CN107682965A - A kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit - Google Patents
A kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit Download PDFInfo
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- CN107682965A CN107682965A CN201711008920.8A CN201711008920A CN107682965A CN 107682965 A CN107682965 A CN 107682965A CN 201711008920 A CN201711008920 A CN 201711008920A CN 107682965 A CN107682965 A CN 107682965A
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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 formula triode filter 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, triode filter 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 based on three-terminal voltage-stabilizing formula triode filter circuit
Use power 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 formula triode filter 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 formula triode filter circuit, mainly by driving chip U1, P poles
It is connected after resistance R2 with driving chip U1 HCD pins, VCC of the N poles with driving chip U1 after three-terminal voltage-stabilizing circuit is managed
The diode D1 that pin is connected, the power input electricity being connected respectively with diode D1 N poles and driving chip U1 DIM pins
Road, the emitter-base bandgap grading drive circuit being connected respectively with the HCD pins of power supply input circuit and driving chip U1, one end and power input
The resistance R1 that circuit is connected, the other end is connected with driving chip U1 TRIAC pins, managed respectively with driving chip U1 FB
The power output circuit that pin is connected with GATE pins, HCD pin phase of the P poles after triode filter circuit with driving chip U1
The diode D3 that connection, N poles are connected with power output circuit, and positive pole are connected with driving chip U1 VCC pins, born
The electric capacity C4 compositions that pole is connected with power output circuit；The CS pins of the driving chip U1 are connected with GATE pins, its
GND pins are grounded；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 triode filter circuit is by triode VT5, and triode VT6, positive pole is with driving chip U1's
Electric capacity C7, the P pole that HCD pins are connected, negative pole is connected after inductance L with triode VT5 base stage and electric capacity C7 negative pole
It is connected, the diode D6 that N poles are connected after resistance R11 with triode VT5 emitter stage, the hair of positive pole and triode VT5
Emitter-base bandgap grading is connected, electric capacity C8, the P pole of negative pole ground connection is connected with triode VT5 colelctor electrode, N poles and triode VT5 base stage
The diode D7 being connected, the resistance R9 being serially connected between triode VT5 colelctor electrode and triode VT6 colelctor electrode, concatenation
Resistance R10 between triode VT5 emitter stage and triode VT6 base stage, it is serially connected in triode VT5 emitter stage and three
Resistance R12 between pole pipe VT6 emitter stage, positive pole is connected after resistance R13 with triode VT6 emitter stage, negative pole connects
The electric capacity C9 on ground, and P poles are connected with triode VT6 emitter stage, base stage phase of the N poles after resistance R14 with triode VT6
The diode D8 compositions of connection；The base stage of the triode VT6 is connected with diode D3 P poles.
Further, the three-terminal voltage-stabilizing circuit is by three terminal regulator U3, triode VT7, the N of positive pole and diode D1
Electric capacity C10, the P pole that pole is connected, negative pole is connected after resistance R15 with three terminal regulator U3 VIN pins is after resistance R16
Be connected with electric capacity C10 negative pole, the voltage-regulator diode D9 that N poles are connected with three terminal regulator U3 VOUT pins, positive pole with
The electric capacity C11 that voltage-regulator diode D9 N poles are connected, negative pole is connected with triode VT7 colelctor electrode, positive pole and triode
Electric capacity C12, the P poles that VT7 colelctor electrode is connected, negative pole is connected after resistance R20 with triode VT7 colelctor electrode are through resistance
Be connected after R17 with electric capacity C12 negative pole, diode D11, P pole that N poles are connected with three terminal regulator U3 VIN pins with
The voltage-regulator diode D10 that triode VT7 colelctor electrode is connected, N poles are connected after resistance R18 with electric capacity C11 negative pole, with
And the resistance R18 groups that one end is connected with triode VT7 emitter stage, the other end is connected with voltage-regulator diode D10 N poles
Into；The base stage of the triode VT7 is connected with three terminal regulator U3 VOUT pins, the GND pipes of the three terminal regulator U3
Pin is grounded；The N poles of the voltage-regulator diode D10 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.
In order to which the present invention is better achieved, the power output circuit triode VT2, is serially connected in driving by triode VT1
Resistance R4 between chip U1 FB pins and triode VT1 base stage, it is serially connected in driving chip U1 CS pins and triode
Resistance R5 between VT2 colelctor electrode, the resistance being serially connected between driving chip U1 GATE pins and diode D3 N poles
R6, the electric capacity C5 that positive pole is connected with driving chip U1 GATE pins, negative pole is connected with triode VT1 colelctor electrode, just
Pole is connected with diode D3 N poles, negative pole is connected after resistance R7 with triode VT2 emitter stage electric capacity C6, P pole with
The diode D4 that triode VT1 emitter stage is connected, N poles are connected after resistance R8 with triode VT2 base stage, and P
Pole is connected with triode VT1 colelctor electrode, N poles and triode VT2 base stage collectively constitute the output end of power output circuit
Diode D5 composition；The emitter stage of the triode VT2 is connected with triode VT1 colelctor electrode, the triode VT1's
Emitter stage is connected with electric capacity C4 negative pole.
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 be filtered processing to whole power circuit, can filter out harmonic wave and sheet that external power source is brought
Ripple caused by inside the power circuit of invention, therefore the stability of the electric signal of the present invention can be ensured, so that it is guaranteed that LED operation
When stability.
(4) 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 triode filter circuit of the present invention.
Fig. 4 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 present invention the LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit, mainly by
Driving chip U1, resistance R1, resistance R2, electric capacity C4, diode D1, diode D2, power supply input circuit, emitter-base bandgap grading drive circuit,
Triode filter circuit, three-terminal voltage-stabilizing circuit and power output circuit composition.Specifically, the P poles of the diode D1 are through electricity
It is connected after resistance R2 with driving chip U1 HCD pins, VCC pin of its N pole after three-terminal voltage-stabilizing circuit with driving chip U1
It is connected.The power supply input circuit is connected with diode D1 N poles and driving chip U1 DIM pins respectively.The electricity
Resistance R1 one end is connected with power supply input circuit, and its other end is connected with driving chip U1 TRIAC pins.The power supply
Output circuit is connected with driving chip U1 FB pins and GATE pins respectively.Filtered through triode the P poles of the diode D3
It is connected after wave circuit with driving chip U1 HCD pins, its N pole is connected with power output circuit.The electric capacity C4 is just
Pole is connected with driving chip U1 VCC pins, and its negative pole is connected with power output circuit.Meanwhile the driving chip U1
CS pins be connected with GATE pins, its GND pin ground connection；The P poles of the diode D1 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 triode filter circuit is by triode VT5, triode VT6, inductance L, resistance R9, resistance
R10, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C7, electric capacity C8, electric capacity C9, diode D6, diode D7 with
And diode D8 compositions.
During connection, the positive pole of the electric capacity C7 is connected with driving chip U1 HCD pins, its negative pole after inductance L with
Triode VT5 base stage is connected.The P poles of the diode D6 are connected with electric capacity C7 negative pole, and its N pole is after resistance R11
It is connected with triode VT5 emitter stage.The positive pole of the electric capacity C8 is connected with triode VT5 emitter stage, and its negative pole connects
Ground.The P poles of the diode D7 are connected with triode VT5 colelctor electrode, and its N pole is connected with triode VT5 base stage.Institute
State resistance R9 to be serially connected between triode VT5 colelctor electrode and triode VT6 colelctor electrode, the resistance R10 is serially connected in three poles
Between pipe VT5 emitter stage and triode VT6 base stage, the resistance R12 is serially connected in triode VT5 emitter stage and triode
Between VT6 emitter stage.Emitter stage of the positive pole of the electric capacity C9 with triode VT6 after resistance R13 is connected, and its negative pole connects
Ground.The P poles of the diode D8 are connected with triode VT6 emitter stage, its base of N poles after resistance R14 with triode VT6
Pole is connected.Meanwhile the base stage of the triode VT6 is connected with diode D3 P poles.
As shown in figure 4, the three-terminal voltage-stabilizing circuit is by three terminal regulator U3, triode VT7, resistance R15, resistance R16, electricity
Hinder R17, resistance R18, resistance R19, resistance R20, electric capacity C10, electric capacity C11, electric capacity C12, voltage-regulator diode D9, voltage-regulator diode
D10 and diode D11 compositions.
During connection, the positive pole of the electric capacity C10 is connected with diode D1 N poles, its negative pole after resistance R15 with three ends
Voltage-stablizer U3 VIN pins are connected.Negative pole of the P poles of the voltage-regulator diode D9 with electric capacity C10 after resistance R16 is connected
Connect, its N pole is connected with three terminal regulator U3 VOUT pins.The N poles phase of the positive pole of the electric capacity C11 and voltage-regulator diode D9
Connection, its negative pole are connected with triode VT7 colelctor electrode.The positive pole of the electric capacity C12 is connected with triode VT7 colelctor electrode
Connect, colelctor electrode of its negative pole with triode VT7 after resistance R20 is connected.The P poles of the diode D11 after resistance R17 with
Electric capacity C12 negative pole is connected, and its N pole is connected with three terminal regulator U3 VIN pins.The P poles of the voltage-regulator diode D10
It is connected with triode VT7 colelctor electrode, its negative pole of N poles with electric capacity C11 after resistance R18 is connected.The resistance R18's
One end is connected with triode VT7 emitter stage, and its other end is connected with voltage-regulator diode D10 N poles.Meanwhile described three
Pole pipe VT7 base stage is connected with three terminal regulator U3 VOUT pins, the GND pins ground connection of the three terminal regulator U3；Institute
Voltage-regulator diode D10 N poles are stated with driving chip U1 VCC pins to be connected.
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
Filtering process, ripple caused by inside harmonic wave that external power source brings and the power circuit of the present invention can be filtered out, therefore can protected
The stability of the electric signal of the present invention is demonstrate,proved, so that it is guaranteed that stability during LED operation.Also, the present invention can also be to whole power supply
Circuit carries out voltage stabilizing processing, can guarantee that the voltage by stabilization for LED, thereby further ensures that the stability of LED operation electric current.
As described above, it can preferably realize the present invention.
Claims (6)
- A kind of 1. LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit, it is characterised in that：Mainly by driving core Piece U1, P pole is connected after resistance R2 with driving chip U1 HCD pins, N poles after three-terminal voltage-stabilizing circuit with driving chip U1 The diode D1 that is connected of VCC pins, the electricity being connected respectively with diode D1 N poles and driving chip U1 DIM pins Source input circuit, the emitter-base bandgap grading drive circuit being connected respectively with the HCD pins of power supply input circuit and driving chip U1, one end with The resistance R1 that power supply input circuit is connected, the other end is connected with driving chip U1 TRIAC pins, respectively with driving chip The power output circuit that U1 FB pins are connected with GATE pins, P poles are after triode filter circuit with driving chip U1's The diode D3 that HCD pins are connected, N poles are connected with power output circuit, and the VCC pins of positive pole and driving chip U1 It is connected, the electric capacity C4 compositions that negative pole is connected with power output circuit；The CS pins of the driving chip U1 and GATE pins It is connected, its GND pin ground connection；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.
- 2. a kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit according to claim 1, it is special Sign is：The triode filter circuit is connected by triode VT5, triode VT6, positive pole with driving chip U1 HCD pins Connect, electric capacity C7, the P pole that negative pole is connected after inductance L with triode VT5 base stage is connected with electric capacity C7 negative pole, N poles warp The diode D6 being connected after resistance R11 with triode VT5 emitter stage, positive pole are connected with triode VT5 emitter stage, born Electric capacity C8, the P pole of pole ground connection is connected with triode VT5 colelctor electrode, two poles that N poles are connected with triode VT5 base stage Pipe D7, the resistance R9 being serially connected between triode VT5 colelctor electrode and triode VT6 colelctor electrode, is serially connected in triode VT5's Resistance R10 between emitter stage and triode VT6 base stage, is serially connected in triode VT5 emitter stage and triode VT6 transmitting Resistance R12 between pole, positive pole is connected after resistance R13 with triode VT6 emitter stage, the electric capacity C9 of negative pole ground connection, with And the diode that P poles are connected with triode VT6 emitter stage, N poles are connected after resistance R14 with triode VT6 base stage D8 is formed；The base stage of the triode VT6 is connected with diode D3 P poles.
- 3. a kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit according to claim 2, it is special Sign is：The three-terminal voltage-stabilizing circuit is connected with diode D1 N poles, born by three terminal regulator U3, triode VT7, positive pole Electric capacity C10, the P pole that pole is connected after resistance R15 with three terminal regulator U3 VIN pins is after resistance R16 with electric capacity C10's The voltage-regulator diode D9 that negative pole is connected, N poles are connected with three terminal regulator U3 VOUT pins, positive pole and voltage-regulator diode D9 N poles be connected, the electric capacity C11 that negative pole is connected with triode VT7 colelctor electrode, the colelctor electrode phase of positive pole and triode VT7 Connection, electric capacity C12, the P pole that is connected after resistance R20 with triode VT7 colelctor electrode of negative pole after resistance R17 with electric capacity Diode D11, the P pole that C12 negative pole is connected, N poles are connected with three terminal regulator U3 VIN pins is with triode VT7's The voltage-regulator diode D10 that colelctor electrode is connected, N poles are connected after resistance R18 with electric capacity C11 negative pole, and one end and three The resistance R18 compositions that pole pipe VT7 emitter stage is connected, the other end is connected with voltage-regulator diode D10 N poles；Three pole Pipe VT7 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 Voltage-regulator diode D10 N poles are connected with driving chip U1 VCC pins.
- 4. a kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit according to claim 3, it is special Sign is：The power supply input circuit is just defeated with diode rectifier U2's by diode rectifier U2, FET Q1, positive pole Go out end be connected, the electric capacity C1 that negative pole is connected with diode rectifier U2 negative output terminal, the positive pole phase of positive pole and electric capacity C1 Connection, the electric capacity C2 that is connected with electric capacity C1 negative pole of negative pole, positive pole is connected with FET Q1 source electrode, negative pole and two poles The electric capacity C3 that pipe D1 P poles are connected, and P poles are connected after resistance R3 with electric capacity C3 negative pole, N poles and driving chip U1 DIM pins be connected diode D2 composition；The grid of FET Q1 P poles with electric capacity C2 and diode D1 respectively It is connected, the negative pole of the electric capacity C3 is connected with electric capacity C2 negative pole；Two inputs of the diode rectifier U2 are total to With the input of composition power supply input circuit, the resistance R101 is serially connected between electric capacity C1 and FET Q2 grid.
- 5. a kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit according to claim 4, it is special Sign is：The power output circuit is serially connected in driving chip U1 FB pins and triode by triode VT1, triode VT2 Resistance R4 between VT1 base stage, the resistance being serially connected between driving chip U1 CS pins and triode VT2 colelctor electrode R5, the resistance R6 being serially connected between driving chip U1 GATE pins and diode D3 N poles, positive pole is with driving chip U1's The electric capacity C5 that GATE pins are connected, negative pole is connected with triode VT1 colelctor electrode, positive pole are extremely connected with diode D3 N Connect, electric capacity C6, the P pole that negative pole is connected after resistance R7 with triode VT2 emitter stage is connected with triode VT1 emitter stage Connect, the diode D4 that N poles are connected after resistance R8 with triode VT2 base stage, and P poles and triode VT1 colelctor electrode It is connected, the diode D5 for the output end that N poles and triode VT2 base stage collectively constitute power output circuit is formed；Described three Pole pipe VT2 emitter stage is connected with triode VT1 colelctor electrode, the emitter stage of the triode VT1 and electric capacity C4 negative pole It is connected.
- 6. a kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit according to claim 5, it is special Sign is：The driving chip U1 is BP3108 integrated chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008920.8A CN107682965A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008920.8A CN107682965A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107682965A true CN107682965A (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711008920.8A Pending CN107682965A (en) | 2017-10-25 | 2017-10-25 | A kind of LED power circuits based on three-terminal voltage-stabilizing formula triode filter circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107682965A (en) |
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2017
- 2017-10-25 CN CN201711008920.8A patent/CN107682965A/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 |