CN218830714U

CN218830714U - Deep ultraviolet LED constant current drive circuit based on lithium battery power supply

Info

Publication number: CN218830714U
Application number: CN202222692074.9U
Authority: CN
Inventors: 汤磊; 刘继军; 吴叶楠; 徐丽琼
Original assignee: Jiaxing Dingga Semiconductor Co ltd
Current assignee: Jiaxing Dingga Semiconductor Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-04-07
Anticipated expiration: 2032-10-10

Abstract

The utility model provides a dark ultraviolet LED constant current drive circuit based on lithium battery powered comprises lithium cell charge and discharge circuit, work indicator lamp circuit, boost circuit, child's lock switch circuit and dark ultraviolet LED current drive circuit. The input end of the boost circuit is connected with the first output end of the lithium battery charging and discharging circuit, the first output end of the boost circuit, the second output end of the boost circuit are respectively connected with the first input end of the child lock/switch circuit and the second input end of the work indicating lamp circuit, the third output end of the lithium battery charging and discharging circuit and the first output end of the deep ultraviolet LED current driving circuit are respectively connected with the first input end and the second input end of the deep ultraviolet LED current driving circuit, the third output end of the lithium battery charging and discharging circuit and the first output end of the deep ultraviolet LED current driving circuit are both connected with the work indicating lamp circuit, and the second output end of the deep ultraviolet LED current driving circuit is connected with the deep ultraviolet LED. The utility model has the advantages that: the deep ultraviolet LED lamp is efficiently and stably driven, the power consumption is low, the circuit occupied area is small, the deep ultraviolet LED lamp is suitable for light and small-sized disinfection electric appliances, and the cost is low.

Description

Deep ultraviolet LED constant current drive circuit based on lithium battery power supply

Technical Field

The utility model relates to a dark ultraviolet LED technical field that disinfects especially relates to a dark ultraviolet LED constant current drive circuit based on lithium cell power supply.

Background

With the expansion of new coronavirus in the world, the demand of electric appliances with disinfection and sterilization functions is increasing, the importance of surface disinfection is increasing day by day, and portable deep ultraviolet disinfection electric appliances for disinfection are more and more popular for objects in public places (such as express delivery points, schools, restaurants, hospitals and the like) and public transportation vehicles and other places. Deep ultraviolet sterilization is the killing of viruses by exposing them to ultraviolet light. The deep ultraviolet sterilization effect mainly determines a deep ultraviolet lamp bead, namely a deep ultraviolet LED. The deep ultraviolet LED is a typical current-driven device, and can precisely control the LED driving current, and determine many parameters including optical power, power efficiency, heat dissipation, brightness, and the like. The driving of a deep ultraviolet LED mainly consists in controlling its current, which is a current control mode whether the driving current is directly increased or decreased or the duty ratio (PWM) is decreased to control the on-off time ratio, but the purpose is not the same. However, the conventional scheme adopts a special deep ultraviolet driving IC, and has the disadvantages of large volume, high price and high static power consumption; the other traditional scheme is that a high-voltage MOS power device is adopted to build a driving circuit, and the scheme adopts the discrete layout of electronic components, so that the circuit is large in size, and interference is easily introduced to influence the driving current error, so that the light emission of the deep ultraviolet LED is unstable. The traditional scheme is not suitable for being applied to portable deep ultraviolet LED disinfection electric appliances sensitive to power consumption. Therefore, a technical scheme of a deep ultraviolet LED constant current driving circuit with small volume, high efficiency and less heat generation needs to be designed.

Disclosure of Invention

In order to solve the problem, the utility model provides a dark ultraviolet LED constant current drive circuit based on lithium battery powered for dark ultraviolet LED disinfects, include: the lithium battery charging and discharging circuit is used for providing a power supply for the driving circuit, and comprises a lithium battery charging and discharging circuit, a booster circuit, a child lock/switch circuit, a deep ultraviolet LED current driving circuit, a working indicator lamp circuit and a deep ultraviolet LED;

lithium cell charging and discharging circuit output is connected to the boost circuit input, boost circuit output is one, child lock/switch circuit input and work indicator lamp circuit are connected respectively to output two, child lock/switch circuit output and lithium cell charging and discharging circuit output are two to be connected deep ultraviolet LED current drive circuit input one and input two respectively, work indicator lamp circuit is all connected with deep ultraviolet LED current drive circuit output three and deep ultraviolet LED current drive circuit output one to lithium cell charging and discharging circuit output, deep ultraviolet LED is connected to deep ultraviolet LED current drive circuit output two, external power adapter is connected to lithium cell charging and discharging circuit input.

Further, the charging and discharging circuit of the lithium battery is a charging and discharging circuit of a single 14500 lithium battery, and the charging and discharging circuit of the single 14500 lithium battery comprises a single linear charging chip TP4054 of the lithium battery, a single protection chip DW01 of the lithium battery, a voltage stabilizing chip 8205S, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a capacitor C7 and a capacitor C8.

Furthermore, the 1 st pin of TP4054 and the 4 th pin of TP4054 are both connected with a working indicator lamp circuit; TP4054 Pin 2 is connected to GND; the 3 rd pin of the TP4054 is connected with one end of a capacitor C7, one end of a capacitor C8 and one end of a resistor R2 and the positive electrode of the lithium battery; the 5 th pin of the TP4054 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with GND, the other end of the resistor R3 is respectively connected with the other end of a capacitor C7, the other end of a capacitor C8 and one end of a resistor R4, and the other end of the resistor R4 is respectively connected with the cathode of a lithium battery, one end of the capacitor C3 and the DW01 6 th pin; the DW01 th pin 5 is respectively connected with the other end of the resistor R2 and the other end of the capacitor C3; the DW01 1 st pin is connected with the 8205S 6 th pin; the DW01 pin 3 is connected with the 8205S pin 4; the 2 nd pin DW01 is connected with one end of a resistor R5, and the other end of the resistor R5 is respectively connected with the 3 rd pin 8205S and the ground; 8205S 1 st pin is respectively connected with the negative electrode of the lithium battery, the other end of the resistor R4 and the DW01 6 th pin; 8205S the 2 nd pin is connected to the 5 th pin.

Further, the boost circuit comprises a DC/DC boost chip ME6206A33XG, a resistor R14, a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C1.

Furthermore, A3 rd pin of ME6206A33XG is respectively connected with the anode of the lithium battery and one end of a capacitor C4, and the other end of the capacitor C4 is connected with GND; the 2 nd pin of ME6206A33XG is respectively connected with one end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C5 and the other end of the capacitor C6 are both connected with GND, the other end of the resistor R14 is respectively connected with the 1 st pin of NY8A051B/SOP and one end of a capacitor C1 of the singlechip, the other end of the capacitor C1 is connected with GND, and the 1 st pin of ME6206A33XG is connected with GND.

Furthermore, the child lock/switch circuit adopts a singlechip NY8A051B/SOP, a light-on key S1 and a child lock sliding key S4, wherein the model of S1 is SW-PB, the model of S4 is MTS-10x, and the No. 1 pin of NY8A051B/SOP is connected with a booster circuit; the NY8A051B/SOP 5 th pin is connected with S1, and the NY8A051B/SOP 7 th pin is connected with the anode of the LED 1; and an 8 th pin NY8A051B/SOP is connected with GND, and a 6 th pin NY8A051B/SOP and S4 are connected with the deep ultraviolet LED current driving circuit.

Further, the deep ultraviolet LED current driving circuit comprises a constant-current constant-voltage LED driving chip ME2170, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R13, a capacitor C9, a capacitor C10, a capacitor C11, an inductor L1, a triode Q2, a field-effect tube Q1, a field-effect tube Q4 and a Schottky diode D1, wherein the model of Q2 is S8050, the models of Q1 and Q4 are both ST2301, and the model of D1 is SS54.

Furthermore, the 7 th pin and the 8 th pin of the ME2170 are both connected with one end of an inductor L1 and the cathode of a schottky diode D1, the other end of the inductor L1 is connected with the 3 rd pin of Q1 and the 2 nd, 5 th and 6 th pins of the ME2170, the anode of the schottky diode D1 is connected with one end of a resistor R7, one end of a capacitor C9 and a TP1 (deep ultraviolet LED anode), and the other end of the capacitor C9 is connected with GND; pins 2, 5 and 6 of the ME2170 are connected with one end of a capacitor C10, one end of a capacitor C11 and a pin 3 of the field effect transistor Q1, and the other end of the capacitor C10 and the other end of the capacitor C11 are both connected with GND; the 1 st pin of the ME2170 is directly connected with GND; the 3 rd pin of the ME2170 is respectively connected with TP2 (cathode of deep ultraviolet LED) and one end of a resistor R11, and the other end of the resistor R11 is connected with GND; the 4 th pin of the ME2170 is connected with one end of a resistor R7 and one end of a resistor R9, the other end of the resistor R7 is connected with TP1 (anode of a deep ultraviolet LED), and the other end of the resistor R9 is connected with GND; the 1 st pin of field effect transistor Q1 is with the collecting electrode of resistance R6 one end and Q2, the resistance R6 other end is connected Q4 3 rd pin and Q1 2 nd pin respectively and is linked to each other, Q2's base set links to each other with resistance R10 one end, the resistance R10 other end links to each other with singlechip NY8A051B SOP 6 th pin, Q2's projecting pole ground connection, Q4 3 rd pin is connected with the 2 nd pin of lithium cell positive pole respectively and Q1 and the resistance R6 other end, the Q4 1 st pin respectively with resistance R8 one end, resistance R13 one end links to each other, Q4 2 nd pin is connected to the resistance R13 other end, the resistance R8 other end links to each other with child lock/switch circuit.

Furthermore, the working indicator light circuit comprises a light emitting diode LED1, a light emitting diode LED2, a resistor R1, a resistor R12 and a capacitor C2, wherein the anode of the LED1 is connected with the 7 th pin of the child lock/switch circuit, the cathode of the LED1 is connected with one end of the resistor R12, and the other end of the resistor R12 is connected with the 1 st pin of the child lock/switch circuit; the positive pole of LED2 links to each other with lithium battery charge-discharge circuit, and the LED2 negative pole links to each other with resistance R1 one end, and the resistance R1 other end links to each other with external power adapter and electric capacity C2 respectively, and electric capacity C2 another termination GND.

Further, the deep ultraviolet LED is a gallium nitride semiconductor deep ultraviolet LED with the model of DGA-50-3535, the output wavelength of the deep ultraviolet LED is 254nm, and the luminous power of the deep ultraviolet LED is 50mW.

The utility model provides a beneficial effect that technical scheme brought is: the deep ultraviolet LED lamp is efficiently and stably driven, the power consumption is low, the circuit occupied area is small, the deep ultraviolet LED lamp is suitable for light and small-sized disinfection electric appliances, and the cost is low.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a circuit frame diagram of a deep ultraviolet LED constant current driving circuit based on lithium battery power supply in an embodiment of the present invention;

fig. 2 is a specific circuit exploded view of a deep ultraviolet LED constant current driving circuit based on lithium battery power supply in an embodiment of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a dark ultraviolet LED constant current drive circuit based on lithium cell power supply. Referring to fig. 1-2, fig. 1 is a circuit frame diagram of a deep ultraviolet LED constant current driving circuit based on lithium battery power supply in an embodiment of the present invention, and fig. 2 is a detailed circuit exploded view of a deep ultraviolet LED constant current driving circuit based on lithium battery power supply in an embodiment of the present invention, which specifically includes: the lithium battery charging and discharging circuit is used for providing a power supply for the driving circuit, and comprises a lithium battery charging and discharging circuit, a booster circuit, a child lock/switch circuit, a deep ultraviolet LED current driving circuit, a working indicator lamp circuit and a deep ultraviolet LED;

the input end of the booster circuit is connected with the first output end of the lithium battery charging and discharging circuit, the first output end of the booster circuit, the second output end of the booster circuit is connected with the first input end of the child lock/switch circuit and the second input end of the working indicator lamp circuit, the third output end of the lithium battery charging and discharging circuit and the second output end of the lithium battery charging and discharging circuit are connected with the first input end of the deep ultraviolet LED current driving circuit and the second input end of the deep ultraviolet LED current driving circuit, the third output end of the lithium battery charging and discharging circuit and the first output end of the deep ultraviolet LED current driving circuit are connected with the working indicator lamp circuit, the second output end of the deep ultraviolet LED current driving circuit is connected with the deep ultraviolet LED (namely, a single deep ultraviolet LED in figure 1), and the input end of the lithium battery charging and discharging circuit is connected with an external power adapter. The external power adapter adopts a chip J1, and the TYPE of the J1 is TYPE-C-6P.

The single 14500 lithium battery charging and discharging circuit comprises a single lithium battery linear charging chip U2 (the model of U2 is TP 4054), a single lithium battery protection chip U3 (the model of U3 is DW 01), a voltage stabilization chip Q3 (the model of Q3 is 8205S), a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a capacitor C7 and a capacitor C8, wherein the resistor R2 is 100 omega, the resistor R3 is 2K omega, the resistor R4 is 0 omega, the resistor R5 is 1K omega, the capacitor C3 is 0.1 muF, the capacitor C7 is 10 muF, and the capacitor C8 is 0.1 muF. The 1 st pin of the TP4054 is connected with the anode of an LED2 of the work indicator light circuit, the cathode of the LED2 is connected with one end of a resistor R1, the other end of the resistor R1 is also connected with the 4 th pin of the TP4054, the A9 pin of the J1, the B9 pin of the J1 and one end of a capacitor C2, and the other end of the capacitor C2 is Grounded (GND); TP4054 Pin 2 is connected to GND; the 3 rd pin of TP4054 is connected with one end of a capacitor C7, one end of a capacitor C8, one end of a resistor R2 and the anode of a lithium battery (BAT 1); the 5 th pin of TP4054 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with GND, the other end of the resistor R3 is also connected with the other end of a capacitor C7, the other end of a capacitor C8 and one end of a resistor R4 respectively, and the other end of the resistor R4 is connected with the cathode of a lithium battery (BAT 1), one end of the capacitor C3 and the DW01 6 th pin respectively; the DW01 th pin 5 is respectively connected with the other end of the resistor R2 and the other end of the capacitor C3; the DW01 1 st pin is connected with the 8205S 6 th pin; the DW01 pin 3 is connected with the 8205S pin 4; the 2 nd pin DW01 is connected with one end of a resistor R5, and the other end of the resistor R5 is respectively connected with the 3 rd pin 8205S and the ground; 8205S 1 st pin is respectively connected with the negative electrode of a lithium battery (BAT 1), the other end of the resistor R4 and the DW01 6 th pin; 8205S Pin 2 is connected to Pin 5. In this embodiment, the number of 14500 lithium batteries is one.

TP4054 as battery charge management IC, can be used for controlling the lithium battery charging current accurately, the chip enters the self-protecting state when the lithium battery is connected in reverse; the single lithium battery protection chip DW01 and the voltage stabilization chip 8250S are used as a lithium battery protection circuit, the phenomenon that the service life of a battery is shortened or the battery is damaged due to overcharge, overdischarge and overlarge current of the lithium battery is avoided, a high-precision voltage detection and time delay circuit and charging enable function are achieved, a self-recovery function is achieved, and accidents caused by charging and discharging heavy current of the battery are avoided.

The boost circuit comprises a direct current (DC/DC) boost chip U4 (the U4 is ME6206A33 XG), a resistor R14, a capacitor C1, a capacitor C4, a capacitor C5 and a capacitor C6, wherein the resistor R14 is 0 omega, the capacitors C4-C5 are 10 muF, the capacitor C6 is 0.1 muF, and the capacitor C1 is 0.1 muF. The 3 rd pin of ME6206A33XG is respectively connected with the anode of the lithium battery and one end of a capacitor C4, and the other end of the capacitor C4 is connected with GND; the 2 nd pin of ME6206A33XG is respectively connected with one end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C5 and the other end of the capacitor C6 are both connected with GND, the other end of the resistor R14 is respectively connected with the 1 st pin of NY8A051B/SOP and one end of a capacitor C1 of the singlechip, the other end of the capacitor C1 is connected with GND, and the 1 st pin of ME6206A33XG is connected with GND.

ME6206A33XG is to rise the 3.7V voltage of the lithium battery to 5V, and supply power to the LED1\ LED2 in singlechip NY8A051B/SOP and work indicator lamp circuit in the child lock/switch circuit.

The deep ultraviolet LED current driving circuit comprises a constant-current constant-voltage LED driving chip U6 (the U6 is ME2170 in model), resistors R6-R11, a resistor R13, capacitors C9-C11, an inductor L1, a triode Q2 (the Q2 is S8050 in model), a field-effect tube Q1 (the Q1 is ST2301 in model), a field-effect tube Q4 (the Q4 is ST2301 in model) and a Schottky diode D1 (the D1 is SS54 in model). The 7 th pin and the 8 th pin of the ME2170 are both connected with one end of an inductor L1 and the cathode of a Schottky diode D1, the other end of the inductor L1 is connected with the 3 rd pin of Q1 and the 2 nd, 5 th and 6 th pins of the ME2170, the anode of the Schottky diode D1 is connected with one end of a resistor R7, one end of a capacitor C9 and the TP1 (deep ultraviolet LED anode), and the other end of the capacitor C9 is connected with GND; pins 2, 5 and 6 of the ME2170 are connected with one end of a capacitor C10, one end of a capacitor C11 and a pin 3 of a field effect transistor Q1, and the other end of the capacitor C10 and the other end of the capacitor C11 are connected with GND; the 1 st pin of the ME2170 is directly connected with GND; the No. 3 pin of ME2170 is connected with TP2 (cathode of deep ultraviolet LED) and one end of a resistor R11 respectively, and the other end of the resistor R11 is connected with GND; the 4 th pin of the ME2170 is connected with one end of a resistor R7 and one end of a resistor R9, the other end of the resistor R7 is connected with TP1 (anode of a deep ultraviolet LED), and the other end of the resistor R9 is connected with GND; the 1 st pin of field effect transistor Q1 links to each other with resistance R6 one end and Q2 ' S collecting electrode, the resistance R6 other end is connected Q4 3 rd pin and Q1 2 nd pin respectively, Q2 ' S basis set links to each other with resistance R10 one end, the resistance R10 other end links to each other with singlechip NY8A051B SOP 6 th pin, Q2 ' S emitter ground, Q4 3 rd pin and lithium cell positive pole are connected with Q1 ' S2 nd pin and resistance R6 other end respectively, Q4 1 st pin respectively with resistance R8 one end, resistance R13 one end links to each other, Q4 2 nd pin is connected to the resistance R13 other end, the children ' S lock smooth key S4 that the resistance R8 other end was linked to each other with lock/switch circuit. In FIG. 2, TP7 is TP1, and TP8 is TP2.

The constant current output by the rear end is controlled by the size of the resistor R9.

The child lock/switch circuit comprises a single chip microcomputer U1 (the U1 model is NY8A 051B/SOP), a light opening key S1 (the S1 model is SW-PB) and a child lock sliding key S4 (the S4 model is MTS-10 x). The NY8A051B/SOP 1 st pin is connected with the other end of the resistor R14 and the other end of the resistor R12; the NY8A051B/SOP 5 th pin is connected with S1, and the other end of the S1 is connected with GND; the NY8A051B/SOP 6 th pin is connected with a resistor R10; the NY8A051B/SOP 7 th pin is connected with the anode of the LED 1; the 8 th pin of NY8A051B/SOP is connected with GND, one end of S4 is connected with a resistor R8, the other end of S4 is connected with GND, and the other end of the resistor R8 is respectively connected with the 1 st pin of resistors R13 and Q4.

The child lock/switch circuit adopts a singlechip NY8A051B/SOP chip to control whether the deep ultraviolet LED works, the singlechip NY8A051B/SOP collects signals of a key S1 and a slide key S4, and the child lock/switch circuit can be used for controlling the on/off of the deep ultraviolet LED when the S1 key is pressed and the S4 slide key is moved.

The working indicator lamp circuit comprises a light emitting diode LED1, a light emitting diode LED2, a resistor R1, a resistor R12 and a capacitor C2. The positive pole of the LED1 is connected with the 7 th pin of the child lock/switch circuit U1, the negative pole of the LED1 is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the 1 st pin of the child lock/switch circuit U1 (a singlechip NY8A 051B/SOP); the positive pole of the LED2 is connected with the No. 1 pin of the TP4054, the negative pole of the LED2 is connected with one end of a resistor R1, the other end of the resistor R1 is respectively connected with J1 and a capacitor C2, and the other end of the capacitor C2 is connected with GND.

The LED1 is a red high-brightness LED, when the deep ultraviolet LED is lighted, the LED1 lamp can be lighted, when the lithium battery needs to be charged, the LED1 can flash to prompt that the 14500 lithium battery needs to be charged through the J1 interface, and when the charging is finished, the LED1 lamp can be turned off. The LED2 is a blue high-brightness LED, when the deep ultraviolet LED is lighted for working, the LED2 lamp can twinkle and shine, otherwise, the LED2 lamp is extinguished.

The deep ultraviolet LED is a gallium nitride semiconductor deep ultraviolet LED with the model of DGA-50-3535, the output wavelength of the deep ultraviolet LED is 254nm, and the luminous power of the deep ultraviolet LED is 50mW. In this embodiment, the number of the deep ultraviolet LED lamps is one.

In this embodiment, the charging and discharging circuit of the single 14500 lithium battery and the deep ultraviolet LED current driving circuit are integrated into a double-sided board structure, and the shape is circular: the plate diameter is 15.5mm and the plate thickness is 0.6mm. The working indicator lamp circuit, the booster circuit and the child lock/switch circuit are integrated into a double-sided board structure, and the shape is circular: the plate diameter is 15.5mm and the plate thickness is 0.6mm.

The utility model has the advantages that: according to the scheme, the single 14500 lithium battery charging and discharging circuit, the work indicator lamp circuit, the booster circuit, the child lock/switch circuit and the deep ultraviolet LED current driving circuit are designed to work in a matched mode, the chip ME2170 is used as a driving chip of the deep ultraviolet LED lamp, the deep ultraviolet LED lamp can be driven efficiently and stably, and power consumption control is superior to that of the traditional scheme. Because the main performance index influencing the light power of the deep ultraviolet LED is the process uncertainty of a pulse signal and a discrete element of a driving power device, the integrated IC used in the scheme integrates the discrete element which is easy to influence into the same chip, so that the discrete element is influenced by temperature drift to ensure consistency to a great extent, the temperature compensation of the whole system on the light power of the deep ultraviolet LED is easy to realize, and the compensation effect consistency of batch products is good. And the whole circuit area is very small, so that the circuit is very suitable for light and small disinfection appliances, is low in cost, and is very suitable for cost-sensitive products or upgrading and iterating the original deep ultraviolet LED driving circuit.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a dark ultraviolet LED constant current drive circuit based on lithium cell power supply which characterized in that: the method comprises the following steps: the lithium battery charging and discharging circuit is used for providing a power supply for the driving circuit, and comprises a lithium battery charging and discharging circuit, a booster circuit, a child lock/switch circuit, a deep ultraviolet LED current driving circuit, a working indicator lamp circuit and a deep ultraviolet LED;

2. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the single 14500 lithium battery charging and discharging circuit comprises a single linear charging chip TP4054 of the single lithium battery, a single lithium battery protection chip DW01, a voltage stabilizing chip 8205S, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a capacitor C7 and a capacitor C8.

3. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 2, characterized in that: the 1 st pin of TP4054 and the 4 th pin of TP4054 are both connected with a working indicator lamp circuit; TP4054 Pin 2 is connected to GND; the 3 rd pin of the TP4054 is connected with one end of a capacitor C7, one end of a capacitor C8 and one end of a resistor R2 and the positive electrode of the lithium battery; the 5 th pin of the TP4054 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with GND, the other end of the resistor R3 is respectively connected with the other end of a capacitor C7, the other end of a capacitor C8 and one end of a resistor R4, and the other end of the resistor R4 is respectively connected with the cathode of a lithium battery, one end of the capacitor C3 and the DW01 6 th pin; the DW01 th pin 5 is respectively connected with the other end of the resistor R2 and the other end of the capacitor C3; the DW01 1 st pin is connected with the 8205S 6 th pin; the DW01 pin 3 is connected with the 8205S pin 4; the 2 nd pin DW01 is connected with one end of a resistor R5, and the other end of the resistor R5 is respectively connected with the 3 rd pin 8205S and the ground; 8205S 1 st pin is respectively connected with the negative electrode of the lithium battery, the other end of the resistor R4 and the DW01 6 th pin; 8205S Pin 2 is connected to Pin 5.

4. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the boost circuit comprises a DC/DC boost chip ME6206A33XG, a resistor R14, a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C1.

5. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 4, characterized in that: the 3 rd pin of ME6206A33XG is respectively connected with the anode of the lithium battery and one end of a capacitor C4, and the other end of the capacitor C4 is connected with GND; the 2 nd pin of ME6206A33XG is respectively connected with one end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C5 and the other end of the capacitor C6 are both connected with GND, the other end of the resistor R14 is respectively connected with the 1 st pin of NY8A051B/SOP and one end of a capacitor C1 of the singlechip, the other end of the capacitor C1 is connected with GND, and the 1 st pin of ME6206A33XG is directly GND.

6. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the child lock/switch circuit adopts a singlechip NY8A051B/SOP, a light-opening key S1 and a child lock sliding key S4, wherein the model of S1 is SW-PB, the model of S4 is MTS-10x, and the No. 1 pin of NY8A051B/SOP is connected with a booster circuit; the NY8A051B/SOP 5 th pin is connected with S1, and the NY8A051B/SOP 7 th pin is connected with the anode of the LED 1; the NY8A051B/SOP 8 th pin is connected with GND, and the NY8A051B/SOP 6 th pin and S4 are connected with a deep ultraviolet LED current driving circuit.

7. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the deep ultraviolet LED current driving circuit comprises a constant-current constant-voltage LED driving chip ME2170, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R13, a capacitor C9, a capacitor C10, a capacitor C11, an inductor L1, a triode Q2, a field-effect tube Q1, a field-effect tube Q4 and a Schottky diode D1, wherein the model of Q2 is S8050, the models of Q1 and Q4 are both ST2301, and the model of D1 is SS54.

8. The deep ultraviolet LED constant current drive circuit based on lithium battery power supply as claimed in claim 7, characterized in that: the 7 th pin and the 8 th pin of the ME2170 are both connected with one end of an inductor L1 and the cathode of a Schottky diode D1, the other end of the inductor L1 is connected with the 3 rd pin of the Q1 and the 2 nd, 5 th and 6 th pins of the ME2170, the anode of the Schottky diode D1 is connected with one end of a resistor R7, one end of a capacitor C9 and the anode of the deep ultraviolet LED, and the other end of the capacitor C9 is connected with GND; pins 2, 5 and 6 of the ME2170 are connected with one end of a capacitor C10, one end of a capacitor C11 and a pin 3 of the field effect transistor Q1, and the other end of the capacitor C10 and the other end of the capacitor C11 are both connected with GND; the 1 st pin of the ME2170 is directly connected with GND; the 3 rd pin of the ME2170 is respectively connected with the cathode of the deep ultraviolet LED and one end of a resistor R11, and the other end of the resistor R11 is connected with GND; the 4 th pin of the ME2170 is connected with one end of a resistor R7 and one end of a resistor R9, the other end of the resistor R7 is connected with the anode of the deep ultraviolet LED, and the other end of the resistor R9 is connected with GND; the 1 st pin of field effect transistor Q1 is with the collecting electrode of resistance R6 one end and Q2, the resistance R6 other end is connected Q4 3 rd pin and Q1 2 nd pin respectively and is linked to each other, Q2's base set links to each other with resistance R10 one end, the resistance R10 other end links to each other with singlechip NY8A051B SOP 6 th pin, Q2's projecting pole ground connection, Q4 3 rd pin is connected with the 2 nd pin of lithium cell positive pole respectively and Q1 and the resistance R6 other end, the Q4 1 st pin respectively with resistance R8 one end, resistance R13 one end links to each other, Q4 2 nd pin is connected to the resistance R13 other end, the resistance R8 other end links to each other with child lock/switch circuit.

9. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the working indicator lamp circuit comprises a light emitting diode LED1, a light emitting diode LED2, a resistor R1, a resistor R12 and a capacitor C2, wherein the anode of the LED1 is connected with the 7 th pin of the child lock/switch circuit, the cathode of the LED1 is connected with one end of the resistor R12, and the other end of the resistor R12 is connected with the 1 st pin of the child lock/switch circuit; the positive pole of LED2 links to each other with lithium battery charge-discharge circuit, and the LED2 negative pole links to each other with resistance R1 one end, and the resistance R1 other end links to each other with external power adapter and electric capacity C2 respectively, and electric capacity C2 another termination GND.

10. The deep ultraviolet LED constant current driving circuit based on lithium battery power supply as claimed in claim 1, characterized in that: the deep ultraviolet LED is a gallium nitride semiconductor deep ultraviolet LED with the model of DGA-50-3535, the output wavelength of the deep ultraviolet LED is 254nm, and the luminous power of the deep ultraviolet LED is 50mW.