CN206674255U - A kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps - Google Patents
A kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps Download PDFInfo
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- CN206674255U CN206674255U CN201720331925.3U CN201720331925U CN206674255U CN 206674255 U CN206674255 U CN 206674255U CN 201720331925 U CN201720331925 U CN 201720331925U CN 206674255 U CN206674255 U CN 206674255U
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Abstract
It the utility model is related to a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps, including voltage source E, IC-components Q2, MOS transistor device Q1, UVC_LED bactericidal lamp and two auxiliary resistances R1, R2, wherein, one end of voltage source E termination auxiliary resistance R1 and UVC_LED a bactericidal lamp, the auxiliary resistance R1 other end is connected with IC-components Q2 one end, the other end of UVC_LED bactericidal lamps is connected with MOS transistor device Q1 one end, the MOS transistor device Q1 other end is connected with auxiliary resistance R2 one end, auxiliary resistance R2 other end ground connection.The utility model forms fixed current principle with TL431 output Vref voltage references on resistance, designs simple constant-current source circuit, circuit is simple, cheap using 5 discrete devices；It is convenient to adjust continuous current size, stability is good, small power consumption, and constant current accuracy is high.
Description
Technical field
A kind of deep ultraviolet UVLED sterilization technology fields are the utility model is related to, are killed more specifically to a kind of UVLED
The protection of bacterium lamp and the constant-current source circuit of steady operation.
Background technology
Most of daily necessities sterilizations can use deep ultraviolet UVLED sterilizations at present, and drive deep ultraviolet UVLED bactericidal lamps electric
Source is voltage source or chip type constant-current source.When voltage source drives UVLED bactericidal lamps, such as voltage source, current limliting can not cause UVLED to kill
Bacterium lamp is burned, as voltage source current limliting and voltage instability timing can cause UVLED bactericidal lamp job insecurities；Chip type constant current
Source, price is high, and power consumption is big, and energy conversion efficiency is low.The constant-current source circuit that this right TL431 designs with 2N7002MOS pipes composition is more
The defects of having mended voltage source or chip type constant-current source driving deep ultraviolet UVLED bactericidal lamps, is highly suitable for low power consumption constant-current source device
Part.
Utility model content
The technical problems to be solved in the utility model is, providing one kind the defects of for prior art is based on deep ultraviolet
The constant-current source circuit of UVLED bactericidal lamps.
Technical scheme is used by the utility model solves its technical problem：Construction one kind is killed based on deep ultraviolet UVLED
The constant-current source circuit of bacterium lamp, including voltage source E, IC-components Q2, MOS transistor device Q1, UVC_LED bactericidal lamp and two are auxiliary
Resistance R1, R2 are helped, wherein, one end of termination auxiliary resistance R1 and UVC_LED a bactericidal lamp of the voltage source E, the voltage
Source E other end ground connection, the other end of the auxiliary resistance R1 are connected with IC-components Q2 one end, IC-components
Q2 other end ground connection, the other end of the UVC_LED bactericidal lamps are connected with one end of the MOS transistor device Q1, the metal-oxide-semiconductor
The device Q1 other end is connected with one end of the auxiliary resistance R2, the other end ground connection of the auxiliary resistance R2.
In a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps described in the utility model, the auxiliary electricity
Hinder R1, MOS transistor device Q1 and UVC_LED bactericidal lamp form a closed-loop path.
In a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps described in the utility model, the integrated electricity
Road device Q2 and MOS transistor device Q1 form a closed-loop path.
Implement a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps of the present utility model, have below beneficial to effect
Fruit：
The utility model forms fixed current principle with TL431 output Vref voltage references on resistance, designs letter
Single constant-current source circuit, circuit is simple, cheap using 5 discrete devices；It is convenient to adjust continuous current size, stability is good,
Small power consumption, constant current accuracy are high.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the constant current source circuit diagram of the present utility model based on deep ultraviolet UVLED bactericidal lamps.
Fig. 2 is the TL431 Vref and circumstance temperature of the constant-current source circuit of the present utility model based on deep ultraviolet UVLED bactericidal lamps
Corresponding relation figure.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Fig. 1 shows the constant current source circuit diagram of the present utility model based on deep ultraviolet UVLED bactericidal lamps, described based on dark purple
The constant-current source circuit of outer UVLED bactericidal lamps includes voltage source E, IC-components Q2, MOS transistor device Q1, UVC_LED bactericidal lamp
With two auxiliary resistances R1, R2, wherein, the voltage source E one termination auxiliary resistance R1 and UVC_LED bactericidal lamp one end,
The other end ground connection of the voltage source E, the other end of the auxiliary resistance R1 are connected with IC-components Q2 one end, integrated
Circuit devcie Q2 other end ground connection, the other end of the UVC_LED bactericidal lamps are connected with one end of the MOS transistor device Q1,
The other end of the MOS transistor device Q1 is connected with one end of the auxiliary resistance R2, the other end ground connection of the auxiliary resistance R2.
Specifically, the auxiliary resistance R1, MOS transistor device Q1 and UVC_LED bactericidal lamp form a closed-loop path.
Specifically, the IC-components Q2 and MOS transistor device Q1 form a closed-loop path.
As shown in figure 1, due to deep ultraviolet UVLED bactericidal lamp operating voltage ranges 3V to 10V or so, i.e. voltage source E work
It is also 3V to 10V or so as voltage.From Fig. 1, by the maximum current I1=V1/R3 ≈ 1MA of R1 devices；Q2 devices K
Pin electric current Ik ≈ I1 are very small.I.e. quiescent operation when small power consumption, energy conversion rate is high.
According to TL431 characteristics, Q2 device Rs pin is constant Vref magnitudes of voltage, i.e. the voltage at resistance R2 both ends is also equal to
Vref.Q1mos tube devices belong to voltage-type device, and the G electrode currents Igss for flowing through Q1mos tube devices is nA levels, so flowing through depth
The electric current Iout=Ir=Vref/R4=2.5V/ (R4 resistance values) of UV LED bactericidal lamps.Obtained from upper expression formula：When R4 hinders
When value is fixed, no matter how how the voltage of voltage source fluctuates in operating voltage range, flows through the electric current of deep ultraviolet UVLED bactericidal lamps
It is constant Iout values.
Because Iout=Vref/R4 and Vref are fixed value, when R4 resistances adjust, Iout values with R4 value changes, so as to
Meets the needs of designing different deep ultraviolet UVLED bactericidal lamps constant current sizes.From Fig. 2, TL431 Vref voltages are with ring around
Temperature change is very small；Temperature-coefficient of electrical resistance definition TCR=dR/R.dT, general precision resistance precision 0.1%, temperature coefficient
20ppm, the precision and temperature coefficient value of resistance are substituted into upper temperature definition and obtain dT as 50 DEG C, i.e., 50 DEG C of temperature difference resistance values become
Change 0.1%, it is seen that the stability of resistance is high.So Iout=Vref/R4 stability is good, precision is high.
The utility model forms fixed current principle with TL431 output Vref voltage references on resistance, designs letter
Single constant-current source circuit, circuit is simple, cheap using 5 discrete devices；It is convenient to adjust continuous current size, stability is good,
Small power consumption, constant current accuracy are high.
Although being disclosed by above example to the utility model, the scope of protection of the utility model not office
It is limited to this, under conditions of conceiving without departing from the utility model, each component is done to more than deformation, replacements etc. will be fallen into
In the right of utility model.
Claims (3)
1. a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps, it is characterised in that including voltage source E, integrated circuit device
Part (Q2), MOS transistor device (Q1), UVC_LED bactericidal lamps and two auxiliary resistances (R1, R2), wherein, the one of the voltage source E
Terminate one end of auxiliary resistance (R1) and UVC_LED bactericidal lamps, the other end ground connection of the voltage source E, the auxiliary resistance
(R1) the other end is connected with the one end of IC-components (Q2), the other end ground connection of IC-components (Q2), described
The other end of UVC_LED bactericidal lamps is connected with the one end of the MOS transistor device (Q1), the other end of the MOS transistor device (Q1)
It is connected with one end of the auxiliary resistance (R2), the other end ground connection of the auxiliary resistance (R2).
2. a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps as claimed in claim 1, it is characterised in that described
Auxiliary resistance (R1), MOS transistor device (Q1) and UVC_LED bactericidal lamps form a closed-loop path.
3. a kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps as claimed in claim 1, it is characterised in that described
IC-components (Q2) and MOS transistor device (Q1) form a closed-loop path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720331925.3U CN206674255U (en) | 2017-03-31 | 2017-03-31 | A kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720331925.3U CN206674255U (en) | 2017-03-31 | 2017-03-31 | A kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps |
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| CN206674255U true CN206674255U (en) | 2017-11-24 |
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| CN201720331925.3U Active CN206674255U (en) | 2017-03-31 | 2017-03-31 | A kind of constant-current source circuit based on deep ultraviolet UVLED bactericidal lamps |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701048A (en) * | 2019-02-25 | 2019-05-03 | 镇江美格尔科技有限公司 | It is a kind of isolation, constant current driving function of supplying power deep UV sterilize LED light |
-
2017
- 2017-03-31 CN CN201720331925.3U patent/CN206674255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701048A (en) * | 2019-02-25 | 2019-05-03 | 镇江美格尔科技有限公司 | It is a kind of isolation, constant current driving function of supplying power deep UV sterilize LED light |
| CN109701048B (en) * | 2019-02-25 | 2023-09-15 | 江苏吉凯中科技有限公司 | Isolation and constant current drive power supply deep ultraviolet sterilization LED lamp |
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