CN106061033A - Power supply circuit used for LED - Google Patents
Power supply circuit used for LED Download PDFInfo
- Publication number
- CN106061033A CN106061033A CN201610566534.XA CN201610566534A CN106061033A CN 106061033 A CN106061033 A CN 106061033A CN 201610566534 A CN201610566534 A CN 201610566534A CN 106061033 A CN106061033 A CN 106061033A
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- Prior art keywords
- pole
- pin
- electric capacity
- driving chip
- audion
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a power supply circuit used for an LED. The power supply circuit is characterized in that the power supply circuit is mainly composed of a driving chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, a diode D2, a power supply input circuit and a power supply output circuit. Power supply current and voltage can be processed by adopting a BP3108 integrated chip with combination of a peripheral circuit so that stable current is ensured to be provided to the LED, the lighting quality of the LED can be ensured, the service life of the LED can be enhanced and thus the power supply circuit used for the LED is suitable for popularization and application.
Description
Technical field
The present invention relates to a kind of power circuit, particularly relate to a kind of LED power circuit.
Background technology
LED gradually instead of traditional illuminating lamp because of features such as it is energy-conservation, length in service life, becomes the first-selection of people
Product.But, the most all there is operating current and be easily subject to the impact of supply current and occur in the power supply used at present due to LED
The problem of fluctuation, the operating current causing LED is unstable, thus have impact on the lighting quality of LED, and reduces the use of LED
Life-span.
Summary of the invention
The most all there is operating current and be easily subject to power supply electricity in the power supply that it is an object of the invention to overcome current LED to use
The impact of stream and the problem of fluctuation occurs, cause the defect that the operating current of LED is unstable, it is provided that one is not only simple in structure,
And the LED power circuit of stable electric current can be provided for LED.
The present invention is achieved through the following technical solutions:
A kind of LED power circuit, mainly by driving chip U1, respectively with VCC pin and the DIM pin of driving chip U1
The power supply input circuit being connected, one end is connected with power supply input circuit, the TRIAC pin phase of the other end and driving chip U1
Resistance R1, the P pole connected HCD pin with driving chip U1 after resistance R2 is connected, the VCC pipe of N pole and driving chip U1
The diode D1 that foot is connected, the power output circuit being connected with FB pin and the GATE pin of driving chip U1 respectively, P pole
With the diode D3 that HCD pin is connected, N pole is connected with power output circuit of driving chip U1, and positive pole and driving
The electric capacity C4 that VCC pin is connected, negative pole is connected with the power output circuit composition of chip U1；The CS of described driving chip U1
Pin is connected with GATE pin, its GND pin ground connection；The P pole of described diode D1 is connected with power supply input circuit.
Further, described power supply input circuit is by diode rectifier U2, field effect transistor Q, positive pole and diode rectification
The electric capacity C1 that the positive output end of device U2 is connected, negative pole is connected with the negative output terminal of diode rectifier U2, positive pole and electric capacity
The electric capacity C2 that the positive pole of C1 is connected, negative pole is connected with the negative pole of electric capacity C1, positive pole is connected with the source electrode of field effect transistor Q,
The electric capacity C3 that negative pole is connected with the P pole of diode D1, and P pole negative pole with electric capacity C3 after resistance R3 is connected, N pole with
The diode D2 composition that the DIM pin of driving chip U1 is connected；The grid of described field effect transistor Q respectively with electric capacity C2 and driving
The VCC pin of chip U1 is connected, and the negative pole of described electric capacity C3 is connected with the negative pole of electric capacity C2；Described diode rectifier U2
Two inputs collectively constitute the input of power supply input circuit.
Further, described power output circuit, by audion VT1, audion VT2, is serially connected in the FB of driving chip U1
Resistance R4 between the base stage of pin and audion VT1, is serially connected in the CS pin of driving chip U1 and the colelctor electrode of audion VT2
Between resistance R5, the resistance R6 being serially connected between the GATE pin of driving chip U1 and the N pole of diode D3, positive pole and driving
The electric capacity C5 that the GATE pin of chip U1 is connected, negative pole is connected with the colelctor electrode of audion VT1, positive pole is with diode D3's
Electric capacity C6, the P pole that N pole is connected, negative pole emitter stage with audion VT2 after resistance R7 is connected is sent out with audion VT1's
The diode D4 that emitter-base bandgap grading is connected, N pole base stage with audion VT2 after resistance R8 is connected, and P pole and audion VT1
Colelctor electrode be connected, the base stage of N pole and audion VT2 collectively constitutes the diode D5 group of outfan of power output circuit
Become；The emitter stage of described audion VT2 is connected with the colelctor electrode of audion VT1, the emitter stage of described audion VT1 and electric capacity
The negative pole of C4 is connected.
In order to ensure effect, described driving chip U1 is the integrated chip of BP3108.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention uses the integrated chip of BP3108 to combine peripheral circuit, can be to the electric current of power supply and voltage at
Reason, thus can ensure to provide stable electric current for LED, thus ensuring that the lighting quality of LED, and improve the service life of LED.
(2) current fluctuation can be controlled within 0.5 milliampere by the present invention, it is thus possible to current stabilization when guaranteeing LED operation,
And the life-span of LED can extend at least one thousand hour.
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 limited to this.
Embodiment
As it is shown in figure 1, the LED power circuit of the present invention, mainly by driving chip U1, resistance R1, resistance R2, electric capacity
C4, diode D1, diode D2, power supply input circuit and power output circuit composition.Concrete, described power supply input circuit
It is connected with the VCC pin of driving chip U1 and DIM pin respectively.One end of described resistance R1 is connected with power supply input circuit
Connecing, its other end is connected with the TRIAC pin of driving chip U1.The P pole of described diode D1 after resistance R2 with drive core
The HCD pin of sheet U1 is connected, and its N pole is connected with the VCC pin of driving chip U1.Described power output circuit respectively with drive
The FB pin of dynamic chip U1 is connected with GATE pin.The P pole of described diode D3 is connected with the HCD pin of driving chip U1
Connecing, its N pole is connected with power output circuit.The positive pole of described electric capacity C4 is connected with the VCC pin of driving chip U1, and it is born
Pole is connected with power output circuit.Meanwhile, the CS pin of described driving chip U1 is connected with GATE pin, its GND pin
Ground connection；The P pole of described diode D1 is connected with power supply input circuit.Wherein, described driving chip U1 preferentially uses BP3108
Integrated chip realizes.
Described power supply input circuit is by diode rectifier U2, field effect transistor Q, resistance R3, electric capacity C1, electric capacity C2, electric capacity
C3 and diode D2 composition.During connection, the positive pole of described electric capacity C1 is connected with the positive output end of diode rectifier U2, its
Negative pole is connected with the negative output terminal of diode rectifier U2.The positive pole of described electric capacity C2 is connected with the positive pole of electric capacity C1, its
Negative pole is connected with the negative pole of electric capacity C1.The described positive pole of electric capacity C3 is connected with the source electrode of field effect transistor Q, its negative pole and two poles
The P pole of pipe D1 is connected.The P pole of described diode D2 negative pole with electric capacity C3 after resistance R3 is connected, its N pole with drive core
The DIM pin of sheet U1 is connected.Meanwhile, the grid of described field effect transistor Q respectively with the VCC pin of electric capacity C2 and driving chip U1
Being connected, the negative pole of described electric capacity C3 is connected with the negative pole of electric capacity C2.Two inputs of described diode rectifier U2 are altogether
With the input of composition power supply input circuit, this input external power supply.
Described power output circuit is by audion VT1, audion VT2, resistance R4, resistance R5, resistance R6, resistance R7, electricity
Resistance R8, electric capacity C5, electric capacity C6, diode D4 and diode D5 composition.During connection, described resistance R4 is serially connected in driving chip U1
FB pin and the base stage of audion VT1 between, described resistance R5 is serially connected in the CS pin of driving chip U1 and audion VT2's
Between colelctor electrode, described resistance R6 is serially connected between the GATE pin of driving chip U1 and the N pole of diode D3.Described electric capacity C5
Positive pole be connected with the GATE pin of driving chip U1, its negative pole is connected with the colelctor electrode of audion VT1.Described electric capacity C6
Positive pole be connected with the N pole of diode D3, its negative pole emitter stage with audion VT2 after resistance R7 is connected.Described two
The P pole of pole pipe D4 is connected with the emitter stage of audion VT1, and its N pole base stage with audion VT2 after resistance R8 is connected.
The P pole of described diode D5 is connected with the colelctor electrode of audion VT1, and its N pole collectively constitutes power supply with the base stage of audion VT2
The outfan of output circuit, this outfan is connected with LED.Meanwhile, the emitter stage of described audion VT2 is with audion VT1's
Colelctor electrode is connected, and the emitter stage of described audion VT1 is connected with the negative pole of electric capacity C4.
The present invention uses the integrated chip of BP3108 to combine peripheral circuit, can process the electric current of power supply and voltage,
Thus can ensure to provide stable electric current for LED, thus ensuring that the lighting quality of LED, and improve the service life of LED.This
Current fluctuation can be controlled within 0.5 milliampere by invention, it is thus possible to current stabilization when guaranteeing LED operation, and the life-span energy of LED
Extend at least one thousand hour.
As it has been described above, just can preferably realize the present invention.
Claims (4)
1. a LED power circuit, it is characterised in that: mainly by driving chip U1, respectively with the VCC pin of driving chip U1
The power supply input circuit being connected with DIM pin, one end is connected with power supply input circuit, the other end and driving chip U1
Resistance R1, the P pole that TRIAC pin is connected HCD pin with driving chip U1 after resistance R2 is connected, N pole with drive core
The diode D1 that the VCC pin of sheet U1 is connected, the power supply being connected with FB pin and the GATE pin of driving chip U1 respectively
Output circuit, the diode D3 that HCD pin is connected, N pole is connected with power output circuit of P pole and driving chip U1, with
And positive pole forms with the electric capacity C4 that VCC pin is connected, negative pole is connected with power output circuit of driving chip U1；Described drive
The CS pin of dynamic chip U1 is connected with GATE pin, its GND pin ground connection；The P pole of described diode D1 and power supply input electricity
Road is connected.
A kind of LED power circuit the most according to claim 1, it is characterised in that: described power supply input circuit is by two poles
Pipe commutator U2, field effect transistor Q, positive pole is connected with the positive output end of diode rectifier U2, negative pole and diode rectifier
The electric capacity C1 that the negative output terminal of U2 is connected, positive pole is connected with the positive pole of electric capacity C1, negative pole is connected with the negative pole of electric capacity C1
Electric capacity C2, the electric capacity C3 that positive pole is connected with the source electrode of field effect transistor Q, negative pole is connected with the P pole of diode D1, and P
Pole diode D2 group that negative pole is connected, N pole is connected with the DIM pin of driving chip U1 with electric capacity C3 after resistance R3
Become；The grid of described field effect transistor Q is connected with the VCC pin of electric capacity C2 and driving chip U1 respectively, and described electric capacity C3's is negative
Pole is connected with the negative pole of electric capacity C2；Two inputs of described diode rectifier U2 collectively constitute the defeated of power supply input circuit
Enter end.
A kind of LED power circuit the most according to claim 2, it is characterised in that: described power output circuit is by three poles
Pipe VT1, audion VT2, the resistance R4 being serially connected between the FB pin of driving chip U1 and the base stage of audion VT1, it is serially connected in
Resistance R5 between CS pin and the colelctor electrode of audion VT2 of driving chip U1, is serially connected in the GATE pin of driving chip U1
And the resistance R6 between the N pole of diode D3, positive pole is connected with the GATE pin of driving chip U1, negative pole and audion VT1
The electric capacity C5 that is connected of colelctor electrode, positive pole is connected with the N pole of diode D3, negative pole after resistance R7 with audion VT2's
Electric capacity C6, the P pole that emitter stage is connected is connected with the emitter stage of audion VT1, N pole after resistance R8 with audion VT2's
The diode D4 that base stage is connected, and P pole is connected with the colelctor electrode of audion VT1, N pole is total to the base stage of audion VT2
Diode D5 composition with the outfan of composition power output circuit；The emitter stage of described audion VT2 and the collection of audion VT1
Electrode is connected, and the emitter stage of described audion VT1 is connected with the negative pole of electric capacity C4.
A kind of LED power circuit the most according to claim 3, it is characterised in that: described driving chip U1 is BP3108
Integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566534.XA CN106061033A (en) | 2016-07-18 | 2016-07-18 | Power supply circuit used for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566534.XA CN106061033A (en) | 2016-07-18 | 2016-07-18 | Power supply circuit used for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106061033A true CN106061033A (en) | 2016-10-26 |
Family
ID=57187915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610566534.XA Pending CN106061033A (en) | 2016-07-18 | 2016-07-18 | Power supply circuit used for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106061033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769557A (en) * | 2019-11-29 | 2020-02-07 | 怀化职业技术学院 | Lamp control device and system |
-
2016
- 2016-07-18 CN CN201610566534.XA patent/CN106061033A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769557A (en) * | 2019-11-29 | 2020-02-07 | 怀化职业技术学院 | Lamp control device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161026 |
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| WD01 | Invention patent application deemed withdrawn after publication |