CN107682968A - A kind of LED power circuits based on three-terminal voltage-stabilizing circuit - Google Patents
A kind of LED power circuits based on three-terminal voltage-stabilizing circuit Download PDFInfo
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- CN107682968A CN107682968A CN201711015144.4A CN201711015144A CN107682968A CN 107682968 A CN107682968 A CN 107682968A CN 201711015144 A CN201711015144 A CN 201711015144A CN 107682968 A CN107682968 A CN 107682968A
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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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Abstract
The invention discloses a kind of LED power circuits based on three-terminal voltage-stabilizing circuit, it is characterised in that：Mainly it is made up of driving chip U1, resistance R1, resistance R2, electric capacity C4, diode D1, diode D2, power supply input circuit, emitter-base bandgap grading drive circuit, three-terminal voltage-stabilizing circuit and power output circuit.The present invention combines the circuit of periphery using BP3108 integrated chips, and the electric current and voltage of power supply can be handled, so as to ensure to provide stable electric current for LED, thus ensuring that LED lighting quality, and LED service life is improved, it is adapted to promote the use.
Description
Technical field
The present invention relates to a kind of power circuit, more particularly to a kind of LED power circuits based on three-terminal voltage-stabilizing circuit.
Background technology
LED because its energy-conservation, service life is long the features such as and gradually instead of traditional illuminating lamp, become the first choice of people
Product.But easily occurred at present because the LED power supplys used all have operating current mostly by the influence of supply current
The problem of fluctuation, cause LED operating current unstable, so as to have impact on LED lighting quality, and reduce LED use
Life-span.
The content of the invention
It is an object of the invention to overcome the power supply that current LED is used operating current to be mostly all present easily by power supply electricity
The influence of stream and there is the problem of fluctuation, the defects of causing LED operating current unstable, there is provided one kind is not only simple in structure,
And the LED power circuits based on three-terminal voltage-stabilizing 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 circuits based on three-terminal voltage-stabilizing circuit, mainly by driving chip U1, P poles after resistance R2 with
Driving chip U1 HCD pins are connected, N poles are connected after three-terminal voltage-stabilizing circuit with driving chip U1 VCC pins two
Pole pipe D1, the resistance R1 that one end is connected with power supply input circuit, the other end is connected with driving chip U1 TRIAC pins,
The power output circuit being connected respectively with driving chip U1 FB pins and GATE pins, respectively with diode D1 N poles and
The power supply input circuit that driving chip U1 DIM pins are connected, P poles are connected with driving chip U1 HCD pins, N poles with
The diode D3 that power output circuit is connected, and positive pole is connected with driving chip U1 VCC pins, negative pole and power supply are defeated
Go out the electric capacity C4 compositions that circuit is connected；The CS pins of the driving chip U1 are connected with GATE pins, and its GND pin connects
Ground；The P poles of the diode D1 are connected with power supply input circuit；
The emitter-base bandgap grading drive circuit by FET Q2, triode VT3, triode VT4, be serially connected in power supply input circuit with
Resistance R101 between FET Q2 grid, positive pole is connected with FET Q2 grid, negative pole is after resistance R102
The electric capacity C101 of ground connection, the electricity that positive pole is connected with FET Q2 source electrode, negative pole is connected with triode VT3 colelctor electrode
Hold C102, positive pole is connected with triode VT3 emitter stage, negative pole be grounded electric capacity C103, P pole after resistance R103 with three poles
Diode D101, the P pole that pipe VT4 colelctor electrode is connected, N poles are connected with FET Q2 drain electrode is negative with electric capacity C102's
The diode D102 that pole is connected, N poles are connected with triode VT4 emitter stage, it is serially connected in triode VT3 base stage and three poles
Resistance R104 between pipe VT4 base stage, and P poles are connected with electric capacity C103 negative pole, N poles after resistance R105 with three poles
The diode D103 compositions that pipe VT4 emitter stage is connected；The base stage of the triode VT4 and driving chip U1 HCD pins
It is connected.
Further, the three-terminal voltage-stabilizing circuit is by three terminal regulator U3, triode VT5, the N poles of positive pole and diode D1
Be connected, electric capacity C7, P pole that negative pole is connected after resistance R9 with three terminal regulator U3 VIN pins after resistance R10 with electricity
Appearance C7 negative pole is connected, the voltage-regulator diode D6 that N poles are connected with three terminal regulator U3 VOUT pins, positive pole and voltage stabilizing two
The electric capacity C8 that pole pipe D6 N poles are connected, negative pole is connected with triode VT5 colelctor electrode, the current collection of positive pole and triode VT5
Electric capacity C9, the P pole that pole is connected, negative pole is connected after resistance R14 with triode VT5 colelctor electrode after resistance R11 with electricity
Diode D8, the P pole that appearance C9 negative pole is connected, N poles are connected with three terminal regulator U3 VIN pins is with triode VT5's
The voltage-regulator diode D7 that colelctor electrode is connected, N poles are connected after resistance R12 with electric capacity C8 negative pole, and one end and three poles
The resistance R12 compositions that pipe VT5 emitter stage is connected, the other end is connected with voltage-regulator diode D7 N poles；The triode
VT5 base stage is connected with three terminal regulator U3 VOUT pins, the GND pins ground connection of the three terminal regulator U3；It is described steady
Pressure diode D7 N poles are connected with driving chip U1 VCC pins.
Further, the power supply input circuit is whole with diode by diode rectifier U2, FET Q1, positive pole
Stream device U2 positive output end is connected, the electric capacity C1 that negative pole is connected with diode rectifier U2 negative output terminal, positive pole and electricity
Appearance C1 positive pole is connected, the electric capacity C2 that negative pole is connected with electric capacity C1 negative pole, and positive pole is connected with FET Q1 source electrode
Connect, the electric capacity C3 that negative pole is connected with diode D1 P poles, and P poles are connected after resistance R3 with electric capacity C3 negative pole, N
The diode D2 compositions that pole is connected with driving chip U1 DIM pins；The grid of the FET Q1 respectively with electric capacity C2
It is connected with diode D1 P poles, the negative pole of the electric capacity C3 is connected with electric capacity C2 negative pole；The diode rectifier U2
Two inputs collectively constitute the input of power supply input circuit, the resistance R101 is serially connected in electric capacity C1 and FET Q2
Grid between.
Further, the power output circuit is serially connected in driving chip U1 FB by triode VT1, triode VT2
Resistance R4 between pin and triode VT1 base stage, is serially connected in driving chip U1 CS pins and triode VT2 colelctor electrode
Between resistance R5, the resistance R6 being serially connected between driving chip U1 GATE pins and diode D3 N poles, positive pole with driving
The electric capacity C5 that chip U1 GATE pins are connected, negative pole is connected with triode VT1 colelctor electrode, positive pole is with diode D3's
Electric capacity C6, the P pole that N poles are connected, negative pole is connected after resistance R7 with triode VT2 emitter stage and triode VT1 hair
The diode D4 that emitter-base bandgap grading is connected, N poles are connected after resistance R8 with triode VT2 base stage, and P poles and triode VT1
Colelctor electrode be connected, N poles and triode VT2 base stage collectively constitute power output circuit output end diode D5 groups
Into；The emitter stage of the triode VT2 is connected with triode VT1 colelctor electrode, the emitter stage and electric capacity of the triode VT1
C4 negative pole is connected.
In order to ensure effect, the driving chip U1 is BP3108 integrated chips.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) present invention using BP3108 integrated chips combine periphery circuit, can be to the electric current and voltage of power supply at
Reason, so as to ensure to provide stable electric current for LED, thus ensuring that LED lighting quality, and improve LED service life.
(2) present invention can control current fluctuation within 0.5 milliampere, and electric current during so as to can ensure that LED operation is stable,
And LED life-span can extend at least 1,000 hours.
(3) present invention can carry out voltage stabilizing processing to whole power circuit, can guarantee that to be voltages of the LED by stabilization, so as to
Ensure the stability of LED operation electric current.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the overall structure diagram of the emitter-base bandgap grading drive circuit of the present invention.
Fig. 3 is the circuit diagram of the three-terminal voltage-stabilizing circuit of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment
As shown in figure 1, the LED power circuits based on three-terminal voltage-stabilizing circuit of the present invention, mainly by driving chip U1, electricity
Hinder R1, resistance R2, electric capacity C4, diode D1, diode D2, power supply input circuit, three-terminal voltage-stabilizing circuit, emitter-base bandgap grading drive circuit with
And power output circuit composition.Specifically, HCD pin phase of the P poles of the diode D1 after resistance R2 with driving chip U1
Connection, its N pole is connected after three-terminal voltage-stabilizing circuit with driving chip U1 VCC pins.The power supply input circuit respectively with
Diode D1 N poles are connected with driving chip U1 DIM pins.One end of the resistance R1 is connected with power supply input circuit
Connect, its other end is connected with driving chip U1 TRIAC pins.The power output circuit FB with driving chip U1 respectively
Pin is connected with GATE pins.The P poles of the diode D3 are connected with driving chip U1 HCD pins, its N pole and power supply
Output circuit is connected.The positive pole of the electric capacity C4 is connected with driving chip U1 VCC pins, its negative pole and power supply output electricity
Road is connected.Meanwhile the CS pins of the driving chip U1 are connected with GATE pins, its GND pin ground connection；The diode
D1 P poles are connected with power supply input circuit.Wherein, the driving chip U1 is preferentially realized using BP3108 integrated chips.
The power supply input circuit is by diode rectifier U2, FET Q1, resistance R3, electric capacity C1, electric capacity C2, electric capacity
C3 and diode D2 compositions.During connection, the positive pole of the electric capacity C1 is connected with diode rectifier U2 positive output end, its
Negative pole is connected with diode rectifier U2 negative output terminal.The positive pole of the electric capacity C2 is connected with electric capacity C1 positive pole, its
Negative pole is connected with electric capacity C1 negative pole.The positive pole of the electric capacity C3 is connected with FET Q1 source electrode, its negative pole and two
Pole pipe D1 P poles are connected.Negative pole of the P poles of the diode D2 with electric capacity C3 after resistance R3 is connected, its N pole and driving
Chip U1 DIM pins are connected.Meanwhile the grid of the FET Q1 P poles phase with electric capacity C2 and diode D1 respectively
Connection, the negative pole of the electric capacity C3 are connected with electric capacity C2 negative pole.Two inputs of the diode rectifier U2 are common
Form the input of power supply input circuit, the input external power supply.
The power output circuit is by triode VT1, triode VT2, resistance R4, resistance R5, resistance R6, resistance R7, electricity
Hinder R8, electric capacity C5, electric capacity C6, diode D4 and diode D5 composition.During connection, the resistance R4 is serially connected in driving chip U1
FB pins and triode VT1 base stage between, the resistance R5 is serially connected in driving chip U1 CS pins and triode VT2's
Between colelctor electrode, the resistance R6 is serially connected between driving chip U1 GATE pins and diode D3 N poles.The electric capacity C5
Positive pole be connected with driving chip U1 GATE pins, its negative pole is connected with triode VT1 colelctor electrode.The electric capacity C6
Positive pole be connected with diode D3 N poles, emitter stage of its negative pole with triode VT2 after resistance R7 is connected.Described two
Pole pipe D4 P poles are connected with triode VT1 emitter stage, and its base stage of N poles with triode VT2 after resistance R8 is connected.
The P poles of the diode D5 are connected with triode VT1 colelctor electrode, and its N pole and triode VT2 base stage collectively constitute power supply
The output end of output circuit, the output end are connected with LED.Meanwhile the emitter stage of the triode VT2 is with triode VT1's
Colelctor electrode is connected, and the emitter stage of the triode VT1 is connected with electric capacity C4 negative pole.
As shown in Fig. 2 the emitter-base bandgap grading drive circuit is by FET Q2, triode VT3, triode VT4, resistance R101,
Resistance R102, resistance R103, resistance R104, resistance R105, electric capacity C101, electric capacity C102, electric capacity C103, diode D101, two
Pole pipe D102, and diode D103 compositions.
During connection, the resistance R101 is serially connected between electric capacity C1 and FET Q2 grid.The electric capacity C101's
Positive pole is connected with FET Q2 grid, and negative pole is grounded after resistance R102.The positive pole of the electric capacity C102 and field-effect
Pipe Q2 source electrode is connected, and negative pole is connected with triode VT3 colelctor electrode.The positive pole of the electric capacity C103 and triode VT3
Emitter stage be connected, negative pole ground connection.Colelctor electrode phase of the P poles of the diode D101 after resistance R103 with triode VT4
Connection, N poles are connected with FET Q2 drain electrode.The P poles of the diode D102 are connected with electric capacity C102 negative pole, N
Pole is connected with triode VT4 emitter stage.The resistance R104 is serially connected in triode VT3 base stage and triode VT4 base
Between pole.The P poles of the diode D103 are connected with electric capacity C103 negative pole, and N poles are after resistance R105 with triode VT4's
The composition that emitter stage is connected；The base stage of the triode VT4 is connected with driving chip U1 DIM pins.
As shown in figure 3, the three-terminal voltage-stabilizing circuit is by three terminal regulator U3, triode VT5, resistance R9, resistance R10, electricity
Hinder R11, resistance R12, resistance R13, resistance R14, electric capacity C7, electric capacity C8, electric capacity C9, voltage-regulator diode D6, voltage-regulator diode D7
And diode D8 compositions.
During connection, the positive pole of the electric capacity C7 is connected with diode D1 N poles, and its negative pole is steady with three ends after resistance R9
Depressor U3 VIN pins are connected.Negative pole of the P poles of the voltage-regulator diode D6 with electric capacity C7 after resistance R10 is connected, its
N poles are connected with three terminal regulator U3 VOUT pins.The positive pole of the electric capacity C8 is connected with voltage-regulator diode D6 N poles,
Its negative pole is connected with triode VT5 colelctor electrode.The positive pole of the electric capacity C9 is connected with triode VT5 colelctor electrode, its
Colelctor electrode of the negative pole with triode VT5 after resistance R14 is connected.The P poles of the diode D8 after resistance R11 with electric capacity C9
Negative pole be connected, its N pole is connected with three terminal regulator U3 VIN pins.The P poles of the voltage-regulator diode D7 and triode
VT5 colelctor electrode is connected, and its negative pole of N poles with electric capacity C8 after resistance R12 is connected.One end and three of the resistance R12
Pole pipe VT5 emitter stage is connected, and its other end is connected with voltage-regulator diode D7 N poles.Meanwhile the triode VT5
Base stage is connected with three terminal regulator U3 VOUT pins, the GND pins ground connection of the three terminal regulator U3；The pole of voltage stabilizing two
Pipe D7 N poles are connected with driving chip U1 VCC pins.
The present invention combines the circuit of periphery using BP3108 integrated chips, and the electric current and voltage of power supply can be handled,
So as to ensure to provide stable electric current for LED, thus ensuring that LED lighting quality, and improve LED service life.This
Invention is provided with emitter-base bandgap grading drive circuit between power input and driving chip U1, can effectively improve driving chip U1 driving
Ability, and stability when can ensure that LED operation.The present invention can control current fluctuation within 0.5 milliampere, so as to can ensure that
Electric current during LED operation is stable, and LED life-span can extend at least 1,000 hours.The present invention can be carried out to whole power circuit
Voltage stabilizing is handled, and can guarantee that to be voltages of the LED by stabilization, so that it is guaranteed that the stability of LED operation electric current.
As described above, it can preferably realize the present invention.
Claims (5)
- A kind of 1. LED power circuits based on three-terminal voltage-stabilizing circuit, it is characterised in that：Mainly by driving chip U1, P poles are through electricity It is connected after resistance R2 with driving chip U1 HCD pins, VCC pin phase of the N poles after three-terminal voltage-stabilizing circuit with driving chip U1 The diode D1 of connection, one end is connected with power supply input circuit, the other end is connected with driving chip U1 TRIAC pins Resistance R1, the power output circuit being connected respectively with driving chip U1 FB pins and GATE pins, respectively with diode D1 The power supply input circuit that is connected with driving chip U1 DIM pins of N poles, P poles are connected with driving chip U1 HCD pins Connect, the diode D3 that N poles are connected with power output circuit, and positive pole is connected with driving chip U1 VCC pins, negative pole The electric capacity C4 compositions being connected with power output circuit；The CS pins of the driving chip U1 are connected with GATE pins, its GND Pin is grounded；The P poles of the diode D1 are connected with power supply input circuit；The emitter-base bandgap grading drive circuit is serially connected in power supply input circuit and imitated with field by FET Q2, triode VT3, triode VT4 Resistance R101 that should be between pipe Q2 grid, positive pole is connected with FET Q2 grid, negative pole is grounded after resistance R102 Electric capacity C101, the electric capacity that positive pole is connected with FET Q2 source electrode, negative pole is connected with triode VT3 colelctor electrode C102, positive pole is connected with triode VT3 emitter stage, negative pole ground connection electric capacity C103, P pole after resistance R103 with triode Diode D101, the P pole that VT4 colelctor electrode is connected, N poles are connected with FET Q2 drain electrode and electric capacity C102 negative pole It is connected, the diode D102 that N poles are connected with triode VT4 emitter stage, is serially connected in triode VT3 base stage and triode Resistance R104 between VT4 base stage, and P poles are connected with electric capacity C103 negative pole, N poles after resistance R105 with triode The diode D103 compositions that VT4 emitter stage is connected；The base stage of the triode VT4 and driving chip U1 HCD pin phases Connection.
- A kind of 2. LED power circuits based on three-terminal voltage-stabilizing circuit according to claim 1, it is characterised in that：It is described Three-terminal voltage-stabilizing circuit is by three terminal regulator U3, triode VT5, and positive pole is connected with diode D1 N poles, negative pole is after resistance R9 Electric capacity C7, the P pole being connected with three terminal regulator U3 VIN pins is connected after resistance R10 with electric capacity C7 negative pole, N poles The voltage-regulator diode D6 being connected with three terminal regulator U3 VOUT pins, positive pole are connected with voltage-regulator diode D6 N poles, born The electric capacity C8 that pole is connected with triode VT5 colelctor electrode, positive pole is connected with triode VT5 colelctor electrode, negative pole is through resistance Electric capacity C9, the P pole being connected after R14 with triode VT5 colelctor electrode is connected after resistance R11 with electric capacity C9 negative pole, N poles Diode D8, the P pole being connected with three terminal regulator U3 VIN pins is connected with triode VT5 colelctor electrode, N poles are through electricity The voltage-regulator diode D7 that is connected with electric capacity C8 negative pole after resistance R12, and one end be connected with triode VT5 emitter stage, The resistance R12 compositions that the other end is connected with voltage-regulator diode D7 N poles；The base stage and three terminal regulator of the triode VT5 U3 VOUT pins are connected, the GND pins ground connection of the three terminal regulator U3；The N poles of the voltage-regulator diode D7 and driving Chip U1 VCC pins are connected.
- A kind of 3. LED power circuits based on three-terminal voltage-stabilizing circuit according to claim 2, it is characterised in that：It is described Power supply input circuit is by diode rectifier U2, FET Q1, positive pole is connected with diode rectifier U2 positive output end, The electric capacity C1 that negative pole is connected with diode rectifier U2 negative output terminal, positive pole is connected with electric capacity C1 positive pole, negative pole with The electric capacity C2 that electric capacity C1 negative pole is connected, positive pole is connected with FET Q1 source electrode, negative pole and diode D1 P poles phase The electric capacity C3 of connection, and P poles are connected after resistance R3 with electric capacity C3 negative pole, N poles and driving chip U1 DIM pin phases The diode D2 compositions of connection；P pole of the grid of the FET Q1 respectively with electric capacity C2 and diode D1 is connected, described Electric capacity C3 negative pole is connected with electric capacity C2 negative pole；It is defeated that two inputs of the diode rectifier U2 collectively constitute power supply Enter the input of circuit, the resistance R101 is serially connected between electric capacity C1 and FET Q2 grid.
- A kind of 4. LED power circuits based on three-terminal voltage-stabilizing circuit according to claim 3, it is characterised in that：It is described Power output circuit by triode VT1, triode VT2, be serially connected in driving chip U1 FB pins and triode VT1 base stage it Between resistance R4, the resistance R5 being serially connected between driving chip U1 CS pins and triode VT2 colelctor electrode, be serially connected in driving Resistance R6 between chip U1 GATE pins and diode D3 N poles, positive pole is connected with driving chip U1 GATE pins, The electric capacity C5 that negative pole is connected with triode VT1 colelctor electrode, positive pole is connected with diode D3 N poles, negative pole is through resistance R7 Electric capacity C6, the P pole being connected afterwards with triode VT2 emitter stage is connected with triode VT1 emitter stage, N poles are through resistance R8 The diode D4 being connected afterwards with triode VT2 base stage, and P poles are connected with triode VT1 colelctor electrode, N poles and three Pole pipe VT2 base stage collectively constitutes the diode D5 compositions of the output end of power output circuit；The emitter stage of the triode VT2 It is connected with triode VT1 colelctor electrode, the emitter stage of the triode VT1 is connected with electric capacity C4 negative pole.
- A kind of 5. LED power circuits based on three-terminal voltage-stabilizing circuit according to claim 4, it is characterised in that：It is described Driving chip U1 is BP3108 integrated chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015144.4A CN107682968A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015144.4A CN107682968A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107682968A true CN107682968A (en) | 2018-02-09 |
Family
ID=61142394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711015144.4A Pending CN107682968A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107682968A (en) |
-
2017
- 2017-10-25 CN CN201711015144.4A patent/CN107682968A/en active Pending
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180209 |
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| WD01 | Invention patent application deemed withdrawn after publication |