive pole sequentially negative with polar capacitor C4 after resistance R12 and resistance R11
Pole is connected, negative pole as the outfan of reference current correcting circuit and is connected with thyristor gating circuit
Polar capacitor C6 forms；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；Described
The N pole of diode D2 is connected with the base stage of audion VT1.
A kind of reference current corrector cold light LED energy-saving electric power circuit the most according to claim 3,
It is characterized in that, described thyristor gating circuit by field effect transistor MOS1, field effect transistor MOS2, one end with
The resistance that LO pin is connected, the other end is connected with the grid of field effect transistor MOS2 of control chip U2
R13, negative pole grid with field effect transistor MOS2 after resistance R15 is connected, positive pole and audion VT1
The polar capacitor C8 that is connected of emitter stage, negative pole is connected with the grid of field effect transistor MOS1, positive pole warp
The polar capacitor C7 being connected with the HC pin of control chip U2 after resistance R6, one end and field effect transistor
The resistance R14 that the source electrode of MOS1 is connected, the other end is connected with the VS+ pin of control chip U2, with
And P pole is connected with the source electrode of field effect transistor MOS2, N pole is non-with the former limit inductance coil of transformator T
The diode D5 composition that Same Name of Ends is connected；The grounded drain of described field effect transistor MOS2, its grid and pole
The negative pole of property electric capacity C6 is connected, and its source electrode is connected with the source electrode of field effect transistor MOS1；Described field effect
The Same Name of Ends of the drain electrode of pipe MOS1 limit former with transformator T inductance coil respectively and the emitter stage of audion VT1
It is connected.
A kind of reference current corrector cold light LED energy-saving electric power circuit the most according to claim 4,
It is characterized in that, described control chip U2 is the integrated chip of L6569.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380140.5A CN105916247A (en) | 2016-05-30 | 2016-05-30 | Reference current correction type energy-saving power supply circuit used for cold light LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380140.5A CN105916247A (en) | 2016-05-30 | 2016-05-30 | Reference current correction type energy-saving power supply circuit used for cold light LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105916247A true CN105916247A (en) | 2016-08-31 |
Family
ID=56741935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610380140.5A Pending CN105916247A (en) | 2016-05-30 | 2016-05-30 | Reference current correction type energy-saving power supply circuit used for cold light LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105916247A (en) |
-
2016
- 2016-05-30 CN CN201610380140.5A patent/CN105916247A/en active Pending
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Application publication date: 20160831 |