CN106231720A - A kind of many processing of circuit type LED dimming drive power - Google Patents
A kind of many processing of circuit type LED dimming drive power Download PDFInfo
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- CN106231720A CN106231720A CN201610601728.9A CN201610601728A CN106231720A CN 106231720 A CN106231720 A CN 106231720A CN 201610601728 A CN201610601728 A CN 201610601728A CN 106231720 A CN106231720 A CN 106231720A
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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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- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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Abstract
The invention discloses a kind of many processing of circuit type LED dimming drive power, it is characterized in that, main by control chip U2, diode rectifier U1, transformator T, field effect transistor MOS1, audion VT1, diode D1, polar capacitor C3, current regulating circuit, pulsed triggering circuit, half-bridge drive circuit, the micro-processor interface circuit composition between the ripple peak restrained circuit being serially connected between the cathode output end of diode rectifier U1 and the emitter stage of audion VT1 and the colelctor electrode being serially connected in audion VT1 and transformator T former limit inductance coil L3.The high transient state of voltage and current can be adjusted by the present invention, there is drift in the frequency preventing electric current, makes voltage and current held stationary, ensures that the present invention can export stable voltage, can prevent LED lamplight from the phenomenon of flicker occurring, effectively extend the service life of LED.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of many processing of circuit type LED dimming drive power.
Background technology
Under the background that global energy shortage, environmental requirement improve constantly, countries in the world are all greatly developed green energy conservation and are shone
Bright.LED illumination, as a kind of revolutionary energy-saving illumination technology, develops rapidly, wherein the brightness energy of Dimmable LED according to
Ambient brightness is adjusted and is widely used by people.But, there is output voltage instability in existing LED dimming drive power
Problem, causes LED lamplight the phenomenon of flicker, the serious service life that have impact on LED occur, thus cannot meet wanting of people
Ask.
Therefore it provides the LED dimming drive power of a kind of output voltage stabilization is the task of top priority.
Summary of the invention
It is an object of the invention to overcome existing existing LEDLED lamp dimming drive power of the prior art to exist defeated
Go out the defect of spread of voltage, it is provided that one many processing of circuit type LED dimming drive power.
The present invention is achieved through the following technical solutions: a kind of many processing of circuit type LED dimming drive power, mainly by controlling
Coremaking sheet U2, diode rectifier U1, transformator T, field effect transistor MOS1, audion VT1, it is serially connected in diode rectifier U1's
Ripple peak restrained circuit between the emitter stage of cathode output end and audion VT1, respectively with transformator T secondary inductance coil
The half-bridge drive circuit that the Same Name of Ends of L5 is connected with non-same polarity, positive pole is connected with the cathode output end of diode rectifier U1
Connect, negative pole be connected with the cathode output end of diode rectifier U1 after the polar capacitor C1 of ground connection, negative pole and diode rectification
The cathode output end of device U1 is connected, positive pole is connected with the grid of field effect transistor MOS1 polar capacitor C2, P pole and field effect
The diode D1 that the grid of pipe MOS1 is connected, N pole is connected with the source electrode of field effect transistor MOS1 after resistance R1, one end and field
The inductance L1 that the grid of effect pipe MOS1 is connected, the other end is connected with the N pole of diode D1, positive pole is with audion VT1's
The polar capacitor C3 that base stage is connected, negative pole is connected with the VDD pin of control chip U2 after resistance R20, positive pole and transformation
The non-same polarity of the L5 of device T secondary inductance coil is connected, negative pole is connected with the Same Name of Ends of the L5 of transformator T secondary inductance coil
The polar capacitor C12 connect, the respectively Same Name of Ends of limit inductance coil L4 former with transformator T and control chip U2 and diode D1
The current regulating circuit that N pole is connected, is serially connected in the pulsed triggering circuit between control chip U2 and transformator T, and concatenation
Micro-processor interface circuit composition between the colelctor electrode and transformator T former limit inductance coil L3 of audion VT1；Described diode rectification
The cathode output end of device U1 is also connected with the drain electrode of field effect transistor MOS1；The emitter stage of described audion VT1 respectively with two poles
The N pole of pipe D1 is connected with the DIM pin of control chip U2；Described micro-processor interface circuit also former with transformator T limit inductance coil L4
Same Name of Ends be connected；The non-same polarity ground connection of described transformator T former limit inductance coil L4.
Described ripple peak restrained electricity routing amplifier P, field effect transistor MOS5, audion VT8, N pole after resistance R36 with
The diode D14 that the source electrode of field effect transistor MOS5 is connected, P pole is connected with the cathode output end of diode rectifier U1, just
P pole with diode D14 after resistance R35, pole is connected, polar capacitor C19, the P pole of minus earth and field effect transistor MOS5
The diode D15 that drain electrode is connected, N pole is connected with the negative pole of polar capacitor C19, positive pole is extremely connected with the N of diode D14
Connect, polar capacitor C20 that negative pole is connected with the N pole of diode D15 after resistance R37, the positive pole of one end and polar capacitor C20
Be connected, adjustable resistance R38 that the other end is connected with the emitter stage of audion VT8, negative pole is connected with the positive pole of amplifier P
Connect, polar capacitor C21 that positive pole is connected with the N pole of diode D14 after resistance R39, the positive pole of one end and polar capacitor C21
Be connected, resistance R40, the P pole of other end ground connection is connected with the base stage of audion VT8, N pole after resistance R42 with amplifier P
The diode D16 that is connected of negative pole, negative pole outfan with amplifier P after resistance R45 is connected, positive pole is through resistance R43
The polar capacitor C23 being connected with the N pole of diode D16 afterwards, and positive pole after resistance R44 with the negative pole of polar capacitor C23
Be connected, polar capacitor C22 composition that negative pole colelctor electrode with audion VT8 after resistance R41 is connected；Described polar capacitor
The negative pole of C22 be connected with the N pole of diode D16 after ground connection；The colelctor electrode of described audion VT8 also with the N pole of diode D15
It is connected；The grid of described field effect transistor MOS5 is connected with the adjustable end of adjustable resistance R38；Described polar capacitor C23's is negative
Pole also emitter stage with audion VT1 is connected.
Described half-bridge drive circuit is by field effect transistor MOS4, audion VT5, audion VT6, and audion VT7, N pole is through electricity
Be connected with the base stage of audion VT5 after resistance R26, P pole is connected with the non-same polarity of transformator T secondary inductance coil L5 two
Pole pipe D11, negative pole colelctor electrode with audion VT5 after resistance R29 is connected, positive pole after resistance R25 with diode D11's
The polar capacitor C14 that N pole is connected, positive pole is connected with the N pole of diode D11, negative pole after resistance R27 with audion VT6
The polar capacitor C15 that is connected of base stage, positive pole colelctor electrode with audion VT6 after resistance R31 is connected, negative pole and three poles
The colelctor electrode of pipe VT7 be connected after the polar capacitor C18 of ground connection, negative pole after adjustable resistance R30 with the emitter stage of audion VT5
Be connected, polar capacitor C17 that positive pole is connected with the emitter stage of audion VT7, negative pole after resistance R33 with field effect transistor
The grid of MOS4 is connected, positive pole negative pole with polar capacitor C14 after resistance R28 is connected polar capacitor C16, N are the most electric
Be connected with the positive pole of polar capacitor C16 after resistance R34, P pole is connected with the base stage of the audion VT7 of field effect transistor MOS4 two
Pole pipe D13, and P pole positive pole with polar capacitor C16 after resistance R32 is connected, the source electrode phase of N pole and field effect transistor MOS4
The Zener diode D12 composition connected；The negative pole of described polar capacitor C15 also colelctor electrode with audion VT6 is connected and is followed by
Ground；The colelctor electrode of described audion VT6 also Same Name of Ends with transformator T secondary inductance coil L5 is connected, its emitter stage and three
The emitter stage of pole pipe VT5 is connected；The base stage of described audion VT7 is also connected with the drain electrode of field effect transistor MOS4；Described three
The base stage of pole pipe VT7 and the N pole of Zener diode D12 are collectively forming the outfan of half-bridge drive circuit.
Further, described current regulating circuit by audion VT2, field effect transistor MOS2, N pole after resistance R21 with change
Two poles that the Same Name of Ends of depressor T former limit inductance coil L4 is connected, be connected with the colelctor electrode of audion VT2 after P electrode resistance R2
Pipe D2, P pole is connected with the colelctor electrode of audion VT2, N pole is connected with the DIM pin of control chip U2 after resistance R3
Diode D3, the inductance L2 that one end is connected with the N pole of diode D3, the other end is connected with the DIM pin of control chip U2,
The polarity electricity that positive pole is connected with the base stage of audion VT2, negative pole is connected with the VS pin of control chip U2 after resistance R4
Hold C4, the resistance R5 that one end is connected, the other end is connected with the source electrode of field effect transistor MOS2 with the positive pole of polar capacitor C4, just
The polarity electricity that pole is connected with the negative pole of polar capacitor C4, negative pole is connected with the drain electrode of field effect transistor MOS2 after resistance R10
Hold C6, the resistance R6, P that one end is connected, the other end is connected with the COM pin of control chip U2 with the positive pole of polar capacitor C6
Diode D5, the P pole and three that pole is connected with the source electrode of field effect transistor MOS2, N pole is connected with the drain electrode of field effect transistor MOS2
The diode D4 that the emitter stage of pole pipe VT2 is connected, be connected with the drain electrode of field effect transistor MOS2 after the adjustable resistance R7 of N pole, with
And positive pole is connected with the N pole of diode D4, negative pole sequentially after resistance R8 and resistance R9 with the drain electrode phase of field effect transistor MOS2
The polar capacitor C5 composition connected；The N pole of described diode D4 is connected with the grid of field effect transistor MOS2；Described polar capacitor
The negative pole of C6 be connected with the NC pin of control chip U2 after ground connection.
Described pulsed triggering circuit by audion VT3, audion VT4, P pole after resistance R14 with the CS of control chip U2
The diode D6 that pin is connected, N pole is connected with the base stage of audion VT3, positive pole is connected with the base stage of audion VT3,
It is connected with the colelctor electrode of audion VT3 after polar capacitor C7, P electrode resistance R11 that negative pole is connected with the colelctor electrode of audion VT3
Connect, diode D7 that N pole colelctor electrode with audion VT4 after resistance R13 is connected, negative pole after adjustable resistance R18 with change
The polar capacitor C8 that non-same polarity is connected, positive pole is connected with the P pole of diode D7 of depressor T secondary inductance coil L5, one
The resistance R12 that end is connected with the negative pole of polar capacitor C8, the other end is connected with the P pole of diode D7, positive pole and control core
Polar capacitor C9, the N pole that the GATE pin of sheet U2 is connected, negative pole emitter stage with audion VT3 after resistance R15 is connected
Be connected with the negative pole of polar capacitor C9, P pole Same Name of Ends of limit inductance coil L4 former with transformator T after resistance R19 is connected
Diode D8, the Same Name of Ends of positive pole limit former with transformator T inductance coil L4 is connected, negative pole after resistance R16 with diode
The polar capacitor C11 that the N pole of D8 is connected, and positive pole is connected with the Same Name of Ends of transformator T secondary inductance coil L5, negative pole
The polar capacitor C10 composition that emitter stage with audion VT4 is connected after resistance R17；The negative pole of described polar capacitor C11 is also
It is connected with the emitter stage of audion VT4；The negative pole of described polar capacitor C10 also positive pole with polar capacitor C8 is connected；Institute
The emitter stage of the base stage and audion VT3 of stating audion VT4 is connected；The positive pole of described polar capacitor C7 also with control chip U2
NC pin be connected.
Described micro-processor interface circuit is by field effect transistor MOS3, and P pole is connected with the source electrode of field effect transistor MOS3, N pole and transformation
The non-same polarity of device T and former limit inductance coil L3 be connected after the Zener diode D9 of ground connection, one end and transformator T and former limit electricity
Adjustable resistance R24, the N pole that Same Name of Ends is connected, the other end is connected with the drain electrode of field effect transistor MOS3 of sense coil L3 and change
Depressor T is connected with the Same Name of Ends of former limit inductance coil L3, the drain electrode with field effect transistor MOS2 after resistance R23 of P pole is connected
Diode D10, and negative pole is connected with the P pole of diode D10, positive pole after resistance R22 with the leakage of field effect transistor MOS3
The polar capacitor C13 composition that pole is connected；The grid of described field effect transistor MOS3 limit former with transformator T inductance coil L4's is of the same name
End is connected；The positive pole of described polar capacitor C13 is connected with the colelctor electrode of audion VT1.
For the practical effect of the present invention, it is real that described control chip U2 the most preferentially uses the integrated chip of FL7730
Existing.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the high transient state of voltage and current can be adjusted by the present invention, prevents the frequency of electric current from drift occur, makes voltage
With electric current held stationary, ensure that the present invention can export stable voltage, can prevent LED lamplight from the phenomenon of flicker occurring,
Effectively extend the service life of LED.
(2) harmonic wave in input voltage can be eliminated or suppress by the present invention, and can flow to wave energising pressure and wave energising
Row suppression, thus improve the stability of output voltage of the present invention.
(3) output voltage can be suppressed because of the magnetic bias that unbalanced drive waveforms produces or eliminate by the present invention, makes defeated
The driving voltage gone out keeps consistent with reference voltage, it is ensured that the stability of the voltage of present invention output；And the present invention passes through
After suppressing the fluctuation of output voltage, the load capacity effectively raising the drive efficiency of the present invention, the i.e. present invention carries
High by more than 60%.
(4) present invention has stronger capacity of resisting disturbance, and can carry out power amplification by triggering pulse, thus improves
The stability of output voltage of the present invention, and also improve load capacity.
(5) the control chip U2 of the present invention uses the integrated chip of FL7730 to realize, and this chip and external circuit phase
In conjunction with, stability and the controllability of the voltage of present invention output can be improved.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the half-bridge drive circuit of the present invention.
Fig. 3 is the electrical block diagram of the ripple peak restrained circuit 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 embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, diode rectifier U1, transformator T, field effect transistor MOS1,
Audion VT1, resistance R1, resistance R20, polar capacitor C1, polar capacitor C2, polar capacitor C3, polar capacitor C12, diode
D1, inductance L, ripple peak restrained circuit, half-bridge drive circuit, current regulating circuit, pulsed triggering circuit, and micro-process electricity
Road forms.
During connection, ripple peak restrained circuit is serially connected in the cathode output end of diode rectifier U1 with audion VT1's
Between emitter stage.Half-bridge drive circuit is connected with Same Name of Ends and the non-same polarity of transformator T secondary inductance coil L5 respectively.Pole
The property positive pole of electric capacity C1 is connected with the cathode output end of diode rectifier U1, and negative pole is defeated with the negative pole of diode rectifier U1
Go out ground connection after end is connected.The negative pole of polar capacitor C2 is connected with the cathode output end of diode rectifier U1, positive pole and field
The grid of effect pipe MOS1 is connected.The P pole of diode D1 is connected with the grid of field effect transistor MOS1, and N pole is after resistance R1
It is connected with the source electrode of field effect transistor MOS1.One end of inductance L1 is connected with the grid of field effect transistor MOS1, the other end and two
The N pole of pole pipe D1 is connected.
Wherein, the positive pole of polar capacitor C3 is connected with the base stage of audion VT1, negative pole after resistance R20 with control core
The VDD pin of sheet U2 is connected.Positive pole be connected with the non-same polarity of the L5 of transformator T secondary inductance coil, polar capacitor
C12 negative pole is connected with the Same Name of Ends of the L5 of transformator T secondary inductance coil.Current regulating circuit limit former with transformator T respectively
The Same Name of Ends of inductance coil L4 is connected with the N pole of control chip U2 and diode D1.Pulsed triggering circuit is serially connected in control
Between chip U2 and transformator T.Micro-processor interface circuit is serially connected in colelctor electrode and the transformator T former limit inductance coil L3 of audion VT1
Between.
The cathode output end of described diode rectifier U1 is also connected with the drain electrode of field effect transistor MOS1；Described audion
The emitter stage of VT1 is connected with the N pole of diode D1 and the DIM pin of control chip U2 respectively；Described micro-processor interface circuit also with
The Same Name of Ends of transformator T former limit inductance coil L4 is connected；The non-same polarity ground connection of described transformator T former limit inductance coil L4.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated chip of FL7730 to realize.
The present invention is when implementing, and two inputs of described diode rectifier U1 are collectively forming the LED light modulation of the present invention
Drive the input of power supply and be connected with external power source；The base stage of described audion VT7 is the most common with the N of Zener diode D12
With formed half-bridge drive circuit outfan, this outfan and as the present invention LED dimming drive power outfan and with
LED is connected.
Further, described current regulating circuit is by audion VT2, field effect transistor MOS2, resistance R2, resistance R3, resistance
R4, resistance R5, resistance R6, adjustable resistance R7, resistance R8, resistance R9, resistance R10, resistance R21, polar capacitor C4, polar capacitor
C5, polar capacitor C6, diode D2, diode D3, diode D4, diode D5 and inductance L2 form.
During connection, the N pole of diode D2 Same Name of Ends of limit inductance coil L4 former with transformator T after resistance R21 is connected,
After P electrode resistance R2, the colelctor electrode with audion VT2 is connected.The P pole of diode D3 is connected with the colelctor electrode of audion VT2, N
Pole DIM pin with control chip U2 after resistance R3 is connected.One end of inductance L2 is connected, separately with the N pole of diode D3
One end is connected with the DIM pin of control chip U2.
Wherein, the positive pole of polar capacitor C4 is connected with the base stage of audion VT2, negative pole after resistance R4 with control chip
The VS pin of U2 is connected.One end of resistance R5 is connected with the positive pole of polar capacitor C4, the other end and field effect transistor MOS2
Source electrode is connected.The positive pole of polar capacitor C6 is connected with the negative pole of polar capacitor C4, negative pole after resistance R10 with field effect transistor
The drain electrode of MOS2 is connected.One end of resistance R6 is connected with the positive pole of polar capacitor C6, the other end and the COM of control chip U2
Pin is connected.The P pole of diode D5 is connected with the source electrode of field effect transistor MOS2, the drain electrode phase of N pole and field effect transistor MOS2
Connect.
Meanwhile, the P pole of diode D4 is connected with the emitter stage of audion VT2, with field effect transistor after the adjustable resistance R7 of N pole
The drain electrode of MOS2 is connected.The positive pole of polar capacitor C5 is connected with the N pole of diode D4, and negative pole is sequentially through resistance R8 and resistance
After R9, the drain electrode with field effect transistor MOS2 is connected.The N pole of described diode D4 is connected with the grid of field effect transistor MOS2；Institute
The NC pin of the negative pole and control chip U2 of stating polar capacitor C6 be connected after ground connection.
Further, described pulsed triggering circuit is by audion VT3, audion VT4, resistance R11, resistance R12, resistance
R13, resistance R14, resistance R15, resistance R16, resistance R17, adjustable resistance R18, resistance R19, polar capacitor C7, polar capacitor
C8, polar capacitor C9, polar capacitor C10, polar capacitor C11, diode D6, diode D7, and diode D8 form.
During connection, the P pole of diode D6 CS pin with control chip U2 after resistance R14 is connected, N pole and audion
The base stage of VT3 is connected.The positive pole of polar capacitor C7 is connected with the base stage of audion VT3, negative pole and the current collection of audion VT3
Pole is connected.After P electrode resistance R11 of diode D7, the colelctor electrode with audion VT3 is connected, N pole after resistance R13 with three poles
The colelctor electrode of pipe VT4 is connected.
Wherein, the negative pole of polar capacitor C8 after adjustable resistance R18 with the non-same polarity of transformator T secondary inductance coil L5
Being connected, positive pole is connected with the P pole of diode D7.One end of resistance R12 is connected with the negative pole of polar capacitor C8, the other end
It is connected with the P pole of diode D7.The positive pole of polar capacitor C9 is connected with the GATE pin of control chip U2, and negative pole is through resistance
After R15, the emitter stage with audion VT3 is connected.
Meanwhile, the N pole of diode D8 is connected with the negative pole of polar capacitor C9, and P pole is former with transformator T after resistance R19
The Same Name of Ends of limit inductance coil L4 is connected.The Same Name of Ends phase of the positive pole of polar capacitor C11 limit former with transformator T inductance coil L4
Connecting, negative pole N pole with diode D8 after resistance R16 is connected.The positive pole of polar capacitor C10 and transformator T secondary inductance
The Same Name of Ends of coil L5 is connected, and negative pole emitter stage with audion VT4 after resistance R17 is connected.
The negative pole of described polar capacitor C11 also emitter stage with audion VT4 is connected；Described polar capacitor C10's is negative
Pole also positive pole with polar capacitor C8 is connected；The base stage of described audion VT4 is connected with the emitter stage of audion VT3；Institute
The positive pole stating polar capacitor C7 is also connected with the NC pin of control chip U2.
Yet further, described micro-processor interface circuit by field effect transistor MOS3, resistance R22, resistance R23, adjustable resistance R24,
Polar capacitor C13, Zener diode D9, and diode D10 form.
During connection, the P pole of Zener diode D9 is connected with the source electrode of field effect transistor MOS3, N pole and transformator T and former limit
The non-same polarity of inductance coil L3 be connected after ground connection.One end of adjustable resistance R24 is with transformator T and former limit inductance coil L3's
Same Name of Ends is connected, and the other end is connected with the drain electrode of field effect transistor MOS3.
Wherein, the N pole of diode D10 is connected with the Same Name of Ends of transformator T with former limit inductance coil L3, and P pole is through resistance
After R23, the drain electrode with field effect transistor MOS2 is connected.The negative pole of polar capacitor C13 is connected with the P pole of diode D10, positive pole
After resistance R22, the drain electrode with field effect transistor MOS3 is connected.The grid of described field effect transistor MOS3 and transformator T former limit inductance
The Same Name of Ends of coil L4 is connected；The positive pole of described polar capacitor C13 is connected with the colelctor electrode of audion VT1.
As in figure 2 it is shown, described half-bridge drive circuit is by field effect transistor MOS4, audion VT5, audion VT6, audion
VT7, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, adjustable resistance R30, resistance R31, resistance R32, resistance
R33, resistance R34, polar capacitor C14, polar capacitor C15, polar capacitor C16, polar capacitor C17, polar capacitor C18, two poles
Pipe D11, Zener diode D12, and diode D13 form.
During connection, the N pole of diode D11 base stage with audion VT5 after resistance R26 is connected, P pole and transformator T
The non-same polarity of secondary inductance coil L5 is connected.The negative pole of polar capacitor C14 after resistance R29 with the current collection of audion VT5
Pole is connected, and positive pole N pole with diode D11 after resistance R25 is connected.The positive pole of polar capacitor C15 is with diode D11's
N pole is connected, and negative pole base stage with audion VT6 after resistance R27 is connected.The positive pole of polar capacitor C18 is after resistance R31
Be connected with the colelctor electrode of audion VT6, negative pole be connected with the colelctor electrode of audion VT7 after ground connection.
Wherein, the negative pole of polar capacitor C17 emitter stage with audion VT5 after adjustable resistance R30 is connected, positive pole with
The emitter stage of audion VT7 is connected.The negative pole of polar capacitor C16 grid with field effect transistor MOS4 after resistance R33 is connected
Connecing, positive pole negative pole with polar capacitor C14 after resistance R28 is connected.With polar capacitor after N electrode resistance R34 of diode D13
The positive pole of C16 is connected, and P pole is connected with the base stage of the audion VT7 of field effect transistor MOS4.The P pole warp of Zener diode D12
After resistance R32, the positive pole with polar capacitor C16 is connected, and N pole is connected with the source electrode of field effect transistor MOS4.
The negative pole of described polar capacitor C15 also colelctor electrode with audion VT6 be connected after ground connection；Described audion VT6
Colelctor electrode also Same Name of Ends with transformator T secondary inductance coil L5 be connected, the emitter stage phase of its emitter stage and audion VT5
Connect；The base stage of described audion VT7 is also connected with the drain electrode of field effect transistor MOS4；The base stage of described audion VT7 is with steady
The N pole of pressure diode D12 is collectively forming the outfan of half-bridge drive circuit.
As it is shown on figure 3, described ripple peak restrained electricity routing amplifier P, field effect transistor MOS5, audion VT8, resistance
R35, resistance R36, resistance R37, adjustable resistance R38, resistance R39, resistance R40, resistance R41, resistance R42, resistance R43, resistance
R44, resistance R45, polar capacitor C19, polar capacitor C20, polar capacitor C21, polar capacitor C22, polar capacitor C23, two poles
Pipe D14, diode D15, and diode D16 form.
During connection, the N pole of diode D14 source electrode with field effect transistor MOS5 after resistance R36 is connected, P pole and two poles
The cathode output end of pipe commutator U1 is connected.The positive pole of polar capacitor C19 P with diode D14 after resistance R35 is extremely connected
Connect, minus earth.The P pole of diode D15 is connected with the drain electrode of field effect transistor MOS5, the negative pole phase of N pole and polar capacitor C19
Connect.The positive pole of polar capacitor C20 is connected with the N pole of diode D14, negative pole after resistance R37 with the N pole of diode D15
It is connected.One end of adjustable resistance R38 is connected with the positive pole of polar capacitor C20, the emitter stage phase of the other end and audion VT8
Connect.
Wherein, the negative pole of polar capacitor C21 is connected with the positive pole of amplifier P, positive pole after resistance R39 with diode
The N pole of D14 is connected.One end of resistance R40 is connected with the positive pole of polar capacitor C21, other end ground connection.The P of diode D16
Pole is connected with the base stage of audion VT8, and N pole negative pole with amplifier P after resistance R42 is connected.Polar capacitor C23's is negative
Pole outfan with amplifier P after resistance R45 is connected, and positive pole N pole with diode D16 after resistance R43 is connected.Pole
The positive pole of property electric capacity C22 negative pole with polar capacitor C23 after resistance R44 is connected, negative pole after resistance R41 with audion
The colelctor electrode of VT8 is connected.
The negative pole of described polar capacitor C22 be connected with the N pole of diode D16 after ground connection；The current collection of described audion VT8
Pole is also connected with the N pole of diode D15；The grid of described field effect transistor MOS5 is connected with the adjustable end of adjustable resistance R38；
The negative pole of described polar capacitor C23 also emitter stage with audion VT1 is connected.
During operation, the high transient state of voltage and current can be adjusted by the present invention, prevents the frequency of electric current from drift occur, makes
Voltage and current held stationary, ensures that the present invention can export stable voltage, can prevent LED lamplight from showing of flicker occur
As, effectively extend the service life of LED.Meanwhile, output voltage can be produced by the present invention because of unbalanced drive waveforms
Magnetic bias carries out suppressing or eliminating, and makes the driving voltage of output keep consistent with reference voltage, it is ensured that the voltage of present invention output
Stability；And after the present invention is by suppressing the fluctuation of output voltage, effectively raise the driving effect of the present invention
The load capacity of rate, the i.e. present invention improves more than 60%.
Meanwhile, harmonic wave in input voltage can be eliminated or suppress by the present invention, and can be to wave energising pressure and wave galvanization
Suppress, thus improve the stability of output voltage of the present invention.The present invention has a stronger capacity of resisting disturbance, and can be by
Trigger pulse and carry out power amplification, thus improve the stability of output voltage of the present invention, and also improve load capacity.This
The control chip U2 of invention uses the integrated chip of FL7730 to realize, and this chip combines with external circuit, can improve this
The stability of the voltage of invention output and controllability.
According to above-described embodiment, can well realize the present invention.
Claims (7)
1. processing of circuit type LED dimming drive power more than a kind, it is characterised in that main by control chip U2, diode rectification
Device U1, transformator T, field effect transistor MOS1, audion VT1, it is serially connected in cathode output end and the audion of diode rectifier U1
Ripple peak restrained circuit between the emitter stage of VT1, respectively with the Same Name of Ends of transformator T secondary inductance coil L5 and non-of the same name
The half-bridge drive circuit that end is connected, positive pole is connected with the cathode output end of diode rectifier U1, negative pole is whole with diode
The cathode output end of stream device U1 be connected after the polar capacitor C1 of ground connection, the cathode output end phase of negative pole and diode rectifier U1
Polar capacitor C2, the P pole that connection, positive pole are connected with the grid of field effect transistor MOS1 is connected with the grid of field effect transistor MOS1
Connect, diode D1 that N pole is connected with the source electrode of field effect transistor MOS1 after resistance R1, the grid of one end and field effect transistor MOS1
Be connected, inductance L1 that the other end is connected with the N pole of diode D1, positive pole is connected with the base stage of audion VT1, negative pole warp
The polar capacitor C3 being connected with the VDD pin of control chip U2 after resistance R20, positive pole and transformator T secondary inductance coil
The polar capacitor C12 that the non-same polarity of L5 is connected, negative pole is connected with the Same Name of Ends of the L5 of transformator T secondary inductance coil,
The electric current that the Same Name of Ends of limit inductance coil L4 former with transformator T and the N pole of control chip U2 and diode D1 are connected respectively
Regulation circuit, is serially connected in the pulsed triggering circuit between control chip U2 and transformator T, and is serially connected in the collection of audion VT1
Micro-processor interface circuit composition between electrode and transformator T former limit inductance coil L3；The negative pole output of described diode rectifier U1
End is also connected with the drain electrode of field effect transistor MOS1；The emitter stage of described audion VT1 respectively with N pole and the control of diode D1
The DIM pin of chip U2 is connected；The Same Name of Ends of described micro-processor interface circuit also former with transformator T limit inductance coil L4 is connected；
The non-same polarity ground connection of described transformator T former limit inductance coil L4.
One many processing of circuit type LED dimming drive power the most according to claim 1, it is characterised in that described ripple
Peak restrained electricity routing amplifier P, field effect transistor MOS5, audion VT8, N pole after resistance R36 with the source of field effect transistor MOS5
The diode D14 that pole is connected, P pole is connected with the cathode output end of diode rectifier U1, positive pole after resistance R35 with two
The P pole of pole pipe D14 is connected, polar capacitor C19, the P pole of minus earth is connected with the drain electrode of field effect transistor MOS5, N pole with
The diode D15 that the negative pole of polar capacitor C19 is connected, positive pole is connected with the N pole of diode D14, negative pole is after resistance R37
The polar capacitor C20 being connected with the N pole of diode D15, one end is connected with the positive pole of polar capacitor C20, the other end and three
The adjustable resistance R38 that the emitter stage of pole pipe VT8 is connected, negative pole is connected with the positive pole of amplifier P, positive pole is after resistance R39
The polar capacitor C21 being connected with the N pole of diode D14, one end is connected with the positive pole of polar capacitor C21, other end ground connection
Resistance R40, P pole be connected with the base stage of audion VT8, N pole negative pole with amplifier P after resistance R42 is connected two
Pole pipe D16, negative pole outfan with amplifier P after resistance R45 is connected, positive pole after resistance R43 with the N of diode D16
The polar capacitor C23 that pole is connected, and positive pole negative pole with polar capacitor C23 after resistance R44 is connected, negative pole is through resistance
The polar capacitor C22 composition that after R41, colelctor electrode with audion VT8 is connected；The negative pole of described polar capacitor C22 and diode
The N pole of D16 be connected after ground connection；The colelctor electrode of described audion VT8 is also connected with the N pole of diode D15；Described field effect
The grid of pipe MOS5 is connected with the adjustable end of adjustable resistance R38；The negative pole of described polar capacitor C23 is also with audion VT1's
Emitter stage is connected.
One many processing of circuit type LED dimming drive power the most according to claim 2, it is characterised in that described half-bridge
Drive circuit by field effect transistor MOS4, audion VT5, audion VT6, audion VT7, N pole after resistance R26 with audion
The diode D11 that the base stage of VT5 is connected, P pole is connected with the non-same polarity of transformator T secondary inductance coil L5, negative pole warp
The pole that after resistance R29, the colelctor electrode with audion VT5 is connected, positive pole is connected with the N pole of diode D11 after resistance R25
Property electric capacity C14, positive pole is connected with the N pole of diode D11, negative pole base stage with audion VT6 after resistance R27 is connected
Polar capacitor C15, positive pole colelctor electrode with audion VT6 after resistance R31 is connected, the colelctor electrode of negative pole and audion VT7
The polar capacitor C18 of ground connection after being connected, negative pole emitter stage with audion VT5 after adjustable resistance R30 is connected, positive pole with
The polar capacitor C17 that the emitter stage of audion VT7 is connected, negative pole grid with field effect transistor MOS4 after resistance R33 is connected
Connect, after polar capacitor C16, N electrode resistance R34 that positive pole negative pole with polar capacitor C14 after resistance R28 is connected with polarity electricity
Hold the diode D13 that positive pole is connected, P pole is connected of C16, and P pole with the base stage of the audion VT7 of field effect transistor MOS4
Voltage stabilizing two pole that positive pole with polar capacitor C16 is connected after resistance R32, N pole is connected with the source electrode of field effect transistor MOS4
Pipe D12 forms；The negative pole of described polar capacitor C15 also colelctor electrode with audion VT6 be connected after ground connection；Described audion
The colelctor electrode of VT6 also Same Name of Ends with transformator T secondary inductance coil L5 is connected, the transmitting of its emitter stage and audion VT5
Pole is connected；The base stage of described audion VT7 is also connected with the drain electrode of field effect transistor MOS4；The base stage of described audion VT7
N pole with Zener diode D12 is collectively forming the outfan of half-bridge drive circuit.
One many processing of circuit type LED dimming drive power the most according to claim 3, it is characterised in that described electric current
Regulation circuit by audion VT2, field effect transistor MOS2, N pole limit inductance coil L4 former with transformator T of the same name after resistance R21
The current collection of diode D2, the P pole that end is connected, be connected with the colelctor electrode of audion VT2 after P electrode resistance R2 and audion VT2
The N of the diode D3 that pole is connected, N pole is connected with the DIM pin of control chip U2 after resistance R3, one end and diode D3
The inductance L2 that pole is connected, the other end is connected with the DIM pin of control chip U2, positive pole is connected with the base stage of audion VT2
Connect, polar capacitor C4 that negative pole is connected with the VS pin of control chip U2 after resistance R4, one end is with polar capacitor C4 just
The resistance R5 that pole is connected, the other end is connected with the source electrode of field effect transistor MOS2, positive pole is connected with the negative pole of polar capacitor C4
Connect, polar capacitor C6 that negative pole is connected with the drain electrode of field effect transistor MOS2 after resistance R10, one end is with polar capacitor C6 just
The source electrode phase of resistance R6, the P pole that pole is connected, the other end is connected with the COM pin of control chip U2 and field effect transistor MOS2
Diode D5, the P pole that connection, N pole are connected with the drain electrode of field effect transistor MOS2 is connected with the emitter stage of audion VT2, N pole
The diode D4 being connected with the drain electrode of field effect transistor MOS2 after adjustable resistance R7, and positive pole is extremely connected with the N of diode D4
Connect, polar capacitor C5 composition that negative pole is sequentially connected with the drain electrode of field effect transistor MOS2 through resistance R8 after resistance R9；Described
The N pole of diode D4 is connected with the grid of field effect transistor MOS2；The negative pole of described polar capacitor C6 and the NC of control chip U2
Pin be connected after ground connection.
One many processing of circuit type LED dimming drive power the most according to claim 4, it is characterised in that described pulse
Trigger circuit by audion VT3, audion VT4, P pole CS pin with control chip U2 after resistance R14 is connected, N pole with
The diode D6 that the base stage of audion VT3 is connected, positive pole is connected with the base stage of audion VT3, negative pole and audion VT3
Be connected with the colelctor electrode of audion VT3 after polar capacitor C7, P electrode resistance R11 that colelctor electrode is connected, N pole is after resistance R13
The diode D7 being connected with the colelctor electrode of audion VT4, negative pole after adjustable resistance R18 with transformator T secondary inductance coil
The polar capacitor C8 that the non-same polarity of L5 is connected, positive pole is connected with the P pole of diode D7, one end is negative with polar capacitor C8's
The resistance R12 that pole is connected, the other end is connected with the P pole of diode D7, positive pole is connected with the GATE pin of control chip U2
Connect, the negative pole of polar capacitor C9, N pole that negative pole emitter stage with audion VT3 after resistance R15 is connected and polar capacitor C9
Be connected, the P pole diode D8 that the Same Name of Ends of limit inductance coil L4 former with transformator T is connected after resistance R19, positive pole and change
The polarity that Same Name of Ends is connected, negative pole is connected with the N pole of diode D8 after resistance R16 of depressor T former limit inductance coil L4
Electric capacity C11, and positive pole is connected with the Same Name of Ends of transformator T secondary inductance coil L5, negative pole after resistance R17 with audion
The polar capacitor C10 composition that the emitter stage of VT4 is connected；The negative pole of described polar capacitor C11 also with the emitter stage of audion VT4
It is connected；The negative pole of described polar capacitor C10 also positive pole with polar capacitor C8 is connected；The base stage of described audion VT4 with
The emitter stage of audion VT3 is connected；The positive pole of described polar capacitor C7 is also connected with the NC pin of control chip U2.
One many processing of circuit type LED dimming drive power the most according to claim 5, it is characterised in that described micro-place
Reason circuit is by field effect transistor MOS3, and P pole is connected with the source electrode of field effect transistor MOS3, N pole and transformator T and former limit inductance coil
The non-same polarity of L3 be connected after the Zener diode D9 of ground connection, the Same Name of Ends of one end and transformator T and former limit inductance coil L3
Be connected, adjustable resistance R24, N pole that the other end is connected with the drain electrode of field effect transistor MOS3 and transformator T and former limit inductor wire
The diode D10 that Same Name of Ends is connected, P pole is connected with the drain electrode of field effect transistor MOS2 after resistance R23 of circle L3, and negative
The polar capacitor that P pole is connected, positive pole is connected with the drain electrode of field effect transistor MOS3 after resistance R22 of pole and diode D10
C13 forms；The Same Name of Ends of the grid of described field effect transistor MOS3 limit former with transformator T inductance coil L4 is connected；Described polarity
The positive pole of electric capacity C13 is connected with the colelctor electrode of audion VT1.
One many processing of circuit type LED dimming drive power the most according to claim 6, it is characterised in that described control
Chip U2 is the integrated chip of FL7730.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601728.9A CN106231720A (en) | 2016-07-27 | 2016-07-27 | A kind of many processing of circuit type LED dimming drive power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601728.9A CN106231720A (en) | 2016-07-27 | 2016-07-27 | A kind of many processing of circuit type LED dimming drive power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071966A (en) * | 2017-03-13 | 2017-08-18 | 深圳盈特创智能科技有限公司 | A kind of LED light adjusting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071966A (en) * | 2017-03-13 | 2017-08-18 | 深圳盈特创智能科技有限公司 | A kind of LED light adjusting system |
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