CN206894943U - A kind of high-power LED driving power source - Google Patents
A kind of high-power LED driving power source Download PDFInfo
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- CN206894943U CN206894943U CN201720183418.XU CN201720183418U CN206894943U CN 206894943 U CN206894943 U CN 206894943U CN 201720183418 U CN201720183418 U CN 201720183418U CN 206894943 U CN206894943 U CN 206894943U
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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 utility model provides a kind of high-power LED driving power source, including main circuit and control circuit；Main circuit includes input rectification filtering unit, upper and lower switching tube, capacitance, transformer and the output end rectification filtering unit being sequentially connected；Wherein, input rectification filtering unit is single capacitor half-bridge structure, upper switch pipe T1 drain electrode and lower switch pipe T2 source electrode connect the output end of input rectification filtering unit respectively, capacitance Cb is located between lower switch pipe T2 and transformer T primary side, and output end rectification filtering unit is the full-wave rectifying circuit of connection transformer T secondary sides；Control circuit includes PWM generation circuits, drive circuit and loop compensation circuit.LED drive power of the present utility model, without high-power electrochemical capacitor, long lifespan, small volume, output is stable, driving effect is good, suitable for the driving of high-power LED light source, has good practicality and market prospects.
Description
Technical field
It the utility model is related to LED technology field, and in particular to a kind of high-power LED driving power source.
Background technology
LED has energy-saving and environmental protection, long lifespan, rich in color etc. as a kind of new light sources compared with original lighting source
Advantage, its various advantage having promote the development in LED markets.Using during LED illumination, it is necessary to have supporting driving power come
Drive LED.LED drive power in the market contains electrochemical capacitor mostly, limits the life-span advantage of LED light source.Meanwhile
Existing LED drive power, only tens watts mostly of its power, can not meet the place such as factory, square needs great power LED light
The demand in source.Therefore, it is necessary to develop a kind of high-power LED driving power source of no electrolytic capacitor to meet the demand.
Utility model content
The utility model solve technical problem be to provide a kind of high-power LED driving power source of no electrolytic capacitor, with
Meet the demand in the place of needs high-power LED illuminating light source.
In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：
A kind of high-power LED driving power source, including main circuit and control circuit；The main circuit is defeated including being sequentially connected
Enter to hold rectification filtering unit, upper and lower switching tube, capacitance, transformer and output end rectification filtering unit；Wherein, input is whole
Stream filter unit is the single capacitor half-bridge structure that is made up of commutation diode D1-D6, electric capacity C1, upper switch pipe T1 drain electrode and under
The source electrode of switch transistor T 2 connects the output end of input rectification filtering unit, upper switch pipe T1 source electrode and lower switch pipe T2 respectively
Drain electrode connection, capacitance Cb be located between lower switch pipe T2 and transformer T primary side, output end rectification filtering unit connect
Connect transformer T secondary side, the full-wave rectifying circuit being specially made up of diode D7, D8, inductance L and electric capacity C2；
The control circuit includes PWM generation circuits, drive circuit and loop compensation circuit, and the PWM generation circuits will
Analog signal is converted into the pwm signal of fixed cycle, and the drive circuit connects switching tube up and down, for pwm signal to be changed
For the drive signal of upper and lower switching tube, the loop compensation circuit is used for system balance.
Further, the drive circuit includes integrated drive chips IR, resistance R1, R2, electric capacity C3, C4, diode D9-
D11；Wherein, integrated drive chips IR VDD and VCC pin connect 15V power supplies, Hin and Lin pin receive PWM and produce electricity respectively
The low and high level signal of road output, SD, VSS and COM pin ground connection；IR HO pin connection resistance R1 one end and bearing for diode D9
Pole, the resistance R1 other end connect the grid of the upper switch pipe T1 with diode D9 positive pole；IR VB pin connection electric capacity C3
One end and diode D10 negative pole, electric capacity C3 the other end connection IR VS pin and switch transistor T 1 source electrode；IR VCC pin
Connect diode D10 positive pole and electric capacity C4 one end, electric capacity C4 other end ground connection；IR LO pin connection resistance R2 one end
With diode D11 negative pole, the resistance R2 other end connects lower switch pipe T2 grid with diode D11 positive pole.
Further, the loop compensation circuit includes current compensation network and voltage compensation network；Wherein, the electric current
Compensating network includes resistance R3-R12, Rs, electric capacity C5-C10, optocoupler OPT1, amplifier U1, U2 and the first source of stable pressure；Inductance L2
One end connection 15V power supplies, other end connection electric capacity C5 one end and optocoupler OPT1 4 pin；Optocoupler OPT1 1 pin connects
15V power supplies, 2 pin connecting resistance R4 one end, 3 pin connecting resistance R3 one end and feedback signal output FB；Resistance R4's is another
One end connects 3 pin of electric capacity C6, C7 and the first source of stable pressure, electric capacity C6 other end connection resistance R7 one end and amplifier U1's
End of oppisite phase, resistance R7 other end connection electric capacity C9 one end and amplifier U1 output end；Resistance R6 one end connection 15V is supplied
Power supply, other end connection resistance R8, electric capacity C8 one end and amplifier U1 in-phase end；Electric capacity C9 other end connection resistance
R9 one end, resistance R9 other end connection resistance R11, R12, electric capacity C10 one end and amplifier U2 end of oppisite phase；Resistance
R10 one end and amplifier U2 output end are clicked and entered in R11 other end connection, and resistance R10 other end connection electric capacity C7's is another
One end and 1 pin of the first source of stable pressure；Amplifier U2 in-phase end connection sample rate current input and resistance Rs one end；Resistance
R3, R8, R12, Rs, the 2 pin ground connection of electric capacity C5, C8, C10 and the first source of stable pressure.
Further, the voltage compensation network includes resistance R13-R17, electric capacity C11-C13 and the second source of stable pressure；Resistance
3 pin of R13 one end connection optocoupler OPT1 2 pin, other end connection resistance R14, electric capacity C11 and the second source of stable pressure, resistance R14
One end connection electric capacity C12 one end, electric capacity the C11 other end connection resistance R15, R16, R17 one end, the second source of stable pressure
The other end of 1 pin and electric capacity C12；Resistance R15 other end connection sampled voltage input and electric capacity C13 one end, electric capacity C13
Other end connection resistance R16 the other end, 2 pin that the resistance R17 other end connects the second source of stable pressure are simultaneously grounded.
The beneficial effects of the utility model：The input rectification filtering unit of main circuit uses single capacitor half-bridge structure, with
Traditional double electric capacity half-bridge circuits are compared less with a capacitance, reduce cost, and preferably open for having during LED drivings
Dynamic characteristic.Output end rectification filtering unit uses full-wave rectification structure, reduces commutation diode usage quantity, small volume and into
This is low.Driving circuit structure is simple and driving effect is good, and with reference to loop compensation circuit, the driving to LED is more stable.This practicality is new
The LED drive power of type, without high-power electrochemical capacitor, long lifespan, small volume, output is stable, driving effect is good, suitable for big
The driving of power LED light source, there is good practicality and market prospects.
Brief description of the drawings
Fig. 1 is the module connection diagram of high-power LED driving power source of the present utility model.
Fig. 2 is the circuit diagram of main circuit in Fig. 1 embodiments.
Fig. 3 is the circuit diagram of drive circuit in Fig. 1 embodiments.
Fig. 4 is the circuit diagram of the current compensation network of Fig. 1 embodiment intermediate ring road compensation circuits.
Fig. 5 is the circuit diagram of the voltage compensation network of Fig. 1 embodiment intermediate ring road compensation circuits.
Embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched with reference to embodiment
State, but it is to be understood that these descriptions are simply further explanation feature and advantage of the present utility model, rather than to this practicality
The limitation of new claim.
As shown in figure 1, in order to meet the needs of high-power LED light source drive circuit, the utility model devises a kind of big
Power LED driving power, including main circuit and control circuit；Control circuit includes being used for the driving for driving switching tube in main circuit
Circuit, the PWM generation circuits for controlling drive circuit, and mended for carrying out the loop that Current Voltage compensates in system loop
Repay circuit.
Specifically, as shown in Fig. 2 main circuit include be sequentially connected input rectification filtering unit, upper and lower switching tube, every
Straight electric capacity, transformer and output end rectification filtering unit.Wherein, input rectification filtering unit is single capacitor half-bridge structure, by
Commutation diode D1-D6, electric capacity C1 are formed.Switching tube selects high-power MOS tube, upper switch pipe T1 drain electrode and lower switch pipe T2
Source electrode connect the output end of input rectification filtering unit respectively, the drain electrode of upper switch pipe T1 source electrode and lower switch pipe T2 connects
Connect, capacitance Cb is located between lower switch pipe T2 and transformer T primary side, output end rectification filtering unit connection transformer
T secondary side, the full-wave rectifying circuit being specially made up of diode D7, D8, inductance L and electric capacity C2.
Using foregoing circuit, solve electrochemical capacitor and have a strong impact on the LED drive power life-span, and existing individual event electricity is defeated
The shortcomings that no electrolytic capacitor LED drive power entered is because containing the power frequency stroboscopic for making one kopiopia.Meanwhile using the half of single capacitor
Bridge structure, volume, cost when solving input voltage high and no electrolytic capacitor, moire problems.
PWM generation circuits are used for the pwm signal that analog signal is converted into the fixed cycle, are in existing LED drive circuit
Conventional component, its particular circuit configurations is more ripe, does not elaborate herein.
Switching tube above and below drive circuit connection, for pwm signal to be converted to the drive signal of upper and lower switching tube.Specifically
, as shown in figure 3, drive circuit includes integrated drive chips IR, resistance R1, R2, electric capacity C3, C4, diode in the present embodiment
D9-D11.Wherein, integrated drive chips IR selects IR2113, and itself VDD and VCC pin connects 15V power supplies, Hin and Lin pin difference
Receive the low and high level signal of PWM generation circuits output, SD, VSS and COM pin ground connection；IR HO pin connection resistance R1 one end
With diode D9 negative pole, the resistance R1 other end connects upper switch pipe T1 grid with diode D9 positive pole；IR VB pin
Connect electric capacity C3 one end and diode D10 negative pole, electric capacity C3 other end connection IR VS pin and the source electrode of switch transistor T 1；
IR VCC pin connection diode D10 positive pole and electric capacity C4 one end, electric capacity C4 other end ground connection；IR LO pin connection electricity
R2 one end and diode D11 negative pole are hindered, the resistance R2 other end connects lower switch pipe T2 grid with diode D11 positive pole
Pole.
In the utility model, for LED load characteristic, network and voltage compensation network are compensated by design current, it is real
The constant current drive mode of suitable LED accurate pressure limiting is showed.
Specifically, as shown in figure 4, current compensation network includes resistance R3-R12, Rs, electric capacity C5-C10, optocoupler OPT1, put
Big device U1, U2 and the first source of stable pressure.Inductance L2 one end connection 15V power supplies, other end connection electric capacity C5 one end and light
Coupling OPT1 4 pin；Optocoupler OPT1 1 pin connects 15V power supplies, 2 pin connecting resistance R4 one end, 3 pin connecting resistance R3 one end and
Feedback signal output FB；Resistance R4 other end connection electric capacity C6, C7 and 3 pin of the first source of stable pressure, the electric capacity C6 other end
Connect resistance R7 one end and amplifier U1 end of oppisite phase, resistance R7 other end connection electric capacity C9 one end and amplifier U1's
Output end；Resistance R6 one end connection 15V power supplies, the other end connect resistance R8, electric capacity C8 one end and amplifier U1
In-phase end；Electric capacity C9 other end connection resistance R9 one end, resistance R9 other end connection resistance R11, R12, electric capacity C10
One end and amplifier U2 end of oppisite phase；R10 one end and amplifier U2 output end, electricity are clicked and entered in resistance R11 other end connection
Hinder the R10 other end connection electric capacity C7 other end and 1 pin of the first source of stable pressure；Amplifier U2 in-phase end connection sample rate current
One end of input and resistance Rs；Resistance R3, R8, R12, Rs, the 2 pin ground connection of electric capacity C5, C8, C10 and the first source of stable pressure.
As shown in figure 5, voltage compensation network includes resistance R13-R17, electric capacity C11-C13 and the second source of stable pressure；Resistance R13
One end connection optocoupler OPT1 2 pin, 3 pin of other end connection resistance R14, electric capacity C11 and the second source of stable pressure, resistance R14's
One end connection electric capacity C12 one end, electric capacity the C11 other end connection resistance R15, R16, R17 one end, the 1 of the second source of stable pressure
The other end of pin and electric capacity C12；Resistance R15 other end connection sampled voltage input and electric capacity C13 one end, electric capacity C13
Other end connection resistance R16 the other end, 2 pin that the resistance R17 other end connects the second source of stable pressure are simultaneously grounded.
Preferably, in foregoing circuit, the first source of stable pressure and the second source of stable pressure use TL431 type controllable accurate source of stable pressure.
The explanation of above example is only intended to help and understands method and its core concept of the present utility model.It should refer to
Go out, for those skilled in the art, can also be to this on the premise of the utility model principle is not departed from
Utility model carries out some improvement and modification, and these are improved and modification also falls into the protection domain of the utility model claims
It is interior.
Claims (4)
- A kind of 1. high-power LED driving power source, it is characterised in that：Including main circuit and control circuit；The main circuit include according to Input rectification filtering unit, upper and lower switching tube, capacitance, transformer and the output end rectification filtering unit of secondary connection；Its In, input rectification filtering unit is the single capacitor half-bridge structure that is made up of commutation diode D1-D6, electric capacity C1, upper switch pipe T1 drain electrode and lower switch pipe T2 source electrode connect the output end of input rectification filtering unit, upper switch pipe T1 source electrode respectively Drain electrode with lower switch pipe T2 is connected, and capacitance Cb is located between lower switch pipe T2 and transformer T primary side, and output end is whole Flow filter unit connection transformer T secondary side, the full-wave rectification being specially made up of diode D7, D8, inductance L and electric capacity C2 Circuit；The control circuit includes PWM generation circuits, drive circuit and loop compensation circuit, and the PWM generation circuits will simulate Signal is converted into the pwm signal of fixed cycle, and the drive circuit connects switching tube up and down, for pwm signal to be converted to The drive signal of lower switch pipe, the loop compensation circuit are used for system balance.
- 2. high-power LED driving power source as claimed in claim 1, it is characterised in that：The drive circuit includes integrated driving Chip I R, resistance R1, R2, electric capacity C3, C4, diode D9-D11；Wherein, integrated drive chips IR VDD and VCC pin meet 15V Power supply, Hin and Lin pin receive the low and high level signal of PWM generation circuits output, SD, VSS and COM pin ground connection respectively；IR HO pin connection resistance R1 one end and diode D9 negative pole, described in the resistance R1 other end connects with diode D9 positive pole Upper switch pipe T1 grid；IR VB pin connection electric capacity C3 one end and diode D10 negative pole, electric capacity C3 other end connection IR VS pin and the source electrode of switch transistor T 1；IR VCC pin connection diode D10 positive pole and electric capacity C4 one end, electric capacity C4's The other end is grounded；IR LO pin connection resistance R2 one end and diode D11 negative pole, resistance the R2 other end and diode D11 positive pole connection lower switch pipe T2 grid.
- 3. high-power LED driving power source as claimed in claim 1 or 2, it is characterised in that：The loop compensation circuit includes electricity Stream compensation network and voltage compensation network；Wherein, the current compensation network includes resistance R3-R12, Rs, electric capacity C5-C10, light Coupling OPT1, amplifier U1, U2 and the first source of stable pressure；Inductance L2 one end connection 15V power supplies, other end connection electric capacity C5's One end and optocoupler OPT1 4 pin；Optocoupler OPT1 1 pin meets 15V power supplies, 2 pin connecting resistance R4 one end, 3 pin connecting resistance R3 One end and feedback signal output FB；Resistance R4 other end connection electric capacity C6, C7 and 3 pin of the first source of stable pressure, electric capacity C6 Other end connection resistance R7 one end and amplifier U1 end of oppisite phase, resistance R7 other end connection electric capacity C9 one end and put Big device U1 output end；Resistance R6 one end connection 15V power supplies, other end connection resistance R8, electric capacity C8 one end and put Big device U1 in-phase end；Electric capacity C9 other end connection resistance R9 one end, resistance R9 other end connection resistance R11, R12, Electric capacity C10 one end and amplifier U2 end of oppisite phase；R10 one end and amplifier U2 are clicked and entered in resistance R11 other end connection Output end, resistance the R10 other end connection electric capacity C7 other end and 1 pin of the first source of stable pressure；Amplifier U2 in-phase end connects Connect sample rate current input and resistance Rs one end；Resistance R3, R8, R12, Rs, the 2 of electric capacity C5, C8, C10 and the first source of stable pressure Pin is grounded.
- 4. high-power LED driving power source as claimed in claim 3, it is characterised in that：The voltage compensation network includes resistance R13-R17, electric capacity C11-C13 and the second source of stable pressure；Resistance R13 one end connection optocoupler OPT1 2 pin, other end connection resistance R14, electric capacity C11 and the second source of stable pressure 3 pin, resistance R14 one end connection electric capacity C12 one end, the electric capacity C11 other end connect The other end of connecting resistance R15, R16, R17 one end, 1 pin of the second source of stable pressure and electric capacity C12；Resistance R15 other end connection One end of sampled voltage input and electric capacity C13, the electric capacity C13 other end connection resistance R16 other end, resistance R17's is another One end connects 2 pin of the second source of stable pressure and is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183418.XU CN206894943U (en) | 2017-02-28 | 2017-02-28 | A kind of high-power LED driving power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183418.XU CN206894943U (en) | 2017-02-28 | 2017-02-28 | A kind of high-power LED driving power source |
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| Publication Number | Publication Date |
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| CN206894943U true CN206894943U (en) | 2018-01-16 |
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| CN201720183418.XU Expired - Fee Related CN206894943U (en) | 2017-02-28 | 2017-02-28 | A kind of high-power LED driving power source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954299A (en) * | 2017-02-28 | 2017-07-14 | 衢州职业技术学院 | A kind of high-power LED driving power source |
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2017
- 2017-02-28 CN CN201720183418.XU patent/CN206894943U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954299A (en) * | 2017-02-28 | 2017-07-14 | 衢州职业技术学院 | A kind of high-power LED driving power source |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 Termination date: 20190228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |