CN106211436A - A kind of many processing of circuit type LED power supply of stable performance - Google Patents
A kind of many processing of circuit type LED power supply of stable performance Download PDFInfo
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- CN106211436A CN106211436A CN201610564998.7A CN201610564998A CN106211436A CN 106211436 A CN106211436 A CN 106211436A CN 201610564998 A CN201610564998 A CN 201610564998A CN 106211436 A CN106211436 A CN 106211436A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
The invention discloses many processing of circuit type LED power supply of a kind of stable performance, it is characterized in that, main by control chip U2, diode rectifier U1, transformator T, audion VT1, Zener diode D9, voltage-regulating circuit, constant pressure and flow drive circuit, relatively amplifying circuit, and the pulse current-limiting circuit composition being serially connected between the Same Name of Ends of constant pressure and flow drive circuit and transformator T former limit inductance coil L2.The high transient state of input voltage and electric current can be adjusted by the present invention, prevents the frequency of electric current from drift occur, makes voltage and current held stationary；And the present invention can carry out over-voltage and over-current regulation to output voltage and circuit, and wave energising pressure in output voltage and the unrestrained galvanization in output electric current can be suppressed, the intensity making output voltage and electric current improves more than 40%, thus effectively raises the load capacity of the present invention.
Description
Technical field
The present invention relates to electronic applications, specifically, be many processing of circuit type LED electricity consumption of a kind of stable performance
Source.
Background technology
Now with the improving constantly of living standard of people, the requirement to the landscaping of life is more and more higher, people
For the living environment made oneself beautiful, just use the LED with various light sources color that indoor are being beautified.So
And, existing LED power supply is easily occurred by extraneous Electromagnetic Interference that output voltage and electric current are unstable, cause light-operated
The brightness of LED is unstable, has had a strong impact on the service life of LED；And existing LED power supply there is also load
The problem of ability.
Stable voltage and current can be exported therefore it provides a kind of, the LED power supply of load capacity can be improved again
It it is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED electric power output voltage of the prior art and electric current unstable, and
And the defect of load capacity difference, it is provided that many processing of circuit type LED power supply of a kind of stable performance.
The present invention is achieved through the following technical solutions: many processing of circuit type LED power supply of a kind of stable performance,
Main by control chip U2, diode rectifier U1, transformator T, audion VT1, it is serially connected in the positive pole of diode rectifier U1
Comparison amplifying circuit between the emitter stage of outfan and audion VT1, P pole after resistance R2 with the base stage phase of audion VT1
The positive pole of the Zener diode D1 that connection, N pole are connected with the VCC pin of control chip U2, positive pole and diode rectifier U1
The polar capacitor C1 of ground connection, positive pole warp after outfan is connected, negative pole is connected with the cathode output end of diode rectifier U1
After resistance R1 the cathode output end with diode rectifier U1 be connected, polar capacitor C2, the P pole of minus earth and control chip
The diode D2 that the VREF pin of U2 is connected, N pole is connected with the RC pin of control chip U2 after resistance R3, positive pole and change
The Same Name of Ends of depressor T secondary inductance coil L3 is connected, negative pole is connected with the non-same polarity of transformator T secondary inductance coil L3
Polar capacitor C11, the P pole of rear ground connection is connected with the positive pole of polar capacitor C11, N pole and transformator T secondary inductance coil L3
Non-same polarity is collectively forming the Zener diode D9 of outfan, the non-same polarity phase of limit former with transformator T, one end inductance coil L2
Connect, the resistance R14 of other end ground connection, be connected with the COMP pin of control chip U2 and VFB pin and IS pin respectively
Voltage-regulating circuit, respectively with the colelctor electrode of audion VT1 and the OUT pin of control chip U2 and voltage-regulating circuit phase
The constant pressure and flow drive circuit connected, and it is serially connected in the same of constant pressure and flow drive circuit limit former with transformator T inductance coil L2
Pulse current-limiting circuit composition between name end；Described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1's is same
Name end is connected with non-same polarity；The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin.
The described amplifying circuit that compares by audion VT8, audion VT9, field effect transistor MOS2, positive pole after resistance R29 with
The polar capacitor C16 that the grid of field effect transistor MOS2 is connected, negative pole is connected with the cathode output end of diode rectifier U1,
The polarity electricity that negative pole is connected with the base stage of audion VT8, positive pole positive pole with polar capacitor C16 after resistance R28 is connected
Holding C19, positive pole positive pole with polar capacitor C16 after resistance R30 is connected, the polar capacitor C17 of minus earth, and positive pole is through electricity
Be connected with the drain electrode of field effect transistor MOS2 after resistance R31, polar capacitor C18, the P pole of minus earth after resistance R33 with three poles
The diode D13 that the colelctor electrode of pipe VT8 is connected, N pole is connected with the source electrode of field effect transistor MOS2, one end and audion VT8
Emitter stage be connected, the other end be connected with the colelctor electrode of audion VT9 after adjustable resistance R35, P electrode resistance R32 of ground connection
Be connected with the drain electrode of field effect transistor MOS2 afterwards, diode D14 that N pole is connected with the adjustable end of adjustable resistance R35, negative pole with
The polar capacitor C20, N that the base stage of audion VT9 is connected, positive pole emitter stage with audion VT8 after resistance R34 is connected
Pole emitter stage with audion VT9 after resistance R37 is connected, P pole after adjustable resistance R36 with the colelctor electrode of audion VT8
The diode D16 being connected, and P pole is connected with the colelctor electrode of audion VT8, N pole is connected with the emitter stage of audion VT1
The Zener diode D15 composition connect.
Described pulse current-limiting circuit by audion VT6, audion VT7, positive pole after resistance R20 with the sending out of audion VT6
Polar capacitor C12, the P pole that emitter-base bandgap grading is connected, negative pole is connected with constant pressure and flow drive circuit after resistance R21 with audion
The base stage of VT6 is connected, the diode D11 of N pole ground connection, and negative pole emitter stage with audion VT7 after adjustable resistance R23 is connected
Connect, polar capacitor C13 that positive pole is connected with the P pole of diode D11, negative pole is connected with the colelctor electrode of audion VT7, positive pole
Polar capacitor C14, the P pole being connected with the N pole of diode D11 after resistance R22 is connected with the colelctor electrode of audion VT6, N
The diode D10 that pole emitter stage with audion VT7 after resistance R24 is connected, negative pole is connected with the base stage of audion VT7
Connect, polar capacitor C15, P pole that positive pole is connected with the N of diode D10 after resistance R25 with the positive pole phase of polar capacitor C15
Connect, diode D12 that N pole colelctor electrode with audion VT7 after resistance R26 is connected, and one end is with diode D12's
The adjustable resistance R27 composition that N pole is connected, the other end is connected with the colelctor electrode of audion VT7；The collection of described audion VT7
Electrode ground connection；The Same Name of Ends of limit former with transformator T, the P pole inductance coil L2 of described diode D12 is connected.
Further, described voltage-regulating circuit by audion VT2, audion VT3, P pole after resistance R4 with control core
The diode D3 that the COMP pin of sheet U2 is connected, N pole colelctor electrode with audion VT2 after resistance R is connected, positive pole is through electricity
Be connected with the VFB pin of control chip U2 after resistance R6, the emitter stage of polar capacitor C3, the N pole of minus earth and audion VT3
Be connected, diode D4 that P pole emitter stage with audion VT2 after resistance R8 is connected, the P pole phase of negative pole and diode D4
The polar capacitor C4 that connection, positive pole are connected with the base stage of audion VT2, one end is connected with the positive pole of polar capacitor C3, separately
The resistance R7 that one end is connected with the N pole of diode D4, positive pole is connected with the emitter stage of audion VT2, negative pole is through resistance R9
Polar capacitor C5, the N pole that emitter stage with audion VT3 is connected afterwards is connected with the IS pin of control chip U2, P pole and three
The diode D5 that the emitter stage of pole pipe VT3 is connected, and positive pole base stage with audion VT3 after adjustable resistance R10 is connected
Connect, polar capacitor C6 that negative pole is connected with constant pressure and flow drive circuit composition；The base stage of described audion VT3 and control chip
The RC pin of U2 is connected, its colelctor electrode is connected with the positive pole of polar capacitor C3.
Described constant pressure and flow drive circuit is by audion VT4, audion VT5, field effect transistor MOS1, and N pole is after resistance R19
Be connected with the colelctor electrode of audion VT4, diode D8 that P pole negative pole with polar capacitor C12 after resistance R18 is connected,
The adjustable resistance R17 that one end is connected with the P pole of diode D8, the other end is connected with the drain electrode of field effect transistor MOS1, negative pole
Be connected with the emitter stage of audion VT5, polar capacitor C7 that positive pole is connected with the OUT pin of control chip U2, negative pole with
The polar capacitor C8 that the negative pole of polar capacitor C12 is connected, positive pole emitter stage with audion VT5 after resistance R16 is connected,
The diode that N pole is connected with the grid of field effect transistor MOS1, P pole emitter stage with audion VT5 after resistance R15 is connected
D7, polar capacitor C9, the N pole that negative pole is connected with the drain electrode of field effect transistor MOS1, positive pole is connected with the base stage of audion VT5
The diode D6 that colelctor electrode with audion VT5 is connected after resistance R13, P pole is connected with the colelctor electrode of audion VT1,
Negative pole source electrode with field effect transistor MOS1 after resistance R12 is connected, positive pole P with diode D6 after resistance R11 is extremely connected
The polar capacitor C10 connect, and one end is connected with the positive pole of polar capacitor C10, the other end and transformator T former limit inductance coil
The inductance L4 composition that the Same Name of Ends of L1 is connected；The non-same polarity of described transformator T former limit inductance coil L1 also with polar capacitor
The positive pole of C10 is connected, its Same Name of Ends is connected with the source electrode of field effect transistor MOS1；The grounded collector of described audion VT4,
Its base stage is connected with the negative pole of polar capacitor C6, its emitter stage is connected with the negative pole of polar capacitor C7.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated chip of 3S44 to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the high transient state of input voltage and electric 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 and current；And the present invention can be to output
Voltage and circuit carry out over-voltage and over-current regulation, and can carry out wave energising pressure in output voltage and the unrestrained galvanization in output electric current
Suppression, makes the intensity of output voltage and electric current improve more than 40%, thus effectively raises the load capacity of the present invention.
(2) present invention can effectively improve resistance to pressure and the dynamic range of input voltage, and can be by the centre zero of electric current
Point skew controls within 0.3nA, thus improves load capacity of the present invention.
(3) high surge current produced when powering up can be suppressed by the present invention, and can be by the surge current of output electric current
Being reduced in the range of permission, even if within the inrush current value of electric current is maintained at 0.5～1nA, thus it is defeated to improve the present invention
Go out the stability of voltage and current.
(4) the control chip U2 of the present invention uses the integrated chip of 3S44 to realize, and this chip is tied mutually with external circuit
Close and effectively raise output voltage of the present invention and the stability of electric current and reliability.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the pulse current-limiting circuit of the present invention.
Fig. 3 is the electrical block diagram of the comparison amplifying 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, audion VT1, string
The comparison amplifying circuit being connected between the cathode output end of diode rectifier U1 and the emitter stage of audion VT1, P pole is through resistance
The Zener diode D1 that after R2, the base stage with audion VT1 is connected, N pole is connected with the VCC pin of control chip U2, positive pole
Be connected with the cathode output end of diode rectifier U1, negative pole is connected with the cathode output end of diode rectifier U1 and is followed by
The polar capacitor C1 on ground, positive pole cathode output end with diode rectifier U1 after resistance R1 is connected, the pole of minus earth
Property electric capacity C2, P pole is connected with the VREF pin of control chip U2, N pole after resistance R3 with the RC pin phase of control chip U2
The diode D2 connected, positive pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3, negative pole is electric with transformator T secondary
The non-same polarity of sense coil L3 be connected after polar capacitor C11, the P pole of ground connection be connected with the positive pole of polar capacitor C11, N pole
With the Zener diode D9 that the non-same polarity of transformator T secondary inductance coil L3 is collectively forming outfan, one end is former with transformator T
The non-same polarity of limit inductance coil L2 is connected, the resistance R14 of other end ground connection, respectively with the COMP pin of control chip U2 and
The voltage-regulating circuit that VFB pin and IS pin are connected, respectively with the colelctor electrode of audion VT1 and control chip U2
The constant pressure and flow drive circuit that OUT pin and voltage-regulating circuit are connected, and be serially connected in constant pressure and flow drive circuit with
Pulse current-limiting circuit composition between the Same Name of Ends of transformator T former limit inductance coil L2.
Same Name of Ends and the non-same polarity of described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1 are connected
Connect；The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin；The two of described diode rectifier U1
Individual input is collectively forming the input of the present invention and is connected with external power source.For the practical effect of the present invention, institute
Stating control chip U2 the most preferentially uses the integrated chip of 3S44 to realize.
Further, described voltage-regulating circuit by audion VT2, audion VT3, resistance R4, resistance R5, resistance R6,
Resistance R7, resistance R8, resistance R9, adjustable resistance R10, polar capacitor C3, polar capacitor C4, polar capacitor C5, polar capacitor C6,
Diode D3, diode D4, and diode D5 form.
During connection, the P pole of diode D3 COMP pin with control chip U2 after resistance R4 is connected, its N pole then warp
After resistance R, the colelctor electrode with audion VT2 is connected.The positive pole of polar capacitor C3 after resistance R6 with the VFB of control chip U2
Pin is connected, its negative pole then ground connection.The N pole of diode D4 is connected with the emitter stage of audion VT3, its P pole is then through resistance
After R8, the emitter stage with audion VT2 is connected.
Wherein, the negative pole of polar capacitor C4 be connected with the P pole of diode D4, its positive pole then with the base stage of audion VT2
It is connected.One end of resistance R7 is connected with the positive pole of polar capacitor C3, its other end is then connected with the N pole of diode D4.
The positive pole of polar capacitor C5 is connected with the emitter stage of audion VT2, its negative pole then after resistance R9 with the transmitting of audion VT3
Pole is connected.
Meanwhile, the N pole of diode D5 be connected with the IS pin of control chip U2, its P pole then with the transmitting of audion VT3
Pole is connected.The positive pole of polar capacitor C6 base stage with audion VT3 after adjustable resistance R10 is connected, its negative pole then with perseverance
Pressure constant-current drive circuit is connected.The base stage of described audion VT3 is connected with the RC pin of control chip U2, its colelctor electrode with
The positive pole of polar capacitor C3 is connected.
Further, described constant pressure and flow drive circuit is by audion VT4, audion VT5, field effect transistor MOS1, electricity
Resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, adjustable resistance R17, resistance R18, resistance R19, pole
Property electric capacity C7, polar capacitor C8, polar capacitor C9, polar capacitor C10, diode D6, diode D7, diode D8, Yi Ji electricity
Sense L4 composition.
During connection, the N pole of diode D8 colelctor electrode with audion VT4 after resistance R19 is connected, its P pole is then through electricity
It is connected with the negative pole of polar capacitor C12 after resistance R18.One end of adjustable resistance R17 is connected with the P pole of diode D8, it is another
One end is then connected with the drain electrode of field effect transistor MOS1.The negative pole of polar capacitor C7 is connected with the emitter stage of audion VT5, it
Positive pole is then connected with the OUT pin of control chip U2.
Wherein, the negative pole of polar capacitor C8 be connected with the negative pole of polar capacitor C12, its positive pole then after resistance R16 with
The emitter stage of audion VT5 is connected.Diode D7N pole be connected with the grid of field effect transistor MOS1, its P pole is then through resistance
After R15, the emitter stage with audion VT5 is connected.The negative pole of polar capacitor C9 is connected with the drain electrode of field effect transistor MOS1, it
Positive pole then base stage with audion VT5 is connected.
Meanwhile, the N pole of diode D6 colelctor electrode with audion VT5 after resistance R13 be connected, its P pole then with three poles
The colelctor electrode of pipe VT1 is connected.The negative pole of polar capacitor C10 source electrode with field effect transistor MOS1 after resistance R12 is connected, it
Positive pole then after resistance R11 P pole with diode D6 be connected.One end of inductance L4 is connected with the positive pole of polar capacitor C10,
The Same Name of Ends of its other end then limit inductance coil L1 former with transformator T is connected.
The non-same polarity of described transformator T former limit inductance coil L1 is also connected with the positive pole of polar capacitor C10, it is of the same name
End is connected with the source electrode of field effect transistor MOS1；The grounded collector of described audion VT4, its base stage are negative with polar capacitor C6's
Pole is connected, its emitter stage is connected with the negative pole of polar capacitor C7.
As in figure 2 it is shown, described pulse current-limiting circuit is by audion VT6, audion VT7, resistance R20, resistance R21, resistance
R22, adjustable resistance R23, resistance R24, resistance R25, resistance R26, adjustable resistance R27, polar capacitor C12, polar capacitor C13,
Polar capacitor C14, polar capacitor C15, diode D10, diode D11, and diode D12 form.
During connection, the positive pole of polar capacitor C12 emitter stage with audion VT6 after resistance R20 is connected, its negative pole then
It is connected with constant pressure and flow drive circuit.The P pole of diode D11 base stage with audion VT6 after resistance R21 is connected, its N
Pole then ground connection.The negative pole of polar capacitor C13 emitter stage with audion VT7 after adjustable resistance R23 is connected, its positive pole then with
The P pole of diode D11 is connected.
Wherein, the negative pole of polar capacitor C14 be connected with the colelctor electrode of audion VT7, its positive pole then after resistance R22 with
The N pole of diode D11 is connected.The P pole of diode D10 is connected with the colelctor electrode of audion VT6, its N pole is then through resistance R24
Emitter stage with audion VT7 is connected afterwards.The negative pole of polar capacitor C15 is connected with the base stage of audion VT7, its positive pole then
It is connected with the N of diode D10.
Meanwhile, the P pole of diode D12 positive pole with polar capacitor C15 after resistance R25 is connected, its N pole is then through resistance
After R26, the colelctor electrode with audion VT7 is connected.One end of adjustable resistance R27 is connected with the N pole of diode D12, its another
End then colelctor electrode with audion VT7 is connected.The grounded collector of described audion VT7；The P pole of described diode D12 with
The Same Name of Ends of transformator T former limit inductance coil L2 is connected.
As it is shown on figure 3, the described amplifying circuit that compares is by audion VT8, audion VT9, field effect transistor MOS2, resistance R28,
Resistance R29, resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, adjustable resistance R35, adjustable resistance R36, resistance
R37, polar capacitor C16, polar capacitor C17, polar capacitor C18 polar capacitor C19, polar capacitor C20, diode D13, two poles
Pipe D14, Zener diode D15, and diode D16 form.
During connection, the positive pole of polar capacitor C16 grid with field effect transistor MOS2 after resistance R29 is connected, its negative pole
Then the cathode output end with diode rectifier U1 is connected.The negative pole of polar capacitor C19 is connected with the base stage of audion VT8
Connect, its positive pole then after resistance R28 positive pole with polar capacitor C16 be connected.The positive pole of polar capacitor C17 is after resistance R30
Be connected with the positive pole of polar capacitor C16, its negative pole then ground connection.
Wherein, the drain electrode with field effect transistor MOS2 after resistance R31 of the positive pole of polar capacitor C18 be connected, its negative pole then
Ground connection.The P pole of diode D13 colelctor electrode with audion VT8 after resistance R33 is connected, its N pole then with field effect transistor MOS2
Source electrode be connected.One end of adjustable resistance R35 is connected with the emitter stage of audion VT8, its other end then with audion VT9
Colelctor electrode be connected after ground connection.Be connected with the drain electrode of field effect transistor MOS2 after P electrode resistance R32 of diode D14, its N pole
Then it is connected with the adjustable end of adjustable resistance R35.
Meanwhile, the negative pole of polar capacitor C20 be connected with the base stage of audion VT9, its positive pole then after resistance R34 with three
The emitter stage of pole pipe VT8 is connected.The N pole of diode D16 emitter stage with audion VT9 after resistance R37 is connected, its P
Pole then after adjustable resistance R36 colelctor electrode with audion VT8 be connected.The P pole of Zener diode D15 is with audion VT8's
Colelctor electrode is connected, its N pole then emitter stage with audion VT1 is connected.
During operation, the high transient state of input voltage and electric current can be adjusted by the present invention, prevents the frequency of electric current from drift occur
Move, make voltage and current held stationary, ensure that the present invention can export stable voltage and current；And the present invention can be right
Output voltage and circuit carry out over-voltage and over-current regulation, and can be to wave energising pressure in output voltage and the unrestrained galvanization in output electric current
Suppress, make the intensity of output voltage and electric current improve more than 40%, thus effectively raise the load energy of the present invention
Power.The present invention can effectively improve resistance to pressure and the dynamic range of input voltage, and can be by the middle zero migration control of electric current
System is within 0.3nA, thus improves load capacity of the present invention.
Meanwhile, the high surge current produced when powering up can be suppressed by the present invention, and can be by the surge electricity of output electric current
Stream is reduced to, in the range of permission, even if within the inrush current value of electric current is maintained at 0.5～1nA, thus improve the present invention
Output voltage and the stability of electric current.The control chip U2 of the present invention uses the integrated chip of 3S44 to realize, and this chip with
External circuit combines and effectively raises stability and the reliability of output voltage of the present invention and electric current.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. many processing of circuit type LED power supply of a stable performance, it is characterised in that mainly by control chip U2, two
Pole pipe commutator U1, transformator T, audion VT1, be serially connected in the cathode output end of diode rectifier U1 with audion VT1's
Comparison amplifying circuit between emitter stage, P pole base stage with audion VT1 after resistance R2 is connected, N pole and control chip U2
The Zener diode D1 that is connected of VCC pin, positive pole is connected with the cathode output end of diode rectifier U1, negative pole and two
The cathode output end of pole pipe commutator U1 be connected after the polar capacitor C1 of ground connection, positive pole after resistance R1 with diode rectifier
The cathode output end of U1 is connected, polar capacitor C2, the P pole of minus earth is connected with the VREF pin of control chip U2, N pole
The diode D2 being connected with the RC pin of control chip U2 after resistance R3, positive pole is with transformator T secondary inductance coil L3's
The polar capacitor C11, P of ground connection after Same Name of Ends is connected, negative pole is connected with the non-same polarity of transformator T secondary inductance coil L3
Pole is connected with the positive pole of polar capacitor C11, N pole is collectively forming output with the non-same polarity of transformator T secondary inductance coil L3
The Zener diode D9 of end, the non-same polarity of limit former with transformator T, one end inductance coil L2 is connected, the resistance of other end ground connection
R14, the voltage-regulating circuit being connected with the COMP pin of control chip U2 and VFB pin and IS pin respectively, respectively with
The constant pressure and flow that the colelctor electrode of audion VT1 is connected with OUT pin and the voltage-regulating circuit of control chip U2 drives electricity
Road, and the pulse current limliting electricity being serially connected between the Same Name of Ends of constant pressure and flow drive circuit and transformator T former limit inductance coil L2
Road forms；Same Name of Ends and the non-same polarity of described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1 are connected；
The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin.
Many processing of circuit type LED power supply of a kind of stable performance the most according to claim 1, it is characterised in that
The described amplifying circuit that compares by audion VT8, audion VT9, field effect transistor MOS2, positive pole after resistance R29 with field effect transistor
The polar capacitor C16 that the grid of MOS2 is connected, negative pole is connected with the cathode output end of diode rectifier U1, negative pole and three
The polar capacitor C19 that the base stage of pole pipe VT8 is connected, positive pole positive pole with polar capacitor C16 after resistance R28 is connected, just
Pole positive pole with polar capacitor C16 after resistance R30 is connected, the polar capacitor C17 of minus earth, and positive pole is after resistance R31
Be connected with the drain electrode of field effect transistor MOS2, polar capacitor C18, the P pole of minus earth after resistance R33 with audion VT8's
The emitter stage of the diode D13 that colelctor electrode is connected, N pole is connected with the source electrode of field effect transistor MOS2, one end and audion VT8
Be connected, the other end be connected with the colelctor electrode of audion VT9 after ground connection adjustable resistance R35, P electrode resistance R32 after with field imitate
Should the diode D14 that drain electrode is connected, N pole is connected with the adjustable end of adjustable resistance R35 of pipe MOS2, negative pole and audion
Polar capacitor C20, the N pole that the base stage of VT9 is connected, positive pole emitter stage with audion VT8 after resistance R34 is connected is through electricity
Be connected with the emitter stage of audion VT9 after resistance R37, P pole colelctor electrode with audion VT8 after adjustable resistance R36 is connected
Diode D16, and P pole is connected with the colelctor electrode of audion VT8, N pole is steady with what the emitter stage of audion VT1 was connected
Pressure diode D15 composition.
Many processing of circuit type LED power supply of a kind of stable performance the most according to claim 2, it is characterised in that
Described pulse current-limiting circuit is by audion VT6, and audion VT7, positive pole emitter stage with audion VT6 after resistance R20 is connected
Connect, polar capacitor C12, P pole that negative pole is connected with constant pressure and flow drive circuit after resistance R21 with the base stage of audion VT6
Be connected, the diode D11 of N pole ground connection, negative pole emitter stage with audion VT7 after adjustable resistance R23 is connected, positive pole with
The polar capacitor C13 that the P pole of diode D11 is connected, negative pole is connected with the colelctor electrode of audion VT7, positive pole is through resistance R22
Polar capacitor C14, the P pole being connected with the N pole of diode D11 afterwards is connected with the colelctor electrode of audion VT6, N pole is through resistance
The diode D10 that after R24, emitter stage with audion VT7 is connected, negative pole is connected with the base stage of audion VT7, positive pole with
Polar capacitor C15, the P pole that the N of diode D10 is connected positive pole with polar capacitor C15 after resistance R25 is connected, N pole warp
The diode D12 that after resistance R26, colelctor electrode with audion VT7 is connected, and one end is connected with the N pole of diode D12,
The adjustable resistance R27 composition that the other end is connected with the colelctor electrode of audion VT7；The grounded collector of described audion VT7；Institute
The Same Name of Ends of limit former with transformator T, the P pole inductance coil L2 stating diode D12 is connected.
Many processing of circuit type LED power supply of a kind of stable performance the most according to claim 3, it is characterised in that
Described voltage-regulating circuit is by audion VT2, and audion VT3, P pole COMP pin with control chip U2 after resistance R4 is connected
Connect, diode D3 that N pole colelctor electrode with audion VT2 after resistance R is connected, positive pole after resistance R6 with control chip U2
VFB pin be connected, polar capacitor C3, the N pole of minus earth is connected with the emitter stage of audion VT3, P pole is through resistance R8
The diode D4 that emitter stage with audion VT2 is connected afterwards, negative pole is connected with the P pole of diode D4, positive pole and audion
The polar capacitor C4 that the base stage of VT2 is connected, one end is connected with the positive pole of polar capacitor C3, the N of the other end and diode D4
The resistance R7 that pole is connected, positive pole is connected with the emitter stage of audion VT2, negative pole after resistance R9 with audion VT3 send out
Polar capacitor C5, the N pole that emitter-base bandgap grading is connected is connected with the IS pin of control chip U2, the emitter stage phase of P pole and audion VT3
The diode D5 connected, and positive pole base stage with audion VT3 after adjustable resistance R10 is connected, negative pole and constant pressure and flow
The polar capacitor C6 composition that drive circuit is connected；The base stage of described audion VT3 is connected with the RC pin of control chip U2,
Its colelctor electrode is connected with the positive pole of polar capacitor C3.
Many processing of circuit type LED power supply of a kind of stable performance the most according to claim 4, it is characterised in that
Described constant pressure and flow drive circuit by audion VT4, audion VT5, field effect transistor MOS1, N pole after resistance R19 with audion
The diode D8 that the colelctor electrode of VT4 is connected, P pole negative pole with polar capacitor C12 after resistance R18 is connected, one end and two
The adjustable resistance R17 that the P pole of pole pipe D8 is connected, the other end is connected with the drain electrode of field effect transistor MOS1, negative pole and audion
The polar capacitor C7 that the emitter stage of VT5 is connected, positive pole is connected with the OUT pin of control chip U2, negative pole and polar capacitor
The negative pole of C12 is connected, positive pole emitter stage with audion VT5 after resistance R16 is connected polar capacitor C8, N pole and field
The diode D7 that the grid of effect pipe MOS1 is connected, P pole emitter stage with audion VT5 after resistance R15 is connected, negative pole
Be connected with the drain electrode of field effect transistor MOS1, polar capacitor C9, N pole that positive pole is connected with the base stage of audion VT5 is through resistance
The diode D6 that after R13, the colelctor electrode with audion VT5 is connected, P pole is connected with the colelctor electrode of audion VT1, negative pole warp
The pole that after resistance R12, the source electrode with field effect transistor MOS1 is connected, positive pole is connected with the P pole of diode D6 after resistance R11
Property electric capacity C10, and one end is connected with the positive pole of polar capacitor C10, other end limit former with transformator T inductance coil L1 same
The inductance L4 composition that name end is connected；The non-same polarity of described transformator T former limit inductance coil L1 is also with polar capacitor C10 just
Pole is connected, its Same Name of Ends is connected with the source electrode of field effect transistor MOS1；The grounded collector of described audion VT4, its base stage
Be connected with the negative pole of polar capacitor C6, its emitter stage is connected with the negative pole of polar capacitor C7.
Many processing of circuit type LED power supply of a kind of stable performance the most according to claim 5, it is characterised in that
Described control chip U2 is the integrated chip of 3S44.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610564998.7A CN106211436A (en) | 2016-07-18 | 2016-07-18 | A kind of many processing of circuit type LED power supply of stable performance |
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| CN201610564998.7A CN106211436A (en) | 2016-07-18 | 2016-07-18 | A kind of many processing of circuit type LED power supply of stable performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246889A (en) * | 2018-09-26 | 2019-01-18 | 华域视觉科技(上海)有限公司 | The LED drive circuit and its driving method and storage medium of DC-DC and linear combination |
-
2016
- 2016-07-18 CN CN201610564998.7A patent/CN106211436A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246889A (en) * | 2018-09-26 | 2019-01-18 | 华域视觉科技(上海)有限公司 | The LED drive circuit and its driving method and storage medium of DC-DC and linear combination |
| CN109246889B (en) * | 2018-09-26 | 2024-03-05 | 华域视觉科技(上海)有限公司 | DC-DC and linear combination LED driving circuit, driving method thereof and storage medium |
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