CN217789288U

CN217789288U - Working lamp circuit and working lamp thereof

Info

Publication number: CN217789288U
Application number: CN202221087965.5U
Authority: CN
Inventors: 鄢遍; 卢雪锋
Original assignee: Shenzhen Aobai Technology Co Ltd
Current assignee: Shenzhen Aobai Technology Co Ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-11-11
Anticipated expiration: 2032-05-09

Abstract

The utility model belongs to the technical field of the work light, a work light circuit and work light thereof is related to, include: singlechip U4, main circuit, charge protection and charge agreement circuit, the main circuit with singlechip U4 is connected, charge protection and charge agreement circuit includes: the first voltage division circuit, triode Q1, triode Q2, triode Q3, triode Q4 and MOS pipe Q5. The advantage is that the short circuit of the working lamp can be prevented when the working lamp is used, and the situation that the working lamp is damaged is avoided.

Description

Working lamp circuit and working lamp thereof

Technical Field

The utility model belongs to the technical field of the work lamp, a work lamp circuit and work lamp thereof is related to.

Background

At present, a rechargeable lithium ion battery is generally adopted in an existing working lamp, a USB interface is exposed for charging, or the battery is placed into charging equipment for charging after being taken out, however, two common battery charging modes at present have some problems. Expose the mode problem that the USB interface charges and lie in sacrificing the waterproof performance of work light, moisture causes the work light to take place the short circuit in entering into the work light from the USB interface very easily so, leads to the work light to take place to damage, if adopt take out the battery and put into the mode that battery charging outfit charges after full charge, often dismouting battery causes wearing and tearing easily to the position of product installation battery to the waterproof dustproof performance of work light has also been reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a working lamp circuit and working lamp to prior art not enough, can prevent that the working lamp from taking place the short circuit when using, and lead to the working lamp to take place the condition of damage and take place.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an operating lamp circuit comprising: singlechip U4, main circuit, protection of charging and charging protocol circuit, the main circuit with singlechip U4 is connected, protection of charging and charging protocol circuit include: the power supply comprises a first voltage division circuit, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an MOS tube Q5, wherein the first voltage division circuit is connected with a No. 17 pin AD _ CHG port of a singlechip U4, the first voltage division circuit is further connected with a collector electrode of the triode Q1, a CHG-port is connected with a base electrode of the triode Q1, an emitter electrode of the triode Q1 is connected with a network BAT + port, a BAT + port is connected with a collector electrode of the triode Q2, a CHG-port is connected with an emitter electrode of the triode Q2, a base electrode of the triode Q3 is connected with a base electrode of the triode Q3, an emitter electrode of the triode Q3 is grounded, a collector electrode of the triode Q3 is connected with the network BAT + port, a No. 13 pin DATA port of the singlechip U4 is connected with a base electrode of the triode Q4, a collector electrode of the triode Q4 is connected with a collector electrode of the triode Q3, an emitter electrode of the MOS tube Q4 is grounded, a grid electrode of the MOS tube Q5 is connected with a collector electrode of the triode Q3.

Further, the first voltage dividing circuit includes: resistance R4 and resistance R7, the collecting electrode of triode Q1 is connected to resistance R4's one end, wherein one end of resistance R7 is connected to resistance R4's the other end, resistance R7's the other end ground connection, resistance R4 with resistance R7's the link to each other end is connected to No. 17 pin AD _ CHG ports of singlechip U4.

Further, the main circuit comprises: the power supply comprises a booster circuit and a current limiting circuit, the booster circuit is simultaneously connected with a power supply and the single chip microcomputer U4, the current limiting circuit is connected with the booster circuit, and the current limiting circuit is further connected with the single chip microcomputer U4.

Further, the operating lamp circuit further includes: with the low battery that singlechip U4 is connected reminds the circuit, low battery reminds the circuit and includes: MOS pipe Q6, diode D8 and MOTOR M1, no. 8 pin MOTOR ports of singlechip U4 are connected to MOS pipe Q6's grid, MOS pipe Q6's source ground connection, one of them one end of MOTOR M1 is connected to MOS pipe Q6's drain electrode, network BAT + port is connected to MOTOR M1's the other end, diode D8's input is connected to MOS pipe Q6's drain electrode and MOTOR M1's looks connection end, diode D8's output connection network BAT + port.

Further, the operating lamp circuit further includes: with electric quantity indicator lamp circuit that singlechip U4 is connected, electric quantity indicator lamp circuit includes: the input end of the LED lamp RG is connected with the network BAT + port, and the output end of the electric quantity indicating lamp circuit is connected with a No. 7 pin LEDG and a No. 14 pin LEDR of the single chip microcomputer U4 at the same time.

Further, the operating lamp circuit further includes: with the light sensing circuit that singlechip U4 is connected, light sensing circuit includes: photosensitive sensor U3, photosensitive sensor U3's No. 2 link with No. 6 pin ENSENSOR port connection of singlechip U4, photosensitive sensor U3's No. 1 link is connected No. 15 pin AD _ LIGHT port of singlechip U4.

Further, the working lamp circuit further includes: the heat sensing circuit is connected with the single chip microcomputer U4 and comprises: thermistor RT1 and resistance R20, thermistor RT 1's one end ground connection, thermistor's the other end is connected resistance R20, resistance R20's the other end is connected No. 6 pin ENSENSOR port of singlechip U4, resistance R20 with thermistor RT 1's the link termination is connected to singlechip U4's No. 19 pin AD _ TMP port.

Further, the singlechip U4 is also connected with a switch circuit.

The utility model also provides a work light, a serial communication port, include: the lamp comprises a base, wherein a circuit board is arranged in the base, and the circuit board is provided with the working lamp circuit.

Further, still be equipped with the installation region on the base, be equipped with anodal contact and negative pole contact on the installation region, anodal contact and negative pole contact are all fixed on the installation region through the waterproof glue, anodal contact and negative pole contact all with circuit board electric connection.

The utility model has the advantages that:

(1) Through setting up singlechip U4, main circuit, protection of charging and the protocol circuit that charges, the main circuit with singlechip U4 connects, protection of charging and the protocol circuit that charges include: the power supply comprises a first voltage division circuit, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an MOS (metal oxide semiconductor) tube Q5; when the external charging interface is not connected with the working lamp, the triode Q2 is not conducted, the current passes through the resistor R2 from the network BAT + port and the triode Q3 reaches the ground, the state of the triode Q3 is in saturation conduction, and because the potential of Vce _ Q3 is equal to that of Vgs _ Q5, the state of the MOS tube Q5 when the external charging interface is not connected is judged to be off, when the external factor causes the charging interface to be short-circuited, the MOS tube Q5 is in the off state and plays a role in protection, so that the internal short circuit of the working lamp is prevented when the working lamp is used, and the working lamp is prevented from being damaged.

(2) Through anodal contact and negative pole contact, and cooperate anodal contact and negative pole contact and working lamp circuit, make the working lamp only need charge when charging and be connected anodal contact and negative pole contact and just can realize charging of working lamp, neither need set up the waterproof performance that exposes the USB interface mode problem that charges and lie in the sacrifice working lamp, also need not take out the battery and put into the mode that battery charging outfit charges after full of the electricity and charge for the working lamp, thereby promote the waterproof dustproof performance of working lamp, avoid the working lamp short circuit to lead to the working lamp to take place to damage.

Drawings

Fig. 1 is a schematic diagram of a charge protection and charge protocol circuit according to the present invention;

FIG. 2 is a schematic diagram of the main circuit of the present invention;

FIG. 3 is a schematic diagram of the principle of the single chip microcomputer of the present invention

Fig. 4 is a schematic diagram of the low-medium power reminding circuit of the present invention;

FIG. 5 is a schematic diagram of the optical sensing circuit of the present invention;

FIG. 6 is a schematic diagram of a thermal sensing circuit according to the present invention;

FIG. 7 is a schematic diagram of a circuit of a power indicator of the present invention;

fig. 8 is a schematic diagram of the switching circuit according to the present invention.

The following are marked in the figure: .

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, an operating lamp circuit comprising: singlechip U4, main circuit, the protection of charging and the protocol circuit that charges, the main circuit is connected with singlechip U4, and the protection of charging and the protocol circuit that charges are connected with singlechip U4, and the protection of charging and the protocol circuit that charges include: the power supply comprises a first voltage division circuit, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an MOS (metal oxide semiconductor) tube Q5, wherein the first voltage division circuit is connected with a pin number 17 AD _ CHG port of a singlechip U4, the first voltage division circuit is also connected with a collector electrode of the triode Q1, a base electrode of the triode Q1 is connected with a CHG-port, an emitter electrode of the triode Q1 is connected with a network BAT + port, a collector electrode of the triode Q2 is connected with a BAT + port, a resistor R2 is connected between the collector electrode of the triode Q2 and the BAT + port, an emitter electrode of the triode Q2 is connected with a CHG-port, a base electrode of the triode Q2 is also connected with a collector electrode of the triode Q2, a base electrode of the triode Q2 is connected with a base electrode of the triode Q3, an emitter electrode of the triode Q3 is grounded, a collector electrode of the triode Q4 is connected with a ground, a collector electrode of the triode Q5 is connected with a drain electrode of the triode Q5, and a drain electrode of the triode Q3 is connected with a collector electrode of the triode Q3; in this embodiment, the model of the triode Q1 is DTA143EE, the models of the triode Q2 and the triode Q3 are TK3904, and the model of the triode Q4 is DTC143EE.

Through setting up singlechip U4, main circuit, protection of charging and charging protocol circuit, the main circuit with singlechip U4 is connected, protection of charging and charging protocol circuit with singlechip U4 connects, protection of charging and charging protocol circuit include: the power supply comprises a first voltage division circuit, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an MOS (metal oxide semiconductor) tube Q5; when the external charging interface is not connected with the working lamp, the triode Q2 is not conducted, current flows from a network BAT + port to the ground through the resistor R2 and the triode Q3, the state of the triode Q3 is in saturation conduction, and the single chip microcomputer U4 can judge that the state of the MOS transistor Q5 when the external charging interface is not connected is off due to the fact that the potential of Vce _ Q3 is equal to that of Vgs _ Q5, and when the external charging interface is short-circuited due to external factors, the MOS transistor Q5 is in the off state and plays a role in protection; when an external charging interface is accessed, the triode Q2 and the triode Q3 judge the voltage of the external interface and the voltage of a battery, if the interface voltage is lower than the voltage of the battery, the triode Q2 is not conducted, the current path is consistent with the above, the MOS tube Q5 is in a turn-off state and plays a role in protection, the electric quantity of the battery is not consumed outwards, if the interface voltage is higher than the voltage of the battery, the triode Q2 is conducted, the current passes through the resistor R2 from a network BAT + port, the triode Q2 is connected to a CHG-port, the triode Q3 is turned off, the value of Vce _ Q3 and Vgs _ Q5 is equal to VBAT +, and the MOS tube Q5 is conducted, and the circuit enters a charging state, so that the problem that the short circuit of the working lamp is caused by adopting a USB interface in the conventional working lamp is solved, and the service life of the working lamp is prolonged.

Referring to fig. 1, in one embodiment, a first voltage divider circuit includes: resistor R4 and resistor R7, triode Q1's collecting electrode is connected to resistor R4's one end, wherein one end of resistor R4's other end connecting resistance R7, and the other end ground connection of resistor R7, the end that is connected to resistor R4 and resistor R7 is connected to No. 17 pin AD _ CHG ports of singlechip U4.

Referring to fig. 2, in an embodiment, since the brightness change of the lamp light is mainly controlled by a direct driving manner of the MOS transistor when the existing working lamp works, since the difference between the supply voltage 3V-4.2V of the lithium ion battery and the working voltage 2.5-3.1V of the power light emitting diode determines that the efficiency is low, especially in a low-brightness gear, the current of the power light emitting diode is set to 10mA, the voltage of the power light emitting diode is 2.5V, if the full-power voltage of the lithium ion battery is 4.2V, the current consumed by the single chip microcomputer is 2mA, and the efficiency calculation formula is given under the condition that no other current consuming device exists: (2.5 × 10)/(4.2 × 10+4.2 × 2) the result is 0.496, that is, the efficiency is 49.6%, which results in low conversion efficiency of the light control circuit directly driven by the MOS transistor, especially when the working lamp is in a low bright position, the efficiency is less than 50%, when the working efficiency of the LED lamp set is too low, the heating of the LED during operation is more serious correspondingly, and therefore the main circuit is configured to include: boost circuit and current-limiting circuit, power supply and singlechip U4 are connected simultaneously to boost circuit, and current-limiting circuit is connected with boost circuit, and singlechip U4 is still connected to current-limiting circuit, and boost circuit includes: power management chip U1, the current limiting circuit includes: the amplifier U2, a pin 1 VOUT of a power management chip U1 is connected with capacitors C5, C7 and C6 in sequence and then connected with the input end of an LED lamp bank, a pin 2 PGND and a pin 5 AGND of the power management chip U1 are grounded, a pin 3 FB of the power management chip U1 is connected with a resistor R6 and then connected with a 4 connecting end of the amplifier U2, the connecting end of the resistor R6 and the pin 3 FB of the power management chip U1 is also connected with a resistor R5, the other end of the resistor R5 is connected with the pin 1 VOUT of the power management chip U1, the connecting end of the resistor R6 and the pin 3 FB of the power management chip U1 is also connected with a resistor R8, the other end of the resistor R8 is grounded, a pin 4 COMP of the power management chip U1 is connected with a resistor R9 and a capacitor C11 in sequence and then grounded, a pin 6 ILIM of the power management chip U1 is connected with a resistor R10 and then grounded, a pin FSW No. 7 of a power management chip U1 is sequentially connected with a resistor R1, an inductor L1, a capacitor C8, a capacitor C4, a capacitor C3 and a capacitor C2 and then connected with a network BAT + port, a pin VCC No. 8 of the power management chip U1 is connected with a capacitor C9 and then grounded, a pin SW No. 9 of the power management chip U1 is connected with a connecting end of the resistor R1 and the inductor L1, a capacitor C1 is connected between a pin BOOT No. 10 of the power management chip U1 and a pin SW No. 9 of the power management chip U1, a pin VIN No. 11 of the power management chip U1 is connected with an input end of the capacitor C8, a pin EN No. 13 of the power management chip U1 is connected with a pin ENU1 port No. 1 of a singlechip U4, a pin EN No. 13 of the power management chip U1 is connected with a pin ENU1 port of the singlechip U4 through a resistor R11, and the other end of the resistor R11 is grounded; the No. 1 connecting end of the amplifier is connected with the output end of the LED lamp bank after being connected with a resistor R12, the connecting end of the resistor R12 and the LED lamp bank is also connected with a resistor R13, the other end of the resistor R13 is grounded, the No. 2 connecting end of the amplifier is grounded, the No. 3 connecting end of the amplifier is connected with the resistor R18 and then grounded, the connecting position of the No. 3 connecting end of the amplifier and the resistor R18 is also sequentially connected with a capacitor C13, a resistor R15, a capacitor C12 and a resistor R14 and then connected with a No. 10 pin PWM port of a singlechip U4, the connecting position of the No. 3 connecting end of the amplifier and the resistor R18 is also sequentially connected with a resistor R16, a resistor R19 and a resistor R17 and then connected with a No. 9 pin ENMOON of the singlechip U4, the No. 5 connecting end of the amplifier U2 is connected with a No. 11 pin ENU2 port of the singlechip U4, the No. 5 connecting end of the amplifier U2 is also connected with a capacitor C10, and the other end of the capacitor C10 is grounded; in this embodiment, the LED lamp set is composed of an LED lamp D1, an LED lamp D2, and an LED lamp D3 connected in series in sequence.

Through cooperateing boost circuit and current-limiting circuit, make the work light when beginning to work, under the condition that ordinary electric current kept off the position, by the size of PWM network control output current, thereby control the luminance change of LED banks, under the condition that extremely low electric current kept off the position, the PWM network is the low level, the ENMOON network is the high level, through resistance R16, resistance R17, resistance R18 and R19 partial pressure produce a lower level control LED banks at extremely low luminance, singlechip U4 gets into dormancy, the power consumption is reduced, promote the work efficiency of LED banks, reduce generating heat of LED banks, thereby promote the live time of LED lamps.

Referring to fig. 4, in one embodiment, the operating lamp circuit further includes: the low-power warning circuit who is connected with singlechip U4, low-power warning circuit includes: the power supply comprises an MOS tube Q6, a diode D8 and a MOTOR M1, wherein the grid electrode of the MOS tube Q6 is connected with a pin MOTOR port No. 8 of a singlechip U4, a resistor R25 is further connected between the grid electrode of the MOS tube Q6 and the pin MOTOR port No. 8 of the singlechip U4, the other end of the resistor R25 is grounded, the source electrode of the MOS tube Q6 is grounded, the drain electrode of the MOS tube Q6 is connected with one end of the MOTOR M1, the other end of the MOTOR M1 is connected with a network BAT + port, the input end of the diode D8 is connected with the connection end of the drain electrode of the MOS tube Q6 and the MOTOR M1, the output end of the diode D8 is connected with the network BAT + port, a resistor R22 is further connected between the output end of the diode D8 and the network BAT + port, and two ends of the resistor R22 are further connected with a capacitor C15 in parallel; through setting up low power and reminding the circuit, when the electric quantity of work light crossed low, singlechip U4 can control motor work to the electric quantity of reminding the work light through the motor vibrations crosses low excessively, and convenience of customers in time charges for the work light.

Referring to fig. 7, in one embodiment, the operating lamp circuit further includes: electric quantity indicating lamp circuit that is connected with singlechip U4, electric quantity indicating lamp circuit includes: the input end of the LED lamp RG is connected with a network BAT + port, and the output end of the electric quantity indicating lamp circuit is simultaneously connected with a pin LEDG No. 7 and a pin LEDR No. 14 of the singlechip U4; the setting of electric quantity indicator light circuit for singlechip U4 sends the electric quantity of the suggestion pilot lamp of different colours.

Referring to fig. 5, in one embodiment, the operating lamp circuit further includes: light sensing circuit who is connected with singlechip U4, light sensing circuit includes: the No. 2 connecting end of the photosensitive sensor U3 is connected with an ENSENSOR port of a No. 6 pin of the single chip microcomputer U4, the No. 1 connecting end of the photosensitive sensor U3 is connected with an AD _ LIGHT port of a No. 15 pin of the single chip microcomputer U4, and the No. 3 connecting end and the No. 4 connecting end of the photosensitive sensor U3 are grounded; due to the arrangement of the LIGHT sensing circuit, when the working lamp is lighted by mistake, the output current of the ambient LIGHT sensor U3 is increased, the voltage generated on the resistor R21 is increased, and the voltage is transmitted to the singlechip U4 through the AD _ LIGHT network to trigger the protection function, so that the LIGHT of the working lamp is turned off.

Referring to fig. 6, in one embodiment, the operating lamp circuit further includes: and the heat sensing circuit is connected with the singlechip U4 and comprises: thermistor RT1 and resistance R20, thermistor RT 1's one end ground connection, thermistor's the other end connecting resistance R20, singlechip U4's No. 6 pin ENSENSOR port is connected to resistance R20's the other end, and resistance R20 and thermistor RT 1's the looks connecting end are connected to singlechip U4's No. 19 pin AD _ TMP port, and the thermal sensing circuit still includes: one end of the capacitor C14 is connected with a 19-number pin AD _ TMP port of the singlechip U4, and the other end of the capacitor C14 is grounded; due to the arrangement of the heat sensing circuit, when the temperature inside the working lamp changes, the resistance value of the thermistor RT1 changes, and the voltage of the AD _ TMP network changes, so that the single chip microcomputer U4 can identify an external temperature signal and perform corresponding protection and control signal processing, and the working lamp is prevented from being damaged due to long-time working under a high-temperature condition. .

Referring to fig. 8, in an embodiment, a switch circuit is further connected to the single chip microcomputer U4, and the switch circuit includes: and one end of the key S1 is connected with a SWITCH port of a No. 4 pin of the singlechip U4, and the other end of the key S1 is grounded.

The utility model also provides a work light, a serial communication port, include: the base is equipped with the circuit board in the base, has a working lamp circuit on the circuit board, and is further, still be equipped with the installation region on the base, be equipped with anodal contact and negative pole contact on the installation region, anodal contact and negative pole contact are all fixed on the installation region through waterproof glue to with anodal contact and negative pole contact and the department of being connected of base sealed, anodal contact reach negative pole contact all with circuit board electric connection.

The working principle is as follows: when the external charging interface is not connected with the working lamp, the triode Q2 is not conducted, the current flows from the network BAT + port to the ground through the resistor R2 and the triode Q3, the state of the triode Q3 is in saturation conduction, and the single chip microcomputer U4 can judge that the state of the MOS tube Q5 when the external charging interface is not connected is off due to the fact that the potential of Vce _ Q3 is equal to that of Vgs _ Q5, and when the external factor causes short circuit of the charging interface, the MOS tube Q5 is in the off state and plays a role in protection; when an external charging interface is accessed, the triode Q2 and the triode Q3 judge the voltage of the external interface and the voltage of a battery, if the interface voltage is lower than the voltage of the battery, the triode Q2 is not conducted, the current path is consistent with the above, the MOS tube Q5 is in a turn-off state and plays a role in protection, the electric quantity of the battery is not consumed outwards, if the interface voltage is higher than the voltage of the battery, the triode Q2 is conducted, the current passes through the resistor R2 from a network BAT + port, the triode Q2 is connected to a CHG-port, the triode Q3 is turned off, and the values of Vce _ Q3 and Vgs _ Q5 are equal to VBAT +, so that the MOS tube Q5 is conducted, and the circuit enters a charging state.

The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An operating lamp circuit, comprising: singlechip U4, main circuit, protection of charging and charging protocol circuit, the main circuit with singlechip U4 is connected, protection of charging and charging protocol circuit include: the power supply comprises a first voltage division circuit, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an MOS tube Q5, wherein the first voltage division circuit is connected with a No. 17 pin AD _ CHG port of a singlechip U4, the first voltage division circuit is further connected with a collector electrode of the triode Q1, a CHG-port is connected with a base electrode of the triode Q1, an emitter electrode of the triode Q1 is connected with a network BAT + port, a BAT + port is connected with a collector electrode of the triode Q2, a CHG-port is connected with an emitter electrode of the triode Q2, a base electrode of the triode Q3 is connected with a base electrode of the triode Q3, an emitter electrode of the triode Q3 is grounded, a collector electrode of the triode Q3 is connected with the network BAT + port, a No. 13 pin DATA port of the singlechip U4 is connected with a base electrode of the triode Q4, a collector electrode of the triode Q4 is connected with a collector electrode of the triode Q3, an emitter electrode of the MOS tube Q4 is grounded, a grid electrode of the MOS tube Q5 is connected with a collector electrode of the triode Q3.

2. The working lamp circuit according to claim 1, wherein the first voltage divider circuit comprises: resistance R4 and resistance R7, the collecting electrode of triode Q1 is connected to resistance R4's one end, wherein one end of resistance R7 is connected to resistance R4's the other end, resistance R7's the other end ground connection, resistance R4 with resistance R7's the link to each other end is connected to No. 17 pin AD _ CHG ports of singlechip U4.

3. The operating lamp circuit according to claim 1, wherein the main circuit comprises: the power supply comprises a booster circuit and a current limiting circuit, wherein the booster circuit is simultaneously connected with a power supply and the single chip microcomputer U4, the current limiting circuit is connected with the booster circuit, and the current limiting circuit is further connected with the single chip microcomputer U4.

4. The working lamp circuit according to claim 1, wherein the working lamp circuit further comprises: with low-battery warning circuit that singlechip U4 is connected, low-battery warning circuit includes: MOS pipe Q6, diode D8 and MOTOR M1, no. 8 pin MOTOR ports of singlechip U4 are connected to MOS pipe Q6's grid, MOS pipe Q6's source ground connection, one of them one end of MOTOR M1 is connected to MOS pipe Q6's drain electrode, network BAT + port is connected to MOTOR M1's the other end, diode D8's input is connected to MOS pipe Q6's drain electrode and MOTOR M1's the link terminal, diode D8's output link network BAT + port.

5. An operating lamp circuit according to claim 4, wherein said operating lamp circuit further comprises: with electric quantity indicator lamp circuit that singlechip U4 is connected, electric quantity indicator lamp circuit includes: the input end of the LED lamp RG is connected with the network BAT + port, and the output end of the electric quantity indicating lamp circuit is connected with a No. 7 pin LEDG and a No. 14 pin LEDR of the single chip microcomputer U4 at the same time.

6. An operating lamp circuit according to claim 1, wherein said operating lamp circuit further comprises: with the light sensing circuit that singlechip U4 is connected, light sensing circuit includes: photosensitive sensor U3, photosensitive sensor U3's No. 2 link with No. 6 pin ENSENSOR port connection of singlechip U4, photosensitive sensor U3's No. 1 link is connected No. 15 pin AD _ LIGHT port of singlechip U4.

7. The working lamp circuit according to claim 6, wherein the working lamp circuit further comprises: the heat sensing circuit is connected with the single chip microcomputer U4 and comprises: thermistor RT1 and resistance R20, thermistor RT 1's one end ground connection, thermistor's the other end is connected resistance R20, resistance R20's the other end is connected No. 6 pin ENSENSOR port of singlechip U4, resistance R20 with thermistor RT 1's the link termination is connected to singlechip U4's No. 19 pin AD _ TMP port.

8. The working lamp circuit according to claim 1, wherein a switch circuit is further connected to the single chip microcomputer U4.

9. A worklight, comprising: a base, wherein a circuit board is arranged in the base, and the circuit board is provided with an operating lamp circuit according to any one of claims 1-8.

10. The worklight of claim 9, wherein the base further comprises a mounting region, the mounting region comprises a positive contact and a negative contact, the positive contact and the negative contact are fixed on the mounting region by waterproof glue, and the positive contact and the negative contact are electrically connected to the circuit board.