CN210579383U

CN210579383U - Flashlight drive circuit

Info

Publication number: CN210579383U
Application number: CN201921250327.9U
Authority: CN
Inventors: 张记刚
Original assignee: Ningbo Yongen Electronic Technology Co ltd
Current assignee: Ningbo Yongen Electronic Technology Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-05-19
Anticipated expiration: 2029-08-05

Abstract

The utility model relates to a flashlight drive circuit, include positive terminal, negative terminal, alarm circuit, control circuit and prevent connecing reverse circuit, positive terminal in proper order with alarm circuit, prevent connecing reverse circuit and control circuit 'S input and be connected, the negative terminal is connected with alarm circuit in proper order and the output of preventing connecing reverse circuit, prevent connecing reverse circuit to include MOS pipe Q2, this MOS pipe Q2' S the G utmost point is connected with the positive terminal electricity, and the D utmost point of this MOS pipe is connected with the negative terminal electricity, and the S utmost point of this MOS pipe is connected with the control circuit output electricity.

Description

Flashlight drive circuit

Technical Field

The utility model relates to the field of lighting technology, especially, relate to a flashlight drive circuit.

Background

In daily life, people can connect the battery reversely due to misoperation, and when the alarm and the protection of a lower circuit are not provided, the damage of the lamp and the drive is easily caused, the service life of the lamp is greatly reduced, and the personal safety can be endangered.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a flashlight drive circuit is provided to solve prior art problem.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a flashlight drive circuit, includes positive terminal, negative terminal, alarm circuit, control circuit and prevents connecing reverse circuit, positive terminal in proper order with alarm circuit, prevent connecing reverse circuit and control circuit ' S input to be connected, negative terminal in proper order with alarm circuit with prevent connecing reverse circuit ' S output to be connected, prevent connecing reverse circuit to include MOS pipe Q2, this MOS pipe Q2 ' S the G utmost point is connected with the positive terminal electricity, and the D utmost point of this MOS pipe is connected with the negative terminal electricity, and the S utmost point of this MOS pipe is connected with the control circuit output electricity.

Preferably, a resistor R3 for voltage division is further disposed between the G pole and the positive pole terminal of the MOS transistor Q2, one end of the resistor R3 is connected to the positive pole terminal, the other end of the resistor R3 is connected to the G pole of the MOS transistor Q2, and the voltage dividing resistor R3 can prevent the G pole voltage of the MOS transistor Q2 from being too large, and can prevent the breakdown of the MOS transistor Q2.

Preferably, a zener diode D2 is further disposed between the S-pole of the MOS transistor Q2 and the G-pole of the MOS transistor Q2, one end of the zener diode D2 is connected to the S-pole of the MOS transistor Q2, the other end of the zener diode D2 is connected to the G-pole of the MOS transistor Q2, and the zener diode D2 can stabilize the voltage and prevent the breakdown of the MOS transistor Q2.

Preferably, the alarm circuit comprises a buzzer and a diode D1, the buzzer is connected with the negative electrode of the diode D1, and the buzzer is electrified to give an alarm after the battery is reversely connected.

Preferably, the control circuit comprises a control chip, a MOS transistor Q1, a button and an LED lamp, wherein one end of the button is connected with a zener diode D2, the other end of the button is connected with a KG end of the chip, an LED-end of the chip is connected with a G pole of a MOS transistor Q1, a D pole of the MOS transistor Q1 is connected with an input end of the LED lamp, an output end of the LED lamp is connected with an S pole of a MOS transistor Q2, the S pole of the MOS transistor Q1 is connected with a positive terminal, the button can send an electric signal to the chip, and the chip can control the brightness and the flicker frequency of the LED lamp through controlling a MOS transistor Q1 after receiving the electric signal.

Compared with the prior art, the utility model has the advantages of:

the utility model relates to an alarm circuit connects the reverse time at the battery and carries out the police dispatch newspaper through bee calling organ, and when the battery connects in reverse, prevents to connect reverse circuit nonconducting, can protect control circuit, has avoided the damage of electronic components and flashlight, the utility model relates to a rationally, accord with the market demand, be fit for promoting.

Drawings

Fig. 1 is a circuit diagram of a driving circuit of a flashlight of the present invention.

Detailed Description

As shown in fig. 1, the alarm device comprises a positive terminal, a negative terminal, an alarm circuit, a control circuit and an anti-reverse circuit, wherein the positive terminal is sequentially connected with the input ends of the alarm circuit, the anti-reverse circuit and the control circuit, the negative terminal is sequentially connected with the output ends of the alarm circuit and the anti-reverse circuit, the anti-reverse circuit comprises a MOS transistor Q2, the G pole of the MOS transistor Q2 is electrically connected with the positive terminal, the D pole of the MOS transistor is electrically connected with the negative terminal, and the S pole of the MOS transistor is electrically connected with the output end of the control circuit.

When the battery anti-connection buzzer is powered on during operation, an alarm is given out to remind a user that the battery is connected reversely, the G electrode of the MOS tube Q2 is at a low level, the D electrode and the S electrode of the MOS tube Q2 are not conducted, the control circuit is not conducted, and a protection effect is achieved;

if the battery is installed correctly, the buzzer is not electrified, the G pole of the MOS tube Q2 is at a high level, the D pole of the MOS tube Q2 is conducted with the S pole, the control circuit is electrified, and the control chip in the control circuit can control the level of the G pole of the MOS tube Q1 according to an electric signal sent by the button, so that the D pole of the MOS tube Q1 is controlled to be conducted with the S pole and not to be conducted, the LED lamp is electrified or deenergized, and the flickering frequency of the LED lamp is controlled.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a flashlight drive circuit, its characterized in that includes positive terminal, negative terminal, alarm circuit, control circuit and prevents connecing reverse circuit, positive terminal in proper order with alarm circuit, prevent connecing reverse circuit and control circuit ' S input and be connected, negative terminal in proper order with alarm circuit with prevent connecing reverse circuit ' S output and be connected, prevent connecing reverse circuit and include MOS pipe Q2, this MOS pipe Q2 ' S the G utmost point is connected with positive terminal electricity, this MOS pipe ' S the D utmost point is connected with negative terminal electricity, this MOS pipe ' S the S utmost point is connected with control circuit output electricity.

2. The flashlight driving circuit of claim 1, wherein a resistor R3 for voltage division is further disposed between the G pole and the positive terminal of the MOS transistor Q2, one end of the resistor R3 is connected to the positive terminal, and the other end of the resistor R3 is connected to the G pole of the MOS transistor Q2.

3. The flashlight driving circuit of claim 2, wherein a zener diode D2 is further disposed between the S-pole of the MOS transistor Q2 and the G-pole of the MOS transistor Q2, one end of the zener diode D2 is connected to the S-pole of the MOS transistor Q2, and the other end of the zener diode D2 is connected to the G-pole of the MOS transistor Q2.

4. A flashlight driving circuit according to claim 3, wherein said alarm circuit includes a buzzer connected to the negative terminal of diode D1 and diode D1.

5. The flashlight driving circuit of claim 4, wherein the control circuit comprises a control chip, a MOS transistor Q1, a button and an LED lamp, one end of the button is connected to the voltage regulator diode D2, the other end of the button is connected to the KG terminal of the chip, the LED-terminal of the chip is connected to the G terminal of the MOS transistor Q1, the D terminal of the MOS transistor Q1 is connected to the input terminal of the LED lamp, the output terminal of the LED lamp is connected to the S terminal of the MOS transistor Q2, and the S terminal of the MOS transistor Q1 is connected to the positive terminal.