CN106061025A - LED digital flat soft light lamp power source having stable performance - Google Patents
LED digital flat soft light lamp power source having stable performance Download PDFInfo
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- CN106061025A CN106061025A CN201610551094.0A CN201610551094A CN106061025A CN 106061025 A CN106061025 A CN 106061025A CN 201610551094 A CN201610551094 A CN 201610551094A CN 106061025 A CN106061025 A CN 106061025A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses an LED digital flat soft light lamp power source having stable performance. The LED digital flat soft light lamp power source is characterized by mainly comprising a voltage stabilizing chip U2, a transformer T, a diode rectifier U1, a triode VT1, a polar capacitor C1, a polar capacitor C2, an overvoltage overcurrent protection circuit, a voltage adjusting circuit, a surge current limit circuit, an adjustable constant current driving circuit and a triode triggering circuit. According to the LED digital flat soft light lamp power source, an instant high voltage can be eliminated or inhibited, back-end electronic components and LED digital flat soft light lamps can be effectively prevented from being damaged by high voltages, adjustment on a current and a voltage can be further realized, so an output voltage and an output current are made to be consistent with a rated voltage and a rated current required by the LED digital flat soft light lamps, and stable voltage and current output is guaranteed.
Description
Technical field
The present invention relates to electronic applications, specifically, be the LED digitizer tablet soft light power supply of a kind of stable performance.
Background technology
LED digitizer tablet soft light, is that one utilizes low-power LED to form face light, and combines high transmission rate softbox
The new generation of green environmental protection light source formed.It is soft, uniform that LED digitizer tablet soft light has illumination, without infrared ray, ultraviolet
Line, surface brightness is less than three-color fluorescent lamp, free from glare, the characteristic such as the most dazzling.LED digitizer tablet soft light is because of its institute at present
The above-mentioned characteristic that has and be widely used in specialty shooting and photography as light filling.But, existing LED digitizer tablet sheen
There is output voltage and the problem of electric current instability in lamp power supply, causes the brightness of LED digitizer tablet soft light flicker, light occur
According to uneven, shooting and the quality of photography are had a strong impact on.
Therefore it provides a kind of LED digitizer tablet soft light power supply that can export stable voltage and current is when business
Anxious.
Summary of the invention
It is an object of the invention to overcome LED digitizer tablet soft light power supply of the prior art exist output voltage and
The defect that electric current is unstable, it is provided that the LED digitizer tablet soft light power supply of a kind of stable performance.
The present invention is achieved through the following technical solutions: the LED digitizer tablet soft light power supply of a kind of stable performance, main
Will be by voltage stabilizing chip U2, transformator T, diode rectifier U1, audion VT1, the negative pole being serially connected in diode rectifier U1 is defeated
Go out the cathode output end of the ICLC between end and the base stage of audion VT1, positive pole and diode rectifier U1
Be connected, negative pole be connected with diode rectifier U1 cathode output end after the polar capacitor C1 of ground connection, positive pole is sequentially through resistance
The polarity electricity that after R1 and resistance R2, the colelctor electrode with audion VT1 is connected, negative pole is connected with the GND pin of voltage stabilizing chip U2
Hold C2, the over-voltage over-current protection circuit being connected with voltage stabilizing chip U2, be serially connected in the cathode output end of diode rectifier U1 with
Voltage-regulating circuit between over-voltage over-current protection circuit, the adjustable constant-flow being connected with over-voltage over-current protection circuit drives electricity
Road, and the audion triggering circuit composition being serially connected between over-voltage over-current protection circuit and adjustable constant-flow drive circuit；Described
The emitter stage of audion VT1 is connected with the VIN pin of voltage stabilizing chip U2；The Same Name of Ends of described transformator T secondary inductance coil
Be connected with one of them input of diode rectifier U1, another input of its non-same polarity and diode rectifier U1
End is connected；The Same Name of Ends of described transformator T former limit inductance coil and non-same polarity are collectively forming the input of this power supply；Described
The outfan of adjustable constant-flow drive circuit is as the outfan of this power supply.
Described audion triggers circuit by audion VT8, audion VT9, positive pole after resistance R30 with audion VT8's
The polar capacitor C16 that base stage is connected, negative pole is connected with over-voltage over-current protection circuit, negative pole is electric with polarity after resistance R29
Hold polar capacitor C17, the N pole that positive pole is connected, positive pole emitter stage with audion VT8 after resistance R33 is connected of C16 with
The diode D11 that the positive pole of polar capacitor C16 is connected, P pole colelctor electrode with audion VT8 after resistance R31 is connected, one
End is connected with the colelctor electrode of audion VT8, adjustable resistance R34 that the other end is connected with the base stage of audion VT9, negative pole and
Polar capacitor C18, the P pole that the colelctor electrode of audion VT9 is connected, positive pole is connected with the colelctor electrode of audion VT8 and three poles
The diode D13 that the colelctor electrode of pipe VT9 is connected, N pole is connected with adjustable constant-flow drive circuit, positive pole is through adjustable resistance R36
Be connected with the N pole of diode D13 afterwards, the polar capacitor C19 of minus earth, one end is connected with the emitter stage of audion VT9,
The resistance R35 that the other end is connected with the adjustable end of adjustable resistance R36, and P pole is connected with the emitter stage of audion VT9, N
The diode D12 composition that pole positive pole with polar capacitor C17 after resistance R32 is connected；The negative pole of described polar capacitor C17 connects
Ground；The N pole ground connection of described diode D12.
Described ICLC by amplifier P2, audion VT7, positive pole is connected with the base stage of audion VT7,
Polar capacitor C12, the N pole that negative pole cathode output end with diode rectifier U1 after resistance R20 is connected is after resistance R22
Be connected with the emitter stage of audion VT7, diode D8 that P pole negative pole with polar capacitor C12 after resistance R21 is connected,
Negative pole polar capacitor that N pole is connected, positive pole is connected with the emitter stage of audion VT7 with diode D8 after resistance R24
C13, P pole negative pole with polar capacitor C13 after resistance R23 is connected, N pole is connected with the colelctor electrode of audion VT7 and is followed by
The diode D9 on ground, positive pole is sequentially connected through resistance R27 outfan with amplifier P2 after resistance R28, negative pole is through resistance
Polar capacitor C14, the N pole that after R26, negative pole with amplifier P2 is connected outfan with amplifier P2 after inductance L2 is connected
Connect, diode D10 that P pole is connected with the positive pole of amplifier P2, and negative pole is connected with the outfan of amplifier P2, positive pole
The polar capacitor C15 composition that positive pole with amplifier P2 is connected after resistance R25；The minus earth of described polar capacitor C14；
The positive pole of described amplifier P2 is connected with the negative pole of polar capacitor C13, defeated as ICLC of its outfan
Go out end and be connected with the base stage of audion VT1.
Described voltage-regulating circuit by amplifier P1, audion VT5, audion VT6, P pole after resistance R13 with amplifier
The diode D5 that the positive pole of P1 is connected, N pole is connected with the cathode output end of diode rectifier U1, positive pole and amplifier P1
Negative pole be connected, be connected with the negative pole of polar capacitor C8 after polar capacitor C8, P electrode resistance R14 of minus earth, N pole warp
The diode D6 that after resistance R18, colelctor electrode with audion VT5 is connected, one end is connected with the N pole of diode D6, the other end
The adjustable resistance R19 of ground connection after being connected with the colelctor electrode of audion VT6, negative pole is connected with the base stage of audion VT6, positive pole
Polar capacitor C11, the P pole being connected with the colelctor electrode of audion VT5 is connected with the emitter stage of audion VT6, N pole is through resistance
The Zener diode D7 that after R17, emitter stage with audion VT5 is connected, negative pole is connected with the outfan of amplifier P1, just
The polar capacitor C10 that pole is connected with the N pole of Zener diode D7 after adjustable resistance R16, and positive pole after resistance R12 with
The polar capacitor C9 group that the P pole of diode D5 is connected, negative pole is connected with the adjustable end of adjustable resistance R16 after resistance R15
Become；The base stage of described audion VT5 is connected with the outfan of amplifier P1；The N pole of described Zener diode D7 is as voltage
Adjust the outfan of circuit and be connected with over-voltage over-current protection circuit.
Described over-voltage over-current protection circuit by audion VT2, audion VT3, N pole after resistance R4 with audion VT3's
The diode D1 that colelctor electrode is connected, P pole is connected with the GND pin of voltage stabilizing chip U2, the base stage phase of negative pole and audion VT3
Connect, polar capacitor C3 that positive pole base stage with audion VT2 after resistance R3 is connected, negative pole after inductance L1 with audion
The polar capacitor C5 that the colelctor electrode of VT2 is connected, positive pole positive pole with polar capacitor C3 after resistance R5 is connected, one end and pole
The adjustable resistance R11 that negative pole is connected, the other end is connected with the positive pole of polar capacitor C5 of property electric capacity C5, and P pole and three
The diode D2 composition that the emitter stage of pole pipe VT3 is connected, N pole is connected with the negative pole of polar capacitor C16；Described audion
The emitter stage of VT2 is connected with the cathode output end of diode rectifier U1；The negative pole of described polar capacitor C5 and adjustable constant-flow
Drive circuit is connected；The base stage of described audion VT3 is connected with the VOUT pin of voltage stabilizing chip U2.
Described adjustable constant-flow drive circuit is imitated with field by field effect transistor MOS1, field effect transistor MOS2, audion VT4, positive pole
Should the polar capacitor C4 that source electrode is connected, negative pole is connected with the grid of field effect transistor MOS2 of pipe MOS1, one end and field effect
The grid of pipe MOS2 is connected, resistance R6, the P pole of other end ground connection is connected with the drain electrode of field effect transistor MOS1, N pole is through resistance
The diode D3 that after R10, emitter stage with audion VT4 is connected, negative pole is connected with the emitter stage of audion VT4, positive pole with
The polar capacitor C7 that the negative pole of polar capacitor C5 is connected, positive pole source electrode with field effect transistor MOS2 after resistance R9 is connected,
Polar capacitor C6, the P pole that negative pole is connected with the base stage of audion VT4 leakage with field effect transistor MOS2 after resistance R7 is connected
Connect, the positive pole of N pole and polar capacitor C7 is collectively forming the Zener diode D4, Yi Jiyi of outfan of adjustable constant-flow drive circuit
The adjustable resistance R8 composition that end is connected with the colelctor electrode of audion VT4, the other end is connected with the P pole of Zener diode D4；
The grid of described field effect transistor MOS1 is connected with the N pole of diode D13.
For the practical effect of the present invention, it is real that described voltage stabilizing chip U2 the most preferentially uses the integrated chip of LM7809
Existing.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) instant high-voltage of voltage can be eliminated or suppress by the present invention, is effectively prevented the rear end of the present invention
Electronic component and LED digitizer tablet soft light are damaged by high voltage, and voltage and current can also be adjusted by the present invention,
The voltage and current making output is consistent with the reference voltage needed for LED digitizer tablet soft light and electric current, ensures that this
Inventing and can export stable voltage and current, and effectively ensure that the brightness stability of LED digitizer tablet soft light, illumination is equal
Even, i.e. effectively raise shooting and the quality of photography.
(2) instantaneous high current of output electric current is suppressed by the present invention, thus improve the electric current of present invention output
Stability.
(3) 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, ensures that the stability of output voltage of the present invention and electric current.
(4) 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.
(5) the voltage stabilizing chip U2 of the present invention preferentially have employed the integrated chip of LM7809 and realizes, this chip and peripheral circuit
Combine and effectively raise the present invention and export the reliability of stable voltage and current.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the voltage-regulating circuit of the present invention.
Fig. 3 is the electrical block diagram of the ICLC of the present invention.
Fig. 4 is the electrical block diagram of the audion triggering 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 voltage stabilizing chip U2, transformator T, diode rectifier U1, audion VT1, just
Pole is connected with the cathode output end of diode rectifier U1, negative pole is connected with diode rectifier U1 cathode output end is followed by
The polar capacitor C1 on ground, the surge being serially connected between the cathode output end of diode rectifier U1 and the base stage of audion VT1 electricity
Stream limiting circuit, positive pole is sequentially connected through resistance R1 colelctor electrode with audion VT1 after resistance R2, negative pole and voltage stabilizing chip
The polar capacitor C2 that the GND pin of U2 is connected, the over-voltage over-current protection circuit being connected with voltage stabilizing chip U2, it is serially connected in two poles
Voltage-regulating circuit between cathode output end and the over-voltage over-current protection circuit of pipe commutator U1, with over-voltage over-current protection circuit
The adjustable constant-flow drive circuit being connected, and it is serially connected in three between over-voltage over-current protection circuit and adjustable constant-flow drive circuit
Pole pipe triggers circuit composition.
The emitter stage of described audion VT1 is connected with the VIN pin of voltage stabilizing chip U2；Described transformator T secondary inductance
The Same Name of Ends of coil is connected with one of them input of diode rectifier U1, its non-same polarity and diode rectifier U1
Another input be connected；Same Name of Ends and the non-same polarity of described transformator T former limit inductance coil are collectively forming this power supply
Input；The outfan of described adjustable constant-flow drive circuit is as the outfan of this power supply.
Wherein, described over-voltage over-current protection circuit by audion VT2, audion VT3, resistance R3, resistance R4, resistance R5,
Adjustable resistance R11, polar capacitor C3, polar capacitor C5, diode D1, diode D2, and inductance L1 form.
During connection, the N pole of diode D1 colelctor electrode with audion VT3 after resistance R4 is connected, its P pole and voltage stabilizing core
The GND pin of sheet U2 is connected.The negative pole of polar capacitor C3 is connected with the base stage of audion VT3, its positive pole is after resistance R3
It is connected with the base stage of audion VT2.The negative pole of polar capacitor C5 colelctor electrode with audion VT2 after inductance L1 is connected,
Its positive pole positive pole with polar capacitor C3 after resistance R5 is connected.
Meanwhile, one end of adjustable resistance R11 be connected with the negative pole of polar capacitor C5, its other end and polar capacitor C5
Positive pole is connected.The P pole of diode D2 is connected with the emitter stage of audion VT3, the negative pole phase of its N pole and polar capacitor C16
Connect.The emitter stage of described audion VT2 is connected with the cathode output end of diode rectifier U1；Described polar capacitor C5's
Negative pole is connected with adjustable constant-flow drive circuit；The base stage of described audion VT3 is connected with the VOUT pin of voltage stabilizing chip U2.
Further, described adjustable constant-flow drive circuit is by field effect transistor MOS1, field effect transistor MOS2, audion VT4, electricity
Resistance R6, resistance R7, adjustable resistance R8, resistance R9, resistance R10, polar capacitor C4, polar capacitor C6, polar capacitor C7, diode
D3, and Zener diode D4 composition.
During connection, the positive pole of polar capacitor C4 is connected with the source electrode of field effect transistor MOS1, its negative pole and field effect transistor
The grid of MOS2 is connected.One end of resistance R6 is connected with the grid of field effect transistor MOS2, its other end ground connection.Diode D3
P pole be connected with the drain electrode of field effect transistor MOS1, its N pole emitter stage with audion VT4 after resistance R10 is connected.Pole
The negative pole of electric capacity C7 is connected property with the emitter stage of audion VT4, its positive pole is connected with the negative pole of polar capacitor C5.
Meanwhile, the positive pole of polar capacitor C6 source electrode with field effect transistor MOS2 after resistance R9 be connected, its negative pole and three
The base stage of pole pipe VT4 is connected.The leakage with field effect transistor MOS2 after resistance R7 of the P pole of Zener diode D4 is connected, its N pole
With the outfan that the positive pole of polar capacitor C7 is collectively forming adjustable constant-flow drive circuit.One end of adjustable resistance R8 and audion
The colelctor electrode of VT4 is connected, its other end is connected with the P pole of Zener diode D4.The grid of described field effect transistor MOS1 with
The N pole of diode D13 is connected.
As in figure 2 it is shown, described voltage-regulating circuit is by amplifier P1, audion VT5, audion VT6, resistance R12, resistance
R13, resistance R14, resistance R15, adjustable resistance R16, resistance R17, resistance R18, adjustable resistance R19, polar capacitor C8, polarity electricity
Hold C9, polar capacitor C10, polar capacitor C11, diode D5, diode D6, and Zener diode D7 composition.
During connection, the P pole of diode D5 is connected with the positive pole of amplifier P1 after resistance R13, its N pole is whole with diode
The cathode output end of stream device U1 is connected.The positive pole of polar capacitor C8 is connected with the negative pole of amplifier P1, its minus earth.Two
After P electrode resistance R14 of pole pipe D6 the negative pole with polar capacitor C8 be connected, its N pole after resistance R18 with the collection of audion VT5
Electrode is connected.
Wherein, one end of adjustable resistance R19 be connected with the N pole of diode D6, the current collection of its other end and audion VT6
Pole be connected after ground connection.The negative pole of polar capacitor C11 is connected with the base stage of audion VT6, the collection of its positive pole and audion VT5
Electrode is connected.The P pole of Zener diode D7 is connected with the emitter stage of audion VT6, its N pole after resistance R17 with three poles
The emitter stage of pipe VT5 is connected.
Meanwhile, the negative pole of polar capacitor C10 is connected with the outfan of amplifier P1, its positive pole is after adjustable resistance R16
It is connected with the N pole of Zener diode D7.The positive pole of polar capacitor C9 P pole with diode D5 after resistance R12 is connected, it
Negative pole adjustable end with adjustable resistance R16 after resistance R15 is connected.The base stage of described audion VT5 is defeated with amplifier P1's
Go out end to be connected；The N pole of described Zener diode D7 as voltage-regulating circuit outfan and and over-voltage over-current protection circuit
It is connected.
As it is shown on figure 3, described ICLC is by amplifier P2, audion VT7, resistance R20, resistance R21, electricity
Resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, polar capacitor C12, polar capacitor
C13, polar capacitor C14, polar capacitor C15, diode D8, diode D9, diode D10, and inductance L2 form.
During connection, the positive pole of polar capacitor C12 is connected with the base stage of audion VT7, its negative pole after resistance R20 with two
The cathode output end of pole pipe commutator U1 is connected.The N pole of diode D8 after resistance R22 with the emitter stage phase of audion VT7
Connect, its P pole negative pole with polar capacitor C12 after resistance R21 is connected.The negative pole of polar capacitor C13 after resistance R24 with
The N pole of diode D8 is connected, its positive pole is connected with the emitter stage of audion VT7.
Meanwhile, the P pole of diode D9 negative pole with polar capacitor C13 after resistance R23 be connected, its N pole and audion
The colelctor electrode of VT7 be connected after ground connection.The positive pole of polar capacitor C14 sequentially after resistance R27 and resistance R28 with amplifier P2's
Outfan is connected, its negative pole negative pole with amplifier P2 after resistance R26 is connected.The N pole of diode D10 is after inductance L2
Be connected with the outfan of amplifier P2, its P pole is connected with the positive pole of amplifier P2.The negative pole of polar capacitor C15 and amplification
The outfan of device P2 is connected, its positive pole positive pole with amplifier P2 after resistance R25 is connected.
The minus earth of described polar capacitor C14；The positive pole of described amplifier P2 is connected with the negative pole of polar capacitor C13
Connect, its outfan as the outfan of ICLC and is connected with the base stage of audion VT1.
As shown in Figure 4, described audion triggers circuit by audion VT8, audion VT9, resistance R29, resistance R30, electricity
Resistance R31, resistance R32, resistance R33, adjustable resistance R34, resistance R35, adjustable resistance R36, polar capacitor C16, polar capacitor
C17, polar capacitor C18, polar capacitor C19, diode D11, diode D12, and diode D13 form.
During connection, the positive pole of polar capacitor C16 base stage with audion VT8 after resistance R30 is connected, its negative pole and mistake
Pressure current foldback circuit is connected.The negative pole of polar capacitor C17 positive pole with polar capacitor C16 after resistance R29 is connected, it
Positive pole emitter stage with audion VT8 after resistance R33 is connected.The N pole of diode D11 and the positive pole phase of polar capacitor C16
Connect, its P pole colelctor electrode with audion VT8 after resistance R31 is connected.
Wherein, one end of adjustable resistance R34 be connected with the colelctor electrode of audion VT8, its other end and audion VT9
Base stage is connected.The negative pole of polar capacitor C18 is connected with the colelctor electrode of audion VT9, the current collection of its positive pole and audion VT8
Pole is connected.The P pole of diode D13 is connected with the colelctor electrode of audion VT9, its N pole is connected with adjustable constant-flow drive circuit
Connect.The positive pole of polar capacitor C19 N pole with diode D13 after adjustable resistance R36 is connected, its minus earth.
Meanwhile, one end of resistance R35 is connected with the emitter stage of audion VT9, its other end can with adjustable resistance R36's
Tune end is connected.The P pole of diode D12 is connected with the emitter stage of audion VT9, its N pole after resistance R32 with polar capacitor
The positive pole of C17 is connected.The minus earth of described polar capacitor C17；The N pole ground connection of described diode D12.
During enforcement, the instant high-voltage of voltage can be eliminated or suppress by the present invention, is effectively prevented the present invention's
Backend electronics element and LED digitizer tablet soft light are damaged by high voltage, and voltage and current can also be carried out by the present invention
Adjusting, the voltage and current making output is consistent with the reference voltage needed for LED digitizer tablet soft light and electric current, so that it is guaranteed that
The present invention can export stable voltage and current, and effectively ensure that the brightness stability of LED digitizer tablet soft light, light
According to uniformly, i.e. effectively raise shooting and the quality of photography.The instantaneous high current of output electric current is suppressed by the present invention, from
And improve the stability of the electric current of present invention output.
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, ensure that the stability of output voltage of the present invention and electric current.The present invention can be to input voltage and the height of electric current
Transient state is adjusted, and prevents the frequency of electric current from drift occur, makes voltage and current held stationary, ensures that the present invention can be defeated
Go out stable voltage and current.The voltage stabilizing chip U2 of the present invention preferentially have employed the integrated chip of LM7809 and realizes, this chip with
Peripheral circuit combines and effectively raises the present invention and export the reliability of stable voltage and current.
According to above-described embodiment, can well realize the present invention.
Claims (7)
1. the LED digitizer tablet soft light power supply of a stable performance, it is characterised in that main by voltage stabilizing chip U2, transformation
Device T, diode rectifier U1, audion VT1, be serially connected in the cathode output end of diode rectifier U1 and the base of audion VT1
ICLC between pole, positive pole is connected with the cathode output end of diode rectifier U1, negative pole and diode
Commutator U1 cathode output end be connected after the polar capacitor C1 of ground connection, positive pole sequentially after resistance R1 and resistance R2 with audion
The polar capacitor C2 that the colelctor electrode of VT1 is connected, negative pole is connected with the GND pin of voltage stabilizing chip U2, with voltage stabilizing chip U2 phase
The over-voltage over-current protection circuit connected, is serially connected between cathode output end and the over-voltage over-current protection circuit of diode rectifier U1
Voltage-regulating circuit, the adjustable constant-flow drive circuit being connected with over-voltage over-current protection circuit, and be serially connected in over-voltage and over-current
Audion between protection circuit and adjustable constant-flow drive circuit triggers circuit composition；The emitter stage of described audion VT1 is with steady
The VIN pin of pressure chip U2 is connected；The Same Name of Ends of described transformator T secondary inductance coil is with diode rectifier U1 wherein
One input is connected, its non-same polarity is connected with another input of diode rectifier U1；Described transformator T is former
The Same Name of Ends of limit inductance coil and non-same polarity are collectively forming the input of this power supply；The output of described adjustable constant-flow drive circuit
Hold the outfan as this power supply.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 1, it is characterised in that institute
State audion and trigger circuit by audion VT8, audion VT9, positive pole base stage with audion VT8 after resistance R30 is connected,
The polar capacitor C16 that negative pole is connected with over-voltage over-current protection circuit, negative pole after resistance R29 with the positive pole of polar capacitor C16
Be connected, polar capacitor C17, N pole that positive pole emitter stage with audion VT8 after resistance R33 is connected and polar capacitor C16
The diode D11 that positive pole is connected, P pole colelctor electrode with audion VT8 after resistance R31 is connected, one end and audion
The adjustable resistance R34 that the colelctor electrode of VT8 is connected, the other end is connected with the base stage of audion VT9, negative pole and audion VT9
The collection of polar capacitor C18, the P pole that colelctor electrode is connected, positive pole is connected with the colelctor electrode of audion VT8 and audion VT9
The diode D13 that electrode is connected, N pole is connected with adjustable constant-flow drive circuit, positive pole after adjustable resistance R36 with diode
The N pole of D13 is connected, the polar capacitor C19 of minus earth, one end is connected with the emitter stage of audion VT9, the other end with can
Adjust the resistance R35 that is connected of adjustable end of resistance R36, and P pole is connected with the emitter stage of audion VT9, N pole is through resistance
The diode D12 composition that after R32, positive pole with polar capacitor C17 is connected；The minus earth of described polar capacitor C17；Described
The N pole ground connection of diode D12.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 2, it is characterised in that institute
Stating ICLC by amplifier P2, audion VT7, positive pole is connected with the base stage of audion VT7, negative pole is through resistance
Polar capacitor C12, the N pole that after R20, cathode output end with diode rectifier U1 is connected after resistance R22 with audion
The diode D8 that the emitter stage of VT7 is connected, P pole negative pole with polar capacitor C12 after resistance R21 is connected, negative pole is through electricity
Be connected with the N pole of diode D8 after resistance R24, polar capacitor C13, P pole warp that positive pole is connected with the emitter stage of audion VT7
After resistance R23 the negative pole with polar capacitor C13 be connected, N pole be connected with the colelctor electrode of audion VT7 after the diode of ground connection
D9, positive pole is sequentially connected through resistance R27 outfan with amplifier P2 after resistance R28, negative pole after resistance R26 with amplification
Polar capacitor C14, the N pole that the negative pole of device P2 is connected outfan with amplifier P2 after inductance L2 is connected, P pole and amplification
The diode D10 that the positive pole of device P2 is connected, and negative pole is connected with the outfan of amplifier P2, positive pole is after resistance R25
The polar capacitor C15 composition being connected with the positive pole of amplifier P2；The minus earth of described polar capacitor C14；Described amplifier
The positive pole of P2 is connected with the negative pole of polar capacitor C13, its outfan is as the outfan of ICLC and with three
The base stage of pole pipe VT1 is connected.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 3, it is characterised in that institute
State voltage-regulating circuit by amplifier P1, audion VT5, audion VT6, P pole after resistance R13 with the positive pole phase of amplifier P1
The diode D5 that connection, N pole are connected with the cathode output end of diode rectifier U1, positive pole is connected with the negative pole of amplifier P1
Connect, be connected with the negative pole of polar capacitor C8 after polar capacitor C8, P electrode resistance R14 of minus earth, N pole after resistance R18 with
The diode D6 that the colelctor electrode of audion VT5 is connected, one end is connected with the N pole of diode D6, the other end and audion VT6
Colelctor electrode be connected after the adjustable resistance R19 of ground connection, negative pole is connected with the base stage of audion VT6, positive pole and audion VT5
Polar capacitor C11, the P pole that is connected of colelctor electrode be connected with the emitter stage of audion VT6, N pole after resistance R17 with three poles
The Zener diode D7 that the emitter stage of pipe VT5 is connected, negative pole is connected with the outfan of amplifier P1, positive pole is through adjustable resistance
The polar capacitor C10 being connected with the N pole of Zener diode D7 after R16, and positive pole after resistance R12 with the P of diode D5
The polar capacitor C9 composition that pole is connected, negative pole is connected with the adjustable end of adjustable resistance R16 after resistance R15；Described three poles
The base stage of pipe VT5 is connected with the outfan of amplifier P1；Defeated as voltage-regulating circuit of the N pole of described Zener diode D7
Go out end and be connected with over-voltage over-current protection circuit.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 4, it is characterised in that institute
Stating over-voltage over-current protection circuit by audion VT2, audion VT3, N pole colelctor electrode with audion VT3 after resistance R4 is connected
Connect, diode D1 that P pole is connected with the GND pin of voltage stabilizing chip U2, negative pole is connected with the base stage of audion VT3, positive pole
The polar capacitor C3 that base stage with audion VT2 is connected after resistance R3, negative pole after inductance L1 with the current collection of audion VT2
The polar capacitor C5 that pole is connected, positive pole positive pole with polar capacitor C3 after resistance R5 is connected, one end and polar capacitor C5
The adjustable resistance R11 that negative pole is connected, the other end is connected with the positive pole of polar capacitor C5, and P pole and audion VT3
The diode D2 composition that emitter stage is connected, N pole is connected with the negative pole of polar capacitor C16；The emitter stage of described audion VT2
It is connected with the cathode output end of diode rectifier U1；The negative pole of described polar capacitor C5 is connected with adjustable constant-flow drive circuit
Connect；The base stage of described audion VT3 is connected with the VOUT pin of voltage stabilizing chip U2.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 5, it is characterised in that institute
State adjustable constant-flow drive circuit by field effect transistor MOS1, field effect transistor MOS2, audion VT4, positive pole and field effect transistor MOS1
The grid of the polar capacitor C4 that source electrode is connected, negative pole is connected with the grid of field effect transistor MOS2, one end and field effect transistor MOS2
Pole is connected, resistance R6, the P pole of other end ground connection is connected with the drain electrode of field effect transistor MOS1, N pole after resistance R10 with three
The diode D3 that the emitter stage of pole pipe VT4 is connected, negative pole is connected with the emitter stage of audion VT4, positive pole and polar capacitor
The polar capacitor C7 that the negative pole of C5 is connected, positive pole source electrode with field effect transistor MOS2 after resistance R9 is connected, negative pole and three
Polar capacitor C6, the P pole that the base stage of pole pipe VT4 is connected leakage with field effect transistor MOS2 after resistance R7 is connected, N pole and pole
The positive pole of property electric capacity C7 is collectively forming the Zener diode D4 of the outfan of adjustable constant-flow drive circuit, and one end and audion
The adjustable resistance R8 composition that the colelctor electrode of VT4 is connected, the other end is connected with the P pole of Zener diode D4；Described field effect
The grid of pipe MOS1 is connected with the N pole of diode D13.
The LED digitizer tablet soft light power supply of a kind of stable performance the most according to claim 6, it is characterised in that institute
Stating voltage stabilizing chip U2 is the integrated chip of LM7809.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551094.0A CN106061025A (en) | 2016-07-13 | 2016-07-13 | LED digital flat soft light lamp power source having stable performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551094.0A CN106061025A (en) | 2016-07-13 | 2016-07-13 | LED digital flat soft light lamp power source having stable performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106061025A true CN106061025A (en) | 2016-10-26 |
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ID=57185707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610551094.0A Pending CN106061025A (en) | 2016-07-13 | 2016-07-13 | LED digital flat soft light lamp power source having stable performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106061025A (en) |
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2016
- 2016-07-13 CN CN201610551094.0A patent/CN106061025A/en active Pending
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Application publication date: 20161026 |