CN106028545A - Light-operated LED switch power supply - Google Patents
Light-operated LED switch power supply Download PDFInfo
- Publication number
- CN106028545A CN106028545A CN201610524932.5A CN201610524932A CN106028545A CN 106028545 A CN106028545 A CN 106028545A CN 201610524932 A CN201610524932 A CN 201610524932A CN 106028545 A CN106028545 A CN 106028545A
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- CN
- China
- Prior art keywords
- pole
- audion
- resistance
- polar capacitor
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a light-operated LED switch power supply. The light-operated LED switch power supply is characterized by mainly consisting of a control chip U2, a transformer T, a diode rectifier U1, a polarity capacitor C1, a polarity capacitor C2, a voltage-stabilizing diode D1, a pulse adjustment circuit connected with the control chip U2, and a voltage conditioning output circuit connected with the control chip U2 and the diode rectifier U1. According to the invention, pulses of input voltages and currents can be dynamically adjusted, intensity of output voltages and currents can also be adjusted, the stability of the output voltages and currents is guaranteed, the stability of brightness of a light-operated LED lamp is effectively ensured, and the service life of the LED lamp is prolonged.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of light-operated LED Switching 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.People's many employings acoustic control or light-operated control system in life
System realizes the open and close to LED.Light-operated LED control system can use according to LED because of it
The brightness of environment controls the open and close of LED, and can effectively meet people to LED energy-conservation
The requirement of aspect, and enjoy the favor of people.But, existing light-operated LED power supply exist output voltage and
The problem that electric current is unstable, the brightness causing light-operated LED (liquid crystal diode) lamp is unstable, has had a strong impact on the use of LED
Life-span.
Therefore it provides a kind of light-operated LED power supply that can export stable voltage and current is the task of top priority.
Summary of the invention
It is an object of the invention to overcome light-operated LED power supply of the prior art to there is output voltage and electric current not
Stable defect, it is provided that a kind of light-operated LED Switching Power Supply.
The present invention is achieved through the following technical solutions: a kind of light-operated LED Switching Power Supply, mainly by controlling core
Sheet U2, transformator T, diode rectifier U1, the cathode output end phase of positive pole and diode rectifier U1
The polar capacitor C1 that connection, negative pole are connected with the cathode output end of diode rectifier U1, positive pole and pole
The pole that the positive pole of property electric capacity C1 is connected, negative pole negative pole with polar capacitor C1 after resistance R1 is connected
Property electric capacity C2, N pole be connected with the VIN pin of control chip U2, P pole and diode rectifier U1
The Zener diode D1 that is connected of cathode output end, the phase adjusting circuit being connected with control chip U2,
And the voltage conditioning output circuit composition being connected with control chip U2 and diode rectifier U1 respectively；
Described phase adjusting circuit is connected with voltage conditioning output circuit；Described transformator T secondary inductance coil
Same Name of Ends is connected with one of them input of diode rectifier U1, its non-same polarity and diode rectification
Another input of device U1 is connected；The GND pin ground connection of control chip U2.
Described phase adjusting circuit by audion VT1, audion VT2, positive pole after resistance R1 with control core
The polar capacitor C3, P that the SS pin of sheet U2 is connected, negative pole is connected with the emitter stage of audion VT1
Pole is connected with the SIN pin of control chip U2, N pole is connected with the colelctor electrode of audion VT1 two
Pole pipe D2, positive pole COC pin with control chip U2 after resistance R4 is connected, negative pole is through resistance R3
The FC pipe of the polar capacitor C4 that the emitter stage with audion VT1 is connected afterwards, negative pole and control chip U2
The polar capacitor C5 that foot is connected, positive pole colelctor electrode with audion VT2 after resistance R5 is connected, with
And N pole CR pin with control chip U2 after resistance R7 is connected, P pole after resistance R6 with three
The diode D3 composition that the emitter stage of pole pipe VT2 is connected；The N pole of described diode D3 and control core
The SHDN pin of sheet U2 is connected, its P pole as the outfan of phase adjusting circuit and is nursed one's health with voltage
Output circuit is connected；The base stage of described audion VT2 is connected with the base stage of audion VT1, it is launched
Pole be connected with the negative pole of polar capacitor C4 after ground connection；The positive pole of described polar capacitor C4 and audion VT1
Base stage be connected.
Described voltage conditioning output circuit is by field effect transistor MOS, audion VT3, and positive pole is after resistance R8
Be connected with the emitter stage of audion VT3, negative pole is connected with the cathode output end of diode rectifier U1
The drain electrode with field effect transistor MOS after adjustable resistance R12 of polar capacitor C6, N pole be connected, P pole
The Zener diode D5 being connected with the P pole of diode D3, one end is connected with the positive pole of polar capacitor C6,
Inductance L2, the N pole that the other end is connected with the N pole of Zener diode D5 after resistance R10 with field effect
The diode D4 that the source electrode of pipe MOS is connected, P pole is connected with the base stage of audion VT3, negative pole with
The polar capacitor that the colelctor electrode of audion VT3 is connected, positive pole is connected with the grid of field effect transistor MOS
C7, and positive pole be sequentially connected through resistance R9 FB pin with control chip U2 after inductance L1, negative
The polar capacitor C8 composition that pole is connected with the adjustable end of adjustable resistance R12 after resistance R11；Described surely
The N pole of pressure diode D5 is connected with the negative pole of polar capacitor C6；The grid of described field effect transistor MOS
Be connected with VOUT pin and the PWM pin of control chip U2 respectively, it drains and Zener diode
The N pole of D5 is collectively forming the outfan of voltage conditioning output circuit.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated chip of L296
Realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention can to input voltage and the pulse of electric current be dynamically adjusted, and the present invention can also be right
The intensity of output voltage and electric current is adjusted, and ensures that stablizing of the voltage and current that the present invention exports
Property, effectively ensure that the stability of light-operated LED (liquid crystal diode) lamp brightness, and improve the service life of LED.
(2) the control chip U of the present invention uses the integrated chip of L296 to realize, and this chip and external electrical
Road combines and effectively raises stability and the reliability of output voltage of the present invention and electric current.
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 and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, transformator T, diode rectifier U1, pole
Property electric capacity C1, polar capacitor C2, Zener diode D1, phase adjusting circuit, and voltage conditioning output
Circuit forms.
During connection, the positive pole of polar capacitor C1 is connected with the cathode output end of diode rectifier U1, it
Negative pole is connected with the cathode output end of diode rectifier U1.The positive pole of polar capacitor C2 and polar capacitor
The positive pole of C1 is connected, negative pole negative pole with polar capacitor C1 after resistance R1 is connected.Zener diode
The N pole of D1 is connected with the VIN pin of control chip U2, its P pole and diode rectifier U1 just
Pole outfan is connected.Phase adjusting circuit is connected with control chip U2.Voltage conditioning output circuit is respectively
It is connected with control chip U2 and diode rectifier U1.
Described phase adjusting circuit is connected with voltage conditioning output circuit；Described transformator T secondary inductance line
The Same Name of Ends of circle is connected with one of them input of diode rectifier U1, its non-same polarity and diode
Another input of commutator U1 is connected；The GND pin ground connection of control chip U2；Described transformation
The Same Name of Ends of device T former limit inductance coil is connected with external power source respectively with non-same polarity.
Wherein, described phase adjusting circuit by audion VT1, audion VT2, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, resistance R7, polar capacitor C3, polar capacitor C4, polar capacitor
C5, diode D2, and diode D3 form.
During connection, the positive pole of polar capacitor C3 SS pin with control chip U2 after resistance R1 is connected,
Its negative pole is connected with the emitter stage of audion VT1.The P pole of diode D2 and the SIN of control chip U2
Pin is connected, its N pole is connected with the colelctor electrode of audion VT1.The positive pole of polar capacitor C4 is through electricity
Resistance R4 after be connected with the COC pin of control chip U2, its negative pole after resistance R3 with audion VT1
Emitter stage be connected.The negative pole of polar capacitor C5 is connected with the FC pin of control chip U2, its just
Pole colelctor electrode with audion VT2 after resistance R5 is connected.The N pole of diode D3 is after resistance R7
Be connected with the CR pin of control chip U2, its P pole after resistance R6 with the emitter stage of audion VT2
It is connected.
The N pole of described diode D3 is connected with the SHDN pin of control chip U2, its P pole conduct
The outfan of phase adjusting circuit is also connected with voltage conditioning output circuit；The base stage of described audion VT2
Be connected with the base stage of audion VT1, its emitter stage be connected with the negative pole of polar capacitor C4 after ground connection；
The positive pole of described polar capacitor C4 is connected with the base stage of audion VT1.
Further, described voltage conditioning output circuit by field effect transistor MOS, audion VT3, resistance R8,
Resistance R9, resistance R10, resistance R11, adjustable resistance R12, polar capacitor C6, polar capacitor C7,
Polar capacitor C8, diode D4, Zener diode D5, and inductance L2 form.
During connection, the positive pole of polar capacitor C6 emitter stage with audion VT3 after resistance R8 is connected,
Its negative pole is connected with the cathode output end of diode rectifier U1.The N pole of Zener diode D5 is through adjustable
After resistance R12, the drain electrode with field effect transistor MOS is connected, its P pole is connected with the P pole of diode D3.
One end of inductance L2 is connected with the positive pole of polar capacitor C6, the N of its other end and Zener diode D5
Pole is connected.
Meanwhile, the N pole of diode D4 source electrode with field effect transistor MOS after resistance R10 be connected, its
P pole is connected with the base stage of audion VT3.The negative pole of polar capacitor C7 and the colelctor electrode of audion VT3
Be connected, its positive pole is connected with the grid of field effect transistor MOS.The positive pole of polar capacitor C8 is sequentially through electricity
Resistance R9 is connected with FB pin with control chip U2 after inductance L1, its negative pole after resistance R11 with can
The adjustable end adjusting resistance R12 is connected.
The N pole of described Zener diode D5 is connected with the negative pole of polar capacitor C6；Described field effect transistor
The grid of MOS is connected with VOUT pin and the PWM pin of control chip U2 respectively, its drain electrode with
The N pole of Zener diode D5 is collectively forming the outfan of voltage conditioning output circuit and is connected with LED.
During operation, the pulse of input voltage and electric current can be dynamically adjusted by the present invention, and the present invention is also
The intensity of output voltage and electric current can be adjusted, ensure that the voltage and current that the present invention exports
Stability, effectively ensure that the stability of light-operated LED (liquid crystal diode) lamp brightness, and improves the use longevity of LED
Life.
Meanwhile, the control chip U of the present invention uses the integrated chip of L296 to realize, and this chip has overheated guarantor
Protect and the function such as short-circuit protection, and this chip combines with external circuit and effectively raises present invention output
The stability of voltage and current and reliability.
According to above-described embodiment, can well realize the present invention.
Claims (4)
1. a light-operated LED Switching Power Supply, it is characterised in that main by control chip U2, transformator T,
Diode rectifier U1, positive pole is connected with the cathode output end of diode rectifier U1, negative pole and two poles
The polar capacitor C1 that the cathode output end of pipe commutator U1 is connected, the positive pole phase of positive pole and polar capacitor C1
Connect, polar capacitor C2, N pole that negative pole negative pole with polar capacitor C1 after resistance R1 is connected and control
The VIN pin of coremaking sheet U2 is connected, P pole is connected with the cathode output end of diode rectifier U1
Zener diode D1, the phase adjusting circuit being connected with control chip U2, and respectively with control chip
The voltage conditioning output circuit composition that U2 and diode rectifier U1 is connected；Described phase adjusting circuit with
Voltage conditioning output circuit is connected；The Same Name of Ends of described transformator T secondary inductance coil and diode rectification
One of them input of device U1 is connected, another input of its non-same polarity and diode rectifier U1
End is connected；The GND pin ground connection of control chip U2.
A kind of light-operated LED Switching Power Supply the most according to claim 1, it is characterised in that described arteries and veins
Reconstitute whole circuit by audion VT1, audion VT2, positive pole after resistance R1 with the SS of control chip U2
Polar capacitor C3, the P pole that pin is connected, negative pole is connected with the emitter stage of audion VT1 and control core
The diode D2 that the SIN pin of sheet U2 is connected, N pole is connected with the colelctor electrode of audion VT1, just
Pole COC pin with control chip U2 after resistance R4 is connected, negative pole after resistance R3 with audion
The polar capacitor C4 that the emitter stage of VT1 is connected, negative pole is connected with the FC pin of control chip U2,
The polar capacitor C5 that positive pole colelctor electrode with audion VT2 after resistance R5 is connected, and N pole is through electricity
Resistance R7 after be connected with the CR pin of control chip U2, P pole after resistance R6 with audion VT2's
The diode D3 composition that emitter stage is connected；The N pole of described diode D3 and the SHDN of control chip U2
Pin is connected, its P pole as the outfan of phase adjusting circuit and is connected with voltage conditioning output circuit；
The base stage of described audion VT2 is connected with the base stage of audion VT1, its emitter stage and polar capacitor C4
Negative pole be connected after ground connection；The positive pole of described polar capacitor C4 is connected with the base stage of audion VT1.
A kind of light-operated LED Switching Power Supply the most according to claim 2, it is characterised in that described electricity
Pressure conditioning output circuit by field effect transistor MOS, audion VT3, positive pole after resistance R8 with audion VT3
The polar capacitor C6 that emitter stage is connected, negative pole is connected with the cathode output end of diode rectifier U1,
The drain electrode with field effect transistor MOS after adjustable resistance R12 of N pole is connected, the P of P pole and diode D3
The Zener diode D5 that pole is connected, one end is connected with the positive pole of polar capacitor C6, the other end and voltage stabilizing
Inductance L2, the N pole that the N pole of diode D5 is connected after resistance R10 with the source of field effect transistor MOS
The diode D4 that pole is connected, P pole is connected with the base stage of audion VT3, negative pole and audion VT3
Colelctor electrode is connected, positive pole is connected with the grid of field effect transistor MOS polar capacitor C7, Yi Jizheng
Pole is sequentially connected through resistance R9 FB pin with control chip U2 after inductance L1, negative pole is through resistance
The polar capacitor C8 composition being connected with the adjustable end of adjustable resistance R12 after R11；Described Zener diode
The N pole of D5 is connected with the negative pole of polar capacitor C6；The grid of described field effect transistor MOS respectively with control
The VOUT pin of coremaking sheet U2 is connected with PWM pin, it drains the N pole with Zener diode D5
It is collectively forming the outfan of voltage conditioning output circuit.
A kind of light-operated LED Switching Power Supply the most according to claim 3, it is characterised in that described control
Coremaking sheet U2 is the integrated chip of L296.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524932.5A CN106028545A (en) | 2016-07-04 | 2016-07-04 | Light-operated LED switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524932.5A CN106028545A (en) | 2016-07-04 | 2016-07-04 | Light-operated LED switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106028545A true CN106028545A (en) | 2016-10-12 |
Family
ID=57107196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524932.5A Pending CN106028545A (en) | 2016-07-04 | 2016-07-04 | Light-operated LED switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106028545A (en) |
-
2016
- 2016-07-04 CN CN201610524932.5A patent/CN106028545A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |
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| WD01 | Invention patent application deemed withdrawn after publication |