CN105934044A - Multi-way output voltage stabilized power supply for LED based on snubber circuit - Google Patents
Multi-way output voltage stabilized power supply for LED based on snubber circuit Download PDFInfo
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- CN105934044A CN105934044A CN201610513751.2A CN201610513751A CN105934044A CN 105934044 A CN105934044 A CN 105934044A CN 201610513751 A CN201610513751 A CN 201610513751A CN 105934044 A CN105934044 A CN 105934044A
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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 a multi-way output voltage stabilized power supply for an LED based on a snubber circuit. The power supply is characterized in mainly comprising a diode rectifier U; a transformer T; a control chip U1; a capacitor C1 of which anode is connected with the anode output end of the diode rectifier U, and cathode is connected with the VFIN pin of the control chip U1 after passing through a resistor R1; a capacitor 7 of which cathode is connected with the cathode output end of the diode rectifier U, and anode is connected with the VCC pin of the control chip U1 after successively passing through a resistor R9 and a capacitor C4; a second order filtering circuit which is connected between the secondary side inductive coil of the transformer T and the diode rectifier U; a capacitor C3 of which cathode is connected with the OUT pin of the control chip U1, and anode is connected with the CS pin of the control chip U1 after passing through a resistor R2; and so on. According to the power supply, the LED is effectively prevented from being damaged by an instant high current; the LED is enabled to work more stably; and the working life of the LED is greatly improved.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of LED multiple-channel output based on composite buffering circuit
Regulated power supply.
Background technology
At present, due to LED have that energy consumption is low, the feature such as length in service life and safety and environmental protection, it is
Become one of main product of people's life lighting.Along with the universal of LED and people are to illuminating effect requirement
Improve constantly, bring new challenge to LED power.The coefficient of stability of the most traditional LED power is not
Height, it is easily subject to electromagnetic signal interference, reduces the illuminating effect of LED to a great extent, it is impossible to reach
Lighting requirement to people.
Summary of the invention
It is an object of the invention to overcome the defect that the stability of traditional LED power is low, it is provided that a kind of based on
The LED of composite buffering circuit multiple-channel output regulated power supply.
The purpose of the present invention is achieved through the following technical solutions: a kind of LED based on composite buffering circuit is with many
Road output regulated power supply, mainly by diode rectifier U, transformator T, control chip U1, negative pole and two
The cathode output end of pole pipe commutator U is connected, positive pole after resistance R1 with the VFIN of control chip U1
The electric capacity C1 that pin is connected, positive pole is connected with the cathode output end of diode rectifier U, negative pole sequentially
Through the electric capacity C7 that resistance R9 is connected with the VCC pin of control chip U1 after electric capacity C4, it is serially connected in
Second-order filter circuit between secondary inductance coil and the diode rectifier U of transformator T, positive pole and control
The OUT pin of chip U1 is connected, negative pole CS pin with control chip U1 after resistance R2 is connected
The electric capacity C3 connect, the composite buffering circuit being connected with the OUT pin of control chip U1, it is serially connected in compound
The RT of the switching signal drive circuit between buffer circuit and second-order filter circuit, positive pole and control chip U1
The electric capacity C2 that pin is connected, negative pole is connected with switching signal drive circuit after resistance R5, is serially connected in
Resistance R4 between VREF pin and the negative pole of electric capacity C2 of control chip U1, and with transformator T
Secondary inductance coil be connected multiplex output circuit composition；The GND pin of described control chip U1 connects
Ground.
Further, described composite buffering circuit by audion VT3, audion VT4, field effect transistor MOS1,
Amplifier P1, amplifier P2, amplifier P3, one end is connected with the base stage of audion VT3, the other end
The colelctor electrode of the resistance R15 being then connected with the OUT pin of control chip U1, one end and audion VT3
Be connected, resistance R16, P that the other end is connected with the drain electrode of field effect transistor MOS1 after resistance R17
Pole is connected with the emitter stage of audion VT3, N pole after resistance R19 with the source electrode of field effect transistor MOS1
The diode D5 being connected, is serially connected between the source electrode of field effect transistor MOS1 and the negative pole of amplifier P2
Resistance R18, N pole is connected with the negative pole of amplifier P2, P pole then outfan with amplifier P1 is connected
Diode D6, positive pole is connected with the positive pole of amplifier P2, negative pole then with the outfan phase of amplifier P2
The electric capacity C15 connected, is serially connected in the resistance between the outfan of amplifier P2 and the colelctor electrode of audion VT4
R22, the resistance R21 being serially connected between the positive pole of amplifier P3 and the base stage of audion VT4, positive pole with put
The outfan of big device P3 is connected, negative pole then forms the electric capacity C17 of outfan of this composite buffering circuit, with
And negative pole is connected with the emitter stage of audion VT4, positive pole after resistance R20 with the negative pole of amplifier P1
The electric capacity C16 composition being connected；The colelctor electrode of described audion VT3 and the grid phase of field effect transistor MOS1
Connect；The positive pole of described amplifier P1 is connected with the N pole of diode D5, its negative pole and outfan all connect
Ground；The negative pole of described amplifier P3 is connected with the outfan of amplifier P1；Described composite buffering circuit
Outfan is then connected with switching signal drive circuit.
Described second-order filter circuit by audion VT1, be serially connected in diode rectifier U cathode output end and
Resistance R11 between the base stage of audion VT1, positive pole is connected with the cathode output end of diode rectifier U
Connect, electric capacity C8 that negative pole then Same Name of Ends with the former limit inductance coil L1 of transformator T is connected, be serially connected in
Resistance R12, N pole between negative pole and the colelctor electrode of audion VT1 of electric capacity C8 is former with transformator T's
The Same Name of Ends of limit inductance coil L2 is connected, the diode D2 of P pole ground connection, is serially connected in audion VT1's
Resistance R10 between the P pole of emitter stage and diode D2, positive pole is connected with the emitter stage of audion VT1
Connect, electric capacity C9 that negative pole then non-same polarity with the former limit inductance coil L1 of transformator T is connected, and
Positive pole is connected with the negative pole of electric capacity C8, negative pole then after diode D1 negative pole with electric capacity C9 be connected
Electric capacity C10 composition；The non-same polarity ground connection of the former limit inductance coil L2 of described transformator T.
Described switching signal drive circuit, by audion VT2, field effect transistor MOS, is serially connected in audion VT2
Base stage and the outfan of composite buffering circuit between resistance R3, positive pole is extremely connected with the P of diode D2
Connect, electric capacity C5 that negative pole colelctor electrode with audion VT2 after resistance R7 is connected, positive pole and electric capacity C9
The electric capacity C6 that negative pole is connected, negative pole is connected with the drain electrode of field effect transistor MOS after resistance R8, with
And one end is connected with the source electrode of field effect transistor MOS, the resistance R6 of other end ground connection composition；Described three poles
The emitter stage of pipe VT2 negative pole with electric capacity C2 after resistance R5 is connected, its colelctor electrode then with field effect transistor
The grid of MOS is connected.
Described multiplex output circuit is by the first output electricity being connected with the secondary inductance coil L3 of transformator T
Road, the second output circuit composition being connected with the secondary inductance coil L4 of transformator T；Described first output
Circuit is connected by the non-same polarity of manostat U2, P pole with the secondary inductance coil L3 of transformator T, N
The diode D3 that pole is then connected with the IN pin of manostat U2, positive pole is extremely connected with the N of diode D3
Connect, electric capacity C11 that negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected, positive pole with
The electric capacity C13 that the OUT pin of manostat U2 is connected, negative pole then negative pole with electric capacity C11 is connected,
And one end is connected with the positive pole of electric capacity C13, the other end then negative pole with electric capacity C13 be collectively forming this
The resistance R13 composition of the outfan of one output circuit；The GND pin of described manostat U2 and electric capacity C11
Negative pole be connected while ground connection.
Described second output circuit is non-by manostat U3, P pole and the secondary inductance coil L4's of transformator T
The diode D4 that Same Name of Ends is connected, N pole is then connected with the IN pin of manostat U3, positive pole and two poles
The N pole of pipe D4 is connected, negative pole then Same Name of Ends with the secondary inductance coil L4 of transformator T is connected
Electric capacity C12, positive pole is connected with the OUT pin of manostat U3, negative pole then with the negative pole phase of electric capacity C12
The electric capacity C14 connected, and one end is connected with the positive pole of electric capacity C14, the other end is then with electric capacity C14's
Negative pole is collectively forming the resistance R14 composition of the outfan of this second output circuit；The GND of described manostat U3
Pin be connected with the negative pole of electric capacity C12 while ground connection.
Described control chip U1 is the integrated chip of UC3842, and described manostat U2 and manostat U3 is
W7806 voltage stabilizing chip.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) electromagnetic interference signal can effectively be filtered by the present invention, it is to avoid electromagnetic interference signal affects
The stability of the present invention, so that LED operation is more stable.
(2) present invention uses the integrated chip of UC3842 to combine peripheral circuit, so that the structure of the present invention is more
Adding simple, energy-conservation, more traditional regulated power supply energy consumption saves 40%.
(3) present invention can effectively prevent instantaneous high current from damaging LED, makes LED operation more stable,
Extend the working life of LED greatly.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the composite buffering circuit structure diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, 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 LED multiple-channel output regulated power supply based on composite buffering circuit of the present invention, main
Will be by diode rectifier U, transformator T, control chip U1, negative pole and the negative pole of diode rectifier U
The electric capacity C1 that outfan is connected, positive pole is connected with the VFIN pin of control chip U1 after resistance R1,
Positive pole is connected with the cathode output end of diode rectifier U, negative pole is sequentially after resistance R9 and electric capacity C4
The electric capacity C7 being connected with the VCC pin of control chip U1, is serially connected in the secondary inductance coil of transformator T
And the second-order filter circuit between diode rectifier U, positive pole is connected with the OUT pin of control chip U1
Connect, electric capacity C3 that negative pole is connected with the CS pin of control chip U1 after resistance R2, with control chip
The composite buffering circuit that the OUT pin of U1 is connected, is serially connected in composite buffering circuit and second-order filter circuit
Between switching signal drive circuit, positive pole is connected with the RT pin of control chip U1, negative pole is through resistance
The electric capacity C2 being connected with switching signal drive circuit after R5, is serially connected in the VREF pin of control chip U1
And the resistance R4 between the negative pole of electric capacity C2, and it is connected many with the secondary inductance coil of transformator T
Road output circuit composition；The GND pin ground connection of described control chip U1.In order to preferably implement the present invention,
The described control chip U1 integrated chip of preferred UC3842 realizes.
Described second-order filter circuit is by audion VT1, resistance R11, resistance R12, resistance R10, electric capacity
C8, electric capacity C9, electric capacity C10, diode D1 and diode D2 form.
During connection, resistance R11 is serially connected in cathode output end and the base of audion VT1 of diode rectifier U
Between pole.The positive pole of electric capacity C8 is connected with the cathode output end of diode rectifier U, its negative pole then with change
The Same Name of Ends of the former limit inductance coil L1 of depressor T is connected.Resistance R12 be serially connected in electric capacity C8 negative pole and
Between the colelctor electrode of audion VT1.The N pole of diode D2 and the former limit inductance coil L2 of transformator T
Same Name of Ends be connected, its P pole ground connection.Resistance R10 is serially connected in emitter stage and the diode of audion VT1
Between the P pole of D2.The positive pole of electric capacity C9 is connected with the emitter stage of audion VT1, its negative pole then with change
The non-same polarity of the former limit inductance coil L1 of depressor T is connected.The positive pole of electric capacity C10 is negative with electric capacity C8's
Pole is connected, its negative pole is then connected with the P pole of diode D1.The N pole of described diode D1 then with electricity
The negative pole holding C9 is connected.The non-same polarity ground connection of the former limit inductance coil L2 of described transformator T.
Described switching signal drive circuit by audion VT2, field effect transistor MOS, resistance R3, resistance R7,
Resistance R8, resistance R6, electric capacity C5 and electric capacity C6 form.
During connection, resistance R3 is serially connected between the base stage of audion VT2 and the outfan of composite buffering circuit.
The positive pole of electric capacity C5 is connected with the P pole of diode D2, its negative pole after resistance R7 with audion VT2
Colelctor electrode be connected.The positive pole of electric capacity C6 is connected with the negative pole of electric capacity C9, its negative pole is through resistance R8
It is connected with the drain electrode of field effect transistor MOS afterwards.The source electrode phase of one end of resistance R6 and field effect transistor MOS
Connection, its other end ground connection.The emitter stage of described audion VT2 after resistance R5 with the negative pole of electric capacity C2
Be connected, its colelctor electrode is then connected with the grid of field effect transistor MOS.
Described multiplex output circuit is by the first output electricity being connected with the secondary inductance coil L3 of transformator T
Road, the second output circuit composition being connected with the secondary inductance coil L4 of transformator T.
Wherein, described first output circuit is by manostat U2, diode D3, electric capacity C11, electric capacity C13
And resistance R13 composition.
During connection, the P pole of diode D3 is connected with the non-same polarity of the secondary inductance coil L3 of transformator T
Connect, its N pole is then connected with the IN pin of manostat U2.The positive pole of electric capacity C11 is with diode D3's
N pole is connected, its negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected.Electric capacity
The positive pole of C13 is connected with the OUT pin of manostat U2, its negative pole then negative pole with electric capacity C11 is connected
Connect.One end of resistance R13 is connected with the positive pole of electric capacity C13, its other end then with the negative pole of electric capacity C13
It is collectively forming the outfan of this first output circuit.The GND pin of described manostat U2 is with electric capacity C11's
Negative pole be connected while ground connection.In order to preferably implement the present invention, the preferred W7806 of this manostat U2 is steady
Pressure chip.
It addition, described second output circuit is by manostat U3, diode D4, electric capacity C12, electric capacity C14
And resistance R14 composition.
During connection, the P pole of diode D4 is connected with the non-same polarity of the secondary inductance coil L4 of transformator T
Connect, its N pole is then connected with the IN pin of manostat U3.The positive pole of electric capacity C12 is with diode D4's
N pole is connected, its negative pole then Same Name of Ends with the secondary inductance coil L4 of transformator T is connected.Electric capacity
The positive pole of C14 is connected with the OUT pin of manostat U3, its negative pole then negative pole with electric capacity C12 is connected
Connect.One end of resistance R14 is connected with the positive pole of electric capacity C14, its other end then with the negative pole of electric capacity C14
It is collectively forming the outfan of this second output circuit.The GND pin of described manostat U3 is with electric capacity C12's
Negative pole be connected while ground connection.In order to preferably implement the present invention, the preferred W7806 of this manostat U3 is steady
Pressure chip.
As in figure 2 it is shown, this composite buffering circuit is by audion VT3, audion VT4, field effect transistor MOS1,
Amplifier P1, amplifier P2, amplifier P3, resistance R15, resistance R16, resistance R17, resistance R18,
Resistance R19, resistance R20, resistance R21, resistance R22, diode D5, diode D6, electric capacity C15,
Electric capacity C16 and electric capacity C17 composition.
During connection, one end of resistance R15 is connected with the base stage of audion VT3, its other end then with control
The OUT pin of chip U1 is connected.One end of resistance R16 is connected with the colelctor electrode of audion VT3,
The drain electrode with field effect transistor MOS1 after resistance R17 of its other end is connected.The P pole of diode D5 with
The emitter stage of audion VT3 is connected, its N pole after resistance R19 with the source electrode phase of field effect transistor MOS1
Connect.Resistance R18 is serially connected between the source electrode of field effect transistor MOS1 and the negative pole of amplifier P2.Diode
The N pole of D6 is connected with the negative pole of amplifier P2, its P pole then outfan with amplifier P1 is connected.
The positive pole of electric capacity C15 is connected with the positive pole of amplifier P2, its negative pole then with the outfan phase of amplifier P2
Connect.Resistance R22 is serially connected between the outfan of amplifier P2 and the colelctor electrode of audion VT4.Resistance
R21 is serially connected between the positive pole of amplifier P3 and the base stage of audion VT4.The positive pole of electric capacity C17 with put
The outfan of big device P3 is connected, its negative pole then forms the outfan of this composite buffering circuit and through resistance R3
Base stage with audion VT2 is connected afterwards.The negative pole of electric capacity C16 is connected with the emitter stage of audion VT4,
Its positive pole negative pole with amplifier P1 after resistance R20 is connected.
The described colelctor electrode of audion VT3 is connected with the grid of field effect transistor MOS1.Described amplifier P1
Positive pole be connected with the N pole of diode D5, its negative pole and the equal ground connection of outfan.Described amplifier P3's
Negative pole is connected with the outfan of amplifier P1.
Electromagnetic interference signal can effectively be filtered by the present invention, it is to avoid electromagnetic interference signal affects this
Bright stability, so that LED operation is more stable.Meanwhile, the present invention uses the integrated chip of UC3842
In conjunction with peripheral circuit, can effectively prevent instantaneous high current from damaging LED, make LED operation more stable,
Extend the working life of LED greatly.
As it has been described above, just can well realize the present invention.
Claims (7)
1. a LED multiple-channel output regulated power supply based on composite buffering circuit, it is characterised in that main
Will be by diode rectifier U, transformator T, control chip U1, negative pole and the negative pole of diode rectifier U
The electric capacity C1 that outfan is connected, positive pole is connected with the VFIN pin of control chip U1 after resistance R1,
Positive pole is connected with the cathode output end of diode rectifier U, negative pole is sequentially after resistance R9 and electric capacity C4
The electric capacity C7 being connected with the VCC pin of control chip U1, is serially connected in the secondary inductance coil of transformator T
And the second-order filter circuit between diode rectifier U, positive pole is connected with the OUT pin of control chip U1
Connect, electric capacity C3 that negative pole is connected with the CS pin of control chip U1 after resistance R2, with control chip
The composite buffering circuit that the OUT pin of U1 is connected, is serially connected in composite buffering circuit and second-order filter circuit
Between switching signal drive circuit, positive pole is connected with the RT pin of control chip U1, negative pole is through resistance
The electric capacity C2 being connected with switching signal drive circuit after R5, is serially connected in the VREF pin of control chip U1
And the resistance R4 between the negative pole of electric capacity C2, and it is connected many with the secondary inductance coil of transformator T
Road output circuit composition；The GND pin ground connection of described control chip U1.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 1
Power supply, it is characterised in that described composite buffering circuit is by audion VT3, audion VT4, field effect transistor
MOS1, amplifier P1, amplifier P2, amplifier P3, one end is connected with the base stage of audion VT3,
The resistance R15 that the other end is then connected with the OUT pin of control chip U1, one end is with audion VT3's
The resistance that colelctor electrode is connected, the other end is connected with the drain electrode of field effect transistor MOS1 after resistance R17
R16, P pole is connected with the emitter stage of audion VT3, N pole after resistance R19 with field effect transistor MOS1
The diode D5 that is connected of source electrode, be serially connected in source electrode and the negative pole of amplifier P2 of field effect transistor MOS1
Between resistance R18, N pole be connected with the negative pole of amplifier P2, P pole then with the outfan of amplifier P1
The diode D6 being connected, positive pole is connected with the positive pole of amplifier P2, negative pole then defeated with amplifier P2
Go out the electric capacity C15 that end is connected, be serially connected between the outfan of amplifier P2 and the colelctor electrode of audion VT4
Resistance R22, the resistance R21 being serially connected between the positive pole of amplifier P3 and the base stage of audion VT4, just
Pole is connected with the outfan of amplifier P3, negative pole then forms the electric capacity of outfan of this composite buffering circuit
C17, and negative pole is connected with the emitter stage of audion VT4, positive pole after resistance R20 with amplifier P1
Negative pole be connected electric capacity C16 composition；The colelctor electrode of described audion VT3 and field effect transistor MOS1
Grid is connected；The positive pole of described amplifier P1 is connected with the N pole of diode D5, its negative pole and output
Hold equal ground connection；The negative pole of described amplifier P3 is connected with the outfan of amplifier P1；Described composite buffering
The outfan of circuit is then connected with switching signal drive circuit.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 2
Power supply, it is characterised in that described second-order filter circuit, by audion VT1, is serially connected in diode rectifier U
Cathode output end and the base stage of audion VT1 between resistance R11, positive pole and diode rectifier U's
The electricity that cathode output end is connected, negative pole then Same Name of Ends with the former limit inductance coil L1 of transformator T is connected
Hold C8, resistance R12, the N pole being serially connected between the negative pole of electric capacity C8 and the colelctor electrode of audion VT1 with
The Same Name of Ends of the former limit inductance coil L2 of transformator T is connected, the diode D2 of P pole ground connection, is serially connected in
Resistance R10 between emitter stage and the P pole of diode D2 of audion VT1, positive pole and audion VT1
The electricity that emitter stage is connected, negative pole then non-same polarity with the former limit inductance coil L1 of transformator T is connected
Hold C9, and positive pole is connected with the negative pole of electric capacity C8, negative pole then after diode D1 with electric capacity C9's
The electric capacity C10 composition that negative pole is connected；The non-same polarity ground connection of the former limit inductance coil L2 of described transformator T.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 3
Power supply, it is characterised in that described switching signal drive circuit is by audion VT2, field effect transistor MOS, string
The resistance R3 being connected between the base stage of audion VT2 and the outfan of composite buffering circuit, positive pole and diode
The electric capacity C5 that the P pole of D2 is connected, negative pole colelctor electrode with audion VT2 after resistance R7 is connected,
Positive pole is connected with the negative pole of electric capacity C9, negative pole drain electrode with field effect transistor MOS after resistance R8 is connected
The electric capacity C6 connect, and one end is connected with the source electrode of field effect transistor MOS, the resistance R6 of other end ground connection
Composition；The emitter stage of described audion VT2 negative pole with electric capacity C2 after resistance R5 is connected, its current collection
Pole is then connected with the grid of field effect transistor MOS.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 4
Power supply, it is characterised in that described multiplex output circuit is connected by the secondary inductance coil L3 with transformator T
The first output circuit, be connected with the secondary inductance coil L4 of transformator T second output circuit composition；
Described first output circuit is non-of the same name by manostat U2, P pole and the secondary inductance coil L3's of transformator T
The diode D3 that end is connected, N pole is then connected with the IN pin of manostat U2, positive pole and diode
The electricity that the N pole of D3 is connected, negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected
Holding C11, positive pole is connected with the OUT pin of manostat U2, negative pole then negative pole with electric capacity C11 is connected
The electric capacity C13 connect, and one end is connected with the positive pole of electric capacity C13, the other end then negative with electric capacity C13
Pole is collectively forming the resistance R13 composition of the outfan of this first output circuit；The GND of described manostat U2
Pin be connected with the negative pole of electric capacity C11 while ground connection.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 5
Power supply, it is characterised in that described second output circuit is by the secondary electricity of manostat U3, P pole with transformator T
The diode that non-same polarity is connected, N pole is then connected with the IN pin of manostat U3 of sense coil L4
D4, positive pole is connected with the N pole of diode D4, negative pole then with the secondary inductance coil L4 of transformator T
The electric capacity C12 that is connected of Same Name of Ends, positive pole is connected with the OUT pin of manostat U3, negative pole then with
The electric capacity C14 that the negative pole of electric capacity C12 is connected, and one end is connected with the positive pole of electric capacity C14, another
End then negative pole with electric capacity C14 is collectively forming the resistance R14 composition of the outfan of this second output circuit；Institute
The negative pole of the GND pin and electric capacity C12 of stating manostat U3 be connected while ground connection.
A kind of LED multiple-channel output voltage stabilizing based on composite buffering circuit the most according to claim 6
Power supply, it is characterised in that described control chip U1 is the integrated chip of UC3842, described manostat U2 and
Manostat U3 is W7806 voltage stabilizing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513751.2A CN105934044A (en) | 2016-07-01 | 2016-07-01 | Multi-way output voltage stabilized power supply for LED based on snubber circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513751.2A CN105934044A (en) | 2016-07-01 | 2016-07-01 | Multi-way output voltage stabilized power supply for LED based on snubber circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105934044A true CN105934044A (en) | 2016-09-07 |
Family
ID=56829813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610513751.2A Withdrawn CN105934044A (en) | 2016-07-01 | 2016-07-01 | Multi-way output voltage stabilized power supply for LED based on snubber circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105934044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604472A (en) * | 2016-12-30 | 2017-04-26 | 深圳Tcl数字技术有限公司 | Led drive circuit |
-
2016
- 2016-07-01 CN CN201610513751.2A patent/CN105934044A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604472A (en) * | 2016-12-30 | 2017-04-26 | 深圳Tcl数字技术有限公司 | Led drive circuit |
| CN106604472B (en) * | 2016-12-30 | 2019-05-31 | 深圳Tcl数字技术有限公司 | LED drive circuit |
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Application publication date: 20160907 |
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| WW01 | Invention patent application withdrawn after publication |