CN209375986U - A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument - Google Patents
A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument Download PDFInfo
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- CN209375986U CN209375986U CN201822159912.XU CN201822159912U CN209375986U CN 209375986 U CN209375986 U CN 209375986U CN 201822159912 U CN201822159912 U CN 201822159912U CN 209375986 U CN209375986 U CN 209375986U
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- ultraviolet led
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Abstract
The utility model discloses a kind of high pressure deep ultraviolet LED light constant-current drive circuits that can be used for measuring instrument, it includes single-unit lithium polymer battery, voltage-stablizer, microcontroller, total line device, driver, deep ultraviolet LED light, the single-unit lithium polymer battery and voltage-stablizer are electrically connected, the voltage-stablizer is electrically connected with microcontroller, total line device, driver respectively, and the driver and deep ultraviolet LED light are electrically connected.This can be used for the high pressure deep ultraviolet LED light constant-current drive circuit of measuring instrument, use and is exclusively used in driving the integrated IC of camera flash-light as the driving chip of deep ultraviolet LED light, can efficiently, stabilized driving high pressure deep ultraviolet LED light, power consumption control is better than traditional scheme, temperature-compensating is easy, strong antijamming capability, driving current control precision are high, and longtime running driving current consistency is preferable.
Description
Technical field
The utility model relates to measuring instrument technical field, specially a kind of high pressure deep ultraviolet that can be used for measuring instrument
LED light constant-current drive circuit.
Background technique
In common detection device and measuring instrument, measurement to a variety of chemical parameters is needed using to high pressure deep ultraviolet
LED light-emitting component (DUV) is used as light source.It compared to traditional LED light, successfully to excite and stabilized driving deep ultraviolet LED, need
Want higher driving voltage and excitation energy.The driving voltage of general such deep ultraviolet LED element is up to 7~9V, uses at present
Common LED driving integrated chip can only provide the driving voltage of highest 5V, can not work normally.
In common two kinds of traditional schemes, one of them is that IC is driven using dedicated DUV, and another kind is to select high pressure
MOS power device voluntarily build entire driving circuit.
In the traditional scheme using dedicated driving IC, the dedicated driving IC volume of DUV is excessive, expensive and static
Power consumption is higher, is not suitable for being applied to small size, in the equipment of sensitive power consumption.
In using the scheme for voluntarily building driving circuit, due to the discrete layout of various electronic components, so that circuit body
Product is larger；Discrete component must have exposed connection line, and circuit can be made to be readily incorporated interference, make the driving electricity of equipment
Stream error finally influences the stability of photoluminescence of light source；The problem that excessive discrete original part be easy to cause temperature drift inconsistent, makes
Integrated circuit is extremely difficult when doing temperature-compensating, the final accuracy for influencing driving current；It is built using independent metal-oxide-semiconductor
Driving circuit can not accomplish the internal resistance for being accurately controlled high and low side metal-oxide-semiconductor, certainly will will affect the driving current one when product volume produces
Cause property；Constant current output is driven using independent MOS pipe, needs to be accurately controlled the conducting of metal-oxide-semiconductor, and is needed with higher
Acquisition rate monitoring output electric current responds compensation and can be only achieved the control precision of integrated IC, this needs to expend microcontroller volume
Outer resource is not suitable in sensitive power consumption and the limited system of process resource.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of high pressure deep ultraviolet LED that can be used for measuring instrument
There is lamp constant-current drive circuit temperature-compensating to be easy, strong antijamming capability, driving current control precision are high, advantage at low cost.
In order to achieve the above object, the utility model is achieved by the following technical programs:
A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument comprising: single-unit lighium polymer electricity
Pond, voltage-stablizer, microcontroller, total line device and driver；
Wherein, single-unit lithium polymer battery provides power supply for driving circuit, and when needing measuring instrument, the single-unit lithium is poly-
Object battery is closed to access in the circuit system of measuring appratus to be measured；
The single-unit lithium polymer battery is connect with the voltage-stablizer, and the voltage-stablizer exports three road low ripples
3.3VDC DC power supply is respectively to microcontroller, total line device, driver；
And the IIC data line of the microcontroller is linked into driver via total line device；The LED of driver drives output
End is linked into the positive and negative end of deep ultraviolet LED light.
Preferred: the voltage-stablizer is DCDC voltage-stablizer, and total line device is iic bus device.
In order to drive concatenated two pieces of high-power LED flashlights to design, therefore its output end voltage can be up to 9V,
And drive deep ultraviolet LED light, it is desirable to provide much higher than 6~9V driving voltage of common LED, the driver of the application is selected
It is exclusively used in the integrated LM355x family chip of driving camera flash.
The application uses common low-voltage flash lamp driving chip, by the mode for two pieces of LED driving of connecting in the prior art
It is changed to one piece of DUV lamp of driving, therefore the quantity of deep ultraviolet LED light described herein is one.
The utility model provides a kind of high pressure deep ultraviolet LED light constant-current drive circuit that can be used for measuring instrument.Have
Below the utility model has the advantages that
The present invention will be specific to driving chip of the integrated IC of driving camera flash-light as deep ultraviolet LED light, Ke Yigao
Effect, stabilized driving high pressure deep ultraviolet LED light, power consumption control be better than traditional scheme, temperature-compensating be easy, strong antijamming capability, drive
It is high that streaming current controls precision, and longtime running driving current consistency is preferable, and circuit area can be controlled in 7*8mm2Within, driving
Current control accuracy is high, and long-time service driving current consistency is preferable, meets the depth as general measure equipment and detecting instrument
The performance indicator of ultraviolet source driving circuit, integrated circuit area occupancy is minimum, is very suitable to small light COD detection device,
Cost is relatively low, is highly suitable for cost-sensitive equipment or changes to original circuit upgrading for needing DUV apparatus of driving light source
Generation.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
In figure: 1 single-unit lithium polymer battery, 2 voltage-stablizers, 3 microcontrollers, 4 total line devices, 5 drivers, 6 deep ultraviolet LED
Lamp.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, purport
It is being used to explain the utility model, and should not be understood as limiting the present invention.
Referring to Fig. 1, the utility model provides a kind of technical solution: a kind of high pressure deep ultraviolet can be used for measuring instrument
LED light constant-current drive circuit, including single-unit lithium polymer battery 1, voltage-stablizer 2, microcontroller 3, total line device 4, driver 5, depth
Ultraviolet LED lamp 6, voltage-stablizer 2 are DCDC voltage-stablizer, and total line device 4 is iic bus device, and driver 5 is LM355x driver, single-unit
Lithium polymer battery 1 and voltage-stablizer 2 are electrically connected, and it is steady that single-unit lithium polymer battery 1 is used as power supply supply to be directly connected to DCDC
Depressor, voltage-stablizer 2 are electrically connected with microcontroller 3, total line device 4, driver 5 respectively, and voltage-stablizer 2 is microcontroller 3, total line device
4, the output voltage of driver 5 is the direct current of 3.3VDC, and driver 5 and deep ultraviolet LED light 6 are electrically connected, microcontroller 3
IIC data line got involved in driver 5 via total line device 4, the quantity of deep ultraviolet LED light 6 is one, and the LED of driver 5 drives
Dynamic output end is linked into 6 positive and negative end of deep ultraviolet LED light.
The application uses the LM355x series core that the integrated IC for being exclusively used in driving camera flash, the IC are that TI company produces
Piece, major function are to be able to drive concatenated two pieces of high-power LED flashlights to design, therefore its output end voltage can be with
Up to 9V, and drive deep ultraviolet LED light, it is desirable to provide much higher than 6~9V driving voltage of common LED.Dimension, the application use
The mode for two pieces of LED driving of connecting in the prior art is changed to one piece of DUV lamp of driving by common low-voltage flash lamp driving chip,
And deep ultraviolet is driven to realize in the COD detection device of power consumption and cost sensitivity by modification driving chip internal schema
Detection light source of the LED light as equipment has low cost, high-precision, high performance effect.
Working principle is as follows:
When single-unit lithium polymer battery 1 is linked into circuit system, voltage-stablizer 2 starts work immediately, and to microcontroller
3, total line device 4, driver 5 provide the 3.3VDC DC power supply of low ripple, and maximum working voltage should reach 3A and stablize for system
Work reserves enough redundancies, and 3.3VDC DC power supply provides work electricity to microcontroller 3, total line device 4, driver 5 simultaneously
Source, device activation simultaneously enter power-up initializing state, and microcontroller 3 sends initialization directive by iic bus and flows through total line device
4, it is input in driver 5, after driver 5 receives initialization command, light lamp LED drive mode supplemented by automatic switchover, and
The over-and under-voltage defencive function of driving is closed, so far circuit system is completed to initialize and enters working condition.
After circuit system enters working condition, when needing to adjust the driving current of deep ultraviolet LED light 6, and depth is lighted
When ultraviolet LED lamp 6, microcontroller 3 exports the corresponding stair step current data of the driving of DUV required for measurement task light intensity and driving
Open command is passed to driver 5 via iic bus, and deep ultraviolet LED light 6 is lighted at once and enters constant current drive mode, in this electricity
In the design of road, system maximum drive current can reach 128 grades up to 4~500mA, driving current step value, and circuit area is controllable
System is within 7*8mm2, and driving current controls precision height, and long-time service driving current consistency is preferable, meets and is used as general measure
The performance indicator of the deep ultraviolet light source driving circuit of equipment and detecting instrument.
This programme by setting single-unit lithium polymer battery 1, voltage-stablizer 2, microcontroller 3, total line device 4, driver 5,
The cooperating of deep ultraviolet LED light 6 uses and is exclusively used in driving the integrated IC of camera flash-light as the driving of deep ultraviolet LED light
Chip, can efficiently, stabilized driving high pressure deep ultraviolet LED light, power consumption control be better than traditional scheme.Due to influencing DUV lamp precision
Main performance index be driving power device pulse signal and discrete component technique it is uncertain, used in this programme
Integrated IC will be easy affected discrete component and be integrated into same chip, it is enable to be influenced to guarantee by temperature drift
It is largely with uniformity, so that total system is easy to accomplish to the temperature-compensating of the luminous precision of DUV lamp, volume production product
Compensation effect consistency it is good.And integrated circuit area occupies minimum, is very suitable to small light COD detection device, cost compared with
It is low, it is highly suitable for cost-sensitive equipment or iteration is upgraded to original circuit for needing DUV apparatus of driving light source.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (4)
1. a kind of high pressure deep ultraviolet LED light constant-current drive circuit that can be used for measuring instrument, it is characterised in that: include:
The single-unit lithium polymer battery (1) of power supply, when needing measuring instrument, the single-unit lighium polymer are provided for driving circuit
Battery (1) accesses in the circuit system of measuring appratus to be measured；
The voltage-stablizer (2) connecting with single-unit lithium polymer battery (1), the voltage-stablizer (2) export three road 3.3VDC DC power supplies
To microcontroller (3), total line device (4), driver (5)；
Wherein, the IIC data line of the microcontroller (3) is linked into driver (5) via total line device (4)；Driver (5)
LED drive output is linked into the positive and negative end of deep ultraviolet LED light (6).
2. a kind of high pressure deep ultraviolet LED light constant-current drive circuit that can be used for measuring instrument according to claim 1, special
Sign is: the voltage-stablizer (2) is DCDC voltage-stablizer, and total line device (4) is iic bus device.
3. a kind of high pressure deep ultraviolet LED light constant-current drive circuit that can be used for measuring instrument according to claim 1, special
Sign is: the driver (5) is the integrated LM355x family chip for being exclusively used in driving camera flash.
4. a kind of high pressure deep ultraviolet LED light constant-current drive circuit that can be used for measuring instrument according to claim 1, special
Sign is: the quantity of the deep ultraviolet LED light (6) is one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822159912.XU CN209375986U (en) | 2018-12-21 | 2018-12-21 | A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822159912.XU CN209375986U (en) | 2018-12-21 | 2018-12-21 | A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument |
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| CN209375986U true CN209375986U (en) | 2019-09-10 |
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| CN201822159912.XU Active CN209375986U (en) | 2018-12-21 | 2018-12-21 | A kind of high pressure deep ultraviolet LED light constant-current drive circuit can be used for measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432516A (en) * | 2020-04-26 | 2020-07-17 | 湖南翔拓新创实业有限公司 | Deep ultraviolet L ED automatic control system and automatic control method thereof |
| CN111693805A (en) * | 2020-05-28 | 2020-09-22 | 珠海格力电器股份有限公司 | Detection circuit and detection method for detecting operating state of sterilization device |
-
2018
- 2018-12-21 CN CN201822159912.XU patent/CN209375986U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432516A (en) * | 2020-04-26 | 2020-07-17 | 湖南翔拓新创实业有限公司 | Deep ultraviolet L ED automatic control system and automatic control method thereof |
| CN111693805A (en) * | 2020-05-28 | 2020-09-22 | 珠海格力电器股份有限公司 | Detection circuit and detection method for detecting operating state of sterilization device |
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