CN206775775U - A kind of driving testing circuit of LED - Google Patents
A kind of driving testing circuit of LED Download PDFInfo
- Publication number
- CN206775775U CN206775775U CN201720441168.5U CN201720441168U CN206775775U CN 206775775 U CN206775775 U CN 206775775U CN 201720441168 U CN201720441168 U CN 201720441168U CN 206775775 U CN206775775 U CN 206775775U
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- circuit
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- chip microcomputer
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
It the utility model is related to a kind of driving testing circuit of LED, including the drive circuit and single-chip microcomputer detection circuit being connected respectively with LED；Described drive circuit includes antisurge protection module, EMI filtration modules, full-bridge rectification module, inverse-excitation type conversion module, output rectification filter module, current and voltage feedback feedback module and PWM controller；The utility model enables LED to obtain stable electric current, and produces highest output light flux.Meanwhile single-chip microcomputer detection circuit can realize the real-time monitoring to LED, so that LED drive circuit controls the size of LED current in the case where the factor such as input voltage and environment temperature changes in the best way.
Description
Technical field
Field of switch power is the utility model is related to, more particularly to a kind of driving testing circuit of LED.
Background technology
LED lamp by its low in energy consumption, long lifespan, brightness is high and green the characteristics of, overcome traditional fluorescent lamp,
The shortcomings that high energy consumptions such as incandescent lamp, short life, pollution environment, become the focus of research, gradually popularized in illumination market, but mesh
Preceding in the market has some LED drive powers with low quality, causes the reduction that LED overall circuit efficiencies are very low, heating is serious, serious
The efficiency and reliability of whole illuminator.In addition, LED in luminescence process, still has portion of energy conversion for heat energy, greatly
The heat-sinking capability of power LED, which turns into, influences one of its photoelectric properties and the key factor in life-span.Only resolving manufacturing technology
Under two major premises of drive circuit technology, LED product could more quickly develop.Research shows, the light decay of LED with
LED voltage, electric current are relevant with PN junction temperature, in the prior art, voltage, electricity also without a collection voltage stabilizing, current stabilization and LED
Road, temperature monitoring are in the LED electrical characteristic measure and control devices of one.
The content of the invention
In order to solve the above problems, the utility model purpose is to provide a kind of driving testing circuit of LED, solves existing
The voltage of LED driving power, electric current, temperature are unstable in technology, cause the problem of LED heating is serious, and luminous efficiency is low.
The technical solution of the utility model is：
A kind of driving testing circuit of LED, described driving testing circuit include the driving electricity being connected respectively with LED
Road and single-chip microcomputer detection circuit；
Described drive circuit includes antisurge protection module, EMI filtration modules, full-bridge rectification module, inverse-excitation type conversion
Module, output rectification filter module, current and voltage feedback feedback module and PWM controller；85V ~ 265V electric main access
Antisurge protection module, electric current is by entering EMI filtration modules after antisurge protection module；EMI filtration modules suppress following stage
Power circuit produce electromagnetic interference and enter utility grid, while prevent the electromagnetic interference of utility grid from entering late-class circuit；EMI
The alternating current of filtration module output is sent into inverse-excitation type conversion module after being made into DC current into full-bridge rectification module and carries out work(
Rate converts；DC current after inverse-excitation type conversion module power conversion is output to LED string after output rectification filter module；Institute
The DC current that output rectification filter module exports is fed back to PWM controller, PWM controls by the current and voltage feedback feedback module stated
Device processed is sent into inverse-excitation type conversion module and carries out copped wave according to the feedback signal output pwm signal of DC current, pwm signal, finally
To LED output constant current electric current；
Described single-chip microcomputer detection circuit includes single chip machine controlling circuit and the voltage being connected with single chip machine controlling circuit inspection
Slowdown monitoring circuit, current detection circuit and temperature sensing circuit, the external LCD display of single-chip microcomputer.
Described single chip machine controlling circuit includes single-chip microcomputer U7, crystal oscillator, reset circuit and JTAG download interfaces.
Described voltage detecting circuit includes the voltage detecting potential-divider network being made up of resistance R24, R25, R27, R39, point
Pressure network network will be defeated AD conversion input port PA1, single-chip microcomputer U7 that single-chip microcomputer U7 is sent into after the output voltage partial pressure of drive circuit
Go out photovoltaic conversion to be handled for digital quantity；AD conversion input port PA1 the first clamp circuits of connection avoid voltage overshoot, and first
Clamp circuit is made up of diode D12, D14.
Described current detection circuit includes current amplification circuit and current sampling resistor R15；Current amplification circuit is by transporting
Calculate amplifier U1；Peripheral resistance R3, R4, R9 and R11；Electric capacity C2, C3 and C11 are formed；The output current warp of the drive circuit
Current sampling resistor R15 switchs to voltage signal, after being sent into current amplification circuit amplification, the RC filter circuits through R51, C34 composition
After filtering, single-chip microcomputer U7 AD conversion input port PA2 is sent into, is converted into digital quantity processing, PA2 ports connection the second clamp electricity
Road, the second clamp circuit are made up of diode D11, D13.
Described temperature sensing circuit includes thermistor R40, resistance R31 and electric capacity C19；With temperature change, R40 and
The magnitude of voltage that R31 forms temperature detection potential-divider network changes, and the magnitude of voltage is sent into single-chip microcomputer U7 AD conversion input port
PA0, it is converted into digital quantity processing.
Described single-chip microcomputer model ATmegal16L, single-chip microcomputer are configured with Asynchronous Serial Interface.
The beneficial effects of the utility model：
1. drive circuit of the present utility model uses voltage, electric current double control ring parallel-connection structure, current and voltage feedback feedback
Circuit is made up of operational amplifier U4, C24, R46, C15, R22, D7, and R45, R44, R43, R47 and voltage-stabiliser tube U5 form voltage base
Quasi- circuit, voltage reference is provided to the closed-loop feedback circuit that operational amplifier U4 is formed.U4B forms current feedback circuit, U4A structures
Into voltage feedback loop.Current sampling resistor R15 samples the electric current of LED, is sent into U4B, U4B outputs are by diode D7 to light
Current error signal is sent into PWM controller U13 by coupling U2, forms closed-loop current control, exports constant current driven LED point
It is bright.Resistance R5, R10 are sent to U4A to being added in after the voltage of LED, then by diode D7 to optocoupler U2, voltage error
Signal is sent into PWM controller U13, forms voltage close loop control.LED needs constant current driven during normal work, now electric current
Ring carries out closed-loop control so that driver output constant current drives LED steady illumination；When LED string is opened a way, it is added on LED
Voltage can raise, now Voltage loop is controlled so that the voltage constant pressure being added on LED, pass through voltage and current feedback control
Loop processed realizes the constant current voltage limiting control of driver.So as to improve the constant current of controller, the precision of voltage regulation.
2. single-chip microcomputer detection circuit of the present utility model realizes the real-time prison of the voltage to LED, circuit and temperature
Survey, the development to LED drive power provides reliable data reference.
3. there is good practical value and application prospect by emulation and experimental verification, device of the present utility model.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model drive circuit；
Fig. 2 is the circuit diagram of the utility model single chip machine controlling circuit；
Fig. 3 is the circuit diagram of the utility model voltage detecting circuit；
Fig. 4 is the circuit diagram of the utility model current detection circuit；
Fig. 5 is the circuit diagram of the utility model temperature sensing circuit；
Embodiment
The utility model is further detailed below in conjunction with the accompanying drawings, referring to a kind of LED described in Fig. 1-Fig. 5
Driving testing circuit, described driving testing circuit include the drive circuit and single-chip microcomputer detection circuit being connected respectively with LED；
Referring to Fig. 1, described drive circuit includes antisurge protection module, EMI filtration modules, full-bridge rectification module, inverse-excitation type conversion
Module, output rectification filter module, current and voltage feedback feedback module and PWM controller.85V ~ 265V electric mains are logical first
Enter EMI filtration modules after crossing antisurge protection module, electromagnetic interference caused by module suppression rear class power circuit passes through electricity
Source line interference power network, while prevent the electromagnetic interference of power network from entering late-class circuit through power line；The alternating voltage of EMI outputs enters
Full-bridge rectification module is made into direct current and is sent into inverse-excitation type conversion module progress power conversion；Through defeated after the output of high frequency transformer secondary
Go out output current after rectification filtering module；Current and voltage feedback feedback module, should output voltage current feedback to PWM controller
Controller according to feedback of voltage and current signal output pwm signal, be sent into inverse-excitation type conversion module and carry out copped wave, final defeated by the signal
Go out continuous current driving LED illumination.
Described single-chip microcomputer detection circuit includes single chip machine controlling circuit and the voltage being connected with single chip machine controlling circuit inspection
Slowdown monitoring circuit, current detection circuit and temperature sensing circuit, the external LCD display of single-chip microcomputer, single-chip microcomputer detection circuit mainly pass through
Voltage, electric current and the temperature data of sensor real-time sampling high-powered LED lamp, and voltage, electric current and temperature data is real-time
Display on an lcd display, is intuitively read, to adjust at any time for live.
Described single-chip microcomputer detection circuit includes single chip machine controlling circuit and the voltage being connected with single chip machine controlling circuit inspection
Slowdown monitoring circuit, current detection circuit and temperature sensing circuit, the external LCD display of single-chip microcomputer.
Described single chip machine controlling circuit includes single-chip microcomputer U7, crystal oscillator, reset circuit and JTAG download interfaces.
Described voltage detecting circuit includes the voltage detecting potential-divider network being made up of resistance R24, R25, R27, R39, point
Pressure network network will be defeated AD conversion input port PA1, single-chip microcomputer U7 that single-chip microcomputer U7 is sent into after the output voltage partial pressure of drive circuit
Go out photovoltaic conversion to be handled for digital quantity；To prevent output voltage overshoot from causing Chip Microcomputer A/D port to damage, AD conversion input
Port PA1 the first clamp circuits of connection, the first clamp circuit are made up of diode D12, D14.
Described current detection circuit includes current amplification circuit and current sampling resistor R15；Current amplification circuit is by transporting
Calculate amplifier U1；Peripheral resistance R3, R4, R9 and R11；Electric capacity C2, C3 and C11 are formed；The output current warp of the drive circuit
Current sampling resistor R15（0.22R/2W）Switch to voltage signal（Due to R15 resistance very littles, its voltage dividing ability can be neglected）,
After being sent into current amplification circuit amplification, after the RC filter circuits filtering formed through R51, C34, the AD conversion for being sent into single-chip microcomputer U7 is defeated
Inbound port PA2, be converted into digital quantity processing, PA2 ports connect the second clamp circuit, the second clamp circuit by diode D11,
D13 is formed.
Described temperature sensing circuit includes thermistor R40, resistance R31 and electric capacity C19；With temperature change, R40 and
The magnitude of voltage that R31 forms temperature detection potential-divider network changes, and the magnitude of voltage is sent into single-chip microcomputer U7 AD conversion input port
PA0, it is converted into digital quantity processing.
The other models of ATmegal16L or functionally similar can be selected in described single-chip microcomputer model, and single-chip microcomputer is to LED
The real-time monitoring of voltage, circuit and temperature.Single-chip microcomputer is configured with Asynchronous Serial Interface, can be LED voltage, the electricity detected
Stream and temperature signal are sent into computer and handled, and can also be supplied voltage, electric current and temperature data real-time display on the lcd screen
Live reading directly perceived, to adjust at any time.
The utility model is powered using inverse-excitation type switch power-supply for great power LED, it is contemplated that the line voltage of various countries is not to the utmost
It is identical, and requirement of the various countries to the safety standard of electrical equipment is different, and design employs Width funtion（85V~265V）Input.LED
The characteristics of electrical characteristic measure and control device is and is directed to LED develops a series of constant pressure and flow control electronic circuits, and electricity is driven by LED constant current
Road and single-chip microcomputer detection circuit two parts composition, LED input current is controlled in optimum amounts of current using integrated circuit technique,
Enable LED to obtain stable electric current, and produce highest output light flux.Meanwhile single-chip microcomputer detection circuit can be realized to LED
The real-time monitoring of lamp, so as to LED drive circuit in the case where the factor such as input voltage and environment temperature changes with optimal
Mode controls the size of LED current.
Claims (6)
- A kind of 1. driving testing circuit of LED, it is characterised in that：Described driving testing circuit include respectively with LED phase Drive circuit and single-chip microcomputer detection circuit even；Described drive circuit includes antisurge protection module, EMI filtration modules, full-bridge rectification module, inverse-excitation type and becomes mold changing Block, output rectification filter module, current and voltage feedback feedback module and PWM controller；85V ~ 265V electric main access is anti- Surge protection module, electric current is by entering EMI filtration modules after antisurge protection module；EMI filtration modules suppress following stage Power circuit produces electromagnetic interference and enters utility grid, while prevents the electromagnetic interference of utility grid from entering late-class circuit；EMI is filtered The alternating current of ripple module output is sent into inverse-excitation type conversion module after being made into DC current into full-bridge rectification module and carries out power Conversion；DC current after inverse-excitation type conversion module power conversion is output to LED string after output rectification filter module；It is described Current and voltage feedback feedback module the DC current that output rectification filter module exports is fed back to PWM controller, PWM controls Device is sent into inverse-excitation type conversion module and carries out copped wave according to the feedback signal output pwm signal of DC current, pwm signal, finally to LED output constant current electric current；Described single-chip microcomputer detection circuit includes single chip machine controlling circuit and the voltage detecting being connected with single chip machine controlling circuit electricity Road, current detection circuit and temperature sensing circuit, the external LCD display of single-chip microcomputer.
- 2. the driving testing circuit of LED according to claim 1, it is characterised in that：Described single chip machine controlling circuit Including single-chip microcomputer U7, crystal oscillator, reset circuit and JTAG download interfaces.
- 3. the driving testing circuit of LED according to claim 1 or 2, it is characterised in that：Described voltage detecting circuit Including the voltage detecting potential-divider network being made up of resistance R24, R25, R27, R39, output voltage of the potential-divider network drive circuit Single-chip microcomputer U7 AD conversion input port PA1 is sent into after partial pressure, output voltage is converted into digital quantity and handled by single-chip microcomputer U7； AD conversion input port PA1 the first clamp circuits of connection avoid voltage overshoot, and the first clamp circuit is by diode D12, D14 group Into.
- 4. the driving testing circuit of LED according to claim 3, it is characterised in that：Described current detection circuit bag Include current amplification circuit and current sampling resistor R15；Current amplification circuit is by operational amplifier U1；Peripheral resistance R3, R4, R9 and R11；Electric capacity C2, C3 and C11 are formed；The output current of the drive circuit switchs to voltage signal through current sampling resistor R15, send After entering current amplification circuit amplification, after the RC filter circuits filtering formed through R51, C34, single-chip microcomputer U7 AD conversion input is sent into Port PA2, digital quantity processing is converted into, PA2 ports connect the second clamp circuit, and the second clamp circuit is by diode D11, D13 Composition.
- 5. the driving testing circuit of LED according to claim 4, it is characterised in that：Described temperature sensing circuit bag Include thermistor R40, resistance R31 and electric capacity C19；With temperature change, the electricity of R40 and R31 composition temperature detection potential-divider networks Pressure value changes, and the magnitude of voltage is sent into single-chip microcomputer U7 AD conversion input port PA0, is converted into digital quantity processing.
- 6. the driving testing circuit of LED according to claim 5, it is characterised in that：Described single-chip microcomputer model ATmegal16L, single-chip microcomputer are configured with Asynchronous Serial Interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720441168.5U CN206775775U (en) | 2017-04-25 | 2017-04-25 | A kind of driving testing circuit of LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720441168.5U CN206775775U (en) | 2017-04-25 | 2017-04-25 | A kind of driving testing circuit of LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206775775U true CN206775775U (en) | 2017-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720441168.5U Expired - Fee Related CN206775775U (en) | 2017-04-25 | 2017-04-25 | A kind of driving testing circuit of LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206775775U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107041035A (en) * | 2017-04-25 | 2017-08-11 | 西安工业大学 | The measure and control device of LED electrical characteristic |
| CN108980093A (en) * | 2018-07-27 | 2018-12-11 | 青岛斑科变频技术有限公司 | A kind of blower drive module for air-conditioning |
| CN110881232A (en) * | 2019-12-17 | 2020-03-13 | 深圳市太美亚电子科技有限公司 | Flyback switching power supply circuit |
-
2017
- 2017-04-25 CN CN201720441168.5U patent/CN206775775U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107041035A (en) * | 2017-04-25 | 2017-08-11 | 西安工业大学 | The measure and control device of LED electrical characteristic |
| CN108980093A (en) * | 2018-07-27 | 2018-12-11 | 青岛斑科变频技术有限公司 | A kind of blower drive module for air-conditioning |
| CN110881232A (en) * | 2019-12-17 | 2020-03-13 | 深圳市太美亚电子科技有限公司 | Flyback switching power supply circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20210425 |