CN106132006A - A kind of LED multiple-channel output regulated power supply - Google Patents
A kind of LED multiple-channel output regulated power supply Download PDFInfo
- Publication number
- CN106132006A CN106132006A CN201610513768.8A CN201610513768A CN106132006A CN 106132006 A CN106132006 A CN 106132006A CN 201610513768 A CN201610513768 A CN 201610513768A CN 106132006 A CN106132006 A CN 106132006A
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- electric capacity
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- negative pole
- resistance
- transformator
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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
-
- 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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- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of LED multiple-channel output regulated power supply, it is characterized in that, main by diode rectifier U, transformator T, control chip U1, negative pole is connected with the cathode output end of diode rectifier U, the electric capacity C1 that 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, the electric capacity C7 that negative pole is sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9, the second-order filter circuits being serially connected between the secondary inductance coil of transformator T and diode rectifier U etc. form.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.Meanwhile, the present invention uses the integrated chip of UC3842 to combine peripheral circuit, so that the structure of the present invention is simpler, energy-conservation, more traditional regulated power supply energy consumption saves 40%.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of LED multiple-channel output 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 has had become as people
One of the main product of life lighting.Along with illuminating effect requirement is improved constantly by the universal of LED and people, to LED electricity
Source brings new challenge.The coefficient of stability of the most traditional LED power is the highest, and it is easily subject to electromagnetic signal interference, very
The illuminating effect of LED is reduced, it is impossible to reach the lighting requirement of people in big degree.
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 LED multichannel is defeated
Go out regulated power supply.
The purpose of the present invention is achieved through the following technical solutions: a kind of LED multiple-channel output regulated power supply, mainly by two poles
Pipe commutator U, transformator T, control chip U1, negative pole is connected with the cathode output end of diode rectifier U, positive pole is through resistance
The electric capacity C1 being connected with the VFIN pin of control chip U1 after R1, positive pole is connected with the cathode output end of diode rectifier U
Connect, electric capacity C7 that negative pole is sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9, be serially connected in transformator
Second-order filter circuit between secondary inductance coil and the diode rectifier U of T, the OUT pin phase of positive pole and control chip U1
The electric capacity C3 that connection, negative pole are connected with the CS pin of control chip U1 after resistance R2, is serially connected in the OUT pipe of control chip U1
Switching signal drive circuit between foot and second-order filter circuit, positive pole is connected with the RT pin of control chip U1, negative pole warp
The electric capacity C2 being connected with switching signal drive circuit after resistance R5, is serially connected in the VREF pin of control chip U1 and electric capacity C2
Resistance R4 between negative pole, and the multiplex output circuit composition being connected with the secondary inductance coil of transformator T；Described control
The GND pin ground connection of chip U1.
Further, described second-order filter circuit, by audion VT1, is serially connected in the cathode output end of diode rectifier U
And the resistance R11 between the base stage of audion VT1, positive pole is connected with the cathode output end of diode rectifier U, negative pole then with
The electric capacity C8 that the Same Name of Ends of the former limit inductance coil L1 of transformator T is connected, is serially connected in the negative pole of electric capacity C8 and audion VT1
Resistance R12, N pole between colelctor electrode is connected with the Same Name of Ends of the former limit inductance coil L2 of transformator T, two poles of P pole ground connection
Pipe D2, the resistance R10 being serially connected between the emitter stage of audion VT1 and the P pole of diode D2, positive pole is sent out with audion VT1's
The electric capacity C9 that emitter-base bandgap grading is connected, negative pole then non-same polarity with the former limit inductance coil L1 of transformator T is connected, and positive pole with
The negative pole of electric capacity C8 is connected, the negative pole electric capacity C10 composition that then negative pole with electric capacity C9 is connected after diode D1；Described change
The non-same polarity ground connection of the former limit inductance coil L2 of depressor T.
Described switching signal drive circuit, by audion VT2, field effect transistor MOS, is serially connected in base stage and the control of audion VT2
Resistance R3 between the OUT pin of coremaking sheet U1, positive pole is connected with the P pole of diode D2, negative pole after resistance R7 with three poles
The electric capacity C5 that the colelctor electrode of pipe VT2 is connected, positive pole is connected with the negative pole of electric capacity C9, negative pole after resistance R8 with field effect transistor
The electric capacity C6 that the drain electrode of MOS is connected, 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 colelctor electrode then with field effect transistor
The grid of MOS is connected.
Described multiplex output circuit is by the first output circuit being connected with the secondary inductance coil L3 of transformator T, with change
The second output circuit composition that the secondary inductance coil L4 of depressor T is connected；Described first output circuit is by manostat U2, P pole
Two poles that non-same polarity is connected, N pole is then connected with the IN pin of manostat U2 with the secondary inductance coil L3 of transformator T
Pipe D3, positive pole is connected with the N pole of diode D3, negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected
Electric capacity C11, the electric capacity C13 that positive pole is connected with the OUT pin of manostat U2, 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 is collectively forming this first output circuit
The resistance R13 composition of outfan；The GND pin of described manostat U2 be connected with the negative pole of electric capacity C11 while ground connection.
Described second output circuit is connected by the non-same polarity of manostat U3, P pole with the secondary inductance coil L4 of transformator T
Connect, diode D4 that N pole is then connected with the IN pin of manostat U3, positive pole is connected with the N pole of diode D4, negative pole then with
The electric capacity C12 that the Same Name of Ends of the secondary inductance coil L4 of transformator T is connected, positive pole is connected with the OUT pin of manostat U3,
The electric capacity C14 that negative pole then negative pole with electric capacity C12 is connected, and one end is connected with the positive pole of electric capacity C14, the other end then with
The negative pole of electric capacity C14 is collectively forming the resistance R14 composition of the outfan of this second output circuit；The GND pipe of described manostat U3
Foot 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 core
Sheet.
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 present invention
Stability 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 simpler, joint
Can, more traditional regulated power supply energy consumption saves 40%.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic 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 limited to
This.
Embodiment
As it is shown in figure 1, the LED of present invention multiple-channel output regulated power supply, mainly by diode rectifier U, transformator T,
Control chip U1, negative pole is connected with the cathode output end of diode rectifier U, positive pole after resistance R1 with control chip U1's
The electric capacity C1 that VFIN pin is connected, positive pole is connected with the cathode output end of diode rectifier U, negative pole is sequentially through resistance R9
The electric capacity C7 being connected with VCC pin with control chip U1 after electric capacity C4, is serially connected in the secondary inductance coil and two of transformator T
Second-order filter circuit between the pipe commutator U of pole, positive pole is connected with the OUT pin of control chip U1, negative pole is after resistance R2
The electric capacity C3 being connected with the CS pin of control chip U1, be serially connected in the OUT pin of control chip U1 and second-order filter circuit it
Between switching signal drive circuit, positive pole is connected with the RT pin of control chip U1, negative pole after resistance R5 with switching signal
The electric capacity C2 that drive circuit is connected, the resistance R4 being serially connected between the VREF pin of control chip U1 and the negative pole of electric capacity C2,
And the multiplex output circuit composition being connected with the secondary inductance coil of transformator T；The GND pin of described control chip U1 connects
Ground.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, electricity
Hold C10, diode D1 and diode D2 composition.
During connection, resistance R11 is serially connected between the cathode output end of diode rectifier U and the base stage of audion VT1.Electricity
The positive pole holding C8 is connected with the cathode output end of diode rectifier U, its negative pole then with the former limit inductance coil L1 of transformator T
Same Name of Ends be connected.Resistance R12 is serially connected between the negative pole of electric capacity C8 and the colelctor electrode of audion VT1.The N pole of diode D2
Be connected with the Same Name of Ends of the former limit inductance coil L2 of transformator T, its P pole ground connection.Resistance R10 is serially connected in sending out of audion VT1
Between the P pole of emitter-base bandgap grading and diode D2.The positive pole of electric capacity C9 is connected with the emitter stage of audion VT1, its negative pole then with transformation
The non-same polarity of the former limit inductance coil L1 of device T is connected.The positive pole of electric capacity C10 is connected with the negative pole of electric capacity C8, its negative pole
Then it is connected with the P pole of diode D1.The N pole of described diode D1 then negative pole with electric capacity C9 is connected.Described transformator T's
The non-same polarity ground connection of former limit inductance coil L2.
Described switching signal drive circuit is 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 OUT pin of control chip U1.Electric capacity C5's
Positive pole is connected with the P pole of diode D2, its negative pole colelctor electrode with audion VT2 after resistance R7 is connected.Electric capacity C6's
Positive pole is connected with the negative pole of electric capacity C9, the drain electrode with field effect transistor MOS after resistance R8 of its negative pole is connected.The one of resistance R6
End is connected with the source electrode of field effect transistor MOS, its other end ground connection.The emitter stage of described audion VT2 after resistance R5 with electricity
The negative pole of appearance C2 is connected, its colelctor electrode is then connected with the grid of field effect transistor MOS.
Described multiplex output circuit is by the first output circuit being connected with the secondary inductance coil L3 of transformator T, with change
The second output circuit composition that the secondary inductance coil L4 of depressor T is connected.
Wherein, described first output circuit is by manostat U2, diode D3, electric capacity C11, electric capacity C13 and resistance R13 group
Become.
During connection, the P pole of diode D3 is connected with the non-same polarity of the secondary inductance coil L3 of transformator T, its N pole then
It is connected with the IN pin of manostat U2.The positive pole of electric capacity C11 is connected with the N pole of diode D3, its negative pole then with transformator T
The Same Name of Ends of secondary inductance coil L3 be connected.The positive pole of electric capacity C13 is connected with the OUT pin of manostat U2, its negative pole
Then the negative pole with electric capacity C11 is connected.One end of resistance R13 is connected with the positive pole of electric capacity C13, its other end then with electric capacity
The negative pole of C13 is collectively forming the outfan of this first output circuit.The GND pin of described manostat U2 and the negative pole of electric capacity C11
Ground connection while being connected.In order to preferably implement the present invention, this manostat U2 preferred W7806 voltage stabilizing chip.
It addition, described second output circuit is by manostat U3, diode D4, electric capacity C12, electric capacity C14 and resistance R14 group
Become.
During connection, the P pole of diode D4 is connected with the non-same polarity of the secondary inductance coil L4 of transformator T, its N pole then
It is connected with the IN pin of manostat U3.The positive pole of electric capacity C12 is connected with the N pole of diode D4, its negative pole then with transformator T
The Same Name of Ends of secondary inductance coil L4 be connected.The positive pole of electric capacity C14 is connected with the OUT pin of manostat U3, its negative pole
Then the negative pole with electric capacity C12 is connected.One end of resistance R14 is connected with the positive pole of electric capacity C14, its other end then with electric capacity
The negative pole of C14 is collectively forming the outfan of this second output circuit.The GND pin of described manostat U3 and the negative pole of electric capacity C12
Ground connection while being connected.In order to preferably implement the present invention, this manostat U3 preferred W7806 voltage stabilizing chip.
Electromagnetic interference signal can effectively be filtered by the present invention, it is to avoid electromagnetic interference signal affects the steady of the present invention
It is qualitative, so that LED operation is more stable.Meanwhile, the present invention uses the integrated chip of UC3842 to combine peripheral circuit, so that this
The structure of invention is simpler, energy-conservation, and more traditional regulated power supply energy consumption saves 40%.
As it has been described above, just can well realize the present invention.
Claims (6)
1. a LED multiple-channel output regulated power supply, it is characterised in that mainly by diode rectifier U, transformator T, controls core
Sheet U1, negative pole is connected with the cathode output end of diode rectifier U, positive pole is managed with the VFIN of control chip U1 after resistance R1
The electric capacity C1 that foot is connected, positive pole is connected with the cathode output end of diode rectifier U, negative pole is sequentially through resistance R9 and electric capacity
The electric capacity C7 being connected with the VCC pin of control chip U1 after C4, the secondary inductance coil and the diode that are serially connected in transformator T are whole
Stream device U between second-order filter circuit, positive pole is connected with the OUT pin of control chip U1, negative pole after resistance R2 with control
The electric capacity C3 that the CS pin of chip U1 is connected, is serially connected in opening between OUT pin and the second-order filter circuit of control chip U1
OFF signal drive circuit, positive pole is connected with the RT pin of control chip U1, negative pole drives electricity with switching signal after resistance R5
The electric capacity C2 that road is connected, the resistance R4, Yi Jiyu being serially connected between the VREF pin of control chip U1 and the negative pole of electric capacity C2
The multiplex output circuit composition that the secondary inductance coil of transformator T is connected；The GND pin ground connection of described control chip U1.
A kind of LED multiple-channel output regulated power supply the most according to claim 1, it is characterised in that described second-order filter electricity
Route audion VT1, the resistance R11 being serially connected between the cathode output end of diode rectifier U and the base stage of audion VT1,
Positive pole is connected with the cathode output end of diode rectifier U, negative pole then with the Same Name of Ends of the former limit inductance coil L1 of transformator T
The electric capacity C8 being connected, resistance R12, the N pole being serially connected between the negative pole of electric capacity C8 and the colelctor electrode of audion VT1 and transformator
The Same Name of Ends of the former limit inductance coil L2 of T is connected, the diode D2 of P pole ground connection, is serially connected in the emitter stage and two of audion VT1
Resistance R10 between the P pole of pole pipe D2, positive pole is connected with the emitter stage of audion VT1, negative pole then with the former limit of transformator T
The electric capacity C9 that the non-same polarity of inductance coil L1 is connected, and positive pole is connected with the negative pole of electric capacity C8, negative pole is then through two poles
The electric capacity C10 composition that after pipe D1, negative pole with electric capacity C9 is connected；The non-same polarity of the former limit inductance coil L2 of described transformator T
Ground connection.
A kind of LED multiple-channel output regulated power supply the most according to claim 2, it is characterised in that described switching signal is driven
Galvanic electricity route audion VT2, field effect transistor MOS, it is serially connected between the base stage of audion VT2 and the OUT pin of control chip U1
Resistance R3, positive pole is connected with the P pole of diode D2, negative pole colelctor electrode with audion VT2 after resistance R7 is connected
Electric capacity C5, the electric capacity that positive pole is connected with the negative pole of electric capacity C9, negative pole is connected with the drain electrode of field effect transistor MOS after resistance R8
C6, and one end is connected with the source electrode of field effect transistor MOS, the resistance R6 of other end ground connection composition；Described audion VT2 sends out
Emitter-base bandgap grading negative pole with electric capacity C2 after resistance R5 is connected, its colelctor electrode is then connected with the grid of field effect transistor MOS.
A kind of LED multiple-channel output regulated power supply the most according to claim 3, it is characterised in that described multiple-channel output electricity
The first output circuit that route is connected with the secondary inductance coil L3 of transformator T, with the secondary inductance coil L4 phase of transformator T
The the second output circuit composition connected；Described first output circuit is by the secondary inductance coil of manostat U2, P pole Yu transformator T
The N of the diode D3 that the non-same polarity of L3 is connected, N pole is then connected with the IN pin of manostat U2, positive pole and diode D3
The electric capacity C11 that pole is connected, negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected, positive pole and manostat
The electric capacity C13 that the OUT pin of U2 is connected, negative pole then negative pole with electric capacity C11 is connected, and one end is with electric capacity C13 just
Pole is connected, the other end then negative pole with electric capacity C13 is collectively forming the resistance R13 composition of outfan of this first output circuit；
The GND pin of described manostat U2 be connected with the negative pole of electric capacity C11 while ground connection.
A kind of LED multiple-channel output regulated power supply the most according to claim 4, it is characterised in that described second output electricity
Route manostat U3, P pole is connected with the non-same polarity of the secondary inductance coil L4 of transformator T, N pole then with the IN of manostat U3
The diode D4 that pin is connected, positive pole is connected with the N pole of diode D4, negative pole then with the secondary inductance coil of transformator T
The electric capacity C12 that the Same Name of Ends of L4 is connected, positive pole is connected with the OUT pin of manostat U3, negative pole then with the negative pole of electric capacity C12
The electric capacity C14 being connected, and one end is connected with the positive pole of electric capacity C14, the other end then negative pole with electric capacity C14 is collectively forming
The resistance R14 composition of the outfan of this second output circuit；The GND pin of described manostat U3 is connected with the negative pole of electric capacity C12
Ground connection while connecing.
A kind of LED multiple-channel output regulated power supply the most according to claim 5, it is characterised in that described control chip U1
For 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 |
|---|---|---|---|
| CN201610513768.8A CN106132006A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513768.8A CN106132006A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106132006A true CN106132006A (en) | 2016-11-16 |
Family
ID=57468914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610513768.8A Withdrawn CN106132006A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106132006A (en) |
-
2016
- 2016-07-01 CN CN201610513768.8A patent/CN106132006A/en not_active Withdrawn
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Application publication date: 20161116 |
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